JP2000343161A - Clamp avoiding method and its device in plate processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an efficient processing by changing an avoiding angle of an avoiding clamp to a small setting angle, when openings between a plurality of avoiding clamps are smaller than a preset distance, and by turning the avoiding clamp being intruded into an interfering area with a working part to a preset avoiding angle or a normal avoiding angle according to a size of the work. SOLUTION: A carriage 43 is equipped with three avoiding clamps 25A, 25B and 25C wherein clampers 23 are constituted in a way to turn for avoiding from interfering areas between each processing part. The plural avoiding clamps get close to a work Wa being small and, alienate from a work Wc being large along the carriage 43. A piston position detector is installed to clamper turning cylinders 55 and, the cylinders 55 are made to be stopped when a piston position is detected. Avoiding angles of the avoiding clamps are automatically changed according to a work size by a detected signal of clamp opening distances. A mistake of an operator is thus eliminated and yielding and productivity are improved.

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 avoiding a clamp in a plate processing machine such as a punch press, a laser processing machine, and a plasma processing machine.

[0002]

2. Description of the Related Art Conventionally, for example, a combined punch / laser machine having a punching section and a laser processing section as a sheet material processing machine is provided with a clamp device for clamping a work, and the clamped work is punched by a punching section or laser. A work movement positioning device that moves and positions the processing unit in the front-rear and left-right directions is provided.

When the above-mentioned clamp device enters a region of each processing position of the punching processing portion or the laser processing portion, in other words, enters a dead zone, it collides with a die of the punching processing portion or a laser processing head of the laser processing portion.

Therefore, in a punch / laser combined machine,
As shown in FIG. 8, a swing type avoiding clamp 103 in which the clamping device 101 itself swings to an avoiding angle of 60 ° to avoid it is shown in FIG.
5, three or more of them are provided so that when one of the avoidance clamps 103 enters each of the processing parts, it is turned at an avoidance angle of 60 ° and can be avoided from an interference area with each of the processing parts. I have.

As shown in FIG. 8, the avoiding clamp 103 is pivotable about a pivot shaft 107 and is supported by the tip of a piston rod 111 of a hydraulic cylinder 109 which operates in the left-right direction in FIG. ing. Therefore, the piston 113 of the hydraulic cylinder 109
Is moved clockwise from the solid line to the position indicated by the two-dot chain line at an avoidance angle of 60 °, and the hydraulic cylinder 1
When the piston 113 of 09 moves leftward, it is turned counterclockwise from the two-dot chain line to the position of the solid line.

When a plate material is processed on the work W clamped by the plurality of avoidance clamps 103, the work W is clamped by at least two of the three or more avoidance clamps 103. In this state, the single avoidance clamp 103 that enters the interference area with each of the processing portions immediately unclamps the work W and turns to avoid the interference area.

For example, as shown in FIG. 8, when the avoidance clamp 103 is turned at an avoidance angle of 60 °, the avoidance distance in the front-rear direction (Y direction) of the avoidance clamp 103 is, for example, 67 mm. Is the mold diameter 3-1 / 2
This indicates that a die having an inch (133 mm in the X direction and 133 mm in the Y direction as the interference area) can be punched until the dead zone in the Y direction becomes zero (Y = 0).

[0008]

However, in the conventional avoidance clamp 103, since the avoidance angle of the avoidance clamp 103 is fixedly set to 60 °, two adjacent clamps are used.
In order to prevent the two avoidance clamps 103 from performing the avoidance operation at the same time, the distance between the centers of two adjacent avoidance clamps 103 is, for example, a minimum of 420 mm as shown in FIG. Therefore, when the work W clamped using the three avoidance clamps 103 is subjected to punching processing and laser processing, the minimum work size (X direction) of the work W in the X direction as shown in FIG. For example, there is a problem that the size becomes as large as 900 mm.

As a result, the work size in the X direction is 900
mm or less, for example, horizontal and vertical size of 500 mm
The sketch material of × 500 mm needs to be processed in the same manner as the conventional dead zone (in this case, Y = 100 mm) with the avoidance function of the avoidance clamp 103 turned off, so that the yield of the workpiece W is reduced. There was a problem.

Further, as described above, the avoidance function is set to ON-OF
Since switching to F is performed by the operator after judgment, there have been problems such as inadvertent mistakes and reduced productivity.

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 automatically perform an avoidance function by clamping a small work such as a sketch material, thereby enabling more efficient product processing. An object of the present invention is to provide a method and an apparatus for avoiding a clamp in a sheet material processing machine.

[0012]

According to the first aspect of the present invention, there is provided a method for avoiding a clamp in a sheet material processing machine according to the present invention, in which a carriage base is moved in a front-rear direction and a workpiece can be clamped and unclamped. By moving a carriage provided with at least three or more avoidance clamps that can be rotated substantially in a horizontal plane in the left-right direction with respect to the carriage base, the work clamped by the plurality of avoidance clamps can be moved to a processing unit of a sheet material processing machine. When performing machining by positioning, the plurality of avoidance clamps are moved toward or away from each other in the carriage according to the size of the work, and when the distance between the plurality of avoidance clamps is equal to or less than a preset set clamp distance, Switching the avoidance angle of the avoidance clamp to a preset avoidance angle smaller than usual More, it is characterized in that the allowed to pivot around a clamp that has entered the interfering area of the processing unit to the setting circumvent angle or normal avoidance angle according to the size of the workpiece.

Therefore, by automatically switching the avoidance angle of the avoidance clamp according to the size of the work,
For a work of small size such as a sketch material, even if there is some dead zone, plate work such as punching or laser processing is performed by automatically avoiding avoiding clamping.

Since the distance between adjacent avoidance clamps is automatically detected, the avoidance angle of the avoidance clamp is automatically and surely switched according to the size of the work by this detection signal.

Further, since the avoidance angle of the avoidance clamp is switched according to the size of the work, the situation where the two avoidance clamps simultaneously perform the avoidance operation is avoided.

As described above, inadvertent mistakes by the operator are eliminated, work yield is improved, and productivity is improved.

According to a second aspect of the present invention, there is provided a clamp avoiding device for a sheet material processing machine, wherein a avoidable clamp capable of clamping and unclamping a work and swinging substantially in a horizontal plane is provided on a carriage base provided to be movable and positioned in the front-rear direction. A carriage having at least three or more is provided so as to be movable and positionable in the left-right direction, and a clamp turning device is provided for turning each of the plurality of avoidance clamps to an arbitrary avoidance angle, and the plurality of avoidance clamps approach each other in the carriage. A clamp-to-clamp distance detection device is provided to be able to be separated from each other and detects a distance between the plurality of avoidance clamps. A distance between the plurality of avoidance clamps detected by the clamp-to-clamp distance detection device is equal to or less than a preset set clamp distance. In advance, set the avoidance angle of each avoidance clamp to a smaller value than usual. By switching to the set setting avoidance angle, a command is given to the clamp turning device to turn the avoidance clamp, which has entered the processing portion of the plate material processing machine, to the set avoidance angle or the normal avoidance angle according to the size of the workpiece. A control device provided with a judgment device is provided.

Therefore, the operation is the same as that of the first aspect, and by automatically switching the avoidance angle of the avoidance clamp according to the size of the work, the dead zone is provided for a work of a small size such as a sketch material. Even if there is a small amount, plate clamp processing such as punching processing and laser processing is automatically performed by avoiding the avoidance clamp.

Since the inter-clamp distance between the avoidance clamps adjacent to each other is automatically detected, the avoidance angle of the avoidance clamp can be automatically and reliably switched according to the size of the work by this detection signal.

Further, since the avoidance angle of the avoidance clamp is switched according to the size of the work, a situation in which the two avoidance clamps simultaneously perform the avoidance operation is avoided.

As described above, inadvertent mistakes by the operator are eliminated, the yield of the work is improved, and the productivity is improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a clamp avoiding device according to the present invention will be described below with reference to the drawings, taking a punch / laser combined machine as an example of a plate material machine.

Referring to FIG. 6 and FIG. 7, in the punch / laser combined machine 1 according to the present embodiment, both sides of the upper frame 9 are supported by side frames 5 and 7 erected on both sides of the base 3. A work area formed between the upper frame 9 and the lower frame, comprising a punching section for performing punching on the work W and a laser processing section for performing laser processing on the work W between the upper frame 9 and the lower frame. Is provided.

As the punching portion, a disk-shaped upper turret 13 having various types of punches P detachably mounted on the lower portion of the upper frame 9 is rotatably mounted.

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 arc-shaped. 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 rotated synchronously in the same direction.

A ram 17 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 17 by the rotation of the upper turret 13 and the lower turret 15 is moved up and down via a connecting rod by the rotation of a crankshaft 19 which is horizontally supported on the upper frame 9, for example. The plate-shaped workpiece W, which is pressed by the moved ram 17 and moved and positioned at the processing position, is punched by the cooperation of the punch P and the die D. The processing position of the punching part is shown in FIG. It is represented by C.

In the punch / laser combined machine 1, the upper and lower turrets 13 and
A laser processing head is provided on the right side of the 15 processing positions, and a laser beam is emitted toward the workpiece W from a nozzle at the tip of the laser processing head.

More specifically, the combined punch / laser machine 1 has a built-in laser oscillator (not shown) for oscillating a laser beam, and the laser beam oscillated by this laser oscillator passes through an intensity adjusting device (not shown). At the laser processing head, the light is reflected vertically downward through a bend mirror (not shown). This laser beam is focused by a focusing lens (not shown) provided inside the laser processing head. Laser processing such as cutting the laser beam into a desired shape is performed on the workpiece W transferred and positioned with respect to the irradiation optical axis of the focused laser beam. The processing position of the laser processing part is shown in FIG. It is represented by C.

The punch / laser combined machine 1 is provided with a work movement positioning device 21 for moving and positioning the work W in the front, rear, left and right directions, and the work movement positioning device 21 holds the work W. Clamper 2
A plurality of avoidance clamps 25 are provided so as to be turned around from a so-called dead zone DZ such as a punching die area or a laser processing head nozzle area. The work movement positioning device 21 is controlled by a control device (not shown) to position the work W at an appropriate position between the punch P and the die D.

The work movement positioning device 21 is disposed on the lower right side of the combined punch / laser machine 1 in FIG. The work movement positioning device 21 is provided with a carriage base 27 having a length substantially equal to the entire machine width of the combined punch / laser machine 1 movably in a Y direction on a carriage base linear guide 31 provided on a table frame 29. The carriage base 27 is provided movably in the Y direction by a Y-axis feed mechanism including a Y-axis feed ball screw 33 and a Y-axis motor 35. Note that the Y-axis motor 35 is electrically connected to the control device.

The carriage base 27 is located on a horizontally mounted center table 37 from the right in FIG. The carriage table 27 can be moved to C, and a side table 39 is fixed to the lower part of the carriage base 27 so as to be divided right and left of the center table 37, and moves in the front-rear direction (Y direction) with the movement of the carriage base 27. It is free.

The carriage base 27 is provided with a carriage linear guide 41 as shown in FIG. 6 on the side surface facing the combined punch / laser machine 1, and is provided on the side surface of the carriage base 27. A carriage 43 having the clamp 25 is slidably provided in the left-right direction (X direction) along the carriage linear guide 41.

A ball screw 45 for the carriage provided on the side surface of the carriage base 27 substantially through the center of the carriage 43 is arranged as shown in FIG. Is driven and rotated. The rotation and rotation of the carriage ball screw 45 allow the carriage 43 to position and feed the workpiece W in the length direction of the carriage base 27 in the X-axis direction. Note that the X-axis motor 49 is electrically connected to the control device.

As described above, the plate-shaped work W is
Between the punch P mounted on the laser combined machine 1 and the die D mounted on the lower turret 15, that is, the punch center P. After being positioned at C, the work W is subjected to punching. Further, the work W is a laser center L. The laser processing is performed while being positioned at C.

Next, a clamp avoiding device in the combined punch / laser machine 1 according to the main part of the embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 2, in a conventional clamping device, when a punching section or a laser processing section enters an area of each processing position, in other words, enters an interference area with each processing section, a die or a laser processing section of the punching section. Collides with the laser processing head. However, the clamp avoidance device of the present embodiment includes three avoidance clamps 25A, 25B, and 25C that are configured so that the clamper 23 itself pivots and avoids the interference area with each processing portion as described above. As shown in FIG. 2, it is provided in the carriage 43. When any of the three avoidance clamps 25 enters the interference area, the clamper 23 of the entered avoidance clamp 25 turns so as to be able to avoid the interference area.

It should be noted that the number of the avoidance clamps 25 is not limited to three, and it is preferable that there are at least three or more. Further, the plurality of avoidance clamps 25 are provided so as to be able to approach and separate from each other along the carriage 43, and as shown in FIG.
In the case of a, the workpieces Wc are positioned close to each other, and in the case of a large-sized workpiece Wc, the workpieces Wc are separated from each other.

More specifically, as shown in FIG.
1, and is supported on the tip of a piston rod 57 of a clamper turning cylinder 55, for example, as a clamp turning device for turning the clamper 23 by operating in the left-right direction in FIG. I have.

The clamper turning cylinder 55 is provided with, for example, a cylinder auto switch 61 as a piston position detecting device for detecting the position of the piston 59, and the cylinder auto switch 61 is electrically connected to a control device. . When the position of the piston 59 is detected by the cylinder auto switch 61, the clamper turning cylinder 55 is controlled to be stopped. Therefore, by adjusting the position of the cylinder auto switch 61, the avoidance angle θ of the clamper 23 can be easily and arbitrarily changed.

In this embodiment, as shown in FIG. 1, the preset avoidance angle of the clamper 23 is 30 °.
The position of the cylinder auto switch 61 is adjusted by the dimension A so that Therefore, when the piston 59 of the clamper turning cylinder 55 moves rightward in FIG. 1, the piston 59 is turned clockwise from the solid line to the position indicated by the two-dot chain line at a setting avoidance angle of 30 °, and the piston 59 is moved leftward in FIG. When it moves in the direction, it is turned counterclockwise from the two-dot chain line to the position of the solid line.

It should be noted that the avoidance clamp 25 is configured so that the piston 59 of the clamper turning cylinder 55 moves up to the maximum stroke, so that the clamper 23 is adjusted by adjusting the A dimension.
Is configured to be able to turn up to an avoidance angle θ of 60 °.

Referring to FIG. 3, the avoidance clamp 25 is turned when the avoidance angle θ is 30 °.
Since the avoidance distance in the Y direction is, for example, approximately 37 mm,
For a mold having a mold diameter of 3-1 / 2 inch (the interference area is 133 mm in the X direction and 133 mm in the Y direction), Y
The dead zone in the direction is, for example, 30 mm (Y = 3
It can be punched until it reaches 0). However, the avoidance angle θ
Is 30 °, two avoidance clamps 2 adjacent to each other
Since the distance B between two adjacent avoidance clamps 25 to prevent the simultaneous avoidance operation of the work 5 is 220 mm at a minimum, the work is performed because three avoidance clamps 25 are used. The minimum work size of the W in the X direction is, for example, 500 mm.

Since the diameter of the tip of the nozzle of the laser processing head is smaller than the diameter of the laser processing portion, it is possible to avoid the laser processing head beyond the diameter. Therefore, even if the avoidance angle θ of the avoidance clamp 25 is 30 ° as described above. Laser processing is possible until the dead zone in the Y direction becomes zero (Y = 0).

By the way, when the avoidance angle θ is 60 °,
As described above, since the avoidance distance of the avoidance clamp 25 in the Y direction is, for example, 67 mm, the dead zone in the Y direction is zero (Y = 0) for a mold having a mold diameter of 3１ ／ inch. Can be punched until
Is, for example, 900 mm.

Referring to FIG. 2, for example, a linear detection sensor 63 as a clamp distance detecting device is provided on the left side surface of the clamp body 51 of the avoidance clamps 25B and 25C in FIG. The linear detection sensor 63 monitors the inter-clamp distance B between adjacent avoidance clamps 25 on the left side, and is configured to generate a detection signal by detecting that the distance becomes less than a preset inter-clamp distance. Have been. In the present embodiment, a detection signal is output when the above-mentioned set inter-clamp distance B becomes, for example, 410 mm or less, and the linear detection sensor 63 is electrically connected to the control device.

As the control device 65, an input device 69 and a display device 71 for inputting data such as various processing conditions such as a material, a shape and a size of the work W to the CPU 67 as a central processing device are input. Data and avoidance clamp 25
Is electrically connected to a memory 73 that stores a preset avoidance angle θ.

Further, the CPU 67 has a distance B between the clamps of the three avoidance clamps 25A, 25B and 25C.
The detection signal of the linear detection sensor 63 that has detected that the approach
The avoidance angle θ of 5 is set to 3 as a preset avoidance angle.
A command is given to the cylinder auto switch 61 to switch to 0 °, and when the avoidance clamp 25 enters the interference area with each processing portion, the above-mentioned set avoidance angle of 30 is set.
Is electrically connected to a comparison / judgment device 75 that gives a command to turn the cylinder to a degree.

Conversely, when the distance B between the clamps of the avoidance clamp 25 is greater than the set clamp distance B of 410 mm, no detection signal is generated from the linear detection sensor 63. 3
A command is given to the cylinder auto switch 61 to switch from 0 ° to the normal avoidance angle θ of 60 °.

With the above configuration, referring to FIG. 5, when the operation of the combined punch / laser machine 1 is started, the avoidance function of the three avoidance clamps 25A, 25B, 25C is turned on.
(Steps S1 and S2).

When the length of the work Wc in the X direction is 900 mm or more (X ≧ 900), the adjacent avoidance clamp 2
5 is larger than the set distance of 410 mm, and the linear detection sensor 63 is OFF, so that the cylinder switch cannot be switched ON so that the avoidance angle θ is 60 ° (steps S3 to S3). S
5).

Therefore, the avoidance distance of the avoidance clamp 25 in the Y direction is, for example, 67 mm, so that the die diameter 3-1 /
The dead zone is zero (Y =
It is possible to perform punching until the value reaches 0) (step S6).

When punching and laser processing are performed on the work Wc having a length of 900 mm or more in the X direction clamped by the three avoidance clamps 25, 1
When the avoidance clamps 25 intrude into the interference area with each processing part, the invasion avoidance clamp 25 immediately unclamps the work Wc and turns 60 °, so that it is avoided from the interference area of each processing part. At this time, since the state is clamped by at least two of the three avoidance clamps 25A, 25B, and 25C, the avoidance operation is reliably performed, and the punching and laser processing is completed (step S7).

When the length of the workpiece Wa in the X direction is smaller than 900 mm (X <900), the distance B between the adjacent avoidance clamps 25 is smaller than 410 mm, and the linear detection sensor 63 is turned on. The cylinder switch is turned on to switch to the setting avoidance angle of 30 ° (steps S8 to S10).

Therefore, since the setting avoidance angle is 30 °, the minimum sketch material that can be clamped has a length in the X direction of 500 mm. In addition, since the avoidance distance of the avoidance clamp 25 in the Y direction is approximately 37 mm, the mold diameter is 3-1 / 2.
For an inch die, punching can be performed until the dead zone in the Y direction becomes, for example, 30 mm (Y = 30). (Step S11).

A work Wa such as a sketch material whose length in the X direction is smaller than 900 mm and larger than 500 mm is clamped by the three avoidance clamps 25A, 25B and 25C, and punching and laser processing are performed. If one avoidance clamp 25 intrudes into the interference area with each processing part during this processing, this invading clamp 25 immediately unclamps the work Wa and turns 30 °, so that the interference area of each processing part Avoided from. At this time, since the clamp is clamped by at least two of the three avoidance clamps 25A, 25B, and 25C, the avoidance operation is reliably performed, and the punch and laser processing is completed (step S12).

As described above, since the avoidance angle of the avoidance clamp 25 is automatically switched according to the size of the work W, the avoidance function of the avoidance clamp 25 could not be used automatically in the past. For a work Wa of such a small size, even if the dead zone in the Y direction is only a small distance of about 30 mm in the punching, the avoidance clamp 25 is automatically avoided to perform plate processing such as punching or laser processing. It became possible to do.

Further, since the distance between the clamps of the avoidance clamps 25 adjacent to each other is automatically detected, the avoidance angle θ of the avoidance clamp 25 is automatically determined according to the size of a large work Wc or a small work Wa such as a sketch material. Can be reliably switched to the set avoidance angle or the normal avoidance angle. Inadvertent mistakes by the operator are eliminated, the yield of the work W is improved, and productivity is improved. Further, since the distance between the clamps is automatically detected, it is possible to prevent a situation where the two avoidance clamps 25 simultaneously perform the avoidance operation.

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. In this embodiment, a punch / laser combined machine has been described as an example of a plate material machine, but a punch press machine, a laser machine, and other plate material machines may be used.

[0059]

As will be understood from the above description of the embodiments of the invention, according to the first aspect of the invention, the avoidance angle of the avoidance clamp can be automatically switched according to the size of the work. Therefore, even if there is some dead zone for small-sized workpieces such as sketch materials, it is possible to avoid avoiding clamps automatically without performing manual switching as in the past, and to perform punching and laser processing. Plate material processing can be performed.

Further, since the distance between adjacent avoidance clamps can be automatically detected, it is possible to automatically and reliably switch the avoidance angle of the avoidance clamp according to the size of the work by this detection signal.

Further, since the avoidance angle of the avoidance clamp is switched according to the size of the work, it is possible to avoid a situation where the two avoidance clamps simultaneously perform the avoidance operation.

Therefore, it is possible to eliminate inadvertent mistakes by the operator and to improve the yield of the work.
Productivity can be improved.

According to the second aspect of the present invention, the effect is the same as that of the first aspect, and the avoidance angle of the avoidance clamp can be automatically switched according to the size of the work.
Even if there is some dead zone for small-sized workpieces such as sketch materials, plate work such as punching and laser processing can be performed automatically without avoiding the need for manual switching as in the past. It can be performed.

Further, since the distance between the adjacent clamps can be automatically detected, it is possible to automatically and surely switch the avoidance angle of the avoidance clamp according to the size of the workpiece by this detection signal.

Since the avoidance angle of the avoidance clamp is switched in accordance with the size of the work, it is possible to avoid a situation in which the two avoidance clamps simultaneously perform the avoidance operation.

Therefore, inadvertent mistakes of the operator can be eliminated, and the yield of the work can be improved.
Productivity can be improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a plan view of an avoidance clamp.

FIG. 2 shows the embodiment of the present invention, and is a plan view illustrating a relationship between three avoidance clamps.

FIG. 3, showing an embodiment of the present invention, is a plan view illustrating a relationship between three avoidance clamps when clamping a sketch material.

FIG. 4 shows an embodiment of the present invention, and is a block diagram of a control device.

FIG. 5 is a flow chart showing an embodiment of the present invention and showing a switching state of an avoidance angle of an avoidance clamp according to a size of a work.

FIG. 6 is a side view of the combined punch / laser machine used in the embodiment of the present invention.

FIG. 7 is a plan view of a combined punch / laser machine used in the embodiment of the present invention.

FIG. 8 is a plan view of a conventional avoidance clamp.

FIG. 9 is a plan view showing the relationship between adjacent avoidance clamps in the conventional example.

FIG. 10 is a plan view showing the relationship between three avoidance clamps in the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Punch laser combined machine 13 Upper turret 15 Lower turret 21 Work movement positioning device 23 Clamp 25 Avoidance clamp 27 Carry base 43 Carry 55 Clamp rotation cylinder (clamp rotation device) 59 Piston 61 Cylinder auto switch (Piston position detection device) 63) Linear detection sensor (clamp distance detection device)

Claims (2)

[Claims] 1. A carriage provided with at least three or more avoidable clamps for moving a carriage base in the front-rear direction and capable of clamping and unclamping a work and capable of pivoting in a substantially horizontal plane with respect to the carriage base in a lateral direction. By moving the work clamped by the plurality of avoidance clamps to the processing section of the plate material processing machine and performing the processing, the plurality of avoidance clamps approach or approach each other in the carriage according to the size of the work. By separating the plurality of avoidance clamps, the avoidance angle of each avoidance clamp is switched to a preset avoidance angle to a smaller value than usual when the interval between the avoidance clamps is equal to or less than a preset set clamp distance,
A method of avoiding a clamp in a sheet material processing machine, comprising: turning an avoidance clamp that has entered an interference area with the processing portion to the set avoidance angle or a normal avoidance angle according to the size of a workpiece. 2. A carriage provided with at least three or more avoidable clamps capable of clamping and unclamping a work and being rotatable in a substantially horizontal plane on a carriage base provided so as to be movable and positionable in the front-rear direction. A plurality of avoidance clamps are provided so as to freely rotate, and each of the plurality of avoidance clamps is pivoted to an arbitrary avoidance angle; and the plurality of avoidance clamps are provided so as to be able to approach and separate from each other in the carriage, and a distance between the plurality of avoidance clamps is provided. A distance between the plurality of avoidance clamps detected by the distance between clamps detected by the distance between clamps is less than a preset set distance between clamps. By switching to the preset avoidance angle set in advance,
A control provided with a comparison / judgment device for giving a command to the clamp turning device to turn the avoidance clamp that has entered the interference area with the processing portion of the plate material processing machine to the set avoidance angle or the normal avoidance angle according to the size of the workpiece. A clamp avoiding device in a plate material processing machine, comprising a device.