Processing technology for small-diameter quenched spring

Abstract

The invention relates to a processing technology for a small-diameter quenched spring. A spring is plated with cadmium through steps of quenching, degreasing, scale loosening, activation and cadmium plating sequentially, the spring is subjected to scale loosening in sodium nitrite and sodium hydroxide solutions regularly and quantitatively within a certain period of time, the oxide scale removal rate of the spring is increased, the tensile strength of the spring is improved, the percent of pass of coating coverage is ensured to be increased, and the service life of the spring is prolonged.

Description

technical field [0001] The invention relates to a small-diameter quenching spring processing technology, which belongs to the field of processing technology. Background technique [0002] As a component, springs are widely used in aviation, aerospace and navigation and other machinery manufacturing industries. The spring materials can be quenched before use to further improve the tensile strength, which has reached higher requirements. During the quenching process of the spring in the air furnace, the surface A thick oxide scale is formed, and the activation treatment before electroplating cannot remove the oxide scale, which affects the quality of electroplating and reduces the service life of the spring. The existing technology mostly adopts the method of spraying corundum sand to remove the scale, which is easy to operate and has a good cleaning effect. However, the spring with a small diameter of the spring wire is affected by the force of the high-speed sand flow during...

AI Technical Summary

Problems solved by technology

[0002] As a component, springs are widely used in aviation, aerospace and navigation and other machinery manufacturing industries. The spring materials can be quenched before use to further improve the tensile strength, which has reached higher requirements. During the quenching process of the spring in the air furnace, the surface Thick oxide skin is formed, and the activation treatment before electroplating cannot remove the oxide skin, which affects the quality of electroplating and reduces the service life of the spring

The existing technology mostly adopts the method of spraying corundum sand to remove the scale, which is easy to operate and has a good cleaning effect. However, the spring with a small diameter of the spring wire is affected by the force of the high-speed sand flow during the sandblasting process, and is easily deformed, reducing the Its load capacity makes it unable to achieve the expected effect, especially the tension spring is more prone to deformation, and once deformed, it cannot be corrected

The scrap rate in aviation production is extremely high, which not only wastes materials, but also poses certain safety hazards to the normal use of aircraft