Anti-fatigue manufacturing method of car transmission gear

A technology of transmission gear and manufacturing method, applied in the direction of manufacturing tools, coatings, furnace types, etc., can solve problems such as uneconomical, achieve zero pollution, improve fatigue life, and realize the effect of online quenching quality inspection

Active Publication Date: 2013-09-18
天津市天瑞硬化工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above content shows that the gear machine tools and cutting tools have been able to guarantee the high-efficiency production of 6-6-6-level precision gears by the hobbing-shaving gear process, and even 5-level precision gears, while using expensive worm gear grinding machines to produce 6-level precision gears gears are extremely uneconomical

Method used

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  • Anti-fatigue manufacturing method of car transmission gear
  • Anti-fatigue manufacturing method of car transmission gear
  • Anti-fatigue manufacturing method of car transmission gear

Examples

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Embodiment Construction

[0033] The application examples of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] First, combined with the figure 1 A typical process of carburizing and quenching gears in the prior art is given. This typical carburizing and quenching process is still the dominant process for automotive transmission gears. It can be seen from this that rolling and shaving gears are a mature and economical production method in the automotive industry. However, this traditional process can only produce gears with grade 7 or 7-8 precision. In addition, this process also has the defects of high energy consumption and heavy pollution. Therefore, various factors that promote change are promoting the birth of new technologies .

[0035] attached figure 2 The anti-fatigue manufacturing process route of the cylindrical gear of the car transmission among the present invention is provided, and its specific implementation steps are descr...

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Abstract

An anti-fatigue manufacturing method of a car transmission gear comprises the steps that forging blanking, heat pretreatment (isothermal normal fire), gear blank processing, gear hobbing, gear strengthening and toughening treatment (the gear part is subject to two times of induction heating and circulatory quenching), modification of criteria to the drawing demand, gear hobbing, gear shaving and gas nitrizing process are carried out in sequence. By adopting the method, 6-grade or more than 6-grade precise car gears can be efficiently produced in batch at low price, and the produced car gears has the bearing/carrying capacity almost as well as that of alloy cemented steel. The car transmission gear manufactured by adopting the method can replace the carburized and quenched gear in the prior art.

Description

technical field [0001] The invention belongs to the field of gear manufacturing, and relates to a method for manufacturing car transmission gears, in particular to an anti-fatigue manufacturing method for car transmission gears. Background technique [0002] At present, the annual output of cars in the world is more than 40 million, and the total production of transmission gears accounts for more than 90% of the total production of gears. This is a field with considerable output. Car transmission gears in the prior art (the present invention mainly relates to cylindrical gears) all adopt the carburizing and quenching process, and the carbonitriding process has also been used. Due to the metallographic defects of internal oxidation in this process, the carbonitriding process Has turned to carburizing and negative pressure carburizing. At present, the precision of car transmission gears is generally specified as 7-6-6 (GB10095-88), but the precision of gears after carburizing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14C21D1/18C21D1/42C21D9/32C23C8/26C23F17/00
CPCY02P10/25
Inventor 张元增
Owner 天津市天瑞硬化工程有限公司
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