JPH05285570A - Work table device of punching machine - Google Patents

Abstract

PURPOSE:To provide the work table device of the punching noise machine which does not scratch or generate during the metal plate carrying time and can also execute the downward forming. CONSTITUTION:A frame like work carriage slider (work supporting part) 7 provided in the horizontal state is provided freely reciprocating to the work carrying-in direction, together two sides, at least, of the metal plate W to be worked are supported with work clamps 11 set at the inside peripheral part 7a of this work carriage slider 7 and made in the hanging state at the work pass line PL position. Because the work clamp 11 is provided freely approaching and separating against the metal plate W to be worked, the work clamp 11 entering in the interfering territory abutting with the upper die machining head 23 can be retreated in the time machining the surrounding neighborhood of the metal plate W to be worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table device for a punching machine, and more particularly to a work table device for a punching machine that movably supports a work plate in one coordinate axis direction.

[0002]

2. Description of the Related Art Conventionally, in a punching machine, a machined plate material is processed by a work carriage or the like in a work carrying-in direction along a work path line with respect to a plate material processing part such as a press working part composed of an upper mold and a lower mold. It is generally well known that the workpiece is of a movable type, which is configured to perform processing at a predetermined position of a work plate material by moving and positioning.

In this type of punching machine, the work table device is constructed so as to movably support the work plate material at the work pass line height position in the work carry-in direction. In order to prevent interference between the table member and the plate material processing part, the whole or a part thereof is configured as a fixed table such as a center table in a turret punch press, and in the fixed table, a work table extending along a work path line. The machined plate material is configured to be slidably supported on the surface by a free bearing or the like.

[0004]

However, in such a conventional technique, the support of the machined plate material is performed by the point support such as the free bearing, and when the machined plate material slides on the free bearing. In addition, the processed plate may be scratched. In addition, there is a problem that noise is generated during sliding.

Further, when the downward forming process is performed, a convex portion due to the machining projects below the plate material, and the convex portion falls between the free bearings, or the convex portion abuts on the free bearing or the like so that the processed plate material is formed. Since the work plate material was rattled when it was lifted up, the forming process could only be performed upward.

The object of the present invention has been made in view of such a conventional technique, and punching which enables downward forming without causing scratches or noise when the processed plate is moved. To provide a work table device for a processing machine.

[0007]

In order to achieve the above-mentioned object, a work table device of a punching machine according to the present invention has machining heads provided above and below a work path line with respect to a work carrying-in direction. A punching machine that moves and positions in a right angle direction and moves and positions a machined plate material that is held in a horizontal state in the workpiece carry-in direction for machining, and is a frame shape that is reciprocally movable in the workpiece carry-in direction and is horizontally provided. And a plurality of work clamps that are provided on the inner peripheral edge of the work supporting portion and that are provided to grip the periphery of the processed plate material so as to horizontally support the processed plate material in a suspended state at the work path line position. , Is provided.

Further, it is desirable that the work clamp for gripping the periphery of the machined plate material is provided so as to be able to move toward and away from the machined plate material in order to avoid the machining head when it enters the interference area with the machining head.

[0009]

According to the work table device of the punching machine according to the present invention, a frame-shaped work support portion provided in a horizontal state is provided so as to be reciprocally movable in the work carrying-in direction, and an inner peripheral edge of the work support portion is provided. Since the work clamp provided around the work plate holds the work plate in a suspended state at the work path line position, the work plate can be carried in without being brought into contact with a fixed table or the like as in the conventional case.

Therefore, since there is nothing below the machined plate material to support the machined plate material such as a work table from below, there is no interference even if the machined plate material projects downward due to downward molding, and there is no interference. There is no obstacle to the movement of.

Since the work clamp is provided so as to be able to move toward and away from the work plate, the work clamp can be retracted when entering the interference area that abuts the work head when processing the vicinity of the work plate. ..

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the work table device according to the present invention is applied to a punching machine. This punching machine 1 uses a work carriage slider 7 which is guided by a plurality of parallel linear guides 5 provided on the bed member 3 and can reciprocate in the X-axis coordinate direction (workpiece loading direction) as a work supporting portion. Have Further, an X-axis servomotor 9 for moving the work carriage slider 7 is provided in front of the bed member 3 (on the left side in FIG. 1), and the work carriage slider 7 is moved to the X axis via a ball screw and a ball nut (not shown). It is designed to reciprocate in the axial coordinate direction.

The work carriage slider 7 has a rectangular frame shape as a whole, and has an inner peripheral edge portion 7.
In a, a positioning block (not shown) that determines the mounting position of the processed plate W and the processed plate W are set on the work path line P.
A work clamp 11 for holding in the L position is provided. Since this work clamp 11 is a very general one, its explanation is omitted. At least two sides of the processed plate material W are clamped by the work clamps 11 so that the processed plate material W is securely held in a suspended state like a picture of a frame. As described above, since the lower surface of the machined plate W does not contact anything, the use of the large machined plate W that is easily bent is limited to some extent, but it is suitable for the small machined plate W that is not significantly bent. ..

A gate frame 13 is attached to the bed member 3 so as to straddle the bed member 3 in the Y-axis coordinate direction. Further, in the bed member 3, a lower frame (not shown) extending across the bed member 3 in the Y-axis coordinate direction is provided at the same position as the gate frame 13.

A Y-axis servomotor 15 is attached to the front side of the gate type frame 13 in the figure. The Y-axis servomotor 15 is synchronously connected to the upper ball screw 19 and the lower ball screw 21 by a belt-type synchronous drive device 17, and the upper die machining head 23 and the lower die machining head 25 are synchronized with each other in the Y-axis coordinate direction. It is designed to reciprocate. That is, the upper die machining head 23 is guided by an upper linear guide (not shown) provided on the gate frame 13, and the lower die machining head 25 is guided by a lower linear guide provided on a lower frame (not shown). Then, they reciprocate in synchronization with the Y-axis coordinate direction.

The upper mold processing head 23 and the lower mold processing head 25 are single stations in order to reduce the size and avoid interference with other molding locations, and face each other vertically with the work path line PL interposed therebetween. The upper die machining head 23 supports the upper die 27 in a replaceable manner, and the lower die machining head 25 supports the lower die 29 in a replaceable manner.

Although not shown, the upper die machining head 23 and the lower die machining head 25 each have a built-in hydraulic cylinder for machining. The lower die machining head 25 positions the lower die 29 below the work pass line PL (referred to as a raised position) by a certain margin during machining, and moves the lower die 29 above the work pass line PL. It is designed to be positioned downward (called a descent position) by a predetermined amount. Here, the predetermined amount is an amount obtained by adding a certain amount of margin to the forming height during the downward forming process.

Further, an ATC magazine 31 is provided at the back of the bed member 3 in the figure, and the AT of the gate type frame 13 is provided.
An index motor 33 is provided at the end of the C magazine 31 side. Therefore, the upper die 27 and the lower die 29 stored in the ATC magazine 31 can be automatically exchanged with the upper die machining head 23 and the lower die machining head 25 by an automatic die exchanging device (not shown). It is supposed to be installed.

Next, the operation of the punching machine equipped with the work table device having the above-described structure will be described.

First, at least two sides of the work plate W are clamped by the respective work clamps 11 to hold the work plate W inside the work carriage slider 7 in a suspended state. At this time, the processed plate material W is the work pass line P.
It will be held horizontally at the L position.

By driving the X-axis servomotor 9 to move the work carriage slider 7 in the X-axis coordinate direction, the workpiece plate W is moved along the work path line PL in the X direction.
Positioned by moving in the axial coordinate direction. In addition, by driving the Y-axis servomotor 15, the upper die machining head 23 and the lower die machining head 25 are moved and positioned in the Y-axis coordinate axis direction. When performing downward forming on the processed plate material W, the lower die processing head 25 is lower than the work path line PL by the forming height + the amount of margin.
The downward forming does not interfere with the processed plate material W protruding downward. The upper plate processing head 23 and the lower mold processing head 25 can perform downward forming processing on the processed plate material W thus positioned.

In this way, the work carriage slider 7
Since the processed plate material W is held at, the processed plate material W can be moved and positioned along the work path line PL by moving the work carriage slider 7 in the X-axis coordinate direction. Further, since the upper die machining head 23 and the lower die machining head 25 are moved and positioned in the Y-axis coordinate direction, it is possible to perform punching on a predetermined portion of the machined plate material W.

Further, the processed plate material W is held in a suspended state by the work clamp 11 of the work carriage slider 7 and has no friction with other members. Therefore, the processed plate material W is rubbed with a free roller or the like as in the conventional case. W is not scratched or noise is generated.

Further, since the processed plate material W is suspended in the air, even if the processed plate material W projects downward due to the forming process, there is no interfering member and the movement of the processed plate material W is not hindered. This also enables downward molding.

On the other hand, FIG. 2 shows a work carriage slider 35 according to another embodiment.

A work clamp 37 for gripping the periphery of the work plate W is provided on the inner peripheral edge 35a of the work carriage slider 35 so as to approach and separate from the work plate W. Details of an example of the work clamp 37 are shown in Japanese Patent Application Laid-Open No. 3-60824, and therefore detailed description of the structure is omitted here.

On the inner peripheral edge 35a of the work carriage slider 35, a large number of work clamps 37 are arranged along the inner peripheral edge 35a via a work clamp retracting device 39 that moves the work clamp 37 toward and away from the work plate material W. Installed. At the position corresponding to each work clamp 37 in the upper part of the front surface (side surface of the processing plate W) of the work clamp retraction device 39, the work clamp 37 contacts with the upper mold processing head 23 so that the work clamp 37 and the upper mold processing head 23 contact each other. A dog 41 is provided for detecting that it has entered the interference area. A roller 43 is rotatably provided at the tip of the dog 41 and is provided for each work clamp 37, and the upper die machining head 2 is provided.
By contacting with 3, the detection body such as a limit switch (not shown) is operated.

Further, inside the work clamp retraction device 39, a clamp cylinder (not shown) for pushing out the work clamp 37 to the side of the work plate W and holding the work plate W by the work clamp 37, such as a hydraulic cylinder, which is not shown in the figure. Processed plate material W when pressure oil is discharged
And a return spring (not shown) for separating the work clamp 37 from the work plate W.

With the above configuration, when processing the periphery of the processed plate material W, the upper mold processing head 23 and the work clamp 37 are moved by moving the processed plate material W or the upper mold processing head 23. When it enters the interference area in which the abutting is made, the dog 41 abuts the upper die machining head 23 and operates the detection body. When the detection body discharges the pressure oil of the clamp cylinder and unclamps the processed plate material W, the work clamp 37 is drawn into the work clamp drawing device 39 by the return spring. After that, when the machining in the interference area is completed and the upper die machining head 23 comes out of the interference area, pressure oil is injected into the clamp cylinder again. The clamp cylinder pushes the work clamp 37 toward the work plate W side, and then re-clamps the work plate W by the work clamp 37.

Thus, when the upper die machining head 23 is placed in the interference region where it abuts the work clamp 37 when machining the periphery of the machined plate material W, the dog 41 causes the upper die machining head 23 to move. To unclamp and retract the work clamp 37 via the detection body by contacting the
It is possible to process up to the vicinity of the periphery of the processed plate material W without damaging the upper die processing head 23 and the work clamp 37.

As described above, the case where the work clamp 37 is continuously provided on the inner peripheral edge portion 35a of the work carriage slider 35 with substantially no gap is shown. However, the present invention is not limited to this, and the work clamp 37 is provided with an appropriate gap. You may equip it. Needless to say, in this case, the dogs 41 are also arranged at intervals.

The present invention is not limited to the above-mentioned embodiments, but can be carried out in other modes by making appropriate changes.

[0034]

The work table device of the punching machine according to the present invention is constructed as described above, and the frame-shaped work support portion provided in the horizontal state is provided so as to be reciprocally movable in the work carry-in direction. At the same time, the work clamps provided on the inner peripheral edge of the work supporting portion grip the periphery of the work plate material to suspend it at the work path line position. It is carried in or punched without coming into contact with. For this reason, it is possible to prevent the processed plate material from being scratched as in the conventional case, and no noise is generated due to contact with the free bearing or the like during movement.

Further, even when the forming process is performed downward, the convex portion protruding downward does not hit anything and does not support the movement of the processed plate material as in the conventional case. Molding can also be performed in the direction.

Further, since the work clamp is provided so as to be able to move toward and away from the work plate, the work clamp can be retracted when entering the interference area that contacts the work head when processing the periphery of the work plate. .. Therefore, it is possible to perform processing up to the vicinity of the periphery of the processed plate material without damaging the processing head and the work clamp.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire punching machine to which an embodiment of a work table device according to the present invention is applied.

FIG. 2 is a perspective view showing a main part of another embodiment of the work table device of the punching machine according to the present invention.

[Explanation of symbols]

 1 Punching Machine 7, 35 Work Carriage Slider (Work Support) 7a, 35a Inner Edge 11 37 Work Clamp 23 Upper Die Machining Head (Machining Head) 25 Lower Die Machining Head (Machining Head) W Machining Plate Material PL Work Path line

Claims (2)

[Claims] 1. A machining head provided above and below a work path line is moved and positioned in a direction perpendicular to a work carry-in direction, and a machined plate material held in a horizontal state is moved and positioned in a work carry-in direction for machining. A punching machine that performs reciprocating movement in the work-carrying-in direction and is provided horizontally in a frame-like work support part, and is provided on the inner peripheral edge of the work support part and suspends the work plate material in the work path line position. A work table device for a punching machine, comprising: a plurality of work clamps provided to hold a periphery of a work plate material so as to be supported horizontally in a state. 2. A work clamp for gripping the periphery of a work plate is provided so as to be able to move toward and away from the work plate so as to avoid the work head when the work clamp enters an interference area with the work head. Item 2. A work table device for a punching machine according to Item 1.