JPH0235604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a press apparatus that performs a plurality of right angle bends, and more particularly to a press apparatus that has an improved bending position.

[Background of the invention]

Conventionally, a press machine has a dicing device for knocking out a workpiece. The dictation device has a mechanism in which when pushing up a bent or drawn work, the slide moves up and at the same time pushes the work up.

An example of this conventional method will be explained with reference to the drawings. 1st
When pressing the product 1 shown in the figure, which has a plurality of right angle bending points, the method shown in FIGS. 2 and 3 was used. That is, an upper mold consisting of a punch 4 attached to a punch holder 3, a cylinder 9 that laterally moves the die 5 and punch 8 attached to a die holder 7, and a knockout plate 6 that knocks out a workpiece from the die 5. , and a lower die consisting of a dictation pin 10;
These upper and lower molds are each fixed to a press machine with screws or the like. In such a press apparatus, when the work 2 is placed on the die 5 as shown in FIG. 2 and pressed, it becomes U-shaped as shown in FIG. 3. Next, when the punch 4 is raised, the knockout plate 6 is also raised, and at this position, the spacer 11 is inserted into the workpiece 2 from the direction perpendicular to the plane of the paper to hold the workpiece 2 on the knockout plate 6. By actuating the cylinder 9 and moving the punch 8 in the direction of the arrow, the end of the workpiece 2 is bent at a right angle to form the shape shown in FIG. However, since the workpiece 2 is placed on the knock-out plate 6, the spacer 11 is inserted and the punch 8 is used to bend the workpiece.
There was a drawback that the workpiece 2 was shifted and could not be processed accurately.

[Purpose of the invention]

An object of the present invention is to provide a press device that has a simple structure and can perform accurate multiple bending operations.

[Summary of the invention]

In order to achieve the above object, the present invention does not raise the knockout pin even if the punch rises after the processing shown in FIG. It was designed to do this.

[Summary of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. Note that the same reference numerals in the drawings as in FIGS. 1 to 3 indicate the same parts, and therefore, repeated explanations will be omitted. first,
The hydraulic circuit in FIG. 5 includes a cylinder 13, a pipe 1
4, a relief valve 15, a pilot check valve 16, solenoid valves 17, 18, a check valve 19, a tank 20, and a hydraulic power source 21. Next, to explain the operation, cylinder 1
When the cylinder rod 12 in the cylinder 3 moves in the direction of the arrow, pressure oil flows through the pipe 14 in the direction of the arrow A and flows from the relief valve 15 to the tank 20. At the same time, when the cylinder rod 12 moves in the direction of the arrow, the solenoid valve 17 is energized and the hydraulic power source 2
1, oil flows in the direction of arrow B and opens the pilot check valve 16. As a result, the pressure oil in the cylinder 13 flows in the direction of arrow C and enters the tank 20.
Therefore, the cylinder 13 remains in a pulled state.

Next, to raise the cylinder rod 12, when the solenoid valve 18 is energized, oil flows from the hydraulic source 21 in the direction of arrow D, passes through the check valve 19, enters the cylinder 13, and pushes the cylinder rod 12 upward.

This hydraulic system is incorporated into the press mold shown in FIG. 4, and is configured to push up the knockout plate 6 at any time.

In FIG. 4, the number of component parts is the same as the conventional one (FIGS. 2 and 3), but the arrangement of the parts is different. That is, the installation positions of the spacer 11 and the horizontally driven punch 8 are such that the workpiece 2 can be pressed between the dies 5 so that the upper surface of the spacer 11 is flush with the upper surface of the die 5. In addition, in the case of punch 8, the workpiece 2 is
The position that is raised by the thickness of the plate is the position that is driven horizontally.

By combining the hydraulic system and press mold as described above, even if the punch 4 rises after U-bending the work 2, the knockout plate 6 remains in that position, and the work 2 is held between the dies 5. is located on the knockout plate 6. In this state, insert the spacer 11 to press the workpiece 2 onto the knockout plate 6, and move the punch 8 horizontally using the cylinder 9. As shown in FIG. The part is bent at right angles. Thereafter, the punch 8 and the spacer 11 are returned to their original positions, and a command is given to the solenoid valve 18, which causes the knockout plate 6 to rise and the product 1 shown in FIG. 1 to come out of the die 5.

As described above, since the spacer insertion and bending can be performed while the workpiece is held in the die without significantly changing the structure, accurate multiple bending processes can be performed without shifting the workpiece 2.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a press device that can accurately perform multiple bending operations without complicating the structure.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a product with multiple bending points, Figs. 2 and 3 are sectional views showing main parts of a conventional press device, and Figs. 4 and 5 are presses according to the present invention. FIG. 2 is a sectional view and a hydraulic circuit diagram of the device. 1...Product, 4...Punch, 5...Die, 6...
... Knockout plate, 10 ... Diction pin, 11 ... Spacer, 12 ... Cylinder rod, 13 ... Cylinder.

Claims (1)

[Claims] 1. A vertical punch that constitutes the upper die and is driven in the vertical direction, a die that constitutes the lower die that faces this punch, and a notch that is driven by hydraulic pressure to knock out the workpiece that has entered the die outside the die. an out plate, a spacer that is driven in a horizontal direction to hold the U-shaped workpiece processed by the punch and die on the knockout plate, and the U-shaped workpiece held by the spacer. In a press device equipped with a horizontal punch that is driven in a horizontal direction to bend an end portion of A hydraulic circuit is provided to retain the knockout plate within the die even when the force is released, the spacer is positioned to retain the workpiece within the die, and the horizontal punch is positioned within the die. A press apparatus, characterized in that it is provided with a hydraulic circuit which is arranged at a position where the held workpiece is to be machined and which raises the knockout plate after the workpiece is machined by the horizontal punch.