基于定向距离理论的五轴加工刀具轨迹规划算法

发布时间：2018-05-24 21:46

本文选题：环形刀 + 自由曲面　；参考：《中国机械工程》2017年22期

【摘要】：针对环形刀五轴加工自由曲面的残留误差问题,在传统等残留高度算法的基础上,提出了一种基于定向距离理论的等最大残留高度刀具轨迹规划算法。首先根据微分几何理论计算已知刀触点的初始侧向行距,并在侧向行距方向进行偏置得到相邻刀触点;然后以基于定向距离理论的残高误差计算模型对相邻刀触点间的实际残高值进行计算;最后通过迭代计算规划出等最大残留高度的相邻刀具轨迹。如此循环,从而获得整个曲面的刀具轨迹。实验结果表明,相对于商用软件MasterCAM9.0,该算法在充分保证曲面加工质量的同时最大限度地减小了刀具轨迹的总长度,从而提高了加工效率。
[Abstract]:In order to solve the problem of residual error of free-form surface machined by five-axis annular cutter, a tool path planning algorithm with equal residual height based on directional distance theory is proposed on the basis of traditional algorithm of equal residual height. First, the initial lateral distance of the known cutter contact is calculated according to the differential geometry theory, and the adjacent cutter contact is obtained by bias in the lateral distance direction. Then the residual height error model based on the directional distance theory is used to calculate the actual residual height between the adjacent cutter contacts. Finally, the trajectory of the adjacent tool with equal maximum residual height is calculated by iterative calculation. In this way, the tool path of the whole surface is obtained. The experimental results show that compared with the commercial software MasterCAM9.0, the algorithm not only fully guarantees the machining quality of the curved surface, but also minimizes the total length of the tool path, thus improving the machining efficiency.
【作者单位】：湘潭大学机械工程学院;湘潭大学复杂轨迹加工工艺及装备教育部工作研究中心;
【基金】：国家自然科学基金资助项目(51375418) 湖南省自然科学基金资助项目(2017JJ4038)
【分类号】：TG659

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