PROBLEM TO BE SOLVED: To provide a production method of wheel rims, and a production method of vehicle wheel rims, the methods enabling thickening of the opening end edge of a wheel rim with no reduction in production efficiency, and good dimensional accuracy.SOLUTION: A production method of a wheel rim includes: a step of forming a cylindrical rim material into a rim shape; and a step of increasing a sheet thickness of at least one opening end edge of the rim material at least one of before and after the step of forming of the cylindrical rim material. In addition, in the step of increasing of the sheet thickness, in a state in which the opening end edge is inserted into an annular groove of a die provided with the annular groove which is wider than the sheet thickness of the opening end edge, a thickened portion is formed by exerting a compressive load in an axial direction of the rim material on the opening end edge.SELECTED DRAWING: Figure 3

    【課題】生産効率を低下させることなく、また、高い寸法精度をもって、ホイールリムの開口端縁の増肉を行うことができる、ホイールリムの製造方法及び自動車用ホイールリムの製造方法を提供する。【解決手段】このホイールリムの製造方法は、円筒状のリム素材をリム形状に成形加工する成形工程と;前記成形工程前後の少なくとも一方において前記リム素材の少なくとも一方の開口端縁の板厚を増す増肉工程と;を備える。そして、前記増肉工程で、前記開口端縁の板厚よりも幅広の環状溝を持つ金型の前記環状溝内に前記開口端縁を挿入した状態で、前記開口端縁に対して前記リム素材の軸線方向の圧縮荷重をかけて増肉部を形成する。【選択図】図3


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    Title :

    PRODUCTION METHOD OF WHEEL RIM, AND PRODUCTION METHOD OF VEHICLE WHEEL RIM


    Additional title:

    ホイールリムの製造方法及び自動車用ホイールリムの製造方法


    Contributors:

    Publication date :

    2018-04-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    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 / B21J FORGING , Schmieden / B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern / B60B VEHICLE WHEELS , Räder für Fahrzeuge



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