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在机械制造过程中,我们经常碰到一些高精度要求的薄壁形轴套类零件。常用的机械扩张式心轴满足不了这样的加工要求,而带有锥度的刚性心轴又容易使工件产生变形。为此,我们设计了一种液压扩张式心轴(图1),现将其结构特点,设计要点及制造方法介绍如下,以供参考。一、工作原理与结构液压扩张式心轴是巴斯克原理的一个应用实例。当处在密封状态下的油液,受到由旋紧螺塞推动柱塞向前挤压的外力作用,就在油腔内产生了压力,迫使受压的薄壁弹性套朝直径方向均匀地扩张,从而实现对工件自动定心和夹紧。我们选用了液压油或一般机油作为力的传递介质,其流动性能要比液体塑料或其它介质更好。它对
In the machinery manufacturing process, we often encounter some high-precision requirements of the thin-walled sleeve parts. The commonly used mechanical expansion mandrel can not meet such a processing requirement, and with a tapered rigid mandrel and easy to make the workpiece deformation. To this end, we designed a hydraulic expansion mandrel (Figure 1), now its structural features, design tips and manufacturing methods are introduced below, for reference. First, the working principle and structure Hydraulic expansion mandrel Basque principle is an application example. When the fluid in the sealed state is subjected to an external force that pushes the plunger forwardly by the screwing plug, pressure is generated in the oil chamber to force the compressed thin-walled elastic sleeve to expand uniformly in the diameter direction , In order to achieve automatic centering and clamping of the workpiece. We use hydraulic oil or general oil as the transmission medium of force, and its flow performance is better than liquid plastic or other medium. It is right