在机床夹具设计中，对于工件的端面或圆柱表面的加工，通常以圆柱销及其垂直平面作定位基准，在轴孔中定心的圆柱定位销高度过去主要是凭经验确定。这样有时会出现定位销被卡住、破裂或使工件内孔擦伤等现象，如采用定位销高度计算法，这一现象便得以解决，其计算如下： 　　圆 In the design of machine tool fixtures, usually the cylindrical pin and its vertical plane are used as the positioning reference for the machining of the end face or the cylindrical surface of the workpiece. The height of the cylindrical dowel pin centered in the axial hole has mainly been empirically determined in the past. This sometimes occurs when the positioning pin is stuck, broken or scratches the workpiece hole, etc., such as the use of positioning pin height calculation method, this phenomenon will be solved, which is calculated as follows: Round