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Product Code: ICAL09_M405

Humping Reduction Methods for High Speed Laser Welding
Authors:
Scott Cornell, Mound Laser & Photonics Center, Inc.; Miamisburg OH USA
Kevin Hartke, Mound Laser & Photonics Center, Inc.; Miamisburg OH USA
Sarah Bertke, Presenter not Author; -
Presented at ICALEO 2009

Conventional laser welding speeds, on the order of millimeters per second, are not economically feasible for future energy applications such as fuel cells. A typical fuel cell stack may have hundreds of feet of weld length which must be executed with high precision and no defects, as a single defective weld could result in failure of the entire stack. Recent technological advances in both laser systems and in beam movement are allowing dramatic increases in welding rates. A high average power (500W), continuous wave laser can be fiber coupled directly into a galvometric driven scanhead beam steering system to achieve laser scanning rates approaching meters per second. Mound Laser & Photonics Center, Inc. has developed specific weld patterns to mitigate imperfections in the welds, utilizing a combination of beam control and high power. High speed photography is being used to study and understand the weld phenomena taking place at these high weld rates. We discuss how different weld techniques are being utilized to lower processing times and costs for the fuel cell industry.

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$28.00

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