Precision forging plastic forming process for inner gear ring in planetary reducer

A planetary reducer, plastic forming technology, applied in the directions of wheels, transportation and packaging, vehicle parts, etc., can solve the problems of large accumulated error in tooth profile machining, large investment in machine tool equipment, low labor production efficiency, etc., to achieve shortened production cycle, The effect of saving raw materials and high yield

Inactive Publication Date: 2013-06-19
江苏威鹰机械有限公司
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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 effici

Method used

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  • Precision forging plastic forming process for inner gear ring in planetary reducer

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Effect test

Embodiment 1

[0017] Embodiment 1: A precision forging plastic forming process for the inner gear ring of a planetary reducer with a weight of 10Kg, including warm forging and cold forging plastic forming. The warm forging plastic forming includes the following steps: a. Cutting material: cutting by CNC sawing machine Metal bar; b. Billet shot blasting: sizing and measuring the metal bar, using ordinary lathe to chamfer the outer circle and end face, and then put the billet into the crawler shot blasting machine for surface sandblasting; c, coating Layer: heat the above-mentioned metal bar to 200°C in a warm forging intermediate frequency heating furnace, soak it in dilute graphite, and carry out surface coating; d, heating upsetting: heat the above-mentioned coated blank to 920°C and put it into the die , to extrude the upper end surface of the billet, so that the bar becomes a large-diameter cylinder; e, reverse extrusion: immediately put the upsetting billet into the reverse extrusion die...

Embodiment 2

[0018] Embodiment 2: A precision forging plastic forming process for the inner gear ring of a planetary reducer with a weight of 6Kg. The production steps are the same as in Embodiment 1, except that after the cold forging plastic forming step, annealing and cold pushing are further carried out Extrusion finishing forming step, the cold pushing and finishing forming is to use a finishing die to cold finish the annealed part into a final forging without subsequent processing on the tooth profile surface.

[0019] Using the above-mentioned temperature-cooling compound precision forging plastic forming technology, the product quality is stable, the accumulated error between tooth shapes is small, the yield is high, the strength is high, the density is high, impact resistance, the production efficiency is improved, the production cycle is shortened, raw materials are saved, and the cost is reduced. The production cost also protects the production environment, replaces the tradition...

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Abstract

The invention discloses a precision forging plastic forming process for an inner gear ring in a planetary reducer. The precision forging plastic forming process includes the following steps: (1), warm forging plastic forming is carried out; (2), normalizing, reforming, sand blasting, phosphating, surface saponification and treatment are carried out; and (3), cold forging plastic forming is carried out. By means of the process, a product is stable in quality, accumulative errors among tooth profiles are small, the rate of finished products is high, the working efficiency is improved, and the production cycle is short. A large amount of machining methods that a machine tool is adopted to carry out machining after hot forging are replaced, work quantities of machine tool machining are reduced, not only is the precision requirement met, but also the production cost is reduced and the production cycle is shortened, and meanwhile, the process also meets the trend of development of the worldwide manufacturing industries.

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...

Claims

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Application Information

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IPC IPC(8): B21K1/30
Inventor 张太良黄亦飞申剑张如亮黄恒桃
Owner 江苏威鹰机械有限公司
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