摘要
为了解决五轴机床直线插补过程中,机床抖动及进给轴速度与加速度不连续等实际问题,对五轴直线插补刀路转接光顺进行了研究。基于刀轴的球面坐标系与平面坐标系存在的数学关系,通过2个欧拉角表示刀轴矢量,将其转换为平面问题。针对刀位点与刀轴矢量,利用Bézier曲线对其同时进行转接光顺,提出了一种新的插补光顺思路。经过Bézier曲线转接光顺后的五轴直线插补路径,保证了直线轴和旋转轴速度与加速度没有突变。在模拟过程中共生成839个插补点,每个插补点所消耗的直接计算时间为0.186ms,能够满足实时性要求。在五轴龙门式雕铣机上进行验证,光顺后的速度和加速度没有超过最大约束值,验证了插补光顺思路的可行性。
In order to solve practical problems such as machine tool jitter and discontinuity of feed shaft speed and acceleration during the linear interpolation process of five-axis machine tools, the optical smoothness of five-axis linear interpolation tool path is studied.Based on the mathematical relationship between the spherical coordinate system and the plane coordinate system, the cutter axis vector is represented by two euler angles, which is transformed into a plane problem.A new idea of interpolation smoothing was proposed for both the cutter site and the cutter axis vector by using the Bézier curve.The Bézier curve is connected to the smooth five-axis linear interpolation path, which ensures that the velocity and acceleration of the straight axis and rotation axis are not changed.A total of 839 interpolation points were generated in the simulation process. The direct computation time consumed by each interpolation point was 0.186 ms, which could meet the real-time requirements.In the five-axis gantry engraving and milling machine, the speed and acceleration after smoothing did not exceed the maximum constraint value, and the feasibility of interpolation smoothing was verified.
作者
刘江
黄可
陶永德
丁仁华
LIU Jiang;HUANG Ke;TAO Yong-de;DING Ren-hua(Institute of Mechanical Engineering,ChangZhou Vocational Institute of Mechatronic Technology, ChangzhouJiangsu 213164,China)
出处
《组合机床与自动化加工技术》
北大核心
2019年第4期66-70,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
江苏省高等职业教育高水平骨干专业建设项目(苏教高[2017]17号)
常州机电职业技术学院院级课题(2017-zdkj-02)
关键词
五轴直线插补
刀路优化
BÉZIER曲线
球面坐标系
five-axis linear interpolation
tool path optimization
the bézier curve
spherical coordinate system
作者简介
刘江(1970—),男,江苏泰州人,常州机电职业技术学院教授,研究方向为智能制造等,(E-mail)czjxlj@163.com;通讯作者:黄可(1987—),男,江苏盐城人,常州机电职业技术学院硕士研究生,研究方向为数控技术,(E-mail)244193480@qq.com。
