在初轧机或中小型开坯机轧制的头几道,希望压下量越大越好,但是客观上却难以实现。限制压下量的主要因素是咬入条件。毛主席教导说:“分析的方法就是辩证的方法。所谓分析,就是分析事物的矛盾”。下面,我们简单分析一下咬入瞬间轧辊对轧件的作用力。两个轧辊直径相等,转速相等的简单轧制条件下,作用力是对称的(如图1所示)。转动着的轧辊作用于轧件以正压力 P 和摩擦力 T。轧件能否顺利地被轧辊咬入并沿水平方向继续向前运动,取决于正压力的水平分力 P_x 和摩擦力的水平分力 T_x 的大小。P_x 与 T_x 作用方向相反,P_x 力图把轧 In the first rolling mill or small and medium-sized open rolling the first few Road, I hope the greater the better the reduction, but objectively difficult to achieve. The main factor limiting the amount of pressure is bite conditions. Chairman Mao taught: “The method of analysis is a dialectical method, and the so-called analysis is the analysis of the contradictions of things.” Below, we briefly analyze the instant nip roll on the rolling force. The two rollers are equal in diameter and rotate at the same speed under simple rolling conditions, the force is symmetrical (as shown in Figure 1). The rotating roll acts on the rolling stock at positive pressure P and frictional force T. Rolling can be successfully bite into the roller and continue to move forward in the horizontal direction, depending on the horizontal component of the positive pressure P_x and the horizontal component of friction T_x size. P_x and T_x role in the opposite direction, P_x trying to put the rolling