平面类型的工件,在整形公差方面有不直度、不平度、不平行度、不垂直度等误差。平面工件的加工,精度不高的多半采用铣或刨,精度高的采用磨削、刮研和研磨。下面着重谈一谈铣刨加工产生整形误差的原因和防止的方法。不平度平面工件的不直度,是在平面上一定方向上的不平 Plane type of workpiece, the plastic tolerances are not straightness, roughness, non-parallelism, non-perpendicularity and other errors. Plane workpiece processing, accuracy is not high, mostly milling or planing, high precision grinding, scraping and grinding. The following focuses on the reasons for milling errors and shaping methods to prevent. Roughness The unevenness of a flat workpiece is uneven in a certain direction in the plane