Kinematical performance prediction in multi-axis machining for process planning optimization
Kinematical performance prediction in multi-axis machining for process planning optimization
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DOI：
10.1007/s00170-007-1001-4
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发表时间：
2006-06
期刊：
影响因子：
--
通讯作者：
S. Lavernhe;C. Tournier;C. Lartigue
中科院分区：
文献类型：
--
作者：
S. Lavernhe;C. Tournier;C. Lartigue
本文论述了在高速加工的背景下，在五轴铣削运动性能的预测模型。事实上，由于刀具轴方向带来的自由度，5轴高速铣削可以提高质量和生产率。通过考虑由所设置的机床/NC单元产生的运动学约束，可以在生产率方面有效地设置刀具轴取向。每个轴的能力以及NC单元功能可以表示为限制约束。该模型依赖于机床的关节空间中的每个轴的位移，并预测每个轨迹段的最限制轴。因此，可以执行刀具进给速度的计算，突出显示未达到编程进给速度的区域。这构成了轨迹优化的指标。通过实例说明了该模型的有效性。最后，该模型可用于优化工艺设计。
This paper deals with a predictive model of kinematical performance in 5-axis milling within the context of high-speed machining. Indeed, 5-axis high-speed milling makes it possible to improve quality and productivity thanks to the degrees of freedom brought by the tool axis orientation. The tool axis orientation can be set efficiently in terms of productivity by considering kinematical constraints resulting from the set machine tool/NC unit. The capacities of each axis as well as NC unit functions can be expressed as limiting constraints. The proposed model relies on each axis displacement in the joint space of the machine tool and predicts the most limiting axis for each trajectory segment. Thus, the calculation of the tool feedrate can be performed, highlighting zones for which the programmed feedrate is not reached. This constitutes as an indicator for trajectory optimization. The efficiency of the model is illustrated through examples. Finally, the model could be used for optimizing process planning.