Topic
Spot welding
About: Spot welding is a research topic. Over the lifetime, 12491 publications have been published within this topic receiving 89845 citations. The topic is also known as: Spot_welding.
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TL;DR: In this article, the effect of shunt currents on the thermal and electrical behavior of the welding process is investigated through theoretical and experimental analysis, and the theoretical results obtained from a numerical analysis of the modelling of the shunt effect are compared with experimental ones.
Abstract: One of the important factors in practical welding situations is shunt effect which deteriorates weld quality due to a shunt current which flows in the exis- ting spot Previously, this effect has not been analytically investigated, since the mechanism of shunt effect shows very complicated phenomena in the thermal and electrical behavior In this paper this effect is extensively studied through theoretical and experimental analysis The theoretical results obtained from a numerical analysis of the modelling of shunt effect are compared with experimental ones Both results show good agreement and represent well the mechanism of shunt effect
31 citations
TL;DR: In this paper, a statistical process control method is introduced to analyze the process consistency by employing moving range (MR) chart to provide the high frequency information of the electrode displacement curve, and a case study demonstrates the validity and effectiveness of the methodology.
31 citations
TL;DR: In this article, the effect of the boron content on the tensile-shear strength of the RSW was investigated and the equations to calculate the shear and tensile shear load were suggested for the specimens fractured at interfacial and pull-out failure modes respectively.
31 citations
TL;DR: In this paper, a 7 s spot gas-tungsten arc (SGTA) welding at 1 g (g = 9.8 m/s2) and 5 g accelerations was performed on Clarkson University's multigravity research welding system (MGRWS).
Abstract: Convective flow during arc welding processes mainly depends on electromagnetic force, Marangoni force, and buoyancy force. The Marangoni flow (caused by surface tension gradient,dγ/dT)and the buoyancy driven flow are the major factors in controlling weld penetration in austenitic stainless steels, such as types 304 and 316. Alloys 304 and 316 were subjected to a 7 s spot gas-tungsten arc (SGTA) welding at 1 g (g = 9.8 m/s2)and 5 g accelerations. The welds at 5 g were performed on Clarkson University’s multigravity research welding system (MGRWS). The cross sections of the fusion zones were polished/etched, and their depth (D)and width (W)were measured to ± 0.025 mm. It was determined that the depth/width ratio (D/W)of the welds decreased as the acceleration increased from 1 to 5 g. This result indicates that increase in buoyancy driven flow will produce wider but shallower welds during SGTA welding.
31 citations
TL;DR: In this paper, the local strain energy density (SED) was used to summarise more than 400 fatigue data from steel spot welds in lap-shear joints, coach-peel specimens and cross-tension specimens of small thickness.
31 citations