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.

電動板手的產品名稱型號不同，用途使用范圍也不同。這里介紹定扭矩電動板手，供使用參考。

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.

定扭矩電動板手是一種能自動控制扭矩的電動板手。它適用于需要用高強度螺栓連接的橋梁結構、大型鋼塔、鋼結構廠房、冶金設備的構架、大型起重機架、礦井鋼架等工程中及大型柴油機、發(fā)電設備、化工設備中，要求恒定的夾緊力連接的螺栓也可用定扭矩板手堅固。

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.

特別是在現(xiàn)代橋梁建設中，定扭矩電動板手是實現(xiàn)以“栓焊梁”代替“鉚焊梁”的有效工具。這對簡化工地安裝工序、降低建橋成本、減輕勞動強度，從而加速橋梁建設具有較大的意義。

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.

定轉矩電動扳手的轉矩以電氣裝置來進行控制。這種電動扳手具有耗電量少、噪聲小、調節(jié)靈活、能自動停機、轉矩穩(wěn)定等優(yōu)點。

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.

電動扳手是裝卸螺紋聯(lián)接件的手持式電動工具，廣泛應用于汽車、拖拉機、電機電器、動力機械、閥門、水泵、紡織機械等制造業(yè)的裝配工作中，在化工、水泥預制件、塑料成型等作業(yè)中則用于生產流程中裝拆真空罐、反應釜和水泥模板、帶螺紋塑料件的脫模工作；也可用在鐵道、橋梁、建筑等工程中作水泥軌枕、桁架節(jié)點、角鋼腳手架等結構的安裝、檢修和拆換工作。

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.