JPH08117864A - Automatic plate bending machine - Google Patents

Abstract

PURPOSE: To provide an automatic plate bending machine, in which positioning of a work can be executed without clamping or sucking the work and the automatic bending work can continuously be executed. CONSTITUTION: In the plate bending machine, a front table A providing a pushing means for pushing the work W against a back gage 13 side and a back table B providing the back gage 13 for deciding the position of the work W are arranged at the front and the back sides of a frame 1 interposing the working position of the work W. Further, in the plate bending machine, the front table A providing a front gage 11 for deciding the position of the work W and the pushing means for pushing the work W against the back gage 13 side and the back table B providing the back gage 13 for deciding the position of the work W, a pushing means for pushing the work W against the front gage 11 side are arranged at the front and the back sides of a frame 1 interposing the working position of the work W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate bending machine such as a press brake, which is capable of automatic processing without clamping or adsorbing a work. is there.

[0002]

2. Description of the Related Art Conventionally, when automatically bending a work,
A method of bending a work by clamping it with a robot hand, or bending a work with the robot hand adsorbed to the robot hand, and using a dedicated clamp mechanism corresponding to the dedicated work There is a way.

In the method of clamping and bending a work, the work is bent when the work is clamped. However, the influence of the work is accurate at the time of program creation. Because it is impossible to predict,
If the work has holes or notches, it is necessary to devise to avoid those parts.

On the other hand, in the method of bending the work by adsorbing the work to the robot hand, a device for generating the suction force is required, and when the suction force becomes weak, the work falls and the danger is caused. There is no fear that they will be invited. Further, the method using the exclusive clamp mechanism has a problem that the processing cost must be increased because the exclusive clamp mechanism has to be manufactured.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention is capable of positioning the work without clamping or adsorbing the work, and continuously and automatically bends the work. It is an object of the present invention to provide an automatic plate bending machine capable of performing the above.

[0006]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above problems, and the structure of the first invention is to push a work toward a back gauge side in a plate bending machine. A front table equipped with a pressing means for hitting, and a back table equipped with a back gage for determining the position of the work are arranged before and after the frame while sandwiching the working position of the work. It is a feature, and also
According to a second aspect of the present invention, in a plate bending machine, a front table having a front gage for determining the position of the work and a pressing means for pressing the work to the back gage side, and a work of the work. A back gage for determining the position and a back table having a pressing means for pressing the work to the front gage side are arranged before and after the frame with the working position of the work interposed. It is what

[0007]

That is, according to the present invention, in the plate bending machine, the front table is movable up and down and back and forth by sandwiching the work position of the work.
And a back table, and the front table is provided with a pressing device for pressing the work against the back gage side, or is provided with the pressing device and determines the position of the work. On the other hand, the back table is equipped with a back gauge for determining the position of the work, or with the back gauge,
Since a pressing device that presses the work against the front gage side is provided, it is possible to position the work without clamping or adsorbing the work with the robot hand. Not only work, but also work with holes and notches can be automatically processed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of implementing the present invention will be described with reference to the drawings. 1 is a side view of an example of a press brake to which the present invention is applied, FIG. 2 is a front view of a work which is automatically bent by the press brake of FIG. 1, and FIGS. 3 to 31 are the work of FIG. It is a figure explaining the bending process of.

In FIG. 1, 1 is a frame, 2 is a ram,
3 is an upper mold attached to the lower end of the ram 2 via a holder 4, 5 is a lower table, 6 is a lower mold attached to the lower table 5 via a holder 7, and 8 is a frame. Upper die automatic changer provided on both left and right sides of the frame 1, 9 is a lower die stocker formed on the bottom 10 of the frame portion of the frame 1, and A is a front table provided at the front of the frame 1. , B are also back tables arranged in the rear part, and in the illustrated example, both the front table A and the back table B are vertically movable and back and forth movable by a feed screw mechanism, a hydraulic cylinder and the like. In the present invention, it is sufficient that the tables A and B have a function of either vertical movement or longitudinal movement. Further, depending on the work and processing contents, the tables A and B may not require any function of vertical movement or forward / backward movement, so the bending machine of the present invention has such a processing. Machines are also included.

Reference numeral 11 is a front gauge provided on the front table A, and 12 is a work which is arranged on the front gauge 11 and which pushes forward and backward freely movable work W toward the back table side. A pressing device, 13 is a back gage provided on the back table B, and 14 is a work pressing device which is arranged on the back gage 13 and which can move forward and backward.

The front gauge 11 and the back gauge 13 are for determining the position of the work W.
If the work W located on the front table A is pressed by the pressing device 12 and its tip end is pressed against the preset back gauge 13, the work W is positioned, and similarly. And the work located on the back table B
The work W is positioned when the work W is pressed by the pressing device 14 and the tip of the work W is pressed against the preset front gauge 11.

The above device is an example of the second invention. In the first invention, although not shown, the front tape is used.
The front gage 11 is not installed on the bull A, and the back
Bull B is not provided with the pressing device 14. This is because there is no particular need for performing a relatively simple bending process, and when performing a complicated bending process, for example, when bending the work W as shown in FIG. 2, the device of the second invention is used. I have to ask.

Then, the process of bending the work W into the shape shown in FIG. 2 will be described with reference to FIGS. 3 to 31.
2 to 31, N1 to N7 represent bending process numbers, and (a), (b), (d), (f), and (h) represent molds to be used.

3 to 5 show the N1 process.
Is a state in which the work W is placed on the front table A, and the rear end side of the work W is pressed against the back gauge 13 by the pressing device 12 to be positioned. FIG. FIG. 5 shows a step-pressed state using (a), and FIG. 5 shows a state in which the N1 process is completed and the work W is supported on the front table A.

FIG. 6 shows a state in which the work W is retracted and retracted together with the table A from the state of FIG. 5, and the mold is exchanged from (a) to (b). 7 to 9 show the N2 step. In FIG. 7, the table A is slightly raised and the table B is slightly lowered from the state of FIG. 6 to press the work W.
After being pressed by 12 and transferred to the table B, the front end side of the work W is pressed against the front gauge 11 by the pressing device 14 and positioned, and FIG. 8 shows the mold (b) in the above state. FIG. 9 shows a state in which the work W is step-pressed and the work W is supported by the back table B after the N2 process is completed.

FIG. 10 shows a state in which the work W is retracted and retracted together with the table B from the state of FIG. 9, and the mold is exchanged from (b) to (f). 11 to 13 show the N3 process, and FIG. 11 shows that the table B is lowered to the height of the mold and the work W is pressed by the pressing device 14 to be pressed against the front gauge 11. 12 and FIG. 12 shows a state in which the back table B is lowered and reverse bending is performed using the mold (f). In FIG. 13, the N3 process is completed and the work W is the table B.
Shows the state of being supported by.

14 to 16 show the N4 process.
14 shows a state in which the front end side bent end portion of the work W is abutted against the front gauge 11 by the pressing device 14 from the state shown in FIG. 13, and FIG. 15 shows the mold (while the back table B is being lowered). f) reverse bending process, Fig. 16 shows N
The state in which the four steps are completed and the table B is raised to support the work W on the table B is shown.

FIG. 17 shows a state in which the table B is slightly raised from the state of FIG. 16 and then retracted to retract the work W, and the mold is exchanged from (f) to (d). . Also, FIG.
FIG. 20 shows the N5 step. In FIG. 18, the table B is moved forward and then lowered slightly, and the work W is pressed by the pressing device 14.
19 shows a state in which the tip side bent portion is abutted against the front gauge 11 for positioning, FIG. 19 shows a state where the die (d) is used for bending, and FIG. 20 shows a state where the bending is completed and the table B is raised. The work is supported by the table B.

In FIG. 21, the work W is moved from the table B to the table A by the pressing device 14 from the state of FIG. 20 and retracted to the processing position, while the mold is changed from (d) to (f). Shows the exchanged state. 22 to 24 show the N6 step. FIG. 22 shows a state in which the table B is slightly raised and then moved forward to bring the back gauge 13 into contact with the work W for positioning. 23 is a state in which the table A is lowered while being reverse-bent using the mold (f). In FIG. 24, the N6 step is completed and the table A is raised to work W on the table A. Shows the state of supporting.

In FIG. 25, the work W is tested from the state of FIG.
It shows a state in which the bull A is retracted and retracted, and the mold is exchanged from (f) to (h). 26 to 28 show the N7 process. FIG. 26 shows a state in which the rear end side bent portion of the work W is abutted against the back gauge 13 by the pressing device 12 and positioned, and FIG. In a state where the table A is reversely bent using the mold (h) while being lowered, FIG. 28 shows that the table A is finished and the table A is raised to support the work W. Shows the state.

After the above, the predetermined bending process is completed, and the work is finished.
The KU W is moved to the carry-out position.
FIG. 1 shows the process. FIG. 29 shows a state in which the table B is lowered and the work W is moved to the table B by the pressing device 12, and FIG. FIG. 31 shows the state where the KU W is carried out and positioned, and FIG.

The automatic bending machine according to the present invention is capable of performing the complicated bending work as described above on the tables A and B and the devices provided on the tables A and B, and the automatic die changer although the description is omitted. By the control such as NC control, the work W can be continuously performed without being clamped or adsorbed by the robot hand. When exchanging the mold, the upper mold is replaced by the automatic changing device 8 and the lower mold is replaced by the automatic replacing device (not shown). To do.

[0023]

Since the present invention is as described above, even a work which has been conventionally difficult to clamp because it cannot be clamped due to the problem of the shape of the hole, the position of the hole, or the position of the cutout, etc. is automatically processed. Since it is possible to create a program without considering the influence of work deflection,
This is a major contribution to improving the efficiency of plate bending.

[Brief description of drawings]

FIG. 1 is a side view of an example of a press brake to which the present invention is applied.

FIG. 2 is a front view of a work which is automatically bent by the press brake of FIG.

FIG. 3 is an explanatory view of a positioning state in the first bending process of the work.

FIG. 4 is an explanatory view of a bending state in the first bending step of the work.

FIG. 5 is an explanatory view of a bending completed state in the first bending process of the work.

FIG. 6 is an explanatory diagram of a state during die replacement.

FIG. 7 is an explanatory view of a positioning state in the second bending process of the work.

FIG. 8 is an explanatory view of a bending state in the second bending step of the work.

FIG. 9 is an explanatory diagram of a bending completed state in the second bending process of the work.

FIG. 10 is an explanatory diagram of a state during die replacement.

FIG. 11 is an explanatory view of a positioning state in the third bending process of the work.

FIG. 12 is an explanatory view of a bending state in the third bending step of the work.

FIG. 13 is an explanatory diagram of a bending completed state in the third bending process of the work.

FIG. 14 is an explanatory view of a positioning state in the fourth bending process of the work.

FIG. 15 is an explanatory view of a bending state in the fourth bending step of the work.

FIG. 16 is an explanatory diagram of a bending completed state in the fourth bending process of the work.

FIG. 17 is an explanatory diagram of a state during die replacement.

FIG. 18 is an explanatory view of a positioning state in the fifth bending process of the work.

FIG. 19 is an explanatory view of a bending state in the fifth bending step of the work.

FIG. 20 is an explanatory diagram of a bending completed state in the fifth bending step of the work.

FIG. 21 is an explanatory diagram of a state during die replacement.

FIG. 22 is an explanatory view of a positioning state in the sixth bending process of the work.

FIG. 23 is an explanatory view of a bending state in the sixth bending step of the work.

FIG. 24 is an explanatory view of a bending completed state in the sixth bending process of the work.

FIG. 25 is an explanatory diagram of a state during die replacement.

FIG. 26 is an explanatory view of a positioning state in the seventh bending process of the work.

FIG. 27 is an explanatory diagram of a bending state in the seventh bending step of the work.

FIG. 28 is an explanatory diagram of a bending completed state in the seventh bending process of the work.

FIG. 29 is an explanatory view of a carrying-out preparation process for a bent work.

FIG. 30 is an explanatory diagram of a carry-out positioning process.

FIG. 31 is an explanatory diagram of a state of moving to a carry-out position.

[Explanation of symbols]

 1 Frame 2 Ram 3 Upper mold 4 Upper mold holder 5 Lower table 6 Lower mold 7 Lower mold holder 8 Upper mold changing device 9 Lower mold stocker A Front table B Back table Bull 11 Front gage 12 Work pressing device 13 Back gage 14 Work pressing device

Claims (4)

[Claims] 1. A plate bending machine equipped with a pressing means for pressing a work against a back gauge side.
And a back table having a back gage for determining the position of the work are arranged before and after the frame with the working position of the work sandwiched therebetween. . 2. In a plate bending machine, the front table is provided with a front gage for determining the position of the work and a pressing means for pressing the work against the back gage, and the position of the work. A back gauge having a pressing means for pressing the back gauge and the work to be determined to the front gauge side.
An automatic plate bending machine, in which bulls are placed before and after the frame with the work position sandwiched. 3. The front table and the back table are
The automatic plate bending machine according to claim 1 or 2, wherein the automatic plate bending machine is formed so as to be movable up and down or movable back and forth. 4. The front table and the back table are
The automatic plate bending machine according to claim 1 or 2, wherein the automatic plate bending machine is formed so as to be vertically movable and movable back and forth.