Process for processing space ring of double-section drive axle for automobile

Abstract

The invention relates to a process for processing a space ring of a double-section drive axle for an automobile, comprising the following steps: the end surface and the excircle of a blank are roughly lathed with a lathe, and the end surface, the inner hole and the excircle of the blank are finely lathed; the processed work piece is quenched under high frequency, and the quenched work piece is loaded in a furnace so that the quenched work piece is glowed and compact and uniform corrosion-resistant white bright layer is formed on the surface of the glowed work piece; the excircle of the glowed work piece is firstly roughly ground and then finely ground with a grinder with the roughness of the work piece being controlled between Ra 0.3 and Ra 0.5 until the space ring is produced. The process can improve the processing precision of the space ring and the assembling precision of the space ring and an oil seal, further save the energy, enhance the work efficiency and facilitate the operation and is particularly suitable for deep hole and slit nitridation.

Description

technical field [0001] The invention relates to a processing technology for a spacer ring of an automobile drive axle, in particular to a processing technology for a spacer ring of a double-section drive axle of a heavy-duty automobile, and belongs to the technical field of auto parts manufacturing. Background technique [0002] The double-section drive axle spacer is an important seal in heavy-duty vehicles. Once the spacer fails, it will cause the gears and bearings in the drive axle to lose oil, aggravate the wear and tear of the parts and cause early damage, and even lubricating oil will flow into the wheel reducer. The broken oil seal enters the brake drum, causing poor braking and endangering driving safety. The current methods for producing and processing spacers, as disclosed in CN2007100212772, mostly adopt the following process: rough machining→rough grinding of the outer circle→soft nitriding→polishing of the outer circle. During production, the general process r...

AI Technical Summary

Problems solved by technology

This process has the following problems: First, the finished product error is the sum of machining error and heat treatment deformation, which increases the finished product error and makes it difficult to meet the design requirements; secondly, due to the low hardness of the material during rough grinding, the fine-grained grinding wheel is extremely It is easy to stick to the knife, and it is difficult to meet the roughness requirements and realize non-thread grinding. The roughness is large, and it is difficult to throw away the spiral pattern during polishing. If the polishing is deep, it is easy to damage the white layer after nitrocarburization, so the processing is more difficult. In addition, the materials used and the nitrocarburizing process are unstable, resulting in large deformation after nitrocarburizing, and some deformations even exceed 0.1mm, plus processing errors, so the requirements for 0.04mm runout and 0.02mm cylindricity are difficult ensure