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SIMULATION PROCESS IN LASER WELDING Ⅱ

Acta Metallurgica Sinica(English Letters) 2000年第1期13卷 49-55页

作者： Y. P. Kathuria (Laser X Co. Ltd. Chick - shi Aichi - ken 472, Japan)

With the established technique of laser in science and industry, its applications hare become diversified in the automotive *** potential lasers CO2 and Nd - YAG operating in the i. r. region hare been applied in various demains covering different spectrum of welding,ranging from dissimilar matal to aluminium alloy *** lasers considered as thermal processing tools offers an advantage of the keyhole welding offered by the electron beam where the energy is transferred from the surface by the keyhole formation. with the incorporation of these lasers as a flexible thermal processing tool,it has become essential to use them optimally through feedback with planning and constructional *** upon the modulation and duty cycle variation,a simulation technique is demonstrated which enable us to estimate the processing results and determine the characterisitcs of the fabricated part. From the giv- en provess parameters such as haer power, focus radius,processing speed /interaction time and materi- al characteristics, one can optimize the welding condition etc. through the simulation process. In the present work the laser simulation process in welding were carried out with Al- alloy A 5052 of various thickness by using a multiwave high power Nd - YAC *** simulated weld conditions resulted in better utility of the lasers with increased efficiency and better quality. The use of simuation method helped in the designing and prediction of welding technology, which reduced the rejection rate as well as the cost of production.

关键词： easer beam welding aluminium alloy,weldability,solidification and modulation

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