| 摘要 |
Provided is a method for manufacturing a door sash such that rust is prevented and adhesion to a weatherstrip is improved. The method for manufacturing a door sash formed from a single plate comprises: a roll-forming step of performing roll-forming such that a gap (S) is created between plate sections which form a stepped part (12) and such that a plate section extending from a tubular section (13) has an end portion which, along with its surrounding area, comes into contact along the plate sections which form the stepped part (12); a pressing step of pressing the abovementioned end portion of the plate section, while crushing the gap part (S), to a position where the end portion will not protrude to the side where the weatherstrip (17) is fitted beyond the surface (111) of an overlapping section (11) and surface (131) of the tubular section (13) on the side where the weatherstrip is fitted; and a welding step of continuously laser-welding the overlapping section (11) along the longitudinal direction of the door sash. |
