A lightweight hollow member having excellent stiffness and impact properties and which is suitable for automotive parts due to having a high strength such as at least 780 MPa and a complicated shape is provided. A hollow member 11 has a hollow steel body 14. The body 14 is constituted by a single member at least in the lengthwise direction. The body 14 has a non-equidimensional cross section having at least a portion with a maximum outer dimension L 1 and a portion with an outer dimension L 2 shorter than the maximum outer dimension L 1 . The body 14 has a twisted portion in a portion of its length. The angle of intersection between an imaginary plane 15a including the portion having the maximum outer dimension L 1 in a first portion 15 present on one side of the body 14 in the lengthwise direction with the twisted portion 17 as a border and an imaginary plane 16a including the portion with the maximum outer dimension L 1 in a second portion 16 present on the other side in the lengthwise direction of the body 14 with the twisted portion 17 as a border is at least 4 degrees. The twisted portion 17 has a tensile strength of at least 780 MPa.


    Access

    Download


    Export, share and cite



    Title :

    HOLLOW MEMBER


    Additional title:

    HOHLKÖRPER
    ÉLÉMENT CREUX


    Contributors:

    Publication date :

    2016-09-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B62D MOTOR VEHICLES , Motorfahrzeuge



    HOLLOW MEMBER

    HIROSE SATOSHI / NAKAZAWA YOSHIAKI | European Patent Office | 2019

    Free access

    HOLLOW MEMBER

    HIROSE SATOSHI / NAKAZAWA YOSHIAKI | European Patent Office | 2024

    Free access

    HOLLOW MEMBER

    HIROSE SATOSHI / NAKAZAWA YOSHIAKI | European Patent Office | 2020

    Free access

    HOLLOW MEMBER

    HIROSE SATOSHI / NAKAZAWA YOSHIAKI | European Patent Office | 2019

    Free access

    HOLLOW MEMBER

    HIROSE SATOSHI / NAKAZAWA YOSHIAKI | European Patent Office | 2019

    Free access