发明名称 |
DEVICE AND METHOD FOR PRODUCING CLOSED-CROSS-SECTION-STRUCTURE COMPONENT |
摘要 |
An object is to make it possible to manufacture, with high dimensional precision, a press-formed curved closed-structure part that has a curved surface in a bottom portion thereof while reducing the manufacturing cost by reducing the number of forming steps and the number of dies. Provided is a method for manufacturing a closed-structure part by forming a flat plate-shaped workpiece B into a closed structure including a bottom portion B1 that is curved along a longitudinal direction. The method includes a first forming step of forming a plurality of first out-of-plane deformed portions 10 and a bent portion B4, the first out-of-plane deformed portions 10 being formed at least in a region of the workpiece B corresponding to the bottom portion B1 and arranged along the longitudinal direction, each of the out-of-plane deformed portions having a recessed shape or a protruding shape; and a second forming step of squashing the first out-of-plane deformed portions 10 between a pad 4 and a punch 3 and bending bent portions B4 by pressing the punch 3 into a space between dies 5 while the region of the workpiece B corresponding to the bottom portion B1 is clamped between the pad 4 and the punch 3. |
申请公布号 |
EP2837436(B1) |
申请公布日期 |
2016.11.23 |
申请号 |
EP20120874022 |
申请日期 |
2012.04.13 |
申请人 |
JFE STEEL CORPORATION |
发明人 |
HIGAI, KAZUHIKO;YAMASAKI, YUJI |
分类号 |
B21C37/15;B21D5/01;B21D53/88 |
主分类号 |
B21C37/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|