| 自由曲面五轴加工刀轴矢量的运动学优化方法 |
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| 引用本文： | 罗明,吴宝海,李山,张定华.自由曲面五轴加工刀轴矢量的运动学优化方法[J].机械工程学报,2009,45(9). |
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| 作者姓名： | 罗明 吴宝海 李山 张定华 |
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| 作者单位： | 西北工业大学现代设计与集成制造技术教育部重点实验室,西安,710072 |
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| 摘 要： | 针对五轴加工中刀轴矢量变化过大导致加工误差较大和破坏零件表面加工质量的问题,提出采用运动学方法优化刀轴矢量.建立机床的运动学约束条件,并由此确定机床转动角速度可达区域作为刀轴矢量优化的约束条件.针对选定结构的机床,结合平底刀加工不发生过切的充要条件和被加工曲面沿行距方向的法曲率,给出初始后跟角的自动计算方法,并指出机床转动角度的变化相对于后跟角的变化是单调的.在得出切触点无干涉区域与机床转动角速度可达区域的基础上,从两个区域的交集中选取优化的刀轴矢量.如果两个区域的交集为空,则调整该点之前切触点的刀轴,从而使交集不为空.算例分析表明,所提出的运动学优化方法合理可行,能够使刀轴矢量变化均匀,充分发挥机床的性能.
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| 关 键 词： | 机床运动学 五轴加工 自由曲面 刀轴矢量优化 |
Five-axis Tool Orientation Optimization Based on Kinematical Method |
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| LUO Ming,WU Baohai,LI Shan,ZHANG Dinghua.Five-axis Tool Orientation Optimization Based on Kinematical Method[J].Chinese Journal of Mechanical Engineering,2009,45(9). |
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| Authors: | LUO Ming WU Baohai LI Shan ZHANG Dinghua |
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| Affiliation: | The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology;Ministry of Education;Northwestern Polytechnical University;Xi'an 710072 |
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| Abstract: | Quick change in the tool orientation between neighboring contact points can never be made possible in reality due to the physical limit on the velocity and acceleration of the rotary motions of machine tool,a kinematics based method is presented in this research to solve this problem.The presented algorithm will automatically generate an interference-free inclination angle for selected machine tool,and the rotation angle will increase or decrease with the inclination angle increment.After the interference-f... |
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| Keywords: | Kinematics of machine tool 5-axis machining Freeform surface Tool orientation optimization |
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