What is the source of milling force in precision machining

In precision parts processing, the milling process involves the interaction between the milling cutter and the workpiece, which consumes power. The milling force directly affects the generation of cutting heat and further affects tool wear, tool life, and the quality of the machined surface. In production, milling force is also a necessary basis for calculating machine power and determining clamping force. Therefore, studying the variation law of milling force and estimating milling force and milling power has practical significance.

There are two sources of milling force: one is the resistance generated by the elastic and plastic deformation of the cutting layer metal of the workpiece, the cutting layer metal, and the surface layer metal of the workpiece; The second is the frictional resistance between the milling cutter, chips, and the surface of the workpiece. Due to the continuous changes in the number of teeth, cutting thickness, and milling position involved in the milling process of precision parts, the magnitude, direction, and point of action of the cutting force are also constantly changing. For the convenience of analysis, the total milling force on a pair of load-bearing bodies (milling cutters and workpieces) is generally decomposed in a certain direction, and the changes in each milling component force are analyzed to further grasp the variation law of milling force.