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Quality Evaluation of Resistance Spot Welding using Acoustic Emission  

Jo Dae-Hee (인천대학교 교육대학원 기계교육전공)
Rhee Zhang-Kyu (인천대학교 기계공학과)
Park Sung-Oan (인천전문대학 컴퓨터응용기계설계과)
Cho Jin-Ho (인천대학교 대학원 기계공학과)
Kim Bong-Gag (충청대학 항공.기계설계학부)
Woo Chang-Ki (인천대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.15, no.4, 2006 , pp. 98-104 More about this Journal
Abstract
In this paper, for the purpose of investigation the acoustic emission(AE) behaviors during resistance spot welding process and tension test of spec steels. As the results present the resistance spot welding method that can get suitable welding qualities or structural integrity estimating method. The resistance spot welding process consists of several stages: set-down of the electrodes; squeeze; current flow; forging; hold time; and lift-off. Various types of AE signals are produced during each of these stages. For tensile-shear test and cross tensile test in resistance spot welded specimens, fracture pa 야 ems are produced: tear fracture; shear fracture; and plug fracture. Tensile-shear specimens strength appeared higher than cross tensile specimens one. In case of tensile-shear specimen happened tear fracture that crack happens in most lower plate. Also, in case of cross tensile specimens, upper plate and lower plate are detached perfect fracture was exposed increases a little as acting force is lower than ordinary welding condition. Therefore, the structure which is combined by resistance spot welding confirmed that welding design must attain so that shear stress may can interact mainly.
Keywords
Acoustic Emission; Resistance Spot Welding; Tensile-Shear Test; Cross Tensile Test; Fracture Pattern; Quality Evaluation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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