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    • 23. 发明授权
    • Method of rolling a metal workpiece
    • 轧制金属工件的方法
    • US4307595A
    • 1981-12-29
    • US99726
    • 1979-12-04
    • Michio NishikuboSei MiuraKouki NanbuMatsuo Ataka
    • Michio NishikuboSei MiuraKouki NanbuMatsuo Ataka
    • B21B1/02B21B1/04B21B1/16B21B1/18B21B1/26B21B3/00B21B37/52B21B39/00B21B39/06B21B39/14B21B39/16B21B1/00
    • B21B37/52B21B1/16B21B1/18B21B1/04B21B1/265B21B2001/022B21B2003/001B21B2003/005B21B2265/10B21B2273/08B21B39/006B21B39/06B21B39/14B21B39/165
    • A metal workpiece is rolled in a rolling mill, including an upstream rolling stand or pinch rolls and more than one stream rolling stand. The roll gaps of the workrolls of the downstream rolling stand are set so that the eqivalent contact angle .theta.e (.theta.e=tan.sup.-1 (cos .alpha..times.tan .theta.) wherein .theta. denotes the contact angle between the workrolls in the bottom of the roll groove and the workpiece and .alpha. denotes the inclined angle of the groove) is larger than tan.sup.-1 .mu. (.mu. denotes a coefficient of friction between the workpiece and the workrolls at the time of biting therebetween and also is smaller than tan.sup.-1 .mu.' (.mu.' denotes a coefficient of friction between the workpiece and the workrolls when the workpiece is completely bitten between the workrolls and the rolling operation is in progress). The workpiece is fed to the downstream rolling stand by the upstream rolling stand or the pinch rolls by causing a compressive stress, which is below the yield stress at the rolling time, on the workpiece in a direction along the rolling line which is located between the upstream rolling stand or pinch rolls and the downstream rolling stand.
    • 金属工件在轧机中轧制,包括上游轧制机架或夹送辊和多于一个流动轧制机架。 设定下游轧制机架的轧制间隙,使得等效接触角θe(θe = tan -1(cosαx tan theta))其中θ表示辊槽底部的工作辊之间的接触角 并且工件和α表示槽的倾斜角)大于tan-1 mu(μ表示在咬合之间工件和工件之间的摩擦系数,并且还小于tan -1 mu'( mu'表示当工件被完全咬合在工件之间并且轧制操作正在进行时工件与工件之间的摩擦系数),通过上游轧制机架或夹送辊将工件供给到下游轧制机架 导致在轧制时的轧制时的屈服应力低于沿着轧制线的方向的工件在位于上游轧制机架或夹送辊之间的压缩应力 wnstream轧机架。