Special Metal Fasten 12 Parts
Special metal fasteners are a kind of mechanical parts which are tightly connected and widely used. Fasteners, industry widely used, including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, mold, hydraulic, and so on, in all kinds of machinery, equipment, vehicles, ships, railways, Bridges, buildings, structures, tools, instruments, chemical industry, instrument and apparatus, such as the above, you can see all kinds of fasteners, is the most widely used mechanical components. It is characterized by a wide variety of specifications, different performance USES, and a high degree of standardization, serialization and generalization. As a result, some of the fasteners that already have national standards are called standard fasteners, or standard ones for short
It usually includes the following 12 parts:
1. Bolts: a type of fastener consisting of two parts of the head and the screw (a cylinder with an external screw), which needs to be fitted with the nut to tighten the connection of two parts with a pass hole. This form of connection is called bolted connection. If the nut is turned from the bolt, it is possible to separate the two parts, so the bolt connection is a removable connection.
2. Stud: no head, only one kind of fasteners with threads on both ends. One end of the connection, it must be screwing in part with internal thread hole, the other end through the parts with hole, and then screw nut, even if the two parts fastening connection into a whole. This form of connection, called a stud connection, is also a removable connection. It is mainly used for connecting parts with large thickness, compact structure, or because of frequent disassembly.
3. Screw: it is also a kind of fastener consisting of head and screw, which can be divided into three categories: machine screw, fastening screw and special purpose screw. Screw machine is mainly used for the parts of a set screw hole, and a fastening connection between parts with hole, don't need a nut with (this kind of connection form called screw connection, also belong to the detachable connection; It can also be fitted with nuts for fastening connections between two parts with a pass hole. The fastening screw is mainly used to fix the relative position between two parts. Special purpose screws such as lifting ring screws for lifting parts.
4. Nut: with internal thread hole, general is shown for the flat six Angle shape, also have a flat square shape or cylindrical, flat with screw bolt, stud, or machine, used for fastening the two parts, as a whole.
5. Self-tapping screw: similar to machine screw, but thread of screw thread is used for special self tapping screw. Used for fastening two thin metal components, make it as a whole, the component on the need to make holes in advance, because the screw has high hardness, can be directly screwing component hole, make component formed in response to the internal thread
6. Wood screw, is similar to the machine screw, the screw thread on the special wood screw with thread, can be directly screwing in wooden components (or parts), is used to put a metal (or non-metal) parts with hole with a wooden fastening components. This connection also belongs to the removable connection.
Gasket: a type of fastener shaped like a circular ring. In the bearing surface of the bolt, screw or nut and connection parts surface, plays an increasing connected parts contact surface area, reduce the pressure per unit area and protect connected parts surface is not damaged; Another type of elastic gasket can also prevent the nut from being loose.
8. Baffle: the action of preventing the movement of parts from the shaft or hole of a machine, device, or hole.
9. Pin: mainly used for the positioning of parts, some may be used for parts connection, fixed parts, transmission power or other fasteners.
10. Rivet: a fastener consisting of two parts of the head and screw rod, which is used to tighten the parts (or components) of the two connected holes, making it a whole. This form of connection is called rivet connection, or riveting. It is connected to an undetachable connection. Because to separate the two parts connected together, the rivet on the part must be destroyed.
11. Assembly and connection vice: assembly supply refers to the combination of fasteners, such as a machine screw (, autonomous screw or bolt) and flat washer (or spring washer, lock washer) combined supply; A pair of fasteners that supply a particular type of special bolt, nut, and gasket
12. Wire screw cover: a new type of thread connecting element is made of high strength and high precision and corrosion resistant diamond. The shape of spring is installed in a certain screw hole of the base body, and the internal surface is formed standard thread, which can obviously improve the thread connection strength and wear resistance when combined with the screw (bolt). Especially in aluminum, magnesium, cast iron, plastic and other low-strength materials. The lock type is to add a ring or a few laps to the common type. Xinxiang yongda industrial co., LTD is a professional manufacturer of steel wire spiral sets, suggested wire embedding a screw aluminum, magnesium, iron, glass, plastic and other low strength of screw thread of engineering materials, can form the standard M, MJ thread, with continuous strength, resistance to impact and abrasion loss function, and can disperse stress to protect matrix thread, greatly extend the service life of the matrix. At the same time, improve the force of the thread, the formation of the elastic connection, eliminates the internal and external thread pitch and tooth type half Angle error between, make the load evenly distributed on the thread, to protect the matrix thread is not damaged, prolong service life