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SWING LASER FILLER WIRE WELDING METHOD FOR LARGE-GAP BUTT JOINT OF ALUMINUM ALLOY THIN PLATES
SWING LASER FILLER WIRE WELDING METHOD FOR LARGE-GAP BUTT JOINT OF ALUMINUM ALLOY THIN PLATES
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机译：铝合金薄板大间隙对接的摆动式激光填丝焊接方法
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摘要
A swing laser filler wire welding method for a large-gap butt joint of aluminum alloy thin plates, the method comprising the following steps: firstly, preparing two aluminum alloy thin plates, and reserving a gap (2) between butt-joint faces of the two aluminum alloy thin plates; arranging a laser head (1), a wire feeding nozzle (3) and a protective gas spray nozzle (4) above the gap; pre-arranging a first guide plate (5) at a welding starting end of the gap, and after a molten pool is formed in the first guide plate by means of a laser beam, leading the molten pool to the welding starting end of the gap; and the wire feeding nozzle and the laser head then corresponding to the gap and advancing in the same direction, and an aluminum alloy welding wire being heated and melted by means of the laser beam and then filling the whole gap, so that the welding operation of the two aluminum alloy thin plates is completed. By means of the method, the amount of aluminum alloy thin plates that melt due to a laser beam can be reduced as much as possible, the dilution rate of a welding joint is reduced, the generation of metallurgical reaction brittle phases is reduced, and the porosity rate of the joint can also be reduced, thereby achieving the welding of aluminum alloy thin plates made of a conventional aluminum alloy and an aluminum-based composite material and made by means of additive manufacturing.
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