研抛力对复杂曲面研抛表面质量影响的研究

Research on the Influence of Lapping and Polishing Force on Surface Quality of Complex Curved Surface

复杂曲面研抛加工过程中,通过控制研抛力的方法对工件进行研抛加工,根据研抛去除量确定研抛时间,能够实现对待加工表面的确定性研抛加工。在研抛加工过程中,当研抛力存在误差时,会影响机床的定位误差、加工过程中的热以及研抛头的受力变形,研抛表面精度也会因此受到影响。为了获得精度更高的工件研抛表面,需要对研抛力对工件表面精度的影响进行研究,文中通过对K9玻璃球面反射镜进行研抛加工,分析了加工过程中不同的研抛压力对加工表面质量的影响,最终确定了最优研抛压力区间为[5,7]N,使研抛表面粗糙度值由Ra0.1μm降低到Ra0.008μm左右。

During the process of complex surface polishing, the workpiece is polished by controlling the polishing force,and the polishing time is determined according to the polishing removal amount, and the deterministic polishing processcan be realized. In the polishing process, polishing force error will affect the positioning error of the machine, the heatduring processing and the polishing head deformation, polishing surface accuracy will be affected. In order to obtain thepolished surface with higher precision, the influence of the polishing force on the surface precision of the workpiece isstudied. The effect of different polishing pressure on the surface quality of the processing surface is analyzed bypolishing the K9 glass spherical mirror. The optimal polishing pressure interval is [5,7]N, and the polishing surfaceroughness value is decreased from Ra0.1 μm to Ra0.008 μm.