JPH0221893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a work discharge device for a press brake that automatically discharges a work processed by an upper die and a lower die of a press brake.

Conventionally, the workpiece that was bent using a press brake was removed (discharged) from the processing position by the operator.
This caused trouble for the workers as they were transferred to the next process.

On the other hand, when the workpiece is pressed by the press brake, one side of the workpiece is lifted off the pedestal, and after the press is released, the workpiece falls onto the pedestal. On this occasion,
In addition to generating noise, there is a risk that the workpiece may be deformed, so a support device that receives the workpiece by following the lifting of the workpiece during pressing has been considered. However, since such a support device merely receives the work, it is not possible to eliminate the work to be carried out by the operator.

This invention was made by focusing on such conventional problems, and by the cooperation of the upper die and the lower die of the press brake, a bent part is formed on the workpiece and one side piece is used to receive the workpiece. In a press brake work ejection device that transports the workpiece from the processing position to a conveyance means at the workpiece ejection position after it has been lifted from the table, a guide member extending from the processing position to the workpiece ejection position is provided on the upper mold side. , to the guide member,
A workpiece adsorption member that adsorbs the workpiece at the processing position and detaches the workpiece at the workpiece discharge position is slidably provided, a drive member that slides the workpiece adsorption member on the guide member, and further, the workpiece adsorption member has an upper suction part and a lower suction part that suction one side piece of the workpiece that rises and becomes oblique during processing, and the upper and lower suction parts suction one side piece that is tilted. The lower suction part is arranged in an oblique positional relationship according to the inclination angle of the one side piece, and the lower suction part is set to release the work earlier than the upper suction part, and further, The adsorption force of the upper adsorption part when the lower adsorption part is released is set to a force that allows the workpiece to rotate around the upper adsorption part and maintain the lower end of the workpiece on the conveyance means. By providing a discharge device, the purpose is to eliminate the workpiece discharge process by the worker, prevent noise and deformation of the workpiece at the processing position and discharge position, and further enable the workpiece to be discharged to an appropriate position. There is.

The present invention will be explained below based on the drawings.

1 to 3 are diagrams showing one embodiment of the present invention.

First, the configuration will be explained. The press brake 1 has an upper mold 3 and a lower mold 4 for bending a work 2. The upper die 3 has a press brake body 4. The upper die 3 is fixed to the press brake body 5,
The lower mold 4 is fixed to a lower mold support 6 which is vertically movable by a mechanism not shown, and can move toward and away from the upper mold 3. A workpiece pedestal 7 is attached to the lower mold support 6 and forms a horizontal plane that is substantially the same as the upper surface of the lower mold 4 . As an example of a conveying means for conveying the workpiece 2 bent by the press brake 1, a roller conveyor 8 is provided with one end located near the press brake 1 as shown in FIG. It is provided at an angle as shown by the middle two-dot chain line.

A guide rail 9, which is a guide member, is attached to the support member 5a on the upper die 3 side of the press brake main body 5, and passes through the bending position of the work 2 to one end of the roller conveyor 8 (work discharge position).
It extends to A workpiece adsorption member 10 is slidably provided on the guide rail 9 to adsorb the workpiece 2 at the bending position and detach it at the workpiece discharge position. This workpiece suction member 10 has a suction section main body 1 slidably attached to a guide rail 9.
0a, and three magnets 10 which are the suction parts attached to predetermined positions of the suction part main body 10a.
It consists of b, 10b, and 10c. This suction part may be a vacuum pad. The magnets 10b and 10c are used to attract one side piece 2a of the workpiece 2 that has been lifted from the workpiece pedestal 7 after being pressed, and as shown in FIGS. They are arranged in an oblique positional relationship in accordance with the inclination angle of 2a. The lower magnet 10c as the lower suction section is connected to the upper magnet 10c as the upper suction section at the workpiece discharge position.
In addition to leaving work 2 earlier than b,
The attraction force of the upper magnet 10b when the lower magnet 10c is released is the same as that of the upper magnet 10b.
The workpiece 2 rotates around the roller conveyor 8, and the lower end of the workpiece 2 is controlled by a device (not shown) to maintain a state in which it is placed on the roller conveyor 8. A cylinder 11 that can slide the workpiece suction member 10 on the guide rail 9 between a bending position and a workpiece discharge position at a predetermined time is connected to a device not shown.

Next, the action will be explained. To bend a workpiece 2 with the press brake 1, the workpiece 2 is first placed on the upper surface of the lower die 4 at a predetermined position on the workpiece pedestal 7. Next, the lower mold support stand 6 is raised as shown by the arrow A in FIG. , 10c, the workpiece 2 is suctioned and held by the workpiece suction member 10 as shown in FIG. Therefore, generation of noise and deformation of the workpiece 2 are prevented. Thereafter, the workpiece adsorption member 10 is moved to the guide rail 9 by the cylinder 11.
The upper part is slid to the right in FIGS. 1 and 3, and the workpiece 2 is transported from the bending position to the workpiece discharge position. At this position, when the attraction of the lower magnet 10c is released, the workpiece 2 rotates around the upper magnets 10b, 10b which still have the attraction force, and the lower end of the workpiece 2 rotates around the rollers as shown by the two-dot chain line B in FIG. Placed on conveyor 8. Next, the attraction of the upper magnets 10b, 10b is released, and the workpiece is completely separated from the workpiece attraction member 10 and discharged. The workpiece 2 rotates quietly around the lower end of the roller conveyor, is completely placed on a predetermined position on the roller conveyor 8, and is conveyed to the next process, as shown by the two-dot chain line C in FIG. Therefore, generation of noise and deformation of the workpiece 2 are prevented even at the discharge position, and the workpiece 2 can be placed at a predetermined position. On the other hand, the workpiece suction member 10 is returned from the workpiece discharge position to the bending position by the cylinder 11 in preparation for the next process.

As explained above, according to this invention,
A guide member extending from a processing position to a work discharge position is provided on the upper die side of the press brake, and a work adsorption member is slidably provided on the guide member to adsorb the work at the processing position and detach the work at the work discharge position.
A drive member is provided to slide this workpiece adsorption member on a guide member, and the workpiece adsorption member has an upper adsorption part and a lower adsorption part that adsorbs one side of the workpiece that floats up during machining and becomes oblique. and has a
The upper and lower adsorption parts are arranged in an oblique positional relationship according to the inclination angle of the one side piece so as to adsorb the inclined one side piece. The setting is made so that the workpiece is released at the appropriate time, and when the lower suction part is released, the suction force of the upper suction part is such that the workpiece rotates around the upper suction part and the lower end of the workpiece gets on the conveyance means. Since the work ejecting device uses a press brake that is set to a force that maintains the state, it can appropriately respond to the behavior of one side of the work that lifts up from the workpiece pedestal at the processing position, and this one side piece can be adsorbed. Since one side piece does not fall onto the workpiece pedestal, noise generation and deformation of the workpiece due to falling onto the workpiece pedestal at the processing position can be prevented.

In addition, noise and deformation of the workpiece can be prevented when the workpiece is discharged to the conveyance means at the discharge position, and the workpiece can be placed at a predetermined position on the conveyance means, so that the discharge operation can be performed reliably.

[Brief explanation of drawings]

FIG. 1 is a front view of a press brake equipped with a work discharge device according to an embodiment of the present invention, and FIG.
1 is a side view of FIG. 1, and FIG. 3 is a plan view of the workpiece discharging device of FIG. 1 equipped with a roller conveyor. 1...Press brake, 2...Work, 3...
Upper die, 4... Lower die, 9... Guide rail (guiding member), 10... Work adsorption member, 10b... Upper magnet (upper adsorption part), 10c... Lower magnet (lower adsorption part), 11... Cylinder (driving member).

Claims (1)

[Claims] 1. After a bent part is formed in the workpiece and one side piece is lifted from the workpiece pedestal by cooperation of the upper die and the lower die of the press brake, the workpiece is processed according to the process. In the work ejecting device of a press brake, the workpiece is transported from the workpiece ejecting position to the transporting means at the workpiece ejecting position. A workpiece adsorption member for removing the workpiece at a workpiece discharge position is slidably provided, a drive member is provided for sliding the workpiece adsorption member on the guide member, and the workpiece adsorption member is configured to prevent floating during machining. It has an upper suction part and a lower suction part that suction one side piece of the workpiece that is tilted.
The upper and lower suction parts are arranged in an oblique positional relationship according to the inclination angle of the one side piece so as to suction the one side piece that is inclined, and the lower suction part is attached to the upper suction part. Furthermore, when the lower suction section is released, the suction force of the upper suction section is such that the work rotates around the upper suction section and the lower end of the workpiece is A work discharge device for a press brake, characterized in that the force is set to maintain a state in which the work is placed on a conveyance means.