LASER CONDUCTION MODE WELDING OF ALUMINUM ALLOYS WITH CROSS DUAL LASER BEAMS

摘要

A method of laser welding aluminum alloy workpieces with dual laser beams arranged in a cross-beam orientation is disclosed. The method comprises directing dual laser beams, which include a first laser beam and a second laser beam, at and along a weld seam established between the aluminum alloy workpieces together with a filler wire. The first laser beam includes a first longitudinal axis and the second laser beam includes a second longitudinal axis. When arranged in the cross-beam orientation, a plane that intersects the first longitudinal axis and the second longitudinal axis of the first and second laser beams, respectively, forms a line where it meets the aluminum alloy workpieces that is oriented transverse to the weld seam.

主权项

1. A method of laser welding aluminum alloy workpieces, the method comprising:
providing a first aluminum alloy workpiece and a second aluminum alloy workpiece that are brought together to form a weld seam; directing dual laser beams toward the weld seam established between the aluminum alloy workpieces, the dual laser beams comprising a first laser beam extending along a first longitudinal axis and a second laser beam extending along a second longitudinal axis, and wherein a plane that intersects the first and the second longitudinal axes of the first and second laser beams forms a line where the plane meets the first and second aluminum alloy workpieces that is transverse to the weld seam; moving the dual laser beams along the weld seam together with a filler wire without producing a keyhole that penetrates into the first and second aluminum alloy workpieces, the filler wire having a working end that tracks the weld seam and is impinged by both the first and second laser beams at the weld seam; and melting the working end of the filler wire with the dual laser beams to deposit molten filler material along the weld seam as the dual laser beams and the filler wire are moved along the weld seam, the molten filler material solidifying behind the dual laser beams into a laser weld joint.