A Cold Stamping Process for Automotive Shock Absorber Lugs

An automotive shock absorber and cold stamping technology, applied in vehicle parts, transportation and packaging, etc., can solve the problems that stamping cannot be completed in one step, affect the forming and accuracy of the lugs, reduce the service life of the mold, and reduce the directional anisotropy coefficient. , The effect of improving the resistance strength and preventing impact cracks

Active Publication Date: 2019-06-11
盐城卓扬汽车部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The car shock absorber lug is an essential part to support the shock absorber, an important part of the car. Its performance directly affects the performance of the shock absorber, which also determines the comfort and safety of the car. Therefore, the processing technology of the lugs of automobile shock absorbers should not be underestimated. The existing processing methods also use cold stamping technology. However, due to the high hardness and relatively large yield strength of the steel plates used to make the lugs, it is difficult to form them. It cannot be done in one step, if the control is not good, it will directly affect the forming and precision of the lug, and cause a lot of loss to the mold, reduce the service life of the mold, and increase the manufacturing cost of the lug

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cold stamping process for a lug of an automobile shock absorber, comprising the following steps:

[0020] (1) Use a plasma cutter to cut the steel plate used for lug production into a size that exceeds 5% of the drawing, and polish the cutting periphery to obtain a smooth cutting edge, heat the cut piece to 600°C, and go through 2 low-temperature tempering The first treatment time is 6 seconds, the temperature of the cut piece is quickly reduced to 450°C, and after 40 minutes of heat preservation, it is cooled to 300°C by spraying water and cooled to room temperature after 15 seconds of stagnation. The yield strength of the cut piece obtained is uniform, without Anisotropy, high uniform elongation, low yield ratio, low work hardening;

[0021] (2) Soak the tempered cut pieces in the adsorption liquid for 2 hours. The adsorption liquid is composed of the following raw materials in parts by weight: 25 parts of oleic acid, 15 parts of glyceryl oleate, 17 parts of sodium...

Embodiment 2

[0029] A cold stamping process for a lug of an automobile shock absorber, comprising the following steps:

[0030] (1) Use a plasma cutter to cut the steel plate used for lug production into a size exceeding 7% of the drawing, and polish the cutting edge to obtain a smooth cutting edge, heat the cut piece to 650°C, and go through 2 low-temperature tempering Treatment, the first treatment time is 7 seconds, the cutting temperature is quickly reduced to 470 ° C, after 45 minutes of heat preservation, spray water to cool to 320 ° C, and cool to room temperature after 17 seconds of stagnation. Anisotropy, high uniform elongation, low yield ratio, low work hardening;

[0031] (2) Soak the tempered pieces in the adsorption solution for 2.5 hours. The adsorption solution is composed of the following raw materials in parts by weight: 27 parts of oleic acid, 16 parts of glyceryl oleate, 18 parts of sodium alkylbenzene sulfonate, 15 parts of polyacrylamide, 14 parts of nitrobenzene, 15...

Embodiment 3

[0039] A cold stamping process for a lug of an automobile shock absorber, comprising the following steps:

[0040] (1) Use a plasma cutter to cut the steel plate used for lug production into a size that exceeds 10% of the drawing, and polish the cutting edge to obtain a smooth trimming edge. Heating the cut piece to 700°C, and tempering at low temperature twice Treatment, the first treatment time is 8 seconds, the cutting temperature is quickly reduced to 500 ° C, after 50 minutes of heat preservation, spray water to cool to 350 ° C, and cool to room temperature after 20 seconds of stagnation, the yield strength of the obtained cuttings is uniform, without Anisotropy, high uniform elongation, low yield ratio, low work hardening;

[0041] (2) Soak the tempered cut pieces in the adsorption liquid for 3 hours. The adsorption liquid is composed of the following raw materials in parts by weight: 30 parts of oleic acid, 18 parts of glyceryl oleate, 19 parts of sodium alkylbenzene s...

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Abstract

The invention relates to the field of automobile part machining and discloses a cold pressing technology of an automobile shock absorber support lug. The cold pressing technology comprises the following steps: carrying out cutting and grinding on a steel plate used for manufacturing the support lug, preventing a die from being damaged, reducing stress and preventing impact cracks from occurring; further carrying out tempering treatment on a cut component twice so as to improve the resistance strength of the steel material, reduce the yield strength of the steel material, reduce the yield ratio of the cut component and facilitate one-step forming; and soaking the cut component in an absorbing solution and dragging freely moving electric charges together, form a net shape, so as to reduce an anisotropic coefficient in the plate surface of the steel plate and reduce great resistance brought by anisotropic difference; and increasing a clearance during pressing forming and increasing the power of a press, so that pressing forming is finished at a time, and the working efficiency is increased. Through one series of detail treatment methods, the obtained support lug has the advantages that the thickness is accurate and uniform, repeating conformity is great, the surface is smooth, scar-free and scratch-free, the inner part is free of cracks, and the service life of the die is prolonged.

Description

technical field [0001] The invention relates to the field of auto parts processing, in particular to a cold stamping process for lugs of an auto shock absorber. Background technique [0002] Stamping is a metal processing method, which is based on the plastic deformation of metals, using molds and stamping equipment to exert pressure on the sheet metal, so that the sheet metal is plastically deformed or separated, so as to obtain parts with certain shape, size and performance (Stamping). Sheet metal, mold and equipment are the three elements of stamping processing. Stamping is a metal cold deformation processing method. Therefore, it is called cold stamping or sheet metal stamping, or stamping for short. It is one of the main methods of metal plastic processing (or pressure processing), and it also belongs to material forming engineering technology. Compared with castings and forgings, stamping parts have the characteristics of thinness, uniformity, lightness and strengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/88C23G1/08C21D6/00
CPCB21D53/88C21D6/00C23G1/083
Inventor 程庆保张永根
Owner 盐城卓扬汽车部件有限公司
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