Auxiliary measuring device for bolt percentage elongation after fracture experiment

The utility model provides an auxiliary measuring device for a bolt percentage elongation after fracture experiment, which comprises a slide rail and a locking assembly, the locking assembly comprises a slide block, a locking bolt and a tightening positioning bolt, the slide block is positioned on the slide rail and slides in a matched manner, and the locking bolt is positioned on the slide rail and slides in a matched manner. A locking hole in threaded connection with the locking bolt is formed in the side, facing the sliding rail, of the sliding block, the two sets of locking assemblies are oppositely arranged and located at the two ends of the sliding rail respectively, and a positioning hole in threaded connection with the jacking positioning bolt is formed in the sliding block in the sliding direction of the sliding block. According to the utility model, the accuracy of the elongation after fracture of bolts in the same batch can be improved by 30%, and the use is convenient. 本实用新型提供一种螺栓断后伸长率实验的辅助测量装置，包括