| 摘要 |
PURPOSE:To perform quickly and with high accuracy the adjustment of each roll by providing a bottom roll freely vertically movably on the freely vertically movable inner stand on the roll stand base for pipe forming having a freely vertically movable top roll and a side roll horizontally movably. CONSTITUTION:Rolls 21, 25, 26 are correctly combined by ascending with a control motor 42 the bottom roll 21 of the inner stand 31 incorporated to the roll stand 20 for pipe forming on a stand base 24 and by moving to the right and left with a hydraulic motor 36 the right and left side rolls 25, 26. An alignment is then performed by moving vertically the inner stand 31 with a control motor 30 and the top roll 17 on the stand base 20 is incorporated as well with its descent. The roll assembly and adjustment are performed quickly and with high accuracy compared with the conventional case of having performed the roll assembly by moving each roll respectively.
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