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图a所示涨口心轴可用在金切机床和测具上装夹零件、心轴的材料为65Mn。 心轴由尾柄1、定心套2和压紧圆柱3所组成。在定心套2上有两个锥段和一个圆柱段,并做有纵向通槽。在锥段和圆柱段连接处有小槽4,从而当轴向力作用在心轴上时,可使定心套产生弹性变形,并可将装在其上的零件夹紧。 尾柄的形状取决于设备的配合孔形状,可圆柱形、锥形和其它形状。压紧圆柱3在车床的尾座套筒作用时可承受轴向力。 定心套的配合表面可以是光滑面或者网纹面,有各种轴向截面形状（图b）。定心套的外径较被加工毛坯的配合直径大0.01～0.1mm。由于心轴的锥面有弹性变形,故可将毛坯装夹在心轴上。 若毛坯的孔径较心轴直径大得多,则装上毛坯后必须施力于压紧圆柱。此时,定心套元件将径向移
Figure a rose mouth mandrel can be used in the gold cutting machine tools and fixture parts, the mandrel material is 65Mn. The mandrel is made up of the tailstock 1, the centering sleeve 2 and the pressing cylinder 3. The centering sleeve 2 has two conical sections and a cylindrical section, and has a longitudinal through slot. There is a small slot 4 at the junction of the conical section and the cylindrical section so that when the axial force acts on the spindle, the centering sleeve can be elastically deformed and the part mounted thereon can be clamped. The shape of the caudal pedicle depends on the shape of the mating hole of the device, which can be cylindrical, tapered, and other shapes. Compression cylinder 3 in the lathe tailstock sleeve can withstand axial force. The mating surfaces of the centering sleeves can be smooth or textured with various axial cross-sectional shapes (Figure b). The diameter of the centering sleeve is larger than that of the processed blank by 0.01 ~ 0.1mm. Due to the elastic deformation of the cone mandrel, it can clamp the blank in the mandrel. If the billet diameter is much larger than the diameter of the mandrel, the blank must be applied to the compacted cylinder after it is loaded. At this point, the centering sleeve element will move radially