反复弯曲试验次数是反映钢丝韧性的重要指标之一，现有反复弯曲试验机存在夹具多且在试验过程中夹具容易对钢丝表面产生损伤的问题，因此对反复弯曲试验的夹具进行了改进。结果表明：改进后的新夹具解决了旧夹具在反复弯曲试验过程中易对钢丝表面产生损伤的问题，减少了夹具的总数量，提高了夹具的使用效率。

The number of repeated bending test was one of the important indexes reflecting the toughness of steel wire. There were many clamps in the repeated bending test machine, and the clamps were easy to damage the steel wire surface during the test. Therefore, the clamps for repeated bending test were improved. The results show that the improved new clamps solved the problem that the old clamps were easy to damage the steel wire surface during the repeated bending test, reduced the total number of the clamps, and promoted the use efficiency of the clamps.