Research of laser welding property of polycarbonate based on finite element method
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摘要: 为了揭示焊接参量对焊接质量的影响机理,优化焊接工艺参量,利用超景深显微镜和拉伸试验机对不同功率、焊接速率和材料厚度参量下的焊接强度进行了观察和测试。采用ABAQUS建立3维轴对称物理模型,对焊接过程中的温度分布进行了有限元模拟,并通过正交试验获得了各参量对焊接质量的影响规律。结果表明,激光功率是影响焊接强度的首要因素,其次是焊接速率,材料厚度影响最小;焊接过程中焊接温度越高,焊缝的宽度越大,可能导致熔池材料分解,焊缝中的气泡增多,影响焊接强度。Abstract: In order to study the mechanism of the welding parameters on the welding quality and optimize the welding parameters, optical microscopy and tensile testing machine were applied to observe and test the welding strength under different laser power, welding speed, material thickness. A 3-D physical model with axial symmetry was implemented to simulate the temperature field based on software ABAQUS and the effect of parameters on welding quality was obtained from orthogonal test. The results suggest that most important factor is laser power, followed by welding speed and material thickness. Meanwhile, higher temperature may cause bubbles to increase and affect welding strength.
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Keywords:
- laser technique /
- laser welding /
- finite element analysis /
- temperature field /
- welding strength
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[1] DULEY W W, MUELLER R E. CO2 laser welding of polymers [J]. Polymer Engineering and Science,1992,32(9):582-585.
[2] POTENTE H, KORTE J, BECKER F. Laser transmission welding of thermoplastics: analysis of the heating phase [J].Journal of Reinforced Plastics and Composites, 1999, 18(10):914-920.
[3] BECK W A, HUANG M, KETTERL J,et al. IR laser welding of thin polymer filmsas a fabrication method for polymer MEMS[J].Proceedings of the SPIE, 2003, 5067:167-178.
[4] CHEN M L, ZAK G, BARES P J. Effect of carbon black on light transmission in laser welding of thermoplastics [J].Journal of Materials Processing Technology,2011,211(1):43-47.
[5] HABERSTROH E, LUTZELER R. Influence of carbon black pigmentation on the laser beam welding of plastic micro parts [J]. Journal of Polymer Engineering,2001,21(2/3):119-130.
[6] CHEN M L. Gap bridging in laser transmission welding of thermoplastics [D].Kingston,Canada: Queen's University, 2009:127-133.
[7] ACHERJEE B, KUAR A S, MITRA S, et al. Modeling of laser transmission contour welding process using FEA and DoE [J]. Optic & Laser Technology, 2012, 44(5):1281-1289.
[8] WU D J,WANG Zh H,MA G Y, et al. Analysis of fluid flow and heat transfer in weld pool during pulsed laser welding hastelloy C-276 alloy [J].Optics and Precision Engineering,2012,20(3):534-539 (in Chinese) .
[9] WANG X, YANG K, ZHANG H Zh, et al. Experiment research on laser transmission welding of two different thermoplastics [J].Transactions of the China Welding Institution,2009,30(5):97-100(in Chinese).
[10] YUAN H, LAI J J, HE Y G. Experimental study on laser welding of thermoplastics [J].Optics and Optoelectronic Technology,2005,3(1):18-21(in Chinese).
[11] WANG J Ch, QIN L M, LI J. Technics and microcosmic analysis research of PMMA/ABS thermoplastic laser transmission welding [J].Applied Laser,2008,28(4):287-291(in Chinese).
[12] WANG Y L, CUI Y, WANG J Ch, et al. Technology of laser welding plastic [J].Applied Laser,2006,26(2):93-96(in Chinese).
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