| 摘要 |
In a flying drum shear (1), the upper and lower drums (11, 12) are so oriented that respective flattened portions (17, 18) thereof face each other and are symmetrical about the plane (8) of transit of the material to be cut; the drums (11, 12) and their supports (24, 26) constitute a unit which is movable as a whole in a vertical direction, and this unit is displaced vertically until the flattened portion (18) of the lower drum (12) is positioned immediately below the said transit plane (8) of the material to be cut to allow heavy gauge material (30) to pass through the drums (11, 12). |
