A novel method to eliminate the corona bond effect in detecting resistance spot welding joints based on ultrasonic vortex C-Scan technique

2021 ◽  
Author(s):  
Bo Zhang ◽  
Baojun Zhang ◽  
Weiming Cai ◽  
Lang Wang ◽  
Yitao Zhang
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Resistance Spot ◽  
Novel Method ◽  
Welding Joints ◽  
Bond Effect

scholarly journals Quality Prediction of Resistance Spot Welding Joints From Pre- and Post-Welding Inputs Using Stacking of Tree Ensemble Models

2021 ◽  
Author(s):  
Óscar Martín ◽  
Virginia Ahedo ◽  
José Ignacio Santos ◽  
José Manuel Galán
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Characteristic Curve ◽  
Welding Process ◽  
Quality Level ◽  
Ensemble Models ◽  
Resistance Spot ◽  
Single Output ◽  
Combined Use ◽  
Welding Joints

Abstract Resistance spot welding (RSW) is a widespread manufacturing process in the automotive industry. There are different approaches for assessing the quality level of RSW joints. Multi-input-single-output methods, which take as inputs either the intrinsic parameters of the welding process or ultrasonic nondestructive testing variables, are commonly used. This work demonstrates that the combined use of both types of inputs can significantly improve the already competitive approach based exclusively on ultrasonic analyses. The use of stacking of tree ensemble models as classifiers dominates the classification results in terms of accuracy, F-measure and area under the receiver operating characteristic curve metrics. Through variable importance analyses, the results show that although the welding process parameters are less relevant than the ultrasonic testing variables, some of the former provide marginal information not fully captured by the latter.

scholarly journals Independence of EPR and PAP tests performed on resistance spot welding joints

2017 ◽  
Vol 52 (6) ◽  
pp. 418-424 ◽  
Author(s):  
Virginia Ahedo ◽  
Óscar Martín ◽  
José Ignacio Santos ◽  
Pilar De Tiedra ◽  
José Manuel Galán
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Pap Tests ◽  
Resistance Spot ◽  
Welding Joints
Sign in / Sign up

Export Citation Format

Share Document