Golf head and welding method thereof

Abstract

The present invention relates to a golf head and a welding method thereof. In the welding method of the invention, a metal plate is disposed in an opening of a metal body, wherein the shape of the metal plate matches that of the opening. Subsequently, a first electrode and a second electrode contact a back surface of the metal body and a top surface of the metal plate respectively, wherein the shapes of the first electrode and the second electrode match those of the back surface and the top surface respectively. Finally, the first electrode and the second electrode output a current so as to weld the metal body and the metal plate by a resistance welding process. By utilizing the welding method, the welding speed can be significantly increased so as to increase the yield, and the welded joint can be stronger. Furthermore, the welded golf head has a high flatness so that the following manufacturing cost can be decreased.

1 . A golf head, comprising:
 a metal body, having an opening with a first welding surface; and   a metal plate, wherein the shape of the metal plate matches that of the opening, the metal plate has a second welding surface opposite to the first welding surface, at least one of the first welding surface and the second welding surface has at least one bump, and the first welding surface and the second welding surface are welded by a resistance welding method.   
   
   
       2 . The golf head according to  claim 1 , further comprising a solder coated on at least one of the first welding surface and the second welding surface. 
   
   
       3 . The golf head according to  claim 2 , wherein the solder is selected from a group consisting of nickel, silver, copper, aluminum, or any alloy combination thereof. 
   
   
       4 . The gold head according to  claim 1 , wherein the first welding surface has at least one first bump. 
   
   
       5 . The gold head according to  claim 1 , wherein the second welding surface has at least one second bump. 
   
   
       6 . The gold head according to  claim 1 , wherein the first welding surface has at least one first bump, and the second welding surface has at least one second bump. 
   
   
       7 . A golf head, comprising:
 a metal body, having an opening with a first bevel; and   a metal plate, wherein the shape of the metal plate matches that of the opening, the metal plate has a second bevel at the periphery, the second bevel is disposed opposite to the first bevel, and the first bevel and the second bevel are welded by a resistance welding method.   
   
   
       8 . The gold head according to  claim 7 , wherein the first bevel has at least one first bump. 
   
   
       9 . The gold head according to  claim 7 , wherein the second bevel has at least one second bump. 
   
   
       10 . The gold head according to  claim 7 , wherein the first bevel has at least one first bump, and the second bevel has at least one second bump. 
   
   
       11 . The gold head according to  claim 7 , further comprising a solder coated on at least one of the first bevel and the second bevel. 
   
   
       12 . The gold head according to  claim 11 , wherein the solder is selected from a group consisting of nickel, silver, copper, aluminum, or any alloy combination thereof. 
   
   
       13 . A resistance welding method of a golf head, comprising:
 (a) providing a metal body, having an opening and a back surface, wherein the opening has a first welding surface;   (b) providing a metal plate, wherein the shape of the metal plate matches that of the opening, the metal plate has a second welding surface and a top surface, and the second welding surface is opposite to the first welding surface;   (c) contacting the back surface of the metal body and the top surface of the metal plate with a first electrode and a second electrode respectively, wherein the shapes of the first electrode and the second electrode match those of the back surface of the metal body and the top surface of the metal plate respectively; and   (d) conducting a current to the first electrode and the second electrode, to weld the first welding surface of the metal body and the second welding surface of the metal plate by the resistance welding method.   
   
   
       14 . The welding method according to  claim 13 , wherein the step (a) further comprises a step of forming at least one first bump on the first welding surface. 
   
   
       15 . The welding method according to  claim 13 , wherein the step (b) further comprises a step of forming at least one second bump on the second welding surface. 
   
   
       16 . The welding method according to  claim 13 , further comprising a step of forming at least one first bump on the first welding surface and forming at least one second bump on the second welding surface before step (c). 
   
   
       17 . The welding method according to  claim 13 , further comprising a step of coating a solder on at least one of the first welding surface and the second welding surface before step (c). 
   
   
       18 . A resistance welding method of two metal elements, comprising:
 (a) providing a first metal element, having a first welding surface and a back surface;   (b) providing a second metal element, having a second welding surface and a top surface, wherein the second welding surface is opposite to the first welding surface;   (c) contacting the back surface of the first metal element and the top surface of the second metal element with a first electrode and a second electrode respectively, wherein the shapes of the first electrode and the second electrode match those of the back surface of the first metal element and the top surface of the second metal element respectively; and   (d) conducting a current to the first electrode and the second electrode, to weld the first welding surface of the first metal element and the second welding surface of the second metal element by the resistance welding method.   
   
   
       19 . The welding method according to  claim 18 , wherein the step (a) further comprises a step of forming at least one first bump on the first welding surface. 
   
   
       20 . The welding method according to  claim 18 , wherein the step (b) further comprises a step of forming at least one second bump on the second welding surface. 
   
   
       21 . The welding method according to  claim 18 , further comprising a step of forming at least one first bump on the first welding surface and forming at least one second bump on the second welding surface before step (c). 
   
   
       22 . The welding method according to  claim 18 , further comprising a step of coating a solder on at least one of the first welding surface and the second welding surface before step (c).