Keyless tooling system

Abstract

A keyless tooling system for the production of continuous seam-welded tubes is disclosed wherein the tube forming rolls are selectively held in fixed position on supporting spindles by an expandable tapered bushing. The bushing may be caused to move to permit contraction in annular dimension facilitating the removal of the associated forming roll during a mill changeover.

What is claimed is:  
     
         1 . A keyless tooling system for the production of continuous seam-welded tubes comprising: 
 a tapered spindle having a tapered outer surface journaled for rotation between front and rear stands of the tube mill;    an expandable tapered bushing juxtaposed on the tapered outer surface of said spindle;    a forming roll having a hollow central bore carried by an outer surface of said bushing;    first driver for moving said bushing in a first direction to cause expansion of said bushing between the tapered surface of said spindle and hollow central bore of said forming roll; and    second driver for moving said bushing in a second direction to cause contraction of said bushing between the tapered surface of said spindle and hollow central bore of said forming roll.    
     
     
         2 . The invention defined in  claim 1  wherein said first driver and said second driver actuated by pressure fluid.  
     
     
         3 . The invention defined in  claim 1  including a source of fluid pressure, first conduit means coupling said source to said first driver and second conduit means coupling said source to said second driver.  
     
     
         4 . The invention defined in  claim 1  wherein said expandable tapered bushing is generally cylindrical and is provided with a plurality of a substantially parallel spaced apart slots.  
     
     
         5 . A keyless tooling system for the production of continuous seam-welded tubes comprising: 
 a tapered spindle having a tapered outer surface journaled for rotation between front and rear stands of the tube mill;    an expandable tapered bushing juxtaposed on the tapered outer surface of said spindle;    a forming roll having a hollow central bore carried by an outer surface of said bushing;    first driver for moving said bushing in a first direction to cause said bushing to secure said forming roll to said spindle; and    second driver for moving said bushing in a second direction to cause said bushing to release said forming roll from said spindle.    
     
     
         6 . The invention defined in  claim 5  wherein said first driver and said second driver actuated by pressure fluid.  
     
     
         7 . The invention defined in  claim 5  including a source of fluid pressure, first conduit means coupling said source to said first driver and second conduit means coupling said source to said second driver.  
     
     
         8 . The invention defined in  claim 5  wherein said expandable tapered bushing is generally cylindrical and is provided with a plurality of a substantially parallel spaced apart slots.  
     
     
         9 . A keyless tooling system for maintaining a roll on a tapered supporting spindle comprising: 
 an expandable tapered bushing juxtaposed on the tapered spindle;    a roll having a hollow central bore carried by said bushing; and    means for moving said bushing in a first direction to cause expansion of said bushing and in a second direction to cause contraction of said bushing.