| 摘要 |
PURPOSE:To realize the forming of the long product of nonuniform section using no form by forging the long-sized blank whose both end parts are restrained by two manipulators in each section continuously in the longitudinal direction by the opposing die having the necessary die shape. CONSTITUTION:The upper die 55 and lower die 56 of a forging device 13 have the die shape corresponding to each section dividing a product in the longitudi nal direction, forging in order by dividing the blank 11 held by the clamping arm 14 of an manipulator 12 into the longitudinal direction. In the case, the blank 11 is forged with twisting it by the manipulator 12 with the longitudinal direction as (x) axis, the forging direction (y) axis and the direction at right angles with both axes (z) axis. This twisting restrains a root part N around each (y), (z) axial direction and each (x), (y) and (z) axes, restrains the other end side around each (y), (z) axial direction and each (y), (z) axes and the restraint around the (x) axis of the root part N is performed by giving in advance the twisting angle for the root part N of forging area. The forming of the long-sized product of nonuniform section using no form is thus realized.
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