Compression die

Abstract

The invention discloses a compression die. The compression die is mainly composed of an upper die body and a lower die body, wherein the upper die body comprises an upper die plate 1, an upper base plate 2, an upper fixing plate 3, a male die seat 4, a first male die 5, hanging rings 15, a second male die 16 and the like; and the lower die body comprises an upper sleeve 6, a first prestress ring 7, a first female die 8, a lower sleeve 9, a first supporting barrel 10, an annular plate 11, a lower base plate 12, a lower die plate 13, an ejector rod 14, an upper pressing ring 17, upper cushion blocks 18, pull rods 19, a second female die 20, a second prestress ring 21, a lower pressing ring 22, lower cushion blocks 23, a second supporting barrel 24, a transition rod 25, ejector blocks 26, a cover plate 27, rolling sector rings 28 and the like. By means of the compression die, the problems that shape changing, difficult unloading and folding are caused by the compression reverse acting force can be solved, and the compression die can be applied to forming of a blind hole member which is locally wall-thickened.

Description

technical field

[0001] The invention relates to a pressing die. Background technique

[0002] Blind hole components with local thick walls are generally used such as Figure 1a The forming method of positive extrusion upsetting. In this method, the punch is an integral structure. After the punch and the blank start to contact, the metal at the head flows faster than the metal at the bottom. When the downward position of the punch reaches At the step position of the die, the metal in the thick-walled part of the billet will flow upwards and leave the step of the die. As the punch continues to descend, when the metal in the thick-walled part of the billet contacts the stepped surface of the punch, the metal in the thick-walled part will start to flow back down again. , it is easy to produce defects such as folding at the stepped part in contact with the die, and it is very difficult to unload the billet from the slender rod of the punch after the extrusion is completed. [00...

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