Fabrication and affecting factors of metallic parts by means of laser freeforming

HU Qian-wu; YANG Tai-ping; LI Peng; ZENG Xiao-yan

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.

Corresponding author: HU Qian-wu, huqw@mai.lhust.edu.cn;

1. National Engineering Research Center for Laser Processing, Institute of Optoelectronics Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074, China

Received Date: 2006-05-29

Accepted Date: 2006-07-06

Available Online: 2007-08-25

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.

HTML

Reference (11)

[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.
[2]	LEWIS G K,SCHILENGER E.Practical considerations and capabilities for laser assisted direct metal deposition[J].Material and Design,2000,21:417～423.
[3]	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.
[4]	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.
[5]	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).
[6]	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).
[7]	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).
[8]	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).
[9]	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).
[10]	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).
[11]	The Compiling Group for the Book.Methods of orthogonal experimental design[M].Shanghai:Shanghai Scientific and Technical Publishers,1979.52 (in Chinese).

Fabrication and affecting factors of metallic parts by means of laser freeforming

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views