JPH09155469A - Punching device of press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a punch from being broken or a hole from being deformed, to surely keep the precision of the positioning hole and to improve the precision of cutting with laser by providing a stopper for an arm to stop at the bottom dead center of the upper die. SOLUTION: An arm 9 is lowered together with an upper die 2 as one body at the same time of lowering of the upper die 2, a panel work is drawn and formed at the bottom dead center of the upper die 2, the arm 9 is engaged at a cavity part 13 with a stopper 5 and fixed. A cushion ring 3 is raised in the state of fixing the arm 9, and the upper die 2 is lifted up. A punch 15 is projected from a hole 16 of the upper die 2, it is fitted in the die 4 installed on the cushion ring 3 and positioning punching is executed on the panel work. After lowering of punching, the upper die 2 is raised to the top dead center. In this time, the arm 9 and the punch 15 are also raised together with the upper die 2, when the stopper 5 is escaped from the cavity part 13, a spring 8 is compressed and retreated and the engagement with the cavity part 13 installed on the arm 9 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-type punching device for drawing and punching a panel work.

[0002]

2. Description of the Related Art In a small-quantity production, a panel work is laser-cut after press-drawing, but since the panel work is positioned in the entire shape, a set variation occurs. In order to prevent the occurrence of this set variation, positioning holes are simultaneously processed during drawing.

In a conventional punching device, as shown in FIG. 4, a punch 20 is fixed to a lower die 1 by an axis line in the direction of the upper die 2, and a guide hole formed in a cushion ring 3 is penetrated to the upper die 2
In the structure, a die 21 corresponding to the punch 20 is provided, and a punching process is performed by lowering the upper die 1 and the cushion ring 3.

[0004]

In the above-mentioned conventional punching device, since punching is started before the bottom dead center of the upper die 2 (during molding), a load is applied to the punch 20, and the punch 20 is damaged or broken. Deformation occurs. Further, since the die 21 is present in the upper mold 2, the punching scrap remains on the upper mold 2 side, and there is a problem in the processing thereof, and improvement thereof has been a problem.

An object of the present invention is to provide a press-type punching device which eliminates breakage of the punch and deformation of the hole and facilitates processing of punching scrap.

[0006]

[Means for Solving the Problems] In order to achieve the above object, an arm mounted on an upper die in a rising direction by a spring so as to be movable up and down with a constant stroke, and a lower arm. A punch fixed integrally with the axis of the mold is provided, and a die corresponding to the punch is provided on a cushion ring that can be moved up and down in the lower mold, and the arm is locked at the bottom dead center of the upper mold. It is characterized in that it is provided with a stopper.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a lower mold and 2 is an upper mold. The lower die 1 is provided with a cushion ring 3 that can be moved up and down, a die 4 corresponding to a punch 15 described later, and a stopper that locks an arm 9 described later at the bottom dead center of the upper die 2. It is equipped with 5.

The stopper 5 has a holder 6 and a spring 8 attached thereto.
Is provided at the tip of the support member 7 which is always biased in the forward direction by the horizontal axis.

On the other hand, on the upper mold 2, a downward L-shaped arm 9 is attached to a bracket 10 via a shaft 11 through a long hole 12 so as to be able to move up and down with a constant stroke. The arm 9 is provided with a recess 13 with which the stopper 5 is engaged.

A punch 15 is integrally fixed to the arm by an axis line in the lower die direction.
Has its lower end fitted into a hole 16 formed in the upper mold 2, its upper end 15a fitted into a guide hole 17 formed in the upper mold 2, and the spring 15 always raises the punch 15 and the arm 9. Biased in the direction.

The operation of the present invention having the above configuration will be described. FIG. 1 is a top dead center state of the upper mold 2. In this state, the work panel W is set on the lower mold 1 and the upper mold 2 is lowered to draw the work panel W.

Simultaneously with the lowering of the upper die 2, the arm 9 descends integrally with the upper die 2, the panel work W is drawn at the bottom dead center of the upper die 2 shown in FIG.
3 is engaged and the arm 9 is fixed.

With the arm 9 fixed, as shown in FIG. 3, the cushion ring 3 rises to lift the upper mold 2. At this time, the holding stroke of the upper mold 2 is a stroke allowable amount by the shaft 11 to which the arm 9 is attached and the elongated hole 12, whereby the punch 15 is provided on the cushion ring 3 so as to project from the hole 16 of the upper mold 2. The panel work W is inserted into the existing die 4 and the positioning hole is punched in the panel work W.

After the lowering of the holes, the upper die 2 is raised to the top dead center. At this time, the arm 9 and the punch 15 also move up together with the upper mold 2, and when the stopper 5 escapes from the recess 13, it compresses the spring 8 and moves backward to engage with the recess 13 provided in the arm 9. To release.

As described above, at the bottom dead center of the upper mold 2, the panel work W is drawn and then the cushion ring 3 is lifted to lift the upper mold 2 so that the punch 15 projects from the hole 16 of the upper mold 2 and is punched. Since the lowering is performed, the punch 15 is not burdened before the bottom dead center of the upper mold 2 (during molding), and the punch 15 is prevented from being broken or the hole is deformed.

Further, since the die 4 is present on the lower die 1 side, it becomes easy to process the punching scrap.

[0017]

As described above, according to the present invention, breakage of the punch and deformation of the hole are prevented, the accuracy of the positioning hole can be ensured, and the accuracy of laser cutting is improved. In addition, since the hole is punched after drawing, the panel work does not move and can be set at an arbitrary position. Further, it has an advantage that processing of scraps for punching is facilitated and all the conventional problems are solved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a press die equipped with the device of the present invention (top dead center state)

FIG. 2 is a sectional view of a press die equipped with the device of the present invention (bottom dead center state)

FIG. 3 is a sectional view of a press die equipped with the device of the present invention (hole punching state)

FIG. 4 is a sectional view of a press die equipped with a conventional device.

[Explanation of symbols]

 1 Lower mold 2 Upper mold 3 Cushion ring 4 Dice 5 Stopper 9 Arm 12 Long hole 13 Recess 14 Spring 15 Punch

Claims (1)

[Claims] 1. An arm attached to an upper die in a rising direction by a spring so as to be able to move up and down with a constant stroke, and a punch integrally fixed to the arm by an axis line in the lower die direction. The lower die is provided with a die corresponding to the punch in a vertically movable cushion ring, and a stopper for locking the arm at the bottom dead center of the upper die is provided. apparatus.