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一、螺栓松弛的原因车辆走行部分的螺栓经常发生松弛,为此进行了专门研究。这项关于“螺栓松弛”的研究,除了包括螺栓完全松弛即轴向力接近于零的状态以外,还包括螺栓轴向力降低的一般情况。螺栓松弛的原因可以考虑:接触部位的状态、热的原因、材质、物理的原因、紧固力等。二、扭矩与轴向力的关系对螺栓的紧固来说,当轴向力接近强度极限时,效果最好。为此,很有必要加强紧固时轴向力的检查。但是,在现车操作时,难以做到一边紧固一边测定轴向力。
First, the reason for the bolt loose Part of the vehicle running on the bolt often relaxation, for which a special study. This study of “bolt loosening” includes a general case where the bolt axial force is reduced in addition to a state in which the bolt is completely loose, ie, the axial force is near zero. The reason for the looseness of the bolt may be considered: the state of the contact part, the cause of the heat, the material, the physical reason, the fastening force and the like. Second, the relationship between torque and axial force Bolt fastening, when the axial force close to the intensity limit, the best results. To this end, it is necessary to strengthen the fastening axial force inspection. However, in the current car operation, it is difficult to measure the axial force while tightening.