Method for improving surface cleanliness of spring

Abstract

The invention discloses a method for improving the surface cleanliness of a spring. The method comprises the following steps that demagnetizing is conducted for the first time, specifically, the spring is demagnetized through a demagnetizing machine; shot blasting is conducted, specifically, the spring is subjected to shot blasting through a shot blasting machine; heat treatment is conducted, specifically, the shot-blasted spring is tempered; demagnetizing is conducted for the second time, specifically, the spring is demagnetized through the demagnetizing machine; and hydrocarbon cleaning is conducted, specifically, the spring is cleaned through a hydrocarbon cleaning machine. According to the method, magnetism, residual stress and a surface oxidation layer, grease and dirt of the spring can be eliminated timely, and blind hole parts, concave parts, small gaps and other parts of springs and special-shaped golden parts are effectively cleaned; meanwhile, pollution and noise are avoided, batch assembly-line operation can be achieved, the machining efficiency is high, the cleaning quality is high, the requirement for the cleanliness standard is met; and meanwhile, damage to the spring is avoided, product performance is improved, the appearance requirement is met, a large amount of labor is saved, labor intensity is reduced, and the economic benefits are improved.

Description

technical field [0001] The invention relates to a cleaning method, in particular to a method for improving the cleanliness of the spring surface. Background technique [0002] Cleanliness refers to the degree to which parts, assemblies and specific parts of the complete machine are contaminated by impurities. The quality, size and quantity of impurity particles collected from the specified characteristic parts by the specified method are expressed; the cleanliness index has a direct relationship with the reliability of the product. At present, most manufacturers have set standards for cleanliness. [0003] Grease and dirt will adhere to the surface of the steel wire of the spring during normal production; a layer of oxide skin will adhere to the surface of the spring after heat treatment; the spring will be magnetic after grinding, which is easy to absorb iron-containing debris; and debris during parts transportation . The existing technology only uses ultrasonic cleaning,...

AI Technical Summary

Problems solved by technology

The existing process only uses ultrasonic cleaning, which has low efficiency, high noise and cannot be cleaned in large quantities, and the residual magnetism of the cleaned spring will absorb metal impurities during subsequent processing and transportation.

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