| 摘要 |
<p>A roll leveller (31) for metal sheets, comprising a plurality of levelling rolls (R1-R21), a plurality of adapter shafts (11, 12), a plurality of torque limiters (40, 40')· Each adapter shaft (11, 12) is arranged for actuating at least one of the levelling rolls (R1-R21) and drives or is driven by one of the torque limiters (40, 40'). Each of the torque limiters (40, 40') is arranged for limiting, to a predetermined limit torque, the maximum driving torque that the relative adapter shaft (11, 12) can transmit to a relative levelling roll (R1-R21), driving it, and is provided with a torque regulator (100, 100') arranged for varying the predetermined limit torque also when the leveller (31) is levelling the metal sheet to be processed (L). Each of the torque limiters, or in any case, each adapter shaft (11,12) is arranged for actuating the relative levelling roll (R1-R21) also after reaching the predetermined limit torque.</p> |
