电动扭剪扳手是指拧紧和松开螺栓螺母的电动工具，是拧紧高强度螺栓的工具，用于钢结构桥梁、厂房、化工、发电设备的初拧和终拧，扭剪型高强度螺栓的初拧，以及对螺栓紧固件的扭矩或轴向力有严格要求的场合。
Electric torque wrench refers to an electric tool for tightening and loosening bolts and nuts, and is a tool for tightening high-strength bolts. It is used for the initial and final tightening of steel structure bridges, factories, chemical engineering, and power generation equipment, as well as for the initial tightening of torque shear type high-strength bolts, as well as occasions where there are strict requirements for the torque or axial force of bolt fasteners.
电动扭剪扳手的产品名称和型号不同，适用范围也不同，这里介绍电动扭剪扳手仅供参考。
The product names and models of electric torque wrench vary, and the scope of application varies. The introduction of electric torque wrench is for reference only.
定扭矩电动扭剪扳手是一种能自动控制扭矩的电动扳手，适用于桥梁结构、大型钢塔、钢结构厂房、冶金设备框架、大型吊车架、矿山钢架等需要用高强度螺栓连接的工程，以及大型柴油机、发电设备、化工设备，需要恒定夹紧力的螺栓也可以用固定扭矩扳手紧固。
The fixed torque electric torque shearing wrench is a type of electric wrench that can automatically control the torque. It is suitable for projects that require high-strength bolts for connection, such as bridge structures, large steel towers, steel structure factories, metallurgical equipment frames, large crane frames, mining steel frames, and large diesel engines, power generation equipment, and chemical equipment. Bolts that require constant clamping force can also be tightened using a fixed torque wrench.
特别是在现代桥梁建设中，电动扭剪扳手是用螺栓焊接梁代替铆接焊接梁的有效工具，这对简化现场安装工艺，降低桥梁建设成本，减轻劳动强度，从而加快桥梁建设具有重要意义，电动扭剪扳手的扭矩由电气装置控制，这种电动扳手具有功耗低、噪音小、调节灵活、自动停止、扭矩稳定等优点。
Especially in modern bridge construction, electric torsion shear wrenches are effective tools for replacing riveted and welded beams with bolted and welded beams. This is of great significance for simplifying on-site installation processes, reducing bridge construction costs, reducing labor intensity, and accelerating bridge construction. The torque of electric torsion shear wrenches is controlled by electrical devices. This electric wrench has the advantages of low power consumption, low noise, flexible adjustment, automatic stop, and stable torque.
我国自行设计制造的120kgf·m定扭矩电动扳手是一种静扭矩结构的扳手，可作为高强度螺栓的拧紧工具，即将开始时已经拧紧的螺栓再次拧紧规定扭矩。
The 120kgf · m constant torque electric wrench designed and manufactured by China is a type of wrench with a static torque structure, which can be used as a tightening tool for high-strength bolts. Bolts that have been tightened at the beginning will be tightened to the specified torque again.
电动扭剪扳手是一种用于装卸螺纹接头的手持式电动工具，广泛应用于汽车、拖拉机、电机、动力机械、阀门、水泵、纺织机械等制造业的装配工作，在化工、水泥预制件、塑料成型等作业中，用于生产过程中真空罐、反应釜、水泥模板、螺纹塑料件的脱模，也可用于铁路、桥梁、建筑等工程中水泥轨枕、桁架接头、角钢脚手架等结构的安装、检修和更换。
The electric torque wrench is a hand-held electric tool used for loading and unloading threaded joints, widely used in the assembly work of manufacturing industries such as automobiles, tractors, motors, power machinery, valves, water pumps, textile machinery, etc. In chemical engineering, cement prefabricated parts, plastic molding, and other operations, it is used for the demolding of vacuum tanks, reaction kettles, cement templates, and threaded plastic parts in the production process. It can also be used for railways, bridges Installation, maintenance, and replacement of cement sleepers, truss joints, angle steel scaffolds, and other structures in construction and other projects.
当螺母端面与工件端面接触时，阻力矩急剧上升，旋转的螺旋槽使带主动冲击块的滚珠克服摩擦力和工作弹簧的压力向后运动，使主动冲击块和从动冲击块的齿脱开，此时，从动冲击块不移动，但主动冲击块继续向后移动，转动从动冲击块的齿后，主动冲击块由于工作弹簧的作用瞬间向前运动，并产生沿螺旋槽的角加速度，主动冲击块冲击从动冲击块，两齿相碰，然后螺旋槽使球体和主动冲击块向后运动脱离，这样就产生了反复的碰撞，获得了拧紧螺母所需的冲击力矩。
When the end face of the nut contacts the end face of the workpiece, the resistance moment rises sharply. The rotating spiral groove causes the ball with the active impact block to move backward against the friction force and the pressure of the working spring, causing the teeth of the active impact block and the driven impact block to disengage. At this time, the driven impact block does not move, but the active impact block continues to move backward. After rotating the teeth of the driven impact block, the active impact block immediately moves forward due to the action of the working spring, "And produces an angular acceleration along the spiral groove, where the active impact block impacts the driven impact block, causing the two teeth to collide, and then the spiral groove causes the ball and the active impact block to move backward and disengage, resulting in repeated collisions and obtaining the impact torque required to tighten the nut.".
如果电源开关连接到反向位置，螺母可以拧出，双绝缘单相串励电动扭剪扳手在操作手柄上装有两个开关，一个是工作开关，用来控制启动和停止;另一个是专门为改变电枢正反转而设置的，两个开关不能反接。
If the power switch is connected to the reverse position, the nut can be screwed out. The double insulated single-phase series excitation electric torque wrench is equipped with two switches on the operating handle, one is a working switch, which is used to control the start and stop; The other is specially designed to change the forward and reverse rotation of the armature, and the two switches cannot be connected in reverse.
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