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一、摆轴限转装置的意义与限转方法摆辗锥形表面的上模的运动有二种:一是在垂直于主旋转轴的平面即工件表面上做定点纯滚动,二是绕其本身的辅线自转。当上模的锥面在工件表面上作纯滚动时,由上模的锥面沿工件表面的展开图(图1)可以看出每滚过一圈,上模相对于工件会滞后一个角度。如开始时上模与工件在A_1点接触,滚过一圈后在A_2点接触,那么滞后角即为∠A_1OA_2,令其值为θ:
First, the meaning of the pendulum limiter device and the limited rotation method The pendulum cone-shaped surface of the upper mold movement there are two: First, in the plane perpendicular to the main axis of rotation of the workpiece surface to do fixed pure rolling, and second, around it Subsoil itself rotation. When the taper surface of the upper die rolls purely on the surface of the workpiece, it can be seen from the developed view of the taper surface of the upper die along the surface of the workpiece (Figure 1) that the upper die lags behind the workpiece by an angle. As the beginning of the mold and the workpiece contact at the A_1 point, after a lap rolling contact at A_2 point, then the lag angle is ∠A_1OA_2, make its value θ: