高强螺栓和普通螺栓外观区别

Appearance difference between high-strength bolt and ordinary bolt

1.普通螺栓可重复使用,高强度螺栓不可重复使用。 2.材料上:高强度螺栓一般由高强钢材制成(45号钢(8.8s),20MmTiB(10.9S),是预应力螺栓,摩擦型用扭矩扳手施加规定预应力,承压型拧掉梅花头。普通螺栓一般由普通钢材(Q235)制成,只需拧紧即可。 3.强度等级上:普通螺栓一般为4.4级、4.8级、5.6级和8.8级。高强度螺栓一般为8.8级和10.9级,其中10.9级居多。 4.普通螺栓的螺孔不一定比高强度螺栓大。实际上,普通螺栓螺孔比较小。

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.

扳手是用于安装拆卸机器零件的工具，通常用合金结构钢制造，分为很多种类型，它以其性能和性价比从而受到了广大消费者的喜爱。的确使用扳手可以解决人们拆零件时力量不足的问题，但是它在使用过程中会出现或多或少的问题，下面小编列举一下使用扳手时应注意的问题，望大家多加重视。

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.

操作者在拉扳手时用力一定要均匀，只有温柔对待扳手，那么它也就会更快速地打开零件。如果用力不均会造成麻烦，因为突然间猛拉扳手会产生冲量，而在停止用力的瞬间，或许钉或螺栓已经扭过头，这时更会影响使用效率。

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，应该将周围的污染物清理干净，否则会影响到准确的扭矩值。而且零件上如果粘上污染物，那么就更不可能会有正确的扭矩值。

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.

使用扳手都会出现摩擦因素，那么这个摩擦因素有两面性，一方面它可以使得零件更加紧密结合在一起；另一方面可能会带来操作上的错误，用手来拧紧联接的力只有百分之十左右是用于拉紧方面的，而百分之四十是用来克服螺栓头和零件之间的摩擦，沿螺栓和螺孔的配偶螺纹表面也会产生附加的摩擦。所以在拧紧螺栓时，应把所有这些摩擦因素都考虑进去。

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.

当遇到需要拧紧有损伤的螺母时，操作者要注意通过损伤部位的附加扭矩需要多少，然后把附加扭矩加到推荐的扭矩值上。

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.