发明名称 |
Manufacturing method for irregular-section tubular body and axle beam for torsion beam |
摘要 |
<p>The present invention intends to provide a manufacturing method of an irregular-section tubular body in which a manufacturing process is simplified, and complexing and large-sizing of an equipment, and increase of an equipment cost are avoided. <??>In the manufacturing method of the present invention, a tubular worked body 1 sealed liquid W therein is press-formed by a press upper mold 6 and a press lower mold 3. One of the press upper and lower molds has one convex mold portion 3a to form a concave portion la concaved in an axis perpendicular direction at an axial part. The press-forming of the worked body to the tubular body is completed by one stroke process by using a liquid pressure increasing as decrease of internal volume of the worked body due to formation of the concave portion. Thus, liquid in the worked body is not pressurized by a pressurizing device after the press-forming. <IMAGE></p> |
申请公布号 |
EP1134047(A2) |
申请公布日期 |
2001.09.19 |
申请号 |
EP20010105703 |
申请日期 |
2001.03.07 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
UENO, YUKIKAZU;SHIMADA, SETSUKO;SANO, TETSUJI |
分类号 |
B21D22/10;B60G9/04;B21D17/02;B21D26/033;B21D26/041;B21D26/043;B21D53/88;B60B35/00;B60G21/05;(IPC1-7):B21D53/90;B21D26/02 |
主分类号 |
B21D22/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|