| 摘要 |
<p>A shear cutter comprises a frame, a fixed, lower blade mounted on the frame and a curved, upper blade mounted for movement relative to the lower blade on a pair of links pivotally attached to a yoke disposed above the blades. The yoke is reciprocated by a movable cylinder of an hydraulic piston and cylinder arrangement. A pair of slippers are pivotally mounted at opposite ends of the upper blade and engage against respective guides on the frame to prevent longitudinal movement of the upper blade. The upper blade is constrained by the links to move in such a manner that the point about which the upper blade pivots moves along the curved cutting edge thereof.</p> |
