车削小型套类零件的内孔及端面时,一般采用开缝套筒(图1)配合三爪卡盘夹持零件进行加工,而当加工外圆及端面时,一般采用类似图2所示的张力心轴,这种心轴靠带内锥的螺栓使卡簧体将工件夹紧,由于这种卡簧体张紧部分比较薄,通常开有3～4条槽,经过一段时间使用后,很容易变形,因此常会影响使用和加工质量。 When turning the inner hole and the end surface of a small set of tools, the slotted sleeve (FIG. 1) is generally used to process the parts with the three-jaw chuck. When machining the outer circle and the end surface, a similar method as shown in FIG. 2 Tension mandrel, the mandrel by the taper inside the bolt so that the body will clamp the body clamping, as the body part of the tension spring tension is relatively thin, usually open 3 to 4 slots, after a period of use, Very easy to deform, so often affect the use and processing quality.