Presented in the article is a CAD illustrative method for groove opening of rotary piercing mill,which is much simpler and easy-to-use than the mathematic method as used for the same purpose.

• 介绍了一种使用计算机辅助设计(CAD)图解斜轧穿孔孔型开度值的方法,解决了在生产中用数学方法求解斜轧孔型开度值较复杂,难以应用的问题。