Analysis of the causes of damage to high-strength bolts

The real cause of damage to threaded fasteners is looseness:

After the threaded fasteners are loosened, huge kinetic energy mv2 is generated. This huge kinetic energy directly acts on the fasteners and equipment, causing the fasteners to be damaged. After the fasteners are damaged, the equipment cannot work under normal conditions. , And further damage the equipment.

For fasteners subjected to axial force, the thread is broken and the bolt is broken.

For fasteners that are subjected to radial force, the bolts are cut and the bolt holes are punched into an oval. (Guide: What should be considered when choosing stainless steel screws)

At present, the most advanced and effective anti-loosening method is Down's threaded fastener anti-loosening method.

The thread has the characteristics of both left-hand and right-hand threads. It can be matched with left-handed threads and right-handed threads.

Two kinds of nuts with different rotation directions are used for connection. The nut on the working support surface is called a tightening nut, and the nut on the non-supporting surface is called a lock nut. When using, first pre-tighten the tightening nut, and then pre-tighten the lock nut.

In the case of vibration and impact, the tightening nut will tend to loosen. However, since the loosening direction of the tightening nut is the tightening direction of the tightening nut, the tightening of the tightening nut just prevents the tightening of the nut. Loosening, resulting in the fastening nut cannot be loosened.

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