Recent developments in resistance welding~Synchronization of current and pressure in spot welding

1937 ◽  
Author(s):  
J. S. Williams
Keyword(s):  
Spot Welding ◽  
Resistance Welding ◽  
Recent Developments

Friction Stir Spot Welding of AZ31B Magnesium Alloy

2017 ◽  
Vol 867 ◽  
pp. 105-111
Author(s):  
S. Ramesh Babu ◽  
M. Nithin ◽  
S. Pavithran ◽  
B Parameshwaran
Keyword(s):  
Shear Strength ◽  
Magnesium Alloy ◽  
Rotational Speed ◽  
Spot Welding ◽  
Dwell Time ◽  
Friction Stir Spot Welding ◽  
Resistance Welding ◽  
Hardness Distribution ◽  
Tool Rotational Speed ◽  
Friction Stir

The Electrical Resistance Welding (ERW) of Magnesium and Aluminium is more difficult than steel because the welding machines must provide high currents and exact pressures in order to provide the heat necessary to melt the magnesium for proper fusion at the interface in order to produce a sound weld. Further, resistance welding of magnesium requires a backup plate made of steel to conduct the heat to the workpiece material. To overcome this problem, Friction Stir Spot Welding (FSSW) has been developed. In this study, the hardness distribution and the tensile shear strength of FSSW welds in the AZ31B Magnesium alloy has been investigated and it has been found that tool rotational speed and dwell time plays a major role in determining the weld strength. From the experimental study, a tool rotational speed of 1100 rpm and dwell time of 20 s produced good shear strength of 2824 N and the corresponding grain size was 4.54 μm. This result is very well supported by microstructural examinations and hardness distribution studies.

Evaluation of Resistance Spot Welding Conditions Using Experimental Design

2012 ◽  
Vol 1481 ◽  
pp. 97-102
Author(s):  
D.Y. Medina ◽  
R. Bermejo ◽  
R.T. Hernandez ◽  
I. Hernandez ◽  
S. Orozco
Keyword(s):  
Experimental Design ◽  
Statistical Model ◽  
Factorial Design ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Breaking Strength ◽  
Evaluation Process ◽  
Resistance Welding ◽  
Post Induction ◽  
Welding Steel

ABSTRACTThe breaking strength that can withstand solder is known as resistance welding, low resistance welding will cause a failure of the weld. This study optimized the effect of the main variables in a welding steel proceess on the mechanical propierties of the steel like the resistance welding. The main variables studied were electrode, machine, post induction, and dotted pressure. The factors that have the most influence in the resistance welding are the post induction, and the combination of post induction and the raw material.The statistical model used for the evaluation process was an analysis of variance (ANOVA) in a full crossing factorial design 2k with a second order of interaction.

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