Processing method of cold extruded high wear-resistant bearing outer ring

Abstract

The invention relates to a processing method for a cold-extruded high-wear-resistant bearing outer ring, and belongs to the technical field of bearing outer ring processing. The processing method comprises the following steps: cutting and unloading, performing spheroidizing, annealing and softening treatment after a punching machine heads a cake, performing shot-blasting treatment and acid-pickling, phosphating and saponifying on an annealed workpiece, and performing cold-extrusion forming by the punching machine. A processing process of roughly turning inner holes is performed on inner shaftholes in a numerical-control lathe, and a fine processing process for an outer circle, an inner bottom surface, an outer circle step and an outer end surface is performed. Positioning slots are processed between the inner holes and the inner bottom surface through a special tool, and a special rolling knife is finally adopted to roll the inner holes. A new outer diameter abrasive belt finishing process improves surface roughness of the inner holes. The processing method has the advantages of being simple in process, less in cutting amount, small in form and location tolerance, high in dimension precision, excellent in roughness, good in stable stability and short in processing period. A new thin-wall structure carbonitriding process is adopted, so that the problem that waste on labor hoursand energy is caused when a conventional process roughly and finely grinds inner and outer circles as well as inner and outer end surfaces is avoided.

Description

technical field [0001] The invention relates to the technical field of bearing outer ring processing, in particular to a processing method for a cold-extruded high wear-resistant bearing outer ring. Background technique [0002] The main technological conditions of general sleeve parts in machining are to ensure the mutual position accuracy of the inner and outer circles (that is, to ensure the coaxiality of the inner and outer circle surfaces and the perpendicularity requirements between the axis and the end face) and to prevent deformation. [0003] At present, the processing procedure of bearing outer circle is as follows: [0004] (1) The bearing sleeve should be rough first and then fine. For the processing content of rough and fine machining in one process, all surfaces are firstly rough-machined, and then semi-finishing and finishing are carried out to gradually improve the machining accuracy. The principle of this step sequence arrangement requires that the rough c...

AI Technical Summary

Problems solved by technology

[0008] The invention mainly solves the problems of high labor intensity, large cutting allowance, low dimensional accuracy, poor quality stability and long processing cycle in the prior art, and provides a processing method for the outer ring of a cold-extruded high-wear-resistant bearing, which has a process The advantages of simplicity, less cutting amount, small shape and position tolerance, high dimensional accuracy, superior finish, good quality stability and short processing cycle

It solves the problems of large cutting volume, complex process and many scrapped products

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