建筑施工中,时常接触到正圆锥台展开的放样施工,一般作法是用图解法延长斜边找出圆心后,再按长、短展开半径划出弧带形大样。延长斜边的交点上如果稍有偏差,所得的长、短半径就不准确了。为便于实际使用,现通过一例题导出计算正圆锥台展开半径的简 In building construction, it often comes into contact with the erecting of the straight truncated cones. The general approach is to graphically extend the bevel edge to find the center of the circle, and then use the long and short deployment radius to draw a large arc-shaped strip. If there is a slight deviation in the intersection of the extended bevel, the resulting long and short radii will be inaccurate. In order to facilitate practical use, the calculation of the radius of the development of the positive truncated cone is derived from an example.