Automobile frame capable of friction stir welding of closed section structure

摘要

The present invention relates to an automobile frame capable of friction stir welding of a closed section structure, and more particular, an automobile frame capable of friction stir welding of a closed section structure, comprising: a pair of side members spaced apart from each other; a front member having one end connected to one of the side members and the other end connected to the other, both ends including a closed cross section; a rear member having one end connected to one of the side members and the other end connected to the other, and disposed to be spaced apart from the front member; and a support member installed on the inside of each of both ends of the front member. The support member supports a welding portion between the front member and the side member when the front member and the side member are welded in a friction stir welding manner. Even when the welding portion between the front member and the side member includes a closed cross section, the friction stir welding can be performed. When the front member and the side member are friction stir welded, a separate jig or back plate is not required. Durability and strength of the welding portion between the front member and the side member can be reinforced.