Multi-station assembling mold and process for necking and bulging elastic spacer of rear driving axle of automobile

Abstract

The present invention relates to a multi-station assembling mold and process for necking and bulging an elastic spacer of a rear driving axle of an automobile. The mold is divided into an upper half part and a lower half part; the upper half part includes an upper template, a washer, a guide sleeve, a discharging spring, an upper backing plate, an upper fixing plate, a bulging upper limit block, anecking guide core and a bulging upper mold; and the lower half part includes a guide post, a necking positioning plate, a lower fixing plate, a necking die, a necking lower top plate, an ejector rod, a bulging lower die, a bulging lower limit block, a lower backing plate and a lower template. In the mold of the present invention, a mold calibration spigot that automatically calibrates the mold bulging gap is used, and the upper mold is provided with a discharging spring, so that the bulged workpiece is not adhered to the bulging upper mold and the like; and a traditional two-step process iscombined into a multi-station combination process, the production efficiency is improved by 47%, the service life of the mold is increased by 2.6 times, and the product quality is stable.

Description

technical field [0001] The invention belongs to the field of mechanical equipment, and relates to a manufacturing mold for an elastic spacer, in particular to a multi-station combination mold for necking and bulging of an elastic spacer for an automobile drive rear axle and a combination process. Background technique [0002] The preload of the main gear bearing of the rear axle reducer has a great influence on the performance of the entire axle. Generally speaking, there are two assembly forms for adjusting the clearance of the main gear bearing: rigid spacer and elastic spacer. The elastic spacer can adjust the pre-tightening force of the bearing within a certain range, and can adjust the pre-tightening force of the bearing to the best state, so as to avoid the axial movement caused by the over-tightening of the bearing assembly or the looseness of the bearing, and reduce the Assembly noise improves the quality of the main reducer assembly; at the same time, because of it...

AI Technical Summary

Problems solved by technology

This mold is mainly suitable for step expansion and shrinkage processing, but not suitable for shrinkage and bulging processing in the middle of the elastic spacer

[0004] In addition, the elastic spacer is processed in five steps according to the traditional production method. The process flow is: blanking→rough turning length→shrinking→bulging→finishing length to meet the product design requirements. Due to the elastic spacer production The batch is large, so using the traditional production process, not only the number of molds to be installed is large, the production time is long, but also the material distribution between multiple devices is required, and the production efficiency is low

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