Rolling train for the rolling of wire and light steel sections

Abstract

A rolling line for wire and light sections in which the horizonal and vertical rolls are provided in a common stand, one upstream of the other and the axis planes are spaced in the rolling direction, the spacing is adjustable and the spacing can be set for a particular rolling operation. The grooves of the upstream pair of rolls can deform the original section of the workpiece of an intermediate shape which is restored by the downstream pair of rolls with a reduced dimension.

We claim:  
     
         1 . A rolling train for wire, rod and light sections and comprising: 
 a rolling path along which a metallic workpiece is rolled to a final shape and dimensions from an initial shape and dimensions;    a prerolling stretch at an upstream location along said path and including at least one prerolling stage having at least one succession of horizontal and vertical roll pairs alternating with one another;    an intermediate rolling stretch downstream of said prerolling stretch along said path and including at least one intermediate stage having at least one succession horizontal and vertical roll pairs alternating with one another; and    a final rolling stretch for final dimension and shape rolling of said workpiece downstream of said intermediate rolling stretch, 
 at least one of said successions of two roll stands comprising: 
 a common roll stand receiving both a horizontal roll pair and a vertical roll pair,  
 a drive connected to horizontal rolls of the horizontal roll pair of said common roll stand, and  
 a mechanism for controlling a spacing between vertical planes of axes of said horizontal rolls and axes of vertical rolls of the common roll stand.  
 
   
     
     
         2 . The rolling train defined in  claim 1 , further comprising an auxiliary drive capable of being switched on and off connected to drive said vertical rolls of the common roll stand.  
     
     
         3 . The rolling train defined in  claim 1  wherein said auxiliary drive is coupled to the drive of said horizontal rolls.  
     
     
         4 . The rolling train defined in  claim 1  wherein said common roll stand is in said intermediate stretch.  
     
     
         5 . The rolling train defined in  claim 1  wherein said horizontal rolling stand precedes said vertical rolling stand along said path in said at least one of said successions.  
     
     
         6 . The rolling train defined in  claim 1  wherein said vertical roll pair of said stand engages said workpiece as it emerges under pressure from the caliber of a pair of said stand.  
     
     
         7 . A method of operating a rolling train for wire, rod and light sections, comprising the steps of: 
 passing a metallic workpiece along a rolling path in which the metallic workpiece is rolled to a final shape and dimensions from an initial shape and dimensions;    rolling said workpiece in a prerolling stretch at an upstream location along said path and including at least one prerolling stage having at least one succession of a horizontal roll pair and a vertical roll pair alternating with one another;    thereafter rolling said workpiece in an intermediate rolling stretch downstream of said prerolling stretch along said path and including at least one intermediate stage having at least one succession of a horizontal roll pair and a vertical roll pair alternating with one another; and    finally rolling said workpiece in a final rolling stretch for final dimension and shape rolling of said workpiece downstream of said intermediate rolling stretch, 
 at least one of said successions of two roll stands comprising: 
 a common drive stand for both a horizontal roll pair and a vertical roll pair,  
 a drive connected to horizontal rolls of the horizontal roll pair of said stand, and  
 a mechanism for controlling a spacing between vertical planes of axes of said horizontal rolls and axes of vertical rolls of said stand, 
 the workpiece exiting grooves of a first of the roller pairs of the stand being engaged directly and while still under the pressure of the first of the roller pairs in grooves of a second of said two roller pairs of the stand.  
 
 
   
     
     
         8 . The method defined in  claim 7  wherein the first of said two roller pairs is a horizontal pair.