Process for precisely forming inner ferrule blank and outer ferrule blank of bearing

Abstract

The invention discloses a process for precisely forming an inner ferrule blank and an outer ferrule blank of a bearing. The process comprises the following steps of: obtaining a cylindrical blank by adopting a precise blanking mode; heating the cylindrical blank to the temperature of 900 DEG C austenite, and performing temperature upsetting to obtain an upset piece; performing composite temperature squeezing on the upset piece by using a composite temperature squeezing die, and squeezing by one step to obtain a middle squeezed piece with the inner ferrule blank and the outer ferrule blank; performing primary separation on the middle squeezed piece by using a primary stamping die to obtain the outer bearing ferrule blank, a middle technical waste material and a middle stamped piece with the inner ferrule blank; and performing secondary separation on the middle stamped piece with the inner ferrule blank by using a secondary stamping die to obtain an annular waste material and the inner ferrule blank. According to the method, the process flow is simple and reliable, and is easy to implement; and the process has the advantages of high material utilization rate and high production efficiency.

Description

technical field [0001] The invention relates to the technical field of blank production of inner and outer rings of bearings, in particular to a precision forming process for blanks of inner and outer rings of bearings. Background technique [0002] At present, a cold extrusion process used in the production of bearing ring blanks at home and abroad is: blanking - medium temperature heating - warm upsetting - stress relief annealing - composite cold extrusion of inner and outer rings - outer ring Separation of the blank—cutting the bottom of the outer ring——stress relief annealing of the blank of the inner ring—cold extrusion of the blank of the inner ring—cutting the bottom of the inner ring to obtain the blank of the inner and outer ring. The disadvantage is that the process is too cumbersome and the processing time Long, high manufacturing cost. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the object of the ...

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Problems solved by technology

[0002] At present, a cold extrusion process used in the production of bearing ring blanks at home and abroad is: blanking - medium temperature heating - warm upsetting - stress relief annealing - composite cold extrusion of inner and outer rings - outer ring Separation of the blank—cutting the bottom of the outer ring——stress relief annealing of the blank of the inner ring—cold extrusion of the blank of the inner ring—cutting the bottom of the inner ring to obtain the blank of the inner and outer ring. The disadvantage is that the process is too cumbersome and the processing time long, high manufacturing cost

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