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    • 3. 发明专利
    • METHOD FOR WORKING INNER PERIPHERAL IRON PLATE
    • JPH07265961A
    • 1995-10-17
    • JP6236594
    • 1994-03-31
    • SHINWA PACKAGE KKKAWASAKI STEEL CO
    • YAMAKAWA MASAOIWANO KENJIIWATA MASAOTANIGUCHI SHIGEKIYAMADA YASUHIRO
    • B21D5/14
    • PURPOSE:To provide a working method for an inner peripheral iron plate with which the cylindrical working of the inner peripheral iron plate and the keeping of a cylindrical shape are executed in one step. CONSTITUTION:Between a metallic roll 21 and elastic roll 22 which are arranged in parallel so as to be possible to approach and separate, rotate and drive, the inner peripheral iron plate 5 of a flat plate shape on which a piece 6 of an adhesive tape is fixed in a tongue shape in the edge part of the rear end is entered and delivered backward while continuously bending and forming the plate into a circular-arc shape by holding and pressing with the metallic roll and the elastic roll. By pushing this bended inner peripheral iron plate into the inside along the inner peripheral surface of a fixed guide ring through a slit-shaped opening part of the fixed guide ring 24 having approximately C-shaped cross section which is arranged around the metallic roll 21, the edge part 5a at the front end and the edge part 5b at the rear end are overlapped after forming the iron plate into a cylindrical shape and the piece 6 of the adhesive tape in the edge part of the rear end is fixed in the edge part of the front end by passing these overlapped edge parts of the front and rear ends through between the metallic roll 21 and the elastic roll 22.