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Processing method of small-diameter thick-walled tubes for automobile shock absorbers

A technology of automobile shock absorber and processing method, which is applied in the processing field of small-diameter thick-walled pipes, can solve problems such as uneven wall thickness of wall pipes, wall thickness reduction, etc., to improve uneven wall thickness and eliminate severe reduction Wall, the effect of improving dimensional accuracy

Inactive Publication Date: 2016-11-16
海盐三鑫钢管有限公司
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AI Technical Summary

Problems solved by technology

The cylinder is a small diameter thick-walled tube. The standard requires the wall thickness tolerance accuracy to be ±12.5% ​​or ±0.40mm. With the development of science and technology, the precision requirements for the cylinder are getting higher and higher. However, in the production process, the thick-walled It is a technical problem to require the pipe size accuracy to be ±0.15mm, especially the coaxiality is required to be below 0.30. This is because the existing processing method can easily lead to uneven wall thickness of the wall pipe, and the wall thickness is easy to appear in the cold drawing process. severe wall reduction

Method used

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Embodiment Construction

[0021] A method for processing a small-diameter thick-walled pipe for an automobile shock absorber, comprising the following steps:

[0022] Step 1: Round steel perforation: use the processing method of positioning the center hole for perforation processing, and process an inverted cone-shaped hole at the center of the round steel. When the round steel comes out of the heating furnace for perforation processing, the perforated head will fall into the inverted cone-shaped hole. Center positioning, processing the rough steel pipe;

[0023] Step 2: Remove the head and tail: check whether the rough steel pipe is qualified, and then cut the head and tail of the rough steel pipe;

[0024] Step 3: pickling and phosphating treatment: put the cut rough steel pipe into the sulfuric acid tank with cloth tape, and turn the steel pipe in the sulfuric acid tank for 3 to 4 times, so that the sulfuric acid can enter the inner wall of the steel pipe smoothly, and then carry out pickling , con...

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Abstract

The invention provides a processing method for a small-pipe-diameter thick-wall pipe used for an automobile shock absorber. The processing method comprises the following steps: (1) carrying out round steel punching; (2) removing a head and a tail; (3) carrying out pickling phosphating; (4) carrying out cold rolling processing; (5) carrying out intermediate heat treatment; (6) heading and drilling holes; (7) carrying out secondary pickling phosphating; (8) carrying out cold-drawing processing; (9) straightening; (10) carrying out rust-proof processing to form a finished product. The uneven wall thickness of the pipe wall can be improved, a phenomenon of severe wall reduction, which always appears, of a steel pipe in the cold rolling processing can be eliminated, and the dimensional accuracy of the thick-wall pipe is improved.

Description

technical field [0001] The invention relates to a processing method for a small-diameter thick-walled pipe used in automobile shock absorbers. Background technique [0002] In order to quickly attenuate the vibration of the frame and body and improve the ride comfort and comfort of the car, the suspension system of the car is generally equipped with a shock absorber, and the two-way acting barrel shock absorber is widely used in the car. The shock absorber is a vulnerable part in the use of the car. The quality of the shock absorber will affect the stability of the car and the life of other parts. The cylinder is an important part of the shock absorber, and the quality of the cylinder directly Affect the use of shock absorbers. The cylinder is a small diameter thick-walled tube. The standard requires the wall thickness tolerance accuracy to be ±12.5% ​​or ±0.40mm. With the development of science and technology, the precision requirements for the cylinder are getting higher ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C23F17/00
CPCB23P15/00
Inventor 金浪平朱金明沈春峰
Owner 海盐三鑫钢管有限公司
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