基于三角网格曲面映射的数控高速加工刀轨规划

发布时间：2018-04-15 07:18

本文选题：三角网格 + 网格单元　；参考：《计算机集成制造系统》2016年10期

【摘要】：为进一步改善数控加工曲面的表面质量,提出一种针对三角网格曲面的螺旋刀具数控加工轨迹规划方法,在充分考虑刀具轨迹的几何与动力学特性以及三角网格单元特性的基础上,有效减少了抬刀次数,保持了刀具轨迹的连续性。该方法从网格边界轮廓曲线上的刀触点开始逐层偏置,在参数域上对刀触点进行规划,并拟合成螺旋轨迹,将其逆映射到网格曲面上得到螺旋加工轨迹。与传统的截面法和环切法相比,该算法可以生成一条具有边界一致性、轨迹光滑连续的、无需多次进退刀的高质量螺旋加工轨迹。
[Abstract]:In order to improve the surface quality of NC machining surface, a NC machining path planning method for triangular mesh surface is proposed.On the basis of considering the geometric and dynamic characteristics of the tool path and the characteristics of the triangular mesh element, the times of lifting the tool are reduced and the continuity of the tool path is maintained.The method starts from the cutter contacts on the boundary contour curve of the grid, plans the cutter contacts in the parameter domain, and proposes to synthesize the helical trajectories, and then maps them to the mesh surface to obtain the spiral machining trajectories.Compared with the traditional cross section method and the ring cutting method, the algorithm can generate a high quality spiral machining trajectory with boundary consistency, smooth and continuous trajectory and no need for multiple advance and return cutters.
【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程研究中心;
【基金】：国家自然科学基金资助项目(51375418)~~
【分类号】：TG659

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