机械科学与技术2024，Vol.43Issue(7)：1230-1237,8.DOI:10.13433/j.cnki.1003-8728.20230027
五轴线性刀路的局部能量光顺及奇异避免方法
Local Energy Smoothing and Singularity Avoidance Method of Five-axis Linear Toolpath
摘要
Abstract
Aiming at the problems existing in the current five-axis machining that the translation axis at the corner of the toolpath decelerates excessively and the angle of the rotation axis changes drastically in the singular area.This paper takes the AC dual-table five-axis machine tool as the research object and proposes a path optimization method that satisfies the kinematics constraints of the machine tool.Firstly,the method takes the maximum allowable offset before and after the smoothing of the tool center point as a constraint,and uses the corner vector and the double-chord bow height for modeling to seek the local energy optimal solution at the corner of the micro-line segment.Then the cutter axis vector points inside and at the edges of the singular range are planned again so that the end of the vector just bypasses the singular region on the unit sphere;thus the original machining characteristics are greatly preserved.Finally,the optimization effect is evaluated by the trigonometric function acceleration and deceleration control algorithm.The simulation results show that the path optimization method improves the average feed rate by 10.64%while the fitting deviation and bow height error do not exceed the allowable values,and can effectively avoid the occurrence of singularities in machining.Consequently,the proposed method has high theoretical significance and practical application value in improving the efficiency and quality of five-axis machining.关键词
五轴加工/局部能量光顺/奇异区域/运动控制Key words
five-axis machining/local energy smoothing/singular regions/motion control分类
信息技术与安全科学引用本文复制引用
陈良骥,武文义,李慧莹,唐津梦,魏子森..五轴线性刀路的局部能量光顺及奇异避免方法[J].机械科学与技术,2024,43(7):1230-1237,8.基金项目
广西自然科学基金项目(2021GXNSFAA220019) （2021GXNSFAA220019）
