The Effect of Process Parameters on Weld Quality in Resistance Spot Welding Dual-Phase Steels

2009 ◽  
Vol 628-629 ◽  
pp. 553-556
Author(s):  
Chang Ming Qian ◽  
Yan Song Zhang ◽  
Xiao Yun Zhang ◽  
Guan Long Chen
Keyword(s):  
Process Parameters ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Control Process ◽  
Welding Process ◽  
Weld Strength ◽  
Dual Phase ◽  
Inspection Method ◽  
Resistance Spot ◽  
Weld Current

In order to reduce vehicle weight and improve crash performance, dual-phase (DP) steels are increasingly used for lightweight auto-body. the high cooling rates in Resistance spot welding (RSW) process will make the nugget very brittle and result in interfacial fracture modes. In this study, a servo resistance welding system is firstly introduced to control process parameters during the welding process. The influences of different process parameters (weld current, weld time and electrode force) on the weld strength, nugget diameter, facture modes and weld indentation are analyzed. Finally, an on-line weld failure mode inspection method is proposed based on servo gun’s feedback characteristics.

scholarly journals MULTI-OBJECTIVE OPTIMIZATION OF THE RESISTANCE SPOT-WELDING PROCESS PARAMETERS FOR THE WELDING OF DUAL-PHASE STEEL DP500

2021 ◽  
Vol 55 (2) ◽  
pp. 201-206
Author(s):  
Aleksija Djuric ◽  
Dragan Milčić ◽  
Damjan Klobčar ◽  
Biljana Marković
Keyword(s):  
Automotive Industry ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Mechanical Characteristics ◽  
Welding Process ◽  
Dual Phase ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Resistance Spot

Resistance spot welding (RSW) is still the most used form of welding in the automotive industry, primarily for welding steel. One of the advanced steels used in the automotive industry is dual-phase steel, so it is important to properly select the welding parameter for these steels. Therefore, this paper presents multi-objective optimization in the RSW welding process of DP 500 steel. The paper considers three different mechanical characteristics i.e., the failure load (F), failure displacement (l) and weld nugget diameter (D), as all these welding characteristics play significant roles in evaluating the quality of spot welding. The results show that the welding current is the most influential parameter with respect to the mechanical characteristics. The effect of welding time on the weld quality is the least significant. The optimal parameters for welding DP 500 steel obtained in this paper are weld current 8 kA, electrode force 4.91 kN and weld time 400 ms.

Optimization of resistance spot welding process parameters of dissimilar DP600/AISI304 joints using the infrared thermal image processing

2020 ◽  
Vol 108 (1-2) ◽  
pp. 211-221 ◽  
Author(s):  
Alejandro Espinel Hernández ◽  
Louriel Oliveira Villarinho ◽  
Valtair Antonio Ferraresi ◽  
Mario Sánchez Orozco ◽  
Angel Sánchez Roca ◽  
...  
Keyword(s):  
Image Processing ◽  
Process Parameters ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Thermal Image ◽  
Resistance Spot ◽  
Thermal Image Processing
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