Processing method of enlarging cold-rolling of inside and outside spherical surface ferrule piece as well as device thereof

Abstract

The invention relates to a cold rolling and expanding method and a device for producing the metal circular part with the internal and external spherical surfaces, belonging to the technical field of bearing part manufacturing. The invention mainly aims to solve the technical problems of producing the metal circular part with the internal and external spherical surfaces. The producing method of themetal circular part with the internal and external spherical surfaces comprises the following steps: firstly, steel manufacturing: the metal bar is manufactured into circular parts; secondly, material softening: the heat treatment is performed on the circular parts to obtain a low hardness in order to facilitate the cold rolling and expanding; thirdly, cold rolling preparation of the semi-finished products: the machining is adopted to produce the circular parts into the semi-finished products with a certain precision; fourthly, cold rolling and expanding for molding: the cold rolling processis performed; a concave groove on the external circle of a press roller of a die and a convex fluted shaft on the external circle of a mandrel are used for molding the workpiece, and a plurality of anti-thrust surfaces of an idler roller and a supporting wheel are used for stabilizing the workpiece and limiting the axial movement of the workpiece. The invention has the advantages of capability ofimproving mechanical property for the circular part, high productivity and good uniformity of the workpiece shape, high processing precision and high material utilization ratio.

Description

technical field [0001] The invention relates to the processing technology of bearing parts, in particular to a method of processing inner and outer spherical metal rings by cold rolling method and the technology of corresponding devices. Background technique [0002] Inner and outer spherical metal rings are widely used in the field of bearings. Typical workpieces are: outer rings of bearings with housings, outer rings of self-aligning bearings, joints of joint bearings, universal ball cages, etc. Common materials used are bearing steel, stainless steel and low carbon alloy steel. In addition to requiring high manufacturing precision, this type of parts also has high requirements for their intrinsic quality because most of their workplaces are used in the fields of automobiles, agricultural machinery and machinery. [0003] At present, the typical processing technology of this type of parts is: the steel is forged or perforated and extubated to form a metal ring with a cert...

AI Technical Summary

Problems solved by technology

[0004] 1) The processing efficiency of the spherical surface is low. Since the inner spherical surface or the outer spherical surface is usually processed by profiling lathes, CNC lathes or special spherical lathes, the tool cuts the workpiece along a certain trajectory during processing, and is limited by the shape of the blank, requiring multiple passes to complete The processing of one working surface, so the production efficiency is low;

[0005] 2) Waste of material, limited by forging and pipe making conditions, the workpiece blank is machined according to the maximum diameter of the inner and outer diameters of the finished workpiece, and a large amount of material is wasted due to the influence of the spherical radian;

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