Reaction force expanding and clamping device

Abstract

A method of clamping and locking a roll for a steel mill on a driving pinion comprising applying a side thrust force against a roller to clamp it against a shoulder on the pinion whilst applying the reaction force produced by the side thrust force to cause a plug located in a cavity in the pinion beneath the roll to move sideways. The plug is provided with threads which when the plug is moved sideways produces a wedging action which expands the mounting surface on which the roll is mounted to lock the roll on the driving pinion.

1 . An assembly for mounting and clamping a roll on a pinion comprising: 
 a pinion having a shoulder provided thereon adjacent a roll mounting surface on said pinion;    said pinion being provided with a hollow cylindraceous cavity immediately below said roll mounting surface, said cylindraceous cavity being threaded with a shallow buttress type thread of a predetermined profile;    plug means being threaded into said cavity a predetermined distance, said plug means being provided with matching type buttress threads corresponding to said threads provided in said cavity;    force means for producing a first force in a transmission member to force said roll against said shoulder;    said force means also producing a second force which is equal and opposite to said first force;    said second force being applied to said plug means to cause axial movement of said plug means in said cavity    said plug being moved axially in a direction opposite to said first force a sufficient distance to expand said roll mounting surface.    
   
   
       2 . A method of clamping and locking a roll on a pinion comprising: 
 providing a pinion with a surface suitable for mounting a roll thereon; providing said pinion with a shoulder having an annular surface thereon for mounting a roll against said shoulder on said pinion;    providing a roll for mounting on said pinion;    providing a cylindraceous cavity beneath said mounting surface a predetermined distance, providing a shallow sloped buttress thread of a predetermined configuration on the interior surface of said cavity;    providing a threaded plug to engage the shallow buttress threads of said cavity;    a first force producing means engaging said roll to force said roll against said shoulder;    a reaction force produced in said force producing means applied to said plug to cause lateral motion of said plug in said cavity to ramp the buttress threads so as to simultaneously expand said cavity as said force is being applied to said roll.    
   
   
       3 . An assembly for mounting and clamping a roll on the end of a pinion comprising: 
 a pinion having a roller mounting surface provided thereon and wherein said pinion is provided with a roll engaging shoulder adjacent said roll mounting surface,    said pinion being provided with a hollow cylindraceous cavity located immediately below said roll mounting surface,    said cylindraceous cavity being threaded with a shallow buttress thread of a predetermined profile,    plug means being provided with matching buttress threads threaded into said cavity a predetermined distance,    lock mans for said plug means to prevent further rotation of said plug means once said predetermined distance is reached,    first force means being produced in said assembly for forcing said roll against said shoulder, and reaction force being produced by said first force means for moving said plug means laterally to cause ramping of said buttress threads,    to cause said cavity to expand beneath said roll.    
   
   
       4 . An assembly as claimed in  claim 1  wherein said lock means comprises at least one bolt passing freely through said plug means and secured to said cavity.  
   
   
       5 . An assembly as claimed in  claim 2  wherein said first force means comprises a series of compression bolts threaded into a collar which engage said roll, 
 said collar being attached to said plug means so that when said compression bolts are torqued, a reaction force is produced in said plug means moving said plug means laterally and causing ramping of said threads.    
   
   
       6 . An assembly as claimed in  claim 2  wherein said first force means comprises a fluid pressure force forcing said roll against said shoulder, and a reaction fluid force simultaneously producing an equal and opposite force on said plug means causing lateral movement of said plug to ramp said threads and expand said cavity beneath said roll.