JPH02268924A - Selection and combination device of dies for press brake - Google Patents

Abstract

PURPOSE:To freely combine various kinds of dies by taking out a split die held on a 1st holding means selectively, transferring it to a 2nd die holding means through a die selection transfer means and providing the die selection transfer means freely movable between the 1st and 2nd die holding means. CONSTITUTION:A die selection combination device for a press brake is provided with the 1st die holding means 46 which supports dies 50 having two or more kinds of tooth widths selectively and freely attachably and detachably. There is provided a 2nd die holding means 47 possible to hold at least one 50 of the dies 50. There is provided a die holding and releasing means 55g possible to selectively release the support of the die of the 1st die holding means 46. The split die 50 supported on the 1st die holding means 46 is taken out selectively and transferred by the selection transfer means 55 to the die holding means 47. This transfer means 55 is provided freely movably between the 1st and 2nd die holding means 46, 47. In this way, the die is selected and can be transferred from the 1st die holding means to the 2nd die holding means.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a press brake mold selection and combination device for combining press brake molds into a length suitable for processing.

(b), Prior Art Conventionally, in press brakes, only two or three types of molds can be exchanged, and it has been impossible to perform processing by exchanging various types of molds.

(C) 0 Problems to be solved by the invention However, recently, proposals have been made to perform processing by freely exchanging various types of molds. It has become necessary to appropriately set the tooth widths of various molds, and it has been desired to develop a mold selection and combination device that can do this.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a press brake mold storage device that can combine and generate molds with appropriate tooth widths from divided molds.

(d) Means for solving the zero problem, that is, the present invention provides a method for selectively and detachably holding split molds (50) having two or more types of face widths (L5) in a predetermined arrangement order. A second mold support means (47) is provided, which has one mold support means (46) and is capable of holding at least one divided mold (50) of the divided molds (50). , a mold support release means (55g) capable of selectively releasing the supporting state of the split mold of the first mold support means is provided, and the mold support release means (55g) is supported by the first mold support means (46). The split mold (5o) is selectively attached to the first mold support means (46).
) and transfers the mold selection transfer means (55) to the second mold support means (47) from the first mold support means (46) and the second mold support means (47). It is configured to be movable relative to the means (47).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings.

This description is not limited to the description on the drawings.

The same applies to the column "r(e), Effect" below.

(e) 3 Effects Due to the above-described configuration, 1 the present invention provides the first mold support means (
The split mold (50) supported by the mold selection transfer means (5S) is selected by the mold selection transfer means (5S) and transferred to the second mold support means (47).
) and used for processing.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view showing an example of a press brake to which an embodiment of the press brake mold selection and combination device according to the present invention is applied, and FIG. 2 is a perspective view showing an example of the automatic mold changing device to which an embodiment of the automatic mold changing device is applied. FIG. 2 is a side view showing an example of a press brake.

FIG. 3 is a view of the mold storage device in FIG. 2 in the direction of arrow m.

FIG. 4 is a plan view showing an example of an upper mold changing device, and FIG. 5 is a side view showing a mold selection station.

Fig. 6 is a front view of the mold selection station in Fig. 5, Figs. 7 and 8 are views showing an example of a split mold mounted on a split mold holder, and Fig. 9 is a diagram of a fixed-length mold. A front view showing an example, FIG.
FIG. 11 is a front view showing a split mold, FIG. 12 is a diagram showing main parts of a mold transfer device, and FIG. 13 is a diagram showing a shift cylinder.

Figure 14 is a side view of the shift cylinder, Figure 15 is a diagram showing the locking device, Figure 16 is a plan view of the transfer hook device, Figure 17 is a front view of the transfer hook device, and Figure 18 is the chain north. Fig. 19 is a side view of Fig. 18, Fig. 20 is a sectional view of the mold support device of the press rake, and Fig. 21 shows the relationship between the mold holder and mold exchange device. FIG. 22 is a view in the direction of arrow A in FIG. 21.

FIG. 23 is a diagram showing the operation of the mold changing device.

FIG. 24 is a flowchart showing an example of a mold exchange control program and a diagram showing the state of the mold exchange device in each step; FIGS. 25 to 27 are diagrams showing the shift state of the chain during mold movement.

FIG. 28 is a flowchart showing an example of a mold selection program, and FIG. 29 is a flowchart showing an example of a mold return program.

FIG. 30 is a flowchart showing an example of a first mold transfer program, FIG. 31 is a flowchart showing an example of a second mold transfer program, and FIG. 32 is a flowchart showing an example of a mold supply program.

Fig. 33 is a control block diagram showing an example of a press brake control system, Fig. 34 is a perspective view showing a workpiece to be machined, and Fig. 35 is a combination of upper molds for processing the workpiece shown in Fig. 34. FIG. 36 is a diagram showing a machining state of the workpiece shown in FIG. 34.

The press brake 1 is as shown in FIG.

It has a fuselage 2, and the fuselage 2 has a lower fuselage 3 provided at the bottom in FIG. 1 and an upper fuselage 5 provided above the lower fuselage 3. In the lower fuselage 3.

As shown in FIG. 20, a lower mold holding bag W6 is provided, and the lower mold holding device 6 has a base 6a. A lower mold holder 7 is provided on the base 6a so as to be detachable in the directions of arrows B and C in the figure, and holder clamp cylinders 6b are also provided on the base 6a at predetermined intervals in a direction perpendicular to the plane of the paper in FIG. By driving the clamp cylinder 6b to protrude in the direction of arrow E, the lower mold holder 7 can be held in the lower mold holding device 6. As shown in FIG. 1, the lower mold holder 7 has a main holder 7a formed over the entire length of the lower body 3, and a sub-holder 7b is attached to the upper surface of the main holder 7a by a clamp cylinder 7c. It is provided so as to be held on the main holder 7a. As shown in FIG. 21, the sub-holder 7b is
It is formed with a predetermined length Ll, and on each sub-holder 7b.

A lower mold 11 is attached.

On the other hand, as shown in FIG.
a is provided so as to be freely movable and driven in the directions of arrows B and C,
An upper mold support device 9 is provided at the lower part of the ram 5a in the figure. The upper mold support device 9 has a main body 9a mounted on a ram 5a.A holding groove 9b is formed in the main body 9a in a direction perpendicular to the plane of the drawing, and on the right side of the main body 9a in the figure,
A drive cylinder 9d with a clamper 9c provided on the main body 9a
is rotatably supported in the directions of arrows F and G.

An upper mold holder 12 is provided in the holding groove 9b so as to be detachable in the directions of arrows B and C, and the upper mold holder 12 has a main holder 12a.

As shown in FIG. 1, the main holder 12a is formed over approximately the entire length of the upper body 5.
A holding groove 12b is formed in the lower part of the figure in a direction perpendicular to the paper surface of FIG. ing.

At the lower part of the sub-holder 12c in FIG. 20, an upper mold 13 is removably provided by a holding pin 12d provided on the sub-holder 12c. Further, on both sides of the lower mold holder 7 and the upper mold holder 12, as shown in FIG. 21, holder holders 7d and 12e are provided. As shown in FIG. 22, two holding holes 7e and 12f are provided.

By the way, an automatic mold exchange device 15 is provided at the rear of the machine body 2 of the press brake 1 in FIG. Upper mold changing device 16. For replacing the lower mold holder 7, a lower mold exchange device 17 is provided at the rear of the lower body 3. In addition, the automatic mold changing device 15 is
As shown in FIG. 4, it has a frame 19, and the frame 19 is provided with bearings 19a, 19a. Note that the configuration below is completely the same for the upper mold changing device 16 and the lower mold changing device 17, so only the upper mold changing device 16 will be described, and the description of the lower mold changing device 17 will be omitted. A drive shaft 20 is provided in the bearings 19a, 19a so as to be rotatable in the directions of arrows A9, A10, and the drive shaft 20 has a double shaft hollow structure. The drive shaft 20 is.

It has a first hollow shaft 20a that forms the outer shape of the drive shaft 20 and is rotatably supported by bearings 19a, 19a.
A second hollow shaft 20b is rotatably supported inside the hollow shaft 20a with respect to the first hollow shaft 20a. Arms 21 and 22 are provided at both ends of the first hollow shaft 20a in FIG. 4, and a drive cylinder 23 is provided at the upper end of the arm 21 in FIG.

The tip of the arm 21.22, which is pivoted as shown in FIG. 2 via the ram 23a, extends downward in FIG. It is mounted horizontally so that it can rotate freely. A sleeve 26 is provided on the inside of each shaft 25, that is, on the inside of the arms 21.22, and is fixed to the rotating shaft 25. , that is, they are arranged symmetrically at a pitch of 180°. Retainers 29 and 29 are provided at the tips of the sub-arms 26a and 26a, respectively.Each retainer 29 supports a 1-rotation cylinder 29d for free rotation, and a 0-rotation cylinder 29d supports two holders. A pin 29a is provided so as to be freely protrusive and driveable in the direction of arrow H1. In addition, the rotating cylinder 29d
A gear 29b is attached to the gear 29b, and a gear 24 fitted to the boss portion at the tip of the arm 21.22 is engaged with the gear 29b via a timing belt 29c. Further, a gear 25a is fitted on the outside of the shaft 25 in FIG.
A gear 20c fixed to the second hollow shaft 20b is engaged with the gear 25a via a timing belt 29e. An output shaft 30a of a drive motor 30 is engaged with the gear 20c.

By the way, a mold storage device 31 is provided on the right side of the press brake 1 in FIG.
An upper mold storage device 33 for storing the upper mold and a lower mold storage device 35 for storing the lower mold are provided. As shown in FIG. 1, the upper mold storage device 33 has a chain conveying device 36 whose width is set to L2, and a chain conveying device 36 having a width of L3 is formed on the right side of the chain conveying device 36 in the figure. A chain transport device rI137 is provided. Chain conveyance device 3
The width L2 of 6 is approximately twice the width L3 of the conveying device 37, and the chain conveying device 36, as shown in FIG. It has one chain 41. Each chain 39, 40, 41 is wound endlessly around a plurality of sprockets 42, as shown in FIG. 42 is
As shown in FIGS. 18 and 19, the center of rotation CT1. CT2 is provided in a shifted form. A bracket 43 is provided between the chains 39 and 40, and the bracket 43 acts so that its mold mounting surface 43a is always maintained in a horizontal state due to the action of the chains 39 and 40 described above. Note that a configuration in which the chains 39 and 40 are shifted a predetermined distance to maintain the posture of an object held by the chains is known as a so-called double chain, so a detailed explanation thereof will be omitted here. Chain 41's.

A similar bracket (not shown) is mounted at a position opposite to the mounting position of the bracket 43 of the chain 39.40, and the chain 39.40 is mounted via the bracket 43 and the like.
A mold support device 45 is mounted between 40 and 41 with a double chain so that its mounting portion 45a always faces downward. The mold support device 45 is connected to the chain conveyance device 36
A plurality of molds are provided at predetermined intervals L4 in the direction of arrow J, which is the transport direction of It has been lowered. The fixed-length upper mold 49 held on the chain conveying device 36 side is formed to have a fixed length with a tooth width L5 of 835 m+, as shown in FIGS. The fixed size upper molds 49 are held one by one.

Further, the chain conveying device 37 is a chain conveying device 36
The structure is substantially the same as that of the first embodiment, and the same parts are given the same reference numerals and the explanation of the parts will be omitted.

As shown in FIG. 5, the chain conveying device 37 has two types of mold support devices: one is a split mold support device 46, and the other is a combination mold support device 47.
The 0 combination mold support device 47 and the split mold support device 46 are arranged in the direction of arrow J, which is the conveyance direction of the chain conveyance device 37.
, and are attached in pairs alternately at a predetermined interval L4 in the direction.

As shown in FIGS. 7 and 8, the split mold supporting device 46 includes one or more split upper molds 50 having various face widths L5, arranged in a predetermined arrangement order, that is, from left to right in the figure. Regarding the mold 50 with a narrow tooth width held in the zero-segment mold support device 46, which is mounted in the order in which the teeth [L5] become narrower toward the end, the support mode within the support device 46 is always constant. can be.

For example, as shown in FIG. 7, six split upper molds 50 are arranged in descending order of tooth width L5 from the left in FIG.
．． ．． 501, 504, 505, 506°50□ are installed. To explain the mounting manner in more detail, the split mold support device 46 has a main body 46a formed in an inverted shape, as shown in FIG. 5, and a clamper 46b is provided on the main body 46a. ing. The clamper 46b has a bracket 46c protruding to the right in the figure, and an engagement groove 46d is formed at the tip of the bracket 46c. Below the bracket 46d.

A hole 46h is bored in a shape corresponding to each split mold 50 supported by the support device 46, and a slider 46e is always moved toward the arrow M by the elasticity of the coil spring 46f in each type 46h.
It is provided in such a way that it is biased in the direction. Furthermore, an engaging portion 46g is provided at the tip of the slider 46s. A split mold 50 supported by the support device 46 is attached to the engaging portion 46g.
is held by being fitted into and engaged with an engagement groove 50b formed on the side surface of the holding portion 50a. In addition, regarding the split mold 50 with a wide tooth width as shown in FIG. 8, two or more sliders 46e for holding the mold are provided in the tooth width direction.

Note that the one-segment mold support device 46 includes a mold 5 shown in FIG.
In addition to the combination 0, as shown in FIG. 8, there is a combination of a wider tooth width mold 509 and an end-mounted mold 50o, and as shown in FIG. Half width mold 50
There are some things that are supported.

Further, the combination mold support device 47 has a main body 47a formed in a C-shape, and the main body 47a has a groove 47b.
The sub-holder 12c is provided in the groove 47b in a direction perpendicular to the plane of the paper in FIG. 47c is provided in such a manner that the sub-holder 12c can be fixedly held within the groove 47b, and the locking device 47
c has a lock pin 47d that is movably provided in the directions of arrows N and P. The lock pin 47d has a coil spring 47 provided to cover the periphery of the lock pin 47d.
e is always biased in the direction of arrow P, and furthermore, the tip of the lock release lever 47f is engaged with the tip of the lock pin 47d.

The lock release lever 47f is connected to the arrows Q and R via the pin 47g.
It is rotatably supported in the direction.

On the other hand, a divided mold selection station 51 is provided at the lower right position in FIG. 2 of the chain conveyor 37, that is, behind the press brake 1. The one-divided mold selection station 51 is shown in FIG. The frame 52 has a guide rail 52a formed in a direction perpendicular to the chain running direction. A moving station shim 53 is provided on the frame 52 so as to be movable in the directions of arrows S and T via a guide rail 52a, and the moving station 53 is engaged with the guide rail 52a on the lower surface as shown in FIG. It has a truck 55 provided with a linear bearing 55a. The frame 52 also shows the moving direction of the moving station 53. A timing belt 55c is stretched endlessly in the directions of arrows S and T in FIG. Fifth
It is fixedly held by a clipper 55a provided on the left side of the figure. Further, one pulley 52b is provided with a drive motor 5.
5b are connected to be rotatably driven in the forward and reverse directions, and by driving the drive motor 55b to rotate in the forward and reverse directions, the trolley 55 is connected via the pulley 52b and the timing belt 55c.
can be appropriately moved along the guide rail 52a in the directions of arrows S and T in FIG.

Further, a bracket 55f is provided on the truck 55, and a plurality of drive cylinders 55g are arranged on the bracket 55f at appropriate intervals in a direction perpendicular to the plane of FIG. 5. Further, on the opposite side of the bracket 55f on the truck 55, a slide block 55h is supported so as to be movable in the direction of arrow J, and between the slide block 55h and the truck 55, a drive cylinder 55i is connected to the slide block 55.
It is provided so that it can be freely moved and driven in the direction of arrow J.

A clamper 55j is provided on the slide block 55h. The clamper 55j has a bracket 55k protruding leftward in FIG. 1, and an engagement groove 55m is formed at the tip of the bracket 55. Holes 55n are bored in the lower part of the bracket 55 in a manner corresponding to each split mold 50 supported by the support device 46, and each type 55n has a slider 55p attached to a coil spring 55.
It is provided in such a way that it is always biased in the direction of arrow M due to the elasticity of q. Furthermore, an engaging portion 55 is provided at the tip of the slider 55q.
r is provided. Further, drive cylinders 55s are provided at positions corresponding to each slider 55P on the slide block 55h.

Next, as shown in FIG. 2, the lower mold storage device 35 is provided below the upper mold storage device 33 in the figure, and the lower mold transport device 35 has a chain transport device 56. There is. The structure of the chain conveying device 56 is substantially the same as that of the chain conveying device 36 of the upper mold conveying device 33, so the same parts as the chain conveying device 36 are given the same reference numerals, and the explanation of those parts will be omitted. . In the chain conveying device 56, a mold supporting device 57 is mounted at a predetermined interval L using a known double chain.
4, is supported with its mounting portion 57a facing upward at all times, and each mold support device 57 includes a unit lower mold 59 having a tooth width of L6, as shown in FIG. A predetermined number of them are combined to have a certain length and are held.

Further, a mold transfer device 60 is provided between the mold storage device 31 and the automatic mold exchange device 15, and the mold transfer device 60 transfers the upper mold 13 to the upper mold storage device 33. an upper mold transfer device 6 that performs a transfer operation between the upper mold exchange device 16 and the upper mold exchange device 16;
1, and a lower mold transfer device 62 that transfers the lower mold 11 between the lower mold storage device 35 and the lower mold exchange device 17.
It has As shown in FIG. 2, the upper mold transfer device 61 has a frame 63 provided on the upper body 5 of the press brake 1, and the left end portion of the frame 63 in FIG. .

Between the left end in FIG. 1 and the right end in FIG. 3 of the chain conveying device 37 of the upper mold storage device 33, the press brake 1 and mold storage device W131 are installed in the directions of arrows H and I in FIG. The transfer chain 65 crosses the sprockets 65a and 65.
It is stretched endlessly through a. As shown in FIGS. 16 and 17, the chain 65 is provided with transfer hook devices 69 at predetermined intervals, and each transfer hook device 69 has a main body 69a fixed to the chain 65. A hook 69c is provided on the main body 69a via a shaft 69b so as to be rotatable in the directions of arrows U and V.
A torsion coil spring 69ci is provided between 9c and the shaft 69b, and constantly biases the hook 69c in the direction of arrow V in FIG. On the upper side of the transfer chain 25 in FIG.
A large number of shift cylinders 69e are arranged at predetermined intervals with arrows H and I.
It is set in the direction. The shift cylinder 69a is the first
As shown in FIGS. 3 and 14, it has a main body 69g fixed to a frame 63, and a cylinder 69h is provided on the main body 69g so that a rod 69f can be freely protruded and driven in the arrow W and x directions. ing. 1 at the tip of rod 69f
An arm 69j rotatably provided in the Y and Z directions is pivotally attached to the main body 69g via a pin 69i, and a shift roller 69k is rotatably supported at the tip of the arm 69j. As shown in FIG. 13, the shift cylinders 69a are usually provided in pairs, one on each side, sandwiching the transfer chain 65.

Further, the lower mold transfer device 62 is connected to a frame 7o provided on the lower body 3 of the press brake 1, as shown in FIG.
12 of the frame 70, and therefore the left end of the press brake 1 in FIG. 1 and the lower mold storage device 3.
A transfer chain 71 is connected to a sprocket between the right end of the chain conveying device 56 in FIG. 3 and the right end in FIG. It is stretched endlessly through 71a, 71a. Like the chain 65, the chain 71 is provided with transfer hook devices 69 at predetermined intervals, as shown in FIGS. They are provided in pairs, one at a time.

By the way, the control system of the press brake 1 has a main control section 72, as shown in FIG. Ram memory 77, ram control section 79. A mold selection station control section 80. A mold exchange device control section 81, a mold transfer device control section 82, a mold storage device control section 83, a system program memory 85, a program analysis calculation section 87, etc. are connected.

Since the press brake 1 has one or more configurations,
When bending a workpiece 86 along the line X1-Xi as shown in FIG. 34 using the press brake 1, the operator inputs the following commands to the main control section 72 via the input section 76 shown in FIG. A command is given to execute the bending process of the workpiece 86. Then, the main control unit 72 reads the mold supply program MSP from the system program memory 85, and supplies a combination of molds to be used for machining the workpiece 86 based on the supply program MSP.

That is, in step S1 of the supply program MSP shown in FIG. 32, the main control unit 72 instructs the program analysis calculation unit 87 to calculate a combination according to the type and face width of the mold used for machining the workpiece 86. command. In response to this,
The program analysis calculation section 87 is connected to the program memory 77.
Read out the cannibal program PRO corresponding to the workpiece 86 from , and check the type of mold such as straight sword shape or gooseneck shape specified in the cannibal program PRO, and the face width L7 of the mold (
(see Figure 1), etc. In the case of the workpiece shown in FIG. 34, the upper mold used for processing is the end portion 86a of the workpiece 86.
In order to prevent interference between the mold and the mold during bending, the mold is made as shown on the left side of Figure 5.

A so-called gooseneck mold with a hook-shaped cross section is specified in the Canadian Nitrogram PRO. Furthermore, a combination of upper molds to be used for machining is calculated from the tooth width L7 of the mold specified in the program PRO. That is, in the upper mold,
As already mentioned, tooth +111L5 is, for example, 835am
A fixed length upper mold 49 as shown in FIG. 9 is formed to a fixed length.
Then, there is a split upper mold 50 shown in FIGS. 7 and 8, which is formed with a face width L5 smaller than that of the fixed-length mold, and matches the mold face width L7 specified in the Canadian Niprogram PRO. The combination of the split mold 50 and the fixed length mold 49 is determined so as to. Here, as shown in FIG. 35, the program analysis calculation section 87 calculates, among the split upper molds 50 shown in FIG. 50. The upper mold 13 is obtained by selecting the fixed length upper mold 49 shown in FIG. 9 and the end mounting mold 50° shown in FIG. 8 and combining these molds as shown in FIG. 36. The tooth width is set to be L7. thus.

When the program analysis calculation unit 87 determines that the type of mold to be used is a gooseneck type and also determines the combination of the split upper mold 50 and the like constituting the upper mold 13, the main control unit 72 executes the step of the mold supply program MSP. In step S2, the mold selection station control section 80 and the mold storage device control section 83 appropriately combine the gooseneck-shaped split stopper molds 5o calculated and determined in step S1, and the tooth as shown in FIG. An instruction is given to assemble partial upper molds 13a and 13b with widths L7□ and L7□.

In response to this, the mold storage device control unit 83 reads the mold selection program SEI shown in FIG. , drive motor 3
4 through the sprocket 42 in the direction of arrow J in Fig.
That is, the split mold support device 46 that supports the gooseneck-shaped split upper mold 50 is driven and controlled so as to be positioned at the mold supply position P1 of the split mold selection station 51 shown in FIG. At this time, since the cart 55 of the one-divided mold selection station 51 is positioned at the standby position on the left side of FIG. The mold support device 46 and the like can be operated smoothly without interference.

In this way, the split mold support device 46 moves to the predetermined mold supply position P.
1, the process proceeds to step S4, and the mold storage device control section 83 moves the mold supply position P shown in FIG.
The positioning pin device 89 provided in 1 is connected to the mold support device 4.
6 and move the mold support device 46 to the mold supply position RP.
1. Accurately position and hold. Next, in step S5, the mold selection station control unit 80 rotates the drive motor 55b of the mold selection station 51 shown in FIG. The top of the slide block 55 is moved to the right in FIG. 6, and as shown in FIG.
Mold support device 4 with h positioned at mold supply position P1
Position it at a position opposite to 6. Slide block 5
5h faces the mold support device 46, step S6 is entered and all drive cylinders 55s on the slide block 55h side of the one carriage 50 are driven. Then, the rod 55U of the driven drive cylinder 55s is driven to protrude in the direction of the arrow in FIG. 5, and its tip touches the slide block 55h.
are in contact with the sliders 55p, respectively, and the sliders 55p
is raised in the direction of the arrow against the coil spring 55q.

Then, the raised slider 55p is in a state where the distance between its engaging portion 55r and the engaging groove 55m of the bracket 55 is narrowed, that is, it is in an unclamped state.

Therefore, the mold selection program SEL enters step S7 and drives the immediate action cylinder 55i to move the slide block 55h in the direction of arrow J, that is, toward the split mold support device 46 positioned at the mold supply position P1. let Then, the engagement groove 55m and the engagement portion 55r in the unclamped state are
It fits into the engagement groove 50b formed on the side surface of the holding portion 50a of each split mold 5o supported by the split mold support @46. Next, among all the drive cylinders 55s brought into the driving state in step S8, the end mounting mold 50□, the split upper mold 50. ．． 50, and the drive cylinders 55s provided in 46 pieces of one divided mold support device of one truck 50 are released.
Of the 5g, there are 50 end-mounted molds and 50 split upper molds for which mold selection is instructed. ．． Drive cylinder 55 corresponding to 50s
Drive only g. Then, the rod 55t of the drive cylinder 55g is selectively driven in the direction of the arrow, and among the divided molds shown in FIG. 7, the end fitting mold 50□, the divided upper mold 50. , 50. are disengaged, and the molds are ready to be removed in the direction of the arrow in FIG. That is, in this state, of the split mold support device 46, the end mounting mold 5
0 work, split upper mold 501.50. The engagement on the support device 46 side is released and the slide block 55hfi engages and holds the split mold 50 other than the above, and the split molds 50 other than the above still maintain the state of being supported on the support device 46 side. Next, the mold selection program SE1 enters step S9 and drives the drive cylinder 55i in the direction of the arrow to move the slide block 55h in the direction of the arrow. Then, the end mounting mold 502, the split upper mold 503, 50, . Only,
It is separated from the support device 46 side and is transferred in the direction of the arrow by the slide block 55h.

In this way, when the split mold 50 constituting the partial upper mold 13a has been selected, step 510 is entered and the first carriage 55 is selected.
is moved in the direction of arrow S in FIG. 6 and returned to a predetermined standby position wp on the left side of the figure. Next, in step Sll, the mold storage device control unit 83 drives the chain conveyance device 37 to move the split mold support device 46, which had been positioned at the mold supply position P1, to the arrow S in FIG. direction by a distance L4 to position the adjacent combination mold support device 47 provided corresponding to the support device 46 at the mold supply position P1, and similarly in step SL2, the positioning pin device 89 is moved.
to keep it fixed. next.

In step S13, the drive cylinder 55i is driven to advance the slide block 55h in the direction of arrow J, and the selected end mounting mold 50 on the slide block 55h is moved forward.
The first step is to align the holding groove 12g of the sub-holder 12c supported by the positioned combined mold support device 47 with the mounting part 50c formed on the upper part of the holding part 50a of the divided upper mold 503.50s, and then the mold supply step. The unclamp cylinder 90 provided at position P1 is moved to press the holding pin L2d of the sub-holder 12c in the direction of arrow J, and the sub-holder 12
Let c be in an unclamped state.

In this state, step S14 is entered and the trolley 55 is moved at low speed in the downward direction of the arrow in FIG. Then, the mounting portion 50 of the selected upper split mold 5o on the slide block 55h
c is inserted into the holding groove 12g of the sub-holder 12c in a direction perpendicular to the plane of FIG. Slide block 55h
The split upper mold 50 held on the combination mold support device 4
inside the holding groove 12g of the sub-holder 12c supported by the holder 6.

In the process of moving rightward in FIG. 6, the end-mounted mold 50□1-split upper mold 50. is held on the slide block 55h. ．． 50. The right side surface and sub-holder 12 in FIG. 35 of the mold 50s installed on the rightmost side in FIG.
The rightmost position of c, ie.

When the holder end face 12h in FIG. 35 matches, the split upper mold 50. position corresponding to .

That is, the driving cylinder 55s provided at the bottom in FIG. 5 is driven to drive the rod 55u to protrude in the direction of the arrow. Then, the slider 55p that supports the lot 55u and the upper split mold 50 comes into contact with each other, moving the slider 55p in the direction of the arrow, and the engaging portion 55r of the slider 55p and the upper split mold 5 are brought into contact with each other.
0. The engagement state with the engagement groove 50b is released, and the upper split mold 50. teeth.

Insert the right end surface into the sub holder 12c and insert it into the holder end surface 12h.
It will be kept in a form that matches the The cart 55 with the split upper mold 50 retained in the sub-holder 12c continues to be driven and moved in the downward direction of the arrow in FIG. Then, the split upper mold 5
0. With the transfer to the sub-holder 12C, the split upper mold 50. is now supported on the rightmost side in FIG. 6 of the slide block 55h. The split upper mold 50. is transferred to the sub-holder 12c. , approaches the left side surface 50a in FIG. 35. The mold selection station control unit 80 selects the split upper mold 5
0. The right side 50d in FIG. 35 is the split upper mold 50. , the upper split mold 50. is in contact with the left side surface 50e in FIG. The drive cylinder 55s provided at a position corresponding to , that is, at the bottom in FIG. 5 is driven to drive the rod 55u to protrude in the direction of the arrow. Then, the rod 55u and the slider 55p that supports the upper split mold 50 come into contact with each other, and move the slider 55P in the direction of the arrow, causing the engagement portion 55r of the slider 55p and the upper split mold 50. The engagement state with the engagement groove 50b is released, and the one-segment upper mold 50. is the sub holder 12c
Inside, the right end surface 50゛d is divided into the upper mold 50. The six-part upper mold 50. is placed in contact with the left side surface 50e of the upper mold 50.
．． The trolley 55 in which 50J is placed in the sub-holder 12c is
It continues to be moved and driven in the downward direction of the arrow in FIG. Then, the 1-piece upper mold 50. ．． 50. Along with the transfer to the sub-holder 12c, the end-mounted mold 50, which is supported on the rightmost side in FIG. 6 of the slide block 55h, is now transferred to the sub-holder 12c. 50, no, 3rd
Approach the left side surface 50a in Figure 5. The mold selection station control section 80 operates on the right side surface 50 of the end-mounted mold 501 in FIG.
When d comes into contact with the left side surface 50e in FIG. 35 of the split upper mold 50°, the drive cylinder 55g provided at the position corresponding to the end mounting mold 50 is driven to move the rod 55u.
is driven to protrude in the direction of the arrow, the engagement between the engagement portion 55r of the slider 55p and the engagement i1!150b of the end mounting mold 50□ is released, and the end mounting mold 50. of.

Inside the sub-holder 12c, an upper mold 50 with its right end surface divided,
The device is placed in contact with the left side 50e of the device.

Split upper mold 50. ．． The cart 55 with the end mounting mold 503 and the end mounting mold 50□ retained in the sub-holder 12c continues to be driven to move in the downward direction of the arrow in FIG. 6 until it reaches the retracted position EP on the right side in FIG.

In this way, when the trolley 55 reaches the retracted position EP, the drive of the unclamp cylinder 90, which enters step 316 of the mold selection program SEI, is released and the sub-holder 1
2c holds the divided upper mold 50-503 and the end-mounted mold 50□ which have been completely transferred. Then, as shown in FIG. 35, a split upper mold 50. is attached to the sub-holder 12c.
．． A partial upper mold 13a having a tooth width of L7□ is formed by providing 50° and end fitting molds 50 in close contact with each other. In this state, the drive cylinder 55i of the cart 55 of the split mold selection station 51 is driven.

The slide block 55h is moved backward in the direction of the arrow in FIG. 5, and is positioned a predetermined distance to the left in FIG. 5 with respect to the combination mold support device 47 positioned at the mold supply position NP1. In this state, step S17 is entered, and the trolley 55 is moved again in the direction of arrow S in FIG. 6 and returned from the retreat position EP to the standby position w'p on the left side in the figure.

In this way, the partial upper mold 13a constituting the left end portion of the upper mold 13 in FIG. Assemble the upper mold 13b. This assembly operation is performed at the split mold selection station 51 in the same manner as in the case of the partial upper mold 13a, and the split mold support device 46 holding the end-mounted mold 500 shown in FIG. The mold selection station 51 is positioned at the mold supply position P1, and in that state, the slide block 55h of the trolley 55 is moved.
Transfer the end mounting mold 5o to.

Further, the transferred end-mounted mold 50 is placed on the adjacent combination mold support device 47 corresponding to the split mold support device 46.
．． are mounted so that the right end surface 12h of the sub-holder 12c and the left side surface 50e of the end fitting mold 50° coincide with each other, as shown in FIG. 35, to assemble the partial upper mold 13b shown in FIG.

In this way, when the partial upper molds 13a and 13b constituting the upper mold 13 are assembled into the combination mold support device 47, 47 shown in FIG. Step S18 of the mold supply program MSP is entered, and the mold storage device control section 83 and mold transfer device control section 82 are instructed to transfer the partial upper molds 13a, 13b and the fixed length upper mold 49 to the automatic mold exchanger. 15, the upper mold exchange device 16,
A command is given to perform the operation of supplying the unit lower mold 59 to the lower mold changing device 17. In addition, lower mold 1 used for processing
1 is the face width L of the mold specified by the Kani program PRO
7, as shown in FIG.
The number of attachments is calculated and determined by the program analysis calculation unit 87.

Note that the lower mold 11 is simply used when processing the workpiece 86.
Since it only plays the role of receiving 6, its tooth width L8 is
The teeth [L7 of the upper mold 13 are less important in processing than the teeth [L7], and need only be wider than the tooth width L7 of the upper mold 13.

The operation of transferring the upper mold 13 from the upper mold storing device 33 on the mold storing device 3 to the upper mold changing device 16 of the automatic mold changing device 15 is performed by the first mold transfer shown in FIG. Program FM
T (stored in system program memory 85)
Prior to the transfer operation, the main control section 72 causes the mold exchange device control section 81 to drive the upper mold exchange device 16 of the automatic mold exchange device 15 so that the arm 21
．． 22 at a predetermined standby position. The upper mold exchange bag N16 is as shown in FIG.
The drive cylinder 23 positions the upper mold 13 in three positions: a standby position (1), a mold exchange position (2), and a mold reversal position (3).
At the mold exchange position (2),
The upper mold is replaced with the upper mold support device 9 of the press brake 1, and furthermore, at the mold reversal position (3), the sub-arm 26a is reversed by 180°. Therefore, the upper mold changing device 16 is positioned at the standby position (1).

Next, the mold storage device control unit 83 controls the drive motor 3 shown in FIG.
8 to move the empty mold support device 45 on which the fixed size upper mold 49 is not mounted in the L direction as indicated by the arrow, and place it in the standby position (1) of the upper mold changing device 16 described above. handle,
The mold is positioned at the mold transfer position P2 shown in FIG. next.

In step S20, the combination mold support device 47, which holds the partial upper mold 13a assembled earlier, on the chain conveyance device 37 side is similarly positioned at the mold transfer position P2. Then, the empty mold support device 45 on the chain transport device 36 side and the one-part upper mold 13 on the chain transport device 37 side
Combination mold support device 47 for holding a. Furthermore, as shown in FIG. 3, the upper mold holder 12 held between the retainers 29 and 29 of the upper mold changing device 16 and in which the upper mold has not yet been inserted and set is at the transfer position P2. The shape is aligned in the direction of arrow H1■.

In this state, step 521 is entered, and the mold transfer device control unit 82 controls the plurality of shift cylinders 6 of the upper mold transfer device 61.
9e, the pair of shift cylinders 69e, 69e located on the rightmost side in FIG. The shift cylinder 69e provided at the position corresponding to the shift cylinder 69e is driven. As shown in FIG. 13, the rods 69f of the shift cylinders 69e, 69e on the M matching mold support device 47 side are made to protrude in the direction of the arrow W in the figure, and are moved above the transfer chain 65 when the upper mold exchange device 16 is tilted down. The rod 69f of the shift cylinder 69e located at is also made to protrude in the W direction. Then, the transfer chain 65 is shifted by the shift roller 69k to the left side in FIG. 13, that is, the upper mold exchange device 16 side is shifted downward in the figure by a distance fiL7, and as a whole, one combined mold is assembled as shown in FIG. 25. From the support device 47 to the exchange device 1
As shown in FIG. 25, the portion of the upper mold holder 12 supported by the upper mold holder 6 up to the position where the partial upper mold 13a is to be mounted is shifted downward by a distance L7.

In this state, the first mold transfer program FMT enters step S22 and starts the transfer chain 65.

Rotate in the A1 direction in FIG. 25, that is, in the forward direction. Then,
The hook 69c of the transfer hook device 69 attached to the transfer chain 65 moves in the A1 direction together with the transfer chain 65. In a normal state in which the transfer chain 65 is not shifted downward, the hook 69c is connected to the first
As shown in Figure 7, the phase is shifted in the vertical direction, so
Even when the chain 65 rotates, the two do not come into contact with each other, but when the transfer chain 65 is shifted downward,
The hook 69c and the engagement protrusion 12i implanted in the sub-holder 12c supported by the mold support device 45.47 abut and engage with each other. Therefore, when the transfer chain 65 is shifted as shown in FIG. 25, the hook 69c of the transfer hook device 69 is shifted downward together with the chain 65 on the right side of the chain conveyance device 37 in FIG. Ru. Then, the engaging protrusion 121 of the sub-holder 12c holding the partial upper mold 13a held by the combination mold support device 47 positioned at the mold transfer position P2 of the conveyance device 37 and the hook of the transfer hook device 69 69c abuts and engages with the sub holder 12 by the hook 69c which moves in the A1 direction together with the chain 65.
c indicates arrow A in FIG. 3 for the combined mold support device 47.
Start moving in one direction. Note that at the mold transfer position P2, the lock device 47c of the combined mold support device 47 is released, so that the movement of the sub-holder 12c in the direction of arrow A1 relative to the support device 47 is performed smoothly.

The sub-holder 12c that started moving by the hook 69c passes through the empty mold support device 45 positioned at the mold transfer position P2 of the chain conveyance device 36, and is further supported by the upper mold exchange device 16. Holding groove 1 of upper mold holder 12
Insert into 2b. The sub-holder 12c inserted into the upper mold holder 12 is further attached to the 25th part by the hook 69c.
Although the hook 69c is moved to the left in the figure, the position of the hook 69c, and therefore the position of the sub-holder 12c in the upper mold holder 12, is constantly calculated and detected as the amount of movement of the chain 65 by the mold transfer device control unit 82. If the mold transfer device control unit 82 determines that the two hooks 69c have reached the position where the sub-holder 12c is to be set, it enters step S23 of the first mold transfer program FMT, and starts the transfer chain. 6
Stop the drive motor that drives 5. Then, the sub-holder 12c with the partial upper mold 13a mounted thereon is positioned at a predetermined position in the upper mold holder 12, as shown in FIG. In this state, the drive of the shift cylinder 69e, which had been in the immediate operating state, is released.

Then, the transfer chain 65 moves the distance L7 up to that point.
FIG. 25 The downward shift state is released and the chain 65
moves back upward in FIG. 17 by a distance of 1L7, and along with this, the hook 69c of the transfer hook device 69 also moves upward in the figure, and the hook 6, which had been in the abutting and engaged state, moves upward in the figure.
The engagement state between 9c and sub-holder 12c is released. In addition, as shown in FIG. 20, the upper mold holder 12 is provided with a plurality of transfer rollers 12j in the holding groove 12b in a direction perpendicular to the plane of the paper, which can be moved freely, and a sub-holder 12c.
At the time of insertion, since the clamp cylinder 121 (is unclamped), the upper mold holder 1 of the sub-holder 12C
The insertion and setting operation to 2 is performed smoothly.

When the setting of the upper mold part 13a to the upper mold holder 12 is completed in this way, the process proceeds to step S24 of the first mold transfer program FMT, and the mold storage device control unit 83 drives the chain conveyance device 36. Then, the mold support device 45 to which the fixed-sized upper mold 49 used for processing is mounted is positioned at a predetermined mold transfer position P2. When the fixed-length upper mold 49 is positioned at the mold transfer position P2, step S25 is entered, and the chain conveyor 36 and the fixed-length upper mold 49 should be set as in the case of the partial upper mold 13a. The shift cylinder 69e@:II moves corresponding to the position, and as shown in FIG.
Then, the transfer chain 65 is driven again in the direction of arrow A1.

Then, the hook 69c of the transfer hook device 69 connects to the chain transport device t37 provided with one combination mold support device 47.
When passing through the mold transfer position P2, the chain 65 is located above the engagement protrusion 12i of the upper mold holder 12 supported by the support device 47 in FIG.
9c and the engagement protrusion 12i of the sub-holder 12c of the combination mold support device 47 positioned at the mold transfer position P2, but pass through as it is and move to the lower part of the chain conveyance device 36 in FIG. When the chain 65 is reached, the shift cylinder 69e and the chain 65 are shifted downward.

Then, the hook 69c abuts and engages the engaging protrusion 12i of the sub-holder 12c of the fixed length upper mold 49 positioned at the mold transfer position P2 of the chain conveying device 37, and as in the case described above, the fixed length upper mold 49 is Sub-holder 12c with upper mold 49 attached
is transferred to the main holder 12ai of the upper mold exchange device 16. The sub-holder 12c that supports the fixed length upper mold 49 is attached to the right end surface in FIG. When the contact occurs, the driving of the transfer chain 65 is stopped, and the driving of the shift cylinder 69a is also stopped, and the chain 65 is moved upward in the figure, and the fixed size upper mold transferred into the main holder 12a. The engagement state between the hook 69C and the engagement protrusion 12i of the sub-holder 12c supporting the sub-holder 12c is released. Then, the divided upper mold 13a and the regular length upper mold 49 are set in a continuous manner in the main holder 12a of the upper mold changing device 16, as shown in FIG.

In this way, when the split upper mold 13a and the fixed length upper mold 49 are set in the main holder 12a, the process proceeds to step S26 of the first mold transfer program FMT, and the previously assembled upper mold 13a and the fixed length upper mold 49 are set in the main holder 12a. upper mold 13
The combination mold support device 47 that holds b is similarly positioned at the mold transfer position P2. Then, the fixed length upper mold 49 on the chain transport device 36 side is transferred and the empty mold support device 45 and the partial upper mold 1 on the chain transport device 37 side are transferred.
As shown in FIG. 3, the main holder 12a into which the partial upper mold 13a and the fixed-length upper mold 49 are inserted and set is the combination mold support device 47° that holds the mold 3b, and the main holder 12a is moved at the transfer position P2 in the direction indicated by the arrow in the figure. The shape is aligned in the H and I directions.

In this state, the pair of shift cylinders 69e, 69e located on the rightmost side in FIG. 3 of one of the shift cylinders 69e in the combination mold support device 47 is driven, and the partial upper mold 13b of the main holder 12a is driven. The shift cylinder 69e provided at the position corresponding to the position to be mounted is driven, and the transfer chain 65 as a whole is moved from the combination mold support device 47 onto a portion of the upper mold holder 12, as shown in FIG. The distance to the position where the mold 13a is to be mounted is shifted downward by a distance L7.

In this state, move the transfer chain 65 in the A1 direction in FIG.
That is, rotate it in the positive direction. Then, the hook 69c of the transfer hook device 69 attached to the transfer chain 65 moves in the A1 direction together with the transfer chain 65, and the combined mold support device positioned at the mold transfer position P2 of the conveyance device 37 The main holder 12a abuts and engages with the engagement protrusion 12i of the sub-holder 12c holding the partial upper mold 13b held by the main holder 12a held by the upper partial mold 13b at the exchanger 16.
When the six-part upper mold 13b, which is moved to the position where it connects with the inner fixed-length upper mold 49, is connected to the fixed-length upper mold 49,
The movement operation by the transfer chain 65 is stopped, the shift state of the chain 65 is released, and step S27 in FIG. 30 is performed.
Then, the transfer operation is completed.

Also, regarding the lower mold changing device 17 of the automatic mold changing device 15, the mold supporting device 57 on which the unit lower mold 59 is attached is moved to the chain conveying device 56 in the same manner as the upper mold changing device 16. The predetermined number of unit lower molds 59 are positioned at a predetermined mold exchange position P3 shown in FIG.
The insert cell 1 is inserted into the empty main holder 7a of the lower mold changing device 17. By the way, is there a lower mold replacement bag? 1l17 is the same as the upper mold changing device 16 shown in FIG. 23, except that the standby position and the inverted position are upside down. Therefore, when inserting and setting the unit lower mold 59 into the main holder 7a, the driving cylinder 23 of the lower mold changing device 17 is moved as indicated by the arrow A in FIG.
The arms 21 and 22 are driven to protrude in two directions to the state shown in (3) in FIG. Replace the retainer 29.29 with the mold wP
3 and perform the replacement operation.

In this way, as shown in FIG. 27, the upper mold 13 used for processing is set in the upper mold exchange device 16, and the lower mold 11 used for processing is set in the lower mold exchange device 17. , the clamp cylinders 12k and 7C of each main holder 12a and 7a held by the exchanger 16.17 are driven to move each mold 13.11 into the main holder 12a and 7a.
Hold fixed against. Next, the main control unit 72 controls the 32nd
Step S28 of the mold supply program MSP shown in the figure is entered, and the upper mold holder 12 and lower mold holder 7, which have been completely set with the molds held in the respective exchange devices 16 and 17, are transferred to the press by the mold exchange operation. The upper mold holder 12 and the lower mold holder 7, on which the upper mold 13 and lower mold 11 to be replaced are mounted on the brake 1, are replaced in the following procedure.

That is, the main control unit 72 uses the system program memory 85
Then, a mold exchange control program MCP is read out, and a command is given to the mold exchange device control section 81 to perform a mold exchange operation with the press brake 1 side based on the program MCP. The mold changing device control unit 81 executes step S2 of the mold changing control program MCP shown in FIG.
In step 9, it is determined whether the transfer of the molds 13.11 to each main holder 12a, 7a held in the mold exchange device 16.17 has been completed, and it is determined that the transfer has been completed. If it is determined, step S30 is entered, and the drive cylinders 23 of each changing device 16, 17 are moved, and in the case of the upper mold changing device 16, the ram 23a is moved in the direction of arrow A3 in FIG. In the case of the lower mold changing device 17, the ram 23a is driven backward in the direction of arrow A4 in FIG. 2 to bring the arms 21 and 22 shown in FIG. 4 into a horizontal state.
Position to tool change position. Below, upper mold exchange device 1
6 will be explained only, but the status of each exchange device 16 and 17 is shown on the left side of FIG. 24 in a form corresponding to the numbers (1) to (3) in FIG. 23, to avoid redundant explanations. Omitted.

When the arms 21 and 22 are positioned at the tool exchange position in step S30 of the mold exchange control program MCP, the process proceeds to step S31, in which the sub-arm 26a is rotated 90' and the retainer that does not hold the upper mold holder 12 is moved. 2
9. Remove the sub-arm 26a on the side where 29 is attached (24th
In the figure, for convenience of explanation, two pairs of cages 29 are each shown as A.
and B, and among them, the cage 29 holding the upper mold holder 12 is surrounded by O. ) Position the upper mold holder 12 to be replaced, which is held by the upper mold support device 9 of the press brake 1, at a position facing the holder holder 12e on the side surface, as shown in FIG.

To do this, the drive motor 3° shown in FIG. 4 is rotated by a predetermined angle in a predetermined direction. Then, the rotation of the motor 30 is transmitted via the output shaft 30a to the shaft 25 supported by the arm 21 on the left side of FIG.
Gear 20c and timing belt 2 via hollow shaft 20b
The shaft 25 supported by the arm 22 on the right side of FIG. 4 by 9e
9 to each axis 25 by the same angle in the direction of arrow A5.
Rotate 0°. Then, due to the rotation of the shaft 25.25, the sub-arm 26 fixed to the sleeve 26 also rotates in the direction of arrow A5, and the retainer 29 on the side that does not hold the upper mold holder 12 at the upper part of FIG. It is positioned on the side surface of the upper mold holder 12 on the side of the press brake 1 shown in the figure.

In this way, when the sub-arm 26 is positioned horizontally, the holding pin 29a of the holder 29 on the press brake 1 side is moved to the holder 12 as shown in FIGS. 21 and 22.
The holding pins 29a and the holder retainers 12e are engaged with each other, and the upper mold holding holder 12 is attached to the retainers 29 on both sides.
．． At 29.

Hold as shown in FIG. In this state, step S32 in FIG. 24 is entered, and the drive cylinder 9d of the upper mold support device 9 on the press brake 1 side is driven to move the clamper 9c.
It is rotated in the direction of arrow G in FIG. 20 to release the upper mold holder 12 from being held by the clamper 9c. Then, the upper mold holder 12 is in a state where it can be pulled out in the direction of arrow C.
In this state, drive the drive cylinder 23 of the upper mold exchange device 16 to rotate the arms 21, 22 about the drive shaft 20 in the direction of arrow A6 in FIG. 2, and position them at a predetermined reversal position. . The holder 12 held by the retainer 29.29 has a rotary cylinder 29d provided with a retaining pin 29a rotatable relative to the retainer body 29f, and the timing belt 29C ensures that its posture is always constant. Since the holder 12 is held in such a manner that the sub-arm 2
Even when 6a rotates, the mold is always supported so as to face downward in FIG.

Next, step S33 is entered, and! F! The sub-arm 26a is rotated by 18° via the dynamic motor 30.

The upper mold holder 12 in which the upper mold was previously set is positioned below the upper mold support device 9 of the press brake 1, and the removed mold holder 12 is positioned at the rear of the machine body 2. In this state, step S34 is entered and the yA moving cylinder 23 is driven again to return the arms 21 and 22 to the horizontal state.Then, the upper mold holder is positioned below the upper mold support device 9 by reversing the sub-arm 26a. 12 engages with the upper part of the main holder 12a by fitting it into the holding groove 9b in the unclamped state from below in the figure, as shown in FIG. Therefore, in step S35 in FIG. 24, the drive cylinder 9d is driven to rotate the clamper 9c in the direction of the arrow F, and the upper mold holder 12 is securely held in the holding groove 9b. In this state, step S36 is entered, and the holding pin 29 of the retainer 29 that was holding the upper mold holder 12 is
a.

The upper mold holder 12 is released from being held by the retainer 29 by retreating in the direction of the arrow in FIG.

In this way, when the newly set upper mold 13 is set on the press brake 1, step S37 is entered, and the drive motor 30 is driven to move the upper mold holder 12, which was previously removed from the press brake 1 side, onto the arm 21. .22 is positioned below, and in this state, as shown in step S38, drive the drive cylinder 23 to move the arm 21.
of.

It is rotated in the direction of arrow A7 in FIG. 2 and positioned at a predetermined standby position. In this state, the replaced upper mold holder 12
is positioned at the transfer position P2 aligned with the upper mold storage device 33 in the directions of arrows H and I, as shown in FIG. 3, and the primary mold is returned to the storage device 33. Prepare for.

Note that the above-mentioned mold exchange operation is performed in the same way for the lower mold exchange device 17 as described above, but when removing the lower mold holder 7 from the lower mold support device 6,
The clamp cylinder 6b is driven to release the engagement between the base 6a and the main holder 7a, and in this state, the holder 7 is moved in the direction of arrow B using the exchange bag rI117,
Installation is done in the reverse order.

In this way, when the press brake 1 is equipped with the mold for processing the workpiece 86 shown in FIG.
O is read out, and the ram 5a is driven to move in the directions of arrows B and C in FIG. 20 via the ram control unit 79 based on the cutting program PR○, thereby performing a predetermined machining on the workpiece 86.

On the other hand, a fixed-size upper mold 49 attached to the upper mold holder 12 and the lower mold holder 7 removed from the press brake 1,
Split upper mold 50. The unit lower mold 59 needs to be returned and stored in each stopper mold storage device 33 and the lower mold storage device 35, but this operation is performed in step S39 of the mold supply program MSP shown in FIG. It will be done. Step S39
When executing, the second mold transfer program SMT shown in FIG. 31 is read from the system program memory 85 and executed by the mold transfer device control section 82 and the mold storage device control section 83. 2nd mold transfer program SMT
This is basically the reverse procedure of the first mold transfer program FMT shown in FIG.
Next, the chain conveying device 37 is driven to move the upper mold 13 held by the upper mold holder 12, for example in FIG. 36. The combination mold support device 47 that accommodates the partial upper mold 13b attached to the right end is positioned at a predetermined transfer position P2, and the transport device 36 is driven to move the partial upper mold to the transport device 37 side. Empty mold support device 4 for passing
5 to the transfer position P2.

In this state, steps S41 and S42 are entered, and the shift cylinder 69e of the upper mold transfer device 61 is appropriately driven to move the upper mold holder 12 positioned at the transfer position P2, as shown in FIG. The transfer chain 65 between the partial upper mold 13b and the conveyance device 37 is shifted downward by a distance fiL1 in FIG. Partial upper mold 13
b from the main holder 12a side via the empty mold support device 45 of the transport device 36, and stored in Wg47b of a predetermined combination mold support device 47 of the transport device 37. When the partial upper mold 13b is housed in the groove 47b of the predetermined combination mold support device 47 of the conveyance device 37, step 51 is performed.
oO, the locking device 47c shown in FIG. 15 is driven to fix and hold the partial upper mold 13b together with the sub-holder 12c in the groove 47b. Note that, as shown in FIG. 3, an auxiliary rail 91 is provided between the main holder 12a at the transfer position fiP2 and the transport device 36, 37.
Upper mold exchange device 16 and conveyance device 36 of sub-holder 12c
．． The movement between the sub-holders 12C and 37 is performed smoothly without the sub-holder 12C falling off.

When the partial upper mold 13b is stored in the chain conveyance device 37, steps 843 to S46 are entered;
The operation of storing the fixed length upper mold 49 in the main holder 12a begins. For this purpose, the conveying device 36 is driven to move the mold support device 45 that stores the fixed size upper mold 49 to the transfer position P2.
In step S44, as shown in FIG.

The transfer chain 65 between the fixed size upper mold 49 to be transferred in the main holder 12a and the mold support device 45 at the transfer position P2 of the transfer device 36 is shifted downward in the figure by a distance WI L7, and then In this state, drive the chain 65 in the direction of arrow A8,
The fixed size upper mold 49 in the main holder 12a is transferred into the mold support device 45 of the conveyance device 36 by the transfer hook device 69, and is fixedly held by the support device 45. The mold support device 45 also includes a sub-holder 12 similar to that shown in FIG.
Since locking device C is provided, mold support bag M4
The upper mold 49 of fixed length is held smoothly by the upper mold 49.

Next, the second mold transfer program SMT enters step S47 shown in FIG. The combination mold support device 46 that accommodates the partial upper mold 13a mounted on the right end in the figure is positioned at a predetermined transfer position P2, and the transport device 36 is driven to move one partial upper mold to the transport device 37 side. The empty mold support device 45 for passing through is positioned at the transfer position P2.

In this state, steps S48 and S49 are entered, and the shift cylinder 69e of the upper mold transfer device 61 is appropriately moved, so that the upper mold holder 12 is positioned at the transfer position P2, as shown in FIG. The chain 65 between the partial upper mold 13a and the conveying device 37 is shifted downward in the figure by a distance L7,
In this state, the transfer chain 65 is rotated in the direction of arrow A8, and the partial upper mold 13a is transferred from the main holder 12a side to the empty mold support device 45 of the transport device 36 by the transfer hook device 69. It is stored in the groove 47b of a predetermined combination mold support device 47 of the conveyance device 37.

Groove 47 of predetermined combination mold support device 47 of conveyance device 37
When the partial upper mold 13a is housed in the upper mold 13a, step S50 is entered, as shown in FIG. 15.

The locking device 47c is driven to fix and hold the partial upper mold 13a together with the sub-holder 12c in the groove 47b.

In this way, the upper mold changing device 16 of the automatic mold changing device 15
The upper mold 13 held in the main holder 12a is stored in the upper mold storage device 33, but at the same time, the upper mold 13 is held in the replaced lower mold holder 7 held in the lower mold exchange device 17. The lower mold 11 is also stored in a predetermined mold support device 59 in the lower mold storage device 35 by the lower mold transfer device 62 using the same procedure. Since the lower molds 11 are all formed from unit lower molds of the same size, the transfer operation thereof is substantially the same as that of the fixed-length upper mold 49 of the upper mold, so the explanation thereof will be omitted here.

Each partial upper mold 13 replaced from the press brake 1 and stored on the chain conveying device 37 side of the upper mold storage device 33
a and 13b are the mold supply program M shown in FIG.
In step S40 of SP.

Divided upper mold 5o forming each partial upper mold 13a, 13b
As a result, it is returned from the combined mold support device 47 to the divided mold support device 46 at the mold selection station 51, and the execution of the mold supply program MSP is completed. That is, when executing step S40, the main control unit 72 reads the mold return program MRP from the system program memory 85 and, based on the program MRP, instructs the mold selection station control unit 80 to return each of the split upper molds 50. Controls the return to the split mold support device 46.

That is, as shown in FIG. 29, in step S51, the mold return program MRP drives the chain conveyance device 37 to move the combination mold support device 47 supporting the partial upper mold 13a to be returned.

As shown in FIG. 5, position the mold at the mold supply position P1,
In step S52, one positioning pin device 8 shown in FIG.
9, the process proceeds to step S53.
The unclamp cylinder 90 shown in FIG. 5 is driven to release the holding state of each split mold 50 in the support device M47.

Next, in step S54, the drive cylinder 55i is driven to move the slide block 55h forward in the direction of arrow J.

Engagement portion 55r and engagement groove 55 of slide block 55h
m, an end-mounted mold 50□ constituting the partial upper mold 13a in the mold support device 47, and divided upper molds 503, 50. The engaging grooves 50b formed in the holding portions 50a of are aligned.

Next, the drive cylinder 55s of the slide block 55h is driven to raise all the sliders 55p in the direction of the arrow to bring them into an unclamped state.

In this state, the cart 55 is moved at low speed in the direction of arrow T in FIG. Then, the engaging portion 55r and the engaging groove 55 in the unclamped state at the tip of the slide block 55h
m is inserted into the engagement groove 50b of the split mold 50 held by the sub-holder 12 in a direction perpendicular to the plane of the paper in FIG.
In the process in which the engaging portion 55r of the slide block 55h moves rightward in FIG. 6 through the engaging groove 50b of the split upper mold 50 held in , split upper mold 50. ．． 50. The engagement groove 50 of the split upper mold 50 corresponds to the slider 55p that should hold the slider 55p.
When the rod 55u passes through the inside of the arrow M, the drive cylinder 55g is selectively moved to move the rod 55u backward in the direction of the arrow M.

Then, the slider 55p of the rod 55u retreats.

The split upper mold 50 moves in the direction of arrow M due to the elasticity of the coil spring 55q and corresponds to the engaging portion 55r of the slider 55p.
The engagement groove 50b is engaged, and the split upper mold 50 is held on the slide block 55h. The slide block 55h supports the 1-split upper mold 50 with the 1-split mold support device 46.
(However, in the same order and spacing as when supporting the split upper mold 50.

As shown in FIG. 5, the end mounting mold 5 is controlled to be held in the state shown in FIG.
o□1-split upper mold 50. ．． 50 is held in a symmetrical arrangement to the case where it is mounted and stored in the two-part mold support device 46. Split upper mold 50. ．． 50. And the cart 55 holding the end mounting mold 501 is shown in step 5 in FIG.
P52 continues to be driven to move in the direction of arrow T in FIG.
The combined mold support device 47 shown in FIG. 6 is driven until it reaches the retracted position EP on the right side in FIG. In addition, the end mounting mold 50□ and the split upper mold 503.50 of the sub-holder 12c
．． As already mentioned, since they are in the unclamped state by the unlamp cylinder 90, the split upper molds 506, 50, . The end fitting mold 5o can be smoothly moved in the direction of arrow T in FIG. 6 within the sub-holder 12c. In addition, partial upper mold 1
The arrangement order of each split upper mold 5o in 3a and the arrangement order of the split upper mold 5Q held by the slide block 55 kl will not change.
are arranged in contact with each other in the sub-holder 12c,
Since they are arranged apart from each other on the slide block 55h, the transfer operation of the split upper mold 50 by the slide block 55h is performed on the split upper mold 501 that constitutes the partial upper mold 13a in FIG. Mold 5031 then end mounting mold 50. are held and transferred onto the slide block 55h in this order.

In this way, when the trolley 55 reaches the retracted position MEP, the process proceeds to step 5P53 in FIG. 29, where the positioning pin 89 shown in FIG. 34 through a sprocket 42 in the direction of arrow J in FIG.
5.50. and a split mold support device 46 that accommodates the end-mounted mold 50□ (that is, the split mold support device 46 in which the split upper mold 50 was selected in step S2 of the mold supply program MSP shown in FIG. 32). is positioned at the mold supply position P1 of the divided mold selection station 51 shown in FIG. In addition, at this time, the split mold selection station 51
Since the trolley 55 is positioned at the retracted position EP on the right side of FIG.
6 etc. is carried out smoothly without any interference.

In this way, the split mold support device 46 moves to the predetermined mold supply position P.
1, step 5P55 is entered, and the mold storage device control section 83 moves to step 5P55.

Next, the positioning pin device 89 provided at the mold supply position P1 shown in FIG. 6 is driven into the mold support device 46, and the mold support device 46 is accurately positioned and held at the mold supply position P1. In step 5P56, the mold selection station control section 80 controls the drive cylinder 55i shown in FIG.
Move the slide block 55h in the direction of the arrow.
It is moved backward together with the transferred upper split mold 50, and the drive motor 55b of the mold selection station 51 is rotationally driven to move the trolley 55 on the guide rail 52a to the left in FIG. 6 via the timing belt 55c and the like. As shown in FIG. 5, the slide block 55h on the carriage 55 is positioned opposite the mold support device 46 positioned at the mold supply position P1.

When the slide block 55h faces the mold support device 46, step 5P57 is entered, and the portion of the split mold support device 46 where the split upper mold 50 is not mounted, therefore, the split upper mold 50 on the slide block 55h. The drive cylinder 55g on the truck 50 facing the location where the rod 55t is to be stored is selectively driven to project the rod 55t in the direction indicated by the arrow.

Then, the slider 46e of the mold supporting device 46 where no mold is currently held and the protruding rod 55t abut and engage, and the mold consisting of the engaging portion 46g and the retaining groove 46d in that region The holding means is selectively unclamped.

Therefore, the mold return program MRP is performed in step 5P5.
8, the drive cylinder 55i is driven to move the slide block 55h in the direction of arrow J, that is, toward the split mold support device 46 positioned at the mold supply position P1. Then, the split upper mold 50 held on the slide block 55h engages the unclamped engagement groove 46d and the engaging portion 46g of the split mold support device 46 with the side surface of the holding portion 50a of each split mold 50. The engagement groove 50b formed in is inserted into the engagement groove 50b.

As already mentioned, the arrangement of the split upper molds 50 on the split mold supporting device 46 and the slide block 55h is set symmetrically, so that the split upper molds 50 on the slide block 55h are arranged as one split mold. The upper split mold 50 is smoothly inserted into the vacant mounting portion of the mold support device 46 .

Next, in step 5P59, the drive of the drive cylinder 55g is released, and the end fitting mold 50 and the split upper mold 501.5o are removed.
The slider 46e corresponding to the slider 46e is driven in the direction of the arrow M in FIG. The rod 55U of the drive cylinder 55s on the 55h side is made to protrude in the direction indicated by the arrow, and the slider 55p is moved in the direction indicated by the arrow, and the divided upper mold 5 is separated by the slider 55P.
Release the support state of 0.

Next, in step 5P60 in FIG. 29, the drive cylinder 55i is driven to move the slide block 55h in the direction of the arrow, and the upper split mold 5° is moved to the split mold support device 46.
The carriage 55 is moved and driven in the direction of arrow S in FIG. 6 to return to a predetermined standby position WP on the left side of the figure, and the execution of the mold supply program MSP is completed.

(g) 0 According to the present invention, as described in detail, two or more types of teeth + skin L
A split mold support device 46 selectively and detachably holds split molds such as a split upper mold 50 having a split upper mold 50 in a predetermined arrangement order.
A second mold support means 47 such as a combination mold support device 47 having a first mold support means such as the like, and capable of holding at least one divided mold 50 among the divided molds 50.
and a mold support release means such as a drive cylinder 55g capable of selectively releasing the supporting state of the split mold of the first mold support means, the mold support release means being supported by the first mold support means. A mold selection transfer means such as a trolley 55 for selectively taking out divided molds from the first mold support means and transferring them to the second mold support means is connected to the first mold support. Since the split mold supported by the first mold support means is configured to be relatively movable between the means and the second mold support means, the divided mold supported by the first mold support means is selected by the mold selection transfer means. Appropriate I! for the second mold support means. Since it is transferred so as to form r width,
Molds having various tooth widths can be freely combined, and the press brake 1 can perform various types of processing.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a press brake to which an embodiment of the press brake mold selection and combination device according to the present invention is applied, and FIG. 2 is a perspective view showing an example of the automatic mold changing device to which an embodiment of the automatic mold changing device is applied. FIG. 3 is a side view showing one example of a press brake, and FIG. 3 is a view in the direction of the arrow ■ of the mold storage device in FIG. FIG. 4 is a plan view showing an example of the upper mold changing device, FIG. 5 is a screen view showing a mold selection station, and FIG. 6 is a front view of the mold selection station shown in FIG. 7 and 8 are views showing an example of a split mold mounted on a split mold holder, and FIG. 9 is a front view showing an example of a fixed length mold. FIG. 10 is a side view of FIG. 9, and FIG. 11 is a front view showing the split mold. FIG. 12 is a diagram showing the main parts of the mold transfer device. Fig. 13 is a diagram showing the shift cylinder; Fig. 14 is a side view of the shift cylinder; Fig. 15 is a diagram showing the locking device; Fig. 16 is a plan view of the transfer hook device; Fig. 17 is a plan view of the transfer hook device. front view. Fig. 18 is a front view showing details of the chain north movement mechanism, Fig. 19 is a side view of Fig. 18, Fig. 20 is a sectional view of the mold support device of the press rake, and Fig. 21 shows the mold holder and FIG. 22 is a view showing the engaged state of the mold changing device; FIG. 22 is a view taken along arrow A in FIG. 21; FIG. 23 is a diagram showing the operation of the mold changing device. FIG. 24 is a flowchart showing an example of a mold exchange control program and FIG. 1 showing the state of the mold exchange device at each step. FIGS. 25 to 27 are diagrams showing the shifting states of the chain during mold transfer. , FIG. 28 is a flowchart showing an example of a mold selection program, and FIG. 29 is a flowchart showing an example of a mold return program. FIG. 30 is a flowchart showing an example of the first mold transfer program; FIG. 31 is a flowchart showing an example of the second mold transfer program; FIG. 32 is a flowchart showing an example of the mold supply program; Figure 34 is a control block diagram showing an example of a press brake control system. Figure 34 is a perspective view showing a workpiece to be machined. Figure 35 is an example of a combination of upper molds for machining the workpiece shown in Figure 34. FIG. 36 is a diagram showing the machining state of the workpiece shown in FIG. 34. 1...Press brake 46...First mold support means (divided mold support device) 47...Second mold support means (combined mold support device) ) 5o...Split mold (split upper mold) 55...
・Mold selection transfer means (cart) 35g...Mold support release means (saliva cylinder) L5...Face width Applicant: Yamazaki Mazak Co., Ltd. Agent Patent attorney: Shinji Phase 1)

Claims (1)

[Scope of Claims] A first mold support means for selectively and detachably holding molds having two or more types of tooth widths in a predetermined arrangement order, at least one of the divided molds. a second mold support means capable of holding two molds, and a mold support release means capable of selectively releasing the supporting state of the split mold of the first mold support means; a mold selection transfer means for selectively taking out the divided molds supported by the first mold support means from the first mold support means and transferring them to the second mold support means; A press brake mold selection and combination device configured to be relatively movable between the first mold support means and the second mold support means.