Virtual and Physical Prototyping ( IF 10.6 ) Pub Date : 2020-05-12 , DOI: 10.1080/17452759.2020.1756086 Yuchu Qin 1 , Qunfen Qi 1 , Peizhi Shi 1 , Paul J. Scott 1 , Xiangqian Jiang 1
ABSTRACT
In this paper, a novel facet clustering based method is proposed to generate alternative build orientations for laser powder bed fusion. This method consists of two steps. First, a hierarchical clustering algorithm is applied to divide facets of the design model in standard tessellation language format into different clusters, each of which shares a similar normal vector. Second, alternatives of each cluster are computed and the final set of alternative build orientations is generated by combining and refining the alternatives from all clusters. To illustrate and validate the method, a set of examples including both regular and freeform surface models are tested, and qualitative and quantitative comparisons between the method and the existing methods are reported. The results suggest that the proposed method is feasible and effective for both regular and freeform surface parts. It is evident that the proposed method can output stable results, provide satisfying efficiency, and work well with facet clusters of varying probability density.
中文翻译:
基于面聚类自动生成激光粉末床融合的替代构建方向
摘要
在本文中,提出了一种新颖的基于面聚类的方法来生成激光粉末床融合的替代构造方向。此方法包括两个步骤。首先,应用层次聚类算法将标准镶嵌语言格式的设计模型的各个方面划分为不同的簇,每个簇共享相似的法向矢量。其次,计算每个群集的替代方案,并通过组合和细化来自所有群集的替代方案来生成最终的替代构建方向集。为了说明和验证该方法,测试了一组包含常规和自由曲面模型的示例,并报告了该方法与现有方法之间的定性和定量比较。结果表明,所提出的方法对于规则和自由曲面零件都是可行且有效的。显然,所提出的方法可以输出稳定的结果,提供令人满意的效率,并且可以在概率密度不同的方面聚类中很好地工作。