| 摘要 |
A hydroforming tube which enables the flange part to be easily bonded to peripheral parts through spot welding by welding one end of the workpiece and a lower portion of the flange part of the workpiece, thereby manufacturing the tube after bending one edge of the workpiece to form a flange part in a process of forming a metal sheet type workpiece into a tube shape, and a method for manufacturing the hydroforming tube are provided. In a hydroforming tube manufacturing method for forming a metal sheet type workpiece into a tube shape, a method for manufacturing a hydroforming tube comprises the steps of: feeding a metal sheet(14); bending an one edge of the metal sheet to form a flange part(12) with a predetermined length on a portion of the metal sheet except a portion required for tube forming; forming the metal sheet into a circular tube(10) by roll forming; welding one end of the tube and a lower portion of the bent flange part to each other; and unfolding the bent flange part in a radius direction.
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