The finishing work emphasizes high precision and high quality, and it is recommended to use down milling. Because the cutting thickness of the cutters gradually decreases from the maximum to zero during the milling, the degree of work hardening is greatly reduced, and the degree of deformation of the parts is alleviated.

Thin-walled workpieces are deformed by the clamping during processing, even if finishing is difficult to avoid. In order to minimize the deformation of the workpiece, the pressing piece can be loosened before the finishing is reached to the final size, so that the workpiece can be freely restored to its original shape, and then slightly pressed, so that the workpiece can be clamped. According to the hand feeling, this can achieve the desired processing effect. In short, the point of application of the clamping force is preferably on the bearing surface, and the clamping force should be applied to the direction of the rigidity of the workpiece. Under the premise of ensuring that the workpiece is not loose, the clamping force is as small as possible.

When processing the cavity parts, try not to let the milling cutter directly into the parts like a drill bit when machining the cavity, which results in insufficient space for the milling cutter and the chip removal is not smooth, resulting in overheating, expansion and collapse of the parts. Unfavorable phenomena such as broken knife. First drill the hole with a drill of the same size or larger size as the milling cutter, and then mill with a milling cutter. Alternatively, the CAM software can be used to produce a spiral undercut program.