| 引用本文: | 杨永强,卢建斌,王迪,罗子艺.316L不锈钢选区激光熔化成型非水平悬垂面研究[J].材料科学与工艺,2011,19(6):94-99.DOI:10.11951/j.issn.1005-0299.20110617. |
| YANG Yong-qiang,LU Jian-bin,WANG Di,LUO Zi-yi.A study of 316L stainless steel non-horizontal overhanging surface in selective laser melting[J].Materials Science and Technology,2011,19(6):94-99.DOI:10.11951/j.issn.1005-0299.20110617. |
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| 摘要: |
| 为了提高选区激光熔化直接成型非水平悬垂面的能力,通过实验研究了影响悬垂面极限成型角度的工艺因素.实验使用316L不锈钢粉末,设计了不同倾斜角度的悬垂平面模型和悬垂曲面模型.结果表明:提高预置粉末密度可以提高悬垂面成型的极限角度;在25μm的成型厚度下,激光扫描能量输入在0.15～0.2 J/mm时悬垂面成型精度最高,悬垂面翘曲最小,成型完整悬垂表面的倾斜角度达到30°.最后,通过成型带有悬垂结构的个性化零件对研究结果进行验证.成型件悬垂结构在成型方向和水平方面上的尺寸精度分别达到0.1 mm以下和0.01 mm.本研究从工艺和设计的角度为选区激光熔化技术直接成型非水平悬垂面提出了基本的控制和优化方法. |
| 关键词: 光学制造 快速成型 选区激光熔化 非水平悬垂面 |
| DOI：10.11951/j.issn.1005-0299.20110617 |
| 分类号:TN249 |
| 基金项目:2010年广东省教育部产学研结合重点项目(2010A090200072) |
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| A study of 316L stainless steel non-horizontal overhanging surface in selective laser melting |
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YANG Yong-qiang, LU Jian-bin, WANG Di, LUO Zi-yi
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School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China
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| Abstract: |
| For improving the capability of directly fabricating of non-horizontal overhanging surface by selective laser melting,the process factors of overhanging surface fabricating limitation were studied by experiments.By use of 316L stainless steel,the overhanging plane models with different inclined angles and overhanging curved surface model were designed and experimented.It’s found that the critical angle of undersurface forming could be increased by enhancing the preset powder density.On the condition of layer thickness 25 μm,the fabrication accuracy of overhanging surface was best: the warping of overhanging surface was minimized,and the critical angle of completed overhanging surface got 30° when laser scanning energy was 0.15～0.2 J/mm.The research results were verified by fabricating customized parts with overhanging structure.The dimensional accuracies of overhanging structures on fabricating parts were 0.1 mm below in building direction and 0.01 mm in horizon. |
| Key words: optical fabrication rapid prototyping selective laser melting non-horizontal overhanging surface |
