| 摘要 |
PURPOSE:To forge a large-diameter ring by providing a free space for preventing an interference between a ring to be forged and a press. CONSTITUTION:A ring 100 to be forged is placed on each pair of rollers, and thereafter, an anvil 80 is fed into the inside of a press by driving a motor 56. Subsequently, pressurized oil is supplied to anvil lifting hydraulic cylinders 31, 32, the anvil 80 is lifted, the upper face part of both end parts of the anvil 80 is welded by pressure to pressure receiving surfaces 141, 142 of a window 14 of side frames 11, 12, and the ring 100 is lifted by a roller for rotating and feeding a ring to be forged. Next, the pressurized oil is fed to pressure cylinders 15, 16, a forming die is lifted, and the ring to be forged 100 is forged. Thereafter, the ring 100 is rotated and fed by driving the feed roller for rotating a ring to be forged, and the second forging is executed. When the whole circumference of the ring 100 is formed to a prescribed thickness, it is taken out of the inside of the press. |
