FANUC系统中实时前瞻的NURBS插补研究与实现  

Realizing Real-time Look-ahead NURBS Interpolation in FANUC System

作　　者：刘萍[1] 王民权[1] 范进桢[1] 赵秀婷[2] 

机构地区：[1]宁波职业技术学院机电工程系,宁波315800 [2]洛阳理工学院机械系,洛阳471023

出　　处：《机械科学与技术》2012年第5期791-795,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：浙江省教育厅科研项目(Y201018385)资助

摘　　要：在加工NURBS曲线时,为克服直线插补和圆弧插补的不足,可利用FANUC系统自身的NURBS插补功能实现NURBS曲线加工。为保证NURBS曲线的高速高精加工,利用伺服HRV2控制功能与CNC的实时前瞻控制相结合,通过调整预读前馈系数和速度增益参数方法改善机床的加工性能。实际刀具运动轨迹表明,该方案可改善伺服系统的响应和刚性,减少机床的加工误差并提高定位速度。To overcome the shortcomings of line interpolation and circular interpolation,we utilize the NURBS interpolation function of the FANUC system to carry out the machining of NURBS curve.In order to ensure the high-speed and high-accuracy machining of the NURBS curve,we combine the control function of the HRV2 servo system with the real-time look-ahead control function of CNC and improve the machining performance of the CNC by adjusting the look-ahead feedforward coefficient and the velocity gain parameters.The actual tool movement trajectories show that our new scheme can improve the response and rigidity of the servo system,reduce the machining errors of the CNC and increase its location velocity.

关 键 词：插补 NURBS 实时前瞻 预读前馈 速度增益 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]