Results 221 to 230 of about 2,407 (262)

Dynamic evolution of the weld pool reflection during weld penetration development

2016 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), 2016
Weld pool surface is believed to contain sufficient information to determine the weld penetration from which skilled welders are able to control the welding process to desired penetration states. However, it is unclear how human welders extract the weld penetration from the observed weld pool surface.
Jinsong Chen, Jian Chen 0033, Zhili Feng, YuMing Zhang   +3 more
openaire   +1 more source

Effect of welding speed on weld formation in electron beam welding with continuous penetration

Welding International, 2014
Investigations were carried out into the conditions of free formation of welded joints in electron beam welding in the flat position with continuous penetration, and also into the dynamic model of the discharge of liquid metal of the weld pool from the root in which the metal moves downwards at a higher speed in the initial stage; but during movement ...
Ye.V. Terentyev, V.K. Dragunov, A.P. Sliva, A.V. Scherbakov   +3 more
openaire   +1 more source

Laser penetration spike welding: A microlaser welding technique enabling novel product designs and constructions

Journal of Laser Applications, 2003
A novel method for laser penetration microspot welding of sheet metal is presented. With this so called “laser spike-welding,” large gap tolerances are allowed. Depending on the ratio of laser spot radius to top plate thickness, gaps of 100% of the top layer thickness and more can be bridged.
Dijken, D.K, Hoving, W., de Hosson, J.T.M.   +2 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

Fatigue analysis of cruciform welded joint with weld penetration defects

Engineering Failure Analysis, 2021
Abstract For the fabrication of steel structures such as steel bridges, offshore structure etc, welding is nowadays considered as an efficient metal joining process. The type of fillet welded cruciform joint are widely used in construction of long spanned bridges with improved design and increased weld quality.
WangSub Shin, Kyong-Ho Chang, Shazia Muzaffer   +2 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

Dynamic Correlation Between Weld Pool Shape and Weld Penetration

Materials: Volume 2 — Intelligent Manufacturing and Material Processing; Clever Optimal Design and Control of Materials and Structures; Finite Deformation Viscoplasticity, 1995
Abstract The weld pool can provide accurate and instantaneous information about the weld penetration. In this paper, a nonmalized model is proposed to characterize the weld pool. It is shown that the weld penetration is correlated with the proposed three characteristic parameters of the weld pool.
Yu M. Zhang, Lin Li, Radovan Kovacevic
openaire   +1 more source

Neurofuzzy control of weld penetration in gas tungsten arc welding

Science and Technology of Welding and Joining, 2003
AbstractIn the present paper, a method using the surface geometrical parameters of the weld pool to control the weld penetration is developed. Because detection of the weld penetration is problematic and the back side maximum weld width can reflect weld penetration to some extent, a model describing the relationship between the weld pool surface ...
J. Gao, C. Wu
openaire   +1 more source

Deep penetration welds and welding phenomena with combined disk lasers

ICALEO 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2011
Recently high-power, high-quality disk lasers are developed to produce deep penetration welds. This study was carried out to produce deep-penetration weld beads and to interpret the effect of combined beams on welding results and phenomena by using high power disk lasers of 10 kW and 16 kW. It was consequently confirmed that twin spots welding with the
Seiji Katayama, Masahiro Hirayama, Masami Mizutani, Yousuke Kawahito   +3 more
openaire   +1 more source

Automatic Control of Weld Penetration

1978
Abstract : The objective of this project was to incorporate an infrared thermal probe with the previously developed weld penetration controller to improve penetration control of welds in 3/8 in.-thick ESR 4340 armor. The weld penetration control system works satisfactorily and reproducibly. The welding process used was gas tungsten arc.
openaire   +1 more source