Processing process of ball bag-shaped stainless steel retainer

Abstract

The invention belongs to the technical field of bearing processing and provides a processing process of a ball bag-shaped stainless steel retainer. The process comprises the following steps of: roughly turning end surfaces, the inner diameter and the outer diameter and cutting off; turning cut-off surfaces; softly grinding the outer diameter; softly grinding the two end surfaces; fine turning the inner diameter; drilling rivet holes and installing rivets; finally turning the outer diameter; finally turning the inner diameter; drilling; and boring. The invention has the advantages of simple process flow, convenient processing, reliable quality, higher efficiency and low cost. The parallel difference of the end surfaces can be guaranteed within 0.015mm by adopting the process, and the roughness is guaranteed within 0.5mum, thus good size and surface precision are obtained.

Description

technical field [0001] The invention belongs to the technical field of bearing processing, and mainly relates to a processing technology of a ball pocket type stainless steel cage. Background technique [0002] 1Cr18Ni9Ti stainless steel is used as a solid cage material for bearings. Due to its characteristics of acid and alkali resistance, corrosion resistance, and no rust, it has been widely used in bearings used in acid-base conditions and humid environments. For the bearing solid cage, the surface roughness requirements of the guide surface and the inner surface of the pocket hole are generally high, especially for high-precision bearings, the surface roughness of the pocket hole often requires Ra0.8~1.25μm, and it is necessary for the retention The geometric accuracy requirements of each surface of the frame are also very high. For example, a certain type of bearing cage is made of 1Cr18Ni9Ti stainless steel, and its structure is a two-half straight hole structure. The...

AI Technical Summary

Problems solved by technology

[0005] However, referring to the processing experience and process flow of other materials in the past, this stainless steel material is processed. Since the material is relatively sticky, the roughness and parallelism of the two ends of the product after the finishing process of the lathe are very poor, which cannot be achieved. The requirement of product accuracy also affects the processing of drilling holes in the subsequent process; when the outer and inner diameters of the final car are processed, the surface quality is not very ideal when using ordinary tools (such as white steel knives, ordinary machine clamping tools) and the roughness is not enough; Because the reaming is still processed by a drill bit, the hole is full of scratches, not only the size of the hole varies greatly, but also the roughness of the pocket is far from meeting the product requirements

[0006] At present, the most commonly used method in China to solve the quality of the end face of the part is to fix the workpiece on the workbench with magnetic force on the surface grinder, and use the grinding wheel end face to grind the end face of the workpiece. However, this material is a low magnetic material that is not easy to be The disk is sucked and fixed on the workbench, and the ordinary surface grinder processes multiple parts at a time, which is not suitable for processing a single part. Therefore, it is not a good way to softly grind both ends of the ordinary surface grinder; internally, It is best if all the grinding can be used for the final machining of the outer diameter. However, due to the poor magnetic permeability of the material and the current grinding machines are basically electromagnetic fixtures, the workpiece cannot be sucked by the grinding machine for grinding. The processing of the inner and outer diameters can only be improved in the turning process, and a more suitable tool is selected; the final processing of the hole is mainly due to the sticky material and high resistance, so to improve the quality of the pocket hole, it is necessary to use a higher speed during processing. Taller machines, sharper knives

Images