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来源：https://www.xjnwz.com 日期：2021-08-25 发布人：admin


Torsional shear type high-strength bolts must be installed with an electric torque wrench. Only when the torque meets the requirements, the plum blossom head of the high-strength bolt will be screwed off, so as to ensure that the bolt used reaches the necessary preload, so as to ensure the performance. Therefore, in the project, we can judge whether the high-strength bolts play a role by checking whether the plum blossom head is still in use, and it is also for this reason that the torsional shear high-strength bolts are disposable
1. The initial tightening wrench can be an electric wrench or a manual ring wrench. However, no matter which wrench is used, it must be calibrated before construction in order to control the initial torque value. When the manual wrench is used as the final tightening tool, it must be calibrated every shift and the calibration record must be made.
2. Final lemon wrench: the torsion shear high-strength bolt is a self scalar bolt, so the final tightening only needs to screw off the bolt head at the tail of the high-strength bolt, and the wrench does not need to be calibrated.
3. During final tightening, it should be noted that the electric wrench switch can only be pressed after all the ring heads are sleeved into the sleeve. If the inner sleeve is sleeved into only 1 / 3 ~ 1 / 2 of the length of the ring head, pressing the electric wrench switch will cause the ring head to slip and affect the service life of the sleeve.
4. When tightening, the final tightening electric wrench shall be perpendicular to the friction surface of the component. The inclination of the wrench is easy to cause the plum blossom head at the tail of the bolt to slip and jam.
The above is the relevant content introduced by the torsion shear wrench manufacturer. I hope it can help you. For more wonderful content, you can call directly for consultation!