Rolling mill, roll stand, as well as method for replacing roll stands in a rolling mill

Abstract

In order to allow simple replacement of the roll stands in the case of a rolling mill for rolling elongated material, having multiple roll stands disposed in a line, forming a central caliber opening, wherein the roll stands are disposed in a stand position, in each instance, and can be displaced into at least one change position, in each instance, each stand position has an intake coupling, and the intake coupling has a coupling part on the roll stand side, as well as a coupling part on the drive side, wherein the drive-side coupling part is provided in axially fixed manner on the stand position.

1 . Rolling mill for rolling elongated material, having multiple roll stands ( 12 ) disposed in a line, forming a central caliber opening, wherein the roll stands ( 12 ) are disposed in a stand position ( 57 ), in each instance, and can be displaced into at least one change position ( 58 ,  59 ), in each instance, wherein each stand position ( 57 ) has an intake coupling, and the intake coupling has a coupling part ( 11 ) on the roll stand side, as well as a coupling part on the drive side, wherein the drive-side coupling part is provided in axially fixed manner on the stand position ( 57 ). 
     
     
         2 . Rolling mill according to  claim 1 , further comprising two intake couplings per roll stand ( 12 ) and per stand position ( 57 ), wherein the two intake couplings are in effect axial to their axes of rotation ( 15 ), in each instance, and the axes of rotation ( 15 ) are oriented parallel, and wherein the two intake couplings are disposed on one side of the line. 
     
     
         3 . Rolling mill according to  claim 1 , wherein a drive having a drive motor ( 51 ) is provided on at least one stand position ( 57 ), which motor is connected with a distributor gear mechanism ( 52 ), which has at least two power take-offs, wherein the power take-offs, in each instance, have a drive-side coupling part of an intake coupling. 
     
     
         4 . Rolling mill for rolling elongated material, having multiple roll stands ( 12 ) disposed in a line, forming a central caliber opening, wherein the roll stands ( 12 ) are disposed in a stand position ( 57 ), in each instance, and can be displaced into at least one change position ( 58 ,  59 ), in each instance, wherein the change position ( 58 ) is provided on a change carriage ( 54 ), wherein the change carriage ( 54 ) has at least one further change position ( 59 ). 
     
     
         5 . Rolling mill according to  claim 4 , wherein the change carriage ( 54 ) has at least four change positions ( 58 ,  59 ), one change position ( 58 ) and one further change position ( 59 ), in each instance, for two stand positions ( 57 ), in each instance, wherein the two change positions ( 58 ) are spaced apart from one another in accordance with the distance between the two stand positions ( 57 ), and the two further change positions ( 59 ) are spaced apart from one another in accordance with the distance between the two stand positions ( 57 ). 
     
     
         6 . Rolling mill according to  claim 5 , wherein the change positions ( 58 ) and the further change positions ( 59 ) are spaced apart from one another, in each instance, by the width of a roll stand ( 12 ), preferably by the distance between the stand positions ( 57 ). 
     
     
         7 . Rolling mill according to  claim 1 , further comprising at least one roll stand extraction apparatus ( 55 ) having a hydraulic extraction cylinder. 
     
     
         8 . Rolling mill having at least two driven rolls ( 2 ,  3 ) and having at least two intakes ( 1 ), wherein each intake ( 1 ) has a coupling part ( 11 ) on the roll stand side, and the coupling parts ( 11 ) on the roll stand side are oriented in parallel and in the same direction. 
     
     
         9 . Rolling mill having at least four driven rolls ( 2 ,  3 ), wherein two rolls ( 2 ,  3 ), in each instance, are mounted on a common stand part, wherein the two stand parts in turn are mounted on a stand body. 
     
     
         10 . Rolling mill according to  claim 9 , wherein an intake ( 1 ) as well as two rolls ( 2 ,  3 ) oriented perpendicular to one another are provided per stand part. 
     
     
         11 . Rolling mill according to  claim 10 , wherein the rolls ( 2 ,  3 ) are connected to act with one another by way of two bevel gears ( 7 ,  8 ) that mesh with one another, preferably having a cone angle of 45°. 
     
     
         12 . Rolling mill according to  claim 11 , wherein the two bevel gears ( 7 ,  8 ) that mesh with one another are disposed in a cassette ( 6 ). 
     
     
         13 . Rolling mill having rolls for absorbing rolling forces that occur during rolling of elongated material, comprising a stand body that has at least two metal stand sheets ( 13 ), wherein the metal stand sheets ( 13 ) are disposed parallel to one another and perpendicular to the rolling forces. 
     
     
         14 . Rolling mill according to  claim 13 , wherein bracket pieces ( 14 ) are provided, corresponding to the number of rolls ( 2 ,  3 ), which pieces absorb the rolling forces and transfer them to the metal stand sheets ( 13 ). 
     
     
         15 . Rolling mill for absorbing rolling forces that occur during rolling of elongated material, comprising a hydraulic overload security device. 
     
     
         16 . Rolling mill according to  claim 15 , wherein overload cylinders ( 20 ) that communicate with one another are provided in accordance with the number of rolls ( 2 ,  3 ). 
     
     
         17 . Method for replacing roll stands ( 12 ) in a rolling mill, wherein at least two roll stands ( 12 ) are displaced from their rolling position ( 61 ) to a common side and to change positions ( 58 ,  59 ) that are spaced apart from one another by at least one roll stand width, wherein the two roll stands ( 12 ) are displaced by a roll stand width, together with at least one further roll stand ( 12 ), before the further roll stand ( 12 ) is then displaced into its rolling position ( 61 ). 
     
     
         18 . Method for replacing roll stands ( 12 ) in a rolling mill, wherein at least one intake ( 1 ) of a roll stand ( 12 ) is connected with a drive on a stand position ( 57 ), by way of an intake coupling, in that a drive-side coupling part remains fixed in place, and the roll stand ( 12 ), with the coupling part ( 11 ) on the roll stand, is displaced in such a manner that the intake coupling closes.