828D系统高精度公式曲线零件加工策略
2019-01-17
作者：赵科学1，2，刘业峰1，2，赵元1，2，陶林1，2，李康举1，陈经伟3
单位：1沈阳工学院辽宁省数控机床信息物理融合与智能制造重点实验室；2沈阳工学院机械与运载学院；3沈阳机床（集团）有限责任公司
摘要：数控车削中高精度的公式曲线加工通常使用等间距直线拟合的参数化编程。该方法在公式曲线轮廓与直线轮廓相接的临界位置加工，因临界点步长不能被整除而产生原理性误差，使刀具加工中产生过切或欠切，严重影响工件质量和使用寿命。为避免工件的过切和欠切，提出一种等间距步长参数化编程的强制赋值方法，极大提高了公式曲线的临界点加工精度，经验证，该方法正确。
关键词：高精度；非圆曲线；沈阳机床T2C；西门子828D；强制赋值
中图分类号：TG51；TH165 文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.01.016
Maching Strategy of High Precision Formula Curve Parts in 828D System
Zhao Kexue，LiuYefeng，Zhao Yuan，Tao Lin，Li Kangju，Chen Jingwei
Abstract:In NC turning, the parametric programming of equal distance straight line fitting is usually used in high precision formula curve processing.In this method, the critical position of the contour of the formula curve and the contour of the straight line is machined.Because the step of the critical point can not be rectified，the principle error is produced，which causes the overcut or undercut in the cutting tool processing，and seriously affects the quality and service life of the workpiece.In order to avoid overcutting and undercutting of workpiece，a compulsory assignment method for parametric programming with equal spacing step size is proposed in this paper.The processing accuracy of the critical point of the formula curve is greatly improved, and the method is proved to be correct.
Keywords:high precision；formula curve；SMTCL T2C；828D CNC；forced valuation method