EQUIPMENT AND METHOD FOR COMBINED WELDING OF LASER AND ARC

摘要

PROBLEM TO BE SOLVED: To provide equipment and a method for combined welding using jointly a laser and an arc by which high-quality weld zone where is free from the generation of weld defects such as porosity is obtained and also stable weld bead is formed.

SOLUTION: By forming a fine and deep groove-like keyhole on the surface of a material to be welded by irradiation of a laser beam and generating the arc between the electrode for the heat source of the arc and the material to be welded, a molten pool is formed on the surface of the material to be welded. The keyhole and the molten pool are connected. The keyhole is shielded by laser shielding gas and the molten pool is shielded by are shielding gas. The laser shielding gas and the arc shielding gas are different gas.

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