Method of producing a component by welding

Abstract

An embodiment provides a method of producing a component. A rigidity-reinforcing part is formed on a first part, a second part, or a third part adjacent to a point where a preceding weld and a following weld intersect each other. The first part and the second part are coupled to each other by performing the preceding weld in a state of overlapping and a part of a first junction part and a second junction part are pressurized. After performing the preceding weld, the first part, the second part, and the third part are coupled to each other by pressurizing and performing a following weld while overlapping a part of a third junction part with an opposite part of the first junction part and overlapping a remaining part of the third junction part with a cross junction part.

What is claimed is: 
     
         1 . A method of producing a component, the method comprising:
 forming a rigidity-reinforcing part on a first part, a second part, or a third part adjacent to a point where a preceding weld and a following weld intersect each other;   coupling the first part and the second part to each other by performing the preceding weld in a state of overlapping and pressurizing a part of a first junction part and a second junction part; and   after performing the preceding weld, coupling the first part, the second part, and the third part to each other by pressurizing and performing a following weld while overlapping a part of a third junction part with an opposite part of the first junction part and overlapping a remaining part of the third junction part with a cross junction part.   
     
     
         2 . The method of  claim 1 , wherein performing the preceding weld comprises laser welding. 
     
     
         3 . The method of  claim 1 , wherein performing the following weld comprises laser welding. 
     
     
         4 . The method of  claim 1 , wherein performing the preceding weld comprises laser welding and wherein performing the following weld comprises laser welding. 
     
     
         5 . The method of  claim 1 , wherein the rigidity-reinforcing part is in a groove shape recessed to a certain depth. 
     
     
         6 . The method of  claim 5 , further comprising filling a recess of the rigidity-reinforcing part with a sealer. 
     
     
         7 . The method of  claim 6 , wherein the sealer is connected to a pinhole formed at the point where the preceding weld and the following weld intersect each other. 
     
     
         8 . The method of  claim 7 , wherein the pinhole is filled with the sealer. 
     
     
         9 . The method of  claim 1 , wherein the rigidity-reinforcing part is formed at a position between the second junction part and the cross junction part, the position being where the second junction part and the cross junction part meet each other in the second part. 
     
     
         10 . The method of  claim 1 , wherein the first part, the second part, and the third part are each made of the same material. 
     
     
         11 . The method of  claim 1 , wherein one of the first part, the second part, or the third part is made of a different metal than others of the first part, the second part, and the third part. 
     
     
         12 . A method of making a tailgate, the method comprising:
 providing a first part that comprises an upper panel of an outer panel assembly;   providing a second part that comprises a lower panel of the outer panel assembly;   providing a third part that comprises an extension panel;   forming a rigidity-reinforcing part on the first part, the second part, or the third part adjacent to a point where a preceding weld and a following weld intersect each other;   coupling the first part and the second part to each other by performing the preceding weld in a state of overlapping and pressurizing a part of a first junction part and a second junction part; and   after performing the preceding weld, coupling the first part, the second part, and the third part to each other by pressurizing and performing a following weld while overlapping a part of a third junction part with an opposite part of the first junction part and overlapping a remaining part of the third junction part with a cross junction part.   
     
     
         13 . The method of  claim 12 , wherein performing the preceding weld comprises laser welding and wherein performing the following weld comprises laser welding. 
     
     
         14 . The method of  claim 12 , wherein the rigidity-reinforcing part is in a groove shape recessed to a certain depth, further comprising filling a recess of the rigidity-reinforcing part with a sealer. 
     
     
         15 . The method of  claim 14 , wherein the sealer is connected to a pinhole formed at the point where the preceding weld and the following weld intersect each other, wherein the pinhole is filled with the sealer. 
     
     
         16 . The method of  claim 12 , wherein the first part, the second part, and the third part are each made of the same material. 
     
     
         17 . The method of  claim 12 , wherein one of the first part, the second part, or the third part is made of a different metal than others of the first part, the second part, and the third part.