Wrench is a tool used to install and disassemble machine parts. It is usually made of alloy structural steel. It is divided into many types. It is loved by the majority of consumers because of its performance and cost performance. It is true that using a wrench can solve the problem of insufficient strength when people disassemble parts, but it will have more or less problems in the process of use. The following list lists the problems that should be paid attention to when using a wrench. I hope you will pay more attention to it.

操作者在拉扳手時用力一定要均勻，只有溫柔對待扳手，那么它也就會更快速地打開零件。如果用力不均會造成麻煩，因為突然間猛拉扳手會產(chǎn)生沖量，而在停止用力的瞬間，或許釘或螺栓已經(jīng)扭過頭，這時更會影響使用效率。

When the operator pulls the wrench, the force must be uniform. Only by treating the wrench gently, it will open the parts more quickly. If the force is uneven, it will cause trouble, because suddenly pulling the wrench will produce impulse. At the moment of stopping the force, perhaps the nail or bolt has been turned too far, which will affect the use efficiency.

在操作扳手前，應(yīng)該將周圍的污染物清理干凈，否則會影響到的扭矩值。而且零件上如果粘上污染物，那么就更不可能會有正確的扭矩值。

Before operating the wrench, the surrounding pollutants should be cleaned up, otherwise the torque value will be affected. Moreover, if pollutants are stuck on the parts, it is even more impossible to have the correct torque value.

使用扳手都會出現(xiàn)摩擦因素，那么這個摩擦因素有兩面性，一方面它可以使得零件更加緊密結(jié)合在一起；另一方面可能會帶來操作上的錯誤，用手來擰緊聯(lián)接的力只有百分之十左右是用于拉緊方面的，而百分之四十是用來克服螺栓頭和零件之間的摩擦，沿螺栓和螺孔的配偶螺紋表面也會產(chǎn)生附加的摩擦。所以在擰緊螺栓時，應(yīng)把所有這些摩擦因素都考慮進去。

The use of wrenches will have friction factors, so this friction factor has two sides. On the one hand, it can make the parts more closely combined; On the other hand, it may lead to operational errors. Only about 10% of the force to tighten the connection by hand is used for tensioning, while 40% is used to overcome the friction between the bolt head and parts. Additional friction will also occur along the mating thread surface of the bolt and screw hole. Therefore, all these friction factors should be taken into account when tightening bolts.

當遇到需要擰緊有損傷的螺母時，操作者要注意通過損傷部位的附加扭矩需要多少，然后把附加扭矩加到的扭矩值上。

When the damaged nut needs to be tightened, the operator should pay attention to the additional torque required through the damaged part, and then add the additional torque to the recommended torque value.

電動扳手沒力原因可能是：1、電機損壞；2：電池沒電。

The reasons for the lack of force of the electric wrench may be: 1. The motor is damaged; 2: The battery is dead.

電動扳手主要應(yīng)用于鋼結(jié)構(gòu)安裝行業(yè)，專門安裝鋼結(jié)構(gòu)高強螺栓，高強度螺栓是用來連接鋼結(jié)構(gòu)接點的，通常是用螺栓群的方式出現(xiàn)。高強螺栓可分為扭剪型和大六角型兩種，國標扭剪型高強螺栓為M16、M20、M22、M24四種，非國標的M27、M30兩種；國標大六角高強螺栓為M16、M20、M22、M24、M27、M30等幾種。一般的對于高強螺栓的緊固都要先初緊再終緊，而且每步都需要有嚴格的扭矩要求。大六角高強螺栓的初緊和終緊都使用定扭矩扳手.故各種電動扳手就是為各種緊固需要而來的。

Electric wrenches are mainly used in the steel structure installation industry. They are specially used to install high-strength bolts of steel structure. High-strength bolts are used to connect steel structure joints, usually in the form of bolt groups. High strength bolts can be divided into torsion shear type and large hexagon type. There are four kinds of national standard torsion shear high strength bolts: M16, M20, M22 and M24, and two kinds of non-national standard M27 and M30; The national standard large hexagon high-strength bolts are M16, M20, M22, M24, M27, M30, etc. Generally, the tightening of high-strength bolts should be first tightened and then finally tightened, and strict torque requirements are required in each step. Constant torque wrenches are used for initial and final tightening of large hexagon high strength bolts Therefore, all kinds of electric wrenches are for various fastening needs.