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Rivet – a fastener that forms a high-strength connection by riveting. Products have the shape of a cylindrical leg or tube and a head of various shapes.
The scope of these hardware products is quite wide. These are industries such as:
- aircraft construction;
- chemical production.
The rivet material is an extremely important factor. The choice of rivets by material directly depends on the type of material of the fastened parts and the environment in which the fastener will be located. A wide variety of materials are used as a raw material for blind rivets. This allows the use of hardware in almost all branches of industrial work.
Materials for making rivets can be as follows:
- Galvanized steel (10,15,20,25,45, etc.)
- Aluminum (B65, D18, Amg5P, AMts, AD1, etc.)
- Stainless steel (12Х18Н10Т, 14Х17Н2,13Х11Н2В2МФ, etc.)
- Brass alloys (L63, LS59-1, etc.)
- Titanium alloys (VT3-1, VT16, etc.)
- Copper (M2, M3, etc.)
Types of rivets
New varieties of rivets are constantly appearing, so there is definitely no complete list. Let’s consider the main and more popular ones.
- Classic or regular. Universal, used for all types of seams. You can distinguish externally — resemble fungi.
- Semi-tubular (stem is half-hollow). They require less effort during installation, but also have low strength. Used in joints with low mechanical stress.
- Embedded, pull-out, tear-off or traction. Composite (from two or more parts) hardware. The good thing is that during installation they do not need to be held on the second side of the seam. They are used to install fences or roofing materials.
- Piston. Suitable for light duty connections. They are made mainly of soft metals (aluminum and alloys, copper).
- Threaded (nut). For joining parts with thin walls (up to 0.3 mm). They differ in that the inner part has a cut thread, the outer — a vertical notch that prevents rotation around its axis. A screw is twisted inside, pulling the free part of the case to the junction. This is exactly how it turns out — due to creasing — closing head.
Rivets have the following head types:
- Semicircular (high and low). Sometimes it is also called spherical. The most reliable, creates a strong seam.
- Cylindrical and conical (flat). They are used if the connection is in a hostile environment.
- Secret and semi-secret. Installed when fasteners should not protrude above the surface. Most unreliable connection, used only when necessary.
- Technological production processes.
Rivets as fasteners have the following advantages:
- Reliability. The result of riveting is a strong and reliable connection, which is no longer possible to disassemble.
- Vibration resistance.
- Preparation for work is carried out in the shortest possible time. The riveting process itself takes a few seconds.
- Rivets are not susceptible to sudden bursting. Stretching is relatively slow, you will always have time to notice defects and prevent complete deformation of the metal element.
- The cost of rivets is very low compared to hardware products such as screws. This is due to the fact that for the production of rivets, a very small amount of metal is used on conveyor lines in streaming production
Each batch of rivets must be accompanied by a quality document indicating:
- name or trademark of the manufacturer;
- symbol for rivets;
- list and results of tests performed;
- net weight of the batch;
- temporary anti-corrosion protection and protection period.