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    • 111. 发明专利
    • MANUFACTURING APPARATUS FOR SPIRAL TANK
    • JPS5594732A
    • 1980-07-18
    • JP243779
    • 1979-01-12
    • MITSUBISHI HEAVY IND LTD
    • SHIODA HIROSHIMASUMOTO MASANORI
    • B21C37/12B21D51/18B21D51/24B23K9/00B23K9/032B23K31/00B23K37/00
    • PURPOSE:To make unnecessary the drive of huge weight even in case of manufacturing a tank of large diameter, and to make easy the assembly and disassembly of the manufacturing apparatus, by elevating and rotating only the manufacturing apparatus without rotating the tank body, in the manufacturing method for the tank with the steel strip being fed through the horizontally swiveling arm. CONSTITUTION:The pole 5 for supporting the forming device is detachably stood at the center of the tank's bottom plate 1 placed on the foundation; and the horizontal swivel arm 11 is attached to this pole 5. On this arm 11, the steel strip 4 is passed through the leveler 6, strip seamer-cutter 7, feed roll 8, and forming rolls 9 being located at least in three points; after that, the tip of strip 4 is welded to outer surface of the bottom plate 1. Hereafter, the holding frame 15 is guided by the lower roll 13 fixed to the holding frame 15 taking as the guide the bottom plate 1 or outer surface of the strip 4 wound in advance. At the same time, the strip 4, after being formed into the specified curvature, is spirally fed in good order, and is wound and welded at its both side edges by the seam welder 10. When the tank is formed to the required height, the pole, forming device, etc., are disassembled and removed away, and then, the top cover of the tank is built up by welding.