| 摘要 |
PROBLEM TO BE SOLVED: To provide a door inner panel as automobile parts capable of simplifying a welding process, avoiding stress concentration due to shapes of different steel sheets, and thereby improving welding accuracy and quality by connecting linear weld lines via an R-shaped weld line in the weld line in the different thickness steel sheets formed by welding together steel sheets with different sheet thicknesses.SOLUTION: This embodiment is applied to a door inner panel as automobile parts which configures different thickness steel sheets by connecting steel sheets of different materials having different sheet thicknesses. The weld line 15 of the different thickness steel sheet 10 of the door inner panel is configured of linear weld lines 15a, 15b and an R-shaped weld line 15c which connects the linear weld lines. |
