Laser welding method and laser welding apparatus

Details Laser welding method and laser welding apparatus Laser welding method and laser welding apparatus

2005-12-02

2010-10-05

Heinrich, Samuel M (Department: 3742)

Electric heating

Metal heating

By arc

C219S121760

Reexamination Certificate

active

07807939

ABSTRACT:
A YAG pulse laser oscillator10oscillates/outputs pulse width-variable YAG fundamental pulse laser light LB, and a YAG pulse laser oscillator12oscillates/outputs pulse width-variable YAG second harmonic pulse laser light SHG. An emission unit20superposes the pulse laser light LB and the pulse laser light SHG on the same optical axis and focuses, and irradiates a welding point K on welding pieces (W1and W2) with, the pulse laser light LB and the pulse laser light SHG. A control unit18controls the laser oscillation operation of the laser oscillators10and12so that the point in time when the laser output of the YAG second harmonic pulse laser light SHG reaches its peak is slightly earlier than the point in time when the laser output of the YAG fundamental pulse laser light LB reaches its peak.

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