Fabricating method for fabricating metallic member

Abstract

A method for fabricating a metallic member includes providing a pre-forging mould. The pre-forging mould comprises an upper mould and a lower mould. The lower mould defines a pre-forging chamber, and a die cavity defined in a bottom surface of the pre-forging chamber. A metallic stock is placed above the die cavity, and the upper mould is moved toward the lower mould to forge the metallic stock, thereby forming a pre-formed body comprising a forging portion and a pre-forged base; annealing the pre-formed body; providing a forging mould to forge the pre-formed body, thereby obtaining a forged-body with a forged base thinner than that of the pre-forged base. Then the forged-body is milled to a desired size, and sandblasted, thereby obtaining the metallic member.

What is claimed is: 
     
         1 . A fabricating method for a metallic member, comprising:
 providing a pre-forging mould, the pre-forging mould comprising an upper mould and a lower mould, the lower mould defining a pre-forging chamber therein, and a die cavity being defined on a bottom surface of the pre-forging chamber;   placing a metallic stock above the die cavity, moving the upper mould toward the lower mould to forge the metallic stock, thereby forming a pre-forming body comprising a forging portion in the die cavity and a pre-forged base located between the bottom surface of the pre-forging chamber and the upper mould;   annealing the pre-forming body;   providing a forging mould to forge the pre-forming body, the forging mould comprising a movable mould and a stationary mould, the stationary mould defining a forging chamber having a shape and sizes being substantially the same as that of the die cavity of the lower mould, placing the pre-forming body on the stationary mould with the forging portion received in the forging chamber, moving the movable mould toward the stationary mould, thereby obtaining a forged-body having a thickness being thinner than that of the pre-forged base; and   milling the forged-body to a desired size.   
     
     
         2 . The fabricating method of  claim 1 , wherein the die cavity has a plurality of stepped sides narrowing towards the bottom thereof. 
     
     
         3 . The fabricating method of  claim 1 , wherein when the upper mould moves toward the lower mould, a side portion of the metallic stock is partly blocked by a side surface of the pre-forging chamber, a portion of the metallic stock flows into the die cavity, thereby forming the forging portion in the die cavity. 
     
     
         4 . The fabricating method of  claim 1 , wherein the metallic stock is made of stainless steel or aluminum alloy. 
     
     
         5 . The fabricating method of  claim 3 , wherein in the step of forming the pre-forming body, a plurality of pine-tree crystals, air cavities and loosenings of the metallic stock deform toward the side surface of the pre-forging chamber, thereby forming a plurality of metallic flow lines in the pre-forming body along a deforming direction thereof, and after annealing the pre-forming body, the plurality of metallic flow lines are eliminated. 
     
     
         6 . A fabricating method for a metallic member, comprising:
 providing a pre-forging mould, the pre-forging mould comprising an upper mould and a lower mould, the lower mould defining a pre-forging chamber, and a die cavity is defined on a bottom surface of the pre-forging chamber;   placing a metallic stock above the die cavity and partly received in the pre-forging chamber, moving the upper mould toward the lower mould and forging the metallic stock, thereby forming a pre-forming body comprising a forging portion in the die cavity and a pre-forged base between the bottom surface of the pre-forging chamber and the upper mould, wherein a plurality of pine-tree crystals, air-holes cavities and loosenings of the metallic stock deform toward a side surface of the pre-forging chamber, thereby forming a plurality of the metallic flow lines in the pre-forming body along a deforming direction thereof;   annealing the pre-forming body to eliminate the plurality of metallic flow lines;   providing a forging mould to forge the pre-forged base of the pre-forming body, thereby obtaining a forged-body with a forged base being thinner in thickness than that of the pre-forged base;   milling the forged-body to a desired size; and   applying a sand blasting process to the forged-body, thereby obtaining the metallic member.   
     
     
         7 . The fabricating method of  claim 6 , wherein the forging mould comprises a movable mould and a stationary mould, the stationary mould defines a forging chamber thereon therein having a shape and sizes being substantially the same as that of the die cavity of the lower mould, when forging the pre-forged base of the pre-forming body, the pre-forming body is disposed on the stationary mould with the forging portion received in the forging chamber, the movable mould moves toward the stationary mould, thereby obtaining the forged-body with the forged base. 
     
     
         8 . The fabricating method of  claim 6 , wherein the die cavity has stepped sides narrowing towards the bottom thereof. 
     
     
         9 . The fabricating method of  claim 6 , wherein when the upper mould moves toward the lower mould, a side portion of the metallic stock is partly blocked by the side surface of the pre-forging chamber, a portion of the metallic stock flows into the die cavity, thereby forming the forging portion in the die cavity. 
     
     
         10 . The fabricating method of  claim 6 , wherein the metallic stock is made of stainless steel or aluminum alloy. 
     
     
         11 . A fabricating method for a metallic member, comprising:
 providing a pre-forging mould, the pre-forging mould comprising an upper mould and a lower mould, the lower mould defining a pre-forging chamber, and a die cavity is defined on a bottom surface of the pre-forging chamber;   placing a metallic stock above the die cavity and partly received in the pre-forging chamber, moving the upper mould toward the lower mould and forging the metallic stock, thereby forming a pre-forming body comprising a forging portion in the die cavity and a pre-forged base between the bottom surface of the pre-forging chamber and the upper mould;   annealing the pre-forming body;   providing a forging mould to forge the pre-forged base of the pre-forming body, thereby obtaining a forged-body with a forged base having a thickness thinner than the pre-forged base; and   milling the forged-body to a desired size.   
     
     
         12 . The fabricating method of  claim 11 , further comprising a step after milling the forged-body, of applying a sand blasting process to the forged-body, thereby obtaining a metallic member. 
     
     
         13 . The fabricating method of  claim 11 , wherein the forging mould comprises a movable mould and a stationary mould, the stationary mould defines a forging chamber therein having a shape and size substantially the same as the die cavity of the lower mould, when forging the pre-forming body, the pre-forming body is disposed on the stationary mould with the forging portion received in the forging chamber, moving the movable mould toward the pre-forged base, thereby obtaining the forged-body with the forged base. 
     
     
         14 . The fabricating method of  claim 11 , wherein the die cavity has stepped sides narrowing towards the bottom thereof. 
     
     
         15 . The fabricating method of  claim 11 , wherein when the upper mould moves toward the lower mould, a side portion of the metallic stock is partly blocked by a side surface of the pre-forging chamber, a portion of the metallic stock flows into the die cavity, thereby forming the forging portion in the die cavity. 
     
     
         16 . The fabricating method of  claim 11 , wherein the metallic stock is made of stainless steel or aluminum alloy.