This article presents the shape change of the cold tube bending,and the method of making tubes with ideal minor radius by choosing the mandrel and mastering right methods.

• 介绍了管子在冷态弯制时的变形情况，以及通过合理选择芯棒及掌握其正确的使用方法，达到弯制出理想小半径管件的方法。