定扭矩扳手一般就是可以設定扭矩值的電動扳手，也叫定扭矩電動扳手。電動扭矩扳手一般用來緊固大六角高強螺栓，使用時，先把扭矩調(diào)到需要規(guī)定的扭矩，然后緊固螺栓。

A fixed torque wrench is generally an electric wrench that can set a torque value, also known as a fixed torque electric wrench. Electric torque wrenches are generally used to tighten large hexagonal high-strength bolts. When using them, first adjust the torque to the required torque, and then tighten the bolts.

電動定扭扳手分為電流式和動態(tài)扭矩傳感器式兩種，由控制器和擰緊軸組成。電流式定扭扳手根據(jù)電機擰緊過程中電流值的變化來判斷扭力值，當達到預定扭力時，電機停止工作。動態(tài)扭矩傳感器式是在擰緊軸上安裝有傳感器，時刻監(jiān)測扭力值的變化，當達到預定扭力時，電機停止工作。

Electric torque wrenches are divided into two types: current type and dynamic torque sensor type, consisting of a controller and a tightening shaft. The current type fixed torque wrench determines the torque value based on the change in current value during the tightening process of the motor. When the predetermined torque is reached, the motor stops working. The dynamic torque sensor type is installed on the tightening shaft with a sensor to constantly monitor changes in torque value. When the predetermined torque is reached, the motor stops working.

電動扭矩扳手具有精度高（±2%）、故障率低、壽命長、可編程，可對扭力和角度控制、可多種扭力選擇的優(yōu)點。因為擰大扭矩螺栓會有反作用力，所以一般在大扭矩擰緊工件上都會設計反作用力臂，防 止操作人員出現(xiàn)事故。

Electric torque wrenches have the advantages of high precision (± 2%), low failure rate, long service life, programmability, controllable torque and angle, and multiple torque options. Due to the reaction force generated by tightening high torque bolts, reaction arms are generally designed on high torque tightened workpieces to prevent safety accidents for operators.

扭剪扳手主要是終緊扭剪型高強螺栓的，它的目的就是把扭剪型高強螺栓的梅花頭打斷即可。工作時將扳手頭對準螺栓頭，扣動開關即可開始工作，幾秒后，螺栓梅花頭將被扭斷，然后抽出扳手扣動扳機將梅花頭彈出，即結束工作。

The torsion wrench is mainly used for final tightening of torsion shear high-strength bolts, and its purpose is to break the plum blossom head of the torsion shear high-strength bolt. When working, align the wrench head with the bolt head, press the switch to start working. After a few seconds, the bolt ring head will be twisted and broken. Then, pull out the wrench and pull the trigger to eject the ring head, which ends the work.