What are the fasteners produced by cold heading machines
Source：http://www.rnbe.cn Author：冷鐓機 Time：2014/8/21 Click：
Fasteners are a general term for a type of mechanical component used to securely connect two or more parts (or components) into a single unit. Produce different types of fastening equipment based on the different uses of cold heading machines.
The types of fasteners produced by cold heading machines include bolts, bolts, screws, nuts, self tapping screws, and other products.
1. Bolt: A type of fastener consisting of a head and a screw (cylindrical body with external threads). Used to fasten and connect two parts with through holes. This type of connection is called bolted connection. If the nut is unscrewed from the bolt, it can separate these two parts, so the bolt connection is a detachable connection. One end must be screwed into the part with an internal threaded hole,
2. Stud: A type of fastener that only has external threads on both ends without a head. When connected. The other end passes through the part with a through-hole, and then the nut is screwed on, even if these two parts are tightly connected as a whole. This type of connection is called a bolted connection and is also a detachable connection. Mainly used in places where one of the connected parts has a large thickness, requires a compact structure, or is not suitable for bolted connections due to frequent disassembly. According to their purposes, they can be divided into three categories: machine screws, set screws, and special-purpose screws. Machine screws are mainly used for a part that tightens a threaded hole,
3. Screw: It is also a type of fastener consisting of a head and a screw. The fastening connection between a part with a through-hole does not require a nut to fit (this type of connection is called a screw connection, which is also a detachable connection; it can also be used with a nut to fasten the connection between two parts with a through-hole. The fastening screw is mainly used to fix the relative position between two parts. Special purpose screws such as lifting ring screws are used for lifting parts. The shape is generally flat hexagonal column,
4. Nut: with internal threaded hole. There are also flat square or cylindrical shapes, which are used in conjunction with bolts, screws, or machine screws to fasten and connect two parts into a single unit. But the thread on the screw is a dedicated self tapping screw thread. Used for fastening and connecting two thin metal components,
5. Self tapping screws: Similar to machine screws. To make it a whole, small holes need to be made on the component in advance. Due to the high hardness of these screws, they can be directly screwed into the holes of the component to form corresponding internal threads. This type of connection is also a detachable connection. But the threads on the screw are special wood screws with ribbed patterns,
6. Wooden screws: Similar to machine screws. Wood screws produced by cold heading machines can be directly screwed into wooden components (or parts) to securely connect a metal (or non-metal) part with a through-hole to a wooden component. This type of connection also belongs to assembly connections. Increasing the contact surface area of the connected parts,
7. Gasket: A type of fastener with a flat circular shape. Placed between the support surface of bolts, screws or nuts and the outer surface of the connecting parts. The function of reducing unit area pressure and maintaining the appearance of connected parts from damage; Another type of elastic washer can also prevent the nut from loosening. Plays a role in preventing parts on the shaft or hole from moving left and right.
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