Method and apparatus to produce a precisely textured surface on a workpiece

Abstract

This invention relates to a method and apparatus to create a pre-established textured surface on a workpiece. The pre-established textured surface includes an average roughness and a non-directional lay pattern being formed to a controlled width.

What is claimed is:  
     
         1 . A workpiece being adapted for engagement with an elastomeric toric on a duo-cone seal, said workpiece comprising: 
 a centerline;    a surface having a pre-established surface texture and defined concentrically about said centerline;    said surface defining an average roughness and a lay pattern which is non-directional; and    a controlled width being defined by a first border and second border spaced at a distance away from said first border.    
     
     
         2 . The workpiece of  claim 1  having said average roughness between 3.25 and 6.75 micro-meter (126 and 263 micro-inch).  
     
     
         3 . A texturing tool for precisely deforming the surface of a workpiece, said tool comprising: 
 a tool steel member;    a central axis extending through said tool steel member;    a bore centered about said central axis and having a predetermined diameter;    a peripheral surface extending about said tool steel member; and    a coating being applied to said peripheral surface wherein said coating is equal or greater in roughness to a pre-established surface texture desired on said workpiece.    
     
     
         4 . The texturing tool of  claim 3 , further having said coating that is 20-40 percent greater in roughness than said pre-established surface texture desired on said workpiece.  
     
     
         5 . The texturing tool of  claim 3 , including said coating being manufactured using a plasma sprayed carbide process.  
     
     
         6 . The texturing tool of  claim 3 , including said tool steel member having said peripheral surface including a texture mirroring said pre-established surface texture.  
     
     
         7 . A method for producing a precise textured surface, said surface having an average roughness and a lay pattern which is non-directional, said method for producing said precise textured surface comprising the steps of: 
 securing said workpiece in a fixture;    positioning a texturing tool relative to said surface to be textured;    interfacing said tool with said surface;    rotating one of said tool and said fixture about an entire profile of said surface; and    forming a controlled width of said textured surface.    
     
     
         8 . The method of  claim 7 , further including the step of repeatably interfacing said tool with said surface, whereby said textured surface increases in uniformity.