Masamitsu Kaneko, Nobuyasu Matsumoto, Takashi Shigematsu


In the laser welding of copper materials, we have developed a Blue-IR hybrid laser that can greatly improve the processing quality compared to the processing with only a near-infrared fiber laser. By combining an efficient heat input to the copper material with the blue laser and a local heat input with the fiber laser, the molten pool can be stabilized, which is difficult with only the fiber laser, and while suppressing the generation of processing defects such as spatters and blowholes, a welding method which can obtain deep penetration has been achieved.

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