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Idle gear of heavy-duty engine and production method thereof

A production method and engine technology, applied in the direction of engine components, machines/engines, belts/chains/gears, etc., can solve problems such as pitting and broken teeth, and achieve the elimination of tooth surface pitting and broken teeth, strengthening hardness, The effect of improving wear resistance

Inactive Publication Date: 2009-09-09
湖北郧齿齿轮科技股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of easy pitting and broken teeth on the tooth surface of the existing engine idle gear, improve the wear resistance and service life of the gear, and meet the use requirements of the engine, the invention proposes an idle gear for a heavy-duty engine and its production method

Method used

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Embodiment Construction

[0007] Describe the present invention in detail below in conjunction with embodiment:

[0008] An idler gear of a heavy-duty engine, the selected production material is 38CrMoAl, and its production method is: rough machining of tooth blank → quenching and tempering → finishing of tooth blank → tooth profile processing → nitriding → pressing bushing → turning bushing.

[0009] The tempering treatment method is: salt bath quenching and high temperature tempering, the specific steps are:

[0010] 1. Start heating up to melt the salt in the salt bath furnace, the temperature is 940°C.

[0011] 2. Put the tooth blank after rough turning into the molten salt solution, raise the temperature to 940°C, and keep it warm for 720 seconds.

[0012] 3. After the holding time is up, quickly quench the tooth blank into No. 10 engine oil, and control the oil temperature at 20-120°C until cooling.

[0013] 4. Put the quenched tooth blank into the tempering furnace, raise the temperature to 60...

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Abstract

The invention provides an idle gear of a heavy-duty engine, production material of which is 38 CrMoAI. The production method of the idle gear is as follows: gear blank rough machining-hardening and tempering-gear blank fine machining-tooth shape machining-nitriding-pressing bushing-lathing bushing-rust prevention treatment. The hardening and tempering is carried out by changing the material so as to strengthen the hardness of the engine body and increase the synthesized mechanical property of the idle gear; the 38 CrMoAI material is fragile nitrided steel which has good strength, high hardness, and obvious increased wearing resistance; by the technique, tooth flank fatigue pitting and snaggletooth phenomenon are eliminated, thus increasing the wearing resistance and service life of the tooth flank and overall performance of the engine and meeting Europe IV emission and noise requirements.

Description

technical field [0001] The invention relates to an idler gear of a heavy-duty engine and a production method thereof. Background technique [0002] The material used for the existing idler gear of the engine is 20CrMnTi, and the adopted process is tooth blank processing→tooth profile processing→nitriding→pressing bushing→turning bushing→rust prevention. , causing the engine to malfunction. Contents of the invention [0003] In order to solve the problem of easy pitting and broken teeth on the tooth surface of the existing engine idle gear, improve the wear resistance and service life of the gear, and meet the use requirements of the engine, the invention proposes an idle gear for a heavy-duty engine and a production method thereof. [0004] The technical solution of the present invention is: an idler gear of a heavy-duty engine, characterized in that: the production material of the idler gear of a heavy-duty engine is steel containing 38CrMoAl. [0005] The production me...

Claims

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Application Information

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IPC IPC(8): F02B77/00F16H55/06F16H55/17
Inventor 姜盛堂姜盛侠谢旭辉吕海珠张建明黄自胜李德荣
Owner 湖北郧齿齿轮科技股份有限公司
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