Surface post-treatment method for 3D printing copper alloy contact material

Abstract

The invention relates to the technical field of metal powder processing, and discloses a surface post-treatment method for a 3D printing copper alloy contact material. The surface post-treatment method comprises the following steps that S1, sand blasting grinding materials are sprayed out by sand blasting equipment to conduct sand blasting grinding on the surface of a copper alloy contact; S2, the copper alloy contact obtained after sand blasting and a cleaning tool are put into a PP liquid storage tank to be cleaned; S3, the surface is neutralized by using a degradable environment-friendly solvent; S4, rough polishing is conducted for 20-30 min at first, and then fine polishing is conducted three times through an Al2O3 and SiO2 ceramic abrasive material; S5, magnetic precision grinding is carried out, the frequency ranges from 20 Hz to 60 Hz, the time ranges from 60 min to 180 min, and the magnetic field exchange time ranges from 1 min to 3 min; and S6, vacuum cleaning and drying are conducted. The surface post-treatment method for the copper alloy contact can meet the requirements of the market on the appearance quality of the copper alloy contact, and has the advantages of low cost and high efficiency.

Description

technical field [0001] The invention relates to the technical field of metal powder processing, in particular to a surface post-treatment method for 3D printing copper alloy contact materials. Background technique [0002] The surface of copper and copper alloy products printed by 3D printing technology is relatively rough; in order to better solve the problem of surface quality of printed parts, this puts forward requirements for the surface post-treatment process of 3D printing technology products. [0003] For a long time, people have taken various measures to improve the surface quality of metal 3D printing parts, including replacing metal powders with smaller particle diameters and powder forms, constantly adjusting machine precision, and constantly exploring more high-quality and efficient post-processing processes. At present, the conventional technology is physical grinding and polishing, sandblasting, and the application of abrasive flow technology popular in recent...

AI Technical Summary

Problems solved by technology

At present, the conventional technology is physical grinding and polishing, sandblasting, and the application of abrasive flow technology popular in recent years, as well as the most commonly used machining process; grinding and polishing of 3D printing parts generally requires manual work due to the complexity of its structure. Grinding is extremely inefficient, which is not conducive to mass production; because it relies on manual or mechanical reciprocating motion, the operator has a high degree of fatigue, and it is easy to over-grind and cause parts to be deformed and scrapped; the comprehensive cost of machining surface treatment is high, It is not conducive to cost reduction; abrasive flow polishing technology has begun to be applied in the field of metal 3D printing metal parts polishing, and has solved the inner hole and complex outer surface polishing for many enterprises, but the metal dust after polishing is mixed in the abrasive, which affects the abrasive. Re-use, and soft abrasives remain on the surface of the parts, making it difficult to clean, etc.

[0004] The current existing technology is not applicable to the surface treatment of the original parts of the 3D printed copper alloy contact, and cannot meet the market demand; in view of this problem, it is urgent to provide a low-cost, high-efficiency surface post-treatment of the 3D printed copper alloy contact material The method meets the requirements of appearance quality and is suitable for the market demand of batch processing

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