Process-Planning for Layered Manufacturing of Heterogeneous Objects Using Direct Metal Deposition
Process-Planning for Layered Manufacturing of Heterogeneous Objects Using Direct Metal Deposition
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DOI：
10.1115/1.1559152
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发表时间：
2002-12
期刊：
影响因子：
--
通讯作者：
K. Shin;D. Dutta
中科院分区：
文献类型：
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作者：
K. Shin;D. Dutta
分层制造（LM）是一种新兴的新技术，可以制造三维异质物体，如多材料和功能梯度材料（fgm）。异构对象的LM制造的必要步骤包括对象内部材料信息的表示和过程规划。本文介绍了一种考虑材料信息加工的加工计划方法。具体任务包括预处理（离散化）、定位（构建方向选择）和异构对象的自适应切片。本文特别关注的是将异质物体内部的所有材料信息转换为几何特征等材料特征的离散化过程。因此，通过近似估计构建时间，可以在各种预先选择的方向中选择最优构建方向。这是因为总构建时间取决于特性的复杂性。这种离散化过程还允许对异质物体进行自适应切片，以最大限度地减少表面光洁度和材料组成误差。此外，刀具轨迹规划可以简化为填充图案的生成。示例说明了整个过程。
Layered manufacturing (LM) is emerging as a new technology that enables the fabrication of three-dimensional heterogeneous objects such as multimaterials and functionally gradient materials (FGMs). The necessary steps for LM fabrication of heterogeneous objects include representation and process planning of material information inside an object. This paper introduces a new processing planning method that takes into account the processing of material information. The detailed tasks are pre-processing (discretization), orientation (build direction selection), and adaptive slicing of heterogeneous objects. In particular, this paper focuses on the discretization process that converts all of the material information inside a heterogeneous object into material features like geometric features. It is thus possible to choose an optimal build direction among various preselected ones by approximately estimating build time. This is because total build time depends on the complexity of features. This discretization process also allows adaptive slicing of heterogeneous objects to minimize surface finish and material composition error. In addition, tool path planning can be simplified into fill pattern generation. Examples are shown to illustrate the overall procedure.