复杂曲线、曲面高速加工中的最高恒定进给速度算法研究  

Algorithm for Max constant feed rate in the high speed curved surface machining

作　　者：华茂发[1] 王建红[1] 

机构地区：[1]南京工程学院自动化学院,南京211167

出　　处：《机械设计与制造》2009年第12期23-25,共3页Machinery Design & Manufacture

基　　金：江苏省高校自然科学基金研究项目资助(08KJD460010);南京工程学院校级科研基金项目(KXJ08064)

摘　　要：分析了曲线、曲面轮廓数控加工中,刀具路径曲线的几何特性与机床运动学的关系,建立了刀具沿曲线恒速进给的运动学方程;基于虚功原理推导出刀具路径几何特性、机床特性及进给电机特性之间关系的动力学方程;给出了在加速度、进给电机额定转矩及额定转速约束条件下,刀具沿曲线进给时的最高恒定进给速度算法。在满足约束条件范围内,选择合适的恒定进给速度,既能获得均匀的表面粗糙度,保证加工质量,又能获得较高的加工效率。Relationship between the geometric character of the tool path and the kinematics of the machining system in the curved surface machining by CNC machining has been analyzed,the kinematics model of the curved feeding of the tool at a constant feed rate built,and the kinematics formula which pre-sents the relationship among the geometric character of the tool path,character of the machining system and character of the feed motor is gotten based on principle of virtual work.Then the algorithm for the max con-stant rate at which the tool feeds along the curve under the constraint of the acceleration,the rating torque of the feed motor and the rating rotation speed is given.With adequate value within the constraint,high quality machining surface,high quality machining and high machining efficiency can be achieved in the machining.

关 键 词：高速数控加工 曲线路径 运动学及动力学 虚功原理 恒定进给速度 

分 类 号：TH12[机械工程—机械设计及理论] TG659[金属学及工艺—金属切削加工及机床]