Method and device for rolling a rolling stock in a rolling mill with a cross-rolling mill

Abstract

The invention relates to a rolling mill for rolling stock to be rolled ( 6 ), having a planetary cross-rolling mill ( 20 ) and a subsequent further rolling mill in the rolling direction, the subsequent mill comprising a mandrel rod ( 10 ) having a length that is larger than the distance between the planetary cross-rolling mill ( 20 ) and the further rolling mill in the rolling direction.

1 .- 8 . (canceled) 
   
   
       9 . A rolling mill for rolling a rolling stock, comprising:
 a planetary cross-rolling mill;   an additional rolling mill arranged downstream of the planetary cross-rolling mill in a rolling direction; and   a mandrel rod having a length that is greater than a distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction.   
   
   
       10 . The rolling mill of  claim 9 , further comprising a holder which holds the mandrel rod in a position where the mandrel rod extends through a rolling gap of the planetary cross-rolling mill and protrudes at least partially into a rolling gap of the additional rolling mill. 
   
   
       11 . The rolling mill of  claim 10 , further comprising a linear drive which linearly moves the holder of the mandrel rod. 
   
   
       12 . The rolling mill of  claim 9 , wherein the additional rolling mill is a longitudinal rolling mill. 
   
   
       13 . The rolling mill of  claim 9 , wherein the mandrel rod is formed in several parts. 
   
   
       14 . The rolling mill of  claim 9 , further comprising a measuring device arranged between the additional rolling mill and the planetary cross-rolling mill, wherein the measuring device measures a rotation of the rolling stock. 
   
   
       15 . The rolling mill of  claim 9 , further comprising a rotor surrounding the rolling stock; planetary rollers rotatably supported in the rotor; a main drive for rotating the rotor; and an additional drive for rotating the planetary rollers about respective longitudinal axes. 
   
   
       16 . A method for rolling a rolling stock in a rolling mill having a planetary cross-rolling mill and an additional rolling mill arranged downstream in a rolling direction, said method comprising the steps of:
 arranging the rolling stock, during a time period when the rolling stock is rolled, both in a rolling gap of the planetary cross-rolling mill and also in a rolling gap of the additional rolling mill; and   extending a mandrel rod through the rolling stock while the rolling stock is arranged both in the rolling gap of the planetary cross-rolling mill and also in the rolling gap of the additional rolling mill,   wherein the mandrel rod has a length that is greater than a distance between the planetary cross-rolling mill a and the additional rolling mill in the rolling direction.