Effect of fiber laser welding parameters on root humps

ZHOU Cong; XIA Hailong; CHEN Genyu; LI Shichun; LI Changzou

doi:10.7510/jgjs.issn.1001-3806.2015.05.009

LASER TECHNOLOGY > 2015 > 39(5): 625-630. > DOI: 10.7510/jgjs.issn.1001-3806.2015.05.009

ZHOU Cong, XIA Hailong, CHEN Genyu, LI Shichun, LI Changzou. Effect of fiber laser welding parameters on root humps[J]. LASER TECHNOLOGY, 2015, 39(5): 625-630. DOI: 10.7510/jgjs.issn.1001-3806.2015.05.009

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Effect of fiber laser welding parameters on root humps

1.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;
2.
Laser Research Institute, Hunan University, Changsha 410082, China

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Received Date: August 31, 2014
Revised Date: September 17, 2014
Published Date: September 24, 2015

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Abstract

Abstract

In order to study influence of welding parameters on root humps in high power fiber laser welding, effect of laser power, welding speed, defocus, flow rate of bottom shielding gas and welding position on root humps was studied based on a single variable method. The results show that, with the increase of laser power, root humps tend to increase at first and then decrease. When welding speed increases, root hump height increases at first and then decreases, root hump spacing decreases significantly. When defocus is near 0mm, root hump tendency is obvious. Under the appropriate flow rate of bottom shielding gas, root hump tendency is reduced. The optimal rate is 15L/min. When welding orientation is 60, root hump tendency decreases to a certain extent. The results show that reasonable welding parameters can eliminate root hump efficiently.
- laser technique,
- laser welding,
- welding parameters,
- root hump

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