WELDING STRUCTURE OF PRESS FORMED PART, STRUCTURAL PART FOR AUTOMOTIVE BODY INCLUDING THE WELDING STRUCTURE, AND METHOD FOR MANUFACTURING WELDING PART (AS AMENDED)

摘要

A welding structure of a press-formed part made by combining and joining two parts formed by press-forming and each having an opening portion on at least one side of a cross-section, while the opening portions face each other, and includes a step portion that is provided by forming a bent projection projecting outwardly on a tip end portion of a side wall portion of a lower side part, partially or entirely on a joining surface. A tip end side of the step portion is fitted into the opening portion of an upper side part, and the step portion of the lower side part and the tip end of a side wall portion of the upper side part are linearly joined by arc welding.