Mathematical modelling of abrasive waterjet footprints for arbitrarily moving jets: Part II-Overlapped single and multiple straight paths
Mathematical modelling of abrasive waterjet footprints for arbitrarily moving jets: Part II-Overlapped single and multiple straight paths
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DOI：
10.1016/j.ijmachtools.2013.01.003
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发表时间：
2013-05-01
影响因子：
14
通讯作者：
Kong, M. C.
中科院分区：
文献类型：
--
作者：
Billingham, J.;Miron, C. B.;Kong, M. C.
控制深度磨料水射流加工（铣削）被认为是一种利基技术，能够在任何材料中产生复杂的几何形状，而不管其性能如何。水射流铣削的关键是开发预测射流足迹的模型。作者之前的工作报告了自由运动射流在不同撞击角度下的单足迹几何模型。首先，本工作确定了使单射流足迹模型准确地反映低射流撞击角的方法，这种低射流撞击角可能发生在足迹重叠时。然后，本文首次提出了一个经过验证的模型，该模型可以预测重叠足迹（具有阶梯运动的射流）的表面微观几何形状，并分析了预测连续层中去除的材料的误差传播。该建模方法能够以较低的误差预测单个和多个（即分层）重叠足迹获得的表面，从而证明了其有效性。
Controlled-depth abrasive waterjet machining (milling) is considered as a niche technology, capable of generating complex geometries in any material regardless of its properties. The key enabler of waterjet milling is the development of a model for predicting the jet footprint. The authors' previous work reported on a geometrical model for a single footprint of a free-moving jet for various impingement angles upon the target surface. Firstly, the present work identifies ways to make the single jet footprint models accurate for low jet impingement angles that are likely to occur when footprints are overlapped. Then, the paper presents for the first time a validated model that predicts the surface micro-geometry for overlapped footprints (jet with step-over movement), and an analysis of error propagation for predicting the material removed in successive layers. The modelling approach has proved its validity by being able to predict the surfaces obtained from single and multiple (i.e. layered) overlapped footprints with low errors, i.e.