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Vehicle transmission gear and manufacturing method thereof

A technology of an automobile gearbox and a manufacturing method, applied in the field of auto parts, can solve the problems of poor lubrication conditions, driving operation, gear wear, starting jitter, etc., so as to reduce excessive carbon content, reduce deformation, and ensure hardenability. Effect

Inactive Publication Date: 2019-09-10
兴化市统一齿轮有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the normal wear and tear of the gears, the quality of the lubricating oil, poor lubrication conditions, improper driving operation, and improper gnawing positions of the gear assemblies during maintenance will all cause gear impacts, poor gear teeth gnawing, and starting vibrations. etc. will accelerate the wear and damage of the gear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, the automobile gearbox gear is manufactured by the following method:

[0052] S1, blank forming: heating the steel for manufacturing automobile gearbox gears to 1140°C to 1210°C, then putting the steel into a hot forging die, and forging it into a gear blank, wherein the steel includes the following components in weight percentage: C is 0.27 %; Si is 0.16%; Mn is 0.9%; Ti is 1.3%; Cr is 2.2%; Cu is 0.42%; Ni is 0.17%; Al is 0.025%; N is 0.015%; Mg is 0.038%; Mo is 0.24 %; S ≤ 0.02%; P ≤ 0.03%; the balance is Fe and unavoidable impurities;

[0053] S2, Pre-heat treatment: Cool the gear blank to room temperature and put it into an annealing furnace for spheroidizing annealing. The annealing temperature is 670°C for 3 hours, then it is rapidly cooled to 535°C with strong wind, and isothermally treated in the tempering furnace at 535°C. The time is 3h, then cooled to room temperature;

[0054] S3, Turning processing: take out the annealed gear blank, i...

Embodiment 2

[0067] In this embodiment, the automobile gearbox gear is manufactured by the following method:

[0068] S1, blank forming: heating the steel for manufacturing automobile gearbox gears to 1140°C to 1210°C, then putting the steel into a hot forging die, and forging it into a gear blank, wherein the steel includes the following components in weight percentage: C is 0.31 %; Si is 0.18%; Mn is 1.1%; Ti is 1.6%; Cr is 2.5%; Cu is 0.4%; Ni is 0.1%; Al is 0.02%%; N is 0.01%%; Mg is 0.03%; Mo 0.15%; S ≤ 0.02%; P ≤ 0.03%; the balance is Fe and unavoidable impurities;

[0069] S2, pre-heat treatment: Cool the gear blank to room temperature and put it into an annealing furnace for spheroidizing annealing. The annealing temperature is 680°C for 3.5 hours, and then it is rapidly cooled to 545°C with strong wind, and isothermally treated in the tempering furnace at 545°C. , the time is 2h, then cooled to room temperature;

[0070] S3, Turning processing: take out the annealed gear blank, ...

Embodiment 3

[0083] S1, blank forming: heating the steel for manufacturing automobile gearbox gears to 1140 ℃ ~ 1210 ℃, then putting the steel into a hot forging die, forging into a gear blank, wherein the steel includes the following components in weight percentage: C is 0.25 %; Si is 0.15%; Mn is 0.8%; Ti is 1.1%; Cr is 1.8%; Cu is 0.45%; Ni is 0.25%; Al is 0.03%; N is 0.02%; Mg is 0.045%; Mo is 0 .35%; S ≤ 0.02%; P ≤ 0.03%; the balance is Fe and unavoidable impurities;

[0084] S2, pre-heat treatment: Cool the gear blank to room temperature and put it into an annealing furnace for spheroidizing annealing. The annealing temperature is 660°C for 3.3 hours, and then it is rapidly cooled to 520°C with strong wind, and isothermally treated in the tempering furnace at 520°C. , the time is 2 ~ 3h, then cooled to room temperature;

[0085] S3, Turning processing: take out the annealed gear blank, install and fix it on the lathe for turning processing, and reserve a machining allowance of 0.5mm...

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Abstract

The invention provides a vehicle transmission gear and a manufacturing method thereof. The manufacturing method comprises the steps of blank forming, preheating treatment, turning machining, final heat treatment and finish machining, wherein the final heat treatment step comprises multiple times of carburization, carbonitriding, quenching, tempering and the like. The vehicle transmission gear manufactured through the manufacturing method has the excellent comprehensive performance.

Description

technical field [0001] The invention relates to an automobile transmission gear and a manufacturing method thereof, belonging to the technical field of automobile accessories. Background technique [0002] The gearbox mainly refers to the gearbox of the car. It is divided into manual and automatic. The manual transmission is mainly composed of gears and shafts, and the variable speed and torque are generated through different gear combinations; while the automatic transmission AT is composed of a hydraulic torque converter, a planetary gear and a hydraulic control system. Variable speed and torque are achieved through hydraulic transmission and gear combination. However, whether it is a manual transmission or an automatic transmission, transmission gears are required. [0003] Transmission gears often work at high speeds, high loads, and constant alternation of speeds and loads. In addition to the normal wear and tear of the gears, the quality of the lubricating oil, poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 张日辉孙存辉李美云朱梁贤
Owner 兴化市统一齿轮有限公司
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