Method for making wrenches

Abstract

A method for making a wrench includes a step of forging a cylindrical alloy stick in a mold into a basic form including a head and a handle. The head is then treated to machine the two opposite surfaces and at least one hole is drilled in the head and a recess is defined in one of the surfaces of the head to form a prototype. The prototype is then proceeded by step of heat treatment and then put in a mold and plastic material is introduced to cover the head, the handle and the grip portion.

1 . A method for making wrenches, comprising: 
 sep 1: preparing material: preparing raw material which is a cylindrical alloy stick;    step 2: forging: forging the stick in a mold;    step 3: basic form: cutting the stick into a basic form including a head and a handle;    step 4: surface machining: machining two opposite surfaces of the head of the basic form;    step 5: drilling: drilling a hole in the head and making a recess defined in one of the surfaces of the head;    step 6: prototype;    step 7: heat treatment: proceeding heat treatment (annealing) to the prototype;    step 8: plastic part installation: putting the prototype in a mold and plastic material being introduced to cover the head, the handle and the grip portion, and    step 9: obtaining a product.    
   
   
       2 . The method as claimed in  claim 1 , wherein a step of contouring for making the basic form to include the head, the handle and the grip portion is added before the step of heat treatment.  
   
   
       3 . The method as claimed in  claim 1 , wherein a step of surface grinding for grinding surfaces of the prototype is added between steps 7 and 8.  
   
   
       4 . The method as claimed in  claim 1 , wherein a step of final surface treatment for proceeding final surface treatment by way of sand blowing is added between the steps 7 and 8.  
   
   
       5 . The method as claimed in  claim 1 , wherein a step of final surface treatment for proceeding final surface treatment by way of vibrating is added between the steps 7 and 8.  
   
   
       6 . A method for making wrench, comprising: 
 sep 1: preparing material: preparing raw material which is a cylindrical alloy stick;    step 2: forging: forging the stick in a mold;    step 3: basic form: cutting the stick into a basic form including a head and a handle;    step 4: surface machining: machining two opposite surfaces of the head of the basic form;    step 5: drilling: drilling a hole in the head and making a recess defined in one of the surfaces of the head;    step 6: prototype;    step 7: heat treatment: proceeding heat treatment (annealing) to the prototype;    step 8: coating: putting the prototype in a container filled with liquid plastic material which is coated to the head, the handle and the grip portion, and    step 9: obtaining a product.    
   
   
       7 . The method as claimed in  claim 6 , wherein a step of contouring for making the basic form to include the head, the handle and the grip portion is added before the step of heat treatment.  
   
   
       8 . The method as claimed in  claim 6 , wherein a step of surface grinding for grinding surfaces of the prototype is added between steps 7 and 8.  
   
   
       9 . The method as claimed in  claim 6 , wherein a step of final surface treatment for proceeding final surface treatment by way of sand blowing is added between the steps 7 and 8.  
   
   
       10 . The method as claimed in  claim 6 , wherein a step of final surface treatment for proceeding final surface treatment by way of vibrating is added between the steps 7 and 8.