Topic
Arc welding
About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.
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01 Jan 1983
TL;DR: In this article, specific weld faults were intentionally introduced into an arc-welding process, and the resulting surface isotherms were observed with a scanning infra-red camera for both stationary and moving arcs.
Abstract: This paper was presented at the Annual AWS Convention, Philadelphia, Pa., Apr. 1983. The Authors present experimental results that could aid in the development of a closed-loop feedback system capable of correcting for perturbations that arise during automatic arc-welding. Specific weld faults were intentionally introduced into an arc-welding process, and the resulting surface isotherms were observed with a scanning infra-red camera for both stationary and moving arcs, Each fault produced a recognisably different distribution of the surface temperature. The results are presented and discussed in some detail, and it is concluded that infra-red thermography appears to be a suitable sensor for incorporation into a closed-loop feedback system for continuous process and quality controlled welding.
67 citations
TL;DR: In this paper, the main investigation directions performed at the Department of Materials Technology and Welding are presented: Weldability of HSLA steel and factors influencing susceptibility to cold cracking of welded joints.
Abstract: Underwater Welding - A Review The paper describes principles of underwater welding and recent trends in research works undertaken for enhance welding technology and properties of underwater welds. Department of Materials Technology and Welding at Gdansk University of Technology (GUT) has been involved in underwater welding research for over 25 years. Investigations include technology of underwater welding, and weld properties examinations. All tests have been performed with the use of self designed stands allow to perform welds in shallow depths as well as the depths up to 1000 m. The main investigation directions performed at the Department of Materials Technology and Welding are presented: Weldability of HSLA steel and factors influencing susceptibility to cold cracking of welded joints. The effects of wet welding conditions on diffusible hydrogen amount in the welds. The effects of heat input, underwater welding depths and composition of shielded gases on welds toughness.
67 citations
TL;DR: In this article, the Al 5052 alloy was joined to hot-dip aluminized steel sheets using low-heat-input cold metal transfer (CMT) arc welding, and four kinds of filler wires (Al 4043, 4047, 5356, 5183) were examined in the dissimilar metal joint.
67 citations
TL;DR: In this article, the authors describe various aspects of robotic welding, programming and problems associated with the technique and present a practical case application of sensors for semi-autonomous robotic welding.
Abstract: Technical innovations in robotic welding and greater availability of sensor-based control features have enabled manual welding processes in harsh work environments with excessive heat and fumes to be replaced with robotic welding The use of industrial robots or mechanized equipment for high-volume productivity has become increasingly common, with robotized gas metal arc welding (GMAW) generally being used More widespread use of robotic welding has necessitated greater capability to control welding parameters and robotic motion and improved fault detection and fault correction Semi-autonomous robotic welding (ie, highly automated systems requiring only minor operator intervention) faces a number of problems, the most common of which are the need to compensate for inaccuracies in fixtures for the workpiece, variations in workpiece dimensions, imperfect edge preparation, and in-process thermal distortions Major challenges are joint edge detection, joint seam tracking, weld penetration control, and measurement of the width or profile of a joint Such problems can be most effectively solved with the use of sensory feedback signals from the weld joint Thus, sensors play an important role in robotic arc welding systems with adaptive and intelligent control system features that can track the joint, monitor in-process quality of the weld, and account for variation in joint location and geometry This work describes various aspects of robotic welding, programming of robotic welding systems, and problems associated with the technique It further discusses commercially available seam-tracking and seam-finding sensors and presents a practical case application of sensors for semi-autonomous robotic welding This study increases familiarity with robotic welding and the role of sensors in robotic welding and their associated problems
66 citations
Journal Article•
TL;DR: In this article, resistance spot welding was used to weld aluminum alloy to steel from process development to performance evaluation, and the results showed that the alloy was more robust to steel than aluminum.
Abstract: Summary of work on resistance spot welding aluminum alloy to steel from process development to performance evaluation.
66 citations