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Jiangsu qianfeng Fasteners CO.,LTD ADD:66,xinning road,jiang an economic developmentarea,rugao nantong,jiangsu,china Tel :0513-87956999 8795768 Fax:0513- 87957089 Mobile:13901429661（qiangkun,he） E-mail：postmaster@jsqianfeng.com maomao@jsqianfeng.com Http://www.jsqianfeng.com
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Fastener meaning |
| Update:
2011-6-15 |
Fasteners are a kind of mechanical parts, which are used for fastening connection and are widely used. In all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, instruments and supplies, and so on, you can see a wide variety of fasteners. It is characterized by a wide variety of specifications, the performance of different purposes, and standardization, serialization, universal species is also very high. So it is also the existing national standard of a class of fasteners called standard fasteners, or referred to as the standard parts.
The fastener comprises a bolt, a bolt, a screw, a nut, a washer, a pin and a bolt.
Fasteners, the market is also known as the standard parts. Is a kind of mechanical parts for fastening connection, the application is very extensive. The characteristics of the fastener: a wide variety of specifications, different performance, and standardization, serialization, universal degree of high. Therefore, it is also a national (industry) standards for a class of fasteners called standard fasteners, referred to as the standard parts.
The specifications, dimensions, tolerances, weight, performance, surface, marking each specific method of fastener products, specific requirements and acceptance inspection, marking and packaging items, are respectively specified in several countries (industry) standards, such as the British, German and american.
Fastener is the most widely used mechanical foundation. With Chinas accession to the WTO in 2001 and entered the ranks of international trade. Chinas fastener products are exported to many countries around the world, the worlds fastener products are constantly influx of the Chinese market. Fasteners as Chinas import and export of a large amount of products with international standards, to promote Chinese fastener enterprises to the world, to promote the fastener enterprises to fully participate in international cooperation and competition, all with significance and important strategic significance.
Fasteners are the two or more than two parts (or components) of the fastener connection as a whole when used in a class of mechanical parts. The market is also known as the standard parts.
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It usually includes the following 12 parts:
1 bolt: by the head and screw (with the outer screw cylinder) two parts of a type of fasteners, with the nut to fit, for fastening the connection of two parts with through holes. This type of connection is called bolt connection. If the nut is screwed down from the bolt, the two parts can be separated so that the bolt connection is detachable and connected.
2 stud: no head, a class of fasteners only at both ends with outer thread. One end of the connecting piece must be screwed into a part with inner screw holes, and the other end passes through the parts with through holes, and then the nut is screwed, and the two parts are connected to form a whole. This type of connection is called stud connection, which is also a detachable connection. The main used to be part of the larger thickness, the requirements of compact structure, or due to frequent demolition, it is not suitable for the use of bolt connection occasions.
3 screws: also by the head and screw two parts of a type of fasteners, can be divided into three categories: machine screws, screws and special purpose screws. The machine is mainly used for fastening a screw thread hole and fastening parts, connection between a part with a through hole, do not need to match the nut (this connection is called screw connection, also belongs to the detachable connection; also can be matched with a nut for two with a through hole between the parts are tightly connected.) The locking screw is mainly used for fixing the relative position between the two parts. Special purpose screws such as screw ring for hoisting parts.
4: nut with inner thread hole, the shape is flat six prism, there is a flat square cylindrical or flat cylindrical, with bolts, studs or machine screws for fastening connecting two parts, make it become a whole.
Special types of nuts
High strength self locking nut
A classification of self locking nut with high strength and strong reliability. Mainly is the introduction of European technology as the premise, used for road construction machinery, mining machinery, mechanical vibration equipment, the current domestic production of the products of the manufacturers have little.
Nylon self locking nut
Nylon lock nut is a new type of high vibration locking and fastening parts, can be applied to the temperature of -50 to 100 DEG C, all kinds of machinery and electrical products. At present, aerospace, aviation, automobile tanks, mining machinery, transport machinery, agricultural machinery, textile machinery, electrical products and various machinery of nylon lock nut surge in demand, this is because the anti vibration and anti loosing performance it is much higher than the other
Anti loosening device, but also several times higher than the vibration of the vibration times. At present, more than 80% of the accidents of mechanical equipment are caused by the loosening of the fastener, especially in the mining machinery.
The use of nylon self locking nut can eliminate the major accidents caused by the loosening of the fastener.
5 tapping screws: similar machine screws, but the thread on the screw for the special self tapping screws thread. For fastening two thin metal components, make it become a whole, members need to make holes, because the screw has high hardness, can be directly screwed into the member Kong Zhong, the response of the internal thread forming member. This type of connection is also a detachable connection.
6 wood screw machine screw is similar, but the thread on the screw for wood screws with the special rib, can be directly screwed into the wooden components (or parts), used to put a hole with the metal (or metal) with a wooden parts
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