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Method of preparing lining for cars

A manufacturing method and bushing technology, applied in metal processing equipment and other directions, can solve the problems of stress concentration and cracks in the flanging process, and achieve the effect of improving the quality rate and service life

Inactive Publication Date: 2008-07-02
上海德真工贸有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for manufacturing a bushing for automobiles, which solves the problems of stress concentration and cracks at the corners of the existing flanging process by stretching

Method used

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  • Method of preparing lining for cars
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  • Method of preparing lining for cars

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Embodiment Construction

[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] A method for manufacturing a bushing for an automobile, comprising the steps of:

[0021] 1. Blanking: Blanking the steel plate EC with a blanking die and hydraulic equipment to obtain a round material A (see figure 2 );

[0022] 2. Stretching: Stretch the circular material A obtained in step 1 five times with stretching dies and hydraulic equipment with different stretching ratios to obtain a cylindrical part B with a flange (see Figure 7 ), wherein the cylindrical part B' with the flange edge obtained by stretching for the first time (see image 3 ) The stretching ratio is 1:1.3, and the cylindrical part B" with the flange edge obtained by the second stretching (see Figure 4 ) The stretching ratio is 1:1.1, and the cylindrical part ...

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Abstract

The invention relates to a manufacturing method of a vehicle bushing, comprising the following steps that: (1) blanking: a blanking die and a hydraulic device are used for blanking a steel plate EC, and a round material A is obtained; (2) drawing: the round material obtained by the step (1) is drawn by five times by drawing dies with different drawing ratio and the hydraulic device, and a cylindrical piece B with a flange edge is obtained; (3) punching: a cylinder bottom of the cylindrical piece B with a flange edge obtained by the step (2) is punched and cut by a punching die and the hydraulic device, and a part C is obtained; (4) shaping and trimming: the part C obtained by the step (3) is shaped by a shaping and trimming die, and the flange edge is punched and cut into the bushing with the dimension consistent with the demand. The invention solves the problems of a flanging technique that stress concentration and crack are existed at corners, thus improving the percent of pass and prolonging the service life of the parts.

Description

technical field [0001] The invention relates to a method for manufacturing an automobile part, in particular to a method for manufacturing an automobile bush. Background technique [0002] see figure 1 , the height of the automotive bushing is 17mm, the tolerance is 0 to 0.1μm, the diameter of the inner hole is Φ8, and the bottom edge has a flange edge with a diameter of Φ24. Such parts are generally obtained by flanging tubular parts. With such a process method, the stress at the corner of the flange and the pipe body is relatively concentrated, and when the flange is turned, hidden cracks or obvious cracks are prone to appear at the corner, resulting in a decrease in the authenticity rate of the entire bushing and a shortened service life. . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for manufacturing an automotive bush, which solves the problems of stress concentration and cracks at the corners...

Claims

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Application Information

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IPC IPC(8): B21D35/00B21D22/20B21D28/24B21D19/00B21D53/10
Inventor 蔡海荣陆耀明李海华
Owner 上海德真工贸有限公司
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