Effects of Metal Absorber Thermal Conductivity on Clear Plastic Laser Transmission Welding
Min-Qiu Liu1 , De-Qin Ouyang3 , Chun-Bo Li1,3 , Hui-Bin Sun2 , Shuang-Chen Ruan1**
1 Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 5180602 College of Physics Science and Technology, Shenzhen University, Shenzhen 5180603 Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118
Abstract ：In our previous study, metals have been used as absorbers in the clear plastic laser transmission welding. The effects of metal thermal conductivity on the welding quality are investigated in the present work. Four metals with distinctly different thermal conductivities, i.e., titanium, nickel, molybdenum, and copper, are selected as light absorbers. The lap welding is conducted with an 808 nm diode laser and simulation experiments are also conducted. Nickel electroplating test is carried out to minimize the side-effects from different light absorptivities of different metals. The results show that the welding with an absorber of higher thermal conductivity can accommodate higher laser input power before smoking, which produces a wider and stronger welding seam. The positive role of the higher thermal conductivity can be attributed to the fact that a desirable thermal field distribution for the molecular diffusion and entanglement is produced from the case with a high thermal conductivity.
收稿日期: 2018-07-19
出版日期: 2018-09-15
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2018, Vol. 35 
