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Technique for processing engine valve spring

A technology of engine valve and processing technology, applied in the field of spring processing, can solve the problems of high thermal relaxation resistance, large working temperature range of valve spring, etc., and achieve the effects of high thermal relaxation resistance, large working temperature range and reasonable process design

Inactive Publication Date: 2010-02-10
QIANJIANG SPRING HANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of large operating temperature range, thermal relaxation resistance, cleanliness requirements and high operating frequency of automobile valve springs, and provide a reasonable process, operating temperature range of 40-150 ° C, and operating frequency of 30 Hz Above, the fatigue life is more than 23 million times, and the engine valve spring processing technology with high cleanliness

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] The technical solutions of the present invention will be further specifically described below through examples.

[0019] In this embodiment, the linear spring material is selected, the surface has no scratches, and the chemical composition and metallographic structure are randomly inspected in batches.

[0020] Qualified raw materials enter cold forming, and 100% pass the laser identification marking system. For materials with defects, the program setting can be automatically converted into a lapping process. According to the position and size of the material defect 2, it can be cut by 1 or 2 laps. After forming, the length is self-checked and sorted. Of course, the length after merging is definitely unqualified, and unqualified products will be processed separately.

[0021] The product with the molding certificate is annealed at a temperature of 400°C for a holding time of 40 minutes. After annealing, the section is ground on the automatic chamfering machine, and the...

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Abstract

The invention relates to the field of spring processing technique, in particular to a technique for processing an engine valve spring. The technique includes inspection of raw materials, self inspection of cold forming flaw detection length, 25 to 60 minutes of annealing under the temperature from 250 to 480 DEG C and cross section grinding; the mode of automatic working of the grinding head of apower drive grinding wheel is used for internal and external chamfering grinding, the secondary shot peening technology with the gradual upgrade from thickness to thinness is adopted, 100 percent of demagnetization is carried out, and the thermal forced compression technology is carried out at the temperature from 100 to 300 DEG C under the pressure from 2 to 20 Mpa; loading selection is carried out according to the requirements of different loading sections; and FUCHS rust-preventative oil immersion is carried out, and finally finished products are packed and then are stored.

Description

technical field [0001] The invention relates to the technical field of spring processing, in particular to an engine valve spring processing technology. Background technique [0002] The widespread application of springs has diversified the types, structural forms and functions of springs. There are also many methods of spring production and spring processing, each with its own characteristics. [0003] For example, the patent number is ZL01114045.3 spring steel wire rod for direct drawing and its manufacturing method, which relates to a silicon-manganese spring steel wire rod for direct drawing and its manufacturing process. Evenly distributed fine flaky pearlite and a small amount of ferrite (or sorbite) structure are obtained after spring steel wire rolling. , the plasticity is fully improved, so that the hot-rolled wire rod can be drawn directly without annealing. [0004] Another example is that the Chinese application number is 200710135043.0 and the invention relat...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 张涌森
Owner QIANJIANG SPRING HANGZHOU CO LTD
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