Building free-form thin shell parts using supportless extrusion-based additive manufacturing
Building free-form thin shell parts using supportless extrusion-based additive manufacturing
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DOI：
10.1016/j.addma.2019.101003
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发表时间：
2020-03-01
影响因子：
11
通讯作者：
Gupta, Satyandra K.
中科院分区：
文献类型：
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作者：
Bhatt, Prahar M.;Malhan, Rishi K.;Gupta, Satyandra K.
传统的材料挤出增材制造能够构建复杂的结构。悬伸特征需要使用支撑结构。打印支撑结构需要额外的时间和材料。传统工艺需要时间来去除支撑材料，并且可能导致表面光洁度降低。可以通过动态地重新定向构建平台来避免使用支撑结构。本文提出了一种新的方法来建立精确的薄壳零件使用无支撑挤压增材制造。我们描述了层切片算法，刀具路径规划算法，和基于神经网络的补偿轨迹生成方案，使用3自由度构建平台和3自由度挤压工具，使用两个机械手建立精确的薄壳零件。这样的薄壳部件不能在没有支撑的情况下通过先前的无支撑AM工艺来构建。我们说明了我们的算法的有用性，通过建立几个薄壳部分。
Conventional material extrusion additive manufacturing is capable of building complex structures. Overhanging features require the use of support structures. Printing the support structure requires additional time and material. Conventional processes need time to remove support material and may lead to degraded surface finish. The use of support structures can be avoided by dynamically reorienting the build-platform. This paper presents a novel approach to build accurate thin shell parts using supportless extrusion-based additive manufacturing. We describe the layer slicing algorithm, the tool-path planning algorithm, and the neural network-based compensated trajectory generation scheme to use a 3 degree of freedom build-platform and a 3 degree of freedom extrusion tool to build accurate thin shell parts using two manipulators. Such thin shell parts cannot be built without supports by previous supportless AM processes. We illustrate the usefulness of our algorithms by building several thin shell parts.