| 摘要 |
In a flying shear an upright frame is provided with an opening forming a passageway for moving stock to be cut. A stationary blade is mounted on the frame above the opening. A movable blade is reciprocably mounted on the frame for movement toward and away from the stationary blade by a pitman connected with a crank arm coaxially connected with a gear wheel journalled by the frame. Spaced-apart spur gears, mounted on the frame in mesh with the gear wheel, are respectively connected with and driven by a pair of power cylinders for moving the pitman in a to and fro stock cutting stroke in response to shear signal operated electrical and pressure responsive valve means connected with the power cylinders and a control operated cog wheel interposed between the spur gears. Frame connected tilting cylinders, energized with the shear signal, tilt the frame in the direction of stock movement during the cutting action.
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