SHEARLINE FOR TRIMMING PLATES AND SHEETS, IN PARTICULAR HEAVY PLATES, BY MEANS OF CIRCULAR CUTTER SHEARS

摘要

1300091 Shearing MOELLER & NEUMANN GmbH 12 Jan 1970 [24 Jan 1969] 1388/70 Heading B3W Double edge trimming disc cutters have means for driving the disc cutter pairs at substantially the same speed, and a continuously variable drive for producing limited relative rotary motion between the pairs to counteract the tendency of plates not to run straight through the shears. As shown, shafts 15 or 16 of the drives 6 and 7 respectively of the cutter pairs are coupled through a variable drive 17. The cage 20 of the variable drive 17 comprises a worm wheel rotatable by means of a worm 26 actuated by a reversible motor 25. If the plate veers to the right ahead of the shears, which can be detected visually or by means of edge-sensing means, the motor 25 is actuated to rotate the cage 20 in the sense to cause the drive for the left hand cutter pair to lag behind the drive for the right hand cutter pair by an amount depending on the duration of actuation of the motor. In an alternative embodiment individual drives for the cutter pairs are electrically synchronized and a differential gear is provided in the drive to one pair.