Development of advanced resistance spot welding process using control of electrode force and welding current during welding
| Autor: | Yasuaki Okita, Toshio Terasaki, Koichi Yasuda, Moriaki Ono, Rinsei Ikeda |
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| Rok vydání: | 2012 |
| Předmět: |
Heat-affected zone
Materials science Mechanical Engineering Metallurgy technology industry and agriculture Metals and Alloys Welding respiratory system Electric resistance welding Surfaces Coatings and Films law.invention Mechanics of Materials law Electrode Cold welding Spot welding Upset welding Nugget Formation |
| Zdroj: | Welding International. 28:13-20 |
| ISSN: | 1754-2138 0950-7116 |
| Popis: | In resistance spot welding of thin sheet–thick sheet–thick sheet joint, when the sheet thickness ratio is large (sheet thickness ratio = total thickness of sheet joint/thickness of the thin sheet positioned on the outside of the joint), how to stably secure the nugget between the thin sheet and the adjoining thick sheet is a key issue. If the sheet thickness ratio is so large, nugget formation between the thin sheet and thick sheet is extremely difficult. In order to control of the nugget (position of formation, shape, etc. of the nugget) during welding for three sheets joint with a high sheet thickness ratio, optimum welding process was investigated. The developed ‘two-step force, two-step current’ welding process was suitable for high sheet thickness ratio joint and relaxed the constraints on the sheet thickness ratio. In Step 1 (first part of welding period) of the welding process, a nugget is reliably formed between the thin sheet and thick sheet by applying conditions of low electrode force, short we... |
| Databáze: | OpenAIRE |
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