| 摘要 |
<p>1470473 Flying shear AETNA STANDARD ENG CO 26 Feb 1975 [7 March 1974] 8080/75 Heading B3W A flying shear comprises crank-shafts 9, 10 having blade holders 16, 18 rotatably mounted on their respective crank-pins 12, 14, means for rotating the crank-shafts simultaneously and in opposite directions and links 28, 30 respectively connecting holders 16, 18 to a member 33 movable in a fixed path parallel to the feed path of stock T to be sheared. The shear 9 is driven from a motor via belts and a flywheel (53) (Fig. 2, not shown) clutched to the shaft 9 by operation of a solenoid valve (59) in response to a signal from a measuring wheel 71 in a straightener U. A valve (67) operating a brake (62) on one shaft 10 is actuated by a simultaneous signal from the wheel 71. The member 33 is a sleeve slidable on a guide 34 through which the stock T, particularly tubing, is fed and brackets 29, 31 on the links 28, 30 pivot (42) on the sleeve 33. Blades 17, 19, with cutting edges notched to correspond to the tube section, are mounted in their holders by readily removable wedges (24), Fig. 3 (not shown). To vary the cutting clearance, the relative angular position of the shafts 9 and 10 is varied by adjusting the wedge mounting of one or both gears (51), (52) transmitting the drive from shaft 9 to shaft 10.</p> |
