扭剪扳手初拧需要用哪种扳手？实际上，扭剪型高强螺栓的初紧可使用冲击电动扳手或定扭矩扳手，而终紧须使用扭剪扳手，所以扭剪扳手是专门终紧扭剪型高强螺栓的。

What kind of wrench is required for the initial tightening of the shear wrench? In fact, the impact electric wrench or fixed torque wrench can be used for the initial tightening of torsional shear high-strength bolts, and the torsional shear wrench must be used for the final tightening, so the torsional shear wrench is specially used for the final tightening of torsional shear high-strength bolts.

初拧扳手，可用电动扳手也可用手动带响扳手。但无论用哪种扳手施工前都须进行标定，以便控制初拧扭距值。手动扳手作为终拧工具时，须每班进行标定，并做好标定记录。扭剪型高强螺栓是一种自标量型螺栓，因此终拧只须把高强螺栓尾部螺栓头拧掉即可，扳手不用标定。

For the initial tightening of the wrench, the electric wrench or the manual ring wrench can be used. However, no matter which wrench is used, calibration must be carried out before construction to control the initial tightening torque value. When the hand wrench is used as the final tightening tool, it shall be calibrated every shift and the calibration record shall be made. Torsional shear high-strength bolt is a self-scalar bolt, so the final tightening only needs to unscrew the bolt head at the end of the high-strength bolt, and the wrench need not be calibrated.

扭剪型高强螺栓，其显著标志就是螺杆前头有一个梅花头，终紧的时候就是以把梅花头打断作为终紧完毕。须采用电动力矩扳手来进行安装。只有当力矩达到要求后，高强螺栓的梅花头才会被拧掉，这样可以保证所使用的螺栓达到须的预紧力从而保证性能。所以在工程中可以通过检查梅花头是否还在还判断高强螺栓是否起到作用，而扭剪型高强螺栓都是一次性也是因为这个原因。

Torsional shear high-strength bolts have a plum head at the front of the screw, and the final tightening is completed by breaking the plum head. Electric torque wrench must be used for installation. Only when the torque meets the requirements, the Torx head of the high-strength bolt will be screwed off, which can ensure that the bolts used reach the required preload and thus ensure the performance. Therefore, in the project, it is possible to determine whether the high-strength bolt works by checking whether the plum blossom head is still in use. This is also the reason why the torsional shear high-strength bolt is disposable.

那么扭剪螺栓专用扳手厂家结合经验所认为，根据高强螺栓的施工工艺要求，高强螺栓的施工须先初拧后终拧，初拧高强螺栓需用冲击型电动扳手或扭矩可调电动扳手；而终拧高强螺栓有严格的要求，终拧扭剪型高强螺栓须用扭剪型电动扳手，终拧扭矩型高强螺栓须用扭矩型电动扳手。

According to the experience of the manufacturer of special wrench for torsion and shear bolts, according to the construction process requirements of high strength bolts, the construction of high strength bolts must be carried out first before final tightening, and the initial tightening of high strength bolts requires impact type electric wrench or torque adjustable electric wrench; However, the final tightening of high-strength bolts has strict requirements. The final tightening of shear-type high-strength bolts must use a shear-type electric wrench, and the final tightening of torque-type high-strength bolts must use a torque-type electric wrench.

一般的扭剪型高强螺栓的初紧会选择手动扳手、冲击电动扳手、电动扭矩扳手或者专门的初紧扳手，而终紧扭剪型高强螺栓就须选择电动扭剪扳手，而不能选择扭矩扳手。（因为终紧的时候须要把梅花头打断，只有扭剪扳手有这个功能。）

Generally, manual wrench, impact electric wrench, electric torque wrench or special initial tightening wrench will be selected for the initial tightening of torsional shear type high-strength bolts, while electric torsional shear wrench must be selected for the final tightening of torsional shear type high-strength bolts instead of torque wrench. (Because the box end needs to be broken when final tightening, only the torsion wrench has this function.)

终拧紧固时应注意，待梅花头全部套入套筒后，才能按下电动扳手开关，若内套筒只套入梅花头尺寸的1/3～1/2长度时按下电动扳手开关，将会造成梅花头打滑，并且影响套筒的使用寿命。紧固时，终拧电动扳手应和构件摩擦面保持垂直，扳手倾斜是很容易导致螺栓尾部梅花头打滑，并易卡壳。

During final tightening, it should be noted that the electric wrench switch can only be pressed after the ring head is fully inserted into the sleeve. If the inner sleeve is only inserted into 1/3~1/2 of the size of the ring head, pressing the electric wrench switch will cause the ring head to slip and affect the service life of the sleeve. When tightening, the final tightening electric wrench should be vertical to the friction surface of the component. The wrench tilt is easy to cause the bolt tail to slip and jam.

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