The invention provides a manufacturing method for a vehicle torsion beam. The manufacturing method comprises the following steps that the molding process is carried out, specifically, pressure molding is carried out on a circular long pipe with a first preset length so as to form the torsion beam, wherein the first metallographic structure with a first preset length is mainly ferrite and pearlite; the quenching process is carried out, specifically, quenching heat treatment is carried out on the intermediate part of the molded torsion beam; the tempering process is carried out, specifically, the intermediate part or the whole of the quenched torsion beam is tempered, the end part of the tempered torsion beam is of the first metallographic structure, the intermediate part of the tempered torsion beam is of a second metallographic structure, and the second metallographic structure is mainly martensite; and the cutting process is carried out, specifically, the end part of the tempered torsion beam is cut by a fourth preset length to form a cutting surface, and a third preset length is larger than the fourth preset length. The manufacturing method has the advantage that the technical problem that the mechanical property of the end part of the torsion beam becomes poor in the welding process in the prior art can be solved through the technical means of stamping multi-section preforming and the technical means of local heat treatment. The invention further provides a vehicle torsion beam rear axle assembly.

    本发明提供一种车用扭力梁制造方法,包含以下工序:成型工序,将第一预设长度的圆型长管进行压力成型后形成扭力梁,第一预设长度的第一金相组织主要为铁素体及珠光体;淬火工序,对成型后的扭力梁的中间部进行淬火热处理;回火工序,对淬火后的扭力梁的中间部或整体进行回火,回火后扭力梁的端部呈第一金相组织,中间部呈第二金相组织,第二金相组织主要为马氏体;切割工序,对回火后的扭力梁的端部进行第四预设长度的切割,以形成切割面,第三预设长度大于第四预设长度。藉此本发明通过冲压多段预成型的技术手段加上局部热处理的技术手段解决了现有技术的扭力梁在焊接时,端部的力学性能变差的技术问题。本申请另提供一种车用扭力梁后桥总成。


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    Title :

    Manufacturing method for vehicle torsion beam and vehicle torsion beam rear axle assembly


    Additional title:

    一种车用扭力梁制造方法和车用扭力梁后桥总成


    Contributors:
    KANG ZHENG (author) / JIN GUIRUN (author) / KANG YIKAI (author) / WANG XIAOGANG (author) / ZHANG XIAO (author) / LI SHAOHUA (author)

    Publication date :

    2021-04-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B23P Sonstige Metallbearbeitung , OTHER WORKING OF METAL / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge



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