Estimation of penetration depth by using coaxial image monitoring during laser lap welding

2007 ◽  
Author(s):  
Cheolhee Kim ◽  
Junghak Kim ◽  
Jeonghan Kim ◽  
Sehun Rhee
Keyword(s):  
Penetration Depth ◽  
Image Monitoring ◽  
Laser Lap Welding ◽  
Lap Welding

scholarly journals Closed Loop Control of Penetration Depth during CO2 Laser Lap Welding Processes

Sensors ◽  
2012 ◽  
Vol 12 (8) ◽  
pp. 11077-11090 ◽  
Author(s):  
Teresa Sibillano ◽  
Domenico Rizzi ◽  
Francesco P. Mezzapesa ◽  
Pietro Mario Lugarà ◽  
Ali Riza Konuk ◽  
...  
Keyword(s):  
Penetration Depth ◽  
Co2 Laser ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control ◽  
Laser Lap Welding ◽  
Lap Welding ◽  
Welding Processes

Dynamic features of plasma plume and molten pool in laser lap welding based on image monitoring and processing techniques

2019 ◽  
Vol 109 ◽  
pp. 168-177 ◽  
Author(s):  
Wei Meng ◽  
Xiaohui Yin ◽  
Junfei Fang ◽  
Lijie Guo ◽  
Qunshuang Ma ◽  
...  
Keyword(s):  
Molten Pool ◽  
Plasma Plume ◽  
Dynamic Features ◽  
Image Monitoring ◽  
Laser Lap Welding ◽  
Lap Welding ◽  
Processing Techniques

Influence of Ni-coating thickness on laser lap welding-brazing of Mg/Ti

2018 ◽  
Vol 108 ◽  
pp. 378-391 ◽  
Author(s):  
Caiwang Tan ◽  
Chengwei Zang ◽  
Xiaoye Zhao ◽  
Hongbo Xia ◽  
Qingshuang Lu ◽  
...  
Keyword(s):  
Coating Thickness ◽  
Laser Lap Welding ◽  
Lap Welding

Mechanism of Zn Vapour Suppressed by Al In Laser Lap Welding of High Strength Zinc Coated Sheet Steel

2010 ◽  
Vol 37-38 ◽  
pp. 634-642 ◽  
Author(s):  
Shi Quan Zhou ◽  
Zhen Guo Peng
Keyword(s):  
Binary Alloy ◽  
Sheet Steel ◽  
Travel Speed ◽  
Laser Fusion ◽  
Single Beam ◽  
Dual Beam ◽  
Beam Method ◽  
Laser Lap Welding ◽  
Lap Welding ◽  
Coated Sheet

The basic feasibility of laser fusion welding for prefabrication and assembly of zinc-coated sheet steel auto body components has been demonstrated in a significant number of prior studies. For trouble-free high volume manufacturing, however, one leading key technical concern remains incompletely resolved. In lap or similar weld joint geometries, venting of trapped Zn vapour can seriously disturb the molten weld pool and give rise to gross fusion defects. In this paper, the technical status of the issue has been reviewed, and various experiments were planned to explore Al foil as an interlayer and dual beam laser for suppressing Zn vapour. The results have shown that the welding processing is very sTable when the lap 1+1 mm sheet steel is welded by using Nd-Yag laser at 3KW power and 4m/min travel speed (defined as single beam) with 75μm Al foil as interlayer. However, if first using 2KW power and 4m/min travel speed, secondly using 3KW power and4m/min travel speed (defined as dual beam), only 25 μm Al foil can stabilize welding fusion pool. It is found that Al foil just store the Zn vapour in the single beam method and cannot mix with Zn to form Al-Zn binary alloy, because the laser heating is too fast that Zn has been vaporized before Al was melted. But Al can mix with Zn to form Al-Zn binary alloy in the dual beam method, therefore, the boiling temperature is raised to about 1600°C. So that, in laser lap welding of Zn coated (galvanized) sheet steel, the Al-Zn alloy will be more effective than Al metal for stabilizing welding process.

Characteristics of Fiber Laser Lap Welding of Pure Aluminum Multi-thin Plate

2013 ◽  
Vol 30 (9) ◽  
pp. 931-942 ◽  
Author(s):  
Yun Seok Yang ◽  
Eun Kyeong Park ◽  
Ka Ram Lee ◽  
Young Tae Yoo
Keyword(s):  
Fiber Laser ◽  
Thin Plate ◽  
Pure Aluminum ◽  
Laser Lap Welding ◽  
Lap Welding

157 Relation between Photoelastic Fringe and Welding Strength in Laser Lap Welding of Thermoplastic Plates

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 49-50
Author(s):  
Masafumi YAMAKAWA ◽  
Shinya HAYAKAWA ◽  
Takashi NAKAMURA ◽  
Tatsuya HASEGAWA
Keyword(s):  
Laser Lap Welding ◽  
Lap Welding ◽  
Welding Strength

A novel study on laser lap welding of refractory alloy 50Mo–50Re of small-scale thin sheet

Vacuum ◽  
2017 ◽  
Vol 136 ◽  
pp. 10-13 ◽  
Author(s):  
Peng Liu ◽  
Ke-yun Feng ◽  
Ge-ming Zhang
Keyword(s):  
Thin Sheet ◽  
Refractory Alloy ◽  
Small Scale ◽  
Laser Lap Welding ◽  
Lap Welding

Development of decoupled multi-physics simulation for laser lap welding considering part-to-part gap

2017 ◽  
Vol 29 (2) ◽  
pp. 022423 ◽  
Author(s):  
Erkan Caner Ozkat ◽  
Pasquale Franciosa ◽  
Dariusz Ceglarek
Keyword(s):  
Physics Simulation ◽  
Laser Lap Welding ◽  
Lap Welding
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