GB761320A - Process for the bending of flat and profile steel plate - Google Patents

Abstract

761,320. Angular bending. VEB SCHWERMASCHINENBAU H. RAU. Oct. 27, 1954, No. 31017/54. Class 83 (4). [Also in Group XL (b)] A process for bending flat or profiled metal plate in which the plate is passed between rollers which extend one side more than the other, the more extended side forming the outer part of the bend, and which are adjustable to vary the pressure on the plate is characterized in that the pressure of the rolls is controlled during bending by means co-operating with a curved guide which the leading end of the plate being bent follows. A flanged plate 1, to be bent to form a ship rib, is fed between a driven roller 3 and a roller 2 carried by a plate 4 adjustable vertically by the rotation of eccentrics 5 and 6. The initial adjustment is effected by a hand wheel 7, turning eccentrics 5, 6. The hand wheel 7 is then uncoupled and a worm wheel 9, adapted to be rotated by a motor 12, coupled tothe eccentric 5 and the rolling is commenced. The leading end of the plate being bent follows a curved guide 13 and carries means which co-operate with the guide 13 so that as the end tends to deviate therefrom the roll pressure is increased or reduced accordingly to effect correction by causing the motor 12 to rotate the eccentric 5 one way or the other. The means may comprise a lever coupled to the motor, or as shown, a photo-electric cell 10, the output of which actuates the motor 12, in which latter case the guide 13 comprises a white wire on a black plate.