JP2000288650A - Method and device for working speed adjustment in plate working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency by shortening a time required for external deceleration in the X, Y axis directions in a moving speed of a clamp device in an external deceleration region. SOLUTION: By moving a carriage 41 arranged with a clamp device 23 (23A, 23B) in the left/right direction (X direction) with a carriage base 35 and the carriage base 35 in the back/forth direction (Y direction), a work W clamped to the clamp device 23 is positioned to a working part K of a plate working machine, working is conducted. The clamp device 23, when working a first sheet of the work W in a same working program, is not intruded into a dead zone DZ, further, when a moving locus of the clamp device 23 is not changed between a normal time and a deceleration time in an external deceleration region OZ, even when the clamp device 23 is intrudes into the external deceleration region OZ in working a second sheet and thereafter, the clamp device is not intruded into the dead zone DZ, thus, plate working is conducted at high speed without an external deceleration processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for adjusting a processing speed in a plate processing machine such as a punch press.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press as a plate processing machine, for example, in the case of a hydraulic press, a punch is generally raised slightly above a position where the workpiece W is pressed (first upper end) in order to improve a hit rate. (Dead point), but as shown in FIG. 7, a region in the X-axis and Y-axis directions corresponding to the diameter of a die formed of a punch and a die under the ram at the punching position K, in other words, a dead zone Clamping device 1 for DZ
01A and 101B move, the clamping device 101
A and 101B collide with the mold.

For this reason, when a plurality of workpieces W are processed by the same program using a turret punch press, in the processing of the first workpiece W, an external deceleration region O is set in the X and Y axes.
When the clamp devices 101A and 101B enter Z, the movement speed is reduced.

Further, a second top dead center area UZ is provided outside the dead zone DZ. That is, the clamp devices 101A and 101B are placed in the second top dead center region UZ.
When the mold enters, the dies are clamped by the clamp devices 101A and 101A.
This is an area where the punch is avoided at the position of the second top dead center above the normal first top dead center so as not to collide with 1B.

Before the clamp devices 101A and 101B enter the dead zone DZ, the punch must be surely raised to the position of the second top dead center. However, even if the moving speed of the clamp devices 101A and 101B is reduced. Even so, as shown in FIG. 8, a coasting distance is required until the speed becomes low, and the clamp devices 101A and 101B coast even during the elapsed time until the punch rises. The area set only wider than the dead zone DZ is the second top dead center area UZ.

An external deceleration region OZ is provided further outside the second top dead center region UZ. Since the second top dead center region UZ can be narrowed as the speed of the clamp devices 101A and 101B is lower, the external deceleration region OZ is set before the clamp devices 101A and 101B enter the second top dead center region UZ. , 101B in advance.

[0007]

However, in the conventional sheet material processing machine, the external deceleration region OZ takes into consideration the coasting distance until the X and Y axes reach the deceleration speed. It is set wider than the required area.
For this reason, even when deceleration is not required, deceleration is applied, so that there is a problem in that the machining time becomes longer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to reduce the time required for externally decelerating the moving speed of the clamp device in the X and Y-axis directions in the external deceleration region to reduce the processing efficiency. It is an object of the present invention to provide a method and an apparatus for adjusting a processing speed in a sheet material processing machine capable of improving the processing speed.

[0009]

According to a first aspect of the present invention, there is provided a method for adjusting a processing speed in a sheet material processing machine, comprising the steps of: moving a carriage base in a longitudinal direction; Is moved in the left-right direction with respect to the carriage base, so that the work clamped by the clamp device is positioned at the processing section of the plate material processing machine to perform the processing. At the time of machining, the clamp device does not enter the dead zone of the region corresponding to the front-rear and left-right directions of the machining portion, and the movement trajectory of the clamp device is decelerated within the external deceleration region provided outside the dead zone. In case of no change at normal time, the processing is performed without external deceleration processing when processing the second and subsequent workpieces. A.

Therefore, if the clamping device does not enter the dead zone in the processing of the first sheet and if the clamping apparatus does not move simultaneously in the front / rear and left / right directions in the external deceleration region, the processing in the second and subsequent sheets will not be performed. Even if the clamp device enters the external deceleration region, it does not reliably enter the dead zone, so that high-speed plate processing can be performed without external deceleration processing.

According to a second aspect of the present invention, there is provided a plate material processing machine with a processing speed adjusting device, wherein a carriage provided with a clamp device is movable in the left-right direction on a carriage base provided movably in the front-rear direction in the plate material processing machine. A processing section for positioning the clamped work on the clamping device and processing the plate material is provided; a dead zone in a region corresponding to the processing portion in the front-rear and left-right directions of the plate processing machine; and the clamping device outside the dead zone. An external deceleration region for reducing the moving speed of the clamp device; an external deceleration region detecting section for detecting that the clamp device has entered the external deceleration region; and a dead zone for detecting that the clamp device has entered the dead zone. A zone detector is provided to detect that the clamp device has moved simultaneously in the front, rear, left and right directions in the external deceleration area Provided with a front, rear, left and right simultaneous movement detection unit that,
When processing the first workpiece of the same processing program, the dead zone detection unit does not allow the clamp device to enter the dead zone, and the movement locus of the clamp device during deceleration and normal time within the external deceleration area Is not changed, there is provided a control device provided with a comparison / judgment device for giving a command not to perform the external deceleration process when machining the second and subsequent workpieces.

Therefore, the operation is the same as that of the first aspect, and the clamp device does not enter the dead zone in the first processing, and the clamp device does not move simultaneously in the front-rear and left-right directions in the external deceleration region. In this case, even if the clamp device enters the external deceleration region, the plate material is reliably processed without external deceleration processing in the processing of the second and subsequent sheets without external deceleration processing.

According to a third aspect of the present invention, there is provided a plate material processing machine according to the second aspect of the present invention, wherein the clamping device in the external deceleration region includes a front-rear direction and a left-right direction. Are provided with substantially the same deceleration rate.

Therefore, when the clamp device has the same deceleration ratio in the front-rear direction and the left-right direction in the external deceleration region, even if the clamp device is simultaneously moved in the front-rear direction in the external deceleration region in the processing of the first sheet, the speed is reduced. Since the movement trajectory of the clamp device does not change at all between the normal time and the normal time, if the clamp device does not enter the dead zone, the plate material is processed at high speed without external deceleration processing in the second and subsequent sheets.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a punch press according to the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, for example, a turret punch press 1 according to the present embodiment includes upper frames 9 on side frames 5 and 7 erected on both sides of a base 3.
Are configured in a frame structure in which both sides are supported. In the lower part of the upper frame 9, various types of punches P
The disk-shaped upper turret 11 is provided rotatably. On the upper surface of the base 3, a lower turret 13 facing the upper turret 11 is rotatably mounted. On the lower turret 13, a number of dies D facing various types of punches P are arranged in an arc shape. And it is detachably mounted. The upper turret 11
The axis of the lower turret 13 and the axis of the lower turret 13 are arranged on the same axis.
Are rotated synchronously in the same direction under the control of an appropriate control device such as a numerical control device.

A ram 15 (a pressure member) is mounted on the lower surface of the upper frame 9 at a substantially central portion so as to be vertically movable. The ram 15 is connected to, for example, a lower end of a piston rod 19 of a hydraulic cylinder 17 mounted on the upper frame 9. The punch P is indexed and positioned below the ram 15 by the rotation of the upper turret 11 and the lower turret 13, and the punch P thus positioned is pressed by the ram 15 operated by the vertical movement of the piston rod 19 of the hydraulic cylinder 17. Is what is done.

The turret punch press 1 is provided with a work W movement positioning device 21 for moving and positioning the work W in the front-rear and left-right directions, and the work W is gripped by its clamp devices 23A and 23B. . This moving positioning device 21 is controlled by a control device 25 as shown in FIG.
Is positioned at an appropriate position between the two.

Referring to FIGS. 1 and 2, the moving / positioning device 21 for the workpiece W is disposed on the front side of the turret punch press 1 (lower right side in FIG. 1). The movement positioning device 21 is mounted on a horizontally mounted center table 27 so as to be movable from the near side to a punching position K. The center table 27 is provided with a Y-axis servomotor 29 as a Y-axis feed mechanism and a Y-axis ball screw 31. Side table 33 is provided in a divided form. A carriage base 35 having a length substantially equal to the entire machine width of the turret punch press 1 is fixed to an outer edge of the side table 33. The Y-axis servomotor 29 is electrically connected to the control device 25 as shown in FIG.

The work W clamped by the clamp devices 23A and 23B is positioned in the Y-axis direction by the side table 33 and the carriage base 35 moving by the Y-axis feed mechanism.

Each of the side tables 33 has a sub-guide rail 37 provided on the side of the base 3 of the turret punch press 1 so that the lower surface of the side edge opposite to the center table extends in the Y-axis direction. Through a support bracket 39.

A guide rail (not shown) made of square steel for moving the carriage is provided below the side surface of the carriage base 35 facing the turret punch press 1, and the guide rail of the carriage base 35 is provided. A carriage 41 provided with clamping devices 23A and 23B is provided on the mounting side surface so as to be slidable in the X-axis direction along the guide rail.

An X-axis ball screw 43 provided on the side surface of the carriage base 35 substantially through the center of the carriage 41
Are arranged as shown in FIGS. 1 and 2, and are driven and rotated by an X-axis servo motor 45 as an X-axis feed mechanism. The rotation of the X-axis ball screw 43 allows the carriage 41 to freely move in the X-axis direction and position the work W in the X-axis direction in the length direction of the carriage base 35. Note that the X-axis servo motor 45 is electrically connected to the control device 25 as shown in FIG.

Therefore, after the plate-like work W is positioned between the punch P mounted on the upper turret 11 and the die D mounted on the lower turret 13, the punch P is pressed by the ram 15 The work W is punched by the punch P and the die D.

Next, an external speed reducer which is a main part of the present embodiment will be described with reference to the drawings.

Referring to FIG. 1, in the case of a hydraulic press, the punch P is usually at the rising end (first top dead center) slightly above the position where the work W is pressed in order to improve the hit rate. Punch P below ram 15 at punching position K
And the die device D in the X-axis and Y-axis directions corresponding to the die diameter, in other words, in the dead zone DZ.
When A and 23B move, the clamp device 23A or 23A
B collides with the mold.

Outside the dead zone DZ, a second top dead center area UZ is provided. That is, when the clamp devices 23A and 23B enter the second top dead center region UZ, the punch P is moved upward from the normal first top dead center so that the mold does not collide with the clamp devices 23A and 23B. This area is avoided at the position of the top dead center.

Before the clamp devices 23A and 23B enter the dead zone DZ, the punch P must be surely raised to the position of the second top dead center. Since the devices 23A and 23B coast, an area set wider than the dead zone DZ by the coast distance becomes the second top dead center area UZ.

Further, outside the second top dead center area UZ, an external deceleration area OZ is provided. Since the second top dead center region UZ can be narrowed as the speed of the clamp devices 23A and 23B is lower, the external deceleration region OZ is set before the clamp devices 23A and 23B enter the second top dead center region UZ. , 23B in advance.

The turret punch press 1 has a dead zone detector 47 for detecting the dead zone DZ.
3, a second top dead center region detection unit 49 for detecting the second top dead center region UZ, and an external deceleration region detection unit 51 for detecting the external deceleration region OZ are shown in FIG. Is electrically connected to the control device 25 as shown in FIG.

More specifically, on the carriage base 35, a part corresponding to the diameter of a die composed of the punch P and the die D below the ram 15 at the punching position K of the turret punch press 1 in the total length in the X-axis direction. A dead zone X-direction dog 53 constituting the dead zone detector 47 is provided at a position corresponding to the X-axis direction.

On both outer sides of the dead zone X-direction dog 53, a second top dead center region detecting section 49 is formed at a position corresponding to the boundary line of the second top dead center region UZ in the X axis direction. A point X direction dog 55 is provided.

Further, on both outer sides of the second top dead center X-direction dog 55, an external deceleration X-direction dog 57 constituting the external deceleration area detection unit 51 is provided at a position corresponding to the boundary of the external deceleration area OZ in the X-axis direction. Is provided.

In the clamp devices 23A and 23B, the dead zone X-direction dog 53, the second top dead center X-direction dog 55, and the external deceleration X-direction dog 57 are detected at both widths in the X-axis direction. X direction LS5 constituting the detection device
9 are provided. Note that this X direction LS59 is shown in FIG.
When the dead zone X direction dog 53 is detected as shown in FIG.
The control device 25 is configured to function as the second top dead center region detection unit 49 when the top dead center X direction dog 55 is detected, and to function as the external deceleration region detection unit 51 when the external deceleration X direction dog 57 is detected. It is electrically connected.

In FIG. 1, the lower support bracket 39 is provided with a Y-direction dog 61 at a position corresponding to the tip of the clamp devices 23A and 23B in the Y-axis direction.

Further, the table frame (not shown) of the turret punch press 1 is located on the movement trajectory line of the Y-direction dog 61, and the dead zone Y-direction LS 63 constituting the dead zone detector 47 is connected to the Y-direction dog 61. It is provided at a position corresponding to the Y-direction boundary of the dead zone DZ on the clamp device side in the Y-axis direction so as to be detected. The dead zone Y direction LS 63 is electrically connected to the control device 25 as the dead zone detecting section 47 as shown in FIG.

The second top dead center Y direction LS 65 constituting the second top dead center area detecting section 49 is located outside the clamp device side of the dead zone Y direction LS 63 (the right side in FIG. 1). Is provided at a position corresponding to the Y-direction boundary line of the second top dead center area UZ in the Y-axis direction. The second top dead center Y direction LS 65 is electrically connected to the control device 25 as shown in FIG. 3 as a second top dead center area detection unit 49 when the Y direction dog 61 is detected. I have.

Further, the second top dead center Y direction LS65
Y on the outside (right side in FIG. 1) of the clamp device side of
Positioned on the movement trajectory line of the direction dog 61, the Y direction dog 6
1 on the movement trajectory line, and the external deceleration area detection unit 51
Is provided at a position corresponding to the boundary of the external deceleration region OZ in the Y-axis direction so that the Y-direction dog 61 is detected. Note that this external deceleration Y
The direction LS67 is electrically connected to the control device 25 as shown in FIG. 3 as the external deceleration area detection unit 51 when the Y-direction dog 61 is detected.

Therefore, the carriage 41 and the clamp devices 23A and 23B are moved in the X-axis direction, and
When 59 comes into contact with the external deceleration X-direction dog 57 and is turned on, it is detected that the clamp devices 23A and 23B have entered the range of the external deceleration region OZ in the X-axis direction.

The carriage 41 and the clamping device 2
When the 3A and 23B are moved in the Y-axis direction and the Y-direction dog 61 comes into contact with the external deceleration Y-direction LS67 and is turned on, the clamp devices 23A and 23B have entered the Y-axis direction range of the external deceleration region OZ. Is detected.

In response to the ON signals in both the X direction LS59 and the external deceleration Y direction LS67 by the external deceleration X direction dog 57, the clamp devices 23A and 23B cause the external deceleration region O
The intrusion into Z is detected by the external deceleration area detection unit 51. The external deceleration area OZ can be obtained only by the ON signal on one side.
Is not considered to have entered.

Further, the clamp devices 23A and 23B are moved in the X-axis direction, and the X-direction LS59 is once disengaged from the external deceleration X-direction dog 57 and turned off, and then contacts the second top dead center X-direction dog 55 again. When it is turned ON, it is detected that the clamp devices 23A and 23B have entered the range in the X-axis direction of the second top dead center region UZ.

The carriage 41 and the clamping device 2
When the 3A and 23B are moved in the Y-axis direction and the Y-direction dog 61 is brought into contact with the second top dead center Y-direction LS65 and turned ON, the clamp devices 23A and 23B are moved in the Y-axis direction of the second top dead center region UZ. The second top dead center region detection unit 49 indicates that it has entered the range.
Is detected by

X by the second top dead center X direction dog 55
ON both the direction LS59 and the second top dead center Y direction LS65
The signal detects that the clamp devices 23A and 23B have entered the second top dead center region UZ. The ON signal on one side alone does not mean that the signal has entered the second top dead center area UZ.

Further, the clamp devices 23A and 23B are moved in the X-axis direction, and the X-direction LS59 is temporarily shifted to the second top dead center X
When it comes off from the direction dog 55 and turns off and then comes into contact with the dead zone X direction dog 53 and turns on again, it is detected that the clamp devices 23A and 23B have entered the dead zone DZ in the X-axis direction.

The carriage 41 and the clamping device 2
When the 3A and 23B are moved in the Y-axis direction and the Y-direction dog 61 comes into contact with the dead zone Y-direction LS63 and turns ON,
It is detected that the clamp devices 23A and 23B have entered the range of the dead zone DZ in the Y-axis direction.

The dead zone detector 47 detects that the clamp devices 23A and 23B have entered the dead zone DZ based on the ON signals in both the X direction LS 59 and the dead zone Y direction LS 63 by the dead zone X direction dog 53 described above. You. The ON signal on one side alone does not mean that the signal has entered the dead zone DZ.

Referring to FIG. 3, as the control device 25, an input device 71 such as a keyboard as input means for inputting various data to a CPU 69 as a central processing unit and various data are displayed. CR
A display device 73 such as T is connected.

In the CPU 69, data such as material, plate thickness, punching shape, and die information to be used are inputted from the input device 71 and stored as punching processing information, or the same processing program in one lot production processing. A memory 75 for storing the punching state of the first work W is connected.

The CPU 69 includes the clamp device 23.
An X- and Y-axis simultaneous movement detection unit 77 for detecting whether A and 23B have simultaneously moved in the X-axis and Y-axis directions;
An axis controller 79 for giving commands to the X-axis servomotor 45 and the Y-axis servomotor 29 to perform the external deceleration processing of A and 23B is connected.

The CPU 69 is connected to a press controller 81 for giving a command to a hydraulic control valve of the hydraulic cylinder 17 for performing punching.

Further, the CPU 69 determines whether or not the punching processing is the processing of the first work W of the same processing program, and in the state of the first punching processing, the clamp devices 23A and 23B move to the dead zone DZ. Whether or not the clamp device 23A, 2
It is determined whether 3B has moved simultaneously in the X-axis and Y-axis directions. If none of the conditions is satisfied, punching is performed at the normal processing speed without external deceleration for the second and subsequent workpieces W. A comparison / judgment device 83 for giving a command to the press control unit 81 is connected.

The above configuration will be described with reference to the flowcharts of FIGS.

According to the comparison / determination device 83, the one currently being machined is being machined starting with a completely new program, or the machine currently being machined has been machined for the same machining program before, It is determined whether or not the second and subsequent sheets are being processed continuously (step S1).

The determination as to whether or not the processing is the first processing is as follows.

The conditions for judging the start of the first sheet processing are as follows: (1)
When the power of the control device 25 is turned on, (2) the emergency stop state is set, and then released, (3) when the mode is set to a mode other than the memory mode, (4) when the program number is searched in the memory mode (this When we search for a completely new program, a completely different product).

The condition for judging the end of the first sheet processing is that the actual processing is performed in the memory mode judged to be the start of the first sheet processing, and a signal indicating the end of the program or the end of the tape of the program is output (however, Except when the power switch is turned off).

In the processing of the first sheet, the external deceleration area detecting section 51
Causes the clamping devices 23A and 23B to move to the external deceleration region OZ.
If the intrusion into the outside deceleration area OZ is detected, the processing is performed from the first top dead center without performing the second top dead center striking.
Then, a command is given to the axis controller 79 to perform an external deceleration process (steps S3 and S4).

Further, in the X / Y-axis simultaneous movement detecting section 77, it is detected whether or not the clamp devices 23A and 23B have simultaneously moved in the X-axis and Y-axis directions in the external deceleration region OZ. The detection result is stored in the memory 75 (step S5).

When the second top dead center region detecting section 49 does not detect that the clamp devices 23A and 23B have entered the second top dead center region UZ, the second top dead center is not hit and the first top dead center is not hit. Processing is performed from the dead center, and when intrusion into the second top dead center region UZ is detected, a command is given from the comparison determination device 83 to the press control unit 81, and the punch P is raised to the second top dead center. A so-called second top dead center punching process in which punching is performed from the second top dead center is performed (step S6).
And S7).

If the dead zone detecting section 47 does not detect that the clamp devices 23A and 23B have entered the dead zone DZ, the processing of the remaining program is continued, and if the entry into the dead zone DZ is detected. Press control unit 81 and axis control unit 7 from comparison judgment device 83
9 is given a command to stop the operation of the turret punch press 1 (step S8).

The above-described first punching state is stored in the memory 75.

In step S1, the comparison and judgment device 83
When it is determined that the processing is the processing of the second and subsequent sheets, the processing is ended in the case of the program end. If it is not the program end, the external deceleration area detection unit 51 detects whether the clamp devices 23A and 23B have entered the external deceleration area OZ. When the intrusion into the external deceleration area OZ is not detected, the external deceleration processing is not performed (steps S9, S10, S12).

When the intrusion into the external deceleration area OZ is detected, the result detected in step S8 at the time of processing the first sheet, that is, the X-axis and the Y-axis in the external deceleration area OZ are detected by the clamp devices 23A and 23B. The determination is made based on the detection result of whether or not they have simultaneously moved in the directions. If not, the external deceleration processing is not performed for the second and subsequent sheets.

For example, when the first sheet is processed, the clamping device 23 is used.
When only the X axis moves in the external deceleration area OZ as indicated by the dotted lines A and 23B in FIG. 6, the external deceleration processing is not performed for the second and subsequent sheets (steps S11 and S12).

If this is the case in step S11, a command is given from the comparison / determination device 83 to the axis control section 79 to perform an external deceleration process (steps S11 and S13).

The reason is that, when the clamp devices 23A and 23B are simultaneously moved in the X-axis and Y-axis directions in the external deceleration region OZ in the processing of the first sheet, the deceleration ratio between the X-axis and the Y-axis is reduced. Is different, the locus of the clamp devices 23A and 23B may change depending on the presence or absence of external deceleration.

For example, while the normal X-axis speed is 60 m / min and the Y-axis speed is 50 m / min, the X-axis deceleration ratio is 60 m / min.
%, The speed after deceleration is 36m / min, and the Y-axis deceleration ratio is 50
% And the deceleration speed is 25 m / min, when the external deceleration is performed in the external deceleration region OZ in the processing of the first sheet, the normal deceleration outside the external deceleration region OZ as shown by a solid line in FIG. It is not a trajectory on the extension of the speed at the time.

Since the trajectory in the external deceleration area OZ is a trajectory avoiding the dead zone DZ, when the external deceleration is not performed in the external deceleration area OZ in the processing of the second sheet, the normal speed of the X axis is used. Is 60 m / min and the Y-axis speed moves at 50 m / min, so the dead zone DZ on the extension of the normal speed outside the external deceleration zone OZ as shown by the two-dot chain line in FIG. Follow the trajectory of invading.

Then, even if the punch P is raised in the second top dead center region UZ before entering the dead zone DZ, the speed of the clamp device 23 is not reduced, so that the punch P is moved upward by the coasting distance. Clamping device 23 before ascending to dead center
May collide with the punch P.

However, when the clamp devices 23A and 23B have the same X-axis: Y-axis ratio of the deceleration speed in the external deceleration region OZ, the clamping devices 23A and 23B
Even if 23B moves simultaneously in the X and Y axis directions in the external deceleration area OZ, the clamping device
Since the movement trajectories of A and 23B do not change at all, if the clamp devices 23A and 23B do not enter the dead zone DZ, even if the clamp devices 23A and 23B are processed on the second and subsequent sheets.
Even if A and 23B enter the external deceleration region OZ, punching can be performed at high speed without external deceleration processing.

The second top dead center area detection section 49 detects whether or not the clamp devices 23A and 23B have entered the second top dead center area UZ. If the intrusion into the second top dead center region UZ is not detected, the second top dead center hitting process is not performed (steps S14 and S16).

If intrusion into the second top dead center area UZ is detected, the result detected in step S8 during processing of the first sheet, that is, whether the clamp devices 23A and 23B have entered the dead zone DZ. Is determined based on the detection result. If not, the second top dead center striking process is not performed (steps S15 and S16).

If this is the case in step S15, a command is given from the comparison and judgment device 83 to the axis control section 79, and the second
The top dead center hitting process is performed, and the processing is completed (step S
17).

As described above, the clamp devices 23A and 23B do not enter the dead zone DZ in the first processing, and the clamp devices 23A and 23B are simultaneously moved in the X and Y axis directions in the external deceleration region OZ. If there is no change, in other words, if there is no change in the movement trajectory between the clamp devices 23A and 23B during deceleration and during normal operation, there is no need to perform an external deceleration process. , 23B enter the external deceleration region OZ, punching can be performed at high speed without external deceleration processing.

The present invention is not limited to the above-described embodiments of the present invention, but can be embodied in other forms by making appropriate changes. In the present embodiment, a turret punch press has been described as an example of a plate processing machine, but a plate processing machine such as a one-station punch press may be used.

[0077]

As will be understood from the above description of the embodiment of the invention, according to the first aspect of the present invention, the clamping device does not enter the dead zone in the first processing and the clamping device Is not moving simultaneously in the front / rear and left / right directions in the external deceleration area, there is no external deceleration processing in the processing of the second and subsequent sheets even if the clamp device enters the external deceleration area because it does not reliably enter the dead zone. And can process at high speed, and can efficiently process plate materials.

According to the second aspect of the present invention, in the same manner as the first aspect, the clamping device does not enter the dead zone in the processing of the first sheet, and the clamping device is moved in the front-rear and left-right directions in the external deceleration region. If you are not moving to
Even if the clamp device intrudes into the external deceleration area, it can be processed at high speed without external deceleration processing even if the clamp device enters the external deceleration area.
Plate material processing can be performed efficiently.

According to the third aspect of the present invention, since the deceleration ratios in the front-rear direction and the left-right direction are the same in the external deceleration area in the external deceleration area, the clamp apparatus is moved in the external deceleration area in the external deceleration area. Even if they move in the same direction at the same time, the movement trajectory of the clamp device does not change at all during deceleration and during normal operation. Plate processing can be performed at high speed without deceleration processing.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a plan view of a turret punch press.

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

FIG. 3 is a configuration block diagram of a control device.

FIG. 4 is a flow chart showing an embodiment of the present invention.

FIG. 5 is a flowchart showing the embodiment of the present invention and is a continuation of FIG. 4;

FIG. 6 shows an embodiment of the present invention, and is an explanatory view of the operation of the clamp device in each region.

FIG. 7 shows a conventional example, and is an explanatory view of the operation of the clamp device in each area.

FIG. 8 shows a conventional example, and is an explanatory diagram of an axial speed and a coasting distance of a clamp device.

[Explanation of symbols]

 Reference Signs List 1 turret punch press 11 upper turret 13 lower turret 15 ram (pressing member) 21 moving positioning device 23 clamping device 25 control device 29 Y-axis servo motor (Y-axis feed mechanism) 35 carriage base 41 carriage 45 X-axis servo motor ( X-axis feed mechanism) 47 Dead zone detection unit 49 Second top dead center region detection unit 51 External deceleration region detection unit 69 CPU (central processing unit) 75 Memory 77 X and Y-axis simultaneous movement detection unit 79 Axis control unit 81 Press control Part 83 Comparison judgment device

Claims (3)

[Claims] 1. A work clamped to a clamp device of a sheet material processing machine by moving a carriage base in a front-rear direction and moving a carriage provided with the clamp device in a left-right direction with respect to the carriage base. When performing machining by positioning in the machining section, when machining the first work piece of the same machining program, the clamp device does not enter the dead zone of the area corresponding to the front, rear, left and right directions of the machining section, and If the movement trajectory of the clamp device does not change between the time of deceleration and the normal time in the external deceleration area provided outside the dead zone, the processing is performed without performing the external deceleration processing when processing the second and subsequent workpieces. A method for adjusting a processing speed in a sheet material processing machine, wherein the method is performed. 2. A carriage having a clamp device is movably provided in a left and right direction on a carriage base movably provided in a longitudinal direction in a plate material processing machine, and a workpiece clamped by the clamp device is positioned to perform plate material processing. A dead zone in an area corresponding to the processing section in the front-rear and left-right directions of the sheet material processing machine; and an external deceleration area outside the dead zone for reducing the moving speed of the clamp device. An external deceleration region detection unit that detects that the clamp device has entered the area; a dead zone detection unit that detects that the clamp device has entered the dead zone; and the clamp device within the external deceleration region. Is provided with a front / rear / left / right simultaneous movement detection unit that detects that the When the dead zone detector detects that the clamp device does not enter the dead zone and the moving trajectory of the clamp device does not change between the time of deceleration and the time of normal in the external deceleration area during the processing of the workpiece, A processing speed adjusting device for a sheet material processing machine, comprising: a control device including a comparison / determination device for giving a command not to perform an external deceleration process when processing the second and subsequent workpieces. 3. The processing speed adjusting device according to claim 2, wherein the clamping device in the external deceleration region is provided with substantially the same deceleration rate in the front-rear direction and the left-right direction.