| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direct welding apparatus which reduces variance of welding strength in series welding in resistance welding and which improves low productivity in the direct welding apparatus. Ž<P>SOLUTION: The direct welding apparatus is characterized in that it includes a welding power source 1, a first and a second pressurizing mechanisms 4, 5, a first and a second upper electrodes 6, 7, and a first and a second lower electrodes 12, 13, and that they are electrically connected in series. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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