DISPOSITIVO PER IL POSIZIONAMENTO ED IL BLOCCAGGIO DI UN PEZZO INCORPORATO SU UN PERNO DEL CILINDRO AL MONTAGGIO ED ALLO SMONTAGGIO DI UNA SERIE DI CILINDRI IN O DA UNA GABBIA DI LAMINAZIONE

摘要

A rolling mill has a rolling stand having two roll standards for supporting rolls having roll pins at opposite ends of each roll with bearings interposed between the standards and the pins. A chock (10) surrounds each bearing and is releasably secured within a standard. A housing (12) is detachably secured on an outer side of the chock. The housing carries stop elements (14) mounted for movement in a direction parallel to the axis (13-13) of the roll. A first hydraulic jack (16) advances the stop elements toward a midplane (33-33) of the roll and into abutment with the roll, thereby to position the housing correctly along the roll axis. A plurality of clamping elements (21) is spaced apart about an endwise outer part (34) of the roll pin (8). A second hydraulic jack (25) moves the clamping elements into clamping engagement with the outer section (34) of the roll pin (8). A coil compression spring (29) releases the clamping elements when the second jack is released and a leaf spring (24) moves the clamping elements out of engagement with the outer section (34) of the roll pin (8). Another coil compression spring (17) retracts the stop elements (14) from engagement with the roll pin (8) when the first jack (16) is deactivated.