GB1239165A - - Google Patents

Abstract

1,239,165. Straightening. VAN DORN CO. 23 July, 1969 [10 Dec., 1968], No. 36970/69. Heading B3E. [Also in Division C7] Buckling of a metal sheet is prevented or straightening of a buckled sheet is achieved in a quench unit which comprises a plurality of pairs of cylindrical pressure rolls R 1 , R 2 , R 3 , R 4 &c. of substantially the same diameter, said rolls presenting substantially continuous lines of contact with a member M being quenched transverse to its direction of motion, the nips of the roll pairs lying substantially in the same plane, means for rotatably driving at least one roll of each of the roll pairs at the same speed to pass the member M through the unit, means for independently adjusting the force that each roll pair exerts on the member M, and means J 1 , J 2 , J 3 , J 4 &c. for establishing quenching zones between said successive roll pairs for quenching member M on both sides. The rolls may be driven at the same rate by a chain drive, and back-up rolls may be provided, and both the pressure and back-up rolls may be hollow and cooled by circulating water. The quenching at the input end is by high pressure water jets and in the intermediate stages lower pressure jets are used, and flooding with water takes place toward the exit end. Back-up rolls split into adjustable units may be used to exert different pressures across the width of the sheet to prevent buckling or straighten an already buckled sheet.