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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.


Papers
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Journal ArticleDOI
TL;DR: In this paper, two modes of metal transfer phenomenon in FSW have been discussed with the help of three FSW techniques: a strip is welded to the plate by the process, in the second one the brass sheet is inserted perpendicular to the welding direction and in the third one the process is performed with tools having different pin lengths.
Abstract: It has been widely recognised that the fundamental mechanism of weld formation in friction stir welding (FSW) is too complex, a phenomenon to be understood completely. In the present study two modes of metal transfer phenomenon in FSW have been discussed with the help of three FSW techniques. In the first technique a strip is welded to the plate by the process, in the second one the brass sheet is inserted perpendicular to the welding direction and in the third one the process is performed with tools having different pin lengths. The results suggest a strategy to model the process particularly for predicting welding tool performance.

44 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of key welding parameters such as welding speed, defocusing distance, and laser-to-arc distance on overlap weldability of magnesium alloys sheets were analyzed, as well as the microstructure and properties of hybrid lap-welded joint.
Abstract: This paper presents the results of recent investigations on the overlap weldability of magnesium alloy AZ31B sheets by laser-arc hybrid welding process The effects of key welding parameters such as welding speed, defocusing distance, and laser-to-arc distance on overlap weldability of magnesium alloys sheets were analyzed, as well as the microstructure and properties of hybrid lap-welded joint The results showed that sound overlap-welded joints of magnesium alloy AZ31B sheets without defects can be obtained Among the welding parameters, defocusing distance and laser-to-arc distance were key factors to affect the penetration depth and bead shape It also found that the cross-section of hybrid overlap-welded joint appears a “thumb pin” shape due to the characteristics of laser-arc hybrid welding Hybrid overlap-welded joints can be divided into two parts: one was the zone of laser acting alone, while the other was the zone of laser and arc cooperation Besides, it was concluded that the tensile shear strength of AZ31B overlap-welded by laser-arc hybrid welding was 80% comparable to those of base metal, and the corrosion resistance of weld bead was equivalent to that of base metal in 5 mol% NaCl solution

44 citations

Proceedings ArticleDOI
TL;DR: In this article, a real-time feedback control algorithm was proposed to increase the robustness of the process by means of feedback control, based on several parameters that are monitored simultaneously during the process.
Abstract: In present-day industry, particularly in the area of microelectronics packaging and assembly, there is a strong demand for highly reliable, miniature joints of thin copper parts. Laser welding could be the perfect solution for making such joints if this process were not highly sensitive to various parameters, such as the reflectivity of the copper workpiece, the gap between the product parts to be welded, and laser-power density. The robustness of the process is further limited because two important product properties (reflectivity and heat conductivity) change strongly during welding. An investigation has been performed to increase the robustness by means of real-time feedback control, based on several parameters that are monitored simultaneously during the process. It is shown how this drastically decreases the influence of the above-mentioned variations with "heat conduction" welds. The control algorithm was based on an approximate model of the (non-linear) welding process. In addition, it is shown how adaptive feedforward control is required to cope with the limited response time of the system. Finally, some remarks are made on experiences iterative learning control. This investigation was part of the European co-operation project SLAPS, performed within the framework of the IMS/Brite-Euram III program. The support from the European Commission and the IMS regional offices is gratefully acknowledged.

44 citations

Patent
23 May 1963

44 citations

Patent
10 Nov 2010
TL;DR: In this article, a welding method for welding workpieces made of highly heat-resistant superalloys is provided, which includes generating a heat input zone on the workpiece surface by means of a heat source, feeding welding filler material into the heat input area by a feeding device, and generating a relative motion between the heat source and the feeding device on one hand and the work piece surface on the other hand by a conveying device.
Abstract: A welding method for welding workpieces made of highly heat-resistant superalloys is provided. The method includes generating a heat input zone on the workpiece surface by means of a heat source, feeding welding filler material into the heat input zone by means of a feeding device, and generating a relative motion between the heat source and the feeding device on one hand and the workpiece surface on the other hand by means of a conveying device. Furthermore, according to the welding method, the mass feed rate is ≦350 mg/min.

44 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023106
2022247
202168
2020162
2019184
2018245