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What is Rivet?

A rivet is a popular mechanical fastener to join two or more materials. A rivet consists of a head at one end and a cylindrical body at the other end, called its shaft. The tapered end of the shaft is called the rivet’s tail. The tail looks like a metal pin. Rivets are used to join large structural pieces and small electronic assemblies. The shafts are hollow with another internal piece called a mandrel. The mandrel allows the riveter to deform the tail of the rivet without striking it directly.

Advantages of Rivet

Durability

Unlike a bolt that can become loose over time, rivets are durable fasteners that securely stay in place after installation. Their larger surface area also gives them high-pressure resistance, making them less likely to snap or break.

Versatility

Rivets are versatile fasteners that can be drilled into different materials such as plastic, wood, and metal. This makes them a more practical option for those looking for a one-size-fits-all solution.

Installation

Rivets are quick and simple to install using either manual or automatic riveters making them a good option in production manufacturing.

Affordability

Rivets are typically made from steel and aluminum. These materials are both strong and inexpensive. Rivets are a great choice if you want fasteners that offer the most value for money.

Copper Countersunk Head Solid Rivet
Copper countersunk solid rivet is a high quality rivet designed for fastening and joining, made of high quality copper, with excellent electrical conductivity and corrosion resistance. The
Solid Rivet
A solid rivet is a fastener made of a metal material that is used to join two or more materials. It consists of a cap, a shaft and a Mosaic, in which the shaft is solid inside without a hollow part.
Cored Rivet
Hollow rivet is a common connection element, suitable for connecting metal, plastic, composite materials and other materials. Its structure consists of three parts: a long pedicle part, a small
Semitubular Rivet
Semi-hollow rivet is a special fastener with a unique structure and a wide range of applications. The following is a detailed description of the semi-hollow rivet
Half Round Head Embossed Solid Rivets
Head design: The design of the semi-round head makes the rivets better fit with the connected material, increasing the stability and firmness of the connection. At the same time, embossing treatment
Countersunk Head Blind Rivet
Countersunk head core-pulling rivet is a special type of rivet, its characteristics are mainly reflected in its structure and use scenario.First of all, from the structural point of view, countersunk
Non-standard Rivet
Non-standard rivet is a rivet used for single-sided riveting, which is characterized by the need to use special tools, such as a riveting gun, for riveting. This kind of rivet is especially suitable

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Types of Rivet

Blind rivets
A blind rivet is the most recognizable type of rivet, and is also referred to as a pop rivet. These rivets are used when there is no access to the rear of the two parts being fastened. A blind rivet assembly consists of a shank and a stem. To install, the thicker shank is placed into a precisely drilled hole, and a handheld or pneumatic rivet gun is used to pull on the stem, which has a slightly larger diameter on the end of the shank. The pulling action causes the shank to plastically deform and clamp the two parts together.

Solid rivets
Solid rivets are the oldest form of rivets, and have been used on ships and large steel structures like bridges. A solid rivet consists of a shank and a head. The head can be rounded, conical, countersunk, flat, or oval. To install, solid rivets are placed into a pre-drilled hole, then a hammer or a rivet gun is used to permanently deform the straight end into the required head shape.

Tubular rivets
Tubular rivets are similar in form to solid rivets; however, on the straight side of the rivet, there is a hole that travels a short distance into the shaft. Tubular rivets are designed to be easier to install when compared to solid rivets because less force is required to deform them. This is because only the thin walls of the hole must be flared outwards to secure the joint. Tubular rivets are used in applications such as hvac ducting and other low-risk applications due to their thinner walls.

Drive rivets
A drive rivet is a type of blind rivet that consists of a short shank and a protrusion on the head of the rivet. Once the rivet is placed into a pre-drilled hole, the protrusion is driven with a hammer. This action causes deforms the shank outwards, clamping the joint. Installation of a drive rivet does not need a special riveting tool like a standard blind rivet. Drive rivets are typically used in commercial sheet metal fabrication.

Split rivets
A split rivet is a light-duty rivet whose shaft is split into two separate legs. The rivet is installed into a pre-drilled hole, then the two legs are separated and flattened with a hammer against the rear component. Split rivets are often used on plastics, textiles, and thin metal sheets — they are is not as robust as blind rivets.

Self-piercing rivets
Self-piercing rivets are unique for two reasons: First, they need no pre-drilled holes, and second, the rivet does not pass completely through the second plate. To install a self-piercing rivet, two plates are placed into a press in which the rivet is held in a blank holder and pressed into the top sheet. The rivet then pierces into the second sheet without passing all the way through — a die on the rear side helps prevent the rivet from passing through — and an embossed section is produced on the rear plate.

Working Principle of Rivet

The working principle of the pop rivet is realized by pulling the core head with a force from inside to outside.If you want to use pop rivets better, you must first understand the working principle in detail.

The open-type round-head pop rivets are the most widely used. The countersunk head pop rivets are suitable for riveting occasions where smooth performance is required, and the closed-type pop rivets are suitable for riveting occasions where high load and certain sealing performance are required.

Riveting of pop rivets is to use a metal cylinder or metal pipe (rivet) with a slightly smaller perforation diameter to pass through the workpieces to be riveted and knock or pressurize the surfaces of both ends of the rivet to deform and thicken the metal column (pipe) while forming rivet heads (caps) at both ends so that the workpieces cannot be detached from the rivet. When subjected to the external force that separates the workpieces, the nail rod and nail cap bear the shear force generated to prevent the workpieces from separating.

Riveting of pop rivets can be divided into cold riveting and hot riveting. Cold riveting refers to riveting at room temperature,

Hot rivets are used in places with higher link requirements, such as the riveting of steel beams of iron bridges. During hot riveting, the rivets need to be preheated, the red-hot rivets are inserted into the rivet holes, and the rivet heads are made. The stress of shrinkage during the cooling process will make the connection tighter.

Riveting generally requires a double-sided operation. The appearance of the pop rivet makes single-sided operation more simple and easy.

Materials Used in Rivet

Aluminium
With added magnesium, aluminium is lightweight, corrosion resistant when used with a compatible material, and durable. Pure aluminium rivets are not strong enough for structural components, and will require the addition of alloying elements if used for that purpose.

Brass
Malleable with high strength and low friction, brass rivets for metal do not create sparks, as welding does. For this reason, brass rivets are ideal for making a gas-tight joint, which is why the typical application is gas appliances.

Copper
Copper is ductile and offers high strength and decorative appeal. As an excellent conductor of electricity and heat, copper rivets for metal are well suited for electrical appliances.

Copper nickel
Often, these rivets are 80% copper and 20% nickel, which gives these fasteners high resistance to corrosion, stress corrosion and high temperatures. For these reasons, copper-nickel rivets are commonly used in ship manufacturing and appliances that operate in corrosive environments.

Steel
Good tensile strength, hard, durable and withstands wear, high-carbon steel rivets require more material while their moldability decreases. Low-carbon steel does a better job at fitting well in its application. While it’s weaker due to its lower carbon content, it still has good tensile strength. Both steels are used in aircraft, automotive and rail transport, while low-carbon steel rivets are also found in the construction and furniture industries. Both work well as structural steel rivets.

Stainless steel
Strong, hard, withstands wear with very good corrosion resistance. Stainless steel rivets have good hygienic characteristics, strength-to-weight advantage and good impact resistance. Stainless steel rivets are used in aircraft, automotive and rail transport.

Plastic
Plastic rivets can be used to join non-plastic materials, such as sheet metals, rubber, urethane and other softer materials. You’ll find plastic rivets in consumer appliances electronics, construction and furniture.

How to Choose Rivet

Evaluate material grip
Choosing the right rivet size can be facilitated by evaluating the material grip. It could be determined how well the rivet can hold the materials it is used to establish a joint while having a high level of precision and error reduction. The following strategies could be implemented to ensure that the rivet safely fits the materials and does not easily break due to not having the right dimension.

Grip range should be evaluated
The grip range of a rivet concerns the thickness of the materials that it can most effectively join. It is essential to pick a rivet that has a grip range compatible with the total thickness of all materials that a rivet intends to connect. For instance, when connecting two sheets with a 0.125-inch width, one should choose a rivet with a 0.25-inch grip range.

Material compatibility requires assessment
Not only the rivet’s material should be taken into consideration of the materials a joint is intended to connect should require attention. If a rivet and a to-be-joined sheet are made of aluminum, there will be no galvanic corrosion caused by mixing different materials that might not be compatible. In the case when selecting one made of a dissimilar metal, the materials may intersect and result in a lowered material integrity.

Joint requirements should be evaluated
The rivet size should be sufficient to handle both the shear and tensile loads and not break under pressure. Thus, for any joint, an assessment of the operational and resultant stresses should be completed to choose a perfectly fitting rivet that will not only not stand out but will also withstand the operational loads.

Measurement tools should be used
The evaluation of the rivet material grip can be completed by taking measurements. In the specifics of the problem, it will be necessary to take precise measurements, using calipers, micrometers, and other tools to determine the existing material thickness. I would take measures to ensure that the rivet used is the right size, fitting the material very tightly and being reliable and durable.

Choose the right rivet diameter
Choosing the right diameter of the rivet is one of the important components to make a solid and reliable fastening. In the current guide, I will describe how to properly select the rivet diameter for any type of connections.

Matching rivet diameter to hole diameter
Rivet diameter should coincide or be slightly larger than the hole in the connected materials. In practice, the ideal solution is to increase the diameter over the hole-size by the range of 0.1-0.3 mm, because this error provides a quintessential rigidity of the joint. In other words, a 4.0 mm hole should be appropriately connected using a 4.1-4.3 mm rivet diameter.

Consider the influence of expansion
Both of the connected materials can face expansion under the influence of temperature or other environmental changes. For this reason, a user should consider the corresponding diameter that will allow the materials to deploy without destroying the joint, because expansion is a material property that should be measured at a particular company.

Diameter vs. Load
It is essential to understand that the load is applied to the diameter of the rivet and thus, a larger diameter means the ability to sustain load. Therefore, a user should consider the approximate load and amount of potential force on the joint to understand the necessary diameter. For specialized applications, where the diameter is of extreme precedence, it is better to consult the engineering specifications, which considers riveting split systems.

Matching rivet length
Ensuring the correct rivet-length is important for a secure and durable joint. If the length of the rivet is too short, the joint is at risk of becoming loose and failing over time. Similarly, if it is too long, it poses a cosmetic problem, making the joint unnecessary bulky and aesthetically unpleasing. Here’s how you can match the perfect rivet-length to your application:

Calculate total material thickness
This is the basic step, the starting point for determining what length your rivet should be. For instance, if you are joining two pieces of metal, 0.1 inch thick each. The total material thickness in this case is 0.2 inches.

Add clinch allowance
Clinch allowance is the extra length on top of the thickness of the material, it needs to ensure that the rivet can form a proper ‘shop head’on the blind side of the assembly. As a rule of thumb, add 1.5 times the diameter of the rivet to the material thickness. Thus you can add an additional 0.15 inches to the total thickness, if the dado of the rivet in this case is 0.1 inches.

Application of Rivet

Construction and infrastructure

The construction industry commonly uses rivets to join structural steel beams and other components. They are also used in infrastructure projects like bridges, dams, and tunnels.

Automotive industry

A rivet is a fastener that joins components such as body panels, chassis components, and other parts in the automotive industry.It is particularly useful for joining dissimilar materials, such as aluminum and steel. High-stress applications benefit from rivets’ resistance to vibration and fatigue.

Electrical and electronics industry

The electrical and electronics industry uses rivets to join circuit boards, battery terminals, and electrical contacts. They provide high-current and temperature-resistant joints.

Marine industry

Ships and boats, for instance, use rivets to connect the hull, deck, and frame together. Rivets are ideal for marine applications due to their high strength and corrosion resistance.

Furniture industry

Rivets are also used in the furniture industry. They can connect furniture components like frames, legs, and arms. For people to sit or lean on, they ensure a strong, durable joint that can support their weight.

Sports equipment industry

Rivets are used in the sports equipment industry for joining components such as bicycle frames, ski bindings, and skateboards.The high strength and durability of rivets make them ideal for these applications.

FAQ

Q: What is a rivet?

A: A rivet is a popular mechanical fastener to join two or more materials. A rivet consists of a head at one end and a cylindrical body at the other end, called its shaft. The tapered end of the shaft is called the rivet's tail. The tail looks like a metal pin.

Q: Why use rivets?

A: Rivets offer a number of advantages over threaded bolts. They won't loosen when subjected to vibration and can secure joints with short clamp length. On the other hand, compared to threaded bolts, they are cumbersome and time consuming to install and remove, and offer limited clamp load.

Q: Is a rivet stronger than a screw?

A: Compared to screws, rivets hold much better. They are impossible to open and won't shake loose. This is because the screw only has a head on one side whereas the rivet is supporting both sides. This is also important in the transport process where the frame is subject to vibration.

Q: What is the difference between bolt and rivet?

A: Bolts are temporary fasteners, whereas rivets are permanent fasteners. You can easily remove bolts after installing them; you just need to use the same bit that you used to install the bolts but in reverse. Rivets are permanent fasteners, so you can't easily remove them.

Q: When to use a rivet?

A: They are particularly well-suited for binding soft, thin materials and otherwise fragile connections. Some of the most common, everyday rivet applications include: Building and construction — gutters, fiberglass roofing, hanger straps, windows, doors, window blinds, wind guards, and custom wall installations.

Q: Why use rivets instead of welding?

A: If you are joining two pieces of different types of materials together, riveting can be the ideal solution. Rivets can effectively join dissimilar materials, such as metal and plastic, where welding might not be suitable or even possible.

Q: Why are rivets so expensive?

A: The larger the size of the blind rivets and the more material used, the price will increase. Different head types (e.G. Round head, countersunk head, large flange head) and special shapes of rivets are complicated to manufacture and more expensive.

Q: How effective are rivets?

A: If you want a permanent joint, then quality rivets have the advantage, as they have to be damaged or even broken to be removed. Rivet fasteners can also secure joints with short clamp length, and they don't loosen when exposed to vibration. This is why aircraft rivets, such as blind rivets, are used.

Q: What is the strongest type of rivet?

A: What is the strongest rivet? Stainless steel rivets combined with either stainless steel or steel mandrels are the strongest. However, steel rivets combined with steel mandrels are also solid.

Q: What is stronger, a screw or a rivet?

A: With the above description, you can clearly know that rivets are stronger than screws! Rivets provide a stronger and more secure connection, and its unique design of spreading the load enhances shear strength and load carrying capacity.

Q: Is a rivet as strong as a bolt?

A: If the application requires a high level of strength or needs to withstand large tensile or shear forces, bolts may be a more appropriate choice. For other applications, rivets would be a better choice.

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