| 摘要 |
High-speed flying shears and method employing the same with contrarotating blades (13) and scrap-shearing blades (18) fitted side by side to blade-holder drums (30), which is suitable to shear bars (11) travelling at 120 meters per second or more, the shears comprising upstream a first one-channel switch (16) of a start/stop type and downstream a second one channel switch conveying the bars (11) lengthwise and capable of being oriented in synchronization laterally by rotation on a plane substantially containing the axis of travel of the bars (11) and parallel to, and between, the planes containing the axes (12) of rotation of the pair of blade-holder drums (30) so as to make the bars (11) pass in the shearing area (35), the circumferential position of the blades (13) being associated with the lateral position of the first one-channel switch (16) at least in the transient moment of the passing of the bars (11) in the shearing area (35), the first and second switches (16-20) having at least a first extreme position (A-A'), a second extreme position (D-D') and a position for the passage of a bar (E), the position (E) for the feed of the bar (11) being in the vicinity of the first shearing blades (13) and located on the same side as the second extreme position (D-D').
|
