The invention relates to a side wall inner board of an automobile. The side wall inner board comprises a side wall inner board body which is of an automobile door frame type structure. A column body B is arranged on one side of the door frame type structure. The side wall inner board is characterized in that the upper portion of the column body B is a hard area, the lower portion of the column body B is a soft area, and the hard area and the soft area are connected through a first transition area; a martensite structure with the strength of 300-1500 MPa is obtained in the hard area through the ultrahigh-strength steel thermoforming technology; a ferrite and pearlitic structure with the strength of 500-700 MPa or a banite structure is obtained through slow cooling in the ultrahigh-strength steel thermoforming technology in the soft area; the lower end of the side wall inner board body and the soft area of the column body B are connected through a second transition area, and the second transition area is in a right-angle shape and surrounds the soft area of the column body B. The column B has good strength and can protect passengers, and meanwhile the column B can controllably deform. In addition, transition between the column B and the side wall inner board meets the design requirement, and the strength of a side wall is ensured.
Side wall inner board of automobile
2015-04-22
Patent
Elektronische Ressource
Englisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
Europäisches Patentamt | 2024
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