| 摘要 |
A method of producing a door frame, which includes a tubular portion which is positioned on a vehicle interior side and has a closed cross-sectional shape, a design portion which is positioned on a vehicle exterior side, and a connecting portion which connects the tubular portion and the design portion; the method includes forming a frame body having a uniform cross section by roll-forming a metal sheet, the frame body including the tubular portion, the design portion and the connecting portion; and varying a width of the tubular portion by press-deforming a section of the tubular portion toward the vehicle interior side. |
