Patent ID: 6779587
Filing Date: 2004-08-24
Classification: B22D

Abstract:
A method of adjusting roll segments (1) in a continuous casting installation for metal and rolls (1a) of which are sequentially adjusted in a segment upper frame (2) and a segment lower frame (3) by pairs of hydraulic piston-cylinder units (4) supported on frame cross-members (5) in position-controlled and pressure-controlled operations, the method comprising the steps of:switching, in response to an overload, the piston-cylinder units (4) of each roll segment (1), in following each other steps, from the position-controlled operation to the pressure-controlled operation for effecting at least one of guiding and pressing a casting strand (6) when pressure within a respective pair of the piston-cylinder units (4) reaches a predetermined maximum value; and displacing the respective pair of the piston-cylinder units (4) in a pressureless switching mode until in the switching mode, a predetermined gap (12) between an abutment (11) provided on the segment upper frame (2) and a lever arm (9b) of an adjustable displacement stop (7) that limits an adjustment path of the segment upper frame (2), is reached in a predetermined pivotal position (10) of the lever arm (9b), whereby a maximum gap between the roll segments and the strand (6) is provided, with a locking force being provided by weight of the segment upper frame and friction forces of a relative displacement of cylinders and pistons of the piston-cylinder units.