Results 141 to 150 of about 2,164 (187)

Review study on remote laser welding with fiber lasers

Journal of Laser Applications, 2013
The appearance of the high-power fiber laser with brilliant beam quality enables a rapid development of remote laser welding (RLW). In this paper, a theoretical study of remote laser welding has been reviewed. As a promising technology, the RLW offers an increased flexibility, high operational speed, and reduced cycle time to process a wide range of ...
Veli Kujanpää, Kujanpää Veli
exaly   +2 more sources

Effect of the laser-induced vapor in the keyhole on the weld surface roughness in fiber laser welding

Journal of Laser Applications, 2022
Weld surface roughness is an important criterion for evaluating weld quality. The main factors that affect weld surface roughness in fiber laser keyhole welding are identified by an in situ observation of the dynamic behavior of a keyhole mouth and by analyzing the eruption characteristics of the laser-induced vapor on the front keyhole wall (FKW).
Jianglin Zou, Baoqi Zhu, Gaolei Zhang, Fan Jiang, Qiang Wu, Rongshi Xiao   +5 more
openaire   +1 more source

Fiber laser welding of HSLA steel by autogenous laser welding and autogenous laser welding with cold wire methods

Journal of Materials Processing Technology, 2020
Abstract 6 mm thickness high strength low alloy (HSLA) steel butt joints were fabricated by fiber laser welding. The influence of welding parameters on morphologies, weld process behavior, microstructure and mechanical properties were investigated.
Shiwei Zhang, Junhao Sun, Minhao Zhu, Lin Zhang, Pulin Nie, Zhuguo Li   +5 more
openaire   +1 more source

Femtosecond fiber laser welding of dissimilar metals

Applied Optics, 2014
In this paper, welding of dissimilar metals was demonstrated for the first time, to the best of our knowledge, by using a high-energy high-repetition-rate femtosecond fiber laser. Metallurgical and mechanical properties were investigated and analyzed under various processing parameters (pulse energy, repetition rate, and welding speed).
Huan, Huang, Lih-Mei, Yang, Shuang, Bai, Jian, Liu   +3 more
openaire   +2 more sources

Femtosecond fiber laser welding of PMMA

SPIE Proceedings, 2015
Femtosecond-pulsed laser welding of transparent materials on a micrometer scale is a versatile tool for the fabrication and assembly of electronic, electromechanical, and especially biomedical micro-devices. In this paper, we report on microwelding of two transparent layers of polymethyl methacrylate (PMMA) with femtosecond laser pulses at 1030 nm in ...
Volpe Annalisa, Di Niso Francesca, Gaudiuso Caterina, De Rosa Andrea, Vázquez Rebeca Martínez, Ancona Antonio, Lugarà Pietro Mario, Osellame Roberto   +7 more
openaire   +2 more sources

Fiber laser welding and suppression of spatters

ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics, 2018
Welding with fiber lasers causes some welding defects due to generation of many spatters. In sight of the production technology, suppression of those is necessary for improving production efficiency and assuring their quality. We tried to suppress the spatters by using beam mode controlled technology and succeed with the stainless steel and the pure ...
Tomomichi Yasuoka, Takashi Kayahara, Toshiaki Sakai, Takashi Shigematsu   +3 more
openaire   +1 more source

Weld penetration and phenomena in 10 kW fiber laser welding

ICALEO 2007: 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2007
A high-power fiber laser can produce an ultra-high peak power density of MW/mm2 level corresponding to a focused electron beam, and is promising as one of the desirable heat sources for high-speed and deep-penetration welding. This research was undertaken with the objective of obtaining a fundamental knowledge of 10 kW high-power fiber laser welding on
Seiji Katayama, Yousuke Kawahito, Keisuke Kinoshita, Naoyuki Matsumoto, Masami Mizutani   +4 more
openaire   +1 more source

Fundamentals of fiber laser remote welding and deep penetration welding

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Remote/scanner welding and deep penetration welding with a fiber laser of high power and high beam quality is receiving a great attention since the laser can achieve high-speed welding and deep penetraion welding for mass production. However, welding phenomena are not fully understood.
null Seiji Katayama, null Shinpei Oiwa, null Naoki Matsumoto, null Masami Mizutani, null Yosuke Kawahito   +4 more
openaire   +1 more source