JPH04100642A - Press die - Google Patents

Abstract

PURPOSE:To prevent the generation of dents and flaws by the lifting of a blanking slug by providing an air blow-out mechanism or ejector pin mechanism into a press punch. CONSTITUTION:An air blow-out port 6 is provided into the press punch 1 to which the compressed air piping of the press die is connected and the air is blown out to forcibly drop the blanking slug 5 at the point of the time of blanking a work 3 which is a metallic material. The generation of the dents and flaws by the lifting of the slug is prevented in this way. The ejector pin 7 in the punch 1 interlocked to, for example, a mechanism for vertically moving the die is ejected simultaneously with the arrival of the press punch 1 at the bottom dead point, by which the blanking slug 5 is forcibly dropped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a precision machining nibless mold, and more particularly to a press mold having a function of forcibly removing punching debris and preventing dents and scratches.

[Conventional technology]

Conventionally, this type of press mold has a press punch 1, as shown in FIGS. 3(a) and 3(b). It consists of a stripper 2 and a goose set 4, and has a structure in which a pressed object 3 sandwiched between the stripper 2 and the goose set 4 is punched out by repeating vertical stroke motion.

[Problem to be solved by the invention]

The conventional press die described above does not have a function to prevent punching debris from lifting up, and as the number of punches increases, the tip of the punch wears out, the press burr of the pressed object becomes large, and the pressed object is punched twice. The material remains attached to the press punch when it enters the next stroke motion, and the workpiece that was adhered to the press punch falls onto the workpiece that has not yet been punched.
A dent.

It has the disadvantage of causing scratches. The cross-sectional view in Figure 3(c) shows the above situation, and if punched in this state, it will not only have a negative effect on the press punch, but also prevent the object to be pressed into the desired shape. It will be necessary to stop and make major adjustments.

The press die of the present invention differs from the above-mentioned conventional press die in that it has a function to prevent punching dregs from being lifted up, thereby completely eliminating defects such as dents and scratches.

[Means to solve the problem]

The press die of the present invention has an air outlet or a release mechanism that allows an ejector to come out to prevent punching debris from adhering to the tip of the press punch.

[Actual example]

Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a) and 1(b) are cross-sectional views showing the steps of Example 1 of the present invention. In this mold, an air outlet 6 is provided in a press punch 1 to which a compressed air piping is connected, and air is blown out when a metal material to be pressed 3 is punched, thereby removing punching debris 5. Since it has a mechanism that forces it to fall, it is possible to prevent dents and scratches caused by lifting of crumbs.

FIGS. 2(a) and 2(b) are cross-sectional views showing the steps of Example 2 of the present invention. In this embodiment, at the same time that the press punch 1 reaches the bottom dead center, the ejector bottle 7 in the press punch 1, which is linked to a mold vertical mechanism, protrudes, and a mechanism is established to forcibly drop the punching scraps. Because it has
It can prevent dents and scratches caused by lifting of crumbs.

〔Effect of the invention〕

As explained above, the present invention has an air blowing mechanism or an ejecting pin mechanism in the press punch to prevent dents caused by lifting of punching scraps.

It has the effect of preventing scratches.

[Brief explanation of the drawing]

1(a) and (b) are cross-sectional views showing the steps of Example 1 of the present invention, FIGS. 2(a) and (b) are cross-sectional views showing the steps of Example 2 of the present invention, and FIG. Figure (a). (b) is a cross-sectional view showing the conventional mold process, and Figure 3 (c)
is a sectional view illustrating the conventional drawbacks. 1...Press punch, 2...Stripper, 3...
- loincloth pressed product, 4... die set, 5... punching residue, 6... air outlet, 7... ejection bottle.

Claims (1)

[Claims] 1. A press mold, characterized in that the press punch is provided with a release mechanism for preventing punching debris from adhering to the press punch during punching of an object to be pressed.