冲击扳手适用于普通螺栓，定扭矩扳手适用于高强度螺栓(大陆角型)的初紧与终紧；扭剪扳手适用于高强度螺栓(梅花型)的终紧。

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：冲击电动扳手的工作效率较高，一般每分钟冲击次数1000次以上。梅花型的高强螺栓的初紧可以用定扭矩电动扳手或冲击扳手，而一般来说大陆角型高强螺栓的施工工艺对初紧的扭矩精度要求较高，需要用相应扭矩的定扭矩扳手来施工。

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.

不需要校验。

No verification required.

不像定扭矩电动扳手，需要校验扭矩的精度，是否准确，扭剪型电动扳手只是将扭剪型高强螺栓的梅花头打断，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.

因为扭剪型电动扳手在使用时，将扭剪型电动扳手头对准扭剪型高强螺栓头，扣动开关即可开始工作，几秒后，螺栓梅花头将被扭断，抽出扳手扣动扳机将梅花头弹出，即结束工作。电动扳手主要应用于钢结构安装行业，专门安装钢结构高强螺栓，高强度螺栓是用来连接钢结构接点的，通常是用螺栓群的方式出现。高强螺栓可分为扭剪型和大六角型两种，国标扭剪型高强螺栓为M16、M20、M22、M24四种，现在也有非国标的M27、M30两种；国标大六角高强螺栓为M16、M20、M22、M24、M27、M30等几种。一般的对于高强螺栓的紧固都要先初紧再终紧，而且每步都需要有严格的扭矩要求。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,而终紧必须使用扭剪扳手;大六角高强螺栓的初紧和终紧都必须使用定扭矩扳手.故各种电动扳手就是为各种紧固需要而来的。

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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