(1) Plane parts
The characteristics of plane parts are that the machined surface can be parallel to the horizontal plane, perpendicular to the horizontal plane, and can also form a fixed angle with the horizontal plane. It is the simplest type of parts in CNC milling. Generally, it only needs to use the two-axis linkage or three-axis linkage of the three-coordinate CNC milling machine to process. During the machining process, the machined surface is in surface contact with the tool, and end mills or bull nose cutters can be used for roughing and finishing.
(2) Surface parts
The characteristics of surface parts are that the machining surface is a space surface, and during the machining process, the machining surface and the milling cutter are always in point contact. Surface finishing is mostly carried out with ball-end milling cutters.
