Double carburization protecting process in manufacture of bearing outer ring of squirrel-cage elasticity support

Abstract

The invention belongs to the technical field of bearing manufacture, and mainly relates to a double carburization protecting process in manufacture of a bearing outer ring of a squirrel-cage elasticity support. The process comprises the following steps: 1) adding allowance on a non-raceway surface and a raceway surface to protect reserved allowance in machining; performing whole copper-plating protection on the bearing outer ring of the squirrel-cage elasticity support; 2) lathing a bearing copper plating layer with a carburized surface before carburizing process to ensure that the bearing raceway achieves the required size of a lathing finished product; 3) integrally carburizing the bearing outer ring of the squirrel-cage elasticity support to ensure that the raceway surface has the surface hardness in accordance with the technical requirement; and 4) lathing the carburized protective layer on the non-raceway surface, manufacturing the non-raceway surface to be in accordance with the finishing size requirement, and turning to the next process subsequently for manufacture according to the normal process. The invention adopts double carburization protection means, namely copper plating and allowance addition for complementation, has the advantages of high utilization rate of materials, low machining cost, stability and reliability, and ensures position accuracy in raceway manufacturing. The process is safer and more reliable, and can completely meet the requirement of products.

Description

technical field [0001] The invention belongs to the technical field of bearing processing, and mainly relates to a double carburizing protection process in the processing of the outer ring of a squirrel cage elastic bearing. Background technique [0002] Carburizing is to increase the carbon content of the working surface layer and form a certain carbon content gradient in it. The workpiece is placed in the carburizing medium to heat and keep warm, so that carbon atoms can penetrate into the steel surface layer of carburizing steel. It is also to make the workpiece of low carbon steel have a surface layer of high carbon steel, and then after quenching and low temperature tempering, the surface layer of the workpiece has high hardness and wear resistance, while the central part of the workpiece still maintains the toughness and toughness of low carbon steel. Plasticity, so that the workpiece can withstand impact loads. Due to the change of surface hardness and wear resistanc...

AI Technical Summary

Problems solved by technology

It is difficult to guarantee the technical requirements by using the existing processing method of the outer ring of the bearing

If only the copper plating layer protection method is used, the thickness of the copper plating layer on the surface of the non-raceway is not easy to guarantee, which affects the machining accuracy of the parts, and it is difficult to meet the technical requirements of the parts; the squirrel cage elastic support structure bearing is a thin-walled part, and if only the reserve amount is used for protection In this method, the non-raceway surface of the part becomes larger, and the surface hardness of the part increases after carburizing, which causes greater internal stress in the part during processing, making it difficult to process, and the part is easily deformed, failing to meet the technical requirements of the part , and due to the special material of the squirrel cage elastic bearing (the material is G13Cr4Mo4Ni4V), the price is expensive, and the method of adding reserve protection will cause material waste and increase production costs

Images