1、高強螺栓的緊固須分為兩次進行，為初擰，初擰緊固到螺栓標準軸力(即預拉力)的60%-80%，初擰的扭矩值不得小于終擰扭矩值的30%，第二次緊固為終擰，為使螺栓群中所有螺栓均勻受力，初擰、終擰都應嚴格按照緊固順序操作，按“米”字型對稱操作。

1. The tightening of high-strength bolts must be carried out in two stages. The first stage is the initial tightening, which should be tightened to 60% -80% of the standard axial force (i.e. pre tension) of the bolt. The initial tightening torque value should not be less than 30% of the final tightening torque value. The second stage is the final tightening. In order to ensure that all bolts in the bolt group are evenly stressed, both the initial and final tightening should be strictly operated in the tightening sequence, symmetrically in the "meter" shape.

2、初擰完畢的螺栓，應做好標記以供確認，為防止漏擰，當天安裝的螺栓，當天應終擰完畢，不得在雨天安裝螺栓，且摩擦面應處于干燥狀態，終擰扭矩須按設定值要求進行。

2. The bolts that have been initially tightened should be marked for confirmation. To prevent missing tightening, bolts installed on the same day should be fully tightened on the same day. It is not allowed to install bolts on rainy days, and the friction surface should be in a dry state. The final tightening torque should be according to the set value requirements.

3、嚴格按照電動扭矩扳手操作規程進行操作，每次用完扳手后一定要歸零，以免造成彈簧的金屬疲勞，應定期校準標定扳手的扭矩值，其偏差不大于5%。

3. Strictly follow the operating procedures for electric torque wrenches. After each use, the wrench must be reset to zero to avoid metal fatigue of the spring. The torque value of the calibrated wrench should be calibrated regularly, with a deviation of no more than 5%.

4、假設緊固螺栓的力矩或預緊力很準，但由于外力，溫度變化、振動等因素，一段時間后的預緊力仍會變化，仍須校核。

4. Assuming that the torque or pre tightening force for tightening bolts is accurate, but due to external forces, temperature changes, vibrations, and other factors, the pre tightening force will still change after a period of time and still needs to be verified.

所以說，擰螺絲也不是你想象中那么簡單的。

So, tightening screws is not as simple as you imagine.

高強度螺栓連接作為鋼橋連接的重要方式，因其效率高、性能好、可靠的優點，在工程領域得到了廣泛的應用，施工用的扭矩扳手，其誤差應控制在±5%，因此，緊固大六角螺栓需采用的緊固工具。螺栓因受力大小不達標從而導致質量事故得不償失。山東漢普機械電動扳手專用于緊固有扭力要求的大六角高強螺栓，工作時需提前設定好要求的扭矩值，機器達到設定好的扭矩之后自動停止。

High strength bolt connection, as an important way of connecting steel bridges, has been widely used in the engineering field due to its advantages of high efficiency, good performance, safety and reliability. The error of torque wrenches used in construction should be controlled within ± 5%. Therefore, professional tightening tools are required to tighten large hexagonal bolts. The quality accident caused by substandard force on bolts is not worth the loss. Shandong Hanpu Mechanical Electric Wrench is specially designed to tighten large hexagonal high-strength bolts with torque requirements. When working, the required torque value needs to be set in advance, and the machine will automatically stop after reaching the set torque.

感謝您的閱讀，此文的文章來源：扭剪螺栓專用扳手更多的內容和問題請點擊： http://m.bjqunyao.com我們會繼續努力的為您提供服務，感謝您的支持！

Thank you for reading. The source of this article is the torque shear bolt wrench. For more information and questions, please click: http://m.bjqunyao.com We will continue to work hard to provide you with services. Thank you for your support!