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27 March 1997 Precleaning and spot welding of an automative body steel using a Nd:YAG laser
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While coating automotive body steels with zinc has a beneficial effect on their corrosion properties it can give significant problems when individual panels are subsequently welded to form the body shell. This work shows that a pulsed Nd:YAG laser can be used as a precleaning tool to locally remove the zinc and then as a spot welding device to join 2 sheets in a lap weld configuration. Laser spot welding can produce joints having adequate strength at a range of conditions but the localized nature of the heat input can produce damage on the top surface, this is often not acceptable in structures such as an automotive body shell. In this work, conditions have been identified which are capable of precleaning the area to be welded and able to produce welds having adequate strength with cosmetically acceptable surfaces.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ian R. Pashby, Anthony P. Hoult, and Chin Chai Nyiau "Precleaning and spot welding of an automative body steel using a Nd:YAG laser", Proc. SPIE 2993, Lasers as Tools for Manufacturing II, (27 March 1997);


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