| 摘要 |
PURPOSE: A rear subframe of a vehicle is provided so that a rigidity is maintained and at the same time, more light subframe structure is obtained, by molding with a hydroforming technique. CONSTITUTION: A rear subframe of a vehicle comprises a pair of side members(100), a front cross member(300) and a rear cross member(500). Each of the side members is composed of both ends(120,140) connected to a vehicle body, and a central part(160) connected to a wheel. The central part is bent inside the vehicle in comparison to the both ends so that the side members are molded in a streamline form. The front and rear cross members connect the central parts of both side members. The beads(342) longitudinally projected at each outer circumferential surface of the front and rear cross members are integrally molded in the hydroforming technique. Each of the side members is formed as a tube form in the hydroforming technique.
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