JPH01103202A - Complex working machine tool - Google Patents

Abstract

PURPOSE:To simplify the control procedures and constitution of a handling means by installing the first and second work holding means onto the first and second spindle stocks and installing the first and second handling means so as to form pairs with the first and second spindle stocks. CONSTITUTION:When a ling work 31 is worked, the work 31 is held by the work holding parts 19 and 19 of the first and second work handling means 9A and 9B, and the holding parts 19 and 19 in this state are shifted synchronously, and the work 31 is positioned between the first and second spindle stocks 3 and 5. Further, in this state, the spindle stocks 3 and 5 are shifted in the Z-axis direction, and the workpiece 31 is held by the first and second work holding means 3b and 5b. In other words, since a variety of operations can be executed by using the work handling means 9A and 9B which are not provided with the function for the shifting in the Z-axis direction in dependently or in common, the control procedures and constitution of the handling means 9A and 9B can be simplified accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention relates to the mounting of a workpiece to two headstocks facing each other using a workpiece handling means that does not have a movement function in the Z-axis direction; It is possible to remove the workpiece and also transfer the workpiece between the headstocks. Regarding multi-tasking machine tools.

(b), Prior Art Normally, in a multi-tasking machine tool having two headstocks facing each other, in order to machine a workpiece, the workpiece is attached to one of the headstocks via a chuck, and then the first Perform the processing of the process, and.

After the first process is completed, the workpiece is transferred to the chuck attached to the other headstock, and after the transfer is completed, the second process is performed on the workpiece that has undergone the first process, and after the second process is completed. , the processed workpiece is removed from the chuck and transported to the machine. At this time, the attachment and detachment of the workpiece and the transfer of the workpiece are performed using a workpiece handling means such as a loading device that is provided so as to be freely movable and driven in the Z-axis direction. However, in this case, the workpiece handling means must have a function of moving in the Z-axis direction to attach the workpiece to the headstock or remove the workpiece from the headstock, and the control procedure and control procedure of the handling means are therefore indispensable. There was a Fubukai whose composition became complex.

Furthermore, when the workpiece handling means moves in the Z-axis direction, it tends to collide with one worker, which poses a safety problem. Also,
What is the control procedure and configuration of the work handling means? Jhi
It is possible to hold a long workpiece between two headstocks or remove it from between two headstocks without turning the workpiece into a LT or moving it in the Z-axis direction, and even when cutting off a workpiece. It is desired to develop a handling technique that can also hold the workpiece.

In view of the above circumstances, 1 the present invention utilizes first and second workpiece handling means that do not have the function of moving in the Z-axis direction, either alone or in combination, to handle various workpieces on two headstocks facing each other. It is possible to attach, remove, hold the workpiece during parting, etc., and also transfer the workpiece between the headstocks and process the workpiece.
In addition, a bar feeder is used to transfer workpieces between the S headstocks, and only the second workpiece handling means is used to carry out processed workpieces to continue machining, making it possible to process a wide range of workpieces. can be made to do so. The purpose is to provide multi-tasking machine tools.

(d) Means for solving the 0-interval point, that is, 1 the present invention provides first and second headstocks (3, 5) that face each other and are provided so as to be movable and driveable in the ZI111 direction.
and a first workpiece holding means (3b) is attached to the first headstock (3).

A second work holding means (5b) is mounted on the second headstock (5).
), a first work handling means (9A) is provided in a pair with the first headstock (3), and a second work handling means (9B) is installed on the second workpiece handling means (9B).
A workpiece holding portion (19) is provided in the first workpiece handling means (9A) to be paired with the headstock (5) of A first work transfer position (x) facing the means (3b)
2) is provided so that it can be freely moved and driven.

The work holding part (19) is placed in the second work handling means (9B) at the second standby position 1! (X3) and the second workpiece transfer position (x4) facing the second workpiece holding means (5b).

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

This description is not limited to the description on the drawings.
The same applies to the column "r (eel, effect)" below.

(e) Zero effect With the above configuration, the workpiece (3) is mounted on the first headstock (3).
1), grip the workpiece (31) on the workpiece holding part (19) of the first workhand link means (9A), and in that state move the workpiece holding part (19) to the first standby position. ! (Xi) to move the workpiece (31) to the first workpiece transfer position (x2), and in that state, move the first headstock (3) to the first workpiece holding means (Xi). 3b) together with the first work handling means (9A
) to move the workpiece (31) in the Z-axis direction toward the workpiece holding section (19) and deliver the workpiece (31) to the workpiece holding means (3b).

Furthermore, when removing the workpiece (31) from the second headstock (5), the workpiece holding part (19) of the second workpiece handling means (9B) is moved and driven to the second workpiece transfer position II ( X4), and in that state, move the second headstock (5) together with the workpiece (31) towards the workpiece holding part (19) of the second hand link means (9th) Z@
direction and place the workpiece (
31) Acts to deliver and receive.

Furthermore, the first headstock (3) and the first and second headstocks (5)
When transferring the workpiece (31) to the first headstock (31),
) and the second headstock (5) are brought close to each other so that the workpiece (31) held by the first workpiece holding means (3b) is transferred to the second workpiece holding means (5b). act.

Furthermore, when processing a long workpiece (31), the workpiece (31) is transferred to the first and second workpiece handling means (9).
A, 9B) are gripped by the workpiece holding parts (19, 19), and in this state, the workpiece holding parts (19, 19) are moved synchronously to move the workpiece (31) to the first and second spindles. The first and second headstocks (3, 5) are then moved in the Z-axis direction to approach the workpiece (31). And the second work holding means (3b, 5b) acts to hold the work (3L).

Furthermore, first and second work holding means (3b) are provided.

5b), when cutting off the workpieces (31, 31) held by the first and second workpiece handling means (
9A, 9B) are respectively positioned at the first work transfer position (X2) and the second work transfer position (x4), and in that state, each work holding section (19, 19) is ), the workpiece (31
, 31) so as to be rotatably supported.

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

Fig. 1 is a front view showing an embodiment of a multi-tasking machine tool according to the present invention, Fig. 2 is a left side view of Fig. 1, and Fig. 3 is a loading device installed on the multi-tasking machine tool shown in Fig. 1. FIG. 2 is a front view showing the device.

FIG. 4 is a diagram showing the main parts of the loading device.

5 to 13 are process diagrams showing how a workpiece is processed using an embodiment of the present invention.

14 to 19 are process diagrams showing how a long workpiece is processed using an embodiment of the present invention, and FIG. 20 is a diagram showing another example of a hand with a loading percentage of 11.

The multi-tasking machine tool 1 has a body 2, as shown in the first @, and a headstock 3.5 on the body 2. Nine spindles are provided on the headstock 3-15, which will be described later. The shafts 3a and 5a face each other with their axes CTI and Cr2 aligned, and are movably driven in the directions of arrows A and B (ie, the Z-axis direction).

The headstocks 3 and 5 have spindles 3a and 5a, respectively.
Arrows C and D centering on the respective axes CTI and Cr2.
The spindles 3a and 5a are equipped with chucks 3b and 5b, respectively.

Also, on 1 aircraft 2, as shown in Figure 2.

There are two carriages 6a (only one is shown in FIG. 2) that constitute the tool rests 6, 6 provided corresponding to the respective spindles 3a, 5a, and one
The carriages 6a shown in FIG. The turret main body 6b is provided in such a manner that it can move freely in the directions of arrows A and B, that is, in the directions of arrows E and F that are perpendicular to the Z-axis direction. A turret-type tool mounting portion 6C on which a tool can be mounted is provided in a form that can be freely driven one rotation.

By the way, two loading devices 119A and 9B are mounted on the headstock 3.5 on the front surface 2c of the fuselage 2 in the li1 diagram.
It is installed in a pair with the loading device [9A
, 9B has a body 10, an arm 17, a θ hand 19, and the like. That is, a body 10 is attached to the front surface 2c of the fuselage 2 shown in FIG. 3, and the body 10 has a box-shaped casing 11. Casing I
Inside L, an arm rotation cylinder 12 is pivotally mounted via a pin L2c, and a rod 12a is supported on the arm rotation cylinder 12 in a manner that it can protrude and retract in the directions of arrows G and H. . A connecting member 12'b is attached to the tip of the rod L2a in the figure, and a lever support part 11a of the casing 11 is provided diagonally above the right side of the arm rotation cylinder 12 in Figure 3. Lever support part 1
In 1a.

The lever 13 moves in the direction of arrow 1 through the bin 13b. The lever 13 is supported so as to be able to freely pivot in the J direction, and a connecting member 12b attached to the rod 12a of the arm pivoting cylinder 12 is located at the center of the lever 13 in FIG.

It is pivotally connected via the bin 13a. Furthermore, lever 13
A roller 13c is rotatably provided at the right end in the figure.

Further, a bearing part 1], b of the casing 11 is provided above the arm rotation cylinder 12 in FIG. As shown, the right end portion 15b in the drawing projects outside the casing 11, and is supported in a manner that it can freely rotate in the L direction in the direction of the arrow about the axis CT3 of the shaft 15. Engagement shaft 1
A retaining member 16 is attached to the left end portion 15a of FIG. It is provided so as to protrude in a direction perpendicular to the axis CT3 of the engagement shaft 15. The plate L6b has an engagement groove 1.
6c is bored toward the axis CT3 of the engagement @15, and the roller 13c of the lever 13 is fitted into and engaged with the engagement groove 16c in a freely rolling manner. - Also, on the right end 15b of the engagement shaft 15 in FIG.
7 is attached to the arm 17 so as to be able to swing in the L direction in the direction of the arrow along with the engagement @ 15, and a hand 19 is provided at the tip of the arm 17 in FIG.

The hand 19 has a main body 20 formed in a 1M shape, and the main body 20 includes claws 21a for gripping a workpiece,
21b is provided. The claw parts 21a, 21b are connected to drive cylinders 22A, 22B and claws 25a, 25, respectively.
b, etc., and two drive cylinders 22A, 22B.
is provided within the main body 20. Drive cylinder 22A
, 22B is.

Each has a support rod 22a, a piston 22b, a cylinder 22c, etc., and drive cylinders 22A, 22B.
The support rods 22a, 22a each have one end of the support rod 22a in FIG.
, are provided in a form connected to the lower side plate 20b. A piston 22b is fixed to the center of each support rod 22a, and a cylinder 22c is attached to the inner peripheral surface of each support rod 22a.
The support rod 22a is movable in the vertical direction in FIG. 3 along the support rod 22a while being in sliding contact with the support rod 22a.

Inside the cylinders 22c, 22c, oil chambers 22d are formed to cover the support rods 22a, and the head portion 22e and bottom portion 22 of each cylinder 22c are
In f, each pipe (not shown) is connected to a hydraulic system.
is connected to the oil chamber 22d in such a manner that pressure oil can be supplied thereto.

Note that the third WI of the cylinder 22c of the drive cylinder 22A
A plurality of teeth 22g are formed at predetermined intervals in the directions of arrows M and N on the lower side surface, and these teeth are 922g.
A gear 27 is engaged with the gear 27, which is provided so as to rotate freely once.

Furthermore, a support rod 23 formed in an inverted J shape is provided on the upper side surface of the cylinder 22c of the drive cylinder 22A in FIG. The support rod 23 has a bent portion 23a with 9
It is formed to protrude from the main body 20 in the direction of arrow N. A claw 25a- is provided at the tip of the bent portion 23a in the drawing, and a workpiece holding portion 25c is formed in the claw 25a in a V-shape in a direction perpendicular to the plane of the third drawing.

Further, a support rod 26 is provided on the upper side surface of the cylinder 22c of the drive cylinder 22B in FIG. 25b.

It protrudes from the main body 20 in the direction of arrow N and is attached to face the claw 25a. A workpiece holding portion 25c is formed in the claw 25b in a V-shape in a direction perpendicular to the plane of FIG. A portion 26a is provided facing 1lIX27.

Note that the single stepped portion 26a has a plurality of teeth 26b indicated by arrows M,
The teeth 26b are formed at predetermined intervals in the N direction.
meshes with gear 27.

Furthermore, the machine body 2 of the multitasking machine tool 1 shown in FIG.
A cover 35 is provided to cover the machine body 2, and bar feeders 43, 43 are provided on both left and right sides of the mating machine tool t in FIG.

The chucks 3b and 5b are provided with bar work, respectively, through the main shafts 3a and 5a.

Since the multi-tasking machine tool 1 has one or more configurations, in order to machine a workpiece, the workpiece 31 to be machined is first mounted on the chuck 3b using the loading device 1f9A on the left side of FIG. To do this, the operator inserts the workpiece 31 between the claws 25a and 25b of the hand 19 positioned at the standby position X1 shown by the solid line in FIG. ) to drive the third
Pressure oil is supplied into the cylinder 22c from the bottom part 22f side of the drive cylinder 22A shown in the figure, and the pressure oil in the oil chamber 22d is drained from the rad part 22e side. Also,
At the same time, pressure oil is supplied into the cylinder 22c from the head portion 22e side of the drive cylinder 22B, and the oil chamber 2
The pressure oil in 2d is drained from the bottom part 22f side. Then, the cylinder 22c of the drive cylinder 22A is pushed down together with the support rod 23 by the supplied pressure oil.

It meshes with the gear 27 and moves in the direction of arrow M along the support rod 22ak while its inner circumferential surface in FIG. 3 is in sliding contact with the piston 22b. At the same time, the drive cylinder 22B
The cylinder 22c is pushed up by the supplied pressure oil together with the support rod 26, meshing with the gear 27, and sliding along the support rod 22a with its inner peripheral surface in FIG. 3 in sliding contact with the piston 22b. and move in the direction of arrow N. Then, the nine claws 25a attached to the support rod 23 move in the direction of arrow M in FIG.
The claw 25 attached to the support rod 26 moves in the direction
b moves in the direction of arrow N, and workpiece 3 is moved by claws 25a, 2
5b and held in a round shape. In addition, winter melon 2
5a and 25b move synchronously at a constant speed in the directions of arrows M and N under the action of tooth $27 and teeth 22g and 26b. Therefore, the workpiece 31 is accurately gripped by the claws 25a and 25b at intermediate positions in the directions of the arrows M and N.

In this way, when the workpiece 31 is gripped by the loading device 9A as shown in FIG. 5, the arm of the loading device 5t9A shown in FIG. i Drive the two-time cylinder 12 to connect the rod 12a to the connecting member 12.
b, and move it backward in the direction of arrow H, and position it at the position shown by the solid line in the figure. Then, the lever 13 connects the connecting member 12
It turns in the direction of arrow J about the bottle 13b while being pulled by b. When the lever 13 turns in the direction of arrow J, the nine rollers 1 provided at the right end of the lever 13 in the figure
3c also rotates in the direction of arrow J while rolling within the engagement groove 16c formed in the engagement member 16. Then, the engaging member 1
6 is pressed downward in the figure by the roller 13c, and turns together with the engagement shaft 15 in the direction of the arrow around the axis CT3 of the shaft 15. As a result, the hand 19, while gripping the workpiece 31, swings in the direction of the arrow via the arm 17 and is positioned at the workpiece transfer position X2 facing the chuck 3b shown in FIG.

Next, open the chuck 3b, and in that state, move the headstock 3 to the 2nd position.
A drive motor (not shown) for driving in the @ direction (directions of arrows A and B) is driven with low torque to move the headstock 3 together with the chuck 3b in the direction of arrow B toward the hand 19. Then.

The chuck 3b contacts the left end of the workpiece 31 held by the hand 19 in FIG. 6, and further presses the workpiece 31 in the direction of arrow B. At this time, the drive motor 3 that moves the headstock 3 in the direction of arrow B is.

Since it is driven with low torque, the headstock 3 is connected to the chuck 3.
The force that presses the workpiece 31 in the direction of arrow B through b is weak, and the force does not deform the hunt 19 or the like.

When the workpiece 31 is pressed against the chuck 3b in this way, the chuck 3b is closed and the workpiece 31 is held by the chuck 3b.
Pressure oil is supplied from the bottom part 22f of the driving cylinder 22B into each cylinder 22c, and the pressure oil that was previously supplied into the cylinder 22c is transferred to the bottom part 22f of the driving cylinder 22A and the head of the driving cylinder 22B. It drains through the section 22g. Then, drive cylinder 2
The cylinder 22c of 2A, together with the support rod 23, is pushed up by the pressure oil supplied into the cylinder 22c and meshes with both arms 27, and its inner peripheral surface in FIG. 3 is in sliding contact with the piston 22b. , moves in the direction of arrow N along the support rod 22a. At the same time, the drive cylinder 22
The cylinder 22C of B is pushed together with the support rod 26 by the supplied pressure oil and meshes with the gear 27.
and.

It moves in the direction of arrow M along the support rod 22a while its inner periphery in FIG. 3 is in sliding contact with the piston 22b.

Then, the claws 25a and 25b synchronously move in the direction of arrow N.

The workpiece 31 is moved in the direction M, and the gripping relationship between the workpiece 31 and the claws 25a and 25b is released.

In this way, the work 31 is held by the chuck 3b shown in FIG. 6, and the work 31 and the rope ink device 5g9
When the grip of the hand 19 of A is released, the drive motor for moving the headstock 3 in the 21M direction is driven to move the headstock 3.

Together with the chuck 3b, it is moved a predetermined distance in the direction away from the D"-" door 19, that is, in the direction indicated by the arrow. Furthermore,
In this state, the arm rotation cylinder 12 shown in FIG. 3 is driven to cause the rod 12a to protrude in the direction of arrow G together with the connecting member i2b. Then, the lever 13 is pushed by the connecting member 12b and pivots in the direction of arrow 1 about the bottle 13b. When the lever 13 turns in the direction of the arrow, the roller 13c of the lever 13 also turns in the direction of the arrow while rolling within the engagement groove 16c of the engagement member 16.

Then, the engaging member 16 is pushed upward in the figure by the roller 13 (:), and turns together with the engaging shaft 15 in the direction indicated by the arrow around the axis CT3 of the shaft 15. The hand 19 swings in the direction of the arrow via the arm 17 and is positioned at the T standby position X1 shown by the solid line in FIG.

Next, the 8th [i! The chuck 3b shown in I is attached to the workpiece 31.
In this state, the tool rest 6 corresponding to the spindle 3a is appropriately moved together with the tool 33 in the direction of arrow E in FIG. 2 and the direction of arrows A and B in FIG. 1 (Z-axis direction). , a first process is performed on the workpiece 31 using the tool 33.

During the machining, the roller 31 to be primarily machined is supplied to the hand 19 of the loading device 9A shown in FIG. 8, and the work 31 is gripped.

In this way, as shown on the left side of FIG. 9, when the first process has been performed on the workpiece 31, the headstock 3 is
b and move it a predetermined distance in the direction of arrow B,
With the chuck 5b opened, the headstock 5 is moved a predetermined distance in the direction of the arrow to bring the headstock 5 closer to the headstock 3.5 degrees.

Then, the right end portion in FIG. 10 of the workpiece 31 that has undergone the first step and is held by the chuck 3b is inserted into the chuck 5b.

Next, the chuck 5b is closed to hold the right end of the workpiece 31 in the figure, and the chuck 3b is further opened.

The holding relationship between the chuck 3b and the workpiece 31 is released. In this state, as shown in FIG. 11, the headstock 3 is moved along with the chuck 3b by a predetermined distance in the direction of the arrow B, and the headstock 5 is moved in the direction of the arrow B with the workpiece 31 held by the chuck 5b. the headstock 3 by moving it a predetermined distance.
．． The workpiece 31 is transferred within 5 minutes.

Next, in this state, the chart 5b is rotated together with the workpiece 31, and the tool rest 6 corresponding to the spindle 5a is rotated.
, along with the tool 33 in the direction of arrow E in Figure 2 and arrow A in Figure 1.
, by appropriately moving and driving the workpiece 31 in the B direction (Z-axis direction), as shown in FIG.
During this process, the workpiece 31 is fed to the chuck 3b of the headstock 3 using the loading device 9A, and the workpiece 31 is processed in the second step. Performs two-step processing.

In this way, the workpiece 31 held by the chuck 5b has been processed in the second step.

By driving the arm rotation cylinder 12 of the loading device 9B and retracting the rod 12a in the direction of the arrow H, the arm]7 is swung in the direction of the arrow together with the hand L9, and the chuck 5b shown in FIG. 5. In this state, the headstock 5 is driven to move in the direction of the arrow, with the chuck 5b holding the machined work 31. Then, the workpiece 31 is positioned at the position inserted between the claws 25□a and 25b of the hand 19. In that state, the claws 25a, 25
Close b and grip the workpiece 31.7 Next, the workpiece 31
The holding relationship between the chuck 5b and the chuck 5b is released, and in this state, the headstock 5 is moved together with the chuck 5b in the direction of arrow B, and the hand 19 is rotated together with the processed workpiece 31 in the direction indicated by the arrow in FIG. Waiting position X- shown in solid line in Figure 2
Position to 3. In that state, the processed workpiece 31
and the hand 19 of the loading device 9B, and remove the string workpiece 3 from the hand 19. In the embodiment described above, the workpiece 3 is transferred between the headstock 3.5. At this time, move the headstock 3 in the direction of arrow B and the headstock 5 in the direction of arrow A.

Although the case has been described in which the headstocks 3.5 are brought closer together by moving the headstocks 3.5 to 8a, the method for bringing the headstocks 3 and 5 closer together is not limited to this. Any method may be used as long as it can be brought closer. For example, move the headstock 3 in the 2@ direction (arrow A-8 direction).
By moving only the headstock 5 in the direction of the arrow toward the main spindle stock 3 without moving the workpiece 3, the workpiece 3 may be transferred by bringing these headstocks 3 degrees closer together. In addition, on the contrary, by moving only the headstock 3 in the direction of arrow B toward the headstock 5 without moving the headstock 5 in the two-axis directions, the headstocks 3 and 5 can be brought closer together. Good too.

Note that when processing a particularly long workpiece 3], the loading devices fi9A and fi9B are positioned at standby positions Xi and X3, respectively, as shown in FIG. 14, and the hands 19 and 19 are aligned. . In addition, the headstock 3 is moved in the direction of the arrow in, and the headstock 5 is moved in the direction of the arrow B so that the workpiece 31 can be fed between the chucks 3b and 5b.
The distance between the chucks 3b and 5b is determined by arrow A on the workpiece 31,
It is made wider by a predetermined distance than the length in direction B. next.

In this state, loading devices t9A and 9B shown in FIG.
Each arm 17. ．． 17, synchronously hand 19.19
and rotate in the direction of the arrow.

Then, hand 19.19, as shown in FIG.
The workpiece 31, which is positioned opposite the chucks 3b and 5b of the headstocks 3 and 5, respectively, and which is gripped by the hands 19 and 19, is positioned between the chucks 3b and 5b. In this state, move the headstock 3 along with the chuck 3b to arrow B.
The headstock 5 is moved together with the chuck 5b in the direction indicated by the arrow, and the workpiece 31 is held between the chucks 3b and 5b. The claws 25a and 25b of each hand 19 of 9A and 9B are released to release the gripping relationship between the hands 19 and 19 and the workpiece 31. Furthermore, in this state, each arm 17, 17 of the loading device W19A, 9B shown in FIG. 3 is rotated in the direction of the arrow, together with the hands 19, L9, respectively, to the standby position 1ifX1. shown in FIG. Let's go back to X3.

In this way, when the long workpiece 31 is held by the chucks 3b and 5b, the chucks 3b and 5b are rotated synchronously with the workpiece 31. In this state, the tool rest 6.6 shown in FIG. , in the directions of arrows E and F, and in the directions of arrows A and B in FIG.
1 into a predetermined shape.

In this way, when the long workpiece 31 is machined into a predetermined shape as shown in FIG. 17, the machined workpiece 31
The 18th Li! As shown in I, loading device 9
Grip it with each hand 19.19 of A and 9B, and further,
In this state, move the headstock 3 in the direction of arrow B, and move the headstock 5 in the direction of arrow B.
Move it in the direction.

The headstock 3.5 is retracted from the workpiece 31. next.

Each hand 19.19 of loading device 9A, 9B,
The workpiece 31 is synchronously rotated in the direction of the arrow in FIG. 3, and positioned at the standby positions X, 1, and x3 shown in FIG. 14. In this state, the grasping relationship between each hand 19, 19 and the processed workpiece 31 is released, the workpiece 3L is removed, and the workpiece 3L is carried out to a predetermined location.

In addition, in the embodiment described above, the hand 19 is
As shown in the figure, the work holding part 25 is shaped like a ■ character.
A case will be described in which the claws 25a and 25b having claws 25a and 25c are provided so that they can be driven to open and close freely, and the workpiece 31 is held between the workpiece holding parts 25c of the claws 25a and 25I). However, the hand 19 is not limited to this, and of course may be configured in any manner as long as it can securely grip the workpiece 31.For example, the hand 19 may be configured as shown in FIG. At the tip of the nail.

The roller may be provided rotatably. Hereinafter, the hand 19 having the roller will be explained based on FIG. 20.

As shown in FIG. 20, the hand 19 has a main body 37 provided at the tip of the arm 17 shown in FIG. 3, and a drive cylinder 39 is provided within the main body 37. A rod 39a is supported by the drive cylinder 39 so as to be able to protrude and retract in the directions of arrows P and Q, which are left and right directions in FIG. 1, and an engagement member 40 is attached to the tip of the rod 39a.

A groove 40a is formed in the engagement member 40.

A roller 41m is slidably fitted into the groove 40a and engaged with a roller 41 rotatably supported by claws 41a and 41b, which will be described later. The claws 41a, 41b are attached to the main body 37 via the bottle 41c.
, 41d so as to be rotatable in the directions of arrows R and S, and nine rollers 41e and 41f are rotatably provided at the tips of the claws 41a and 41b, respectively, via bins 41h and 41i. ing. In addition, the main body 37 shown in FIG.
A roller 41g is provided rotatably via a bin 41j, and the left end portion in the figure protrudes from the main body 17 in the direction of arrow P.

Loading devices 9A, 9 having the above-mentioned hand 19
Using the bar feeders 43 and 43 installed on both the left and right sides of the multi-tasking machine tool 1 in FIG. That is, in order to perform bar feeder processing, first prepare the headstock 3.5 shown in Fig. 1.

The chuck 3b is moved and driven in the directions of arrows A and B, respectively.
, from the hand 19 of the loading device 119A by arrow A
The chuck 5b is positioned a predetermined distance away from the hand 19 of the loading device 9B in the direction of arrow B. −
In this state, the bar feeder 43.43 shown in FIG. 1 is driven to feed the workpiece 31.31 to each spindle 3a, 5a.
Via.

They are sent out toward chucks 3b and 5b, respectively, with their tips pointing in the direction of arrow B from chuck 3b.

Further, they are set so that they each protrude a predetermined length from the chuck 5b in the direction of the arrow.

Next, by rotationally driving the spindles 3a and 5a, the workpiece 31,
31 and rotate each tool rest 6 shown in FIG. 2 along with the tool 33 in the direction of arrow A.

Drive in direction B and arrows E and F in FIG.
The outer diameter portion of the workpiece 31.31 shown in the figure is machined.

In this way, when the machining of the workpieces 31 and 31 is completed, the workpieces 3L and 3L are cut off and the workpiece 31.
．． To separate each machined part of 31 from the other unprocessed parts, first move the headstock 3 along with the workpiece 31 in the directions of arrows A and B as shown in FIG. By moving in the directions of arrows A and B, each processed part of the workpiece 31 and 31 is loaded into the loading device! i! Hands 9A and 9B 19.1
9 (see FIG. 20). Further, each of the tool rests 6 shown in FIG. 2 is moved along with the cut-off tool 33 in a direction perpendicular to the plane of the paper in the figure, that is, in the direction of arrows A and B in FIG.
31 at a position opposite to the part that should be the bright spot.

Next, the drive cylinder 39 of each hand 19 shown in FIG.
to drive the rods 39a, 39a.

They are made to protrude in the direction of arrow P together with the engaging members 40 and 40, respectively. Then, the claws 41a and 41b of each hand 19 are pressed against the rod 39a through the roller 41 and the groove 40a of the engaging member 40, and the pins 41c and 41d are pressed against the rod 39a.
It turns around in the direction of arrow S and opens.

In this state, each arm 17 of the loading devices 19A, 9B is rotated together with the hand 19.19 in the direction of the arrow, and the workpiece 31.31 shown in FIG. Fit each processed part into engagement. In this state, drive the drive cylinder 39 of each hand 19 shown in FIG. 20 to move each rod 39a, 39a.
It is retracted together with the engaging members 40, 40 in the direction of arrow Q. Then, the claws 41a and 41b are pulled by the rod 39a through the rollers 41, 41m, and the groove 40a of the engaging member 40, and rotate in the direction of arrow R about the bins 41c and 41d. Then, each roller 4 of the claws 41a and 41b
1e and 41f come into contact with the tip of the workpiece 31.31,
Further, each workpiece 31 is pressed in the direction of the roller 41g, and the workpiece 31 is moved onto the rollers 41e, 41. Place it between f and 41g.

In this way, each machined part of the workpiece 31 is transferred to each hand 19.
1, the spindles 3a and 5a shown in FIG. 1 are driven to rotate together with the workpiece 31.31, and the tool rest 6.6 is sent in the direction of the arrow E in FIG. 2 together with the cut-off tool 33.33. So, work 31.31
Cut off each processed part of the workpiece 31.31 from the other unprocessed part. At this time, the workpiece 31.31 is cut off by the rollers 41e and 4.1f of each hand 19 shown in FIG. , 41g, the rotation of the spindles 3a, 5a is not hindered by the hand 19, and each workpiece 31 can be cut off without any trouble. Also, at this time, each work 3
Since the processed part 1 is supported by the hand 19 in such a manner that its movement in the directions of arrows A and B is restricted, the processed part does not fall from the hand 19.

In this way, when the processed parts of each workpiece 31 are separated, loading devices 9A and 9B shown in FIG.
Each arm 17.17 of the workpiece 3 is attached to the hand 19.19.
1. With the machined part 31 supported, each hand 19 is rotated in the direction of the arrow and positioned at the standby position [Xl, X3] shown in FIG.
l [Open the claws 41a and 41b of each hand 19 of 9A and 9B, release the supporting relationship between the hands 19 and 19 and the processed part of the workpiece 31.31, and remove the processed part from each hand 19. and transport it to the designated location.

When the processed parts of each workpiece 31 have been carried out, the bar feeder 43.43 shown in FIG. and continue the specified bar feeder processing.

In addition, in the embodiment described above, the workpiece 31 that has undergone the first process is held by the chuck 3b.

The case has been described in which the workpiece 31 is transferred to the headstock 5 by moving the workpieces 3 and 5 toward each other in the Z-axis direction, but the method for transferring the workpiece 31 is not limited to this. Any method may be used as long as the workpiece 31 can be transferred from the table 3 side to the headstock 5 side.1 For example, if the workpiece 31 is a bar workpiece, and the workpiece 3
1 is fed to the chuck 3b by the bar feeder 43 shown on the left in FIG. By driving the bar feeder 43 in this state, the work 31 is moved in the direction of arrow B, and the tip of the work 31 is inserted into the opened chuck 5b. By closing the chucks 3b and 5b in this state, the workpiece 31 is held by the chucks 3b and 5b. In this state, a predetermined portion of the workpiece 31 between the chucks 3b and 5b is cut off by the cutoff tool 33 as described above. Then, the second J7. After performing the above processing, the part of the workpiece 31 that has undergone the second process is further carried out from the chuck 5b to a predetermined carrying out location using the hand 19 of the loading device @9B.

Further, the work 31 may be transferred as follows. That is, after completing the first step, the chuck 31] and the workpiece 3
1, and in that state, load the loading device 5i.
The workpiece 31 is gripped by the hand 19 of 9B. Furthermore, by moving the headstock 3 in the direction of the arrow in FIG. 1 in this state, the unprocessed portion of the workpiece 31 is pulled out from the chaff 3b.

Next, the gripping relationship between the workpiece 31 and the hand 19 is released.

Furthermore, move the headstock 5 in the direction of the arrow, and move the chuck 5.
grip the tip of the workpiece 31 with b.

It is also possible to cut through the work 31 and transfer the work 31.

(g) 0 Effects of the Invention As described above, according to the present invention, the first and second headstocks (for example, the headstock 3.5 ), a first workpiece holding means (for example, chuck 3b) is mounted on the first headstock (for example, headstock 3), and a second workpiece holding means (for example, chuck 3b) is mounted on the second headstock (for example, headstock 5). A workpiece holding means (for example, the chuck 5b) is mounted, a first workpiece handling means such as a loading device 9A is provided in a pair with the first headstock, and a second workpiece handling means such as a loading device 9B is mounted. A handling means is provided in a pair with the second headstock, and a work holding part such as a hand 19 is attached to the first work handling means at the first standby position tX1 and the first work holding means. The second work handling means is provided with a work holding part such as a hand 19, which is movably driven only between the first work handing position x2 facing the The workpiece 31 is gripped by the workpiece holding section of the first workpiece handling means, and the workpiece is transferred in that state. Move the holding part to the first standby position
1, the workpiece 31 is positioned at the first workpiece transfer position 1iff By transferring the workpiece 31 to the holding means, the workpiece 31 can be attached to the first headstock. Further, the work holding part of the second work handling means is positioned at the second work transfer position x4, and in this state, the second headstock is moved.

Along with work 31, the second work delivery position l! The workpiece 31 can be removed from the second headstock by moving the workpiece 31 in the Z-axis direction toward the workpiece holding section positioned at x4 and transferring the workpiece 31 to the workpiece holding section.

Further, the first headstock and the second headstock are moved relatively to each other in two axial directions, so that the workpiece 31 held by the first workpiece holding means is transferred to the second workpiece holding means. By transferring the workpiece 31 to the first headstock, the workpiece 31 can be transferred from the first headstock to the second headstock without using a handling robot or the like. When processing a long workpiece 31, the first and second
gripped by each workpiece holding part of the workpiece handling means, and moving the workpiece holding parts synchronously in this state,
The workpiece 31 is positioned between the first and second headstocks, and in this state, the first and second headstocks are respectively moved in the Z-axis direction to approach the workpiece 31. The work 31 can be held by the second work holding means.

Furthermore, when cutting off the workpieces 31 and 31 held by the first and second workpiece holding means, each workpiece holding part of the first and second workpiece handling means is moved to the first workpiece transfer position x2. , is positioned at the second workpiece transfer position x4, and in that state, each workpiece holding section rotatably holds the workpieces 31 and 31, and in this state, each workpiece 31 can be cut through 1.

As a result, by using the first and second workpiece handling means, which do not have the function of moving in the Z-axis direction, either alone or in combination, various workpieces can be mounted and removed from two opposing headstocks. It is possible to perform various operations such as holding a workpiece associated with cut-off processing. Furthermore, it is possible to transfer workpieces between the headstocks,
The workpiece handling means does not need to have a function of moving in the Z-axis direction, and the control procedure and configuration of the distribution handling means can be simplified.

Further, the bar feeder 43 is used to transfer the workpiece between the headstocks, and the processed workpiece 31 is carried out using only the second handling means to continue machining. is also possible. As a result, it is possible to provide a multi-tasking machine tool 1 that can process a wide range of workpieces. Furthermore, even if the machining length of the workpiece 31 is different, this can be easily handled by controlling the amount of movement of the headstock in the Z-axis direction using a cutting nib program. As a result, the movement of the workpiece handling means can be suppressed to a minimum, and control can be simplified compared to conventional handling means. Furthermore, since the handling means does not move in the Z-axis direction, the operator can safely process the workpiece 31 without colliding with the handling means.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a multi-tasking machine tool according to the present invention. 2 is a left side view of FIG. 1, and FIG. 3 is a five-sided view showing the loading device installed in the multitasking machine tool shown in FIG. 1. FIG. 4 is a diagram showing the main parts of the loading device. 5 to 13 are process diagrams showing how a workpiece is processed using an embodiment of the present invention. FIGS. 14 to 19 are process diagrams showing how a long workpiece is processed using an embodiment of the present invention, and FIG. 20 is a diagram showing another example of the hand of the loading device. 1... Multi-tasking machine tool 3... First headstock (headstock) 3b...
- First work holding means (chuck) 5...Second headstock (headstock) 5b...Second work holding means (chuck) 9A, 9B...・Work handling means (loading device) 19... Work holding part (hand) xl...
...First standby position (standby position) x2...First
Work transfer position (work transfer position) X3...Second standby position (standby position) x4...
・・・Second work delivery position (work delivery position) Applicant Yamazaki Mazak Co., Ltd. Agent Patent attorney Phase 1) Shinji (and 2 other people) Toku faction Beedrop faction

Claims (1)

[Scope of Claims] First and second headstocks are provided facing each other and movably driven in the Z-axis direction, and a first workpiece holding means is attached to the first headstock. At the same time, a second workpiece holding means is mounted on the second headstock, a first workpiece handling means is provided to be paired with the first headstock, and the second workpiece handling means includes: A workpiece holding section is provided in a pair with the second headstock, and the first workpiece handling means is provided with a workpiece holding section at a first standby position and a first workpiece transfer position opposite to the first workpiece holding means. The second workpiece handling means is provided with a workpiece holding section so as to be movable only between a second standby position and a second workpiece transfer position opposite to the second workpiece holding means. A multi-tasking machine tool configured to be freely movable and driven.