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考虑最优方向匹配的高效走刀轨迹生成方法

金鑫 刘其广 吕杰 徐飞飞

金鑫, 刘其广, 吕杰, 徐飞飞. 考虑最优方向匹配的高效走刀轨迹生成方法[J]. 机械科学与技术, 2022, 41(8): 1211-1215. doi: 10.13433/j.cnki.1003-8728.20220030
引用本文: 金鑫, 刘其广, 吕杰, 徐飞飞. 考虑最优方向匹配的高效走刀轨迹生成方法[J]. 机械科学与技术, 2022, 41(8): 1211-1215. doi: 10.13433/j.cnki.1003-8728.20220030
JIN Xin, LIU Qiguang, LYU Jie, XU Feifei. An Efficient Tool Path Generation Method Considering Optimal-feed-direction Matching[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(8): 1211-1215. doi: 10.13433/j.cnki.1003-8728.20220030
Citation: JIN Xin, LIU Qiguang, LYU Jie, XU Feifei. An Efficient Tool Path Generation Method Considering Optimal-feed-direction Matching[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(8): 1211-1215. doi: 10.13433/j.cnki.1003-8728.20220030

考虑最优方向匹配的高效走刀轨迹生成方法

doi: 10.13433/j.cnki.1003-8728.20220030
基金项目: 

国家自然科学基金项目 91948203

详细信息
    作者简介:

    金鑫(1989-), 硕士, 研究方向为数控和运动控制技术, jinxin649@163.com

    通讯作者:

    刘其广, 高级工程师, 硕士, hebeiqig_liu@sina.com

  • 中图分类号: TG659

An Efficient Tool Path Generation Method Considering Optimal-feed-direction Matching

  • 摘要: 针对轨迹规划中依据等残留高度规则排列的轨迹往往偏离最优走刀方向的难题, 提出一种兼顾方向匹配与走刀行距的高效走刀轨迹生成方法。基于空间曲面与其参数域的对应关系, 采样得到不同节点处的最优走刀方向, 并结合双线性插值, 实现曲面上任意位置处最优走刀方向的快速计算。从最优方向匹配的需求出发, 以轨迹单位切向表征其实际方向, 建立与理想方向偏离最小的优化函数, 通过设定不同加工行距, 偏置得到目标轨迹的限制区间, 利用遗传算法, 搜寻得到目标轨迹的最优表达。算例仿真表明, 所提方法可在轨迹高效排布的基础上, 显著提高与最优方向的匹配度, 继而提升机床的切削性能。
  • 图  1  单点处最优方向选择

    图  2  参数域上的双线性插值

    图  3  轨迹的等残留高度原则偏置

    图  4  偏置生成优化区间

    图  5  栅格采样和离散方向场构建

    图  6  3种方法规划的轨迹

    图  7  3种方法的轨迹在不同刀位处的方向偏差

    图  8  3种轨迹的仿真加工结果

    表  1  轨迹信息汇总表

    轨迹类型 长度/ mm 均值/ (°) 中位数/ (°) 标准差/ (°) 最大值/ (°)
    图 6a) 6 031.71 2.81 1.77 3.16 19.49
    图 6b) 5 647.53 5.21 3.51 5.47 37.82
    图 6c) 6 299.74 92.87 94.11 11.97 121.12
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-19
  • 刊出日期:  2022-08-25

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