三坐标数控加工的非均匀有理B样条适应性速度进给  

The Non-Uniform Rational B-Splines (NURBS) Feedrate Adaptation for 3-Axis Computer Numerical Control (CNC) Machining

作　　者：王宇晗[1] 刘康[1] 李宇昊[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《上海交通大学学报》2005年第S1期163-167,共5页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2002AA424042-2)

摘　　要：针对当前普遍采用的恒定进给速度的非均匀有理B样条(NURBS)插补方法存在的矢高误差和进给率波动过大的问题,提出了两种NURBS插补方法控制矢高误差的方法和恒定材料去除率的方法.第1种方法能够把矢高误差控制在较低的范围内,提高了加工精度;第2种方法把矢高误差限定在了更低的范围内,并且实现了材料去除率的恒定,从而提高了加工质量,延长了刀具的使用寿命.The interpolator of constant feedrate is widely used in today s NURBS interpolator, which would cause big chord error and feedrate fluctuation. To solve this problem, this paper proposed two NURBS interpolator methods: the interpolator of controlling chord error and the interpolator for constant material removal rate. The former can confine the chord error in a lower range, which can improve the machining accuracy; the latter can confine the chord error in a much lower range. More important, it can make the...

关 键 词：非均匀有理B样条 计算机数控 插补 矢高误差 材料去除率 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]