Design of semiconductor laser multi-point beam based on laser welding of galvanized sheet

Yuyan Song; Xiang Li; Cong Hu; Ran Xia; Ao Zou; Xiahui Tang

doi:10.1117/12.2572960

10 October 2020 Design of semiconductor laser multi-point beam based on laser welding of galvanized sheet

Yuyan Song, Xiang Li, Cong Hu, Ran Xia, Ao Zou, Xiahui Tang

Proceedings Volume 11546, Advanced Laser Processing and Manufacturing IV; 1154605 (2020) https://doi.org/10.1117/12.2572960
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

The Galvanized steel sheet is used as the automotive body material, and the evaporation of zinc into the weld seam will cause welding defects during the laser welding process. The multi-point laser beam has great development potential in automobile industry, because it can effectively reduce the integration of the galvanized layer into the weld seam during welding. In this paper, a panda-shaped three-point beam (panda beam) is proposed to replace the original single beam used in welding and three methods to realize the panda beam have been discussed. The beam splitting of the diffraction grating is performed, and the three, five and four beam-splitting ratio Daman gratings are obtained but with relatively high energy loss. Additionally, based on the theory of grating diffraction, a panda beam has been obtained by splitting the 4kW incident laser through the Bragg grating. The single front beam radius is 0.6mm with a power of 1.1261kW, and the distance between the two front beams is 3.8mm. The radius of the main beam is 1mm with a power of 1.7168kW, and the distance from the front beam to the main beam is 9.7mm. Lastly, based on the beam splitting theory of geometric optics, the multi-point beam and the panda beam are realized by the ridge reflector with an energy loss of 14.09%, which shows the great advantage of laser beam splitter compared with multi-light source structure in practical application. When welding with the panda beam, two functions of zinc coating and solder melting are carried out respectively, which can avoid zinc vapor entering the molten pool and improve the welding quality

Conference Presentation

Citation Download Citation

Yuyan Song, Xiang Li, Cong Hu, Ran Xia, Ao Zou, and Xiahui Tang "Design of semiconductor laser multi-point beam based on laser welding of galvanized sheet", Proc. SPIE 11546, Advanced Laser Processing and Manufacturing IV, 1154605 (10 October 2020); https://doi.org/10.1117/12.2572960

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available