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.
Production method of wheel rim, and production method of vehicle wheel rim
2020-05-26
Patent
Elektronische Ressource
Englisch
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 |
PRODUCTION METHOD OF WHEEL RIM, AND PRODUCTION METHOD OF VEHICLE WHEEL RIM
Europäisches Patentamt | 2018
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