Characterization of Nugget Development under Electrode Wear Conditions in Resistance Spot Welding

Paper #:
  • 982363

Published:
  • 1998-09-29
Citation:
Lu, F. and Dong, P., "Characterization of Nugget Development under Electrode Wear Conditions in Resistance Spot Welding," SAE Technical Paper 982363, 1998, https://doi.org/10.4271/982363.
Author(s):
Affiliated:
Pages:
6
Abstract:
The effects of electrode wear on nugget development during resistance spot welding are major concerns in auto-body assembly and manufacturing. By considering detailed electrode-sheet interactions using advanced finite element modeling procedure, this paper presents a framework for detecting the electrode wear conditions and associated nugget development characteristics. Two important in-process parameters are studied in detail. They are the electrode movement and the dynamic resistance. It is found that the second-order derivative of the electrode movement and the first-order derivative of the dynamic resistance can be correlated in a fundamental form to identify the detailed nugget development process under various electrode wear conditions.
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