Forming technological method for high-ferrum bearing ring with metal flow lines distributed along roller path

Abstract

The invention relates to a forming technological method for a high-ferrum bearing ring with metal flow lines distributed along a roller path. The method includes the following steps that S1, heading, blind hole punching and the like are used for hot forging so that a high-ferrum conical bearing ring blank can be manufactured, and then common hot rolling is conducted on a precision hot rolling mill to preset a near-shape conical high-ferrum conical bearing inner ring forged piece and an outer ring forged piece; S2, a roller mold is replaced on the precision hot rolling mill to perform precision near-shape hot rolling, a high-ferrum conical bearing ring roller path molded surface is formed, and accordingly an annular forged piece with the metal flow lines distributed along the roller path can be formed; S3, deformation heat treatment is immediately conducted on the precision hot rolling-formed high-ferrum bearing ring with the metal flow lines distributed along the roller path; and S4, the high-ferrum bearing ring subjected to hot rolling forming and deformation heat treatment is ground, ultra-precision subsequent machining is also performed, and accordingly the high-ferrum bearing ring piece with the required geometric accuracy can be obtained. By the adoption of the method, the high-ferrum bearing ring roller path can be formed directly, so that the metal flow lines are distributed along the roller path, and the phenomena that the material utilization rate is reduced due to high working allowance cutting and the metal flow lines are cut off through cutting machining are avoided.

Description

technical field [0001] The invention relates to the field of hot rolling forming, and more specifically relates to a high-speed rail bearing ring forming process method in which metal streamlines are distributed along raceways. Background technique [0002] High-speed rail tapered bearing inner ring (such as figure 1 As shown) the shape is asymmetrical in the axial direction, and there are steps at the large and small ends. The distribution of metal volume along the axial direction varies greatly, and the wall thickness varies greatly (the maximum wall thickness is 22.85mm, the minimum wall thickness is 10.15mm, and the wall thickness difference is 2 times. ). High-speed iron tapered bearing outer ring (such as figure 1 As shown) although the shape is symmetrical in the axial direction, the axial dimension is more than twice that of the conical inner ring, the distribution of metal volume along the axial direction varies greatly, and the wall thickness varies greatly (the ...

AI Technical Summary

Problems solved by technology

This process cuts metal to form a raceway, resulting in low material utilization. After a large cutting allowance, the raceway of the high-speed iron tapered bearing ring cuts off the metal flow line, and the metal flow line cannot be distributed along the raceway.

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