The Real Effect Of Temperature Change On The Life Of Bolt-type Tension Clamps

In the operation of power lines, the bolted type strain clamp is a "busy person" that bears the responsibility of tension and stable connection. When the temperature rises, especially in high-temperature or large-temperature environments, their lifespan will be affected. Metal materials undergo gradual changes due to thermal expansion and contraction, which directly affects the durability of wire clips. When working at high temperatures for a long time, the properties of the material will gradually degrade, and the mechanical stability of the wire clamp will also be compromised.

Material reaction at high temperatures

When the temperature rises, the metal in dead end strain clamp expands, and the tightening force of the bolts also changes accordingly. Sometimes, you'll notice that previously tight bolts gradually loosen; this is due to thermal stress. Over time, micro-deformation or creep may occur within the metal, reducing the clamp's load-bearing capacity. Experiments show that above a certain temperature, the clamp's anti-slip performance significantly weakens, demonstrating the substantial impact of temperature on tightening.

The effects of hot and cold cycles

It's not just high temperatures that affect wire clamps. It's hot during the day and cold at night, and the bolted dead end clamp is constantly "tortured" when the seasons change drastically. This cycle of hot and cold temperatures causes microcracks to accumulate inside the material, and the bolt tightening force may be repeatedly adjusted. Over time, fatigue increases, naturally shortening the lifespan. The impact of temperature fluctuations on stability is cumulative, not simply a matter of a single high-temperature event.

From the perspective of temperature effects during disassembly:

• Changes in bolt tightening force: At high temperatures, metal softens, and the original tightening force of the bolt may decrease, affecting the overall tightening state of the clamp.

• Thermal fatigue accumulation: Repeated thermal expansion and contraction can cause micro-damage to the contact surface, and the material properties will gradually weaken.

• Structural micro-deformation: The connection parts will undergo slight deformation under the influence of temperature. Over time, the mechanical performance of the entire structure may be different from that in the design.

In summary, the impact of temperature changes on bolt-type tension clamps is significant. Understanding the characteristics of ambient temperature is crucial for better assessing the long-term performance of clamps and providing a basis for maintenance and repair.