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本文通过应力分析建立一个明确的概念:螺柱本身因拧紧而产生的应力要比因承受工作负荷而产生的应力大得多。所以,在重要的联结部位,为保证安全,对拧紧力矩必须严加控制。过大的拧紧力矩会严重削弱联结强度,是可能导致螺柱折断事故的主要危险。并从而提出计算最佳拧紧力矩的方法。一、拧紧力矩与轴向压紧力的关系螺纹联结的受力情况可以按图1所示的斜面进行分析。图中F为拧紧力,Q为轴向压紧
In this paper, we establish a clear concept through stress analysis: the stress caused by tightening the stud itself is much greater than the stress caused by the workload. Therefore, in important connection parts, in order to ensure safety, the tightening torque must be strictly controlled. Too large a tightening torque can severely impair the coupling strength, which is a major danger that can lead to stud breakage. And then the method to calculate the best tightening torque is put forward. First, the relationship between tightening torque and axial compression force Threaded coupling force situation can be analyzed as shown in Figure 1 of the bevel. F is tightening force in the figure, Q is axial compression