Shoe for swash plate type compressor and method of producing the same

Abstract

A method of producing a shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor, the method comprising: a forming step of forming a steel blank into a shoe product including an end product shoe and a pre size-adjusted shoe; and a nitriding step of effecting a nitriding treatment on said shoe product; and wherein a quenching treatment is not effected after said forming step.

What is claimed is:  
     
         1 . A method of producing a shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor, the method comprising: 
 a forming step of forming a steel blank into a shoe product including an end product shoe and a pre size-adjusted shoe; and    a nitriding step of effecting a nitriding treatment on said shoe product;    and wherein a quenching treatment is not effected after said forming step.    
     
     
         2 . A method according to  claim 1 , wherein any heat-treatment other than said nitriding treatment is not effected after said forming step.  
     
     
         3 . A method according to  claim 1 , wherein a size-adjustment grinding operation is not effected after said nitriding step.  
     
     
         4 . A method according to  claim 3 , wherein said end product shoe is formed in said forming step and said size-adjustment grinding operation is not effected after said forming step.  
     
     
         5 . A method according to  claim 1 , wherein said shoe is a part-spherical crown shoe having a flat portion to be held in sliding contact with said swash plate and a part-spherical portion to be held in sliding contact with said piston, said flat portion being formed to have a slightly convex surface.  
     
     
         6 . A method according to  claim 1 , wherein said steel blank consists of a high carbon chrome bearing steel.  
     
     
         7 . A method according to  claim 1 , wherein said nitriding treatment consists of a gas soft nitriding treatment.  
     
     
         8 . A shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor and produced according to a method as defined in claim  1 .