High-strength spring steel wire machining method for automobile bearing spring

Abstract

The invention relates to a high-strength spring steel wire machining method for an automobile bearing spring. The raw materials comprise carbon, silicon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum and iron. According to the high-strength spring steel wire machining method for the automobile bearing spring, a wire rod made by mutual cooperation between various assemblys and content thereof is very excellent in decarburization layer depth, non-metallic inclusion, surface quality, mechanical property and the like; after the wire rod is subjected to acid pickling and phosphatizing, the cold drawing is conducted on the wire rod, and a semi-finished product meeting the outer diameter requirements is formed; then a finished product is made through quenching, tempering and other working procedures; the calibrating straight length, the quenching temperature, the tempering temperature and the turning speed during the drawing process are chosen carefully, so that the wire diameter stability, the non-circularity, the tensile strength, the face shrinking rate and the like of the finished product are all higher than those of a finished product prepared through a traditional oil-quenching tempering spring steel wire technology.

Description

technical field [0001] The invention belongs to the technical field of suspension spring processing, in particular to a method for processing high-strength spring steel wire for automobile suspension springs. Background technique [0002] Automobile suspension spring is an elastic element in the automobile suspension, which makes the elastic connection between the axle and the frame or the body, bears and transmits the vertical load, eases and suppresses the impact caused by the uneven road surface, and is more important in the independent suspension of the automobile. Coil springs are often used, especially in front wheel independent suspensions. The coil springs have the characteristics of no lubrication, no sludge, small space occupation and light weight. They are made of spring steel bars and can be made into etc. Pitch or variable pitch structure. The raw material of the suspension spring is spring steel wire, which can be divided into annealed steel wire, cold drawn s...

AI Technical Summary

Problems solved by technology

The raw material of the suspension spring is spring steel wire, which can be divided into annealed steel wire, cold drawn steel wire and oil quenched and tempered steel wire, the last of which is the steel wire that is cold drawn to the finished size on a continuous production line Heating, oil quenching and tempering, so that the steel wire structure is tempered sorbite, which has the characteristics of low internal stress and uniform performance. The specific production process is: wire setting, surface treatment, drawing and sizing, quenching heating, quenching oil Cooling, tempering heating, tempering water cooling, shearing, wire take-up and packaging and storage, among which the most important processing processes are surface treatment, drawing and sizing, quenching and tempering. The process has its own carefully designed process parameters, but there is still the possibility of further improvement

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