In-process monitoring and adaptive control for prevention of through-holes in full-penetration lap welds of aluminum alloy sheets

摘要: The availability of adaptive control for microspot lap welding A3003 aluminum alloy sheets 0.1 mm in thickness with a pulsed fundamental yttrium-aluminum-garnet laser beam was investigated the objective stable production sound full-penetration spot welds without through-holes. Two through-holes were produced among 20 samples subjected to normal pulse beam. in-process monitoring results reflected light and heat radiation signals showed that minimum value intensity lower maximum variations rate change higher due generation through-hole. Therefore, power controlled at 0.15 ms intervals order maintain both variation within levels formation welds. Consequently, fully penetrated consistently all samples, owing ...