Patent ID: 7743638
Filing Date: 2010-06-29
Classification: B21B

Abstract:
1. Method for operating an adjusting cylinder, comprising a piston (KO), which is frictionally movable in a housing with at least two parts (G 1 , G 2 ) that define a cylinder, the piston being movable between three pressure surfaces (A 1 , A 2 , A 3 ) of the housing, and which acts on a chock (ES) of a rolling stand, the piston (KO) being equipped with two oppositely directed piston rods (ST 1 , ST 2 ), the two housing parts having coaxially arranged bores through which the piston rods (ST 1 , ST 2 ) pass, a first of the pressure surfaces (A 1 ) being formed on one side of the piston (KO) by the first piston rod (ST 1 ) and being smaller than an oppositely directed annular, second of the pressure surfaces (A 2 ) formed on an opposite side of the piston (KO) by the second piston rod (ST 2 ), a third of the pressure surfaces (A 3 ) being formed so as to face a free end of the second piston rod (ST 2 ), wherein, for rapid advance of the piston (KO), pressure is applied to the first surface (A 1 ), while no pressure is applied to the second and third surfaces (A 2 ) or (A 3 ) and (A 3 ) or (A 2 ).