JPH0244887Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a continuous bending machine. The edge of the workpiece is configured to be foldable with a wing beam that presses near the edge and rotates around the tip of the lower die, and also holds the edge of the workpiece near the edge between the wing beam and the wing die. The present invention relates to a bending machine that is capable of continuously bending at least two places with one machine by providing a plate material pressing member and a flat bending die.

(Conventional technology) To continuously bend two places with one machine,
In addition to the wing type, a Koki bending type is required.

By the way, when a workpiece, ie, a steel plate, is generally bent, a so-called hollowing phenomenon occurs in which the bending angle in the middle becomes larger than the bending angle at both ends.
This becomes more noticeable as the workpiece becomes thicker or longer.

As a countermeasure to this, up until now, a back-up mechanism has been attached to the lower frame side to support the bending reaction force applied to the wing member at a position along the rotating end path of the wing beam, and a
The method was to attach a back-up mechanism to the back of the movable blade (wing type) with a gap that would allow the insertion of the blade (Japanese Patent Publication No. 60-31570).

(Problems to be Solved by the Invention) In the case of using the above method, a back-up mechanism of the Koki-bending type is required separately from the wing-beam back-up mechanism, which increases the size of the machine. In addition, as a result of the reaction force when bending is applied to the rotating support shaft of the wing beam, there is play in the shaft support, and in some cases, there are problems such as damage. Since the reaction force is also applied to the wing hydraulic cylinder, this hydraulic cylinder must be made with high power, which poses the problem of increasing the size of the machine.

The present invention was made in view of these conventional problems, and aims to provide a continuous folding machine that can reduce the size of the machine, save energy, and further improve the folding accuracy.

(Means for solving the problem) The structure of the present invention to achieve the above purpose is as follows:
To explain using FIGS. 1 to 7 corresponding to the embodiment, the present invention has a vertical plate 33 integrally attached to the front surface of a lower frame 31, which is the main body of the bending machine, and Wing beam 9 side,
A circular arc surface 34 along the rotation end path of the wing beam
The arcuate surface 34 supports the bending reaction force applied to the wing beam 9 during wing bending, and the vertical plate 33 has an upper end 37
A reaction force receiving member 38 is provided to protrude upward from the front end 38, and the front end 38 is further provided on the front side of the KOKI bending die 17 when the KOKI bending die 17 descends during the KOKI bending action.
By providing an arm 39 whose part 9a is in contact with the back surface 38a of the reaction force receiving member 38, the bending reaction force applied to the bending die 17 during bending is supported.

(Function) To continuously fold and bend the workpiece, the workpiece W set in advance is placed between the upper mold 8 and the plate material holding member 2.
Press from above with 6. Subsequently, the footjob bending type is performed by lowering the footjob bending type. At this time arm 3
The front end 39a of 9 is the back surface 38a of the reaction force receiving member 38.
Since it is in contact with the arm 39, the component force in the normal or horizontal direction that is applied to the bending mold during bending is transferred to the arm 39.
It is supported by the reaction force receiving member 38 and the vertical plate 33 via.

After completing the Koki bending, to perform the second bending, the upper die 8
Then, the plate holding member 26 is raised one step to set the work at the second bending position, and only the upper die 8 is lowered to hold the work with the lower die 7. Subsequently, the wing beam 9 is swung to bend the workpiece at right angles with the wing die 11. At this time, as the wing beam 9 swings, the rolling wheels 35 move toward the arcuate surface 34 of the vertical plate 33.
Since the wing beam 9 rolls on the top, the component force in the normal direction or horizontal direction during the swing of the wing beam 9 is supported by the vertical plate 33.

In this way, the back-up mechanisms 30, 36,
In other words, it is supported by a vertical plate 33 that is integrally attached to the lower frame 31 of the machine and a reaction force receiving member 38 that is integrally provided to the vertical plate 33, so that it can be attached to the wing beam rotation shaft or the wing hydraulic cylinder. No unnecessary load is applied, and the wing beam back-up mechanism itself can be used as the back-up mechanism.

(Embodiment) Next, an embodiment of the present invention will be described based on the description of the drawings. As shown in FIGS. 1 and 2, a bed 2 is horizontally suspended between side frames 1 and 1, and Guides 3, 3 are provided, and a ram 5 that moves up and down is supported by a plurality of hydraulic cylinders 4. The hydraulic cylinders 4 are attached to an upper frame 6 extending between the upper ends of the side frames 1, 1.

A lower die 7 is attached to the upper end of the bed, while an upper die 8 serving as a workpiece holder is attached to the lower end of the ram.

The side frames 1, 1 support a shaft 10, which is the center of rotation of the wing beam 9, and a lower die 7 and an upper die 8.
A wing beam 9 is made to be able to rotate around the mold tip of the wing beam 9, and a wing mold 11 is provided at the upper end of the wing beam 9, and the tip of a piston rod 13 of a wing hydraulic cylinder 12 is pin-jointed at the lower part. . Several hydraulic cylinders 12 are arranged at intervals along the longitudinal direction of the wing beam 9.

Several hydraulic cylinders 14 are provided at intervals along the longitudinal direction of the ram 5 on the front surface of the ram 5 with piston rods 15 facing downward, and a support member 1 of a bending type is attached to the tips of these piston rods 15.
6 is attached to the lower end of the supporting member.
Install. The support member 16 is guided by guides 18 provided on both sides of the front surface of the ram. In addition, as shown in FIGS. 2 and 6, elongated hole guides 19 are installed vertically at appropriate intervals in the longitudinally intermediate portion of the support member 1.
6, and a guide piece 2 is provided in this elongated hole guide 19.
0... and fixed it to the front surface of the ram 5 with bolts 22... along with the support plate 21... which is attached to the front surface of the support member 16, and also the upper part of the support member 16 at the upper end of this support plate 21... In spacer 23...
and bolts 24... to secure it to the front of the ram 5.

As shown in FIGS. 3 to 5, locking members 25, 25 are provided at the lower ends of both sides of the support member 16, with locking portions 24, 24 facing the upper mold 8 side. The locking members 25, 25 have a left-right inverted L-shape when viewed from the side.

On the other hand, plate material pressing members 26, 26 are provided at the lower ends of both left and right sides of the ram 5, on the front side of the upper die 8. The plate material pressing members 26, 26 are pivotably connected to horizontal support shafts 27, 27 provided at the upper ends on the ram 5 side so as to be freely swingable. Further, a pin 28 serving as an engaging member is provided at a position slightly closer to the tip side than the pivot point and on the front side with an axis parallel to the horizontal support shafts 27, 27. The pin 28 is formed by integrally protruding from the side surfaces of cubic base materials 29, 29, and is provided by fixing the base materials 29, 29 to the plate material holding member 26. The pin 28 is dimensioned so as to enter into the vertical movement path of the tips of the locking members 24, 24,
As shown in the figure, when the Koki bending mold 17 is raised by the operation of the hydraulic cylinders 14..., the locking member 2
5 and 25 and is lifted upward, moving the plate material holding member 26 upwards, and conversely, when the rods 15 of the hydraulic cylinders 14 extend, they sequentially move downward and finally the locking members 25, 25 is released (that is, the support member 16 of the Koki bending type moves further downward), and the plate material pressing member 26 assumes a vertical posture.

On the other hand, the rotation path of the wing beam 9 includes the first,
As shown in FIG. 2, a plurality of backup mechanisms 30 are provided at predetermined intervals on the front side of the wing beam 9 in order to back up the reaction force during the bending action. The back-up mechanism 30 is formed of a vertical plate 33 erected on an overhanging frame 32 integrally provided at predetermined intervals in front of a lower frame 31, and the wing beam 9 side is connected to the rotation of the beam 9. It is formed into a circular arc surface 34 along the moving end path. Further, on the lower rear surface of the wing beam 9, a number of roller wheels 35 corresponding to the horizontal plates 33 are provided, the lower circumferential surface of which protrudes slightly below the lower end of the beam 9. When the piston rod 13 of the hydraulic cylinder 12... is extended,
This rolling wheel 35... is the circular arc surface 34 of the vertical plate 33...
...Rolling on top.

Further, the following back-up mechanisms 36 for the bending molds 17 are provided at the upper ends of the vertical plates 33. This back-up mechanism 36 ... bends the upper end 37 ... of the vertical plate 33 ...
A reaction force receiving member 38 is formed parallel to the lower surface 16a of the vertical plate 6, and is integrally provided on the front surface of the vertical plate 33, and projects above the upper end 37 of the vertical plate. It is formed by integrally protruding a number of arms 39 that correspond to the vertical plates 33 forward from the front lower end of the member 16, and the hydraulic cylinders 14 for raising and lowering the Koki bending die 17. When the piston rods 15 are extended, the arms 39 are supported by the upper ends 37 of the vertical plates 33, and the front ends 39a of the arms 39 are brought into contact with the back surfaces 38a of the reaction force receiving members 38 and supported. This counteracts the bending reaction force exerted on the member 16.

Next, the effect of continuous bending in the above embodiment will be explained based on FIGS. 7A to 7D.

First, from the state shown in Fig. 7A and (Figs. 1 and 3), operate the hydraulic cylinders 14...
After releasing the engagement between the cylinders 5 and 25 and setting the plate material pressing member 26 in a vertical position, the operation of the cylinders 14 is temporarily stopped.

Next, as shown in FIG. 4, the hydraulic cylinders 4 are operated to move the ram 5 downward, and the workpiece W, which has already been inserted onto the lower die 7, is moved together with the upper die 8 by the plate material holding member 26. The presser and then the cylinders 14 are operated again to move the support member 16 for bending die downwards, and the bending die 17 performs the bending.

In this bending, the arm 39... is the vertical plate 33...
Since the workpiece W is bent while being supported by the upper end surface and its front end 39a is in contact with the back surface a of the reaction force receiving member 38, the vertical component of the bending reaction force of the workpiece W is applied to the wing mold 11 and the plate material. It is supported by the locking action of the holding member 26, and the component force in the normal or horizontal direction is supported by the back-up mechanism 36 made up of the arm 39 and the reaction force receiving member 38.

After being bent in this way, the piston rods 15 of the hydraulic cylinders 14 are bent as shown in C.
is retired and the Koki bending type supporting member 16 is moved upward. Due to the upward movement of this support member 16, the engaging member 2
5 and 25 scoop up the engaging member (pin) 28 from below, rotate the plate material holding member 26 upward about the horizontal support shaft 27, and also move the hydraulic cylinder 4...
The piston rod 4a is retired, the ram 5 is moved upward, and the hold on the one-way workpiece is released. Next, as shown in D, after setting the bending allowance using a back gauge (imaginary line in the figure), the hydraulic cylinder 4 is operated again to move the ram 5 downward, and the workpiece W is moved between the upper die 8 and the lower die 7. The presser presser then operates the wing hydraulic cylinder 12 to rotate the wing beam 9 around the tips of the upper and lower molds to bend the workpiece W at right angles.

In this wing bending, the rolling wheels 35... are connected to the vertical plate 33.
Since it rolls on the arcuate surface 34... of the wing beam 9, the vertical component of the bending reaction force of the workpiece W generated by the rotation of the wing beam 9 is supported by the locking mechanism of the upper mold 8, and the wing beam 9 The component force in the normal direction or horizontal direction during the rotation of the vertical plate 3 is
3... is supported by a backup mechanism 30.

After the bending is completed, the hydraulic cylinder 4 is operated to move the ram 5 upward and the workpiece W is taken out.

The workpiece W is bent at right angles by the first stage of flat bending, and is further bent at a second stage in the opposite direction with a predetermined width.

As mentioned above, since both the corner bending and the wing bending are supported by their respective back-up mechanisms, the wing shape can be bent in the longitudinal direction, and the bending can be performed with high precision over the entire length without causing any bending. can.

(Effects of the invention) As can be understood from the description of the embodiments above, the present invention is capable of effectively absorbing the bending reaction force of the workpiece W generated during Koki bending and wing bending through the vertical plate and the reaction force receiving member. Since it is supported by the lower frame, which has a rigid structure, strong reaction force support is possible, and the bending angle of the workpiece can be made uniform with high precision, and the bending reaction force is not applied to the wing beam or wing hydraulic cylinder. As a result, there is no need to create play in the bearing of the wing beam's rotating shaft or use high power, that is, large hydraulic cylinders, as in the past, allowing for even higher precision bending and machine control. It enables miniaturization and is also advantageous in terms of energy saving. Furthermore, the two backup mechanisms 30 and 36 are constructed by using vertical plates, which has the advantage that the structure of the machine can be simplified and the machine can be further miniaturized compared to the conventional one.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway overall side view showing an embodiment of the present invention, FIG. 2 is a partially cutaway overall front view thereof,
FIG. 3 is an enlarged side view of the main parts, FIG. 4 is an enlarged side view showing its operating state, FIG. 5 is a perspective view of the plate holding member, and FIG. 6 is an enlarged sectional view showing the Koki bending type support member. FIGS. 7A to 7D are explanatory diagrams of the operation. Code explanation, 2...Bet, 5...Ram, 7...
Lower mold, 8... Upper mold, 9... Wing beam, 10
...Axis, 11...Wing type, 14...Hydraulic cylinder, 15...Piston rod, 16...Koki bending type support member, 17...Koki bending type, 16...Plate material pressing member, 30...Wing beam Backup mechanism, 31... Lower frame, 32... Overhanging frame, 33... Vertical plate, 34... Arc surface, 3
5...Rolling wheel, 36...Koki bending type back-up mechanism, 37...Upper end of vertical plate, 38...Reaction force receiving member, 38a...Back surface of reaction force receiving member, 39...
Arm, 39a... Front end of arm, W... Work.

Claims (1)

[Scope of utility model registration request] The lower die 7 on the upper surface of the bed and the upper die 8 at the lower end of the ram hold down the vicinity of the edge of the workpiece W, and the edge of the workpiece W can be bent by a wing beam 9 that rotates around the tip of the lower die 7. At the same time, a continuous bending machine is provided with a plate holding member 26 that presses the vicinity of the end of the work W between the wing mold 11 of the wing beam 9 and a flat bending mold 17 that is forcibly moved up and down by the ram 5. In the machine, on the front of the lower frame 31,
A vertical plate 3 having circular arc surfaces 34 along the rotation end path of the wing beam 9 at predetermined intervals.
3... are integrally provided to form a back-up mechanism 30 that supports the bending reaction force applied to the wing beam,
A reaction force receiving member 38 provided on the vertical plate 33 so as to protrude above its upper end 37 and a small bending mold 1
The continuous folding mechanism is characterized in that a back-up mechanism 36 of the back-up bending type is formed by an arm 39 which is integrally provided on the front side of the front side of the back-up mechanism 7 and comes into contact with the reaction force receiving member 38 during the back-up bending action. Bending reaction force support device for bending machines.