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为满足生产要求,我们设计了一种高精度弹性涨开心轴,其结构如图。心轴两端顶住中心孔,用鸡心夹作传动。转动压紧螺母,推动锥套(弹性锥套锥度部分开有三条槽,均布),在锥度的导向下,使弹性套在两端锥体的作用下自动涨开,达到涨紧工件的目的。松开螺母,在压力弹簧作用下使锥套移动脱开,使弹性套复位,松开工件。要求工件孔粗糙度低于1.6,孔的不圆度在0.01mm范围内,主轴顶尖与尾架顶针间的加工件,其锥度小于0.01mm。在上述条件下精车外圆或磨外圆,其同轴度误差小于0.005mm,精车端面可使端面对孔轴线的垂直度误差小于0.005mm。该心轴制造简单,由于采用弹性锥套,消除了锥套与心肘间的间隙误差,使其成为无间隙配合。由于
In order to meet the production requirements, we have designed a high-precision elastic expansion mandrel, the structure shown in Figure. Center the two ends of the mandrel to withstand the center hole, with the chicken heart for transmission. Turn the compression nut to push the taper sleeve (the taper part of the elastic taper sleeve has three grooves and evenly distributed), and under the guidance of the taper, the elastic sleeve will automatically expand under the action of cone at both ends to achieve the purpose of tensioning the work piece . Loosen the nut, under the action of the pressure spring so that the sleeve moves away from the sleeve, the elastic sleeve reset, release the workpiece. Requires the workpiece hole roughness of less than 1.6, the hole non-circularity in the range of 0.01mm, the spindle tip and the tailstock thimble between the workpiece, the taper is less than 0.01mm. Under the above conditions, fine cylindrical or cylindrical grinding cylindrical, coaxial error less than 0.005mm, fine end face can make the end face of the hole axis perpendicularity error is less than 0.005mm. The mandrel is simple to manufacture. Due to the adoption of elastic taper sleeve, the clearance error between the taper sleeve and the heart and elbow is eliminated, making it a seamless fit. due to