Solid rivets are some of the most popular mechanical fasteners. Although various types of rivets are available, the solid types are the oldest and most reliable. For this reason, they are widely used where safety is of paramount importance. They can be installed through various methods which increases their appeal. Pneumatic, hydraulic, manual or electromagnetic processes are all highly effective in driving the rivets. Some of the more commonly used types are explained below.
1. Blind Rivets
A mandrel runs through the center. Blind rivets are useful where it is undesirable for the rivet tail to be seen. Once the rivet has been driven into the work pieces, the mandrel is snapped off at the blind end. Since this process results in an unlocked mandrel, the carrying capability is significantly lowered. Vibrations may also cause the mandrel to break off. Blind rivets aren’t suitable for structural repairs. Where access to the joint is only possible from one side, blind rivets are useful.
2. Semi-Tubular Rivets
Semi-tubular rivets are also referred to as tubular rivets. A partial hole is evident at the tip of the rivet tail end. This calls for less force during driving processes. Waxing is an integral process for tubular rivets. This facilitates proper assembly. They offer a quick means of riveting where items are produced en masse. Tubular rivets are ideal to use as pivot points since the rivet only swells at the tail. The rivets are usually plated with tin, nickel, brass or zinc. Finished tubular rivets have the head to one side with a shallow blind hole apparent on the other side.
3. Compression Rivets
These have two members, a solid male rivet and a female tubular rivet. The unit is driven into the work piece with the male rivet on one side and the female tubular on the other side. When the two components are squeezed together, a press fit is formed.
4. Drive Rivets
A short mandrel sticks out through the head. The pin is driven into the shank using a hammer or some other tool. Due to less clamping force, drive rivets aren’t as secure as other rivets. Drive rivets are popular when installing wooden panels since it isn’t necessary to drill the hole all through the wood. This produces a better aesthetic effect. Materials that do not require enhanced fastening also work well with drive rivets.
5. Flush Rivets
Where a nice appearance is critical on external metal surfaces, flush rivets work well. These use countersunk holes to improve on the rivet appearance. Due to the countersunk hole, flush rivets are also referred to as countersunk rivets. Flush rivets are widely used in the aviation industry for aerodynamic purposes.
6. Friction Lock Rivets
They represent one of the earliest forms of blind rivets. Friction lock rivets, especially the Cherry friction lock, are very useful in repairing light aircraft. Two head styles with three standard diameters characterize friction lock rivets. Unfortunately, vibrations or other impact may result in the loss of the mandrel. This weakens the rivets considerably.