What are the fasteners produced by cold heading machines?

fastenerIt is a general term for a type of mechanical parts used to tightly connect 2 or more parts (or components) into one whole. Depending on the purpose ofCold heading machineProduction of different types of fastening equipment.

The types of fasteners produced by cold heading machines include bolts, studs, screws, nuts, self-tapping screws and other products.

1. Bolt: A type of fastener consisting of two parts: the head and the screw (cylindrical with external threads). It is used to fasten and connect two parts with through holes. This connection form is called a bolt connection. If the nut is screwed down from the bolt, the two parts can be separated, so the bolt connection is a removable connection. One end must be screwed into the part with internal threaded holes.

2. Studs: A type of fastener without a head with only two external threads. When connecting, the other end passes through a part with a through hole, and then screws on a nut. Even if these two parts are tightly connected into a whole. This connection form is called a stud connection, and it is also a removable connection. It is mainly used in places where one of the connected parts is thick, requires a compact structure, or is not suitable for bolt connection due to frequent disassembly. According to its purpose, it can be divided into three categories: machine screws, tightening screws and special purpose screws. Machine screws are mainly used for parts that tighten thread holes.

3. Screws: It is also a type of fastener composed of two parts of the head and screw. The fastening connection with a part with a through hole does not require a nut fit (this connection is called a screw connection, which is also a removable connection; it can also be combined with a nut for a fastening connection between two parts with a through hole. Tightening screws are mainly used to fix the relative positions between the two parts. Special purpose screws such as hanging ring screws are used for lifting parts. The shape is generally flat 6 corner cylindrical.

4. Nut: with internal thread holes. There are also flat square cylindrical or flat cylindrical shapes. They are used to fasten and connect 2 parts to make them a whole. However, the threads on the screw are dedicated threads for self-tapping screws. They are used to fasten and connect 2 thin metal components.

5. Self-tapping screw: similar to machine screws. To make it a whole, small holes need to be made in advance on the component. Because this screw has a high hardness, it can be directly screwed into the hole of the component to form a responsive internal thread in the component. This connection form is also a removable connection. However, the threads on the screw are special wood screw ribs.

6. Wood screws: They are also similar to machine screws. Wood screws produced by cold heading machines can be screwed directly into wooden components (or parts) and are used to tightly connect a metal (or non-metal) part with through holes to a wooden component. This connection is also an assembly connection. It can increase the contact surface area of ​​the connected parts.

7. Washers: A type of fastener with a flat ring shape. It is placed between the support surface of bolts, screws or nuts and the surface of the connecting parts. It reduces the pressure per unit area and maintains the surface of the connected parts from being damaged. Another type of elastic washer can also prevent the nut from loosening back. It plays a role in preventing the parts on the shaft or hole from moving left and right.