American Journal of Engineering and Applied Sciences

Experimental Investigation on Micro-Welding of Thin Stainless Steel Sheet by Fiber Laser

Mohd Idris Shah Ismail, Yasuhiro Okamoto, Akira Okada and Yoshiyuki Uno

DOI : 10.3844/ajeassp.2011.314.320

American Journal of Engineering and Applied Sciences

Volume 4, Issue 3

Pages 314-320

Abstract

Problem statement: The miniaturization of components plays an important role for manufacturing in electrical and electronic industries. The joining technology of thin metal sheets has been strongly required. Laser welding with micro-beam and high-speed scanning is a promising solution in micro-welding, because it has high-potential advantages in welding heat sensitive components with precise control of heat input and minimal thermal distortion. Approach: In this study, the characteristics of laser micro-welding of thin stainless steel sheets by using a single-mode CW fiber laser with high-speed scanning system were experimentally investigated. Results: It was clarified that the welding bead width and depth increased with increasing the scanning velocity under a constant energy density condition and high efficient welding was expected by using high-speed laser scanning with Galvano scanner. The utilization of shielding gas was very effective to obtain smooth fusion bead and the combination of micro beam spot and high-speed laser scanning made it possible to obtain good overlap welding of ultra-thin stainless steel sheets. Conclusion: A faster and high quality welding could be achieved by using a single-mode fiber laser with micro-beam and high-speed scanning.

Copyright

© 2011 Mohd Idris Shah Ismail, Yasuhiro Okamoto, Akira Okada and Yoshiyuki Uno. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.