JPS61150729A - Press work method - Google Patents

Abstract

PURPOSE:To locate stably the body to be worked and to perform the press work with good efficiency by pressing the body to be worked by a pressing pin with the pressure of the air which is passed from the behind of the pressing pin. CONSTITUTION:The pin 6 to press the body to be worked which is movable vertically is fitted on the center part of a punch part, the opening hole 11 penetrating from the side part is connected to the space part 10 of the upper part of this pressing pin 6 and the air is fed from the outer part into this opening hole 11. The pressure onto the pressing pin 6 becomes constant at all times by the air pressure passed from the behind to press the body 5 to be worked. A stabilized positioning is thus enabled and the generation of dies damages, etc. due to the dislocation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a press working method, and particularly to a transfer feeding method.

[Technical background of the invention and its problems]

As shown in FIG. 2, when a long plate-like object is transferred and fed as a workpiece in a press working method, a die (
2) and the punch held in the punch holder (3) (
The plate-shaped body (5) to be processed is transported between the presser pin (6) and the presser pin (6) that is attached to the punch.
) comes into contact with the plate-shaped body (5) K, positions the plate-shaped body, and the punch (4) descends further to perform the prescribed processing on the plate-shaped body, and the press work is continued in this manner. , the plate-like bodies are transported one after another.

At this time, the workpiece holding pin (6) attached to the punch (4) is pressed by a spring (7) disposed in the opening of the punch holder above the pin (6).

Therefore, when the punch descends, the presser pin also descends, and after it comes into contact with the surface of the workpiece, the pressure exerted by the spring gradually increases. Damage to things or
In addition, deformation may occur. Furthermore, when the workpiece has a certain direction or an irregular shape, the presser pin rotates, which causes a problem in that the workpiece cannot be stably positioned. Sara K also had problems such as damage to the mold due to misalignment, and had the disadvantage that efficient press working was not possible.

[Purpose of the invention]

The present invention has been made in view of these points.
The purpose of the present invention is to provide a method in which a workpiece holding pin can stably position the workpiece during press processing such as transfer feed processing, thereby preventing any defects from occurring to the workpiece and allowing efficient press processing. That is.

[Summary of the invention]

A predetermined constant pressure is applied from behind to the workpiece holding pin provided on the punch side of the mold used in the press working of the present invention by air introduced from the outside into the opening formed in the punch part. In this method, press working is performed by operating the machine in the same state.

[Embodiments of the invention]

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

FIG. 1 is a schematic explanatory diagram of a mold used for press working of the present invention. A die (2) is held on a die holder (1) in the lower part of the mold, a punch (4) is held in a punch holder (8) in the upper part, and a cover that can move up and down is placed in the center of the punch part. A workpiece holding pin (6) is attached.

An opening (111) penetrating from the side is connected to the space α1 above this presser pin (6), and this opening α1) Ic
Air is introduced from outside.

When performing transfer feed machining work using such a mold, the pressure on the presser pin (6) attached to the punch side is equal to The air pressure is also adjusted in the space, and the pressure of the air flowing in from behind keeps it constant and presses the workpiece.

In the method described above, the pressure is always maintained at 1.2 Kq/cry" and good pressing can be performed. In this way, the plate-shaped body (5) to be processed is pressed as specified.
The air regulator allows the pressure to be adjusted to suit each press side work, and also allows for fine adjustments.

〔Effect of the invention〕

As described above, according to the method of the present invention, the pressure on the workpiece holding pin provided on the punch side of the upper die causes the lowering of the upper die.
It remains constant regardless of the rise.

Good positioning of the workpiece is possible, there is no scratching or deformation of the workpiece, and the presser pin can rotate even when working with directional workpieces or irregularly shaped workpieces. This allows for stable positioning, which eliminates various problems such as mold breakage due to misalignment, and enables efficient and good press working.

Furthermore, since the pressure on the presser pin is air-based, it can be easily changed to the desired value, and fine adjustments can be made.
Enables efficient press work.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view schematically showing a mold used for press working of the present invention, and FIG. 2 is a cross-sectional view schematically showing a conventional mold. l...Die holder, 2...Die, 4...Punch, 8
...Punch holder, 6. Workpiece holding pin, 11.
- Opening hole provided in the punch holder. Agent Patent Attorney Inoue - Male Figure 1 Figure 2

Claims (2)

[Claims] (1) In press forming using a die and punch, when a workpiece is held down by a presser pin provided on the punch side, the presser pin presses the workpiece by the pressure of air flowing in from behind the presser pin. A press processing method characterized by: (2) The press working method according to claim 1, wherein the punch side has a relief for adjusting air pressure.