Process Research and Numerical Simulation Analysis of Laser Welding of Plastics

Jianchao, 王健超 Wang; Xuanjun, 张瑄珺 Zhang; Wei, 张伟 Zhang; Zhaohua, 姜兆华 Jiang

doi:10.3788/al20143403.0233

应用激光

2014

DOI: 10.3788/al20143403.0233

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Process Research and Numerical Simulation Analysis of Laser Welding of Plastics

王健超 Wang Jianchao¹,

张瑄珺 Zhang Xuanjun²,

张伟 Zhang Wei³

et al.

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Study on Laser Welding Technology of PC Plastic

Wu¹

2017

dtetr

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For the PC plastic laser welding, the equipment system and welding requirements were designed.The the fixture was used to press the PC plastic for laser welding. The color of the PC were designed that the up layer was white, and the lower was black, so the up layer absorbed laser energy and melt in the plastic contact surface, forming a welding area. Then the orthogonal optimization experiment was designed under the laser power, defocusing distance and the welding speed. It finally obtained the optimum process parameters that the welds was without bubble and space. The further tensile test results showed that the tensile strength increased with the increase of the welds width, the tensile strength reached to the top when the welds width was 1.2 mm.

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Study on Laser Welding Technology of PC Plastic

Wu¹

2017

dtetr

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Light Scattering of HDPE and LDPE in Laser Transmission Welding

Zhong

Fan

Liu

et al. 2015

KEM

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Light scattering of the upper polymer have a great influence on welding quality. Light scattering of high density polyethylene (HDPE) and low density polyethylene (LDPE) are assessed by constructing experiment and numerical computation method. Firstly, the beam quality of semiconductor laser is analyzed, power flux distribution of the laser beam in a defocused plane is measured by knife edge method; Afterwards, the power flux distributions of the laser beam after passing through HDPE/LDPE are measured by line scanning method; Lastly, with the combination of the mathematical model which is used to calculate scattering coefficient and standard deviation of scattering, scattering related parameters and the laser power flux distribution at the welding interface are obtained by writing a program in MATLAB. The results show that the light scattering coefficient of high density polyethylene is up to 0.988, the light scattering coefficient of low density polyethylene is 0.92; Higher crystalline polyethylene leads to more obvious light scattering; the laser beam power flux distribution at the weld interface affected by scattering is determined, which lays a solid foundation on numerical simulation in laser transmission welding.

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Process Research and Numerical Simulation Analysis of Laser Welding of Plastics

Cited by 2 publications

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Study on Laser Welding Technology of PC Plastic

Study on Laser Welding Technology of PC Plastic

Light Scattering of HDPE and LDPE in Laser Transmission Welding

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