中文摘要：

针对球头铣刀的铣削特点,建立了铣削的力学模型。利用经验公式,在保持切削力基本恒定的约束下,对加工自由曲面的NC代码进行了进给率的优化,从而减小切削力的波动,提高数控加工件的质量和加工效率,延长刀具的使用寿命并避免刀具折损等现象。建立了在切削力基本恒定的约束下的加工优化原型系统,并用实例进行了验证。

英文摘要：

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.