| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an indirect spot welding method capable of obtaining stably a suitable go stone-shaped nugget, irrespective of total thickness of layered metal sheets. <P>SOLUTION: Three time zones t<SB POS="POST">1</SB>, t<SB POS="POST">2</SB>, t<SB POS="POST">3</SB>divided into three from the start of electrification are provided as to a pressurization force of an electrode and a current value of electrification, in the indirect spot welding method. Pressurization is executed by a pressurization force F<SB POS="POST">1</SB>(N) expressed by F<SB POS="POST">1</SB>in a formula and the electrification is executed by a current value C<SB POS="POST">1</SB>(kA) expressed by C<SB POS="POST">1</SB>in the formula, in the initial time zone t<SB POS="POST">1</SB>, pressurization is executed by a pressurization force F<SB POS="POST">2</SB>(N) expressed by F<SB POS="POST">2</SB>in the formula and the electrification is executed by a current value C<SB POS="POST">2</SB>(kA) expressed by C<SB POS="POST">2</SB>in the formula, in the next time zone t<SB POS="POST">2</SB>, and pressurization is executed by a pressurization force F<SB POS="POST">3</SB>(N) expressed by F<SB POS="POST">3</SB>in the formula and the electrification is executed by a current value C<SB POS="POST">3</SB>(kA) expressed by C<SB POS="POST">3</SB>in the formula, further in the next time zone t<SB POS="POST">3</SB>, wherein T represents the total sheet thickness (mm) of the layered metal sheets. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
