种是摩擦防松。这是应用广的一种防松方式，这种方式在螺纹副之间产生一不随外力变化的正压力，以产生一能够阻止螺纹副相对转动的摩擦力。这种正压力可经过轴向或同时两向压紧螺纹副来完成。如采用弹性垫圈、钢筋衔接套筒、自锁螺母和尼龙嵌件锁紧螺母等。这种防松方式关于螺母的拆卸比拟便当，但在冲击、振动和变载荷的状况，开端螺栓会因松弛招致预紧力降落，随着振动次数的增加，损失的预紧力迟缓地增加，终将会招致螺母松脱、螺纹联接失效。
The first is friction and anti-loosening. This is the most widely used anti-loosening method, which produces a positive pressure between the threaded pairs that does not change with the external force to produce a friction that can prevent the relative rotation of the threaded pairs. This positive pressure can be accomplished by axial or simultaneous compression of threaded pairs. For example, elastic washer, reinforcing bar connection sleeve, self-locking nut and nylon insert locking nut are used. This kind of anti-loosening method is convenient for nut disassembly, but in the case of impact, vibration and variable load, the preload of the start bolt will drop due to loosening. With the increase of vibration times, the loss of preload will increase slowly, which will eventually lead to nut loosening and thread connection failure.
第二种方式是机械防松。是用止动件直接限制螺纹副的相对转动。如采用启齿销、串连钢丝和止动垫圈等。由于止动件没有预紧力，螺母松退到止动位置时防松止动件才干起作用，因而，这种方式实践上不防松而是避免零落。
The second way is mechanical anti-loosening. It is to restrict the relative rotation of the screw pair directly with the stop. Such as the use of hoist pins, series steel wire and stop washer. Because the stop has no pre-tightening force, the anti-loosening stop can work when the nut is loosened to the stop position. Therefore, in practice, the anti-loosening stop can not prevent loosening but avoid falling.
第三种方式是铆冲防松。在拧紧后采用冲点、焊接、粘接等办法，使螺纹副失去运动副特性而衔接成为不可拆衔接。这种方式的缺陷是栓杆只能运用一次，且拆卸非常艰难，必需毁坏螺栓副方可拆卸。
The third way is riveting to prevent loosening. After tightening, punching point, welding, bonding and other methods are adopted to make the thread pair lose the characteristics of the motion pair and become an irremovable connection. The defect of this method is that the bolt can only be used once, and the disassembly is very difficult. The bolt must be destroyed before it can be disassembled.
第四种方式是构造防松。是应用螺纹副本身构造，即唐氏螺纹防松方式。
The fourth way is structural loosening prevention. It is the application of thread duplicate body structure, that is, Down's thread loosening prevention method.
咨询热线： 13605413762
