Method for making a wrench

Abstract

A method for manufacturing a wrench having a hollow handle includes preparing a head having an engaging portion, necking an end of a metal tubular member, closing another end of the metal tubular member, and fusing the end of the metal tubular member and the head together, forming a wrench having a hollow handle. The step of fusing may be performed before the step of closing. The method may further include a step of proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle. Next, the hollow handle may be heat processed to improve the strength and hardness of the tubular member. Then, the surface of the tubular member may be finished.

1 . A method for manufacturing a wrench having a hollow handle, comprising: 
 preparing a head having an engaging portion;    necking an end of a metal tubular member;    closing another end of the metal tubular member; and    fusing the end of the metal tubular member and the head together, forming a wrench having a hollow handle.    
   
   
       2 . The method as claimed in  claim 1 , wherein the step of fusing is performed before the step of closing.  
   
   
       3 . The method as claimed in  claim 1 , wherein the step of necking is performed before the step of closing and the step of fusing.  
   
   
       4 . The method as claimed in  claim 1 , further including a step of proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       5 . The method as claimed in  claim 4 , further including a step of heat processing the hollow handle after the step proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       6 . The method as claimed in  claim 5 , further including a step of surface finishing the hollow handle after the step of heat processing.  
   
   
       7 . The method as claimed in  claim 6 , wherein the step of surface finishing includes at least one of oscillation, sanding, blackening, and electro deposition.  
   
   
       8 . The method as claimed in  claim 2 , further including a step of proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       9 . The method as claimed in  claim 8 , further including a step of heat processing the hollow handle after the step proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       10 . The method as claimed in  claim 9 , further including a step of surface finishing the hollow handle after the step of heat processing.  
   
   
       11 . The method as claimed in  claim 10 , wherein the step of surface finishing includes at least one of oscillation, sanding, blackening, and electro deposition.  
   
   
       12 . The method as claimed in  claim 3 , further including a step of proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       13 . The method as claimed in  claim 12 , further including a step of heat processing the hollow handle after the step proceeding at least one of grinding, patching, and polishing an outer periphery of the hollow handle.  
   
   
       14 . The method as claimed in  claim 13 , further including a step of surface finishing the hollow handle after the step of heat processing.  
   
   
       15 . The method as claimed in  claim 14 , wherein the step of surface finishing includes at least one of oscillation, sanding, blackening, and electro deposition.