Patent ID: 7467533

Claim:
A method for changing rapidly at least one working roll of a roll stand ( 2 ) implementing a roll displacement device ( 10 ) provided on a first side of the stand and capable of moving a roll according to the axis thereof, along a loading axis (C, C′) of the stand, for simultaneously extracting from the stand a roll to be replaced ( 8 , 9 ) and loading in the stand a substitute roll ( 8 ′, 9 ′), wherein said displacement device is of the push-pull type, wherein each roll ( 8 , 9 , 8 ′, 9 ′) is fitted by fastening means ( 100 ) at a first end towards the first side of the stand and by matching fastening means ( 200 ) at a second end towards the second side opposite to the first side, said displacement device ( 10 ) being fitted with such matching fastening means ( 300 ), wherein the substitute roll ( 8 ′, 9 ′) may be placed on anyone of the two sides of the stand, respectively the first side and the second side, wherein the displacement device ( 10 ) is actuated by pulling when the substitute roll ( 8 ′, 9 ′) is placed on the second side for simultaneously extracting the roll to be replaced ( 8 , 9 ) towards the first side and loading the substitute roll from the second side after coupling the fastening means ( 100 ) and the matching fastening means ( 200 ) of the roll to be replaced ( 8 , 9 ), respectively with the matching fastening means ( 300 ) of the displacement device ( 10 ) and with the fastening means ( 100 ′) of the substitute roll ( 8 ′, 9 ′), and wherein the displacement device ( 10 ) is actuated by pushing when the substitute roll ( 8 ′, 9 ′) is placed on the first side of the stand, for simultaneously loading the substitute roll ( 8 ′, 9 ′) from the first side and extracting the roll to be replaced ( 8 , 9 ) towards the second side, after coupling the fastening means ( 100 ′) and the matching fastening means ( 200 ′) of the substitute roll ( 8 ′, 9 ′), respectively with the matching fastening means ( 300 ) of the displacement device ( 10 ) and with the fastening means ( 100 ) of the roll to be replaced ( 8 , 9 ), the various fastening means ( 100 , 100 ′) and matching fastening means ( 200 , 200 ′, 300 ) being decoupled from one another after displacement and the roll to be replaced ( 8 , 9 ) then being in standby, close to the stand of the rolling mill, ready to be used as a substitute roll, for later change of rolls.