The invention provides a manufacturing technology of a bolt hole of a lightweight steel wheel nut seat and a wheel to effectively improve the strength of the lightweight steel wheel nut seat and ensure the wheel safety. The manufacturing technology of the bolt hole comprises the following steps: S1, pre-punching the bolt hole position of the nut seat to form a bolt straight hole, wherein the porediameter of the pre-punched hole is 0.3-1.0 mm less than the pore diameter of a finally formed bolt hole; and S2, carrying out secondary extrusion forming on the bolt hole punched in S1 to enable an annular boss to be formed on the lower end face of the bolt hole and extruding the bolt hole into a conical surface or spherical surface. The annular boss is arranged at the lower port of the bolt holeof the lightweight steel wheel nut seat, and the internal diameter of the annular boss is the same as that of the bolt hole.

    本发明提供了一种轻量化钢制车轮螺母座的螺栓孔制造工艺及车轮,有效提高轻量化钢制车轮螺母座强度,保证车轮的安全,本发明所述螺栓孔制造工艺包括以下步骤:S1、对螺母座的螺栓孔位置进行预冲孔,冲压出螺栓直孔,所述预冲孔冲压出的孔径比最终成型的螺栓孔的孔径小0.3‑1.0mm;S2、对步骤S1中冲压出的螺栓孔进行二次挤压成型,使螺栓孔下端面形成环形凸台,并将螺栓孔挤压出锥面或球面,所述轻量化钢制车轮螺母座的螺栓孔下端口处设有一环形凸台,所述环形凸台内径与螺栓孔内径相等。


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    Title :

    Manufacturing technology of bolt hole of lightweight steel wheel nut seat and wheel


    Additional title:

    一种轻量化钢制车轮螺母座的螺栓孔制造工艺及车轮


    Contributors:

    Publication date :

    2020-11-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    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 / B60B VEHICLE WHEELS , Räder für Fahrzeuge



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