Golf club head manufacturing method

Abstract

A method for manufacturing golf club head includes: preparing a head blank for an iron type golf club head, the head blank having a recess serving as a measure of polishing or grinding at least in a portion of a sole part of the head blank; and polishing or grinding the head blank according to the recess.

What is claimed is: 
     
         1 . A method for manufacturing golf club head comprising:
 preparing a head blank for an iron type golf club head, the head blank having a recess serving as a measure of polishing or grinding at least in a portion of a sole part of the head blank; and   polishing or grinding the head blank according to the recess.   
     
     
         2 . The method according to  claim 1 , wherein
 the recess is a groove.   
     
     
         3 . The method according to  claim 2 , wherein
 a width of the groove is in the range of 0.1 mm to 1 mm.   
     
     
         4 . The method according to  claim 1 , wherein
 a depth of the recess is in the range of 0.1 mm to 1 mm.   
     
     
         5 . The method according to  claim 1 , wherein
 the recess is formed on a back surface side of the sole part.   
     
     
         6 . The method according to  claim 1 , wherein
 the polishing or the grinding is ended when a depth of the recess is reduced down to a specified depth.   
     
     
         7 . The method according to  claim 1 , wherein
 the recess has a shape having a width reducing toward its deeper side.   
     
     
         8 . The method according to  claim 1 , wherein:
 the recess includes a first part and a second part connected together in a depth direction;   the second part is situated deeper than the first part and is smaller in width than the first part; and   the polishing or the grinding is ended when an outer surface of the head blank reaches a step surface defined by the first part and the second part.   
     
     
         9 . The method according to  claim 1 , wherein:
 the recess includes a first part and a second part connected together in a depth direction;   the second part is situated deeper than the first part and is smaller in width than the first part; and   the polishing or the grinding is ended when an outer surface of the head blank reaches the second part.   
     
     
         10 . The method according to  claim 1 , wherein
 at least two side surfaces of the head blank are subjected to the polishing or the grinding.   
     
     
         11 . A method for manufacturing golf club head comprising:
 preparing a head blank for an iron type golf club head, the head blank having a first recess and a second recess, having a larger depth than the first recess, serving as a measure of polishing or grinding at least in a portion of a sole part of the head blank; and   polishing or grinding the head blank according to the recess, wherein   the polishing or the grinding is ended when the first recess is eliminated by the polishing or the grinding.   
     
     
         12 . The method according to  claim 11 , wherein
 at least two side surfaces of the head blank are subjected to the polishing or the grinding.