软质印章石抛光工艺

Polishing Technology of Soft Seal Stone

为了提升软质印章石的加工质量,在不同型号砂纸和溶胶-凝胶(SG)抛光膜上磨抛巴林石、高山石、芙蓉石3种印章石,探讨研磨盘和载物盘的转动方向、转速,加工压力,加工时间等工艺参数及工艺路线,并确定每道工序的最大光泽度值,以及印章石表面形貌和粗糙度之间的关系.结果表明:最终优化工艺的研磨盘、载物盘分别以300,120 r·min^-1同向转动,加工压力为15 MPa;最佳工艺路线是通过在400#砂纸半精磨、在2000#砂纸的精磨和在SG抛光膜上抛光,使印章石表面光泽度达到50以上,粗糙度在100 nm左右,表面形貌在放大100倍时无明显划痕.

In order to improve the processing quality of soft seal stone,the processing technology was studied.Three kinds of seal stones:Balin Stone,Gaoshan Stone and Furong Stone were polished on different types of sandpaper and sol-gol(SG)polishing film.The technological parameters covered the direction and speed of grinding disc and loading disc,the processing pressure,the processing time and processing routes.In addition,the maximum glossiness of every step and the relationship between the surface topography and roughness of the seal stones are determined.The result shows that the grinding disc and loading disc are rotated in the same direction at 300 r·min^-1 and 120 r·min^-1 respectively in an optimized processing.The corresponding processing pressure is 15 MPa.The best processing route is semi finishing with 400#sandpaper first,then finishing with 2000#sandpaper,and finally polishing on SG polishing film,which makes the surface glossiness of seal stones more than 50,the roughness about 100 nm,and the final surface without obvious scratches when magnified 100 times.