在GB232-63“金属冷热弯曲试验”标准中,当试验材料要求弯曲α角时(图1),没有规定测量角度的方法,也未规定测角精度,而在实际的弯曲试验过程中又不便直接准确测量弯曲角度α。我们在实际操作中摸索出三种以长度来量度角度的方法,现介绍如下,以供参考。 In the GB232-63 “metal hot and cold bending test ” standard, when the test material required to bend the alpha angle (Figure 1), there is no method of measuring the angle, nor does it provide angular accuracy, and in the actual bending test process It is inconvenient to directly and accurately measure the bending angle α. We explored in practice three ways to measure the length of the length, are presented below, for reference.