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首页> 外文期刊>International Journal of Production Research >Combining physical shell mapping and reverse-compensation optimisation for spiral machining of free-form surfaces
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Combining physical shell mapping and reverse-compensation optimisation for spiral machining of free-form surfaces

机译：将物理壳映射和反向补偿优化相结合，可对自由曲面进行螺旋加工

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摘要

Machining of free-form surfaces has an important role in industrial manufacturing, but conventional tool-path generation strategies for free-form surfaces machining have the drawbacks of serious flattening distortion and poor tool-path continuity. Therefore, a novel method is developed to generate a spiral tool path for the machining of free-form surfaces by improving surface-flattening distortion and tool-path continuity. First, physical shell mapping is presented to flatten a free-form surface into a plane, which takes stretching energy, bending energy, and global energy into account. Then, the spatial spiral polyline is rounded to generate a spiral path by proposing reverse-compensation optimisation. Therefore, the free-form surfaces can be quickly flattened with less distortion, remaining free of overlap, and can in addition be machined at high speed along a C-2 continuous spiral tool path. Further, the flattening error, tool-path length, mean curvature, mean scallop-height error of the spiral path, machining time and surface roughness are obviously reduced. Finally, simulation results are given to show the effectiveness and feasibility of the presented strategy.
机译：自由曲面的加工在工业制造中具有重要作用，但是用于自由曲面加工的常规刀具路径生成策略具有严重的扁平变形和不良的刀具路径连续性的缺点。因此，开发了一种新颖的方法以通过改善表面平整变形和工具路径的连续性来生成用于加工自由曲面的螺旋工具路径。首先，提出了物理壳体贴图，将自由形式的表面平坦化为一个平面，该平面考虑了拉伸能量，弯曲能量和全局能量。然后，通过提出反向补偿优化来对空间螺旋折线进行舍入以生成螺旋路径。因此，自由曲面可以以较小的变形迅速变平，保持无重叠，并且可以沿C-2连续螺旋刀具路径高速加工。而且，平整误差，刀具路径长度，平均曲率，螺旋路径的平均扇贝高度误差，加工时间和表面粗糙度均明显降低。最后，仿真结果表明了该策略的有效性和可行性。

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