GB926188A - Wire cutting mechanism - Google Patents

Abstract

926,188. Shearing. PREFORMED LINE PRODUCTS CO. Nov. 17, 1959, No. 38935/59. Class 83 (4). A cutting mechanism comprises a rotatable member, a knife mounted thereon and movable to a cutting position where it projects beyond the periphery of the member, a stationary cooperating shearing edge, means for guiding the stock to be cut along a path parallel to the axis of rotation of the member and across the path of the knife, means for projecting the knife after a predetermined number of revolutions of the rotatable member and means for driving the said member. The rotary member comprises a flywheel 13, mounted on a hollow spindle 20 and driven by a motor 15. Journalled in the spindle 20 is a shaft 30, which is driven through a layshaft 24 to run in the same direction as, but at a lower speed than the hollow spindle 20. A cam 52 is adjustably secured to the shaft 30 by bolts which pass through arcuate slots 55. Mounted on the flywheel is a guide block 44 in which slides a carriage 42. The carriage supports a roller 50, which follows the cam 52 under the influence of a spring 58, and also supports a knife 40 with a cutting portion 41 which co-operates with a shear edge 61. The velocity ratio between the spindle 20 and the shaft 30 is determined by the sizes of the pulleys 27, 28, 34 and 35 and is arranged to cause the knife 40 to project after the flywheel has completed a predetermined number of revolutions. A wire to be cut is fed as a continuous length along a guide 60 and across the shear edge 61, to be cut by the knife 40 when the required amount is over-hanging the edge. The carriage 42 may be operated by a crank and connecting rod, and the velocity ratio between the spindle 20 and the shaft 30 by an epicyclic gear. A solenoid may be used to project the cutter, in association with a timing device.