Topic
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 paper, the simultaneous effects of welding parameters on tensile strength and hardness were obtained through two separate equations, and the optimized values of welding process parameters to achieve desired mechanical properties were evaluated.
50 citations
TL;DR: In this paper, 304L stainless steel was bonded by MIG welding and mechanical and microstructural properties of the welded samples were investigated by means of bending test and microscopic investigations.
50 citations
Patent•
05 Feb 2013TL;DR: Welding systems including welding torch assemblies are provided as discussed by the authors, where welding torch assembly may include a welding torch adapted to be utilized in a welding operation to establish a welding arc between the welding torch and a workpiece.
Abstract: Welding systems including welding torch assemblies are provided. The welding torch assembly may include a welding torch adapted to be utilized in a welding operation to establish a welding arc between the welding torch and a workpiece. Shielding gas may be supplied to the welding torch for establishment of a gas shielding area around a weld pool. The welding torch assembly may also include a temperature sensing system having a non-contact temperature sensor coupled to the welding torch and adapted to sense a temperature of the workpiece at a location outside of the molten weld pool.
50 citations
Journal Article•
TL;DR: In this paper, a monitoring system has been developed to collect process data during single-phase alternating current (AC) and medium-frequency direct current (MFDC) inverter resistance welding.
Abstract: Automotive industry interest in aluminum is growing rapidly in Europe and North America. Resistance spot welding and weldbonding will be key techniques in the volume production of aluminum vehicles. A monitoring system has been developed to collect process data during single-phase alternating current (AC) and medium-frequency direct current (MFDC) inverter resistance welding. Features extracted from the captured data are used to characterize spot welding and to identify a range of process phenomena. Statistical analysis has been applied to investigate the relationship between the extracted features and the conventional physical parameters, e.g., weld size and static tensile strength. Welding trials using both MFDC and AC welding equipment have been carried out using aluminum of different gauges and surface conditions. Results on the Al-Mg alloy AA-5754 have shown that the monitoring methods developed previously for steel do not appear to be generally applicable to aluminum. No single parameter can accurately quantify weld quality. Multiple regression methods can, however, provide good prediction of nugget diameter and static strength. This has proved effective even when only electrical variables are logged, removing the need for measurement of other process signals, e.g., electrode displacement or force.
50 citations
TL;DR: In this article, a new method that combines laser autogenous welding, laser wire filling welding and hybrid laser-GMAW welding to weld 30mm thick plate using a multi-layer, multi-pass process is described.
Abstract: This paper details a new method that combines laser autogenous welding, laser wire filling welding and hybrid laser-GMAW welding to weld 30 mm thick plate using a multi-layer, multi-pass process. A “Y” shaped groove was used to create the joint. Research was also performed to optimize the groove size and the processing parameters. Laser autogenous welding is first used to create the backing weld. The lower, narrowest part of the groove is then welded using laser wire filling welding. Finally, the upper part of the groove is welded using laser-GMAW hybrid welding. Additionally, the wire feeding and droplet transfer behaviors are observed by high speed photography. The two main conclusions from this work are: the wire is often biased towards the side walls, resulting in a lack of fusion at the joint and the creation of other defects for larger groove sizes. Additionally, this results in the droplet transfer behavior becoming unstable, leading to a poor weld appearance for smaller groove sizes.
50 citations