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Preparation method of wear-resistant and fatigue-resistant automobile steering shaft

A steering shaft and anti-fatigue technology, which is applied in the field of auto parts processing, can solve problems such as unsatisfactory torsional fatigue of the steering shaft, affecting the service life of the steering wheel, and hidden dangers of driving safety, so as to improve driving safety, light operation, and uniform heating Effect

Inactive Publication Date: 2019-11-22
含山县祥瑞运输有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the traditional steering shaft is arranged with a heat treatment process between the processing stages. Some dimensional requirements are met through rough turning and semi-finishing turning. The dimensional tolerance requirements and surface requirements of the parts are completed in the grinding process. The processing route is: Forging—rough turning—heat treatment—finish turning—grinding—inspection—warehousing. Although the obtained steering shaft has accurate dimensions and smooth surface, the torsional fatigue of the traditional steering shaft is not ideal. Fatigue phenomena such as disc wear and rust will affect the service life of the steering wheel and cause great hidden dangers to driving safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a wear-resistant and anti-fatigue automobile steering shaft, comprising the following steps:

[0021] (1) Grinding and polishing: Grinding and ultrasonic polishing the casted steering shaft, first use 800# sandpaper for grinding, and then use 1500# sandpaper for grinding, the frequency of ultrasonic polishing is 23kHz, and the polishing liquid is nanometer Silica sol polishing fluid smoothes the surface of the steering shaft, reduces the friction and wear when the steering shaft rotates, makes the steering wheel easy to operate, prolongs the service life of the steering shaft, and obtains abrasive parts;

[0022] (2) One-time heating: put the grinding piece in the heating furnace, heat it to 530°C at a rate of 5°C / min, and keep it warm for 30 minutes, so that the external temperature will rise rapidly, then naturally cool down to 370°C, and keep it warm for 40 minutes, which can lower the steering shaft Then increase the temperature to 970°C at a ...

Embodiment 2

[0028] A method for preparing a wear-resistant and anti-fatigue automobile steering shaft, comprising the following steps:

[0029] (1) Grinding and polishing: Grinding and ultrasonic polishing the casted steering shaft, first use 800# sandpaper for grinding, and then use 1500# sandpaper for grinding, the frequency of ultrasonic polishing is 24kHz, and the polishing liquid is nanometer Silica sol polishing fluid smoothes the surface of the steering shaft, reduces the friction and wear when the steering shaft rotates, makes the steering wheel easy to operate, prolongs the service life of the steering shaft, and obtains abrasive parts;

[0030] (2) One-time heating: put the abrasive piece in the heating furnace, heat it to 550°C at a rate of 5.5°C / min, and keep it warm for 35 minutes to make the external temperature rise rapidly, then naturally cool it down to 390°C, keep it warm for 45 minutes, and lower the steering shaft Then increase the temperature to 1000°C at a rate of 3.5°...

Embodiment 3

[0036] A method for preparing a wear-resistant and anti-fatigue automobile steering shaft, comprising the following steps:

[0037] (1) Grinding and polishing: Grinding and ultrasonic polishing the casted steering shaft, first use 800# sandpaper for grinding, and then use 1500# sandpaper for grinding, the frequency of ultrasonic polishing is 25kHz, and the polishing liquid is nanometer Silica sol polishing fluid smoothes the surface of the steering shaft, reduces the friction and wear when the steering shaft rotates, makes the steering wheel easy to operate, prolongs the service life of the steering shaft, and obtains abrasive parts;

[0038] (2) One-time heating: place the grinding piece in a heating furnace, heat it to 570°C at a rate of 6°C / min, keep it warm for 40 minutes, so that the external temperature rises rapidly, naturally cool down to 410°C, keep it warm for 50 minutes, and lower the steering shaft Then increase the temperature to 1030°C at a rate of 4°C / min, keep ...

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PUM

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Abstract

The invention mainly relates to the technical field of automobile part processing, and discloses a preparation method of a wear-resistant and fatigue-resistant automobile steering shaft. The method comprises the following steps of: grinding and polishing, primary heating, carbonitriding, secondary heating, quenching and film coating. According to the preparation method of the wear-resistant and fatigue-resistant automobile steering shaft, the surface of the steering shaft is treated on the basis of not changing the raw material of the steering shaft, so that the strength of the steering shaftcan be obviously improved, the wear resistance and fatigue resistance can be enhanced, the phenomenon that the steering shaft breaks down suddenly and influences the operation of a steering wheel canbe avoided, the service life of the steering shaft can be prolonged, and the driving safety of an automobile can be improved.

Description

technical field [0001] The invention mainly relates to the technical field of automobile parts processing, in particular to a preparation method of a wear-resistant and fatigue-resistant automobile steering shaft. Background technique [0002] With the development of science and technology and the continuous improvement of people's living standards, automobiles have increasingly become an indispensable tool. As a means of transportation, it can promote the rapid development of industry, and as a means of transportation can provide more convenience to people's lives; the steering shaft is the The function of the steering shaft is to transmit the steering torque that the driver acts on the steering wheel to the steering gear. Its upper part is fixedly connected with the steering wheel, and its lower part is connected with the steering gear. The steering shaft passes through the steering column tube and supports On the bearings and bushings in the column tube, some steering sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/32C21D1/18C21D1/60C21D9/28B24B1/00B24B1/04
CPCB24B1/00B24B1/04C21D1/18C21D1/60C21D9/28C23C8/32
Inventor 蒋仁平
Owner 含山县祥瑞运输有限公司
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