Optimization of cutter posture based on cutting force prediction for five-axis machining with ball-end cutters
Optimization of cutter posture based on cutting force prediction for five-axis machining with ball-end cutters
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DOI：
10.1007/s00170-014-6719-1
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
L. Geng;Li-Yu Daisy Liu;Kui Liu
中科院分区：
文献类型：
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作者：
L. Geng;Li-Yu Daisy Liu;Kui Liu
在五轴加工工艺规划中，关键问题是刀具姿态（方位）的确定。本文提出了一种基于仿真的方法来确定产生最小偏转切削力的刀具姿态。该方法适用于精加工过程，其中只有刀具的球部分将与工件啮合。对于球头铣刀，随着刀具姿态的变化，刀具与工件之间的接合区域的形状保持不变。只有刀具表面上的啮合区域的分布会发生变化。基于此原理，提出了一种刀位间啮合信息的转换方法，消除了对不同刀位进行重复啮合计算的需求。因此，不同刀具姿态的切削力计算的计算量大大减少，这使得我们能够部署进化算法，以合理的计算成本搜索最佳刀具姿态。
In process planning for five-axis machining, the key issue is the determination of cutter postures (orientations). In this paper, a simulation-based method is proposed to identify cutter postures that produce minimum deflection cutting force. The method applies to the finish machining process, where only the ball part of the cutter will be engaged with the workpiece. For ball-end cutters, with change of cutter postures, the shape of the engagement region between the cutter and workpiece remains the same. Only the distribution of the engagement region on the cutter surface will change. Based on this principle, a method to transform engagement information between cutter postures is proposed, to eliminate the demand for repeated engagement calculation for different cutter postures. As a result, the computational loads of cutting force calculation for different cutter postures are greatly reduced, which enables us to deploy evolutionary algorithms to search for the optimal cutter posture at a reasonable computational cost.