| 摘要 |
PURPOSE:To perform the bending of a blank in the prescribed curvature size from the beginning with a small-sized and strong device by performing the guide and bending of the blank to be rolled by the upper and lower rolls with one side step by the inlet side guide directly provided on a bearing part and the outlet side approaching side roll. CONSTITUTION:A work blank 1 is rolled by the upper and lower rolls 2A, 3A having a stepped bank A at one side. The blank 1 is guided and pressed by the inlet side guide 11 directly provided on the housing 8 at the opposite side of the stepped bank A of the housings 7, 8 of roll bearings 5, 6 and by the side roll 4' provided by approaching to the outlet side. The blank 1 is subjected to bending by the approaching side roll4' from the beginning with preventing the side slippage of the blank 1 by the stepped part A by rolling the blank 1 by guiding it optimally. The bending of the succeeding side roll 4 is therefore made stable and correct and the blank 1 is worked in the prescribed size and curvature with a compact and strong device.
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