To suppress occurrence of burrs at a boundary portion between a forged surface and a turned surface.SOLUTION: An intermediate material 29 is obtained by forging a hard metal material such as carbon steel. The intermediate material 29 has, on an outer peripheral surface, a composite curved surface part 30 having an elementary convex curved surface 31 and an elementary concave curved surface 32 arranged adjacent to the outside in an axial direction of the elementary convex curved surface. A concave curved surface part 8 and a cylindrical surface part 9 are formed by turning at least the elementary concave curved surface 32 and a portion adjacent to the outside in the axial direction of the elementary concave curved surface 32 of the outer peripheral surface of the intermediate material 29.SELECTED DRAWING: Figure 2

    【課題】鍛造面と旋削面との境界部分でのバリの発生を抑える。【解決手段】炭素鋼などの硬質金属製の素材に鍛造加工を施すことにより、中間素材29を得る。中間素材29は、外周面に、素凸曲面31と、該素凸曲面の軸方向外側に隣接して配置された素凹曲面32とを有する複合曲面部30を備える。中間素材29の外周面のうち、少なくとも素凹曲面32および該素凹曲面32の軸方向外側に隣接する部分に旋削加工を施すことで、凹曲面部8および円筒面部9を形成する。【選択図】図2


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    Title :

    OUTER RING FOR HUB UNIT BEARING AND METHOD FOR MANUFACTURING THE SAME


    Additional title:

    ハブユニット軸受用外輪およびその製造方法


    Contributors:

    Publication date :

    2023-09-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / F16C SHAFTS , Wellen / B23B Drehen , TURNING / B23P Sonstige Metallbearbeitung , OTHER WORKING OF METAL / B60B VEHICLE WHEELS , Räder für Fahrzeuge




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