| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a vehicle impact absorbing tool capable of manufacturing a lighter vehicle impact absorbing tool satisfying necessary rigidity. <P>SOLUTION: A manufacturing device 20 manufactures a bumper reinforcement 1 by performing the roll-forming of a metal plate 2 to manufacture a formed body 3 having a constant cross sectional shape in a rolling process B, and then, performing the high-frequency hardening of the formed body 3 and bending the formed body 3 in a high-frequency hardening/bending process D. <P>COPYRIGHT: (C)2008,JPO&INPIT |
