Round Head Rivet

The round head rivet is a common type of rivet. The following is a detailed introduction to the round head rivet:

Structural Features of the Round Head Rivet

Head Shape: The head of the round head rivet is semi-circular with a relatively smooth arc. This shape enables the head of the rivet to provide a larger bearing area after installation. At the same time, it has a good appearance effect, giving a sense of simplicity and smoothness.

Shank Structure: It is usually a solid cylindrical shank. This structural design can ensure that the rivet has sufficient strength and rigidity to withstand the tensile and shear forces during the connection process, ensuring a tight connection between the connected components.

Material Selection of the Round Head Rivet

Carbon Steel: It has high strength and hardness and can bear large loads. It is suitable for occasions with high requirements for connection strength in the general industrial field, such as machinery manufacturing, building structures, etc. Its cost is relatively low, and it has a high cost-performance ratio.

Stainless Steel: It has excellent corrosion resistance and oxidation resistance and is suitable for harsh environments, such as humid outdoor environments, chemical production workshops, etc. It can ensure that the rivet will not be corroded during long-term use and maintain good connection performance. It is often used in equipment and structures with high requirements for corrosion resistance.

Aluminum Alloy: It is light in weight and has a certain degree of corrosion resistance. It is often used in fields that are sensitive to weight, such as aerospace, electronic equipment manufacturing, etc. While ensuring the connection strength, it helps to reduce the overall structural weight and improve the performance and portability of the product.

Manufacturing Process of the Round Head Rivet

Forging: First, heat the metal material to an appropriate temperature, and then process it into the approximate shape of the rivet through the forging process, including the preliminary forming of the head and the shank. During the forging process, the grains inside the metal material are refined, and the structure becomes denser, thus improving the strength and toughness of the rivet.

Machining: Carry out precise machining on the forged rivet to ensure its dimensional accuracy. This includes fine processing of the shape and size of the head to make it meet the design requirements of the round head, as well as precise cutting of the length and diameter of the shank to ensure that all dimensions of the rivet meet relevant standards. At the same time, carry out surface grinding and polishing treatment to reduce surface roughness, improve surface quality, so that the rivet can fit better with the connected part after installation and have a better appearance.

Heat Treatment: For some round head rivets with high performance requirements, heat treatment processes such as quenching and tempering will be carried out. Through heat treatment, the mechanical properties of the rivet, such as hardness, strength, and wear resistance, can be further improved to meet the usage requirements under different working conditions.

Application Fields of the Round Head Rivet

Aerospace: In the structural connection of aircraft, round head rivets are often used for the connection of some internal structural components, such as the connection of the internal framework of the wings and the connection of the fuselage frames. Its semi-circular head can, while ensuring the connection strength, provide good aerodynamic performance and reduce air flow resistance.

Automobile Manufacturing: It is widely used in the manufacturing of automobile bodies, such as the connection of the body shell and the fixing of chassis components. The high strength and good appearance performance of round head rivets can meet the strength requirements of the automobile during driving and make the body surface more beautiful at the same time.

Electronic Equipment: It is relatively common in the assembly of the casings of electronic equipment, such as the connection of the casing frames of mobile phones, tablets, laptops, etc. The small size and good connection performance of round head rivets can ensure the firmness of the casings of electronic equipment without affecting the appearance beauty of the equipment.

Furniture Manufacturing: It is also applied in the furniture manufacturing field, especially in the structural connection of some wooden furniture, such as the connection of the frames of tables and chairs, the assembly of cabinets, etc. The round head of the round head rivet can fit better with the surface of the wood, increasing the stability of the connection and playing a certain decorative role at the same time.

Marking Method of the Round Head Rivet

The marking of the round head rivet usually includes information such as the product name, nominal diameter, nominal length, material, and surface treatment. For example, the marking "Rivet, Round Head, GB/T xxx - xxxx, 5×25 - Stainless Steel, Passivated" indicates a round head rivet with a nominal diameter of 5mm, a nominal length of 25mm, a material of stainless steel, and a surface treatment of passivation. Among them, GB/T xxx - xxxx is the corresponding national standard number, and different types and specifications of round head rivets should be marked in accordance with the corresponding standards for easy identification and selection.

Installation Precautions of the Round Head Rivet

Aperture and Hole Depth: During installation, it is necessary to ensure that the diameter of the installation hole on the connected part matches the nominal diameter of the rivet. Generally, the aperture is slightly larger than the diameter of the shank of the rivet to facilitate the insertion of the rivet. The hole depth should be controlled according to the size and design requirements of the rivet head. It is necessary to ensure that the head of the rivet can completely cover the installation hole, but it should not be too deep to cause the shank of the rivet to be loose in the hole, affecting the connection strength.

Riveting Tools and Pressure: Select appropriate riveting tools according to the material and specifications of the rivet, such as pneumatic riveting machines, hydraulic riveting machines, or manual rivet guns. During the riveting process, the magnitude of the pressure should be precisely controlled. If the pressure is too small, the rivet may not be able to deform sufficiently and will not be closely combined with the connected part; if the pressure is too large, the head of the rivet may be overly deformed or the shank may break, affecting the connection performance and appearance effect.

Verticality and Concentricity: When inserting the rivet into the installation hole, it is necessary to ensure that the axis of the rivet is perpendicular to the surface of the connected part and concentric with the installation hole. This can enable the rivet to be evenly stressed during the riveting process, ensure that the head can completely form a semi-circle, and at the same time ensure that the shank is closely matched with the hole wall, improving the strength and stability of the connection.