这是一种精车按D定心的内花键齿轮的心轴(见图),心轴前端有1:800的导向锥,便于装工件时导向。D部的尺寸应较内花键实际尺寸小0.005至0.01毫米。b部尺寸可按d_(e4)与内花键键宽相配合。L部分的长度应与内花键长度相等,花键的表面位置偏差,可根据内花键的精度等级查表求之。 This is a fine car by D centering the internal spline gear spindle (see photo), the front of the mandrel 1: 800 guide cone, easy to guide the workpiece when installed. Part D should be 0.005 to 0.01 mm smaller than the actual size of the internal spline. b part size can be d_ (e4) and the internal spline key width to match. L part of the length should be equal to the length of the spline, spline surface position deviation, according to the accuracy of the internal spline look-up table seeking.