The inherent process characteristics of 3D printing with product high surface roughness lead to poor surface finish and surface quality of parts,and 3D printing post-treatment technology has become an indispensable part of the 3D printing process.Therefore,the post-treatment technologies of polymer 3D printing parts were introduced,which included mechanical grinding post-treatment,chemical post-treatment,laser polishing post-treatment and coating post-treatment.Using surface roughness as index,the fine finishing abilities of different post-treatment processes on different material surfaces were compared.Finally,in view of the problems and challenges facing the development of 3D printing post-treatment technology,the future research trend of the technolo-gy was prospected.
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