A surface post-treatment method of 3D printing copper alloy contact material

Abstract

The invention relates to the technical field of metal powder processing, and discloses a method for post-processing the surface of a 3D printed copper alloy contact material; including the following steps: S1, making sandblasting equipment eject sandblasting abrasives to blast the surface of the copper alloy contact Grinding; S2. Put the copper alloy contacts and cleaning tools obtained after sandblasting into the PP liquid storage tank for cleaning; S3. Neutralize the surface with a degradable and environmentally friendly solvent; S4. First rough polishing for 20~30min, then Using Al 2 o 3 +SiO2 2 Ceramic abrasives are finely polished for 3 times; S5, perform magnetic precision grinding, the frequency is 20-60Hz, the time is 60-180min, and the magnetic field exchange time is 1-3min; S6, vacuum cleaning and drying; the copper alloy contact provided by the present invention The surface post-treatment method can meet the market's requirements for the appearance quality of copper alloy contacts, 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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