2011 Fiscal Year Final Research Report
Development of shearing process of ultra-high strength steel sheets using local resistance heating
| Project/Area Number |
21360360
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
MORI Kenichiro 豊橋技術科学大学, 大学院・工学研究科, 教授 (80127167)
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| Co-Investigator(Kenkyū-buntansha) |
ABE Yohei 豊橋技術科学大学, 大学院・工学研究科, 講師 (60402658)
MAENO Tomoyoshi 豊橋技術科学大学, 大学院・工学研究科, 助手 (80505397)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 超高張力鋼板 / 穴抜き加工 / 局部通電加熱 / 急速加熱 / 低加熱エネルギー荷重低減 / 切口面性状向上 / 金型寿命向上 |
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| Research Abstract |
Ultra-high strength steels sheets and die-quenched steel sheets were sheared by local resistance heating. Uniform temperature in the circular shearing zone was obtained by optimizing heating conditions, and the zone was punched just after the heating. For heating at 500℃of the die-quenched sheet, the punch load and the burnished surface area were about 1/3 smaller and 2 times larger than those for the cold punching, respectively, and the occurrence of delayed fracture around the punched hole was prevented.
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