Results 211 to 220 of about 2,407 (262)

Extracting weld penetration information in tungsten—inert gas welding

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2002
Weld pool images provide abundant information about weld penetration while the weld penetration has a close relationship with the back weld width. The key to achieving weld penetration control is to establish a model describing the relationship between the front-side geometrical parameters of the weld pool and the back weld width with sufficient ...
J Gao, C Wu
exaly   +2 more sources

Welding phenomena and weld penetration during laser or hybrid welding

PICALO 2010: 4th Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication, 2010
Laser and hybrid welding phenomena for the production of sound and deep welds are described from the observation results of plume behavior, plume-laser interaction, keyhole behavior and melt flows on the surface and inside the molten pool through high speed video cameras and X-ray transmission imaging system.
Seiji Katayama, Yousuke Kawahito, Masami Mizutani   +2 more
openaire   +1 more source

Weld Penetration Sensing And Control

SPIE Proceedings, 1988
Penetration depth is a key variable, which needs to be controlled to ensure defect-free welds. One of the major problems involved with adaptive control penetration is the lack of suitable variables which can be viewed directly by the sensor. A proposed sensing technique is to relate the invisible variables, such as penetration depth and thickness of ...
W. H. Chen, S. Nagarajan, B. A. Chin
openaire   +1 more source

The research of welding parameters on weld shape in the laser deep penetration welding

2010 International Conference on Mechanic Automation and Control Engineering, 2010
The research of welding parameters, such as surface absorption rate, laser power, welding speed on laser welding process, weld depth and weld width are discussed by means of finite element simulation. In the article, it takes 5A06 aluminum alloy welding as the example to build the finite element model.
null Hu Min-ying, null Shi-Junwei, null Cai-jinjin Li-xin, null Xing-yanqiu   +3 more
openaire   +1 more source

Capillary waves on the weld pool in penetration welding with a laser

Journal of Physics D: Applied Physics, 1989
In penetration welding with a laser, a ripple pattern is frozen into the weld bead. The causes of this are not clear but the frequencies most readily observed are likely to be related to the natural frequencies of oscillation of the weld pool when in its molten state.
N Postacioglu, P Kapadia, J Dowden
openaire   +1 more source

Fluid flow and weld penetration in stationary arc welds

Metallurgical Transactions A, 1985
Weld pool fluid flow can affect the penetration of the resultant weld significantly. In this work, the computer simulation of weld pool fluid flow and its effect on weld penetration was carried out. Steady-state, 2-dimensional heat and fluid flow in stationary arc welds were computed, with three driving forces for fluid flow being considered: the ...
Sindo Kou, D. K. Sun
openaire   +1 more source

Weld penetration control in gas tungsten arc welding (GTAW) process

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
In this paper a predictive control system is developed to control the weld penetration in GTAW process. An innovative 3D vision based sensing system is used to measure the weld pool characteristic parameters in real-time. Weld penetration specified by the back-side bead width as output feedback is calculated by a neuro-fuzzy model using weld pool ...
YuKang Liu, YuMing Zhang
openaire   +1 more source