Rough Semi-circular Head Rivets

Definition and Structure of Rough Semi-circular Head Rivets

The rough semi-circular head rivet is a mechanical part used for connecting metals or other materials. It consists of a head and a shank. The head is semi-circular, similar to half of a sphere, which is one of its main characteristics. The shank is cylindrical, usually with a certain length and diameter, and is used to pass through the connected components and fix them together through the riveting process.

Features of Rough Semi-circular Head Rivets

Firm Connection: Through the riveting process, the rivet forms a tight bond with the connected components, which can provide high connection strength, withstand large tensile and shear forces, and is suitable for occasions requiring reliable connections.

Good Seismic Performance: Due to the relatively tight connection between the rivet and the components, when subjected to vibration or impact, it can maintain the stability of the connection well, reducing the risk of loosening and falling off. Therefore, it is often used in some structures with requirements for seismic performance.

Simple Installation: Installing rough semi-circular head rivets does not require complex tools and processes. Just use simple riveting tools, such as rivet guns, etc., and the rivets can be quickly installed on the components, improving work efficiency.

Manufacturing Standards of Rough Semi-circular Head Rivets

The manufacturing of rough semi-circular head rivets usually needs to follow relevant national standards or industry standards, such as GB/T 863.1 - 1986 "Semi-circular Head Rivets - Rough". These standards clearly specify the dimensions, tolerances, materials, mechanical properties, and surface treatments of the rivets. For example, the standards will specify the size parameters such as the head diameter, height, shank diameter, and length of rivets of different specifications, as well as the mechanical property requirements such as the tensile strength and hardness of the materials.

Materials and Surface Treatments of Rough Semi-circular Head Rivets

Commonly Used Materials: Generally, materials such as low-carbon steel and medium-carbon steel are used for manufacturing. Low-carbon steel has good toughness and plasticity, is easy to process and rivet, and has a relatively low cost; medium-carbon steel has higher strength and hardness and is suitable for occasions with higher requirements for connection strength. In addition, in some special environments, materials such as stainless steel and copper are also used to manufacture rivets to meet special requirements such as corrosion resistance and electrical conductivity.

Surface Treatments: In order to improve the corrosion resistance and wear resistance of rough semi-circular head rivets, surface treatments are usually carried out on them. Common surface treatment methods include galvanizing, nickel plating, chrome plating, etc. These treatments can form a protective film on the surface of the rivets to prevent the rivets from being oxidized and corroded. In addition, according to needs, blackening treatment, phosphating treatment, etc. may also be carried out on the rivets to increase their surface hardness and wear resistance.

Application Fields of Rough Semi-circular Head Rivets

Construction Industry: In building structures, it is used to connect steel structure components, wood structure components, and some decorative materials, etc. For example, in light steel keel ceilings, semi-circular head rivets are often used to connect the keels together; in the installation of building doors and windows, rivets are also used to fix the door and window frames to the walls.

Automobile Manufacturing: A large number of rough semi-circular head rivets are used in the manufacturing of automobile bodies to connect various components of the body, such as doors, engine hoods, luggage compartment lids, etc. In addition, in the assembly of automobile chassis, rivets are also used to connect various brackets and components to ensure the stability and safety of the automobile structure.

Shipbuilding: During the shipbuilding process, rivets are important connecting parts for connecting the hull plates and structural components. Since ships travel at sea and need to withstand large external forces and corrosive environments, the high strength and good corrosion resistance of rough semi-circular head rivets can meet the connection requirements of the ship structure, ensuring the safety and reliability of the ship.

Machinery Manufacturing: In the assembly of various mechanical equipment, rough semi-circular head rivets are often used to connect the casings, brackets, transmission devices, etc. of mechanical components. For example, in the manufacturing of machine tools, rivets are used to fix the bed and workbench of the machine tool; in textile machinery, rivets are also used to connect various rollers, gears, and other transmission components.

Marking Method of Rough Semi-circular Head Rivets

The marking of rough semi-circular head rivets usually includes information such as the product name, nominal diameter, nominal length, material, and surface treatment. For example, the marking "Rivet GB/T 863.1 - 1986 10×50 - 20 Steel Galvanized" indicates a rough semi-circular head rivet with a nominal diameter of 10mm, a nominal length of 50mm, a material of 20 steel, and a surface treatment of galvanizing.

Purchase Precautions for Rough Semi-circular Head Rivets

Size Specifications: According to the thickness of the connected components, the hole diameter, and the connection strength requirements, select rough semi-circular head rivets of appropriate size specifications. Ensure that the diameter and length of the rivets can match the installation holes and can provide sufficient connection strength.

Material Quality: Select rivets of appropriate materials according to the usage environment and working conditions. For rivets used in humid and corrosive environments, stainless steel or materials with special anti-corrosion treatment should be selected; for occasions that bear large loads, the strength and toughness of the materials should be considered.

Appearance Quality: When purchasing, carefully check the appearance of the rivets, which should have no defects such as cracks, burrs, and deformations. The head should be complete and smooth, the shank should be straight, and there should be no obvious scratches and rust spots on the surface. At the same time, check the dimensional accuracy of the rivets to ensure that they meet the relevant standard requirements.

Installation and Maintenance of Rough Semi-circular Head Rivets

Installation: When installing rough semi-circular head rivets, first process appropriate installation holes on the connected components. The hole diameter should be slightly larger than the diameter of the rivet shank to allow the rivet to pass through smoothly. Then insert the rivet into the installation hole and use a riveting tool to rivet the rivet. During the riveting process, control the pressure and stroke of the riveting tool well to make the head of the rivet fully deformed and closely fit the connected components.

Maintenance: Regularly check the connection condition of the rivets to see if there are problems such as loosening, deformation, and corrosion. If the rivets are found to be damaged or the connection is not firm, they should be replaced in a timely manner. When repairing or maintaining the equipment or structure, also pay attention to checking and maintaining the rivets to ensure the reliability of the entire connection system. For rivets used in some harsh environments, such as in humid, acidic, and alkaline corrosive environments, the frequency of inspection and maintenance should be increased to promptly detect and handle problems to extend the service life of the rivets and ensure the safety of the connection.