Fabrication and affecting factors of metallic parts by means of laser freeforming
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摘要: 为了了解激光加工各参数对激光自由成型制造实体金属零件成型精度的影响,采用了正交设计的实验安排。采用速度前瞻型的CNC连续插补模式,解决了薄壁金属样件制造中截面轮廓路径上激光线能量过大的问题,制造了成型良好的激光自由成型金属样件。结果表明,扫描速度和激光功率是影响成型精度的两个主要因素,前者的影响更显著。Abstract: For the sake of evaluating the effect of laser processing parameters on the shaping accuracy of laser freeform fabricating for solid metallic parts;the experiment was arranged by means of orthogonal design.With the aid of CNC continuous interpolation model endowed with velocity prospecting,the problem of too large laser heat input on the sectional contour-path during fabricating of thin-wall metallic sample was solved.The metallic samples which in good shape were fabricated by means of laser freeform fabrication.The result shows that transverse velocity and laser power were the two major factors affecting the shaping accuracy and the effect of the former was more remarkable.
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[1] SRIVASTAVA D,CHANG I T H,LORETTO M H.The optimization of processing parameters and characterization of microstructure of direct laser fabricated TiAl alloy components[J].Materials and Design,2000,21:425～433.
[1] LEWIS G K,SCHILENGER E.Practical considerations and capabilities for laser assisted direct metal deposition[J].Material and Design,2000,21:417～423.
[2] MILEWSKI J O,DICKERSON P G,NEMEC R B.Application of a manufacturing model for the optimization of additive processing of Inconel alloy 690[J].Journal of Materials Processing Technology,1999,91:18～28.
[3] KOBRYN P A,MOORE E H,SEMIATIN S L.The effect of laser power and traverse speed on microstructure,porosity and build height in laser-deposited Ti-6Al-4V[J].Scripta Materialia,2000,43:299～305.
[4] JI S,LI P,ZENG X.Microstructure and mechanical property analyses of the metal parts direct fabricated by laser cladding[J].Laser Technology,2006,30(2):130～132(in Chinese).
[5] ZHANG Y,XI M,SHI L et al.Microstructure and properties of 316L stainless steel fabricated by laser direct forming[J].Rare Metal Materials and Engineering,2002,31(2):103～105(in Chinese).
[6] ZHONG M,YANG L,LIU W et al.Laser direct manufacturing W/Ni telescope collimation component[J].Chinese Journal of Lasers,2004,31(4):482～487(in Chinese).
[7] TAN H,CHEN J,YANG H et al.Real-time sensing and closed-loop control of laser rapid forming process.[J].Applied Laser,2005,25 (2):73～76(in Chinese).
[8] LI P.Direct laser fabrication of 3-dimentional metal parts based on laser cladding[D].Wuhan:Huazhong University of Science & Technology,2005.33～95 (in Chinese).
[9] YANG T,HU Q,ZENG X et al.Study on the algorithm of sectional contour lines building for laser direct metal forming[J].Electromachining & Mould,2003(6):32～35 (in Chinese).
[10] The Compiling Group for the Book.Methods of orthogonal experimental design[M].Shanghai:Shanghai Scientific and Technical Publishers,1979.52 (in Chinese).
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