激光选区熔化成型典型几何特征尺寸精度研究

发布时间：2018-05-31 17:40

本文选题：激光技术 + 设计规则　；参考：《中国激光》2015年03期

【摘要】：为了探讨激光选区熔化成型典型几何特征的尺寸精度,并为激光选区熔化直接成型金属零件提供设计参考依据,设计了薄板、尖角、圆柱体、圆孔、方孔等典型几何特征的三维模型,采用华南理工大学研发的激光选区熔化设备(Di Metal-100)在优化的工艺参数下选用316L不锈钢粉末对这些典型几何特征进行激光选区熔化成型。实验结果表明,激光光斑约束、台阶效应、粉末粘附、激光深穿透等因素是影响零件尺寸精度和激光选区熔化成型能力的主要原因。基于对激光选区熔化成型典型几何特征的尺寸精度及成型能力研究,提出了一些适用于激光选区熔化的零件设计规则,为产品的创新设计提供了参考依据。
[Abstract]:In order to discuss the dimensional accuracy of typical geometric characteristics of laser selective melting molding, and to provide the basis for the design of metal parts directly formed by laser selective melting, thin plates, sharp angles, cylinders and holes are designed. Based on the 3D model of typical geometric features such as square holes, the laser selective melting equipment (Di Metal-100) developed by South China University of Technology is used to form these typical geometric characteristics by laser selective melting molding with 316L stainless steel powder under optimized technological parameters. The experimental results show that the factors such as laser spot confinement, step effect, powder adhesion and laser penetration are the main factors that affect the dimensional accuracy of parts and the ability of laser selective melting molding. Based on the research on the dimension accuracy and forming ability of typical geometric features of laser selective melting molding, some design rules for laser selective melting are put forward, which provide a reference for the innovative design of products.
【作者单位】：华南理工大学机械与汽车工程学院;
【基金】：国家自然科学基金(51275179,51405160) 佛山市科技创新专项资金项目(2013AH100042)
【分类号】：TG665;TH161

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