JPH11729A - Method for preventing interference between work moving/positioning device and unloader device in metal plate working machine and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent collision between a work moving/positioning device and an unloader device and breakage of equipment caused by the collision. SOLUTION: On the rear face of a movable table 19 having the work moving/ positioning device 26, plural dogs 77 which are arranged in parallel in the direction of an axis (X-axis), different in length and stretched in the direction of the other axis (Y-axis) are stepwise provided and plural detectors 81 for detecting these dogs 77 are provided on an intermediate table 41. By detecting the dogs 77 which are respectively situated with plural detectors 81, the moving positions of the movable tables 19, 21 are recognized and, by discriminating the interference between the work moving/positioning device 26 and the unloader device 45, the interference is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for preventing interference between a workpiece movement positioning device and an unloader device in a plate processing machine.

[0002]

2. Description of the Related Art Conventionally, in a plate processing machine such as an NC turret punch or a laser processing machine, a work table provided with a work movement positioning device for gripping and moving a work and a product processed by the plate processing machine are carried out. An unloader device is provided for performing the operation.

More specifically, as shown in FIG. 6, a turret punch press 101 is provided with a gate-shaped frame 10.
3 and a plurality of punches P
Is provided rotatably, and a lower turret 107 provided with a plurality of dies D is provided below the upper turret 105 so as to be rotatable in synchronization with each other.

A work movement positioning device 109 for gripping and moving the work W is provided, and a carriage base 111 constituting the work movement positioning device 109 extends in the X-axis direction (vertical direction in FIG. 6). The carriage base 111 is provided with a carriage (not shown), and the carriage is provided with a clamp 113 for gripping the work W.

[0005] A reflector 115 is provided at an end of the carriage base 111, and a photoelectric sensor 117 for irradiating the reflector 115 with an optical axis is mounted on the tip of an unloader 119. Reference numeral 121 is a work table.

With the above configuration, the turret punch press 1
When the unloader 119 is moved closer to the turret punch press 101 in order to carry out the product processed in step 01, the optical axis of the photoelectric sensor 117 provided on the unloader 119 is irradiated on the reflector 115 provided on the carriage base 111. And then see each other's interference.

[0007]

By the way, the work movement positioning device 109 in the above-mentioned conventional plate processing machine.
As a means for preventing the interference between the reflection plate 115 and the unloader 119, the reflection is performed by the reflector 115 and the photoelectric sensor 117, but the sensing cannot be performed unless the photoelectric sensor 117 approaches the reflector 115. For this reason, there is a problem that the workpiece movement positioning device 109 and the unloader 119 are damaged by collision, and there is also a problem that there are many malfunctions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for preventing interference between a work movement positioning device and an unloader device in a plate processing machine which prevents collision between the work movement positioning device and an unloader device and breakage of equipment due to the collision. Is to provide.

[0009]

According to a first aspect of the present invention, there is provided a method for preventing interference between a workpiece movement positioning device and an unloader device in a plate processing machine according to the present invention. In the method for preventing interference between a work movement positioning device and an unloader device provided in a direction orthogonal to the movement direction of the work movement positioning device, (A) detecting and discriminating an actual position of the work movement positioning device with a detector. Discrimination process.

(B) The position of the workpiece movement positioning device determined in the determination step is compared with the current position of the unloader device in the same direction to determine interference when the unloader device approaches the plate processing machine. Interference determination step.

(C) An interlock operation step of interlocking a drive source for approaching the unloader device to the plate material processing machine when interference is predicted in the interference determination step.

It is characterized by comprising:

According to a second aspect of the present invention, there is provided a plate material processing machine with a work movement positioning device and an unloader device, wherein the device for preventing interference between the unloader device and the workpiece movement positioning device is movable in one axis direction toward a processing position of the plate material processing machine. A work table is provided, and the unloader device that is movable in the one axis direction and the other axis direction orthogonal to the one axis direction is provided. Detected members of different lengths extending in the direction are provided in stages, and a plurality of detectors for detecting the detected members by the same number as the number of rows in the other axial direction of the detected members are provided as the plurality of detected members. A table position determination unit provided on the base in correspondence with the position of the work table, and determining the position of a work table provided with the work movement positioning device; A table for determining interference with the unloader, an unloader interference determiner, and an interlock operation for stopping movement of the unloader in the other axial direction when the table and the unloader interference determiner determine that the unloader interferes with the table. A control device including a circuit is provided.

Therefore, the actual position of the workpiece movement positioning device provided in the plate processing machine is detected by the detector, and the actual position of the unloader is compared with the current position of the unloader to determine interference when the unloader approaches the plate processing machine. If interference is predicted, an interlock is applied to a drive source for approaching the unloader device to the plate material processing machine.

Thus, it is possible to prevent collision between the workpiece movement positioning device and the unloader device and to prevent damage to the equipment due to the collision.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. Although a turret punch press will be described as an example of a plate processing machine, the present invention is not limited to this model, and a laser processing machine or the like can be used, and a turret punch press, a work movement positioning device,
Since the unloader device has a known structure, detailed illustration and description are omitted.

Referring to FIGS. 1 and 2, an upper turret 7 and a lower turret 9 which are rotatable by a drive device (not shown) are respectively provided on an upper frame 3 and a lower frame 5 of a turret punch press 1 as a plate processing machine. Is supported. On the circumferences of the upper turret 7 and the lower turret 9, various pairs of punches 11 and dies 13 are mounted. The processing position is indicated by K.

The upper frame 3 is provided with a ram 15 which can be moved up and down by a drive device not shown in FIG.

With the above structure, the upper turret 7 and the lower turret 9 are rotated and driven immediately below the ram 15 so that the desired pair of punches 11 and dies 13 are positioned at the processing position K, and the workpiece W is punched. Processing is performed.

The lower turret 9 is surrounded by a Y-axis direction (FIG. 2).
The fixed table 17 is provided extending to the lower side of the movable table 1 on both sides of the fixed table 17.
9 and 21 are provided. This movable table 19, 2
Reference numeral 1 denotes a guide rail 23 provided on the lower frame 5 so as to extend in the Y-axis direction (a direction perpendicular to the drawing in FIG. 1 and a vertical direction in FIG. 2). ing.

The movable tables 19 and 21 have a carriage base 2 as a work movement positioning device 26.
The carriage 2 is provided integrally with the fixed table 17 so as to be movable in the X-axis direction (the left-right direction in FIGS. 1 and 2).
9 are provided. The carriage 29 is movable in the X-axis direction via a nut member (not shown) on a feed screw 31 extending in the X-axis direction. A motor 33 is connected to one end of the feed screw 31. And, College 29
Is mounted with a clamp 35 for gripping a plurality of works W.

With the above configuration, when the motor 33 is driven, the feed screw 31 rotates, and the carriage 29 moves in the X-axis direction via a nut member screwed to the feed screw 31. The work W gripped by the clamp 35 provided in the carriage 29 also moves in the X-axis direction.

A feed screw 37 extending in the Y-axis direction is provided substantially at the center of the carriage base 27, and the carriage base moves in the Y-axis direction via a nut member (not shown). The feed screw 3
A motor 39 is connected to one end of the motor 7.

With the above configuration, when the motor 39 is driven, the feed screw 37 rotates, and the carriage base 27 is moved in the Y-axis direction via a nut member screwed to the feed screw 37, and the carriage 39 is moved. The movable tables 19 and 21 provided integrally with the base 27 are also moved in the Y-axis direction.

Thus, the workpiece W gripped by the clamp 35 is moved in the X and Y axis directions, and the desired processing position of the workpiece W is set at the position immediately below the ram 15 such as the punch 11 and the die 1.
3 and the punching process is performed.

An intermediate table 41 is provided adjacent to the movable table 19 as a base.
1, an integrated lifter 43 is provided. Although not shown, the integrated lifter 43 can be moved up and down by a fluid-operated cylinder, and the product Ws is to be loaded on a pallet.

An unloader device 45 is provided for loading the product Ws on the integrated lifter 43. The unloader device 45 is provided on a support 49 having a rail member 47, and the unloader body 51 is connected to the rail member 47. Are movable in the X-axis direction by driving a pinion 55 that meshes with a rack 53 provided in the rack. The pinion 55
The rotation is transmitted from the X-axis driving motor 57 provided on the unloader main body 51 via the rotation transmitting member 59.

Further, a loader beam 61 hanging down from the unloader body 51 is provided so as to move in the vertical direction by expansion and contraction of the vertical cylinder 63. The loader beam 61 has a plurality of vacuums for sucking and holding the product Ws. The pad 65 and the magnet 67 are provided to hang down. Further, the screw rod 73 of the loader beam 61 is rotated by a Y-axis drive motor 69 provided on the unloader main body 51 via a rotation transmitting member 71, and the loader beam 61 is moved in the Y-axis direction via a nut member (not shown). It becomes movable.

With the above configuration, when the X-axis drive motor 57 is rotated, the pinion 55 is rotated via the rotation transmitting member 59, and the unloader main body 51 is moved in the X-axis direction by the rack 53 provided on the rail member 47, and is processed. Product W
s can be unloaded and loaded on the integrated lifter 43.
When the Y-axis drive motor 69 is rotated, the screw rod 73 is rotated via the rotation transmitting member 71, and the loader beam 61 is moved and positioned in the Y-axis direction via a nut member screwed to the screw rod 73. You.

Further, the operation of the upper and lower cylinders 63 causes the loader beam 61 to move up and down.
The product Ws is sucked and held by the vacuum pad 65 and the magnet 67 provided in.

Next, an interference preventing device 75 for preventing the loader beam 61 from interfering with the carriage base 27, which is the work movement positioning device 26, which is a main part of the present invention.
For example, five dogs 77 as members to be detected are provided in parallel on the back surface of the movable table 19 in the X-axis direction, and each row is attached in consideration of the length and arrangement position in the Y-axis direction. A stay 79 is provided so as to protrude from the intermediate table 41. On this stay 79, for example, a limit switch or a proximity sensor, which is a detector 81, is the same as the number of rows of the dog 77 in the X-axis direction. Is provided so that it can be detected.

More specifically, an example shown in FIG. 3 will be described. The number arrangement of the dogs 77 and the number of the detectors 81 are not limited to the example of this embodiment. That is, the dog 77 provided on the back surface of the movable table 19 is provided with five dogs 77A to 77E in a stepwise manner.
The detector 81 is connected to the stay 79 in parallel with
A to 81E were provided. Then, the detectors 81A to 81E are No. 1 to No. 5, the distance from the position of the movable table 19, that is, the reference position of the carriage base 27 to the contact position of the detector 81 is, for example, a maximum of 1520 mm.
And

Therefore, as shown in FIG.
With respect to the position of the movable table 19, a range in which the loader beam 61 of the unloader device 45 can advance in the Y-axis direction can be set. Note that the ON state of the detector 81 in FIG.
And the OFF state is 0.

That is, when all of the detectors 81A to 81E are in the OFF state, the position range in which the loader beam 61 can advance in the X-axis direction in the Y-axis direction is 0 to 1000 mm. The position range of the Y-axis direction in which the beam 61 can advance in the X-axis direction is 0 to 730 mm (in FIG. 3, the position of the detector 81 is 0 mm, that is, the carriage base 27 can be closest to the processing position K. The table in FIG. 4 shows the positions of the carriage base 27 and the loader beam 61 to the left from the reference position in FIG. 3). Then, the detectors 81B to 81E are successively provided.
Is turned ON, the Y-axis direction position range in which the loader beam 61 can advance in the X-axis direction is set as shown in the numerical values shown in FIG.

Accordingly, the loader beam 61 is moved within the Y-axis position range in which the loader beam 61 can advance in the X-axis direction.
If there is a shaft, the unloader main body 51 is placed in the movable table 19.
Can enter.

Next, the control device 83 will be described.

Referring to FIG. 5, a detection signal is input from each detector 81 to a table position discriminating section 85, and the table position is discriminated from the table position discriminating section 85.
It is input to the unloader interference determination unit 87. On the other hand, the movement position of the loader beam 61 in the Y-axis direction is input to the table and the unloader interference determination unit 87 by an encoder provided on a Y-axis drive motor 69 provided on the unloader main body 51. Then, the signal determined by the table / unloader interference determination unit 87 is input to the interlock operation circuit 89, and when they do not interfere with each other, the X-axis drive motor 57 provided on the unloader main body 51 is driven to drive the unloader main body 51. Move forward to start product unloading operation.

If the two interfere with each other, the X-axis drive motor 57 is interlocked by the interlock
Is not driven.

Thus, the interlock can be seen only on the unloader side, and interference can be confirmed before the operation.

As described above, the amount of movement of the movable tables 19 and 21 provided integrally with the workpiece movement positioning device 26 is determined by the detector 81 which detects a plurality of dogs 77 provided on the back surface of the movable table 19. Since the interlock is established by recognizing the collision, the collision between the carriage base 27 and the loader beam 61 of the unloader device 45 can be prevented, and the damage of the equipment due to the collision can be prevented.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0042]

As will be understood from the above description of the embodiments of the present invention, according to the present invention according to the first and second aspects, the actual position of the workpiece movement positioning device provided in the plate processing machine is detected by the detector. , And compares the current position of the unloader device with the current position of the unloader device to determine interference when the unloader device approaches the plate material processing machine. When interference is predicted, an interlock is applied to a drive source for approaching the unloader device to the plate material processing machine side.

Thus, it is possible to prevent a collision between the workpiece movement positioning device and the unloader device and to prevent damage to the equipment due to the collision.

[Brief description of the drawings]

FIG. 1 is a front view showing a sheet material processing machine and an unloader device.

FIG. 2 is a plan view of FIG.

FIG. 3 is an explanatory plan view showing an interference prevention device.

FIG. 4 is an operation explanatory view.

FIG. 5 is a control block diagram.

FIG. 6 is an explanatory perspective view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 turret punch press (plate processing machine) 19 movable table (work table) 26 work movement positioning device 41 intermediate table (base) 45 unloader device 75 interference prevention device 77 dog (detected member) 81 detector 83 control device 85 table Position discriminator 87 Table / unloader interference discriminator 89 Interlock operation circuit

Claims (2)

[Claims] 1. A method for preventing interference between a work moving positioning device provided on a work table of a plate material processing machine and an unloader device provided in a direction orthogonal to a moving direction of the work moving positioning device, wherein: A determining step of detecting and determining the actual position of the positioning device by a detector; (B) interference determination for comparing the position of the workpiece movement positioning device determined in the determination step with the current position of the unloader device in the same direction, and determining interference when the unloader device approaches the plate material processing machine. Process. (C) An interlock operation step of interlocking a drive source for approaching the unloader device to the sheet material processing machine when interference is predicted in the interference determination step. A method for preventing interference between a workpiece movement positioning device and an unloader device in a plate material processing machine, characterized by comprising: 2. A work table provided with a work movement positioning device which is movable in one axis direction toward a processing position of a plate material processing machine, and is movable in the one axis direction and another axis direction orthogonal to the one axis direction. An unloader device is provided, and a plurality of detection members having different lengths arranged in parallel in the other axis direction and extending in the uniaxial direction are provided on the back surface of the work table on the unloader device side in a stepwise manner. A plurality of detectors for detecting the detected members by the same number as the number of rows are provided on the base in correspondence with the positions of the detected members, and the position of the work table provided with the work moving positioning device is determined. A table position determining unit that performs interference between the table and the unloader device;
A control device including an unloader interference determination unit and an interlock operation circuit for stopping movement of the unloader device in the other axis direction when the table and the unloader interference determination unit determine that the unloader device interferes with the table; A device for preventing interference between a work movement positioning device and an unloader device, comprising: