在工厂常常需要磨削薄壁管子的外径和内径,有时管子壁太薄以致无法承受夹具的夹紧力,造成尺寸超差。 试图解决这一问题的办法是在管子的夹紧端插入一只支承环。但是,这样做就要求支承环有很高的精度,并且很难操作。 现在采用了一种更好的解决办法。这就是引入O型环以制成一种非常简单的涨式心轴。这一办法就能完全保证磨削精度,并可节省大量的调整时间。心轴在夹紧端带有法兰,尾端车有螺纹,并由几个管状垫圈、一些 In factories it is often necessary to grind the outer and inner diameters of the thin-walled tube, sometimes too thin to withstand the grip of the clamp, resulting in oversized dimensions. An attempt was made to solve this problem by inserting a support ring at the clamping end of the tube. However, doing so requires that the support ring has a high degree of accuracy and is difficult to handle. Now a better solution is adopted. This is the introduction of an O-ring to make a very simple up mandrel. This method can fully guarantee the grinding accuracy, and can save a lot of adjustment time. The mandrel has a flange on the pinch end, the tail end of the car is threaded and consists of several tubular washers, some of them