Laser-welding method for stacked workpieces

Details Laser-welding method for stacked workpieces Laser-welding method for stacked workpieces

2011-07-12

2011-07-12

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C219S121610, C219S121630, C219S121640

Reexamination Certificate

active

07977620

ABSTRACT:
A laser welding method for stacked workpieces. A laser irradiation diameter that is irradiated on a surface of one workpiece among two stacked workpieces is set such that a laser irradiation diameter at a weld ending-edge portion is equal to or greater than approximately 1.5 times a laser irradiation diameter at a weld starting-edge portion. Thus, at the weld ending-edge portion, the material is melted in a wider area compared to a conventional example, and therefore, the melted material is supplied to the center portion of the weld ending-edge portion while the weld ending-edge portion is solidifying. As a result, a depth of the recess at the weld ending-edge portion can be made shallow enough to guarantee the welding quality of each of the workpieces.

REFERENCES:
patent: 2006/0237402 (2006-10-01), Nagashima et al.
patent: 2002 219590 (2002-08-01), None
patent: 2006 224134 (2006-08-01), None
patent: 2006 297464 (2006-11-01), None
patent: WO 2007036797 (2007-04-01), None

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