US 7,467,533 B2
	Method and apparatus for rapidly changing a working roll of a roll stand
Jean-Claude Badiou, Veauche (France)
Assigned to Siemens Vai Metals Technologies SAS, Saint-Chamond (France)
Filed on Jan. 04, 2007, as Appl. No. 11/649,371.
Claims priority of application No. 06 50031 (FR), filed on Jan. 04, 2006.
Prior Publication US 2007/0186611 A1, Aug. 16, 2007
Int. Cl. B21B 31/08 (2006.01)

U.S. Cl. 72—239  [72/238]

22 Claims

1. 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.