Everyone has used a torque wrench. When it is used, it will make a click to indicate that it has reached your required torque value. Let's take a look at the internal structure of the torque wrench:

扭矩扳手所發出的“卡塔”是由本身內部的扭矩釋放結構產生的，其結構分為壓力彈簧、扭矩釋放關節、扭矩頂桿三結構所組成。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，會產生瞬間脫節的效應。在產生脫節效應的瞬間發出關節敲擊，扳手金屬外殼所發出的“卡塔”聲。

The "jam" of torque wrench is produced by its internal torque release structure, which is composed of pressure spring, torque release joint and torque ejector. First, set the required torque value on the torque wrench (the spring sleeve presses the torque release joint on the top rod), lock the torque wrench and start to tighten the bolt. When the bolt reaches the torque value (when the applied torque is greater than the spring pressure), it will produce the effect of instantaneous disconnection. At the moment of disjointed effect, the joint knocks and the metal shell of the wrench makes a "Kata" sound.

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）。

So as to confirm the reminder effect of reaching the torque value (in fact, it's the same principle that our arm joint is bent at 15 degrees and placed in the iron pipe, and will touch the steel pipe immediately after straightening).

扭力扳手也叫扭矩扳手，力矩就是力和距離的乘積，在緊固螺絲螺栓螺母等螺紋緊固件時需要控制施加的力矩大小，以保證螺紋緊固且不于因力矩過大破壞螺紋，所以用扭矩扳手來操作。

Torque wrench is also called torque wrench. Torque is the product of force and distance. When tightening screw, bolt, nut and other threaded fasteners, it is necessary to control the applied torque to ensure that the thread is tight and will not damage the thread due to excessive torque. Therefore, torque wrench is used to operate.

設定好一個需要的扭矩值上限，當施加的扭矩達到設定值時，扳手會發出“卡塔”聲響或者扳手連接處折彎一點角度，這就代表已經緊固不要再加力了。

First of all, set a required upper limit of torque value. When the applied torque reaches the set value, the wrench will make a "jam" sound or bend a little angle at the wrench joint, which means that it has been tightened and no more force is needed.