scholarly journals Simulative and experimental investigations on the influence of force during single-sided resistance brazing on sheet metal tube connections as an alternative to single-sided resistance spot welding

2020 ◽  
Vol 2 ◽  
pp. 100031
Author(s):  
M. Najuch ◽  
S. Jüttner ◽  
D. Schmicker
Keyword(s):  
Sheet Metal ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Experimental Investigations ◽  
Metal Tube ◽  
Resistance Spot

scholarly journals Optimization of the Process Parameters of Resistance Spot Welding of AISI 316l Sheets Using Taguchi Method

2019 ◽  
Vol 23 (1) ◽  
pp. 64-69
Author(s):  
P. Muthu
Keyword(s):  
Shear Stress ◽  
Taguchi Method ◽  
Process Parameters ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Sheet Thickness ◽  
Experimental Investigations ◽  
Tensile Shear ◽  
Optimal Process ◽  
Resistance Spot

Abstract Resistance spot welding (RSW) is a fabrication process that is being used in the automobile and aerospace industry since many years for joining low carbon or “mild” steel. Quality and strength of the welds depend upon the process parameters of RSW. The most effective parameters in this process are: current intensity, welding time, sheet thickness and material, geometry of electrodes, electrode force, and current shunting. This paper presents the experimental investigations for the optimization of tensile shear stress of RSW for stainless steel grade 316L sheets by using Taguchi method. The experiments were conducted using Taguchi’s L27 orthogonal array under varying process parameters, namely electrode diameter, welding current, and heating time. The experimental data were analyzed using signal-to-noise ratio (S/N ratio) to find the optimal process parameters. Analysis of variance (ANOVA) and F test were used to find the most significant parameters affecting the spot weld quality characteristics. Confirmation tests with optimal process parameters were conducted to validate the test results. From the results, it was found that it is possible to increase tensile shear stress significantly.

Effect of Electrode Tip Shape on Strength and Microstructure in Resistance Spot Welding of AZ31B Magnesium Alloy

2011 ◽  
Vol 239-242 ◽  
pp. 2528-2532 ◽  
Author(s):  
Hui Liu ◽  
Ming Gang Wang ◽  
Xiao Qing Zhang ◽  
Wei Dong
Keyword(s):  
Magnesium Alloy ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Experimental Investigations ◽  
Fracture Feature ◽  
Resistance Spot ◽  
Truncated Cone ◽  
Welding Joints ◽  
The Difference

The effect of electrode tip shape on strength and microstructure of weld spot in resistance spot welding of AZ31B Mg alloy was studied by experimental investigations. The results show that electrode tip shape which leads to the difference of contact area,current density and temperature at the sheet/ sheet interface have dominant effect on tensile shear strength and microstructure of weld spot. It was found that weld spot had lower strength and smaller deformation by the spherical-flat electrodes compared to the double truncated cone electrodes, and better property of weld joints can be obtained by truncated cone electrodes. At the same time defects, fracture feature and formation causes were analyzed in order to improve the quality of magnesium alloy spot welding joints.

Experimental Investigations on Capabilities of Resistance Spot Welding and MIG Brazing for Producing Corrugated Beams Using Galvanized Steel Sheets

2021 ◽  
Vol 1164 ◽  
pp. 47-54
Author(s):  
Bogdan Radu ◽  
Viorel Ungureanu ◽  
Ioan Both ◽  
Mircea Burcă ◽  
Ştefan Benzar ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Materials Science ◽  
Research Work ◽  
Steel Structures ◽  
Galvanized Steel ◽  
Experimental Investigations ◽  
Steel Beams ◽  
Resistance Spot ◽  
Steel Sheets

This paper summarized the research work carried out by a team from Department of Steel Structures and Structural Mechanics, together with Department of Materials Science and Engineering, from University Politehnica Timisoara, which tried to determine the possibility to use welding for obtaining built-up cold-formed steel beams made of corrugated galvanized steel sheets (grade S350GD+Z). There were analyzed two joining processes: MIG brazing and Resistance Spot Welding with the aim to replace the self-drilling screws used until now. The results are very promising and these solutions of joining have beside economic advantages also technical and quality ones.

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