关键词: 滚磨光整加工, 滚抛磨块, 表面微观形貌, 表面粗糙度

Abstract: To investigate the influence of the material and size of rolling grinding blocks on the machining effect of groove-type parts in rolling grinding finishing,eight types of rolling grinding blocks made of different materials and sizes were selected,including red G3P,white G3P,black G3P,red ceramic,white ceramic,and brown ceramic grinding blocks,as well as grinding blocks of different sizes,were used to process groove-type parts. The study investigated the effects of different materials and sizes of grinding blocks on the microstructure,surface profile,and surface roughness of the edges and surfaces of groove-type parts,while also analyzing the wear conditions of the grinding blocks. The results showed that after processing with black G3P grinding blocks,the edges of the test pieces were uniformly rounded,surface scratches were basically removed,the surface contour was flat,and the surface roughness was reduced to 0.19 μm,with a surface roughness reduction rate of 51 %,indicating superior processing results;after processing with white G3P grinding blocks,the edges of the test pieces were slightly rounded,and surface scratches remained;the processing effect of the red G3P grinding block was intermediate between the former two G3P grinding blocks;the brown ceramic grinding block experienced powder shedding during processing,resulting in poor surface processing effects on the test specimens;after processing with the white ceramic grinding block,the edges of the test piece were not fully rounded,and there were still noticeable scratches on the surface;after processing with the red ceramic grinding block,the edges of the test piece were significantly rounded,and the surface was basically free of scratches;the 2.0 mm black G3P grinding block produced better surface morphology on the test piece compared to other sizes of black G3P grinding blocks.

Key words: mass finishing, roll polishing block, surface microstructure, surface roughness