切削力, 自由曲面, 切削力基本恒定约束, 进给率优化

According to the milling characteristics of ball-end milling cutter, a mechanics model of milling force was established. Using empirical formula, the feed rate optimization of NC code for machining free-form surface was realized under constraint of nearly constant cutting force,so as to decrease the fluctuation of cutting force. Thus, the machining quality and efficiency of part were improved and the service life of cutting tool was prolonged. Moreover, tool breaking, stab injuries of workpiece caused by tool breaking and other phenomena can be avoided. Finally, a prototype system under constraint of nearly constant cutting force was set up and an example was given to verify the effectiveness of the method. 