金属手表外壳非牛顿流体磨盘抛光工艺参数研究

Study on Polishing Process Parameters of Non-Newtonian Fluid Millstone for Metal Watch Case

针对智能手表金属表壳手工抛光效率低、加工精度要求高的现状,提出采用非牛顿流体磨盘抛光方式进行工艺研究。通过对金属手表外壳进行非牛顿流体磨盘抛光工艺试验,研究抛光压力,抛光头转速,抛光时间,磨料粒径对表面粗糙度Ra,材料去除率MRR,光泽度G,以及工件表面形貌的影响规律。结果表明,当抛光压力为11.56 N,抛光头转速为1800 r/min,抛光时间为20 min,磨料粒径为0.05 μm时,获得最小表面粗糙度Ra值为20 nm,最大材料去除率MRR为151.47 nm/min,最大光泽度G为460 Gu,表面形貌良好无明显划痕产生,获得光滑镜面效果。

In view of the low efficiency and high precision requirements of manual polishing of metal watch case of smartwatch, a non-Newtonian fluid grinding disk polishing method was proposed. The in-fluence of polishing pressure, polishing head speed, polishing time, abrasive particle size on surface roughness Ra, material removal rate MRR, glossiness G, and surface morphology of the workpiece was studied by the non-Newtonian fluid polishing process test on the metal watch shell. The results show that when the polishing pressure is 11.56 N, the rotating speed of the polishing head is 1800 r/min, the polishing time is 20 min and the abrasive particle size is 0.05 μm, the minimum surface roughness Ra value is 20 nm, the maximum material removal rate MRR is 151.47 nm/min, and the maximum gloss is 460 Gu. The surface morphology is good without obvious scratches, and the smooth mirror effect is obtained.