WELDED STRUCTURAL MEMBER PRODUCTION METHOD AND WELDED STRUCTURAL MEMBER

摘要

Disclosed is a welded structural member production method comprises: a first preparation step of preparing a cross-sectionally hat-shaped first metal workpiece which has a first base wall, a pair of first standing walls and a pair of flanges; a second preparation step of preparing a cross-sectionally U-shaped second metal workpiece which has a second base wall, and a pair of second standing walls; a positioning step of positioning the first metal workpiece and the metal workpiece in such a manner that each of two pairs of distal edges of the second standing walls and inner edge regions of the flanges are butted against each other; and a joining step of externally welding a butted region of each of the pairs of the distal edges of the second standing walls and the inner edge regions of the flanges to thereby join the first and second metal workpieces together.

主权项

1. A method of producing a welded structural member internally having a closed cross-section, comprising:
a first preparation step of preparing a cross-sectionally hat-shaped first metal workpiece which has a first base wall, a pair of first standing walls each standing from a respective one of widthwisely opposite edges of the first base wall, and a pair of flanges each bending outwardly from a respective one of distal edges of the first standing walls; a second preparation step of preparing a cross-sectionally U-shaped second metal workpiece which has a second base wall, and a pair of second standing walls each standing from a respective one of widthwisely opposite edges of the second base wall so as to have a distal edge contactable with a corresponding one of inner edge regions of the pair of flanges; a positioning step of positioning the first metal workpiece and the metal workpiece in such a manner that each of two pairs of the distal edges of the second standing walls and the inner edge regions of the flanges are butted against each other; and a joining step of externally welding a butted region of each of the pairs of the distal edges of the second standing walls and the inner edge regions of the flanges to thereby join the first metal workpiece and the second metal workpiece together to form the closed cross-section.