Manufacturing method of a weight parts integratedly connected with a forged golf club head

Abstract

A method of forming a weight part integratedly connected with a forged golf club head includes steps of a club head forming step, at least one engaging recess forming step, at least one weight part engaging step, and a step of integratedly connecting the at least one weight part with the club head by forging. A crude rod is provided into a raw forging die and formed to a club head by a forging process. At least one engaging recess is formed in a sole portion or a back portion of the club head by a machining method. At least one weight part is engaged into the at least one engaging recess of the club head. The club head with the at least one weight part is pressed by a forging process to make the material of the club head cover the at least one weight part completely without gaps.

What is claimed is: 
     
         1 . A manufacturing method comprising steps of:
 a club head forming step, comprising:
 providing a crude rod into a raw forging die, and forming the crude rod into a club head by a forging process; 
   at least one engaging recess forming step, comprising:
 forming at least one engaging recess in a sole portion or a back portion of the club head by a machining method; 
   at least one weight part engaging step, comprising:
 engaging at least one weight part into the at least one engaging recess of the club head; and 
   a step of integratedly connecting the at least one weight part with the club head by forging, comprising:
 pre-heating the club head with the at least one weight part and placing the heated club head into a pre-heated fine forging die, and pressing the club head by a forging process to make the material of the club head flow and the at least one weight part completely covered by the material inside the club head. 
   
     
     
         2 . The manufacturing method as claimed in  claim 1 , wherein the club head with the at least one weight part is heated to a pre-heating temperature of 700 to 1150 degrees Celsius. 
     
     
         3 . The manufacturing method as claimed in  claim 2 , wherein the fine forging die is heated to a pre-heating temperature of 200 to 300 degrees Celsius. 
     
     
         4 . The manufacturing method as claimed in  claim 3 , wherein each one of the at least one weight part has a channel formed in a surface of the weight part. 
     
     
         5 . The manufacturing method as claimed in  claim 1 , wherein the at least one engaging recess is formed in the sole portion of the club head by milling. 
     
     
         6 . The manufacturing method as claimed in  claim 2 , wherein the at least one engaging recess is formed in the sole portion of the club head by milling. 
     
     
         7 . The manufacturing method as claimed in  claim 3 , wherein the at least one engaging recess is formed in the sole portion of the club head by milling. 
     
     
         8 . The manufacturing method as claimed in  claim 4 , wherein the at least one engaging recess is formed in the sole portion of the club head by milling. 
     
     
         9 . The manufacturing method as claimed in  claim 1 , wherein the at least one engaging recess is formed in the back portion of the club head by milling. 
     
     
         10 . The manufacturing method as claimed in  claim 2 , wherein the at least one engaging recess is formed in the back portion of the club head by milling. 
     
     
         11 . The manufacturing method as claimed in  claim 3 , wherein the at least one engaging recess is formed in the back portion of the club head by milling. 
     
     
         12 . The manufacturing method as claimed in  claim 4 , wherein the at least one engaging recess is formed in the back portion of the club head by milling. 
     
     
         14 . The manufacturing method as claimed in  claim 3 , wherein the forging process of forming the club head is a single forging step. 
     
     
         15 . The manufacturing method as claimed in  claim 3 , wherein the forging process of forming the club head is a multi-forging step. 
     
     
         16 . The manufacturing method as claimed in  claim 14 , wherein the at least one weight is made of WNi(tungsten nickel) alloy. 
     
     
         17 . The manufacturing method as claimed in  claim 15 , wherein the at least one weight is made of WNi(tungsten nickel) alloy.