Surface roughness refers to the micro geometric characteristics with small spacing and valley peak composition on the machined surface. Geometric factors are analyzed from the micro geometry of the workpiece surface, the trajectory of the relative movement between the cutting edge and the workpiece, that is, the reflection of the cutting edge geometry on the workpiece surface, so that the machine tool forms the surface roughness C. because the machined surface is formed after cutting by the main and auxiliary cutting edges of the tool, the spiral area formed by the traces left on the machined surface when the two cutting edges feed relative to the workpiece, Residual area. The larger the residual area of the machine tool, the higher its height, and the greater the surface roughness value.
