JPH02280932A - Device for catching and moving plate stock in metal plate working machine - Google Patents

Abstract

PURPOSE:To automatically catch and move a plate stock as occasion arises without preparing a program for catching and moving the plate stock in advance by providing a means for judging whether it should be moved or not and a means for catching and moving the plate stock. CONSTITUTION:Whether carriages 13, 14 can be moved or not so as to arrange the plate stock 11 to calculated coordinates is judges and if they can be moved, a carriage 7 and a cross slide 15 are driven and the plate stock 11 is arranged at a prescribed position. When it is judged that the carriage can not be moved, catching and moving the plate stock 11 by work holders 13, 14 are started. In this case, a reposition pad 50 which is moved by a cylinder upward and downward is lowered, the plate stock 11 is fixed to an upper and a lower frame 2, 3 and the plate stock 11 is removed once from being clamped by the work holders 13, 14. Then, a cross slide 15 is moved. Whether or not the plate stock 11 can be arranged to a coordinate position operated by clamping the plate stock 11 at the present positions of the holders 13, 14 is judged and when it is yes, the plate stock 11 is clamped to remove the pad 50.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plate material changing device, and particularly to a plate material changing device in a plate processing machine in which a plate material is moved by a work holder and processed by a processing head.

[Conventional technology]

Generally, a plate processing machine moves a plate while holding it with a work holder, and processes the plate with a processing head. The work holder is movably supported by a carriage placed on a table portion of the plate processing machine. By moving the work holder in the longitudinal direction of the carriage and moving the carriage in a direction perpendicular to the direction of movement of the work holder, the plate material can be placed at any position on a horizontal plane. A plate material placed at a predetermined position by movement of the carriage and work holder is subjected to a predetermined processing by a processing head.

[Problem to be solved by the invention]

The range in which the work holder can move on the carriage is limited. Therefore, depending on the processing position on the plate, the work holder may not be able to move and the plate may not be placed at the required position.

Therefore, in conventional plate processing machines, a workpiece re-gripping command is entered into the NC program in advance so that the workpiece holder can re-grasp the plate as necessary. In this case, when creating the NC program, it is necessary to always accurately recognize the position of the plate and the movable range of the work holder, and insert a plate change command into the NC program as necessary. For this reason, with conventional plate processing machines, creating an NC program is not easy and takes a long time.

An object of the present invention is to eliminate the need to insert a command for re-gripping operation by a work holder into an NC program, and to
It is an object of the present invention to provide a plate material changing device that facilitates the creation of a program.

[Means to solve the problem]

The plate material changing device according to the present invention is a plate material changing device in a plate material processing machine for moving a plate while holding it with a work holder and processing it with a processing head.

This plate material changing device includes a movability determination means and a plate material changing means. The movability determination means is a means for determining whether or not the work holder can be moved so as to arrange the plate at a desired position when the work holder moves the plate. The plate material changing means is a means for changing the gripping position of the work holder with respect to the plate material so that the plate material can be placed at a desired position when the movability determining means determines that the work holder cannot be moved.

[Effect]

In the plate material changing device according to the present invention, the movability determining means determines whether or not the work holder can be moved so as to arrange the plate material at a desired position when the work holder moves the plate material. When the movability determining means determines that the work holder cannot be moved, the plate material changing means changes the gripping position of the work holder relative to the plate material so that the plate material can be placed at a desired position.

As described above, according to the present invention, the plate material is automatically changed as needed without having to accurately program the plate material changing command in advance, thereby facilitating the creation of an NC program.

(Embodiment) FIGS. 1 and 2 show a punch press machine as a plate processing machine employing an embodiment of the present invention. In the figure, a punch press machine 1 mainly includes a lower frame 2, an upper frame 3 disposed above the lower frame 2, and a throat section 4 that supports these at the rear.

A fixed table 10 is arranged at the center of the upper surface of the lower frame 2. Furthermore, a pair of guide rails 5.6 are arranged on both sides of the upper surface of the lower frame 2. A carriage 7 is mounted on the guide rail 5.6 in the depth direction (Y
It is arranged so that it can move in the axial direction). Fixed to the carriage 7 are movable tables 8.9 disposed on both sides of the fixed table IO. The carriage 7 has a board 1
A cross slide 15 is provided with a pair of work holders 13 and 14 for gripping the workpiece 1 and is movable in the left-right direction (X-axis direction). A moving mechanism for moving the carriage 7 in the Y-axis direction is arranged below the moving table 9. The movement mechanism of the carriage 7 includes a servo motor 16, a ball screw 17 connected to the servo motor 16, and a ball nut 1-18 screwed into the ball screw 17. The ball nut 18 is fixed to the lower surface of the movable table 9. On the other hand, a moving mechanism for moving the cross slide 15 in the X-axis direction is arranged inside the carriage 7. The movement mechanism of the cross slide 15 is a carriage 7.
It consists of a servo motor 20 disposed at the left end of the motor, a ball screw 21 connected to the servo motor 20, and a pole nut 23 screwed into the ball screw 21. pole nut 2
3 is fixed to the cross slide 15.

The upper frame 3 is rotatably provided with an upper turret 12 on which a plurality of punches are mounted. Further, a punch head is provided within the upper frame 3 and is moved up and down by a crank mechanism (not shown). On the other hand, a lower turret 22 on which a plurality of dies are mounted is arranged on the lower frame 2 side.

The upper turret 12, lower turret 22, etc. constitute a machining section, and the machining position is indicated by A in FIG.

A control panel 30 is provided on the side of the throat portion 4.
is located. The control panel 30 includes an input keyboard 31, a CRT 32, a tape reader 33, a warning lamp 34, and the like. On the other hand, the work holders 13 and 14 are provided with proximity sensors (not shown) for detecting whether or not the plate 11 is present at the gripping position of the plate 11.

A control section 40 as shown in FIG. 3 is disposed within the throat section 4. As shown in FIG. The control unit 40 is a CPU.

It is equipped with a microcomputer consisting of ROM, RAM, etc. A keyboard 31, a tape reader 33, a proximity sensor 35 provided on the work holder 13-14, and other input units are connected to the control unit 40. Further, the control section 40 is connected to the servo motor 20, a warning buzzer and lamp 34, and other output sections.

The punch press machine 1 described above is controlled by the control unit 40 and operates as described below. Incidentally, FIGS. 4 and 5 are control flowcharts thereof.

When the main switch (not shown) of the punch press machine 1 is turned on, in step Sl in FIG. Next, in step S2, initial settings are made.
Wait for work start command. If a work start command is input from the keyboard 31, the process moves to step S3.

In step S3, the first command step of the NC program is read. In step S4, it is determined whether the read instruction step is a plate material movement instruction. If not, the process moves to step S5, and it is determined whether the command step is a punch operation command. In order, step S
In step S6, it is determined whether the command step is a reposition cancel command, and in step S7, it is determined whether the command step is for another process. Furthermore, in step S8, it is determined whether all command steps of the NC program have been processed. If there are still command steps remaining, the process returns to step S3 and the next command step is read.

If it is determined in step S4 that a command to move the plate material has been issued, the process moves to step S9 in FIG. 5.

In step S9, the movement coordinates of the plate material 11 are calculated based on the contents of the read instruction step. Next, in step SIO, it is determined whether the carriages 13, 14 are movable so as to place the plate 11 at the coordinates calculated in step S9. Carriage 13.14
If it is possible to move, the process moves to step Sll. In step Sll, the carriage 7 and the cross slide 15 are driven so that the plate 11 is placed at the calculated coordinates, and the plate 11 is placed at a predetermined position. Next, in step S12, the coordinates of the plate material 11 are stored in the memory, and the process returns to step S3 in FIG. 4.

On the other hand, if it is determined in step SIO that the carriage cannot be moved, the process moves to step S13. In step S13, the work holder 13.14
The repositioning (reposition) of the plate material 11 is started. In this case, the plate material 11 is fixed to the upper and lower frames 2.3 by lowering the reposition pad 50 (FIG. 1) which is moved up and down by a cylinder, and then the plate material 11 is moved by the work holder 13.14. Once the grip is released, the cross slide 15 is moved.

Meanwhile, in step 314, the work holder 13
．． Whether or not the plate material 11 exists at the clamp position of 14,
Proximity sensor 35 provided on work holder 13.14
Judging by. Subsequently, in step S15, it is determined whether or not the plate 11 can be placed at the calculated coordinate position by gripping the plate 11 at the current position of the work holders 13, 14. The determination in step S15 is Yes.
The processes of step S14 and step S15 are repeated until . Before the determination in step S15 becomes Yes, in step S14, the work holder 13.
If the plate material 11 no longer exists at the clamp position 14, the process moves to step S16.

In step S16, a warning process using the buzzer and lamp 34 is performed, and the program ends.

On the other hand, if the determination in step 315 is Yes, the process moves to step 317. In step S17, the cross slide 15 is stopped, the work holders 13 and 14 grip the plate material 11, and then the reposition pad 50 is released, thereby ending the reposition operation. Next, in step S18, the distance traveled by the work holder is stored. Then, the process moves to step Sll.

Through the processes from step S9 to step 31B described above, the gripping of the plate material 11 is automatically changed as necessary without programming the timing and position of changing the gripping of the plate material 11 in advance in the NC program.

If the instruction step read in step S3 in FIG. 4 is a punch operation instruction, the process moves from step S5 to step 319. In step S19, the punch and die according to the command are selected by rotating the turret 12.22. After performing a punching operation in step S20, the process returns to step S3. If the command step read in step 3 is a repository cancel command, step S6
Then, the process moves to step S21. In step S21,
The amount of movement of the work holder stored in step 318 is read from memory.

Then, in step S22, the gripping position of the work holder 13, 14 with respect to the plate material 11 is returned to the original gripping position based on the amount of movement. That is, a reposition cancel operation is performed in step S22, and then the process returns to step S3. Note that if the content of the command step in step S3 is other processing, step S
7, the process moves to step S23, and after performing other processing according to the contents of the command, the process returns to step S3.

It should be noted that the above-mentioned reposition canceling operation is an operation that is performed in a completely reverse order to the above-mentioned repositioning operation.

By normal repositioning, the plate material is gripped at a position offset with respect to the cross slide 15. However, if left as is, it may become impossible to pass the plate material to the unloading device waiting at a fixed position with respect to the punch press machine l. In such a case, a reposition cancellation operation is performed. The command for this reposition canceling operation is written in advance in the NC program as an M code command.

[Effects of the Invention] According to the plate material changing device according to the present invention, since the movability determination means and the plate material changing means are provided as described above, there is no need to program the plate material changing in advance. It will be possible to automatically change the plate material according to the situation. Therefore, the worker's NC
The effort required to create a program is reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a punch press machine employing an embodiment of the present invention, Fig. 2 is a partial plan view thereof, Fig. 3 is a schematic block diagram of its control section, and Figs. 4 and 5 are its It is a control flowchart. 11... Plate material, 13.14... Work holder, A
...Processing position. Patent applicant Yukio Ono, representative of Murata Machinery Co., Ltd., patent attorney

Claims (1)

[Claims] (1) Move the plate while holding it with a work holder,
A plate material changing device in a plate material processing machine for processing with a processing head, the movement of which determines whether or not the work holder can be moved to place the plate material at a desired position when the plate material is moved by the work holder. When it is determined by the movability determining means and the movability determining means that the work holder cannot be moved,
A plate material grip changing device for a plate material processing machine, comprising a plate material grip changing means for changing the gripping position of a work holder with respect to the plate material so that the plate material can be placed at a desired position.