Quick coating removing method of coating thermal forming steel

Abstract

The invention discloses a quick coating removing method of coating thermal forming steel. The quick coating removing method comprises the steps that to-be-processed coating thermal forming steel is fixed; a spraying gun connected with a high-pressure water pipe is aligned to a part, on which a coating is to be removed, of the coating thermal forming steel; high-pressure water flow is introduced into the spraying gun, and mobile spraying is carried out on the surface coating of coating thermal forming steel; and the surface of the coating thermal forming steel is removed by 25-55 micrometersinthe thickness direction, and coating metals are removed. The quick coating removing method has the beneficial effects that 1, through technological optimization, the coating of the coating thermal forming steel can be quickly removed, and the bottleneck problem that welding technology efficiency of the thermal forming steel is restrained is solved; 2, the removing speed can reach 4 m / min to 10 m / min while removing precision is guaranteed, and compared with the prior art, the quick coating removing method is high in working efficiency and is suitable for large-scale production manufacturing enterprises; and 3, one-time investment cost is low, and technological process cost is lower than that of other coating removing manners.

Description

technical field [0001] The invention relates to a method for removing a coating on a metal surface, in particular to a method for quickly removing a coating on hot-formed steel with coating. Background technique [0002] Thermoformed steel, represented by 22MnB5, is the main material for thermoforming process of auto parts. Hot-formed steel has good formability at high temperatures; at the same time, it can form a high-strength martensitic structure after high-temperature quenching. Under the requirements of lightweight and high reliability of automobiles, the market application prospect is very broad. The surface of the early thermoforming steel has no coating, and the surface of the steel is easy to be oxidized at high temperature during the thermoforming process. It is necessary to add argon protection in the mold cavity and shot peening after thermoforming. Argon protection and shot peening add complexity and cost to the thermoforming process. European patent EP0971044...

AI Technical Summary

Problems solved by technology

Traditional methods for removing coatings on hot-formed steel include chemical reagents and mechanical scraping. The problems with traditional methods are low production efficiency and insufficient processing stability, which are not suitable for large-scale production.

Chinese patent CN 101426612 proposes a method of using pulsed laser to remove the coating. This method has good stability and fast removal speed, but the cost of the laser is high and the initial investment is large, which is contrary to the current research and development requirements of low-cost manufacturing.

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