Loop细分曲面精加工刀具轨迹生成

发布时间：2018-06-17 01:24

本文选题：CAD/CAM + 精加工　；参考：《北京航空航天大学学报》2015年04期

【摘要】：细分曲面既能表示连续的几何设计模型也能表示离散的加工模型,避免了模型转换的复杂中间过程.细分曲面除了对于构造具有任意拓扑结构的复杂零件具有巨大的优势外,对于数字化制造也极具发展潜力.因此,对基于Loop细分曲面的精加工刀具轨迹生成算法进行了研究.首先利用基于弦长误差的自适应插值Loop细分得到精加工模型;然后利用等斜率跟踪法将精加工模型分割为平坦区域和非平坦区域.对各个区域依次进行处理,不同区域实施不同的刀具轨迹规划.据此,既避免了因细分过程数据量过大而导致的曲面精度不足或表面质量降低的问题,又可顺利计算整张曲面相对均匀残留高度的刀具轨迹.最后,为验证该算法的可行性进行铣削加工实验.
[Abstract]:The subdivision surface can represent both the continuous geometric design model and the discrete machining model, thus avoiding the complicated intermediate process of model transformation. In addition to the advantages of subdivision surfaces in constructing complex parts with arbitrary topological structures, subdivision surfaces also have great potential for digital manufacturing. Therefore, the algorithm of tool path generation based on Loop subdivision surface is studied. Firstly, the finishing model is obtained by adaptive interpolation Loop subdivision based on chord length error, and then the finishing model is divided into flat region and non-flat region by using the equal-slope tracking method. Each region is processed in turn, and different regions implement different tool path planning. Based on this, the problem of surface accuracy or surface quality degradation caused by too large amount of data in the subdivision process is avoided, and the tool path with relatively uniform residual height of the whole surface can be calculated successfully. Finally, milling experiments were carried out to verify the feasibility of the algorithm.
【作者单位】：北京航空航天大学机械工程及自动化学院;
【基金】：国家自然科学基金资助项目(61170198) 中央高校基本科研业务费资助项目(YWF-14-JXXY-19)
【分类号】：TP391.72;TG659

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