Swing press for forging

Abstract

PROBLEM TO BE SOLVED: To provide a swing press for forging capable of significantly reducing molding load.SOLUTION: The swing press for forging comprises: an eccentric shaft 8 rotatably attached to a press frame 1; a con-rod 11 which is lifted up and down and is coupled to the eccentric shaft 8; and a bed 2 for mounting a lower die 36 thereon, the press serving as a swing guide for applying swing motion to the lifting motion of the con-rod 11. A lower surface of a top die 16 attached to the lower surface of the con-rod 11 is formed into a curve surface which becomes a salient downward, and the curve surface varies along a direction of the swing motion. Following to rotation of the eccentric shaft 8, the con-rod 11 is lifted up and down and swings by the swing guide, so that the top die 16 attached to the lower surface of the con-rod 11 also swings and the top die 16 gradually contacts and applies pressure to the lower die 36 from one end part to the other end part. The molding is partially performed from the one end part to the other end part of the top die 16, so applied pressure is small, and a drive source of small size may be used.

Description

technical field [0001] The invention relates to a swing punching machine for forging. More specifically, it relates to a new forging press machine of a type that swings a die when pressing or impacting a metal material with upper and lower dies to form an arbitrary shape. Background technique [0002] In a conventional forging mechanical press, as shown in Non-Patent Document 1, an eccentric shaft is rotatably attached to the upper part of the press frame, and the upper end of the connecting rod is attached to the eccentric shaft and the lower end is attached to the toggle pin. To connect with the slider, the rotary motion of the eccentric shaft given by the drive source is converted into the reciprocating motion of the slider. And, in order to satisfy the linearity of the reciprocating motion of the slider, the slider is guided by a guide rail attached to the frame. [0003] An upper mold is installed on the lower surface of the slider converted into reciprocating motion,...

AI Technical Summary

Problems solved by technology

[0010] However, in this prior art, the slider swings but the upper mold itself does not swing, and the upper mold descends to the bottom dead center in a parallel posture with respect to the lower mold and presses down.

[0011] Therefore, it is the same as conventional conventional mechanical presses in that pressure is applied to the entire surface of the die, and the problem of a large press load cannot be solved.

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