通電中の加圧力および溶接電流制御を活用した抵抗スポット溶接技術の開発 Development of Advanced Resistance Spot Welding Process Using Control of Electrode Force and Welding Current during Welding

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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 out side 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 "2-step force, 2-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 welding time, and high current. In the subsequent Step 2 (second part of welding period), a nugget is formed between the two thick sheets by apply high welding force and a long welding time. In the weld results of a three sheet joint (0.7mm+2.3mm+2.3mm; sheet thickness ratio: 7.6) using mild steel GA (0.7mm) as the thin sheet and 780MPa high strength GA (2.3mm) in the two thick sheets, "2-step force, 2-step current" spot welding process showed the wide available welding current range.

収録刊行物

  • 溶接学会論文集 : quarterly journal of the Japan Welding Society

    溶接学会論文集 : quarterly journal of the Japan Welding Society 28(1), 141-148, 2010-12-31

    一般社団法人 溶接学会

参考文献:  6件中 1-6件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10030149888
  • NII書誌ID(NCID)
    AN1005067X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    02884771
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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