Electric wrench refers to an electric tool for tightening and loosening bolts and nuts. It is a tool for tightening high-strength bolts. It is used for the initial and final tightening of large hexagon head high-strength bolts for the installation of steel structure bridges, plant buildings, chemical industry and power generation equipment, and the initial tightening of torsional shear high-strength bolts, as well as occasions with strict requirements on the torque or axial force of bolt fasteners.

电动板手的产品名称型号不同，用途使用范围也不同。这里介绍定扭矩电动板手，供使用参考。

The product name and model of electric wrench are different, and the application range is also different. This paper introduces the constant torque electric wrench for reference.

定扭矩电动板手是一种能自动控制扭矩的电动板手。它适用于需要用高强度螺栓连接的桥梁结构、大型钢塔、钢结构厂房、冶金设备的构架、大型起重机架、矿井钢架等工程中及大型柴油机、发电设备、化工设备中，要求恒定的夹紧力连接的螺栓也可用定扭矩板手坚固。

Constant torque electric wrench is an electric wrench that can automatically control torque. It is applicable to bridge structures, large steel towers, steel structure plants, frames of metallurgical equipment, large crane frames, mine steel frames and other projects that need to be connected with high-strength bolts, as well as large diesel engines, power generation equipment and chemical equipment. Bolts requiring constant clamping force can also be firmly connected with fixed torque wrench.

特别是在现代桥梁建设中，定扭矩电动板手是实现以“栓焊梁”代替“铆焊梁”的有效工具。这对简化工地安装工序、降低建桥成本、减轻劳动强度，从而加速桥梁建设具有较大的意义。

Especially in modern bridge construction, fixed torque electric wrench is an effective tool to replace "riveted beam" with "bolted beam". This is of great significance to simplify the site installation process, reduce the bridge construction cost, reduce the labor intensity, and accelerate the bridge construction.

定转矩电动扳手的转矩以电气装置来进行控制。这种电动扳手具有耗电量少、噪声小、调节灵活、能自动停机、转矩稳定等优点。

The torque of constant torque electric wrench is controlled by electrical device. The electric wrench has the advantages of low power consumption, low noise, flexible adjustment, automatic shutdown, stable torque and so on.

电动扳手是装卸螺纹联接件的手持式电动工具，广泛应用于汽车、拖拉机、电机电器、动力机械、阀门、水泵、纺织机械等制造业的装配工作中，在化工、水泥预制件、塑料成型等作业中则用于生产流程中装拆真空罐、反应釜和水泥模板、带螺纹塑料件的脱模工作；也可用在铁道、桥梁、建筑等工程中作水泥轨枕、桁架节点、角钢脚手架等结构的安装、检修和拆换工作。

Electric wrench is a hand-held electric tool for loading and unloading threaded connectors. It is widely used in the assembly of automobiles, tractors, motors and electrical appliances, power machinery, valves, water pumps, textile machinery and other manufacturing industries. In chemical industry, cement prefabricated parts, plastic molding and other operations, it is used for the assembly and disassembly of vacuum tanks, reactors and cement templates in the production process Demoulding of threaded plastic parts; It can also be used for the installation, maintenance and replacement of cement sleepers, truss joints, angle steel scaffolds and other structures in railways, bridges, buildings and other projects.