With the progress of science and technology and the rapid development of the industry, the use and requirements of torque wrench are becoming more and more common and accurate. From the traditional torque wrench, set ratchet torque wrench, digital display torque wrench and preset torque wrench have gradually evolved. Although their categories are different, their principles are roughly the same. Next, let's talk about the principle of torque wrench.

扭力扳手原理

Principle of torque wrench

扭力扳手發(fā)出卡塔聲音的原理很簡單，扭矩扳手在發(fā)出“卡塔”聲后是提示已達到你要求的扭矩值了；扭矩扳手所發(fā)出的“卡塔”是由本身內(nèi)部的扭矩釋放結(jié)構(gòu)產(chǎn)生的，其結(jié)構(gòu)分為壓力彈簧、扭矩釋放關節(jié)、扭矩頂桿三結(jié)構(gòu)所組成。在扭矩扳手上設定所需扭矩值（由彈簧套在頂桿上向扭矩釋放關節(jié)施壓），鎖定扭矩扳手，開始擰緊螺栓。當螺栓達到扭矩值（當使用扭力大于彈簧的壓力）后，會產(chǎn)生瞬間脫節(jié)的效應。在產(chǎn)生脫節(jié)效應的瞬間發(fā)出關節(jié)敲擊，扳手金屬外殼所發(fā)出的“卡塔”聲。由此來確認達到扭矩值的提醒作用（其實就象我們手臂關節(jié)成15度彎曲放在鐵管里瞬間申直后會碰到鋼管的原理一樣）。

The principle that the torque wrench makes a click sound is very simple. After the torque wrench makes a "click" sound, it indicates that the torque value you require has been reached; The "lata" emitted by the torque wrench is generated by its own internal torque release structure, which is divided into three structures: pressure spring, torque release joint and torque ejector rod. First, set the required torque value on the torque wrench (press the torque release joint by the spring sleeve on the ejector rod), lock the torque wrench and start tightening the bolts. When the bolt reaches the torque value (when the torque used is greater than the pressure of the spring), it will produce the effect of instantaneous disconnection. At the moment of disjointed effect, the joint knock and the "Kata" sound emitted by the metal shell of the wrench are sent out. This is to confirm the reminder effect of reaching the torque value (in fact, it is the same as the principle that our arm joints will touch the steel pipe after being bent at 15 degrees and placed in the iron pipe for instant straightening).

扭力扳手的使用要點

Key points of torque wrench

1、按所需定力數(shù)值，選擇相應的并經(jīng)校驗合格的定扭矩扳手，不準使用沒有經(jīng)過校驗的定扭矩扳手；

1. Select the corresponding constant torque wrench that has passed the calibration according to the required constant torque value, and it is not allowed to use the constant torque wrench that has not been calibrated;

2、要用平衡、緩慢的力扭轉(zhuǎn)扳手，不能急扭，手握住定扭矩扳手手柄中間點，垂直于扳手中 心線拉動手柄，直到達到所要求的力矩為止，不允許隨意手握根部和端點；

2. A balanced and slow torque wrench shall be used instead of quick torque. Hold the middle point of the handle of the constant torque wrench and pull the handle perpendicular to the center line of the wrench until the required torque is reached. It is not allowed to hold the root and end points at will;

3、不要施加大于定扭矩扳手額定值的扭矩，不準用定扭矩扳手拆卸螺栓或螺母，定扭矩扳手只能順時針轉(zhuǎn)動；

3. Do not apply torque greater than the rated value of the constant torque wrench. Do not use the constant torque wrench to remove bolts or nuts. The constant torque wrench can only rotate clockwise;

4、用定扭矩扳手擰緊螺栓時，應盡可能不使用轉(zhuǎn)接器，非用不可時，必 須遵守下列要求：轉(zhuǎn)接器有各種不同形狀時，可合理選用；為減少擰緊力矩誤差，轉(zhuǎn)接器長度應小于定扭矩扳手長度；連接轉(zhuǎn)接器時，其中 心線應和扳手中 心線成一條直線，若需要也可使用軸線偏移的轉(zhuǎn)接器，但大不超過15°角。

4. When tightening bolts with a constant torque wrench, the adapter shall not be used as far as possible. When it is not necessary to use, the following requirements must be observed: when the adapter has various shapes, it can be reasonably selected; In order to reduce the error of tightening torque, the length of adapter shall be less than that of constant torque wrench; When connecting the adapter, the center line shall be in line with the center line of the wrench. If necessary, the adapter with axis offset can also be used, but the angle shall not exceed 15 °.

5、不允許將定扭矩扳手當做普通扳手使用，如用來擰松螺母或螺栓等；

5. It is not allowed to use the constant torque wrench as an ordinary wrench, such as to loosen nuts or bolts;

6、右扭矩定扭矩扳手不能左旋，而左扭矩定扭矩扳手也不能右旋；

6. The right torque constant torque wrench cannot rotate left, and the left torque constant torque wrench cannot rotate right;

7、不能用鍍鉻的定扭矩扳手和轉(zhuǎn)接扳手接觸鈦及合金制的螺栓或產(chǎn)品結(jié)構(gòu)；

7. Do not use chrome plated constant torque wrench and adapter wrench to contact titanium and alloy bolts or product structure;

8、定扭矩扳手施加的扭矩不允許超過定扭矩扳手的額定扭矩值。

8. The torque applied by the constant torque wrench shall not exceed the rated torque value of the constant torque wrench.

扭力扳手原理及其使用要點就給大家介紹到這里了，大家在使用大規(guī)格扭矩扳手時，可外加接長套桿以便操作省力，若是長時間不使用，就應該把調(diào)節(jié)標尺刻線退扭矩小數(shù)值處。

The principle of torque wrench and its key points of use are introduced here. When using large-size torque wrench, you can add an extension sleeve rod to save labor in operation. If you don't use it for a long time, you should return the scribed line of the adjustment scale to the small value of torque.