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对于盘类、轴套类工件,常具有外圆对孔的同轴度、端面对孔的圆跳动等技术要求,在加工中为达到这些要求而常用的定位元件是锥度心轴。它利用工件的基准孔与锥度心轴工作表面较正确的接触,使之具有较高的定心精度。其中心轴锥度K值是决定工件加工精度的关键参数。一、锥度K值的选择心轴锥度K值取得小,则定心精度可以提高,且孔与心轴接触面间的弹性变形区域增大,使工件夹紧可靠。所带来的问题是对一批工件而言,由于基准孔尺寸有一定的公差,会使工件在心轴上的轴向位置每
For the disc, sleeve type of workpiece, often with the outer circle of the coaxial hole, the hole on the face of the beat and other technical requirements, in processing to achieve these requirements and commonly used positioning element is tapered mandrel. It uses the workpiece reference hole and taper spindle working surface more accurate contact, so that it has a high centering accuracy. Its central axis taper K value is the key parameter that determines the machining accuracy. First, the choice of taper K Value of spindle taper K made small, the centering accuracy can be increased, and the contact area between the hole and the mandrel elastic deformation increases, so that the workpiece clamping and reliable. The problem is that for a group of workpieces, due to the size of the reference hole has a certain tolerance, the workpiece will make the axial position on the mandrel