Technique for processing engine valve spring

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...