Apparatus for cross cutting coiled strip into rectangular and oblique angled plates and cutting off acute angles

An automatic line for cross cutting a coiled strip into rectangular and oblique-angled plates and for cutting off sharp angles, comprising, in successive arrangement:

• decoiling means;
• a drive means for linearly moving the strip being decoiled;
• pivoted guillotine shears for cutting plates off the strip at an adjustable angle in the strip's plane;
• non-pivoted guillotine shears for cutting off sharp angles at a constant angle to the direction in which the strip is being fed;
• means for the removal of cut-off plates from the zone between said shears;
• means to receive and stack the cut-off plates;
• means for adjustable displacement of said non-pivoted shears in the zone downstream of said pivoted shears in the direction of the strip feed in order to ensure a prescribed distance between said shears and to cut off sharp angles simultaneously with cutting off plates;
• said means for moving said strip being provided with a pair of driven rollers which are set into rotation by a first step electrohydraulic drive by means of a reduction gear;
• pulse means to control said first step electrohydraulic drive to accelerate, feed, and brake said strip, as well as to reverse its motion, all with the aid of the same driven rollers, in order to ensure a prescribed plate length;
• a second step electrohydraulic drive for said pivoted shears, said second step electrohydraulic drive controlling the angle at which said pivoted shears are arranged with respect to the strip's plane;
• means to synchronize the operation of both said step electrohydraulic drives connected to said drives for turning said pivoted shears through a prescribed angle simultaneously with feeding the strip by the driven rollers, whereby a plate is cut off the strip and is at the same time chamfered at a prescribed angle.