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Electric resistance welding
About: Electric resistance welding is a research topic. Over the lifetime, 16761 publications have been published within this topic receiving 154851 citations.
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TL;DR: In this article, a two-pass double side welding technique was developed, and a joint thickness of 21mm was decided so that a partial penetration weld can be attempted with lesser beam power.
134 citations
TL;DR: In this article, the peak temperatures attained at different points during deposition of weld beads in stainless steel and low carbon steel weld pads were compared, and the residual stress patterns developed, the change in the peak tensile stress with the deposition of welding beads and the relation between peak temperatures and residual stresses in the weld pads are discussed.
134 citations
TL;DR: In this article, a model based on a double-ellipsoidal volume heat source to simulate the gas metal arc welding (GMAW) heat input was developed to predict the temperature field and thermally induced residual stress in the hybrid laser-gas arc welding process, and it was found that an increase in welding speed can reduce the residual stress concentration in the as-weld specimen.
134 citations
TL;DR: In this article, a comparative study of RSW and FSSW on spot welding AHSS has been conducted and the results show a correlation found among microstructure, failure loads, energy requirements and bonded area for both spot welding processes.
Abstract: Efforts to reduce vehicle weight and improve crash performance have resulted in increased application of advanced high strength steels (AHSS) and a recent focus on the weldability of these alloys. Resistance spot welding (RSW) is the primary sheet metal welding process in the manufacture of automotive assemblies. Friction stir spot welding (FSSW) was invented as a novel method to spot welding sheet metal and has proven to be a potential candidate for spot welding AHSS. A comparative study of RSW and FSSW on spot welding AHSS has been completed. The objective of this work is to compare the microstructure and mechanical properties of Zn coated DP600 AHSS (1 . 2 mm thick) spot welds conducted using both processes. This was accomplished by examining the metallurgical cross-sections and local hardnesses of various spot weld regions. High speed data acquisition was also used to monitor process parameters and attain energy outputs for each process. Results show a correlation found among microstructure, failure loads, energy requirements and bonded area for both spot welding processes.
133 citations
TL;DR: In this paper, the effect of the set-up of the welding process parameters on waveform deposition has been investigated, and it is found that good weldability, good mechanical joint properties and acceptable process efficiency can be obtained for thin sheets through advanced power source regulation, especially over short circuiting, controlled polarity and electrode wire motion.
Abstract: There is an increased requirement in the automotive, food and medical equipment industries to weld heat-sensitive materials, such as thin sheets, coated thin plates, stainless steel, aluminium and mixed joints. Nevertheless, relevant innovations in arc welding are not widely known and seldom used to their maximum potential. In the area of gas metal arc welding welding processes, digitalisation has allowed integration of software into the power source, wire feeder and gas regulation. This paper reviews developments in the arc welding process, particularly the effect of the set-up of the welding process parameters on waveform deposition. It is found that good weldability, good mechanical joint properties and acceptable process efficiency can be obtained for thin sheets through advanced power source regulation, especially over short circuiting, controlled polarity and electrode wire motion. The findings presented in this paper are valuable for waveform and deposition prediction. The need is furthermore noted for an algorithm that integrates gas flow parameters and wire motion control, as well as a variable sensor on the tip of the electrode, permitting flexibility of control of the current and the voltage waveform.
133 citations