Degradation mechanism of electrode tip during resistance spot welding of aluminium alloy sheets

Kondo Masatsune, Nagata Hiroshi, Nishimura Akihisa, Kokawa Hiroyuki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study investigated the electrode life and the electrode degradation characteristics during resistance spot welding of aluminium alloy sheets. When a long welding time and the DR type electrode shape were used, the electrode life was much longer than that with a short welding time and the R type electrode shape. The degradation mechanism of electrode tip was explained in the following way; firstly, Al-Cu alloy layers were formed at the electrode top during consecutive welding, and then the layers stuck easily to the surfaces of aluminium alloy sheets so that notable wear took place and the surface profile of electrode tip became flat. In order to eliminate the direct contact between the electrode and the sheet, a special Cu-foil insert device for resistance spot welding of aluminium alloy sheets was developed and achieved an extremely long electrode life.

Original languageEnglish
Pages (from-to)177-186
Number of pages10
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Volume28
Issue number2
DOIs
Publication statusPublished - 2010

Keywords

  • Aluminium alloy sheet
  • Electrode degradation mechanism
  • Electrode life
  • Electrode tip
  • Resistance spot welding

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys

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