How To Distinguish The Type Of Bolt
May 16, 2023
The bolt can be understood as a mechanical parts, which is a pillar -shaped tastener of the nut. A type of fastener consisting of the head and screw (cylindrical body with an external thread) needs to be coordinated with the nut to be used to fasten the two parts with pores with pores. This connection form is called a bolt connection. If you spin the nut from the bolt, you can separate the two parts, so the bolt connection belongs to the removable connection.
The bolt can be divided into: ordinary and hinge holes. Press the head shape: there are hexagonal heads, round heads, square heads, dignified heads and so on. The hexagonal head is the most commonly used. Generally, a deep head is used to require connection.
The bolt is a common saying of fasteners, but there are many private names. Some people call it into a screw, some call it into a bolt, and some people call it into a fastener. Some people will be called a certain standard part. Although there are so many calligraphy, the meaning is the same, all of which are bolts.
The bolt is a physics and mathematical principles that use the oblique rotation and friction of the object: the tools of the objects and parts of the utensils are gradually tightened. In daily life, in industrial manufacturing: The rice is widely used.
The scope of the bolt is: electronic products, mechanical products, digital products, power equipment, electromechanical mechanical products. Ship, vehicle, water conservancy engineering, and even chemical experiments are also useful to bolts. It is seen everywhere in life, such as precision bolts used on digital products. DVD, camera, glasses, clocks, electronics, etc. used miniature bolts; television, electrical products, musical instruments, furniture, etc. are used to use large bolts and nuts; Wait for size bolts. The bolt has important tasks in industry. As long as there is industry on the earth, the function of the bolt is always important.
The bolts are divided into many models and specifications, and there are many specifications of each bolt. How much will be different on the drawings, and the places they use are different. The level of bolt is based on relevant standards. The performance level of bolts is divided into more than 10 levels such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, including 8.8 and above bolts are low -carbon alloy steel or medium -carbon carbon steel Steel is also treated with heat (quenching and recovery), which is called high -intensity bolt, and the rest is called ordinary bolts. The bolt performance level is composed of two parts, which respectively represent the nominal tensile strength and flexion ratio of the bolt material.
The shape of the bolt will also be different in different applications. Take the depression bolts: Generally, the deep head is used to require the surface to be smooth and not protruding after the connection is required, because the imperial head can be screwed into the part. The round head can also be screwed into the part. The tightening force of the square head can be greater, but the size is large. In addition, in order to meet the needs of the locking after installation, there are holes on the head, and the pores of the pole. These holes can make the bolts not loose when vibrating. Some bolts do not have a threaded bolt, and it is called thin waist bolts. This bolt is conducive to the connection of the changes. There are special high -strength bolts on the steel structure, the head will be larger, and the size will change. In addition, there are special uses: T -shaped groove bolts, the most used on the machine tool fixture, special shape, and cutting off both sides of the head. Foot foot bolt: It has many shapes for machines and ground connections. U -shaped bolt, as mentioned above. etc. There is also a special thread for welding. One ends have a thread and one end. It can be welded on the parts and screwed the nut on the other side.
