JPH11226831A - Workpiece clamp device for plate material work device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily clamp a heary or large workpiece. SOLUTION: In a workpiece clamp device 30 for a plate material work device provided with a reference positioning means, a clamp base 33 is provided on a work table 7, a lower part clamp nail 41 provided with a movable workpiece insertion guide 39 is turnably provided in the clamp base 33, an upper part clamp nail 45 capable of clamping a workpiece in cooperation with the lower part clamp nail 41 is provided, the upper and lower clamp nails are provided in the clamp base 33 so as to be turnable from a horizontal position to a vertical position, and a fixed workpiece insertion guide 59 is provided in the clamp base 33, which guides the workpiece between the upper and lower clamp nails in cooperation with the movable workpiece insertion guide 39 when the lower part clamp nail 41 is placed in a vertical position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a work clamping device for a plate processing apparatus.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 7-178583, which is an invention of the present applicant, is a known prior art document relating to the present invention.

[0003] Japanese Patent Application Laid-Open No. Hei 7-178583 discloses FIG.
A work clamp 100 as shown in FIG. The work clamp 100 clamps a work W placed horizontally on a processing table 151 of a laser processing machine 150 as shown in FIGS. 7 and 8, for example, and is provided horizontally on a clamp base 153 of the work table 151. is there.

[0004]

The above-described work clamp 100 includes a clamp jaw 103 for pressing a work W,
A clamp base 105 for mounting a work, a slide base 107 for supporting the clamp base 105, and a hydraulic cylinder 11 for pushing up the clamp jaw 103
1, clamp jaw 103 and clamp base 10
5 are connected to each other.

In order to clamp the work W with the clamp 100, the work W is naturally placed on the work table 151.
It must be placed horizontally on top, pulled into the work clamp 100 and moved to the X-axis stopper provided on the processing table 151.

In this case, if the size of the work W is a certain size, the operator can set the work W on the work table 151 with both hands and move the work W to the clamp position.

However, when the size is increased, it is necessary to suspend the work using a crane or a forklift and mount the work on the table.

When the work is hung, the center or both ends of the work hangs down by its own weight regardless of the thickness of the work, so that it is very difficult to place the work on the work table.
It is also dangerous work.

Even if a work is placed on a work table by the above-described means, it is a labor-intensive operation to move the work to the clamp side manually for a large size or thick work. is there. Therefore, usually, it is necessary to provide a work pressing means 155 of a pneumatic or hydraulic mechanism called a work pusher to push the work between the upper clamp jaw 103 and the clamp base 105, which increases the cost of the machine, This is also a factor in reducing reliability.

In order to use the above-mentioned work pressing means 155, it is necessary to provide a large number of free bears 157 (free-stroke bearings) on the work table 151 for supporting and moving the work W lightly. However, during the laser processing, the free bear 157 is exposed to laser light and spatter, so that it is greatly consumed and it is difficult to maintain.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a work clamping apparatus for a plate material processing apparatus capable of easily clamping a heavy work or a large work. It is to provide.

[0012]

According to a first aspect of the present invention, there is provided a work clamping apparatus for a plate material processing apparatus, comprising: a work material reference positioning means; A clamp base is provided on a work table of a plate processing apparatus, and a lower clamp nail provided with a movable work insertion guide is rotatably provided on the clamp base, and the lower clamp nail cooperates with the lower clamp nail to grip a workpiece. A free upper clamp nail is provided, and the lower clamp nail and the upper clamp nail are provided on the clamp base so as to be rotatable from a horizontal position to a vertical position, and the movable work insertion guide is provided when the lower clamp nail is in the vertical position. Work insertion guide that guides the work between the upper and lower clamp nails in cooperation with It is an summarized in that provided on the clamp base.

Therefore, a large and heavy work is hung vertically and mounted on a work clamp device, and the work clamp device with the work mounted is rotated in the horizontal direction to rotate the work table of the plate processing apparatus. Can be placed on top.

According to a second aspect of the present invention, there is provided a work clamp apparatus for a plate material processing apparatus according to the first aspect, wherein the reference positioning means is provided on one of XY feed axes of the plate material processing apparatus. The gist of the present invention is to provide a roller that is rotatable in the axial direction.

Therefore, the workpiece inserted and mounted on the roller of the reference positioning means of the workpiece clamping device is moved in one axial direction of the XY feed shaft of the plate processing apparatus and is moved to the reference stopper of the other feed shaft. The contact operation becomes easy.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an example of the laser beam machine 1 equipped with the work clamping device 30 of the plate material machining apparatus according to the present invention.

The laser beam machine 1 has a bed 3 extending in the front-rear direction (X-axis direction). On this bed 3, an X-axis guide rail 5 extending in the X-axis direction is laid.

On this guide rail 5, a drive motor, a ball screw, a ball nut, etc., not shown, are used.
A work table 7 is provided which can be moved and positioned in the X-axis direction. One side of the work table 7 (X in FIG. 5)
A work clamp device 30 is provided at an appropriate interval (on the right side in the axial direction).

On the bed 3, a gate-shaped frame 1
1 is standing. A Y-axis guide rail 13 extending in the left-right direction (Y-axis direction) is provided on the front side of the beam portion 11a of the portal frame 11, and a drive motor (not shown) is provided on the Y-axis guide rail 13. A Y-axis carriage 15 is provided which can be moved and positioned in the Y-axis direction by a ball screw and a ball nut.

The Y-axis carriage 15 has a built-in laser system (not shown) for condensing and irradiating a laser beam from a laser oscillator (not shown) onto a work W placed on the work table 7. A processing head 17 is provided.

The work table 7 and the laser processing head 17 are controlled by a known NC controller 21 provided on the frame 11 via a bracket 19.

As shown in FIGS. 4 and 5, a work clamp device 30 is attached to one side of the work table 7 at an appropriate interval. Next, details of the work clamp device 30 will be described.

Referring to FIGS. 1 to 4, a clamp base 33 is mounted on the frame 31 on one side of the work table 7 at appropriate intervals. Hinge blocks 35 are attached to both ends of the clamp base 33 in the X-axis direction. A lower clamp nail 41 having a movable work insertion guide 39 is rotatably fitted to a rotating shaft 37 fitted to the hinge blocks 35. Have been combined.

As shown in FIG. 1, the movable work insertion guides 39 are provided on both sides of the lower clamp nail 41 in the X-axis direction. Is provided so as to protrude from the upper end (or the tip) of the. Further, a projection 43 projecting rightward is formed substantially at the center of the lower clamp nail 41, and the projection 43 extends to the inside of a hole 47 provided substantially at the center of the upper clamp nail 45. Let me do it.

The upper clamp nail 45 is
An appropriate angle range is rotatably supported on the rotation shaft 49 fitted to the projection 43. A cylinder 50 is formed at the center lower end of the upper clamp nail 45, and the piston rod 55 of the piston 53 incorporated in the cylinder 50 projects from the cylinder so as to be able to abut the lower end of the lower clamp nail 41. Let me do it.

In the above configuration, if a pressurized fluid from a pneumatic or hydraulic source (not shown) is supplied from a pressurized fluid supply port 51 provided on the cylinder head side of the cylinder 50, the tip of the upper clamp nail 45 becomes , In the direction of the tip of the lower clamp nail 41 (counterclockwise). Therefore, the work W can be held or gripped between the upper and lower clamp nails.

When the supply of the pressurized fluid to the cylinder 50 is stopped, the tip of the upper clamp nail 45 is moved clockwise by the elastic force of the spring 57 inserted between the piston rod side of the piston 53 and the cylinder 50. , And the held work W can be released.

As shown in FIG. 1, the lower clamp nail 41 is formed on both sides of the lower clamp nail 41 when the lower clamp nail 41 is rotated clockwise about the rotation shaft 37 from the horizontal position to the vertical position. The clamp base 33 is provided with a fixed work insertion guide 59 that guides the work W between the upper and lower clamp nails 41 and 45 in opposition to the movable work insertion guide 39.

As shown in FIG. 1, a locking portion 61 is provided on the left side of the clamp base 33 for locking the lower rear surface of the lower clamp nail 41 so that the lower clamp nail 41 stops at the vertical position. It is.

The upper and lower clamp nails 41, 45
Between them, there is provided a positioning means 63 for setting a reference position of the work W in the Y-axis direction. The positioning means 63 is provided with a roller pin 67 on the lower clamp nail 41, and a roller bearing 65 is provided on the roller pin 67.
Is attached. Therefore, it is possible to set the reference position of the work W in contact with the roller bearing 65 in the Y-axis direction and easily move the work W in the X-axis direction.

In a plate processing apparatus equipped with the work clamping device 30 of the plate processing apparatus having the above structure, for example, a laser processing machine 1 as shown in FIG.
The operation in the case where the work table 7 is clamped at the reference position on the work table 7 will be described.

First, as shown in FIG.
The clamp nails above and below 0 are set upward (vertically). Next, the work W is suspended vertically using a crane or a forklift (not shown), and is moved above the work clamp device 30. Thereafter, the crane is gradually lowered, and the lower end of the work W is gradually lowered between the work insertion guides 39 and 59.

The lower end of the work W is
Guided by 9, 59, it enters between the upper and lower clamp nails, and comes into contact with the roller bearing 65 of the positioning means 63 for setting the Y-axis reference, and stops.

Next, in the above state, the crane is moved in the X-axis direction until the side end of the work comes into contact with an X-axis reference stopper (not shown). Then, the positioning ends when the work W comes into contact with the X-axis reference stopper. Thereafter, when a pressurized fluid such as compressed air is supplied to the supply hole 51 of the cylinder 50, the piston 53 projects from the cylinder 50 against the elastic force of the spring 57, and the upper clamp nail 45 is 49
, The workpiece W is strongly clamped between the upper and lower clamp nails 45 and 41 by rotating the work W counterclockwise.

Next, when the crane is further moved down in the Y-axis direction while being further lowered in the above-mentioned state, the upper and lower clamp nails 45 and 41 of the work clamping device are integrally opposed to each other with the rotating shaft 37 as an axis. By rotating clockwise, the workpiece W can be placed at a fixed position on the work table.

[0036]

According to the first aspect of the present invention, in the work clamping device of the plate material processing device, the work insertion opening of the work clamping device is provided rotatably from the horizontal position to the vertical position, so that the size is large. Even for heavy workpieces, by using a lifting machine such as a crane, the workpieces can be vertically mounted and safely mounted on the workpiece clamping device, and placed at a predetermined position on the processing table of the plate material processing device. can do.

According to the second aspect of the present invention, the workpiece inserted and mounted on the roller of the reference positioning means of the workpiece clamping device is moved in one axial direction of the XY feed axis of the plate processing apparatus. The operation of abutting the feed shaft against the reference stopper is facilitated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a left side surface of a work clamping device of a plate processing apparatus according to the present invention.

FIG. 2 is a front view of a work clamping device of the plate processing apparatus according to the present invention.

FIG. 3 is an exploded view of the work clamping device of the plate processing apparatus according to the present invention.

FIG. 4 is a view for explaining the operation of a work clamping device of the plate processing apparatus according to the present invention.

FIG. 5 is an example of a laser beam machine equipped with a work clamping device of the plate material machining apparatus according to the present invention.

FIG. 6 is a work clamp of a conventional plate processing apparatus.

FIG. 7 is a plan view of a laser processing machine equipped with a work clamp of a conventional plate processing apparatus.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laser processing machine 3 Bed 5 Guide rail 7 Work table 11 Gate frame 13 Guide rail 15 Y-axis carriage 17 Laser processing head 19 Bracket 21 NC control device 30 Work clamp device 31 One side frame of table 7 33 Clamp base 35 Hinge Blocks 37, 49 Rotating shaft 39 Movable work insertion guide 41 Lower clamp nail 43 Projection 45 Upper clamp nail 47 Hole 50 Cylinder 51 Supply hole 53 Piston 55 Piston rod 57 Spring 59 Fixed work insertion guide 61 Locking part 63 Positioning means 65 Roller Bearing 67 Roller pin

Claims (2)

[Claims] 1. A work clamp apparatus for a plate material processing apparatus provided with a reference positioning means for a work, wherein a work table of the plate material processing apparatus is provided with a clamp base, and the clamp base is provided with a lower clamp nail provided with a movable work insertion guide. The lower clamp nail is provided with an upper clamp nail capable of gripping a workpiece in cooperation with the lower clamp nail, and the lower clamp nail and the upper clamp nail are disposed on the clamp base from a horizontal position to a vertical position. A fixed work insertion guide that guides a work between the upper and lower clamp nails in cooperation with the movable work insertion guide when the lower clamp nail is in the vertical position. A work clamp device for a plate material processing device. 2. The work clamping apparatus according to claim 1, wherein said reference positioning means is a roller which is rotatable in one axial direction of an XY feed axis of said plate processing apparatus.