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  4. Process-integrated resistance spot welding testing using ultrasonic techniques
 
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1997
Journal Article
Title

Process-integrated resistance spot welding testing using ultrasonic techniques

Abstract
An ultrasonic test technique is presented which determines the temperature changes in the weld spot and weld nugget growth during resistance spotwelding. The ultrasonic signals are transmitted externally through the weld spot in a simple manner via the welding electrode on the one side and received by the electrode on the other. The size of the weld nugget can be computed on the basis of time-dependent changes in ultrasonic transmissivity during the welding process. The physical fundamentals on which this test method is based are explained and weld spot evaluation performed experimentally using iron and aluminium sheets. The completion of a prototype equipment was made possible thanks to the VALUE-I Programme of the European Community.
Author(s)
Waschkies, E.
Journal
Welding in the world  
Language
English
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Keyword(s)
  • non-destructive testing

  • ultrasonic testing

  • aluminium

  • spot welding

  • resistance welding

  • monitoring systems

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