A kind of manufacturing method of automobile leaf spring

A technology of automobile plate and leaf spring, which is applied in the field of automobile preparation, can solve the problems of serious environmental pollution, easy aging and falling off, and not resistant to wear, and achieve the effects of reducing energy consumption, avoiding deformation or cracking, and reducing energy loss

Active Publication Date: 2022-02-01
四川丰元机械制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) The automobile leaf spring is a multi-layer plate composite structure with high weight and increased energy consumption during loading and operation
At present, the automobile leaf spring is mainly anti-corrosion coating (or paint). The thickness of the coating is more than several hundred microns, which is relatively thick, but it is not wear-resistant and easy to age and fall off.
At the same time, there are polluting gases, dust and other emissions during the paint coating process, which seriously pollutes the environment.

Method used

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  • A kind of manufacturing method of automobile leaf spring
  • A kind of manufacturing method of automobile leaf spring

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preparation example Construction

[0031] The invention provides a technical solution: a method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium and nickel elements, comprising the following steps:

[0032] Step S1, spring steel is forged to obtain a billet; melted in a vacuum electric furnace, then electroslag remelted under the protection of an inert gas, and then hot forged into a billet (initial forging temperature 1200°C, final forging temperature 1050°C);

[0033] Step S2, hot-rolling the spring steel billet into an automobile leaf spring steel plate with variable cross-section characteristics, and the hot-rolling temperature is 1200°C;

[0034] Step S3, performing ear rolling; keeping the leaf spring in a furnace at 1050° C. for 5-10 minutes, and then performing ear rolling;

[0035] Step S4, constant temperature treatment; the leaf spring after the ears are directly put into a heat treatment furnace at 860°C fo...

Embodiment 1

[0048] A method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium, and nickel elements. The mass percentages of the spring steel billet components are: carbon C: 0.48%; silicon Si: 1.4% Manganese Mn: 0.80%; Molybdenum Mo: 0.15%; Vanadium V: 0.10%; Chromium Cr: 0.2%; Nickel Ni: 0.1%; Copper Cu: 0.08%; Aluminum Al: <0.09%; Phosphorus P: 0.009%; the balance is iron Fe. Weigh the cumulative sum of the above elements to be 100%, smelt in a vacuum electric furnace, and then go through electroslag remelting under the protection of inert gas, and then hot forge into billets (initial forging temperature 1200°C, final forging temperature 1050°C), take the forged and formed Spring steel blanks for automobile leaf springs are placed in a medium-frequency induction furnace and heated evenly to 1200°C, and then bent and molded on a die forging machine to obtain the radian and variable section size r...

Embodiment 2

[0052] A method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium and nickel elements. The mass percentages of the spring steel billet components are: carbon C: 0.49%; silicon Si: 1.48% ; Manganese Mn: 0.85%; Molybdenum Mo: 0.16%; Vanadium V: 0.12%; Chromium Cr: 0.23%; Nickel Ni: 0.12%; Copper Cu: 0.09%; P: 0.008%; the balance is iron Fe. Weigh the cumulative sum of the above elements to be 100%, smelt in a vacuum electric furnace, and then go through electroslag remelting under the protection of inert gas, and then hot forge into billets (initial forging temperature 1200°C, final forging temperature 1050°C), take the forged and formed Spring steel blanks for automobile leaf springs are placed in a medium-frequency induction furnace and heated evenly to 1200°C, and then bent and molded on a die forging machine to obtain the radian and variable section size required for automobile leaf ...

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Abstract

The invention discloses a method for preparing an automobile leaf spring. The automobile leaf spring is manufactured by using a spring steel billet material containing molybdenum, vanadium and trace amounts of chromium and nickel elements. Spring steel plate, rolled lugs, constant temperature treatment, water cooling and quenching, air cooling, surface fine grinding, shot blasting treatment, gas co-infiltration, coating, and finished product after drying. This invention uses the waste heat repeatedly after the hot rolling process with the help of a constant temperature device Complete the forming and heat treatment of the leaf spring, reduce the heating time, and greatly reduce the energy loss. In the heat treatment process, water is used as the cooling medium, which reduces the environmental pollution problem. Cost reduction, improved surface quality of leaf springs, increased corrosion resistance and fatigue properties.

Description

technical field [0001] The invention relates to the technical field of automobile preparation, in particular to a method for preparing an automobile leaf spring. Background technique [0002] Automobile leaf spring is the most traditional elastic element in automobile suspension system. It has the advantages of good reliability, simple structure, short manufacturing process, low cost and greatly simplified structure. Mainly made of spring steel. The disadvantages of prior art manufacturing automobile leaf springs are as follows: [0003] 1) High energy consumption and serious environmental pollution in the production process. It is mainly reflected in the fact that the variable cross section needs to be heated once, the coil ear needs to be reheated once, and the quenching needs to be reheated to a high temperature again. Repeated heating for several times, the energy loss is large; in addition, the domestic leaf spring quenching medium is oil quenching, when tempering It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/02C21D1/18C23C8/28C23C30/00B23P15/00
CPCC21D9/02C21D1/18C23C8/28C23C30/00B23P15/00
Inventor 崔国栋余佑祥崔建强张程菘陈大志
Owner 四川丰元机械制造有限公司
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