Levelling machine for levelling flat products in a continuous strip mill

摘要

A levelling machine with overlapping rollers incorporating a fixed housing (1) containing two levelling assemblies (2,2'). These assemblies (2,2') each comprises a number of active levelling rollers (21) with parallel axes mounted to rotate in a support frame (4) and each is combined with at least one row of support wheels (22). Each assembly is applied against a strong base (3) on the opposite side from the sheet to be levelled. The support frame (4) for at least one of the levelling assemblies (2) includes a holder (40) enclosing a number of adjacent crossbeams (5) individually mounted to slide in the holder (40). Each active roller (21) engages only one corresponding beam (5) via its support wheel (22), while each beam (5) individually engages the base (3) via at least two hydraulic rams (6) distributed along the beam (5). An individual regulation system is provided for each active roller so that it is possible to individually regulate the degree of overlap of each active roller and to modify the distribution of the levelling forces between the rollers even when the sheet is moving. The method used to put this levelling machine into service is also claimed.