A high-efficiency polishing method suitable for post-sintering type metal 3D printing

Abstract

The invention discloses a high-efficiency polishing method suitable for post-sintering type metal 3D printing, which comprises the following steps: using 3D printing technology to obtain printed parts; putting the obtained printed parts into a sintering furnace for pre-sintering; pre-sintering The final sintered parts are pre-polished according to their respective specification requirements; the pre-polished sintered parts are put into the sintering furnace for secondary sintering; the sintered parts after secondary sintering are subjected to secondary polishing. In the present invention, by performing pre-polishing and secondary polishing on the sintered parts, the mechanical force and polishing time required for polishing are significantly reduced, the mirror surface can be achieved in a shorter time, and the polishing efficiency and polishing integrity are improved. The economic cost is saved, and the practicability and industrial application popularity of the product are further improved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy technology and 3D printing technology, and specifically relates to a high-efficiency polishing method suitable for post-sintering type metal 3D printing. Background technique [0002] At present, the main manufacturing technology of metal 3D printing is to directly sinter the powder by laser. However, with the gradual maturity of powder metallurgy post-sintering technology, metal additive manufacturing technology can be divided into direct sintering and post-sintering types. Post-sintering technology is based on After the metal powder is bonded and formed in a certain way, it is post-processed and sintered to become a pure metal part. Generally, the original surface roughness of post-sintered metal 3D printing parts is Ra3-20um. For products with sliding contact requirements, high surface roughness is likely to cause product wear and poor touch, which reduces the practicability of the product. The...

AI Technical Summary

Problems solved by technology

Usually the original surface roughness of post-sintered metal 3D printing parts is Ra3-20um. For products with sliding contact requirements, high surface roughness will easily cause product wear and poor touch, which reduces the practicability of the product. Therefore, it is necessary to The sintered product is polished to reduce the surface roughness to obtain a mirror effect as much as possible. The surface roughness of the mirror is Ra0.03-0.1um

[0003] At present, most of the directly sintered prints are polished. Since the sintered prints have a certain original hardness, it increases the difficulty of polishing for prints with complex shapes and hardness above 100HV that are difficult to polish. May cause prints to be damaged during polishing, increasing material costs

Some automated mechanical polishing or manual polishing methods can polish most products in the industry to obtain a mirror effect, but because the printed parts are difficult to operate due to their special stacking traces, the appearance of the product will be easily deformed during the operation, and may even be damaged. The wax or other media in the polishing medium is polluted, resulting in a large amount of cleaning needs; and manual polishing often takes a lot of time, and further faces problems such as high working hours and high manpower requirements, making it difficult for printed parts to obtain cost in the industry Therefore, it is necessary to improve the polishing efficiency and polishing integrity of printed parts

Images