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US 8,887,397 B2Granted
Door inner panel for automobile and method of manufacturing same
AssigneeSuzuki Motor Corporation
InventorYoshitaka Kobayashi
Life of this patent
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Abstract
A door inner panel as automobile parts is manufactured from a tailor welded blank formed from a different thickness steel sheet by means of different thickness connection for connecting different kind steel sheets having different sheet thicknesses. In the tailor welded blank, a weld line of the tailor welded blank includes linear weld line portions and a curved weld line portion through which the linear weld lines are connected.
Claims3
A method for manufacturing a door inner panel for an automobile, comprising the steps of:
- preparing two different steel sheets comprising a thin sheet and a thick sheet, the thin sheet having a cutout portion with a curved portion, and the thick sheet being arranged in the cutout portion of the thin sheet;
- overlapping the thin sheet and the thick sheet at the curved portion to form an overlap margin portion;
- performing butt welding between linear portions of the cutout portion of the thin sheet and the thick sheet to form linear weld line portions;
- and
- performing lap welding at the overlap margin portion between the thin sheet and the thick sheet to connect the linear weld line portions via a curved weld line portion to thereby form a different thickness steel sheet as a tailor welded blank.
2 more elements
Dependencies are inferred from the claim text.