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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.
Subdivision surface can not only represent continuous geometric design model but also discrete processing model, which avoids the complicated intermediate process of model conversion. Subdivision surfaces not only have great advantages for the construction of complex parts with arbitrary topological structure, But also has great potential for development.Therefore, the algorithm of finishing tool path generation based on Loop subdivision surface is studied.Firstly, the subdivision of the finishing model based on chord length error is used to get the finishing model. Then, The finishing model is divided into a flat area and a non-flat area, and the processing of each area is performed in turn, and different cutter trajectory planning is implemented in different areas, thereby not only avoiding the insufficient surface precision or surface due to excessive data amount of the subdivision process, The problem of reducing the quality and the smooth calculation of the tool path of the relatively uniform residual height of the entire surface can be successfully obtained.Finally, the milling experiment is carried out to verify the feasibility of the algorithm.