扭剪扳手初擰需要用哪種扳手？實(shí)際上，扭剪型高強(qiáng)螺栓的初緊可使用沖擊電動(dòng)扳手或定扭矩扳手，而終緊須使用扭剪扳手，所以扭剪扳手是專門終緊扭剪型高強(qiáng)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.

初擰扳手，可用電動(dòng)扳手也可用手動(dòng)帶響扳手。但無(wú)論用哪種扳手施工前都須進(jìn)行標(biāo)定，以便控制初擰扭距值。手動(dòng)扳手作為終擰工具時(shí)，須每班進(jìn)行標(biāo)定，并做好標(biāo)定記錄。扭剪型高強(qiáng)螺栓是一種自標(biāo)量型螺栓，因此終擰只須把高強(qiáng)螺栓尾部螺栓頭擰掉即可，扳手不用標(biāo)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.

扭剪型高強(qiáng)螺栓，其顯著標(biāo)志就是螺桿前頭有一個(gè)梅花頭，終緊的時(shí)候就是以把梅花頭打斷作為終緊完畢。須采用電動(dòng)力矩扳手來(lái)進(jìn)行安裝。只有當(dāng)力矩達(dá)到要求后，高強(qiáng)螺栓的梅花頭才會(huì)被擰掉，這樣可以保證所使用的螺栓達(dá)到須的預(yù)緊力從而保證性能。所以在工程中可以通過(guò)檢查梅花頭是否還在還判斷高強(qiáng)螺栓是否起到作用，而扭剪型高強(qiáng)螺栓都是一次性也是因?yàn)檫@個(gè)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.

那么扭剪螺栓專用扳手廠家結(jié)合經(jīng)驗(yàn)所認(rèn)為，根據(jù)高強(qiáng)螺栓的施工工藝要求，高強(qiáng)螺栓的施工須先初擰后終擰，初擰高強(qiáng)螺栓需用沖擊型電動(dòng)扳手或扭矩可調(diào)電動(dòng)扳手；而終擰高強(qiáng)螺栓有嚴(yán)格的要求，終擰扭剪型高強(qiáng)螺栓須用扭剪型電動(dòng)扳手，終擰扭矩型高強(qiáng)螺栓須用扭矩型電動(dòng)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.

一般的扭剪型高強(qiáng)螺栓的初緊會(huì)選擇手動(dòng)扳手、沖擊電動(dòng)扳手、電動(dòng)扭矩扳手或者專門的初緊扳手，而終緊扭剪型高強(qiáng)螺栓就須選擇電動(dòng)扭剪扳手，而不能選擇扭矩扳手。（因?yàn)榻K緊的時(shí)候須要把梅花頭打斷，只有扭剪扳手有這個(gè)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.)

終擰緊固時(shí)應(yīng)注意，待梅花頭全部套入套筒后，才能按下電動(dòng)扳手開(kāi)關(guān)，若內(nèi)套筒只套入梅花頭尺寸的1/3～1/2長(zhǎng)度時(shí)按下電動(dòng)扳手開(kāi)關(guān)，將會(huì)造成梅花頭打滑，并且影響套筒的使用壽命。緊固時(shí)，終擰電動(dòng)扳手應(yīng)和構(gòu)件摩擦面保持垂直，扳手傾斜是很容易導(dǎo)致螺栓尾部梅花頭打滑，并易卡殼。

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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