Method of finishing a metal preform

Abstract

The invention relates to a method of finishing a metal preform. The preform is green machined in a first method step. Next, the quality surfaces, which, on the finished component part are to meet stringent quality requirements, are roller burnished. Finally, the preform is hardened.

1 . A method of finishing a metal preform, wherein by the method steps of: 
 green machining the preform,    roller burnishing quality surfaces which, on the finished component part, are to meet stringent quality requirements, and    hardening the preform.    
     
     
         2 . The method as set forth in  claim 1 , wherein the preform is formed from a warm-forged metal.  
     
     
         3 . The method as set forth in  claim 2 , wherein the quality surfaces defined by surfaces carrying the roller bearings.  
     
     
         4 . The method as set forth in  claim 1  wherein the quality of surfaces define gasket seats.  
     
     
         5 . The method as set forth in  claim 1 , wherein the quality surfaces define ball nubs.  
     
     
         6 . The method as set forth in  claim 1 , wherein the preform is a joint part of a constant velocity joint.  
     
     
         7 . The method as set forth in  claim 6 , wherein the preform is a three-legged spider.  
     
     
         8 . The method as set forth in  claim 7 , wherein the quality surfaces define surfaces carrying the roller bearings that are disposed on pivots of the three-legged spider.  
     
     
         9 . The method as set forth in  claim 1 , wherein the quality surfaces are formed by surfaces carrying the roller bearings.  
     
     
         10 . The method as set forth in  claim 2 , wherein the quality of surfaces define gasket seats.  
     
     
         11 . The method as set forth in  claim 2 , wherein the quality surfaces define ball hubs.  
     
     
         12 . The method as set forth in  claim 2 , wherein the preform is a joint part of a constant velocity joint.