研究螺栓连接时的许用轴向拉力和扭力矩的目的有两个:一是根据被连接件的结构和受力情况精确地选取不同材质的螺栓规格,二是依据拧紧螺栓时的许用扭力矩确定拧紧功和设计拧紧工具。螺栓的许用轴向拉 The purpose of studying the allowable axial tension and twisting moment when connecting the bolts is as follows: Firstly, according to the structure and force conditions of the connected parts, the bolt specifications of different materials are accurately selected, and the second is based on the allowable torque when tightening the bolts. Determine the tightening work and design the tightening tool. Allowable axial pull of bolt