What are rivets?
A rivet is a nail-shaped object used to connect two parts (or components) with a through hole and a cap at one end. In riveting, the riveted parts are connected by self-deformation or interference.
Blind rivets
Blind rivets are a type of rivets for single-sided riveting, but special tools-riveting guns (manual, electric, pneumatic) must be used for riveting. This type of rivet is especially suitable for riveting occasions where it is inconvenient to use ordinary rivets (riveting from both sides), and is widely used in construction, automobiles, ships, airplanes, machinery, electrical appliances, furniture and other products. Among them, open-type oblate head blind rivets are the most widely used, countersunk head blind rivets are suitable for smooth riveting occasions, and closed-type blind rivets are suitable for riveting occasions with higher load and certain sealing performance.
Types of rivets and their uses
1. The fan rivet is specially designed for manual installation. It can be pulled in through the hole of the panel or the bottom frame. It is made of elastomer material and has good toughness. The design is ingenious and has elastic function. It is not easy to slip out after being pulled in with the corresponding aperture. Fan rivets are mainly used to fix the fan, heat sink and chip of the electronic computer case, with anti-vibration and noise reduction.
2. The core rivet is a new type of riveting fastener that is very convenient for riveting. The core rivet can show its own unique advantages in a relatively small space or in an environment where there is no rivet gun or the rivet gun cannot be used. Two or more connected parts can be riveted successfully by hitting the nail core on one side with a tool such as a hammer. Drive rivets can be divided into oblate head drive rivets and countersunk head drive rivets according to the shape of the cap brim.
3. The types of rivets can be roughly divided into open type, closed type, double drum type and single drum type series.
4. Countersunk head blind rivets: the riveting of riveted parts that require a smooth and beautiful surface after riveting.
5. Double-drum blind rivet: When riveting, the nail core pulls the end of the rivet body into a double-drum shape, clamps the two structural parts to be riveted, and can reduce the pressure on the surface of the structural parts. Mainly used for riveting various thin structural parts in vehicles, ships, construction, machinery, electronics and other industries.
6. Brim blind rivets: Compared with ordinary blind rivets, the diameter of the aluminum cap of this rivet is obviously larger. When the rivet is riveted with the connector, it has a larger contact area and a stronger supporting surface to strengthen Torque strength, can withstand higher radial tension. Applicable industries: suitable for fastening soft, fragile surface materials and extra-large holes, increasing the diameter of the brim has special protection applications for soft materials.
7. Closed core blind rivets: Designed to cover the mandrel head after riveting, which is very suitable for various applications with waterproof requirements. It has high shear force, anti-vibration and anti-high pressure.
8. All-aluminum blind rivets: The rivet body also uses high-quality aluminum wire, which is beautiful and durable after riveting, and will never rust: Compared with ordinary blind rivets, the riveting strength of rivets is lower, and the material is softer.的连接件。 The connector.
9. Open stainless steel rivets: This rivet is the best choice for high tensile strength and corrosion resistance.
10. Flat head and oval head rivets: mainly used for riveting metal sheets or non-metallic materials such as leather, canvas, and wood.
11. Semi-hollow rivets: mainly used for riveting occasions where the load is not large.
12. Hollow rivets: light weight, weak nail head, used for riveting occasions of non-metallic materials with low load.
Matters needing attention for rivets
1. When checking the finished product of blind rivets, check: the diameter of the rivet body, the length of the rivet body, the thickness of the rivet body cap and the cap diameter, the total length of the mandrel, the exposed size of the mandrel, the size of the nail cap, and the outer diameter after assembly. consider. In the actual inspection, the weak links of the product can be measured, such as: tensile strength, shear resistance, and nail core anti-falling force.
2. The key is to pay attention to the rivets, the riveting foot is insufficient, whether the riveting is in place; or because the mandrel cap is too large, so that the rivet body nozzle cannot be pulled down; there is also a jumper, that is, the mandrel breaking force is too low or The fracture size is too small, etc.
3. Rivet material: aluminum, iron, stainless steel, alloy, etc.
4. The total thickness of the workpiece is generally 45%-65% of the length of the rivet, preferably not higher than 60%. In addition, working lengths that are too short are more troublesome, so it is recommended to use 50%-60% under normal circumstances. If the length of the rivet is too long, the rivet head will be too large, and the nail rod will be easily bent; if the length of the rivet is too short, the thickness of the pier will be insufficient, and the nail head will be formed incompletely, which will affect the strength and compactness. It is not good if the rivet length is too long or too short. Only the proper length can achieve the best riveting effect.
Qisheng Metal is a professional manufacturer of screws and nuts and other fastener products integrating R&D, production, processing and sales. Specializing in the production of special precision screws and nuts of various standards such as national standard GB, Japanese standard JIS, British BS, American ANSI, ISO and so on. Our products can meet the environmental testing standards of the European Union, the United States, Japan and other countries, and even more stringent testing standards. At present, our highest salt water anticorrosion standard can reach 2000 hours, and the surface hardness can reach HV2000. Various fasteners can be customized according to customer needs.
