检测螺栓轴向应力的新办法

• 作 者: 仲肇森
• 出 处: 国外自动化
• 发表日期: 1980年06期
• 关键词: 螺栓 轴向应力 磨擦系数 扭矩 超声波检测 状态检测 螺纹 螺栓紧固 直线关系 非破坏性

目前,一般是用扭矩法控制螺栓轴向应力大小的。使用这种方法控制螺栓轴向应力实际上并不十分可靠。因为螺纹磨擦系数有误差,所以即使扭矩一定,也不能保证螺栓轴向应力值一定。这就是说用扭矩法是不能测得可靠的螺栓轴向应力。当前如能以非破坏性的方法,又不改变螺栓的紧固状态检测出螺栓的轴向应力那将是很有实用价值的。用超声波检测螺栓轴向应力的新尝试就是在这种情况下研制成功的。

At present, the torque method is generally used to control the axial stress of bolts. Using this method to control the bolt axial stress is actually not very reliable. Because the thread friction coefficient error, so even if the torque is constant, it can not guarantee the bolt axial stress value. This means that the torque method can not be measured reliably bolt axial stress. It would be useful to be able to detect the axial stress on a bolt nowadays in a non-destructive way without changing the tightness of the bolt. A new attempt to detect the axial stress of the bolt with ultrasonic waves was successfully developed in this case.