沖擊扳手適用于普通螺栓，定扭矩扳手適用于高強度螺栓(大陸角型)的初緊與終緊；扭剪扳手適用于高強度螺栓(梅花型)的終緊。

Impact wrenches are suitable for ordinary bolts, while fixed torque wrenches are suitable for the initial and final tightening of high-strength bolts (continental angle type); The torsion wrench is suitable for final tightening of high-strength bolts (plum blossom type).

注：沖擊電動扳手的工作效率較高，一般每分鐘沖擊次數(shù)1000次以上。梅花型的高強螺栓的初緊可以用定扭矩電動扳手或沖擊扳手，而一般來說大陸角型高強螺栓的施工工藝對初緊的扭矩精度要求較高，需要用相應扭矩的定扭矩扳手來施工。

Note: The working efficiency of impact electric wrenches is relatively high, generally with more than 1000 impacts per minute. The initial tightening of plum blossom shaped high-strength bolts can be achieved using a fixed torque electric wrench or an impact wrench, while in general, the construction process of continental angle high-strength bolts requires high precision in the initial tightening torque and requires the use of a corresponding torque fixed torque wrench for construction.

不需要校驗。

No verification required.

不像定扭矩電動扳手，需要校驗扭矩的精度，是否準確，扭剪型電動扳手只是將扭剪型高強螺栓的梅花頭打斷，既是完成了它的工作目的。

Unlike fixed torque electric wrenches, which require verifying the accuracy of torque, torsion shear electric wrenches only break the plum blossom head of torsion shear high-strength bolts, completing their work purpose.

因為扭剪型電動扳手在使用時，將扭剪型電動扳手頭對準扭剪型高強螺栓頭，扣動開關即可開始工作，幾秒后，螺栓梅花頭將被扭斷，抽出扳手扣動扳機將梅花頭彈出，即結(jié)束工作。電動扳手主要應用于鋼結(jié)構(gòu)安裝行業(yè)，專門安裝鋼結(jié)構(gòu)高強螺栓，高強度螺栓是用來連接鋼結(jié)構(gòu)接點的，通常是用螺栓群的方式出現(xiàn)。高強螺栓可分為扭剪型和大六角型兩種，國標扭剪型高強螺栓為M16、M20、M22、M24四種，現(xiàn)在也有非國標的M27、M30兩種；國標大六角高強螺栓為M16、M20、M22、M24、M27、M30等幾種。一般的對于高強螺栓的緊固都要先初緊再終緊，而且每步都需要有嚴格的扭矩要求。扭剪型高強螺栓的初緊可使用沖擊電動扳手或定扭矩扳手,而終緊必須使用扭剪扳手;大六角高強螺栓的初緊和終緊都必須使用定扭矩扳手.故各種電動扳手就是為各種緊固需要而來的。

Because when using the torsion shear type electric wrench, align the head of the torsion shear type electric wrench with the high-strength bolt head, press the switch to start working. After a few seconds, the bolt plum blossom head will be twisted and broken. Pull out the wrench and pull the trigger to pop out the plum blossom head, which ends the work. Electric wrenches are mainly used in the steel structure installation industry, specifically for installing high-strength bolts for steel structures. High strength bolts are used to connect steel structure joints, usually in the form of bolt groups. High strength bolts can be divided into two types: torsion shear type and large hexagonal type. The national standard torsion shear type high strength bolts are M16, M20, M22, and M24, and now there are also non national standard M27 and M30 types; The national standard large hexagonal high-strength bolts include several types such as M16, M20, M22, M24, M27, M30, etc. Generally, the tightening of high-strength bolts requires initial tightening before final tightening, and each step requires strict torque requirements. The initial tightening of torsion shear high-strength bolts can be achieved using an impact electric wrench or a fixed torque wrench, while the final tightening must be achieved using a torsion shear wrench; The initial and final tightening of large hexagonal high-strength bolts must use a fixed torque wrench. Therefore, various electric wrenches are designed for various tightening needs.

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