Joining structure and method for manufacturing same

Abstract

A joint structure is formed by joining a first plate-shaped member made of steel and a second plate-shaped member made of steel that is overlapped on the first plate-shaped member and that is formed in a long shape. A surface of the first plate-shaped member and both edge portions of the second plate-shaped member along a longitudinal direction are joined by a weld metal.

1 . A joint structure formed by joining a first plate-shaped member made of steel and a second plate-shaped member made of steel that is overlapped on the first plate-shaped member and that is formed in a long shape,
 wherein a surface of the first plate-shaped member and both edge portions of the second plate-shaped member along a longitudinal direction are joined by a weld metal.   
     
     
         2 . The joint structure according to  claim 1 , wherein a bent portion is formed on an overlapping surface between the first plate-shaped member and the second plate-shaped member. 
     
     
         3 . The joint structure according to  claim 1 , wherein the first plate-shaped member and the second plate-shaped member are further joined to each other in an overlapping surface between the first plate-shaped member and the second plate-shaped member. 
     
     
         4 . The joint structure according to  claim 1 , wherein at least one of the first plate-shaped member and the second plate-shaped member is a steel material for hot stamping. 
     
     
         5 . The joint structure according to  claim 1 , which is a structural member for an automobile. 
     
     
         6 . A method for manufacturing a joint structure formed by joining a first plate-shaped member made of steel and a second plate-shaped member made of steel that is overlapped on the first plate-shaped member and that is formed in a long shape, the method comprising:
 overlapping the first plate-shaped member and the second plate-shaped member; and   joining each of both edge portions of the second plate-shaped member along a longitudinal direction to the first plate-shaped member by an arc welding or a laser-arc hybrid welding.   
     
     
         7 . The method for manufacturing a joint structure according to  claim 6 , wherein a bending is performed on an overlapping surface between the first plate-shaped member and the second plate-shaped member. 
     
     
         8 . The method for manufacturing a joint structure according to  claim 6 , further comprising joining the first plate-shaped member and the second plate-shaped member to each other in the overlapping surface between the first plate-shaped member and the second plate-shaped member by any welding of a laser welding, a plasma welding, a TIG welding, or a laser-TIG hybrid welding. 
     
     
         9 . The method for manufacturing a joint structure according to  claim 6 , wherein at least one of the first plate-shaped member and the second plate-shaped member is a steel material for hot stamping. 
     
     
         10 . The method for manufacturing a joint structure according to  claim 6 , wherein the joint structure is a structural member for an automobile. 
     
     
         11 . The joint structure according to  claim 2 , wherein the first plate-shaped member and the second plate-shaped member are further joined to each other in an overlapping surface between the first plate-shaped member and the second plate-shaped member. 
     
     
         12 . The joint structure according to  claim 2 , wherein at least one of the first plate-shaped member and the second plate-shaped member is a steel material for hot stamping. 
     
     
         13 . The joint structure according to  claim 2 , which is a structural member for an automobile. 
     
     
         14 . The method for manufacturing a joint structure according to  claim 7 , further comprising joining the first plate-shaped member and the second plate-shaped member to each other in the overlapping surface between the first plate-shaped member and the second plate-shaped member by any welding of a laser welding, a plasma welding, a TIG welding, or a laser-TIG hybrid welding. 
     
     
         15 . The method for manufacturing a joint structure according to  claim 7 , wherein at least one of the first plate-shaped member and the second plate-shaped member is a steel material for hot stamping. 
     
     
         16 . The method for manufacturing a joint structure according to  claim 7 , wherein the joint structure is a structural member for an automobile.