| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for drawing a pipe with rolls by which the pipe is drawn into a fine round shape without causing deformation such as wrinkles in the drawing part even when the wall thickness of the pipe is small and the opening ratio of the drawing part to the pipe is small. SOLUTION: The drawing is performed by rotating while pressing work rolls 2 against the outer peripheral surface of the drawing part 31 with the rolls and rotating the pipe 3 and the work roll 3 relatively in the state where force by which the pipe 3 is extended in the axial direction is imparted centering around the drawing part 31 with the rolls. COPYRIGHT: (C)2005,JPO&NCIPI
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