Double-active rubbing forming method for short cylindrical roller bearing outer ring main roll core roll of aerospace main shaft

Abstract

The invention relates to a forming method for a bearing outer ring for an aviation main shaft cylindrical roller. A master roller and core roller active-active twist-roll forming method for the bearing outer ring for the aviation main shaft cylindrical roller is characterized by comprising the steps of 1, blanking, wherein bars are sawn into material sections; 2, blank making, wherein the material sections are heated to heat distortion temperature from indoor temperature, conducting upsetting, punching and wad punching on the hot material sections, and obtaining ring blank for rolling; 3, conducting master roller and core roller active-active twist-roll forming by means of a ring rolling machine, wherein the ring blank is placed into a heating furnace to be heated, taken out when temperature rises to the heat distortion temperature, and then placed in a hole of the ring rolling machine, a master roller and a core roller are driven at the same time for twist-roll forming, sound lubrication is kept between the ring blank and the rollers during rolling, and a ring forging with a rectangular section is obtained through multiple turns of rolling of the ring blank; 4, conducting mechanical cutting on the forging to obtain the bearing outer ring for the aviation main shaft cylindrical roller. The method has the advantages that plastic deformation quality is high, cost is low, and production efficiency is high.

Description

technical field [0001] The invention relates to a forming method for a bearing outer ring of a short cylindrical roller of an aviation main shaft, in particular to a method for forming an outer ring of a bearing of a short cylindrical roller of an aviation main shaft by double active rubbing with a core roller of a main roll. Background technique [0002] my country's aviation and high-end equipment manufacturing industry has developed in the past few decades. The problem of raw material preparation has been basically solved through vacuum induction melting and vacuum arc remelting. High-precision CNC machining and heat treatment equipment can ensure the high-precision machining and strengthening requirements of the bearing surface. However, Fatigue damage due to fragmentation of grain streamlines composed of primary carbides, severe plastic flow below the contact surface with fractured carbides, and loss of material substance due to high temperature and fluid corrosion of gra...

AI Technical Summary

Problems solved by technology

The main problems of this process in producing the outer ring of short cylindrical roller bearings for aviation spindles are: 1) The plastic deformation of upsetting and elongating is uneven and sufficient, resulting in coarse grains and uneven distribution of hard phases; 2) Large machining allowance, Low material utilization rate; 3) Large material thermal flow stress; 4) Long processing time and high production cost

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