在通风管道制作中,圆形弯头的展开放样,目前多应用画法几何方法求得。这种方法由于受到多种因素的影响,展开样板经常出现误差,放样时间也较长。下面是笔者根据一些图算法知识,对圆形弯头展开放样进行的一些尝试,供参考。 In the production of ventilation ducts, the open bends of circular elbows are currently applied to descriptive geometry methods. This method is affected by many factors, errors often occur in the extended model, and the time for setting up is longer. The following are some attempts by the author based on some of the graph algorithm knowledge, open elliptical open sample for reference.