Patent Publication Number: US-7721580-B2

Title: Apparatus for rotationally locking a roller-mill roll in a bearing mount in a mount window of a rolling-mill frame

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
   This application is the US national phase of PCT application PCT/EP2006/004463, filed 12 May 2006 and claiming the priority of German patent application 102005022440.7 itself filed 14 May 2005, whose entire disclosures are herewith incorporated by reference. 
   FIELD OF THE INVENTION 
   The invention relates to an apparatus for rotationally locking a rolling-mill roll in a bearing mount in a mount window of a rolling-mill frame. 
   BACKGROUND OF THE INVENTION 
   When changing such rolls one normally uses rail systems with whose help the rolls are shifted with their bearing mounts through the mount windows of the rolling-mill frame. These rails and the equipment used for such an operation take a great deal of space up at the roll frame and make it difficult to mount or move other equipment needed for rolling. 
   It has therefore been suggested to change rolls by means of a support beam, a so-called porter bar. To this end the stub of the roll is connected to a porter bar suspended from a crane, and the roll is lifted in this position out of the frame. With this method there is the problem that the bearing mount rotates on the roll as it is being moved. 
   OBJECT OF THE INVENTION 
   The object of the invention is to provide an apparatus that rotationally locks the bearing mount to the roll during removal, transport, and reinstallation in the roll frame and until it is reconnected to the drive element. 
   SUMMARY OF THE INVENTION 
   This object is achieved by an axially shiftable cylindrical housing fitted to the stub of the roll, having a planar flange that in one position of the housing bears on an abutment face of an abutment element fixed in the bearing mount so that the cylindrical housing is rotationally locked in the bearing mount. Further according to the invention the housing is a cylindrical flange ring having the flange with a planar face. Further features of the invention are described in the dependent claims. 

   
     BRIEF DESCRIPTION OF THE DRAWING 
     The invention will be more closely described with reference to the embodiment of the apparatus shown in the drawing. In the drawing in a schematic illustration: 
       FIG. 1  is a radial section through a roll stub and slide housing in the direction of the bearing mount; 
       FIG. 2  is a side view of the section of  FIG. 1 ; 
       FIG. 3  is a view of another radial section like  FIG. 1 ; 
       FIG. 4  is a side view of  FIG. 3 ; and 
       FIG. 5  is a detail of the view of  FIG. 3 . 
   

   SPECIFIC DESCRIPTION 
   As shown in  FIGS. 1 and 2  a roll stub WZ carries an axially shiftable flange sleeve FB having a flange ring FR and a planar outer flange FA. A bearing mount LS has abutments AS with abutment faces for the planar flange FA of the flange ring FR. As shown in  FIG. 2  the roll stub WZ is fitted to the drive element TR of the roll drive, and the lower face of the flange ring FR is supported in the bearing mount LS on springs SF that push the flange ring FR against an end face of the drive element TR. In this position the planar flange FA of the flange ring FR is offset from the abutments AS so that the roll stub WZ with the flange ring FR can rotate freely in the bearing mount LS. If the roll stub WZ is separated from the drive element TR as shown in  FIG. 4  to carry off the roll, the springs SF push the flange ring FR in the bearing mount LS into a position in which its abutment faces AF bear on the abutments AS and the flange ring is blocked against rotation on the roll stub WZ. This blocking is effective until the roll with the bearing mount LS is fitted to the roll frame and the roll stub WZ is fitted to the drive element TR to shift the flange ring FR back into the  FIG. 2  position.