JP2001018020A - Method for controlling repositioning operation in turret punch press and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the interference of a special die with a work clamp at the time of repositioning operation. SOLUTION: A work clamped with the work clamp is moved and positioned and punching is executed by cooperation of punches and dies mounted to many turret stations provided on an upper and lower turrets. The turret station to which the special die is alotted is beforhand registered on a controller. When a repositioning command is imparted from the controller on the basis of a working program, whether the die in the working position is the special die is judged (Step 1). When it is the special die, whether the repositioning operation is to be executed in the vicinity of the working position is judged (S2). When the operation is to be executed in the vicinity of the working position, by rotating the upper and lower turrets, the special die is temporarily retreated into the retreating position where the die does not interfere with the work clamp (S3). Next, the repositioning operation is executed (S4) and, after completing the operation, the special die is returned to the working position (S5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for controlling a repositioning operation in a turret punch press.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press 101, as shown in FIG.
The workpiece W clamped by the turret 3 is moved and positioned to the punching position, and the punches P mounted on a number of turret stations provided on the upper turret 105 and the dies mounted on a number of turret stations provided on the lower turret 107. Punching is performed in cooperation with D.

[0003] When a workpiece W is processed beyond the possible processing range (X-axis direction) of the turret punch press 101, a repositioning function is used to cover the unworkable range.

[0004] This repositioning function is performed after the work W is mechanically held, for example, by being sucked by a work holding device 111 such as a suction pad provided on the processing table 109, and then the work W is clamped. After being released from the work 103, the operation of moving the work clamp 103 in the X-axis direction and clamping the work W again (replacement operation, so-called repositioning operation) is performed.

[0005] Depending on the programming method, the work clamp 103 may not be able to reposition the work W
When the turret is moved in the X-axis direction after the release, the upper turret 105 and the lower turrets 105,
7 may pass through the feed clearance.

[0006]

By the way, in the conventional repositioning operation, if the work clamp 103 is programmed to pass through the feed clearance of the turrets 105 and 107 as described above, the work clamp 103 is currently selected. When the mold is a special mold Ps protruding into the feed clearance of the turrets 105 and 107, as shown in FIGS.
There is a problem that the projecting portion of s interferes with the work clamp 103, and both may be damaged.

By the way, the normal punch P is contained within the thickness of the upper turret 105, but the special mold Ps which is a problem here is that it is located below the ram 113 which is pressed like a tapping mold. 8, a mold that projects from the lower surface of the upper turret 105 into the feed clearance as shown in FIG.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to control a repositioning operation in a turret punch press which can avoid interference between a special mold and a work clamp during a repositioning operation. It is to provide the device.

[0009]

According to a first aspect of the present invention, there is provided a method for controlling a repositioning operation in a turret punch press according to the present invention. When performing punching work in cooperation with the punches mounted on a number of turret stations provided in the turret and the dies mounted on the number of turret stations provided on the lower turret, the distance between the upper turret and the lower turret is The turret station to which the special mold projecting to the feed clearance is allocated is registered in the control device in advance, and when the work repositioning command is given from the control device based on the processing program, the turret station is selected as the processing position. Whether the mold of the turret station is the special mold Judgment, when it is determined that the special mold, when it is determined whether to perform a repositioning operation near the processing position of the upper and lower turret, when it is determined to perform near the processing position By rotating the upper and lower turrets, the special mold is temporarily retracted to a retracted position that does not interfere with the work clamp, and a repositioning operation is performed. After the repositioning operation is completed, the upper and lower turrets are rotated. In this case, the retracted special mold is returned to the processing position.

Therefore, by registering the special mold in the control device, it is identified whether the mold of the turret station currently selected as the machining position is the special mold, and repositioning is performed in the turret machining position. It is checked whether or not the processing is performed in the vicinity of, so that the control of the repositioning operation is realized only by changing the machining program in the control device. Further, the operator does not need to be aware of the machining program, but only registers the special mold, thereby avoiding interference between the mold and the work clamp in the repositioning function.

According to a second aspect of the present invention, there is provided a control device for a repositioning operation in a turret punch press according to the present invention, comprising: a work movement positioning device having a work clamp for clamping a work; In a turret punch press including a lower turret provided with a number of turret stations for mounting a die for performing punching in cooperation with the punch of the upper turret, a processing program including a work repositioning command is stored. A machining program file, a special mold information file storing a turret station to which a special mold projecting to the feed clearance between the upper turret and the lower turret is allocated, and a work repo based on the machining program. When a positioning command is given, a special mold presence / absence determining unit that determines whether the mold of the turret station selected at the processing position is the special mold, and performs a repositioning operation near the processing position. A repositioning position determining unit for determining whether or not to perform the repositioning operation by rotating the upper and lower turrets to temporarily retract the special mold to a retracting position that does not interfere with the work clamp; After the positioning operation is completed, a control device including a repositioning command unit for rotating the upper and lower turrets to return the retracted special mold to the original position is provided.

Therefore, the operation is the same as that of the first aspect. By registering the special mold in the control device, it is determined whether the mold of the turret station currently selected at the processing position is the special mold. Since it is identified and whether or not repositioning is performed in the vicinity of the processing position of the turret, it is possible to control the repositioning operation only by changing the processing program in the control device. Further, the operator does not need to be aware of the machining program, but only registers the special mold, thereby avoiding interference between the mold and the work clamp in the repositioning function.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for controlling a repositioning operation in a turret punch press and an apparatus therefor according to the present invention will be described below with reference to the drawings.

Referring to FIGS. 2 and 3, a turret punch press 1 according to the present embodiment has an aspect in which both sides of an upper frame 9 are supported by side frames 5 and 7 erected on both sides of a base 3. The main body frame 11 is configured. In the lower part of the upper frame 9, various types of punches P
A disk-shaped upper turret 13 is provided rotatably.

On the upper surface of the base 3, a lower turret 15 facing the upper turret 13 is rotatably mounted. On the lower turret 15, a large number of dies D facing various types of punches P are formed in an arc shape. And are detachably mounted. The axis of the upper turret 13 and the axis of the lower turret 15 are arranged on the same axis, and the upper turret 13 and the lower turret 15 are connected to a turret from a CNC device 17 (see FIG. 4) as a control device. A command is generated, for example, by a T-axis servo motor 19 as a rotation driving unit, and the rotation is synchronously performed in the same direction via a rotation driving transmission unit such as various gears 21.

A ram 23 is mounted on the lower surface of the upper frame 9 at a substantially central portion thereof so as to be vertically movable. The punch P indexed and positioned below the ram 23 by the rotation of the upper turret 13 and the lower turret 15
Pressed by.

As a press driving means for moving the ram 23 up and down, for example, the ram 23 is connected via a connecting rod (not shown) to a crankshaft 25 which is horizontally supported on a frame. Further, a flywheel 27 is engaged with and disengaged from one end of the crankshaft 25 via a clutch mechanism. The flywheel 27 rotates the belt 29, the pulley 31 and the like as shown in FIG. It is rotated by, for example, a press motor 33 as a press rotation driving means via a force transmission means.

Therefore, the rotational force of the flywheel 27 is transmitted to the crankshaft 25 by the operation of the clutch mechanism, and the rotation of the crankshaft 25 causes the ram 23 to move up and down via the connecting rod. The plate-shaped workpiece W that has been hit and moved to the processing position K is punched by the cooperation of the punch P and the die D.

The turret punch press 1 is provided with a work movement positioning device 35 for moving and positioning the work W in the front, rear, left and right directions, and the work W is held by the work clamp 37. The work movement positioning device 35 is controlled by the CNC device 17 to position the work W at an appropriate position between the punch P and the die D.

The work movement positioning device 35 is disposed on the lower right side of the turret punch press 1 in FIG.
The workpiece movement positioning device 35 includes a plurality of workpiece clamps 3.
And a carriage base 39 having a length substantially equal to the entire machine width of the turret punch press 1 is provided movably in the Y-axis direction on a carriage base linear guide 43 provided on the table frame 41. ing.
The carriage base 39 is connected to the Y-axis feed ball screw 45
For example, a Y-axis servo motor 47 as a driving means for axis feed
Are provided so as to be movable in the Y-axis direction by a Y-axis feed mechanism comprising The Y-axis servo motor 47 is electrically connected to the CNC device 17 as shown in FIG.

The carriage base 39 can be moved from the right side in FIG. 3 to a machining position K on a horizontally installed center table 49, and a side table 51 is provided below the carriage base 39. The carriage base 39 is fixed so as to be divided into right and left sides, and is movable in the Y-axis direction as the carriage base 39 moves.

The carriage base 39 has a carriage linear guide 53 on its side facing the turret punch press 1.
2 is provided as shown in FIG. 2. A carriage 55 having the work clamp 37 is provided on a side surface of the carriage base 39 with a linear guide 53 for the carriage.
Is slidably provided in the X-axis direction.

A carriage ball screw 57 provided on the side of the carriage base 39 substantially through the center of the carriage 55 is arranged as shown in FIG. For example X as
It is driven and rotated by a shaft servomotor 61. College 55
By rotating the carriage ball screw 57, the so-called X-axis movement is freely performed in the length direction of the carriage base 39, and the work W is positioned and fed in the X-axis direction. Note that X
The axis servo motor 61 is a CNC as shown in FIG.
It is electrically connected to the device 17.

As described above, the punch P mounted on the turret punch press 1 and the die D mounted on the lower turret 15
After the plate-shaped work W is positioned in between, the punch P is pressed by the ram 23 so that the work W is punched by the cooperation of the punch P and the die D.

When a workpiece W is processed beyond the possible processing range (X-axis direction) of the turret punch press 1,
A repositioning function is used to cover the unworkable range.

In this repositioning function, the work W is temporarily stored in the center table 4 as shown in FIG.
After being mechanically held by being sucked by a work holding device 63 such as a suction pad provided on the work 9, the work W is released from the work clamp 37, then moved in the X-axis direction and moved again. An operation of clamping W (gripping operation, so-called repositioning operation) is performed.

Depending on the programming method used, the repositioning operation may be performed between the upper turret 13 and the lower turret 15 as shown in FIG. 5 when the work clamp 37 moves in the X-axis direction after releasing the work W. May pass through feed clearance.

Referring to FIG. 4, in the CNC device 17, an input device 67 such as a keyboard and a display device 69 such as a CRT are electrically connected to a CPU 65 as a central processing unit.

The CPU 65 has an input device 6.
7, a machining program file 71 for storing data such as a machining program including a repositioning command of the work W input from the upper turret 13 and the lower turret 1
5 is electrically connected to a special mold information file 73 that stores a turret station to which a special mold Ps protruding to the feed clearance between the turret stations is allocated.

When a repositioning command for the workpiece W is given to the CPU 65 based on the machining program, the CPU 65 determines whether or not the currently selected mold of the turret station is the special mold Ps. A special mold presence / absence determining unit 75, a repositioning position determining unit 77 for determining whether or not to perform a repositioning operation near the turrets 13 and 15, and a special mold Ps by rotating the upper and lower turrets 13 and 15. Is temporarily retracted to a retracted position where it does not interfere with the work clamp 37, and a repositioning operation is performed. After the repositioning operation is completed, the upper and lower turrets 13, 15 return the retracted special mold Ps to the original position. Is electrically connected to a repositioning command unit 79 for rotating the.

According to the above configuration, when punching is performed, the turret T number to which the special mold Ps projecting to the feed clearance between the upper turret 13 and the lower turret 15 is allocated is determined in advance by the CNC device 1.
7 and is registered in the special mold information file 73.

When the repositioning command of the work W is read based on the machining program in the machining program file 71, the mold attached to the turret station T number currently selected by the special mold presence / absence judging section 75. Is determined to be a special mold Ps (step S1).

If it is determined in step S1 that the mold mounted on the currently selected turret station T number is not the special mold Ps, the repositioning command unit 79 instructs the X-axis servo motor 61. And the repositioning operation is executed (step S1).
And S6).

When it is determined in step S1 that the die mounted on the turret station T number currently selected is the special die Ps, the repositioning position determining section 77 determines the Y-axis of the work clamp 37. Current value is confirmed and repositioning operation is turret 1
It is determined whether or not the processing is performed in the vicinity of the processing positions 3 and 15 (step S2).

If it is determined in step S2 that the repositioning operation is not performed in the vicinity of the machining position K of the turrets 13, 15, a command is given to the X-axis servomotor 61 by the repositioning command unit 79, and the repositioning command is sent to the X-axis servomotor 61. A positioning operation is performed (steps S2 and S6).

When it is determined in step S2 that the repositioning operation is performed in the vicinity of the machining position K of the turrets 13, 15, a command is given to the T-axis servomotor 19 to cause the upper and lower turrets 13, 15 to move. The special mold Ps is rotated from the machining position K to the work clamp 37.
Is temporarily retracted to the retreat position R which does not interfere with the operation. Thereafter, a command is given to the X-axis servomotor 61 by the repositioning command unit 79 to perform a repositioning operation (steps S3 and S4).

After the repositioning operation is completed in step S4, the special mold Ps retreated to the retreat position R
Is returned to the machining position K, a command is given to the T-axis servomotor 19, the upper and lower turrets 13 and 15 are rotated, and the special mold Ps is returned from the retreat position R to the original machining position K. The repositioning command ends (step S5).

As described above, by registering the special mold Ps in the CNC device 17, the CNC device 17 can identify whether the currently selected mold is the special mold Ps, and the repositioning is performed by the turret. Since it is checked whether or not the processing is performed in the vicinity of the processing position K of the CNC apparatus 13 or 15,
The control of the repositioning operation can be realized only by changing the machining program inside. Also, the operator simply registers the special mold Ps without being aware of the machining program,
Die and work clamp 3 in repositioning function
7 can be avoided.

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

[0040]

As will be understood from the above description of the embodiments of the present invention, according to the first aspect of the present invention, the special die is registered in the control device, thereby selecting the current processing position. It is possible to identify whether or not the mold of the turret station is a special mold, and to check whether the repositioning operation is performed near the machining position of the turret, so only by changing the machining program in the control device Control of the repositioning operation can be realized. Further, the operator can reliably avoid interference between the mold and the work clamp in the repositioning function only by registering the special mold without being conscious of the machining program.

According to the second aspect of the present invention, it is the same as the effect of the first aspect, and by registering the special mold in the control device, the mold of the turret station currently selected as the processing position. Can be identified as a special mold, and whether the repositioning operation is performed near the turret processing position can be checked. Therefore, the repositioning operation can be controlled only by changing the processing program in the control device. . Further, the operator can reliably avoid interference between the mold and the work clamp in the repositioning function only by registering the special mold without being conscious of the machining program.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a flowchart of a repositioning operation.

FIG. 2, showing an embodiment of the present invention, is a side view of a turret punch press.

FIG. 3, showing an embodiment of the present invention, is a plan view of a turret punch press.

FIG. 4 is a block diagram of a control device.

FIG. 5 illustrates an embodiment of the present invention and is an explanatory diagram of a repositioning operation.

FIG. 6 is an explanatory diagram of a conventional repositioning operation.

FIG. 7 is an explanatory view of a collision state between a work clamp and a special mold during a conventional repositioning operation.

FIG. 8 is a side view of FIG. 7;

[Explanation of symbols]

 Reference Signs List 1 turret punch press 13 upper turret 15 lower turret 17 CNC device (control device) 19 T-axis servo motor 35 work movement positioning device 37 work clamp 47 Y-axis servo motor 61 X-axis servo motor 63 work holding device 65 CPU (central processing unit) ) 71 Machining program file 73 Special mold information file 75 Special mold presence / absence judgment section 77 Repositioning position judgment section 79 Repositioning command section

Claims (2)

[Claims] A work clamped by a work clamp is moved and positioned, and a punch mounted on a plurality of turret stations provided on an upper turret and a die mounted on a plurality of turret stations provided on a lower turret. When performing punching by cooperation, a turret station to which a special mold projecting to the feed clearance between the upper turret and the lower turret is allocated in advance in the control device and controlled based on the processing program When a repositioning command of the work is given from the apparatus, it is determined whether or not the mold of the turret station selected at the processing position is the special mold, and when it is determined that the special mold is used, Whether to perform repositioning operation near the processing position of the upper and lower turrets When it is determined that the processing is performed in the vicinity of the processing position, the upper and lower turrets are rotated to temporarily retract the special mold to a retracting position that does not interfere with the work clamp, thereby performing a repositioning operation. And performing a repositioning operation in the turret punch press by rotating the upper and lower turrets to return the retracted special mold to a processing position after completing the repositioning operation. 2. A work moving / positioning device having a work clamp for clamping a work, an upper turret having a number of turret stations for mounting a punch, and a die for performing punching in cooperation with the punch of the upper turret. In a turret punch press including a lower turret having a large number of turret stations to be mounted, a processing program file storing a processing program including a work repositioning command, a feed clearance between the upper turret and the lower turret A special mold information file that stores a turret station to which a special mold protruding is assigned, and a turret selected as a machining position when a work repositioning command is given based on the machining program. Station gold A special mold presence / absence determination unit that determines whether the die is the special mold, a repositioning position determination unit that determines whether to perform a repositioning operation near the processing position, and the upper and lower turrets. The special mold is rotated and temporarily retracted to a retracted position where it does not interfere with the work clamp to perform a repositioning operation, and after the repositioning operation is completed, the upper and lower parts are returned to return the retracted special mold to its original position. A control device for a repositioning operation in a turret punch press, comprising a control device including a repositioning command unit for rotating a lower turret.