Precision forging plastic molding process for internal toothed rings of planetary speed reducers

Abstract

The invention discloses a precision forging plastic molding process for internal toothed rings of planetary speed reducers. The precision forging plastic molding process includes steps of 1, performing warm forging plastic molding; 2, performing low-temperature annealing and cylindrical lathe cutting to reduce wall thickness difference caused by extrusion, and performing shot blasting, phosphating and saponification treatment; 3, performing cold forging plastic molding. The precision forging plastic molding process has the advantages that the quality of products manufactured by the process is stable, accumulated errors among tooth profiles are few, the yield is high, the production efficiency can be improved, the production period is short, a machining method for extensively machining internal toothed rings by the aid of machine tools after the internal toothed rings are subjected to hot forging can be replaced, accordingly, machining workload on machine tools can be reduced, precision requirements can be met, the manufacturing cost can be reduced, the manufacturing period can be shortened, and the precision forging plastic molding process conforms to the development trend of the manufacturing industry in the present world.

Description

technical field [0001] The invention relates to a precision forging plastic forming process for an internal gear ring of a reducer, in particular to a precision forging plastic forming process for an internal gear ring of a planetary reducer. Background technique [0002] The ring gear is generally used in the planetary reduction system. The planetary reduction system is generally composed of a sun gear, multiple planetary gears, and an inner gear ring. The inner gear ring is an important part of the planetary reduction system, and its quality requirements are directly related to the planetary reduction system. The overall quality of the gear ring is complicated in the manufacturing process and difficult to process, especially the tooth shape, pitch, and gear precision are difficult to control. The general processing method of this kind of gear ring is: cutting material→heating→hot forging→rolling ring→ Machined finished product. The precision of the inner gear ring produce...

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Problems solved by technology

[0003] The invention provides a precision forging plastic forming process for the inner gear ring of a planetary reducer, which mainly solves the problem of the existing traditional processing technology, which requires a lot of investment in machine tools, waste of metal materials in cutting processing, large accumulated errors in tooth profile processing, low yield rate, and labor-intensive processing. The production efficiency is low, the production cycle is long, the processing cost is high, and the technical problems of protecting the production environment. Using warm and cold precision forging composite plastic molding technology, first upsetting, extrusion, and punching are made into preformed blanks, and then extruded in the forming die cavity. Compression-plastic deformation to form the inner circumference precision forged gear

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