Rotary press die

Abstract

The objective of the present invention is to provide a rotary press die with which it is possible to set a center of rotation of a rotary die with high accuracy. The rotary press die is provided witha rotary die for forming a negative angle portion in a plate-shaped workpiece, and a fixed die which is disposed outside the rotary die to form a molded portion other than the negative angle portion in the workpiece, wherein the rotary die is a press molding die which pivots about a pivot axis Or when the workpiece is to be removed, and which is formed to be capable of being retracted toward the inside of the fixed die. A pivot block holding the rotary die in such a way as to be capable of pivoting about the pivot axis Or is provided between a fixed base on which the rotary die is placed, andthe rotary die, and the pivot block consists of a fixed piece which is disposed on the fixed base and which is provided with a concave sliding surface centered at the pivot axis Or, and a movable piece which is disposed in the rotary die, and which is provided with a convex sliding surface capable of sliding about the pivot axis Or along the concave sliding surface, wherein the concave sliding surface and the convex sliding surface have an opening angle from the pivot axis Or at least equal to 80 degrees and at most equal to 100 degrees.

Description

technical field [0001] The present invention relates to a rotary punching die, which punches a plate-shaped work plate by rotating a cam to form a negative corner. Background technique [0002] A conventional rotary press die is a cylindrical rotary cam having a cylindrical rotating body. This type of rotary stamping die is widely used because it can form negative corners at the ends of body panels. [0003] The cylindrical rotary cam is generally a cylindrical member made of cast iron, and is rotated by forming a cylindrical groove in a cast iron casing. A negative corner is formed by pressing on the working plate between a part of the cylindrical rotating cam and another die, and the processed working plate can be easily removed by rotating the cylindrical rotating cam and moving to the housing. [0004] However, such a cylindrical rotary cam made of cast iron has a problem that processing is difficult at the time of manufacture. In particular, the large cylindrical rot...

AI Technical Summary

Problems solved by technology

However, since there is no place for adjustment of this rotary punching die, it is almost impossible to correct it except for grinding the cylindrical rotary cam and the cylindrical groove.

[0008] In addition, rotary press dies using cylindrical rotary cams have problems such as difficulty in forming complex shapes with diameter changes other than cylindrical ones, and many steps required to form oil grooves for lubrication.

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