JPH0360824A - Working method of plate material working device and work clamp instrument used in it - Google Patents

Abstract

PURPOSE:To improve the workability for device by detecting the work clamp member which enters in the die interference area of the metallic die of the plate material working device, releasing holding of the work and saving or automatically returning it. CONSTITUTION:On the plate material working device 1 which mounts the work clamping device 15 at the slide member 13 so as to be freely positioned in left and right directions, and mounts the clamping member 17 to be freely slidable in Z direction, the constitution is so made that the detecting body 25 detects the clamping member 13 which enters the Z axis or the die interferencing area, the approaching work holding part 23 is released from holding, saved and returned automatically when it goes out of the interferencing area. Therefore, the damage of the work clamping device 15 is prevented and the workability is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the invention 1 (Industrial application field) This invention is directed to a plate processing device such as a punch press,
The present invention relates to a processing method in a punch/laser compound processing machine, etc., and a work clamp device used in the processing method.

(Prior art) Conventionally, in plate processing equipment such as punch presses and punch/laser composite processing machines, a workpiece is gripped by a workpiece clamp device, positioned by a slide member, etc. according to commands from an NC, etc., and then processed. Punching or laser processing is performed at the points.

At this time, if the workpiece gripping part of the workpiece clamping device approaches the punch or laser processing point due to the shape and position of the workpiece, the workpiece gripping part and the mold held by the turret or the Z-axis head for the laser may interferes. In order to prevent damage due to this interference, an override area was provided near the punching point so that punching could only be performed when it was confirmed that the workpiece grip would not interfere with the die, etc. . In addition, in order to prevent interference between the Z-axis head and the workpiece grip near the laser processing point, it is common to create a dead zone around the workpiece grip to prevent the workpiece grip from approaching and laser processing. be.

Other methods of preventing interference with workpiece clamping devices other than those mentioned above include rotating or retracting the clamp to prevent interference, or moving the clamp in the X-axis direction of the carriage as in the clamp position. hand,
Measures have been taken to avoid interference by programming the clamp position in advance.

(Problem to be Solved by the Invention) By the way, among the methods for avoiding workpiece clamping in conventional plate processing equipment, the method of providing an override area is to ensure that the mold and workpiece grip do not interfere with each other. This must be confirmed and the judgment is made visually, which often results in damage to the mold or workpiece clamping device due to incorrect judgment.

Furthermore, the method of creating a dead zone region not only reduces the yield of material, but also requires the machine to be temporarily stopped and the position of the clamp to be moved during processing.

The method of rotating the clamp requires separate drive mechanisms, piping, controls, etc. for clamp operation and clamp rotation, and the number of clamps must be reduced so that the clamps do not interfere with each other when rotated. , clamp knob] or the inability to provide optimal piping according to the shape of the workpiece.

The method of moving the clamp forward and backward requires a separate drive mechanism and piping, similar to the method of rotating the clamp that has been placed above.
Control is required. In particular, when the entire clamp passes over a die, a positive base, a cartridge for laser processing, etc., or when performing molding processing (burring, louvering, etc.), the material may deteriorate due to stripping errors, etc. Sometimes, it is necessary to raise the entire clamp smoothly by the step or lift. However, this is not possible, resulting in damage to the clamp or deformation of the workpiece.

Further, since the clamp mounting position cannot be moved, it is not possible to arrange the clamp at an optimal position depending on the shape, size, processing shape, etc. of the workpiece.

The method using a clamp position is mechanically large-scale, and since processing is interrupted while the clamp is moving, there are many clamp changes, resulting in a considerable amount of total lost time. In addition, the operator must calculate the relationship between the clamp position and the machining position in advance each time, and create a program to move the clamp, making the program extremely complex as the number of clamp changes increases. .

Therefore, since errors and the like increase, conventional override areas or dead zone areas are still required to prevent damage to molds, clamps, etc. due to programming errors. In addition, because the clamp escapes in the X-axis direction, when continuously machining the end of the workpiece on the clamp side using a punch or laser, there is no way for the clamp to escape at both ends of the X-axis, creating areas that cannot be machined. There was a problem that processing had to be interrupted.

The purpose of this invention is to improve the above-mentioned problems by detecting the interference area between the clamp and the mold or Z@, etc., removing and retracting the clamp, and automatically returning the clamp when it is out of the interference area.
By sliding the clamp itself downward, the mounting position of the clamp can be set freely, making it more compact than 1 g6.
It is an object of the present invention to provide a processing method in a plate processing device that prevents damage to the clamp and improves workability, and a work clamp device used in the processing method.

"Structure of the Invention" (Means for Solving the Problems) In order to achieve the above object, the present invention provides a workpiece clamp device on a slide member so as to be freely positionable in the left and right direction via a locking member, and In a plate processing device in which a clamping member of a clamping device is slidably provided in the Z-axis direction via a bullet, when the clamping member approaches the Z-axis or the mold and enters an interference area, a detection object detects the clamping member. This is a processing method in a plate material processing apparatus, in which the workpiece gripping portion of the approaching clamp member is released from its grip and retreated, and when the clamp member moves out of the interference area, the clamp member automatically returns to grip the workpiece again and performs plate processing on the workpiece.

Further, the clamping position used in the clamping method according to the present invention as described above is such that a workpiece clamping device equipped with a locking member is engaged with a slide member in a plate processing device, and the clamping member of this workpiece clamping device is moved through an elastic machine. A clamper is provided on the nail plate so as to be slidable in the Z-axis direction and also to grip the workpiece, and the opposite side of the clamper to the gripping side is in sliding contact with the inclined surface of a wedge body that is locked to a cylinder operated by fluid pressure. The work clamp 'vi is provided with a detecting body that can freely come into contact with and separate from a dog provided in the left and right direction of the slide member.
The device was installed to constitute a work clamp device in a plate processing device.

(Function) By adopting the processing method in the plate processing device and the work clamp device used in the processing method of the present invention, the work clamp device can be attached to the sliding member of the plate processing device by the locking member at any position in the left and right direction. It can be fixed, and the clamping position can be moved to an appropriate R position depending on the shape and size of the workpiece.In addition, the clamping member of the workpiece clamping device can be moved in the Z-axis direction via a bullet. Because it can slide freely, it can pass through parts such as dies, cartridges, and repository bases without any problems.
It is also possible to follow the lifting of the workpiece.

Further, when the clamp member of the work clamp device approaches the Z-axis or the mold of the plate processing device, a detection body provided in the work clamp device detects contact with a dog provided in the left-right direction of the slide member. Based on the detection signal from the detection object, the clamper is pressed through the inclined surface of the wedge body to switch the hydraulically operated cylinder that grips the workpiece to release the workpiece grip and move the clamp member out of the interference area. When the cylinder moves out of the interference area, the cylinder is automatically activated again, and the clamp member moves forward and the clamper grips the workpiece.

This prevents interference between the clamp member and the mold or the Z-axis, etc., and allows a series of operations such as releasing, retracting, returning, and re-clamping the clamp to be performed smoothly without interrupting processing, making it compact and compact. The mechanism and control improve workability.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

To facilitate understanding, the overall configuration of a punchless machine as a plate processing device will be briefly described.

Referring to FIG. 7, the punch press machine 1 has an upper frame 3 and a lower frame 5 integrated into a gate-shaped frame 7.
It consists of Although not shown in this gate-shaped frame 7, there is an electric t! The ram is provided so as to be vertically movable via a lighting member such as JIa. An upper turret 9 is rotatably provided vertically on the upper frame 3, and a lower turret 11 is rotatably provided on the lower frame 5, facing the upper turret 9.

With the above configuration, the ram moves up and down to press a punch (not shown) provided on the circumference of the upper turret 9, and the punch positively moves with a goad provided on the circumference of the lower turret 11, thereby performing punching.

On the other hand, a work clamp device 15 is supported by a slide member 13 provided in the gate-shaped frame 7, and one end of the work W is gripped by a clamp member 17 between the work clamp bags 15.

With the above configuration, the work W is held by the clamp member 17, and the slide member 13 is held in accordance with the command value from the NC device or the like.
to move in the X-axis and Y@ directions and move the upper and lower turrets 1
It is positioned at a predetermined position between 11 and 11. The upper and lower turrets 9 and 11 are similarly rotated according to command values, and a predetermined mold (punch and die) is positioned at a processing point and punching is performed.

The work clamp device 15 engaged with the slide member 13 will be described in more detail.

1 to 6, FIG. 1 shows an example in which a punching machine 1 is equipped with a work clamp device 15, and FIG. 2 shows an example in which a work clamp device 15 is installed in a laser processing machine 19.
An example equipped with 5 is shown. Incidentally, the work clamping device 15 can be used with both types.

As shown in FIGS. 1 and 3, the workpiece clamping device 15 is roughly divided into a locking member 21 that locks onto the slide member 13 in a position-setting manner, a clamping member 17,
It is composed of a workpiece gripping section 23 and a detection body 25 that detects when the workpiece end portion 23 enters the interference area.

The locking member 21 is attached to the carriage 27 (
Clamp plate 29 provided integrally with (partially not shown)
The clamp body 31 is engaged with. This crank body 31 is the clamp member 1 of the work clamp device 15.
7, and in order to lock the clamp body 31 to the clamp plate 29, a lock plate 35 that contacts the sliding surfaces 33 of the two clamp plates is movable by a guide screw 37 (83 in FIG. The crank body 31 is attached to the crank body 31 in a direction perpendicular to the crank body.

Further, a clamp lever 39 that presses the lock plate 35 is screwed into the clamp body 31.

With the above configuration, the clamp lever 39 is loosened, a gap is created between the sliding surfaces 33 of the two clamp plates and the lock plate 35, and the crank body 31 is moved in the When the clamp lever 39 is tightened at a predetermined position, the clamp body 31 is moved to the carriage 2 via the lock plate 35.
7 for positioning.

The clamp member 17 is configured by integrally incorporating a cylinder body 43 that constitutes a cylinder 41 and a work gripping section 23, which will be described later.

The cylinder body 43 is engaged with a plurality of guide shafts 45 that are engaged with the clamp body 31 via bushings 47, and is provided so as to be able to move vertically. (See FIG. 6) Furthermore, as shown in FIGS. 3 and 5, in order to balance the weight of the cylinder body 43 on the clamp body 31, a plurality of large bolts 49 pass through the clamp body 31 and attach the cylinder body 43 to the clamp body 31. A bullet 51 is built in between the bolt 49 with a hole and the clamp body 31. Further, a plurality of preload springs 53 are installed between the crank body 31 and the cylinder body 43, and a set screw 55 that presses the preload springs 53 is attached to the clamp body 31.
It is set in. Incidentally, reference numeral 56 shown in FIG. 5 is a stopper bin that determines the lower limit of the cylinder body 43.

With the above configuration, the clamp member 17 is attached to the crank body 3.
1, the dead weight of the clamp member 17 is balanced by the bullet 51 and a predetermined preload is applied by the preload spring 53, so that the clamp member 17 can freely move in the Z@ direction (vertical direction in FIG. 1). It has become.

Next, regarding the configuration of the cylinder 41 and the work gripping section 23,
This will be explained with reference to FIGS. 1, 3, and 5.

A piston 57 is mounted in the cylinder body 43, and a spherical bearing 61 is attached to the tip of the piston rod 59 of the piston 57.
A wedge body 63 is provided through.

Pressure fluid flows into the cylinder 41 from the inlet 65 into the rear pressure chamber 67 . Note that a compression return spring 69 is attached to the front side of the piston 57.

The work gripping portion 23 includes a clamper guide 73 that is integrally attached to the tip of the cylinder body 43 with a bolt 71.
is provided. A nail plate 77 is provided which is guided by a nail plate guide 75 provided on the lower surface of the clamper guide 73 and is movable back and forth.The nail plate 77 has stopper portions 79 protruding from both sides to limit the forward movement (as shown in FIG. 3). left side) and stops at an abutment 81 provided on the nail plate guide 75. Further, a bottle 85 fixed to the wedge body 63 is inserted into a long hole 83 provided in the nail plate 77 and serves as a guide for the wedge body 63.

Left and right sides of the nail plate 77 (upper and lower sides in Figure 3)
A side block 87 is integrally provided on the side block 87, eight hinge bins are spanned over the side block 87, and a clamper 91 is rotatably mounted on the hinge bin 89. A side gauge 93 is provided on the tip side (left side in FIG. 1) of the side block 87, and the contact surface of the workpiece W comes into contact with the side gauge 93 to determine the reference position in the Y-axis direction.

The clamper 91 has an arc-shaped clamper 95 formed at its tip, and an inclined surface 9 formed on the wedge body 63 at its rear end.
A contact 99 having a spherical surface that makes sliding contact with 7 is engaged. Furthermore, a compression bushing spring 101 is installed between the clamper 91 and the wedge body 63.

With the above configuration, the workpiece W is clamped by the workpiece clamp device 15.
When clamping the slide member 13 and carriage 2
7 returns to the home position, and first, at the solid line position shown in Fig. 1, with the workpiece W in contact with the side gauge 93, step on a foot switch, etc. for changing the valve VJ (not shown) to change the valve. . When the valve is switched, compressed air or pressure oil is supplied from the inlet 65 into the rear pressure chamber 67 of the cylinder 41, and the piston 57 moves forward (towards the left in FIG. 1) against the compression return spring 69.

As the piston 57 moves forward, the wedge body 63 locked to the piston rod 59 moves forward, and the inclined surface 97 provided on the wedge body 63 causes the clamper 91 to rotate counterclockwise about the hinge bin 89. As the clamper 91 rotates, the front end clamping surface 95 of the clamper 91 presses the surface of the workpiece W, and the workpiece W is gripped in cooperation with the nail plate 77.

The cylinder pressure is expanded by the wedge effect of the inclined surface 97 of the wedge body 63, and the clamper 9 has a shape of ■.
1 has different strengths on the left and right sides with the hinge bin 89 at the center, so the distance ratio acts as a lever and is further expanded, making it possible to generate a large gripping force. In order to prevent the workpiece W from shifting, etc., the nail plate 77 that grips the workpiece W and the clamping surface 95 of the clamper 91 are processed with lines, etc., although not shown. In addition, when the compressed air or pressure oil that was being supplied to the cylinder 41 is discharged by switching the valve, the piston 57 returns to its previous position due to the elastic force of the compression return spring 69 built into the cylinder 41, and the workpiece Release your grip on W.

Next, the configuration of the detection body 25 that detects that the workpiece gripping part 23 enters the interference area where it interferes with the mold or the Z axis is as follows.
Referring to FIGS. 1, 3, and 4, the clamp body 3
Multiple detectors 105 (e.g. limit switches,
A roller 107 that operates a contact type detector, etc.)
are integrally provided. Note that the reference numeral 1 shown in FIG.
09 is a Z@ head, which guides and focuses laser light and moves up and down; With the above configuration, during punching processing or laser processing, as shown in FIG. 1, the processing point of the upper turret 9 of the punch press machine 1 is A. Or as shown in Figure 2,
When the workpiece gripping section 23 approaches the processing point A of the laser processing machine 19, the workpiece gripping section 23 interferes and is damaged. Therefore, when entering an interference area, it is necessary to avoid interference.

In order to avoid interference, the Y-axis direction is not shown, but it is detected by a dog and a limit switch, etc., and the X-axis direction is detected by the dog 103.
The work gripping part 2 is detected in the interference area by the detection between the detection body 25 and the
Detects that 3 is entered.

Only the work clamping device 15 that has entered the area detected by both of them, that is, the conventional override area or the dead zone area, moves the cylinder 41 by its detection signal.
The fluid pressure supply system is switched to discharge compressed air or pressure oil from the cylinder 41.

When the compressed air or pressure 11 in the cylinder 41 is discharged, the 6 compression return springs and the compression bushing spring 10
The piston 57 is retracted by the elastic force of 1, and the wedge body 63 that is interlocked with the five piston rods also moves. Therefore, the clamp surface 95 of the clamper 91 opens and releases the grip on the workpiece 1N. When the piston 57 further retreats, the bottle 85 fixed to the wedge body 63 is inserted into the elongated hole 8 provided in the nail plate 77.
3, the nail plate 77 is moved together, and the workpiece end 23 is retracted by making a stroke from point A to point B shown in FIGS. 183 and 172.

Note that since three to four workpiece clamping devices ffff15 are normally used, the other workpiece clamping devices 15 that do not enter the interference area continue to hold the gripping state.

Therefore, the workpiece W is maintained at a predetermined position and machining is continued, so there is no need to interrupt the machining.

When the detector 25 detects that the work clamping device 15 has finished machining the interference area and has left the t'J'A battlefield, compressed air or pressure oil is supplied into the cylinder 41 again, and the piston 57 As the wedge body 63 moves forward, the wedge body 63 moves forward. Note that the elastic force of the compression bushing spring 101 is set to be slightly stronger than the sliding resistance of the wedge body 63, and before the clamper 91 operates, the compression bushing spring 101 pushes the clamper 91, the side block 87, and the hinge bin 89. , the nail plate 77, the side gauge 93, and other workpiece gripping members move forward.

A stopper portion 79 provided on the nail plate 77 abuts against the abutment surface 81 of the clamp blade J-id 73 and accurately returns to the previous position. After the nail plate 77 stops at the forward limit, it is further pressed and presses the compression bushing spring 101, so that the workpiece W is strongly clamped by the above-described operation.

As shown above, when the upper turret 9 of Pande Press IIvi1 or the Z@109 work clamp device 15 of the laser processing machine 19 approaches and enters the interference area, the detection object 2
5, the work gripping section 23 is automatically released and retracted, and when it is detected that it is out of the interference area, it returns to its original position and then clamps the work.

Along with this series of operations, the clamping member 17 of the work clamping device 15 is made vertically slidable, and the position at which the lower workpiece clamping device 5 is attached to the carriage 27 is also movable.

Therefore, the workpiece gripping part 23 does not interfere with the mold, the Z axis, the head, etc., and can prevent damage, and can avoid clamping and accurately return to the previous position without interrupting processing. A series of operations such as clamping can be performed smoothly and simply, with a compact mechanism and controls.
This can be achieved by improving work efficiency.

In addition, since the clamping member 17 can follow in the vertical direction, it can pass through parts such as dies, cartridges, and rotational bases without any problems, and the workpiece clamping device 15 can be used to lift the workpiece during molding or stripping errors.
It is possible to prevent the problem of deformation of the workpiece, etc.

Furthermore, the installation position of the workpiece clamping device 15 can be moved to an appropriate position according to the shape and size of the workpiece, so the position can be programmed in advance to allow the clamp to escape depending on the machining process. There is no longer any need for complicated work such as keeping it in place.

Note that the present invention is not limited to the embodiments described above, and can be implemented in other embodiments by making appropriate changes.

[Effect of the Invention j] As can be understood from the above description of the embodiments, according to the present invention, the interference area between the workpiece clamping device and the mold or the Z-axis, etc. can be detected and avoided, and the area outside the area can be avoided. At the same time as returning to the old position n, the clamp itself moves upward and downward.
It is equipped with a mechanism that can move the clamp and move the clamp mounting position.

Therefore, damage to the work clamp device can be prevented,
Since there is no need to interrupt machining, workability is improved and can be realized with a compact mechanism and control. In addition, since the clamp itself slides in the vertical direction, it can pass through parts such as the die, J-'r-ridge, riboge base, etc. without any problems, and can also follow the lifting of the workpiece when forming or stripping errors occur. , there will be no damage, and problems such as deformation of the workpiece will be eliminated. Furthermore, it is possible to move the clamp position to an optimal position depending on the shape of the workpiece, its niceness, etc., and it is possible to improve productivity.

[Brief explanation of drawings]

FIG. 1 shows the main parts of the present invention, an enlarged cross-sectional view of the part shown by the arrow ■ in FIG. 7, FIG. Plan view,
Figure 4 is an enlarged sectional view along the rV-■ line in Figure 1;
FIG. 5 is an enlarged sectional view taken along the line V-V in FIG.
6 is an enlarged sectional view taken along the line Vl--Vl in FIG. 1, and FIG. 7 is a perspective explanatory view of a punch press machine according to an embodiment of the present invention. 1... Punch press machine 9... Upper turret 13
... Slide member 15 ... Work clamp device 17 ... Clamp member 21 ... Locking member 23 ...
- Work gripping part 25... Detection body 41... Cylinder 51... Bullet machine 63... Wedge body 77... Nail plate 91...
Clamper 87... Inclined box 103... Dog 105
...Detector 109...Z-axis head

Claims (2)

[Claims] (1) A plate material in which a work clamping device is provided on a sliding member so that the position can be freely set in the left and right direction via a locking member, and the clamping member of the work clamping device is provided so as to be slidable in the Z-axis direction via a bullet. In the processing device, when the clamp member approaches the Z-axis or the mold and enters the interference area, it is detected by the detection body, and the workpiece gripping part of the approaching clamp member is released and retreated, and when it leaves the interference area, the A processing method for a plate material processing apparatus, characterized in that the clamp member automatically returns to grip the workpiece again to process the workpiece into a plate material. (2) A work clamping device equipped with a locking member is engaged with a slide member in a plate processing device, and the clamping member of this work clamping device is provided to be slidable in the Z-axis direction via an elastic machine, and the workpiece is gripped. A clamper is rotatably provided on the nail plate, the opposite side of the clamper is provided in sliding contact with the inclined surface of a wedge body that is locked to a hydraulically operated cylinder, and the clamper is provided in sliding contact with the inclined surface of a wedge body that is engaged with a hydraulically operated cylinder, and a A work clamping device for a plate processing device, characterized in that the work clamping device is provided with a detecting body that can be freely separated from the workpiece.