JP2003103326A - Positioning device for plate material of plate material working machine and positioning method for plate material using the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the loss time in clamp-changing of a work. SOLUTION: A carriage base 29 capable of positioning movably in the Y- direction is provided, an X-axis guide rail 41 extending in the X-direction is provided on the carriage base 29, and a stator of a linear motor is provided on the X-axis guide rail 4 so as to extend in the X-axis direction. At least three or more of work clamp devices 33 provided with a moving piece capable of traveling along the X-axis guide rail 41 in the X-direction and opposing to the stator are provided especially independently so as to be capable of positioning movably. During the working of the work by clamping the work by the work clamp device 33, under the condition of clamping the work by the two or more work clamp devices 33, the other clamp devices 33 are made to reverse-travel or following-travel to carry out the clamp-changing of the work for avoiding a dead zone, etc., without interruption of the working of the work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material positioning device for a plate material processing machine and a plate material positioning method using the device.

[0002]

2. Description of the Related Art Conventionally, a plate material processing machine such as a punch press or a laser processing machine is provided with a plate material positioning device for positioning a work with respect to a processing portion, and the plate material positioning device is movable and positionable in the Y-axis direction. Carriage base, a carriage that can be moved and positioned on the carriage base in the X-axis direction orthogonal to the Y-axis direction, and a plurality of work clamp devices that can move in the X-axis direction on the carriage. . A plurality of work clamp devices cannot avoid a dead zone, which is an interference region with a work machining part or a die, and cannot perform machining within the movable range of the work clamp device in the X axis direction. When machining, it is possible to change the clamp position and re-grip the work.

Referring to FIGS. 9 and 10, the work clamper 103 of each work clamp device 101 has a clamp cylinder 10 connected to a hydraulic pressure supply source via a hydraulic circuit.
5 and is configured to clamp and unclamp the work. In addition, each work clamp device 10
1 is a guide rail 109 provided on the carriage 107
Is provided so as to be movable and adjustable along.

For example, as shown in FIG. 10, a clamp holding member 113 having substantially the same length is provided on the upper portion of the clamp body 111 as the long groove guide portion 115 and the long groove flange portion 1.
A clamp bar 119 for locking the work clamp device 101 to the carriage base is attached to the upper end surface of the carriage base (not shown).
Are integrally extended and provided in the X-axis direction. That is, with the clamp bar 119 positioned in the long groove guide portion 115 so as to be sandwiched between the long groove flange portions 117 of the clamp holding member 113 from above and below, the clamp body 11 is held.
1 is provided so as to be movable in the X-axis direction.

The clamp holding member 113 has a cylinder portion 1
21 is provided, and a carriage base side lock cylinder 123 for pressing and separating the clamp bar 119 and the long groove flange portion 117 is provided at the rear end of the cylinder portion 121 so as to be movable in the left and right directions in FIG. ing. That is, the carriage base side lock cylinder 123 locks and unlocks the work clamp device 101 to the carriage base via the clamp holding member 113.

Further, a carriage-side lock cylinder 125 is provided on the left side of the cylinder portion 121 in FIG. 9, and a toggle is provided at the front end of the piston rod 127 of the carriage-side lock cylinder 125 on the left side of FIG. 9. The clamp body 111 is provided on the guide rail 109 of the carriage 107 in a lockable / unlockable manner by an upper lip 131 that moves up and down via a mechanism 129.

Therefore, when the piston rod 127 of the carriage-side lock cylinder 125 moves to the right in FIG. 10, the upper lip 131 moves upward through the toggle mechanism 129, so that the clamp body 111 causes the guide rail 109 of the carriage 107. Unlocked by. At this time, the carriage base side lock cylinder 12
When the work clamper 103 is locked to the carriage base via the clamp holding member 113 by 3, the carriage 107 can move in the X-axis direction regardless of the work clamper 103.

On the other hand, the carriage side lock cylinder 125
When the piston rod 127 is moved leftward in FIG. 9 by operating in reverse, the upper lip 131 moves downward via the toggle mechanism 129 and is locked to the guide rail 109. Are locked to the carriage 107. At this time, the clamp holding member 113 is unlocked from the carriage base by the carriage base side lock cylinder 123, so that the work clamper 103 can move in the X axis direction integrally with the carriage 107.

[0009]

By the way, the conventional work clamp device 101 operates the carriage side lock cylinder 125 and the carriage base side lock cylinder 123 to grip the work while gripping the guide rail 109 and the clamp bar 119. However, in this case, the movement and positioning of the work by the clamp device and the machining of the work are interrupted, and in order to perform one grip change with one work clamp device 101, for example, about 7 Since it takes a second, there is a problem that, for example, if the four work clamp devices 101 are moved separately and gripped, a loss of tact time of about 1 minute occurs.

Further, for example, it takes about 8 seconds or more for the work clamper 103 of the work clamping device 101 to automatically avoid the interference between the punch and the die made of the die during punching processing. There was a problem that the loss of.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to position a plate material for a plate material processing machine capable of reducing a dead time for avoiding a dead zone and a change time of a work piece for changing a clamp position. An object is to provide a device and a plate material positioning method using the device.

[0012]

In order to achieve the above object, a plate material positioning apparatus for a plate material processing machine according to the present invention according to claim 1 is a plate material positioning apparatus for positioning a plate-shaped workpiece with respect to a processing portion of the plate material processing machine. In the apparatus, a carriage base that can be moved and positioned in the Y-axis direction is provided, an X-axis guide rail extending in the X-axis direction orthogonal to the Y-axis direction is provided on the carriage base, and a linear motor of the linear motor is provided on the X-axis guide rail. A main body carriage provided with a stator extending in the X-axis direction, movable along the X-axis guide rail in the X-axis direction, and provided with a mover facing the stator, and the main body carriage in the Y-axis direction. A plurality of work clamp devices, each of which includes a work clamper that is movable back and forth, are independently provided so as to be movable and positionable in the X-axis direction. The opposing surfaces of the child and the movable element and is characterized by comprising providing a Z-axis direction substantially perpendicular to the X-axis direction and the Y-axis direction.

Therefore, the stator of the linear motor is provided on the carriage base, and the mover of the linear motor is provided on the main body carriage of each of the plurality of work clamp devices. The positioning is done individually. Further, the main body carriage is lightened by the linear motor and the moving and positioning is performed at high speed. In particular, since the surfaces of the stator and the mover that face each other are provided in the Z-axis direction, the linear motor portion becomes even more compact, and the suction force of the mover and the stator causes deflection in the main body carriage. It is possible to avoid an adverse effect such as giving a vehicle and impeding running performance.

According to a second aspect of the present invention, there is provided a plate material positioning device for a plate material processing machine, which is a plate material positioning device for positioning a plate-like work with respect to a processing portion of the plate material processing machine. And an X-axis guide rail extending in the X-axis direction orthogonal to the Y-axis direction is provided on the carriage base, and a stator of the linear motor is extended on the X-axis guide rail in the X-axis direction. Work clamp including a main body carriage that is movable along the X axis guide rail in the X axis direction and has a mover facing the stator, and a work clamper provided on the main body carriage so as to be movable back and forth in the Y axis direction. At least three devices are provided so as to be independently movable and positionable in the X-axis direction, and at least three devices are provided.
While the workpiece is clamped and moved by more than one workpiece clamp device, while the workpiece is being clamped by at least two workpiece clamp devices, another workpiece clamp device is unclamped to perform the workpiece machining. The reverse feed command section for giving a command to reverse feed in the opposite direction, and unclamping another work clamp device while continuing the work clamp by at least two work clamp devices and the work machining direction The present invention is characterized in that a control device provided with a follow-up command unit for giving a command to make a follow-up in the same direction is provided.

Therefore, if necessary, the work clamp device is unclamped, and then the work clamp device can re-grip the work without interrupting the work machining by feeding back or following the work, thereby reducing the loss time. It

According to a third aspect of the present invention, there is provided a plate material positioning device for a plate material processing machine according to the second aspect of the present invention, wherein in the plate material positioning device of the second embodiment, the surfaces of the stator and the mover facing each other are arranged in the X-axis direction. And Z, which is almost orthogonal to the Y-axis direction
It is characterized in that it is provided in the axial direction.

Therefore, since the surfaces of the stator and the mover that face each other are provided in the Z-axis direction, the linear motor portion becomes compact and the suction force of the mover and the stator imparts a flexure to the main body carriage. As a result, adverse effects such as impediment to driveability are avoided.

In the plate material positioning method of the present invention according to claim 4, the carriage base of the plate material positioning device is moved in the Y-axis direction, and is provided on the carriage base so as to extend in the X-axis direction orthogonal to the Y-axis direction. At least three work clamp devices are independently moved along the X-axis guide rail to position the plate-like work clamped by the work clamper of each work clamp device with respect to the processing portion in the plate material processing machine. In the plate material positioning method, another work clamping device is used while the work is clamped and moved by the at least three work clamping devices and the work clamping by the at least two work clamping devices is continued during the machining of the work. Unclamps and reverse feeds in the direction opposite to the workpiece machining direction, and Alternatively, the workpiece is gripped by moving in the same direction as the workpiece machining direction and the workpiece is positioned by the workpiece clamping device during clamping without interrupting the workpiece machining. is there.

Therefore, if necessary, the work clamp device is unclamped, and then the work is re-gripped without interrupting the work processing by feeding back or following the work, thereby reducing the loss time.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of 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 as a plate material processing machine according to this embodiment has a gate-shaped main body frame 3, and the main body frame 3 is a lower frame 5. The upper frame 7 is connected by the left and right side frames 9a and 9b, and the lower frame 5
A work space 11 is formed between the upper frame 7 and the upper frame 7.

The turret punch press 1 is provided with an upper turret 17 and lower turrets 17 and 19 which support a large number of punches 13 and dies 15 in a detachable manner. The upper and lower turrets 17 and 19 are provided so as to be synchronously rotated in the horizontal direction by a rotation driving means (not shown) so that a die including a desired punch 13 and a die 15 can be rotationally indexed to a processing center position 21. There is.

The upper frame 7 is provided with a ram 25 having a striker 23 on its lower surface, which strikes the punch 13 indexed to the processing center position 21 by the rotation of the upper and lower turrets 17 and 19 and is vertically movable. There is. Although the driving means of the ram 25 is not shown, a known hydraulic driving method using a hydraulic cylinder or a known mechanical method using an eccentric crank mechanism can be used for the ram driving means.

On the right side in FIG. 2 of the working space 11,
That is, the plate material positioning device 27 is provided to the right of the upper and lower turrets 17 and 19. The plate material positioning device 27 includes a carriage base 29 that is movable in the Y-axis direction.
And a carriage 31 movable on the carriage base 29 in the X-axis direction, a work clamp device 33 mounted on the carriage 31, and the like.

The above-mentioned carriage base 29 is provided so as to extend outside the lower frame 5 while straddling the fixed work table 35 provided on the lower frame 5 in the Y-axis direction, and is fixed to the carriage base 29. Side tables 37 that move integrally with the carriage base 29 on both sides of the work table 35 are provided. The fixed work table 35 and the side table 37 have work support surfaces of the same height.

The above-mentioned carriage base 29 is provided movably on Y-axis guide rails 39 provided on both sides of the lower frame 5, and is provided along the Y-axis guide rails, for example, an LDM type Y-axis linear. Y by motor 39
It is provided so that it can be positioned at any position in the axial direction.

On the carriage base 29, there is provided, for example, a guide rail support member 41 as an X-axis guide rail that is vertically long in cross section, for example, has an inverted T-shaped cross section and extends in the X-axis direction. A pair of guide rail portions 43 are provided on the left and right side surfaces of the lower portion of the guide rail support member 41 in FIG. 3 so as to extend in the X-axis direction. On the left and right side surfaces of the upper portion of the guide rail support member 41 in FIG. 3, for example, a stator 47 of an LDM type X-axis linear motor 45 is attached so as to extend in the X-axis direction.

At least three work clamp devices 33 are provided on the guide rail support member 41 so as to be movable in the X-axis direction. In this embodiment, the main body carriages 49a, 49b, 49c, 49d of the four work clamp devices 33a, 33b, 33c, 33d have a cross-sectional shape extending over the upper portion of the guide rail supporting member 41 to form a guide rail supporting member. It is movably engaged in the X-axis direction along the guide rail portion 43 via the lower guide member 51 of 41.

For the guide rail portion 43 and the guide member 51, for example, a linear motion bearing (commercially available product name LM guide) can be used.

Further, on the inner surface of each of the main body carriages 49a to 49d, a linear motor for the X-axis is provided at a position facing the stator 47 of the guide rail support member 41 with a minute gap of 0.4 to 1.0 mm, for example. Forty-five movers 53 are attached.

As the stator 47 on the guide rail supporting member 41 side, for example, secondary permanent magnets are laid in two rows in the X-axis direction at a constant pitch. The two rows of the stators 47 are arranged in a “C” shape in order to maintain the linear directionality of the driving force. An electromagnet is used as the mover 53.

The work clamp devices 33 and the X-axis linear motor 4 in the plate positioning device 27 described above.
5, the Y-axis linear motor 39 is connected to the controller 55 shown in FIG. 5, respectively.

With the above structure, a desired main body carriage 49 among the four main body carriages 49a to 49d is selected.
By driving the mover 53 (for example, 49b) based on a command from the control device 55, the main body carriage 49 (for example, 49b), that is, the work clamp device 33 (for example, 33b) is moved to a desired position on the X axis. Can be individually positioned.

In this case, the stator 47 of the X-axis linear motor 45 is provided on the left and right side surfaces of the upper portion of the guide rail support member 41.
That is, the main body carriage 49 is attached so as to face the Z-axis direction, has a cross-sectional shape that extends over the upper portion of the guide rail support member 41, and the movable element 53 faces the stator 47 on the main body carriage 49. Since the main body carriage 49 is compact, it is attached to
It is possible to avoid such an adverse effect that the suction force of the stator 3 and the suction force of the stator 47 give the main body carriage 49 a flexure and hinder the traveling performance.

Since the linear DC motor (LDM) has high positioning accuracy and is capable of high-speed reciprocating motion and low-speed motion, it is a linear motor suitable for high-speed positioning of a work clamp of a plate processing machine which requires high positioning accuracy. Is one.

Referring to FIGS. 3 and 4, the work clamp device 33 is mounted on each of the main body carriages 49a to 49d.
Work clamp retracting means 57 for retracting in the axial direction is provided. The work clamp retracting means 57 includes a slider 59 on which the work clamp device 33 is mounted, an avoidance guide 61 for guiding the slider 59 in the Y-axis direction, a retracting cylinder 63 for driving the slider 59, and the like.

The avoidance guides 61 are provided on the left and right sides of the slider 59 in FIG. 4, and the sliders 59 are movable in the Y-axis direction along the avoidance guides 61 extending in the Y-axis direction. The escape cylinder 63 is provided above the slider 59, and the piston rod 65 of the escape cylinder 63 is connected to the main body carriage 49, so that the slider 59 is retracted by the operation of the escape cylinder 63. This retracted amount is, for example, 50 mm.

A clamp mounting member 67 is provided on the front wall surface of the slider 59, and the clamp mounting member 67 is provided with a known clamper 71 for opening and closing the upper clamp jaw with respect to the lower fixed clamp jaw by a pneumatic cylinder 69. ing.

Referring to FIG. 5, the control device 55 has a CPU 73 as a central processing unit, and an input device 75 and a display device 77 for inputting data such as work information, mold information to be used, and machining programs. And a memory 79 for storing the input data is connected.

Further, the CPU 73 is connected to a clamp device command section 81 which gives commands such as clamping and unclamping the work W in the work clamp device 33 and moving the work clamp device 33 in the X-axis direction. .

Further, the above-mentioned clamp device command section 81 includes at least two or more work pieces as required while the work W is being clamped and processed by at least three or more work clamp devices 33. Clamp device 33
A reverse feed command unit 83 that gives a command to unclamp the other work clamp device 33 while continuing the work clamp by, and give a reverse feed in the direction opposite to the workpiece machining direction.
A follow-up command unit 85 is provided which gives a command to unclamp another work clamp device 33 and continue the work in the same direction as the workpiece machining direction while continuing the work clamp by at least two work clamp devices 33. ing.

With the above structure, referring to FIG. 6, the work W is clamped by at least three work clamp devices 33, and in this embodiment, four work clamp devices 33 for punching. In FIG. 6, for example, during the movement to the right for positioning at the punching position, for example, immediately before the work clamp device 33b is positioned in the interference range (dead zone) with the die 15, the work clamp device 33b is positioned. After the work W is unclamped by the work piece 33b, the work cylinder 63 is actuated to move the work clamp device 33b backward. Then, the operation of the X-axis linear motor 45 moves to the left in FIG. 6 (the other work clamps 33a, 3
3c, 33d, and the work clamp device 33b moves forward by the retracting cylinder 63 to clamp the work W.

Therefore, the work clamp device 33b can easily avoid the clamp dead zone without interrupting the punching process, and the loss time can be reduced.

Incidentally, in FIG. 6, the work clamp device 3
In the case of 3c, the work clamp device 33c is moved immediately before being positioned in the interference range (dead zone) with the die 15 during movement to the left for positioning in the punching position in FIG. FIG. 6 shows a state where the work W is unclamped and then retracted, and the work W is clamped again after being fed back to the right direction (the direction opposite to the moving direction of the other work clamps 33a, 33b, 33d). There is.

Further, in FIG. 6, for example, during movement to the right for positioning at the punching position, for example, the work clamp devices 33b and 33c simultaneously move to the die 15 at the same time.
Immediately before positioning in the interference range (dead zone) with the workpiece clamp devices 33b and 33c, the workpiece W is unclamped and then retracted. After that, the work clamp device 33b feeds back in the left direction in FIG. 6 (direction opposite to the moving direction of the other work clamp devices 33a and 33d) and then clamps the work W again, while the work clamp device 33c moves right in FIG. In the direction (the same direction as the movement direction of the other work clamp devices 33a and 33d), the work W is clamped again. At this time, the work clamp device 33c can move (follow) at a higher speed than the moving speed of the work clamp devices 33a and 33d that are moving to position the work W.

Referring to FIG. 7, a partial view in which the processed product is in a separated state, that is, in a skeleton state.
The left side of may be flapping when processing the remaining unprocessed part. In this case, for example, the work clamp device 33
7 is moving rightward in FIG. 7, the work clamp device 33a unclamps the work W and retracts, and then moves leftward in FIG. 7 (moving direction of the other work clamps 33b to 33d). It can be sent back in the opposite direction) to recapture the part in the skeleton state. Alternatively, when the work clamp devices 33a to 33d are moving leftward in FIG. 7 at a speed of, for example, 100 m / min, the work clamp device 33a unclamps the work W and retracts, and then the work clamp device 33b. ~ 3
When it is positioned at a position to be re-clamped by driving to the left in FIG. 7 at a speed faster than 3d, for example 160 m / min, re-grasp the skeleton part at the same speed as other clamp devices. You can

Here, an example has been shown in which only the work clamp device 33a is reversely fed or chased to re-grip the portion in the skeleton state.
It is also possible to re-grasp the skeleton state portion by reversing or following each of a and 33b.

Referring to FIG. 8, when the machined portion is cut off, the work clamp device 33a that clamps the machined vicinity is no longer necessary, so that the other work clamp devices 33b to 33d are connected to the work W. 8 and move to the right in FIG. 8 at a speed of 100 m / min, for example, the work clamp device 33a unclamps the work W and retracts, and then the work clamp devices 33b to 33d.
At a higher speed, for example, a speed of 160 m / min, it is possible to follow the rightward direction in FIG.

As described above, the work clamp device 33 is unclamped as necessary, and then the work clamp device 3 is reversely fed or further driven without interrupting the work processing.
It is possible to change the grip of the work W, such as avoiding the dead zone of 3. By the way, in this embodiment, since dead zone avoidance is performed within 1 second, the loss time as in the prior art is reduced.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. In this embodiment, the turret punch press is described as an example of the plate material processing machine, but other punch presses, laser processing machines, and other plate material processing machines may be used.

[0051]

As can be understood from the above description of the embodiments of the invention, according to the invention of claim 1, a linear motor stator is provided on a carriage base, and a plurality of workpiece clamping devices are provided. Since the mover of the linear motor is provided on the main body carriage, each work clamp device can be individually positioned in the X-axis direction. In addition, the main body carriage can be lightened by the linear motor, and the moving and positioning can be performed at high speed. In particular, since the surfaces of the stator and the mover that face each other are provided in the Z-axis direction, the linear motor portion becomes even more compact, and the suction force of the mover and the stator imparts bending to the main body carriage. It is possible to avoid adverse effects such as hindering driving performance.

According to the invention of claim 2, if necessary,
Since the dead zone of the work clamping device can be avoided and the work can be grasped without interrupting the work processing by unclamping the work clamping device and then reversely feeding or following the work, loss time can be reduced.

According to the third aspect of the present invention, since the surfaces of the stator and the mover that face each other are provided in the Z-axis direction, the portion of the linear motor becomes compact and the attraction force between the mover and the stator is increased. It is possible to avoid an adverse effect such as that the main body carriage is deflected to hinder the traveling performance.

According to the invention of claim 4, if necessary,
Since the work clamp device can be unclamped and then re-feeded and / or chased to re-grip the work without interrupting the work processing, loss time can be reduced.

[Brief description of drawings]

FIG. 1 is a partial plan view of a turret punch press according to an embodiment of the present invention.

FIG. 2 is a schematic front view of the turret punch press according to the embodiment of the present invention.

FIG. 3 shows an embodiment of the present invention and is a side surface including a cross section of a main part of a plate material movement positioning device.

FIG. 4 is a front view seen from the left side of FIG.

FIG. 5 is a block configuration diagram of a control device.

FIG. 6 is an explanatory diagram of a dead zone avoiding operation in punching processing.

FIG. 7 is an explanatory diagram of a grip change operation in punching processing.

FIG. 8 is an explanatory diagram of a grip change operation in punching processing.

FIG. 9 is a plan view of a conventional work clamp device.

FIG. 10 is a side view of a conventional work clamp device.

[Explanation of symbols]

1 Turret punch press (plate material processing machine) 21 Processing center position 27 Plate positioning device 29 Carriage base 31 carriage 33a-33d Work clamp device 41 Guide rail support member (X-axis guide rail) 43 Guide rail part 45 X-axis linear motor 47 Stator 49a to 49d Main body carriage 53 mover 55 Control device 57 Work clamp saving means 59 Slider 61 Avoidance Guide 63 Retracting cylinder 81 Clamping device command section 83 Reverse command unit 85 Follow-up command section

Claims (4)

[Claims] 1. A plate material positioning device for positioning a plate-shaped workpiece with respect to a processing part of a plate material processing machine, wherein a carriage base movable and positionable in the Y-axis direction is provided, and the carriage base is orthogonal to the Y-axis direction. An X-axis guide rail extending in the X-axis direction is provided, and a stator of a linear motor is provided on the X-axis guide rail so as to extend in the X-axis direction, so that the linear motor can travel in the X-axis direction along the X-axis guide rail. In addition, a plurality of work clamp devices, each of which is composed of a main body carriage having a mover facing the stator and a work clamper provided on the main body carriage to move back and forth in the Y-axis direction, are independently moved in the X-axis direction. Z that is provided so as to be positionable, and the surfaces of the stator and the mover that face each other are substantially orthogonal to the X-axis direction and the Y-axis direction.
A plate material positioning device for a plate material processing machine, which is provided in an axial direction. 2. A plate material positioning device for positioning a plate-shaped workpiece with respect to a processing part of a plate material processing machine, wherein a carriage base movable and positionable in the Y-axis direction is provided, and the carriage base is orthogonal to the Y-axis direction. An X-axis guide rail extending in the X-axis direction is provided, and a stator of a linear motor is provided on the X-axis guide rail so as to extend in the X-axis direction, so that the linear motor can travel in the X-axis direction along the X-axis guide rail. In addition, at least three work clamp devices each including a main body carriage provided with a movable element facing the stator and a work clamper provided on the main body carriage so as to be movable back and forth in the Y-axis direction are independently provided as X.
It is provided so as to be movable and positionable in the axial direction, and while the work is being clamped and moved by the at least three work clamp devices, the work clamp by at least two work clamp devices is being continued. Of the other work while the work clamp by at least two or more work clamp devices is being continued, and a reverse feed command section that gives a command for unclamping the work clamp device to reversely feed the work in the opposite direction to the work machining direction. A plate material positioning device for a plate material processing machine, comprising: a control device provided with a follow-up command section for unclamping the clamp device and giving a command to follow the same direction as the workpiece machining direction. 3. The surfaces of the stator and the mover facing each other,
The plate material positioning device for a plate material processing machine according to claim 2, wherein the plate material positioning device is provided in a Z axis direction substantially orthogonal to the X axis direction and the Y axis direction. 4. A carriage base of a plate material positioning device is moved in the Y-axis direction, and at least three carriage bases are provided along the X-axis guide rail extending on the carriage base in the X-axis direction orthogonal to the Y-axis direction. In the plate material positioning method of independently moving the above work clamp devices and positioning the plate-like work clamped by the work clamper of each work clamp device with respect to the processing portion in the plate material processing machine, at least three or more While the workpiece is being clamped and moved by the workpiece clamp device, the other workpiece clamp devices are unclamped while the workpiece is being clamped by at least two workpiece clamp devices and the workpiece machining direction is changed. Reverse feed in the opposite direction and / or run in the same direction as the workpiece machining direction Plate positioning method, characterized in that for positioning the workpiece in the workpiece clamping device in the above clamp without interrupting the work process performs re gripping of the workpiece by.