Roll-holder cartridge for a rolling mill

Abstract

The present invention relates to a roll-holder cartridge for a rolling mill 20 . The cartridge 24 comprises two side walls 26 , a plurality of roll-lever units 30 , two adjusting rings 28 and an adjusting actuator 32 . Each side wall of the cartridge comprises a plurality of first seats 260 ; each adjusting ring comprises a plurality of second seats 280 ; and each one of the roll-lever units is mounted on the cartridge so as to be able to pivot about a pin 300 , each end of each pin being housed in the axial direction inside a first seat and a second seat, respectively. Moreover, the first seats allow a displacement of the respective pins in a purely tangential direction t; the second seats allow a displacement of the respective pins in a purely radial direction r, and the two adjusting rings may be rotated about the axis X by means of the adjusting actuator. The invention also relates to a rolling stand 22 comprising the cartridge described above and a rolling mill comprising a plurality of rolling stands 22.

1 - 10 . (canceled) 
     
     
         11 . A roll-holder cartridge for rolling a long article having an axis X, the roll-holder cartridge comprising:
 two side walls,   a plurality of roll-lever units,   two adjusting rings, and   an adjusting actuator,   wherein:
 each side wall of the cartridge comprises a plurality of first seats; 
 each adjusting ring comprises a plurality of second seats; 
 each of the roll-lever units is mounted on the cartridge so as to be able to pivot about a pin, each end of each pin being housed in the axial direction inside a first seat and a second seat, respectively; 
   and wherein:
 the first seats allow displacement of the respective pins in a purely tangential direction t; 
 the second seats allow displacement of the respective pins in a purely radial direction r; and 
 the two adjusting rings can be rotated about the axis X by means of the adjusting actuator. 
   
     
     
         12 . The roll-holder cartridge of  claim 11 , wherein each of the first seats comprises a recess and a slider block sliding inside the recess, a hole formed in the slider block being intended to receive a first portion of the end of the pin. 
     
     
         13 . The roll-holder cartridge of  claim 12 , wherein the form of each of the first seats is such that the slider block may slide inside the recess only in the tangential direction t. 
     
     
         14 . The roll-holder cartridge of  claim 11 , wherein each of the second seats comprises a recess and a slider block sliding inside the recess, a hole formed in the slider block being intended to receive a second portion of the end of the pin. 
     
     
         15 . The roll-holder cartridge of  claim 14 , wherein the form of each of the second seats is such that the slider block may slide inside the recess only in the radial direction r. 
     
     
         16 . The roll-holder cartridge of  claim 11 , wherein each adjusting ring comprises a radial lug and wherein the adjusting actuator acts on the radial lug. 
     
     
         17 . The roll-holder cartridge of  claim 11 , wherein the total working stroke d of the pin along the tangential direction t is between about 20 mm and about 30 mm and is preferably about 25 mm. 
     
     
         18 . The roll-holder cartridge of  claim 11 , wherein the adjusting actuator comprises a jack connected to a movable member and mounted on the cartridge so as to impart to the movable member a displacement along a radial direction r, the movable member comprising in turn an inclined guide inside which is a slidably housed slide comprising a hole which receives a pin fixed to the adjusting rings such that a radial displacement of the movable member causes a circumferential displacement of the pin and therefore a rotation about the axis X of the adjusting rings. 
     
     
         19 . A rolling stand comprising:
 a plurality of actuators,   a plurality of motor-reducer-spindle units; and   a roll-holder cartridge that comprises:
 two side walls, 
 a plurality of roll-lever units, 
 two adjusting rings and 
 an adjusting actuator, 
 wherein each side wall of the cartridge comprises a plurality of first seats; 
   each adjusting ring comprises a plurality of second seats; and each of the roll-lever units is mounted on the cartridge so as to be able to pivot about a pin, each end of each pin being housed in the axial direction inside a first seat and a second seat, respectively; and
 wherein the first seats allow displacement of the respective pins in a purely tangential direction t; the second seats allow displacement of the respective pins in a purely radial direction r, and the two adjusting rings can be rotated about the axis X by means of the adjusting actuator. 
   
     
     
         20 . The rolling stand of  claim 19 , wherein each of the first seats comprises a recess and a slider block sliding inside the recess, a hole formed in the slider block being intended to receive a first portion of the end of the pin. 
     
     
         21 . The rolling stand of  claim 20 , wherein the form of each of the first seats is such that the slider block may slide inside the recess only in the tangential direction t. 
     
     
         22 . The rolling stand of  claim 19 , wherein each of the second seats comprises a recess and a slider block sliding inside the recess, a hole formed in the slider block being intended to receive a second portion of the end of the pin. 
     
     
         23 . The rolling stand of  claim 22 , wherein the form of each of the second seats is such that the slider block may slide inside the recess only in the radial direction r. 
     
     
         24 . The rolling stand of  claim 19 , wherein each adjusting ring comprises a radial lug and wherein the adjusting actuator acts on the radial lug. 
     
     
         25 . The rolling stand of  claim 19 , wherein the total working stroke d of the pin along the tangential direction t is between about 20 mm and about 30 mm and is preferably about 25 mm. 
     
     
         26 . The rolling stand of  claim 19 , wherein the adjusting actuator comprises a jack connected to a movable member and mounted on the cartridge so as to impart to the movable member a displacement along a radial direction r, the movable member comprising in turn an inclined guide inside which is a slidably housed slide comprising a hole which receives a pin fixed to the adjusting rings such that a radial displacement of the movable member causes a circumferential displacement of the pin and therefore a rotation about the axis X of the adjusting rings. 
     
     
         27 . A rolling mill for rolling a long article, comprising:
 a plurality of rolling stands, wherein each rolling stand comprises:
 a plurality of actuators, 
 a plurality of motor-reducer-spindle units; and 
 a roll-holder cartridge that comprises:
 two side walls, 
 a plurality of roll-lever units, 
 two adjusting rings and 
 an adjusting actuator, 
 
 wherein each side wall of the cartridge comprises a plurality of first seats; 
   each adjusting ring comprises a plurality of second seats; each of the roll-lever units is mounted on the cartridge so as to be able to pivot about a pin, each end of each pin being housed in the axial direction inside a first seat and a second seat, respectively; and
 wherein the first seats allow displacement of the respective pins in a purely tangential direction t; the second seats allow displacement of the respective pins in a purely radial direction r, and two adjusting rings can be rotated about the axis X by means of the adjusting actuator. 
   
     
     
         28 . The rolling mill of  claim 27 , wherein each of the first seats comprises a recess and a slider block sliding inside the recess, a hole formed in the slider block being intended to receive a first portion of the end of the pin. 
     
     
         29 . The rolling mill of  claim 27 , wherein each adjusting ring comprises a radial lug and wherein the adjusting actuator acts on the radial lug. 
     
     
         30 . The rolling mill of  claim 27 , wherein the adjusting actuator comprises a jack connected to a movable member and mounted on the cartridge so as to impart to the movable member a displacement along a radial direction r, the movable member comprising in turn an inclined guide inside which is a slidably housed slide comprising a hole which receives a pin fixed to the adjusting rings such that a radial displacement of the movable member causes a circumferential displacement of the pin and therefore a rotation about the axis X of the adjusting rings.