高強螺栓和普通螺栓外觀區(qū)別

Appearance difference between high-strength bolt and ordinary bolt

1.普通螺栓可重復使用,高強度螺栓不可重復使用。 2.材料上:高強度螺栓一般由高強鋼材制成(45號鋼(8.8s),20MmTiB(10.9S),是預應力螺栓,摩擦型用扭矩扳手施加規(guī)定預應力,承壓型擰掉梅花頭。普通螺栓一般由普通鋼材(Q235)制成,只需擰緊即可。 3.強度等級上:普通螺栓一般為4.4級、4.8級、5.6級和8.8級。高強度螺栓一般為8.8級和10.9級,其中10.9級居多。 4.普通螺栓的螺孔不一定比高強度螺栓大。實際上,普通螺栓螺孔比較小。

1. ordinary bolts can be reused, while high-strength bolts cannot be reused. 2. materials: high strength bolts are generally made of high-strength steel (No. 45 steel (8.8s), 20mmtib (10.9s). They are prestressed bolts. For friction type, the specified prestress is applied with a torque wrench, and for pressure type, the Torx head is screwed off. Ordinary bolts are generally made of ordinary steel (Q235) and only need to be tightened. 3. strength grade: ordinary bolts are generally grade 4.4, 4.8, 5.6 and 8.8. High strength bolts are generally grade 8.8 and grade 10.9, most of which are grade 10.9. 4. the screw hole of ordinary bolt is not necessarily larger than that of high-strength bolt. In fact, common bolt holes are relatively small.

扳手是用于安裝拆卸機器零件的工具，通常用合金結構鋼制造，分為很多種類型，它以其性能和性價比從而受到了廣大消費者的喜愛。的確使用扳手可以人們拆零件時力量不足的問題，但是它在使用過程中會出現(xiàn)或多或少的問題，下面小編列舉一下使用扳手時應注意的問題，望大家多加重視。

Wrench is a tool used to install and disassemble machine parts. It is usually made of alloy structural steel. It can be 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 them.

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生沖量，而在停止用力的瞬間，或許釘或螺栓已經扭過頭，這時更會影響使用效率。

The operator must exert even force when pulling the wrench. If he treats 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, and at the moment of stopping the force, the nail or bolt may have been turned too far, which will further affect the use efficiency.

在操作扳手前，應該將周圍的污染物清理干凈，否則會影響到準確的扭矩值。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 accurate torque value will be affected. Moreover, if pollutants are adhered to 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生附加的摩擦。所以在擰緊螺栓時，應把所有這些摩擦因素都考慮進去。

The use of wrenches will cause 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 used 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 the 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 shall pay attention to the additional torque required to pass through the damaged part, and then add the additional torque to the recommended torque value.