JPH11300439A - Plate stock positioning device for plate stock working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a plate stock positioning device for a plate stock working machine having a small time constant of a control system at the time of transfer control of a work clamp. SOLUTION: In a plate stock positioning device 17 for a plate stock working machine, an X axial carriage 23 which freely moves in the X axial direction is provided on a Y axial carriage 19 which freely moves in the Y axial direction, a guide rail 27 and a feed screw 31 which extend in the X axial direction are provided in parallel in the X axial carriage, plural hollow motors 33 having a rotor 35 screwed to the feed screw are screwed to the feed screw and simultaneously provided in the guide rail so as to freely move, a work clamp 43 which freely clamps or releases a plate stock W is provided in each of the plural hollow motors, and the plural hollow motors are independently or synchronously driven. Whereby, the work clamp is independently or synchronously provided so as to be transferred and positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG. 8 shows a known turret punch press 101 equipped with a conventional plate positioning device. In the turret punch press 101, right and left columns 105 and 107 are integrally erected on a lower frame 103.
A beam-shaped upper frame 109 is provided on the upper part of each of 05 and 107 to constitute an integral frame.

A fixed table 111 for supporting the plate material W is provided on the upper surface of the lower frame 103, and a moving table 115 is provided on both front and rear sides of the fixed table 111 via rails 117 attached to the lower frame 103. It is provided movably in the left-right direction (Y-axis direction). The rear moving table and rail are not shown.

[0004] The safety cover 11 on the left side of the fixed table.
Inside 9, there are provided upper and lower turret disks (not shown) on which a number of upper dies (punches) and lower dies (dies) are mounted.

[0005] A plate positioning device 121 for moving and positioning the plate W is provided on the column 107 side. The plate positioning device 121 includes a front moving table 115 and a rear moving table (not shown).
Are integrally connected to each other, and a Y-axis carriage 123, an X-axis carriage 125 provided on the Y-axis carriage 123 so as to be movable in the X-axis direction, and the like.

As shown in detail in FIG. 9, the X-axis carriage 125 is movably provided on an X-axis guide rail 127 extending on the Y-axis carriage 123 in the X-axis direction. An X-axis feed screw 129 such as a ball screw rotatably supported at both ends is provided in parallel with the X-axis guide rail 127.

[0007] The X-axis carriage 125 is provided with a nut portion 131 screwed to the X-axis feed screw 129. An X-axis servomotor 133 that rotates the X-axis feed screw 129 is provided on one side end of the X-axis feed screw 129.
Is provided.

As shown in FIG. 8, a plurality of work clamps 135 for holding and fixing the plate material W are detachably mounted on the front side of the X-axis carriage 125.

The Y-axis carriage 123 is provided so that it can be moved and positioned by a drive mechanism (not shown) and a Y-axis servomotor.

The above-described dynamic positioning of the work clamp 135 is performed by rotating the X-axis feed screw 129 by the X-axis servo motor 133 and moving the X-axis carriage 125.

[0011] On the other hand, Japanese Patent Publication No.
Japanese Unexamined Patent Publication No. 75093 discloses a technique relating to a clamp positioner (a device for automatically adjusting a work clamp interval) in a turret punch press having a configuration similar to that of the turret punch press 101 described above.

In the clamp positioner described above, as shown in FIG. 4, a work clamp (13) is slidably fixed to a clamp guide (25) of an X-axis carriage (15), and a plate support table ( 53) is provided with a stopper (55) which can be moved up and down on the table.

[0013]

In the conventional turret punch press 101 described above, the X-axis carriage 12
5. Inertia (or GD ² ) in terms of drive shaft, which is the sum of X-axis feed screw 129 and work clamp 135
And it is difficult to reduce the time constant of the X-axis carriage 125 during acceleration / deceleration. That is, to reduce the time constant, a larger motor is required, which is practically difficult.

If the rotation speed of the X-axis feed screw 129 increases, the jumping of the feed screw occurs, and there is a limit to the speed of the movement of the work clamp.

On the other hand, when the clamp positioner disclosed in Japanese Patent Publication No. 4-75093 is used,
In the state in which the stopper (55) shown in FIG. 2 of the publication is projected to the upper part of the table, the work clamp (13) and the clamp guide (25) are slidable so that one work clamp (13) is formed. The side of the stopper (55)
After the X-axis carriage (15) is moved until the work clamp (13) is engaged, the X-axis carriage (15) is further moved until the work clamps (13) are appropriately spaced to set the work clamp interval.

Even when the above-described clamp positioner is used, there is a problem that it takes time to adjust the clamp interval due to the influence of the inertia (or GD ² ).

Further, the sliding friction between the work clamp (13) and the clamp guide (25) is large, and there is a risk of locking during operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sheet material positioning apparatus for a sheet material processing machine having a small time constant of a control system during movement control of a work clamp. It is to provide.

[0019]

According to a first aspect of the present invention, there is provided a plate material positioning apparatus for a plate material processing machine, wherein the Y-axis is movable in the Y-axis direction. An X-axis carriage movable in the X-axis direction is provided on the carriage, and a guide rail and a feed screw extending in the X-axis direction are provided on the X-axis carriage in parallel.
A plurality of hollow motors having a rotor screwed to the feed screw are movably provided on the guide rail at the same time as the screw is screwed to the feed screw, and each of the plurality of hollow motors is capable of holding and releasing a plate material. And the plurality of hollow motors are independently or synchronously driven, so that the workpiece clamps can be independently or synchronously moved and positioned.

According to a second aspect of the present invention, there is provided a sheet material positioning apparatus for a sheet material processing machine, wherein
An X-axis carriage movable in the X-axis direction is provided on a Y-axis carriage movable in the axial direction, and an X-axis carriage moving means for moving and positioning the X-axis carriage in the X-axis direction is provided. A guide rail extending in the X-axis direction and a feed screw are provided in parallel, and a plurality of hollow motors having a rotor screwed to the feed screw are screwed to the feed screw and simultaneously movable on the guide rail. The work clamps can be independently or synchronously moved and positioned by separately or synchronously driving the plurality of hollow motors by providing a work clamp capable of gripping and releasing a plate material in each of the plurality of hollow motors. The gist is that it is provided in the.

According to a third aspect of the present invention, there is provided a plate positioning apparatus for a plate processing machine according to the second aspect, wherein the X-axis carriage moving means moves and positions the X-axis carriage by a fixed stroke. The gist is to provide a possible actuator.

Therefore, according to the plate material positioning device of the plate material processing machine according to the first aspect, the work clamp having a small inertia can be directly moved and positioned. The time constant is small, and acceleration / deceleration to the set speed can be performed in a short time.

Further, the clamp interval can be automatically changed to an appropriate interval according to the size of the workpiece.
In addition, it is also possible to automatically change the clamp position during processing.

According to the plate material positioning device of the plate material processing machine according to the second or third aspect, in addition to the function and effect of the first aspect, even in the X-axis carriage whose length in the X-axis direction is short, By moving the X-axis carriage by the X-axis carriage moving means, the moving range of the work clamp can be expanded.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a turret punch press to which a plate positioning device according to the present invention is applied. 2 is an enlarged perspective view of a portion of the plate positioning device of FIG. 1, and FIGS. 3 to 5 are a front view, a plan view, and a right side view of FIG. 2, respectively.

Referring to FIG. 1, for example, a turret punch press 1 is disclosed in Japanese Patent Publication No. 4-63 of the invention of the present applicant.
Since it is the same as that disclosed in Japanese Patent Application Laid-Open No. 622 or the above-described conventional example, only the outline of the configuration will be described.

The main body of the turret punch press 1 has a frame structure in which left and right columns 5 (a, b) are erected on a lower frame 3 and an upper frame 7 is integrally connected to the columns 5 (a, b). Has become.

A fixed table 9 for supporting the plate material W is provided on the upper surface of the lower frame 3, and a movable table 11 is provided on both front and rear sides of the fixed table 9 via rails 13 attached to the lower frame 3. It is provided movably in the Y-axis direction (left-right direction). The above-mentioned rear moving table and rail are not shown.

The safety cover 1 on the left side of the fixed table 9
Inside 5 are provided upper and lower turret disks (not shown) on which a number of upper dies (punches) and lower dies (dies) are mounted. A plate material W is provided on the support 5b side.
There is provided a plate material positioning device 17 for performing the movement positioning of the plate.

The plate positioning device 17 is provided with a Y-axis carriage 19 which integrally connects the front movable table 11 and a rear movable table (not shown) across the fixed table.

Therefore, the Y-axis carriage 19 is provided movably in the Y-axis direction via the rails 13 (a, b). The Y-axis carriage 19 is provided so as to be movable and positionable by an NC controller and a Y-axis driving mechanism (not shown).

As shown in detail in FIG. 2, a guide rail 21 composed of an LM guide (trade name) extending in the X-axis direction (a direction orthogonal to the Y-axis) is laid on the Y-axis carriage 19. . The guide rail 21 is provided with an X-axis carriage 23 formed of a hollow box-shaped cylinder so as to be movable in the X-axis direction via a plurality of linear motion bearings 25.

The left side of the X-axis carriage 23 (FIG. 2,
On the left side of FIG. 5, a guide rail 27 composed of an LM guide or the like extending in the X-axis direction is horizontally laid. Further, at both ends of the X-axis carriage 23 in the X-axis direction,
A bracket 29 (a, b) is provided, and a feed screw 31 such as a ball screw is fixedly supported on the bracket 29 (a, b). The feed screw 31 is provided horizontally in the X-axis direction and parallel to the guide rail 27.

The feed screw 31 is screwed with a female screw portion (not shown) formed of a ball screw provided inside the rotor 35 of the hollow motor 33. In addition, the hollow motor 3
A stator 39 having a coil for exciting the rotor 35 is disposed on a housing 37 of the third housing, and a linear motion bearing (not shown) that engages with the guide rail 27 is attached to the housing 37. The rotor 35 is rotatably fixedly supported by bearings 41 (a, b) provided on the housing 37.

The side of the housing 37 in the processing center direction (Y
A dovetail-shaped clamp rail 45 for mounting the work clamp 43 is provided on the side surface (axis + side), and the work clamp 43 is detachably mounted on the clamp rail 45.

In the embodiment, the hollow motor 33 of the work clamp 43 provided with upper and lower clamp claws operated by a pneumatic cylinder is provided with the feed screw 31 and the guide rail 27.
Are provided so as to be movable and positionable.

The right side surface of the X-axis carriage 23 (FIG. 2)
) Is provided with a bracket 47 protruding in a direction opposite to the bracket 29a. This bracket 4
The piston rod 51 of the pneumatic cylinder 49 is fixed to 7.

The pneumatic cylinder 49 is provided on the right side (in FIG. 2) of the X-axis carriage 23 in parallel with the X-axis direction.
Is fixed to a support block 55 provided on the Y-axis carriage 19.

When the piston rod 51 of the pneumatic cylinder 49 advances, a positioning stopper 57 is provided on the Y-axis carriage 19 so that the bracket 47 abuts at a certain position. In addition, the plate positioning device 17 includes an N-illustration, similarly to the Y-axis carriage 19.
It is provided so as to be totally controlled by a C control device.

Next, the operation of the plate positioning device 17 having the above configuration will be described.

As shown in FIG. 2, two work clamps 43 are provided.
In order to move the plate material W clamped on the workpiece clamp to an appropriate position in the X-axis direction, the hollow motor 33 provided on the work clamp 43 may be simultaneously driven in the same direction in synchronization.

When changing the clamp width, as shown in FIG. 6, the clamp width (position) can be changed by appropriately rotating the hollow motor of the work clamp 43A. The work clamp 43B is not driven to rotate.

When the work clamp 43 is moved to a position beyond the moving range of the feed screw 31 of the X-axis carriage 23, the piston rod 51 of the pneumatic cylinder 49 is advanced so that the stroke of the piston rod is reduced. Only the moving range of the feed screw 31 can be expanded.

In the above-described embodiment, an example in which a pneumatic cylinder is used for moving the X-axis carriage 23 has been described.
For example, an appropriate actuator such as a drive mechanism using a rack and a pinion can be adopted.

Further, as shown in FIG. 7, three work clamps 43 (A, B, C) are used. For example, a dead zone (unprocessable region) around the tip of the work clamp 43B is formed in the lower part. When approaching the mold (die), the clamp of the work clamp 43B is released, and the hollow motor of the work clamp 43B is appropriately rotated to drive the dead zone around the tip of the work clamp 43B and the lower mold (die). The dead zone can be machined by moving to a position where the interference with ()) is released and clamping it again.

[0047]

According to the first aspect of the present invention, the work clamp having a small inertia can be directly moved and positioned by the hollow motor having a small inertia. The time constant is small, and acceleration / deceleration to the set speed can be performed in a short time.

Further, the clamp interval can be automatically changed to an appropriate interval according to the size of the workpiece.
In addition, it is also possible to automatically change the clamp position during processing.

Further, since the work clamp is moved and positioned by the feed screw having a small frictional resistance, the work clamp is not locked during the movement, so that the reliability of the machine is improved and the unmanned operation at night can be performed.

According to the invention of claim 2 or claim 3,
In addition to the functions and effects of the first aspect of the present invention, even in an X-axis carriage having a short length in the X-axis direction, the X-axis carriage moving means moves the X-axis carriage to expand the moving range of the work clamp. Can be.

[Brief description of the drawings]

FIG. 1 shows a turret punch press to which a plate positioning device according to the present invention is applied.

FIG. 2 is an enlarged perspective view of a part of the plate positioning device of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a plan view of FIG. 2;

FIG. 5 is a right side view of FIG. 2;

FIG. 6 is an operation explanatory diagram in a case where the clamp width is changed by the plate positioning device according to the present invention.

FIG. 7 is an operation explanatory diagram of a method for avoiding a dead zone of a work clamp in a case where a dead zone of a work clamp (an unworkable region) approaches a lower mold (die) in the plate positioning apparatus according to the present invention;

FIG. 8 is a view showing a known turret punch press provided with a conventional plate positioning device.

FIG. 9 is a detailed view of a plate material positioning device in FIG. 8;

[Explanation of symbols]

 Reference Signs List 1 Turret punch press 3 Lower frame 5a Left support 5b Right support 7 Upper frame 9 Fixed table 11 (F, B) Moving table 13 (a, b) Rail 17 Plate positioning device 19 Y axis carriage 21, 27 Guide rail 23 X axis Carriage 25 Linear motion bearing 29 (a, b) Bracket 31 Feed screw 33 Hollow motor 35 Rotor 37 Housing 39 Stator 41 Bearing 43 Work clamp 45 Clamp rail 47 Bracket 49 Pneumatic cylinder 51 Piston rod 53 Cylinder head part 55 Support block 57 Positioning Stopper W Plate

Continued on the front page (72) Inventor Kinshiro Naito 318-3 Ishida, Isehara-shi, Kanagawa

Claims (3)

[Claims] In a sheet material positioning device of a sheet material processing machine, an X-axis carriage movable in an X-axis direction is provided on a Y-axis carriage movable in a Y-axis direction, and the X-axis carriage is extended in the X-axis direction. A guide rail and a feed screw are provided in parallel, and a plurality of hollow motors having a rotor screwed to the feed screw are screwed to the feed screw and movably provided on the guide rail at the same time. Each of the motors is provided with a work clamp capable of holding and releasing a plate material, and the plurality of hollow motors are independently or synchronously driven, so that the work clamps can be independently or synchronously moved and positioned. A sheet material positioning device for a sheet material processing machine. 2. A plate positioning apparatus for a plate processing machine, wherein an X-axis carriage movable in the X-axis direction is provided on a Y-axis carriage movable in the Y-axis direction, and the X-axis carriage is moved in the X-axis direction. An X-axis carriage moving means for positioning is provided, a guide rail extending in the X-axis direction and a feed screw are provided in parallel on the X-axis carriage, and a plurality of hollow motors having a rotor screwed to the feed screw are provided. At the same time as being screwed into the feed screw, the work rail is provided movably on the guide rail, and a work clamp capable of gripping and releasing the plate material is provided for each of the plurality of hollow motors, and the plurality of hollow motors are independently or synchronously driven. Wherein the work clamp is provided so as to be able to move and position independently or synchronously. 3. The X-axis carriage moving means is provided with an actuator capable of moving and positioning the X-axis carriage by a predetermined stroke.
A plate material positioning device for a plate material processing machine according to claim 1.