Study on process of laser spot welding for ultra-thin copper
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School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, China
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Corresponding author:
YANG Yong-qiang, meyqyang@scut.edu.cn
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Received Date:
2009-07-01
Accepted Date:
2009-08-24
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Abstract
In order to weld ultra-thin T2 copper with high reflectivity by means of Nd:YAG laser at 1.064μm,based on orthogonal test method,effects of pulse peak current,its duration and frequency on maximum shear stress were studied under the conditions of nitrogen protection,+2mm defocusing amount and 1.5mm/s welding speed.The relationships between maximum shear stress and pulse peak current,its duration and frequency were obtained in the experiments; the welding surface and its microstructure were observed.The results show that the ultra-thin copper with high reflectivity can be well spot-welded by means of Nd:YAG laser at 1.064μm,based on design of processing parameters such as the laser pulse shape.
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