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.

電動扭剪扳手的產(chǎn)品名稱和型號不同，適用范圍也不同，這里介紹電動扭剪扳手僅供參考。

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.

定扭矩電動扭剪扳手是一種能自動控制扭矩的電動扳手，適用于橋梁結(jié)構(gòu)、大型鋼塔、鋼結(jié)構(gòu)廠房、冶金設(shè)備框架、大型吊車架、礦山鋼架等需要用高強(qiáng)度螺栓連接的工程，以及大型柴油機(jī)、發(fā)電設(shè)備、化工設(shè)備，需要恒定夾緊力的螺栓也可以用固定扭矩扳手緊固。

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.

特別是在現(xiàn)代橋梁建設(shè)中，電動扭剪扳手是用螺栓焊接梁代替鉚接焊接梁的有效工具，這對簡化現(xiàn)場安裝工藝，降低橋梁建設(shè)成本，減輕勞動強(qiáng)度，從而加快橋梁建設(shè)具有重要意義，電動扭剪扳手的扭矩由電氣裝置控制，這種電動扳手具有功耗低、噪音小、調(diào)節(jié)靈活、自動停止、扭矩穩(wěn)定等優(yōu)點(diǎn)。

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.

我國自行設(shè)計(jì)制造的120kgf·m定扭矩電動扳手是一種靜扭矩結(jié)構(gòu)的扳手，可作為高強(qiáng)度螺栓的擰緊工具，即將開始時(shí)已經(jīng)擰緊的螺栓再次擰緊規(guī)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.

電動扭剪扳手是一種用于裝卸螺紋接頭的手持式電動工具，廣泛應(yīng)用于汽車、拖拉機(jī)、電機(jī)、動力機(jī)械、閥門、水泵、紡織機(jī)械等制造業(yè)的裝配工作，在化工、水泥預(yù)制件、塑料成型等作業(yè)中，用于生產(chǎn)過程中真空罐、反應(yīng)釜、水泥模板、螺紋塑料件的脫模，也可用于鐵路、橋梁、建筑等工程中水泥軌枕、桁架接頭、角鋼腳手架等結(jié)構(gòu)的安裝、檢修和更換。

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.

當(dāng)螺母端面與工件端面接觸時(shí)，阻力矩急劇上升，旋轉(zhuǎn)的螺旋槽使帶主動沖擊塊的滾珠克服摩擦力和工作彈簧的壓力向后運(yùn)動，使主動沖擊塊和從動沖擊塊的齒脫開，此時(shí)，從動沖擊塊不移動，但主動沖擊塊繼續(xù)向后移動，轉(zhuǎn)動從動沖擊塊的齒后，主動沖擊塊由于工作彈簧的作用瞬間向前運(yùn)動，并產(chǎn)生沿螺旋槽的角加速度，主動沖擊塊沖擊從動沖擊塊，兩齒相碰，然后螺旋槽使球體和主動沖擊塊向后運(yùn)動脫離，這樣就產(chǎn)生了反復(fù)的碰撞，獲得了擰緊螺母所需的沖擊力矩。

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.".

如果電源開關(guān)連接到反向位置，螺母可以擰出，雙絕緣單相串勵電動扭剪扳手在操作手柄上裝有兩個(gè)開關(guān)，一個(gè)是工作開關(guān)，用來控制啟動和停止;另一個(gè)是專門為改變電樞正反轉(zhuǎn)而設(shè)置的，兩個(gè)開關(guān)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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