Abstract
The welding of aluminum alloys has been increasing in demand for lightening electronic products and automobiles. The authorshave developed hybrid laser system which is consisted of a pulsed Nd:YAG laser and a continuous diode laser (hereafter LD) inorder to perform the high efficiency and high quality welding of aluminum alloys. A pulsed Nd:YAG laser of 1064nm inwavelength and a continuous LD of 808nm in wavelength are superposed on the same beam axis, and the superposed laser beamsof two wavelengths are delivered to the processing head through an optical fiber. The bead width and depth increases with thepower of continuous LD, which leads to overlapping welding even under a high speed condition.
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