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用运动学方法分析了等速万向节外套缩径模具的可行性。计算出凸模锥面角度值，给出凸模径向运动方程式及弹簧力表达式。
The kinematics method was used to analyze the feasibility of constant velocity universal joint die. Calculate the angle value of the conical surface of the punch and give the expression of the radial movement equation of the punch and the spring force.