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Automobile gearbox P-gear gear manufacturing method

A technology of automobile gearbox and manufacturing method, which is applied to vehicle parts, transportation and packaging, etc., can solve the problems of many metal raw materials, increase manufacturing cost, and high scrap rate of parts, achieve complete metal streamline, reduce scrap rate, and surface quality. improved effect

Inactive Publication Date: 2015-10-21
CHONGQING CHUANGJING WARM FORGING FORMING
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AI Technical Summary

Problems solved by technology

[0003] The parking gear has precise external teeth, which are mostly manufactured and processed by machining. The existing technology is processed by gear hobbing machine, which takes a long time to process, does not have high precision, consumes more metal raw materials, and has a high scrap rate of parts. Increased manufacturing costs and other deficiencies

Method used

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  • Automobile gearbox P-gear gear manufacturing method
  • Automobile gearbox P-gear gear manufacturing method
  • Automobile gearbox P-gear gear manufacturing method

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Embodiment 1

[0026] A preparation method for a P-gear of an automobile gearbox, comprising the following steps:

[0027] (1) According to the process design requirements, the raw materials are sawed into material sections, inspected for cracks by flaw detection, and then sprayed with lubricant and dried; the raw material of the P gear of the car is alloy steel, commonly used 20CrMoH, after cutting according to the process design requirements, and then Use flaw detection equipment to check whether there are cracks, and if there is, it will be judged as unqualified; then spray lubricant on the surface, and the commonly used lubricant is graphite or organic polymer lubricant.

[0028] (2) Heat the billet to 1100°C-1150°C in an intermediate frequency induction heating furnace with a protective atmosphere, and warm forge it on a press to form a pre-forged billet; the heating temperature in the intermediate frequency induction heating furnace can be selected from 1100°C, 1105°C, 1110°C, 1115°C, ...

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Abstract

The invention provides an automobile gearbox P-gear gear manufacturing method. An automobile gearbox P-gear gear is finally formed by conducting cold extruding after warm forging is conducted in a warm forging manufacturing mode. The automobile gearbox P-gear gear is characterized in that positive and negative combined extrusion is adopted for cold extruding, and outer teeth are extruded while extrusion forming of the petal portion in a product is finished. The product made through the method is high in accuracy, less in oxidation, good in internal metal organization and more refined in crystalline grain, and harmful structures of coarse crystals, mixed crystals and the like can be avoided; the required equipment is small in tonnage and less in forming force, tooth filling is easier, unit intensity of pressure born by a die is remarkably lowered, the service life of the die is very long, the process can be reduced, and the manufacturing time is greatly shortened (increased by 10 times compared with a gear hobbing machine). The product hardness ranges from HB 140 to HB 180, the tooth profile is fully filled and full, and it is guaranteed that large deformation cannot be generated in subsequent heat treatment of cold extrusion forming.

Description

technical field [0001] The invention belongs to the field of metal processing, and relates to a method for preparing a P gear of an automobile gearbox. Background technique [0002] The parking gear is a very important part in the car gearbox, which plays the role of controlling the parking, including the precise external gear part. The quality of its production is directly related to the safety of the car and the comfort of the ride. [0003] The parking gear has precise external teeth, which are mostly manufactured and processed by machining. The existing technology is processed by gear hobbing machine, which takes a long time to process, does not have high precision, consumes more metal raw materials, and has a high scrap rate of parts. Increased deficiencies such as manufacturing cost. [0004] Now, warm forging combined with cold extrusion is used to extrude the outer teeth, which can meet the tooth shape accuracy, surface profile and roughness of the product, improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14B23P2700/50
Inventor 苏涛高凤强敬勇胡鹏晨
Owner CHONGQING CHUANGJING WARM FORGING FORMING
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