A kind of production technology of railway spring grinding silver bright material

Abstract

The invention discloses a production process for grinding silver bright materials of railway springs, which includes feeding, softening and annealing, rough straightening with a two-roller straightening machine, peeling with a peeling machine, fine straightening and polishing with a two-roller straightening machine, eddy current flaw detection, and sawing The process steps of cutting to length—coating with antirust oil—packaging. In the present invention, the combination of softening annealing and peeling by a peeling machine is used to increase the average diameter of the carbide particles in the hot-rolled bar, thereby effectively reducing the hardness, and then peeling it to control the removal amount of the tool, so that the hot-rolled bar It is not easy to disintegrate and improve the metal yield; the rough straightening of the two-roller straightening machine before the peeling process of the peeling machine improves the straightness of the hot-rolled bar, reduces the transitional cutting caused by the straightness, and reduces the wear of the tool. After the machine peeling process, the two-roller leveling machine is finely straightened and polished to correct the straightness problem caused by the tool touching the hot-rolled bar during the peeling process, and it is polished by an abrasive belt grinder to eliminate the damage to the silver bright material caused by tool cutting.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a production process for grinding silver bright materials for railway springs. Background technique [0002] With the development of the manufacturing industry, the requirements for the internal and external quality of raw materials are constantly improving, and spring materials are the first to bear the brunt, especially for the appearance size and surface defect control. There must be no work-hardening layer. To ensure quality, high-stress stabilizer bars are all made of spring steel and delivered in a silvery state. [0003] At present, the process of grinding silver bright materials for railway springs produced from black leather bars mainly adopts the production process of black leather bar peeling + calendering + grinding wheel grinding. The low degree of coordination makes it difficult to control the quality of the product, resulting in scratches on the surface o...

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a production process for railway spring grinding silver bright material, which adopts the combination of softening annealing and stripping machine peeling to increase the average diameter of carbide particles in the hot-rolled bar. So as to effectively reduce the hardness, and then peel it, control the removal amount of the tool to 0.7-1.2mm in the diameter direction, and the peeling tool rotates 6-10mm / rev, so that the hot-rolled bar is not easy to disintegrate, and the metal yield rate is improved; The process combination of two-roll leveler rough straightening and two-roll leveler fine straightening and rolling is adopted. The two-roll leveler rough straightening before the peeling process of the peeling machine improves the straightness of hot-rolled bars and reduces the straightness caused by straightness. The transitional cutting reduces tool wear, and after the peeling process of the peeling machine, the two-roller straightening machine is finely straightened and polished to correct the straightness problem caused by the tool touching the hot-rolled bar during the peeling process, and through five different The roughness of the abrasive belt grinder is used for polishing, realizing rapid processing from rough grinding to fine grinding, and eliminating the damage to silver bright materials caused by cutting tools

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