Cold extrusion device, and female die and male die thereof

Abstract

The invention discloses a cold extrusion device, and a female die and a male die thereof. The cold extrusion device comprises the female die and the male die, wherein the female die comprises a die seat; the die seat has a sleeve-shaped structure; the lower end of the inner pore of the die seat is provided with a lower guiding sleeve; a die sleeve is arranged in the inner pore of the die seat and above the lower guiding sleeve; the internal diameter of the die sleeve is equal to the external diameter of a workpiece; the upper end of the die sleeve is detachably provided with an upper guiding sleeve; the inner pore of the upper guiding sleeve is an upper guiding pore; the upper part of the inner pore of the lower guiding sleeve is provided with a cutter entering pore avoiding an extrusion head cutter; the pore diameter of the cutter entering pore is less the internal diameter of the die sleeve; the lower part of the inner pore of the lower guiding sleeve is a lower guiding pore; the male die comprises a guiding rod having a guiding direction movably fitting with the upper and lower guiding pores; and the middle part of the guiding rod is provided with the extrusion head cutter having saw-shaped inner teeth. The cold extrusion device, which enables positioning to be carried out through the upper and lower guiding sleeves and the cold extrusion process to be completed through a case that the extrusion head cutter traverses from one end of the workpiece to the other end of the workpeice, has the advantages of simple structure, small comprehensive error, and good dimensional consistency of processed products.

Description

technical field [0001] The invention relates to a cold extrusion device for processing a serrated inner hole, and also relates to a die and a punch of the cold extrusion device. Background technique [0002] At present, it is very difficult to process the serrated inner teeth. The outer star wheel of the overrunning clutch is a part with a complex inner hole cavity. The cold extrusion device for processing the inner hole of the overrunning clutch in the prior art is like Die Industry, Volume 32, 2006 The 6th issue discloses the cold extrusion die of the serrated internal gear sleeve, including the lower die plate, the upper end of the lower die plate is equipped with the lower die backing plate, the lower die backing plate is fixed with the lower die seat, and the lower die seat is equipped with a concave Die sleeve, die sleeve is equipped with a die core, the lower mold base is provided with a lower mold pressure plate that presses the lower mold base on the lower template,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cold extrusion device to solve the problem in the prior art that the processed product has a large error due to the complex structure of the prior art. At the same time, the purpose of the present invention is to provide the cold extrusion device die, punch

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