在机械加工过程中,由于刀具相对被加工表面的运动、刀具和零件表面之间的摩擦,切屑的撕裂以及加工系统的振动、润滑等原因,使加工后的表面留下了许多各种形状的痕迹,这些痕迹一般都是微小的,通常用肉眼看不清楚,这种痕迹具有几何特征,故称为微观几何形状误差,或称为表面粗糙度。表面粗糙度对提高零件的配合性能和机器设备的性能、使用寿命,尤其 In the machining process, many different shapes are left on the machined surface due to the movement of the tool relative to the surface to be machined, the friction between the tool and the part surface, the chipping of the chip and the vibration and lubrication of the machining system Of the traces, these traces are generally tiny, usually with the naked eye can not see, this trace has the geometric characteristics, it is called the micro-geometric errors, or surface roughness. Surface roughness to improve the performance of parts and machinery performance and service life, especially