Bolt fastening is an important part of transmission line project. Its quality will directly affect the stability of tower itself, the ability to bear wires and the surrounding safety problems. In the past, bolt tightening was usually carried out manually, which was greatly affected by human factors in the construction process, resulting in the inability to accurately control the bolt torque value, and the tightening effect was not ideal. The torque value can be set according to the needs by using the electric torque wrench to tighten the bolts, but many problems will be encountered in the actual project. This paper analyzes the common problems of electric torque wrench in bolt tightening.

（1）惡劣的施工環(huán)境和現(xiàn)場的高施工強度大大地縮短了電動扭矩扳手的使用壽命，并增加了故障率。電動扭矩扳手的常見故障包括機械故障和電氣故障。機械故障例如加力齒輪容易卡住，設備內部的小螺栓在受到大的振動后容易掉落等。電氣故障包括控制電路和顯示電路，它們容易在過電壓或過流條件下燒壞。

(1) The bad construction environment and high construction intensity greatly shorten the service life of the electric torque wrench and increase the failure rate. Common faults of electric torque wrench include mechanical faults and electrical faults. Mechanical faults, such as the force adding gear is easy to get stuck, and the small bolts inside the equipment are easy to fall after being subjected to large vibration, etc. Electrical faults include control circuit and display circuit, which are easy to burn out under overvoltage or overcurrent conditions.

（2）螺栓的緊固率明顯受到風擺的影響。緊固螺栓后，測試扭矩值，效果良好，基本可以滿足要求。但是，經過一段時間后，由于自然因素（例如風擺）的影響，重新檢查時，螺栓的緊固率顯著降低。

(2) The tightening rate of bolts is obviously affected by wind swing. After tightening the bolts, the torque value is tested, and the effect is good, which can basically meet the requirements. However, after a period of time, due to the influence of natural factors (such as wind swing), the tightening rate of bolts decreases significantly during re inspection.

（3）鋼管塔主材的腳釘和爬梯正下方法蘭盤螺栓，由于其特殊位置而不能使用電動扭矩扳手，只能手動緊固。受人為因素影響，手動緊固難以達到扭矩值標準，且很難統(tǒng)一。

(3) The foot nails of the main materials of the steel pipe tower and the flange bolts directly below the ladder cannot be tightened by electric torque wrench due to their special position, but can only be tightened manually. Affected by human factors, manual tightening is difficult to reach the torque standard, and it is difficult to unify.

（4）電動扭矩扳手對電源的質量有很高的要求，不允許有較大的電壓波動，對電源和電纜的功率也有很高的要求。但是，在施工現(xiàn)場接入電源非常困難，只能使用發(fā)電機進行電源供應。其輸出功率質量差且電壓不穩(wěn)定，這對螺栓緊固的質量影響更大。

(4) The electric torque wrench has high requirements for the quality of power supply, does not allow large voltage fluctuation, and also has high requirements for the power of power supply and cable. However, it is very difficult to access the power supply at the construction site, and only the generator can be used for power supply. Its output power quality is poor and the voltage is unstable, which has a greater impact on the quality of bolt fastening.

以上內容由電動扭矩扳手廠家所介紹的內容，希望有所幫助，更多精彩內容可以直接http://www.ykmzc.com或者搜索：電動扭矩扳手均可找到我們

The above contents are introduced by the electric torque wrench manufacturer. I hope they can be helpful. More wonderful contents can be directly http://www.ykmzc.com Or search: electric torque wrench can find us