JP2000094040A - Method and device for plate bending - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change the clamping of a small-sized and notched plate. SOLUTION: In bending a plate, when the plate is carried in as clamped by a manipulator 7, the clamping of the plate is changed using a pull-in clamp unit 11 by a manipulator 7, the pull-in clamp 11 is moved in the direction orthogonal to the plate carry in direction and the plate is clamped, even in the case of the plate of notched or small-sized, the plate is surely clamped, changing for clamping of the plate is made possible.

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 bending a plate material which is supplied by a manipulator by changing a plate material.

[0002]

2. Description of the Related Art Referring to FIG.
01, the top die 103 and the bottom die 105
The plate material W is bent by moving a bending die (not shown) up and down with respect to the plate material W clamped by the above. At this time, the manipulator 107 provided in front of the bender 101 (left side in FIG. 5)
The plate material W is clamped by the clampers 109U and 109L and supplied to the bender 101.

[0003] As described above, when bending the plate material W,
Depending on the size of the plate material W or as the processing progresses, it becomes necessary to replace the plate material W with the manipulator 107. In this case, the plate material W is once clamped by the top die 103 and the bottom die 105, the clampers 109U and 109L are opened, the manipulator 107 is moved to a desired position, and the clampers 109U and 109L are again moved.
It is done to hold again.

[0004] Alternatively, referring to FIG.
A front table 111 for supplying a work W is provided in front of the front table 11.
There is a case where a clamper 113 for holding the plate material W is fixedly provided inside 1.

[0005]

However, in the case where the plate material W is to be replaced by the clampers 109U and 109L using the above-mentioned top die 103 and bottom die 105, as shown in FIG. Length L1 of the tip of the plate material W supplied by 107
Is shorter, the top die 103 and the bottom die 105
Therefore, there is a problem that the plate material W cannot be completely clamped.

Further, when the plate material W is to be gripped by using the clamper 113 provided on the front table 111, the distance L2 is constant because the left and right clampers 113 are fixed, so that the right and left positions of the clamp W If there is a notch or the like, there is a problem in that it cannot be replaced by a clamp.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the above-mentioned conventional technology, and to provide a method of bending a plate material that can easily be replaced by a small-sized plate material or a notched plate material. A plate material bending apparatus is provided.

[0008]

According to a first aspect of the present invention, there is provided a method for bending a sheet material, comprising: bending a sheet material clamped by a manipulator provided in front of a bending machine; Prior to the bending process, the plate material is positioned by a pulling clamp unit provided on a front table provided in front of the bending machine so as to be movable in a direction orthogonal to the direction of loading into the bending machine. In the method of bending a plate material, the bending is performed after the bending, and the plate material is grasped by the manipulator using the pulling clamp unit and is carried into the bending machine.

Therefore, when bending a plate material, the plate material is clamped and carried by the manipulator, the pulling clamp unit is moved in a direction orthogonal to the carrying direction, the plate material is clamped, and the manipulator is unclamped to a predetermined position. Return to the position, grab the plate and carry the plate into the bending machine.

According to a second aspect of the present invention, there is provided a plate material bending apparatus, wherein a manipulator provided to carry the plate material into the bending machine and a direction perpendicular to the carrying direction for positioning the plate material carried by the manipulator prior to the bending. A pulling clamp unit movably provided in a direction in which the plate material is moved, and at the time of carrying in the plate material, the manipulator uses the pulling clamp unit to replace the plate material.

Therefore, when bending the plate material, the plate material is clamped and carried by the manipulator, the pulling clamp unit is moved in a direction perpendicular to the carrying direction, the plate material is clamped, and the manipulator is unclamped to a predetermined position. Return to the position, grab the plate and carry the plate into the bending machine.

According to a third aspect of the present invention, there is provided the plate bending apparatus according to the second aspect, wherein the pulling clamp unit is allowed to protrude and retract from the front table for loading the plate, and the loading direction to the bending machine. It is characterized by being movable to

Therefore, the pulling clamp unit rises to the top of the front table or moves slightly in the front-rear direction only when positioning the plate and when changing the plate by the manipulator.

[0014]

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

FIG. 1 shows a bending apparatus 1. In the bending apparatus 1, for example, a bender 3 as a bending machine and a front table 5 for supplying a plate material W to the bender 3 are shown.

The X-axis direction of the front table 5 (FIG. 1)
At the center part (middle left / right direction), the plate material W is clamped to Y
A manipulator 7 that moves in the axial direction (vertical direction in FIG. 1) and supplies (loads) the plate material W to the bender 3 is provided movably in the Y-axis direction. The manipulator 7 is provided with a manipulator clamper 8 for clamping the plate material W.

At the center of the front table 5 in the Y-axis direction, a pair of pull-in grippers 9 for clamping the plate material W and pulling the plate W onto the front table 5 is provided movably in the X-axis direction. At a predetermined position on the front table 5, a pair of pulling clamp units 11 for positioning the plate material W is moved in the X-axis direction.
It is provided so that positioning is possible.

With the above structure, the plate material W clamped by the pull-in gripper 9 is placed on the front table 5 as shown in FIG.
, The plate material W is positioned by the pulling clamp unit 11. The positioned plate material W is clamped by the manipulator 7 and moves in the Y-axis direction, and is positioned at a predetermined position of the bender 3 to perform bending.

FIG. 2 shows the pulling clamp unit 11 described above. In the pulling clamp unit 11, the front table 5 is moved in the X-axis direction along a guide rail 13 provided in the X-axis direction.
Positioning is free.

A base plate 15 is provided below the pulling clamp unit 11, and a slider 17 movably supported along the guide rail 13 is provided on a lower surface of the base plate 15.

On the base plate 15, a pulling clamper 23 composed of an upper clamper 19 for clamping the plate material W and a lower clamper 22 moved up and down by a clamping cylinder 21, and the pulling clamper 23 is moved in the X-axis direction. It has an X-direction moving cylinder 25, a Y-direction moving cylinder 27 for moving the pulling clamper 23 in a small stroke in the Y-axis direction, a lifting cylinder 29 for raising and lowering the pulling clamper 23, and the like.

Referring to FIG. 3, a manipulator clamper 8 provided at the tip of the manipulator 7 is provided.
Can be moved and positioned in the Y-axis direction by a ball screw 33 driven to rotate by a motor 31.

Next, the bending method will be described.

First, the plate material W is placed on the front table 5.
After being loaded onto the sheet material, the plate material W to be bent by the manipulator clamper 8 is clamped. If there is a notch or the like in the plate material W, the pulling clamper 23 is positioned in the X direction so that the notch can be clamped, and the pulling clamper 23 is raised by the lifting / lowering cylinder 29 so that the plate material W can be clamped. .

The manipulator 7 is positioned at the end of the plate material W at the position of the pulling clamper 23, and the plate material W is clamped by the pulling clamper 23. The manipulator clamper 8 is unclamped, the manipulator 7 is moved to a predetermined position, and the plate material W is moved by the manipulator clamper 8.
Replace

Unclamp the pulling clamper 23,
The pulling clamper 23 is lowered below the front table 5 by the lifting cylinder 29 and the manipulator 7
To supply the plate material W to the vendor 3, and the vendor 3
To start bending.

From the above results, by moving the pulling clamper 23 to an arbitrary position in the X direction and using it for gripping, even if the plate material W has a notch or the size of the plate material W is small, it is ensured. You can re-grab. Thereby, appropriate bending can be performed.

It should be noted that the present invention is not limited to the above-described embodiment of the present invention, but by making appropriate changes,
It can be implemented in other aspects. That is, FIG.
As shown in (1), it can be used for changing the manipulator clamper 8 to another narrow work clamper 35.

[0029]

As described above, according to the plate material bending method according to the first aspect of the present invention, when the plate material is bent, the plate material is clamped by the manipulator and carried in.
When using the pulling clamp unit to change the plate with the manipulator, the plate is clamped by moving the pulling clamp unit in the direction perpendicular to the direction in which the plate is loaded. Even in the case of a small size, it can be securely clamped, and the plate material can be replaced.

In the plate material bending apparatus according to the second aspect of the present invention, when bending the plate material, the plate material is clamped by the manipulator and carried in, and when the plate material is grasped by the manipulator using the pulling clamp unit, The pulling clamp unit is moved in the direction perpendicular to the loading direction of the plate material to clamp the plate material, so even if the plate material has a notch or the size of the plate material is small, it can be securely clamped, and the plate material can be gripped. It can be carried out.

In the plate bending apparatus according to the third aspect of the present invention, the pulling clamp unit rises above the front table only when positioning the plate and when changing the plate by the manipulator, so that it does not interfere with the processing.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire plate bending apparatus according to the present invention.

FIG. 2 is an enlarged view of a pulling clamp unit.

FIG. 3 is a detailed view of a manipulator clamper.

FIG. 4 is a side view showing a state in which the manipulator clamper is replaced with a narrow plate material clamper.

FIG. 5 is a cross-sectional view showing a gripping operation performed by a conventional plate bending apparatus.

FIG. 6 is a perspective view showing a case where a clamper for gripping is provided on a front table of the bending machine.

FIG. 7 is a cross-sectional view showing a problem in a gripping operation of the plate material shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bending apparatus 3 Bender (bending machine) 5 Front table 7 Manipulator 11 Pulling clamp unit 23 Pulling clamper 29 Lifting cylinder W Plate material

Claims (3)

[Claims] 1. A plate material clamped by a manipulator provided in front of a bending machine is carried into the bending machine, and prior to bending, a bending machine is mounted on a front table provided in front of the bending machine. In the bending method of a plate material, which performs bending after positioning the plate material by a pulling clamp unit movably provided in a direction orthogonal to the loading direction to the plate material, the manipulator uses the pulling clamp unit to perform plate bending. And bending the sheet into the bending machine. 2. A manipulator provided to carry a plate material into a bending machine, and a pulling device movably provided in a direction perpendicular to the carrying direction to position the plate material carried by the manipulator prior to the bending process. A plate bending apparatus, comprising: a clamp unit, wherein the manipulator uses the pulling clamp unit to re-grip the plate when the plate is carried in. 3. The plate material bending apparatus according to claim 2, wherein the origin setting clamper is movable in and out of a front table for loading the plate material and is movable in a loading direction with respect to the bending machine.