The scope of use of such a fastener as rivets is so extensive that it is impossible to recall a single technology industry, wherever it is used.
Traction rivets, for example, are used for fastening delicate materials, forming completely closed combinations, reliable connections, etc. such industries as: aviation, production of cabinet and upholstered furniture, boats and their repair, ventilation systems, construction, mechanical engineering and even playgrounds with attractions cannot be imagined without rivets.
In this article we will talk about the main types of rivets, their technological characteristics, scope and methods of fastening. You will learn what are the features of pull-out, threaded, aluminum, steel, screw, nut, stainless rivets.
What are open, closed, reinforced, petal, spacer, multi-clamp, terminal cassette and plastic rivets.
They were created in order to facilitate work and reduce production costs. In addition, the rivet has a number of technological characteristics that make it irreplaceable and reliable. Let's consider the main types of rivets and their characteristics.
This type of rivet belongs to the standard type.
Its body has a through hole, so it resembles a hollow rivet. The main difference from the hollow one is that after riveting the head remains in the rivet body, in the form of a part of the return head.
The scope of application of this rivet is where there are no strict requirements for strength and reliability, the thickness of the materials fluctuates, and the size of the holes with minor discrepancies. These rivets are the most popular in the fastener market.
The body of the rivet does not have a through hole, which in turn makes it possible to create a reversible head that seals the hole.
Based on this, such rivets have a second name - closed rivets. The tight connection prevents moisture, dust and dirt from penetrating inside. If additional gaskets are used, the connection can be completely sealed.
This type of fastener is intended for fastening with an increased boundary of the fortress.
The coefficient of forces applied to stretching and shearing is significantly higher than that of a standard rivet. Therefore, the connections are very reliable as a result. The reversible head, which is formed by riveting, connects the components securely and creates a strong, vibration-free connection. Such a rivet is most often used in the engineering industry, aviation, etc., that is, those where a strong connection of structures is required.
These rivets are suitable for joining plastic materials: wood plates, plastic, chipboard, and more.
When riveting, the rod opens the body of the rivet to the petals, which, when bent, run into the surface of the materials to be joined.
Thus, the reverse head is formed. The main task of this type of head is to ensure maximum contact area and correct load distribution.
The head does not sink into the material, remaining in place.
These rivets are intended for mounting delicate and soft materials. When riveting, the reverse head is created in a special way - folding, it spreads its load over a considerable area, the seamy surface of the materials that one connects. This is what keeps the head from falling through soft materials, thereby preventing deformation and cracking.
There is no need to make a hole for such rivets. They are designed for joining plates with fibrous and smooth materials (plastic with wood).
When attaching a nut rivet, the reverse head is not formed.
When pulled out, the tear-off rod makes the rivet body wider, and the notches dig into the fibers of the material. Spacer or screw rivets are used in the manufacture of furniture, construction - for joining metal and wood.
These are the same blind rivets, but with a large spread in the thickness of the materials that need to be joined. This rivet is designed to cover the ranges of 3 conventional blind rivets and is used in cases where there is no exact data on the thickness of the materials to be joined.
Such rivets are used, if necessary, to create a contact connection and conduct an electrical network. Terminal rivets are made from materials capable of passing an electric current. The name speaks for itself, this fastener element has terminals (one or more).
Such fasteners are made of polyamide, but at the same time they have a reliable connection.
Plastic rivets practically do not differ from standard blind rivets, and even have their own advantages.
Namely: high level of moisture permeability, non-susceptibility to corrosion, do not conduct current. They are used for fastening items made of plastic, cardboard, fiberglass.
This is an independent type of rivets. The fastening process is the same as that of a blind rivet, with the difference that this type of fastener has one rod for a whole cassette, which does not break, but stretches through the rivet body, fixing it into holes. The master only needs to load the cassette into the riveter, and not separately and work.
This allows you to leave one hand free and significantly reduces working time.
Important! Technological characteristics and the name of rivets can often vary from manufacturer to manufacturer. Also, from time to time, new types appear on the fastener market.
When choosing hardware, it is important is the size of the rod itself, which ranges from 1 to 36 mm, and its length is 2 to 180 mm. It is a mistake to believe that the thicker the rod, the stronger it is, this does not matter here.
Steel rivets with a thickness of 10 mm may be more reliable than copper products with a diameter of more than 20 mm. Also, the load exerted plays a role.
Therefore, in some cases it is better to purchase tubular rivets with thin walls. Types of rivets with a small semicircular head are characterized by a small thickness within 1 - 10 mm, and a length of 4 - 80 mm.
The thickness of the flat head rivet is 2 - 36 mm, and the length 4 - 180 mm.
Elements with a maximum length are semi-blind rivets, which are used to work in rivets that can be used in structures with a 200 mm recess.
There are many such variations, but the most popular are rivets. They are used for working with soft and loose materials.
The head of such hardware is folded when riveted, in such a way that it makes it possible to distribute the load over a large area of the structure.
Petal hardware is used to work with wood.
It is this type of fastener that allows you to reliably fix the fibrous structure of the tree.
Multi-clamp hardware fasten materials of different thickness and form a universal type assembly.
Cassette rivets are high-tech types of hardware, in which the elements of the fixed stop are represented by several dozen levels.
In this case, only one bar is the base of the carrier.
Most of the rivets are made of metal: steel, aluminum, copper and brass.
All of them have a high level of protection against deformation and corrosion.
Aluminum and copper rivets are more ductile and also lightweight.
Steel rivets are used to work with structures for which it is necessary to provide a high degree of fastening.
Plastic rivets are made of polyamide, which has high strength and good performance. Provide reliable protection against the harmful effects of moisture, which is not the case with galvanized stainless rivets.
Nowadays, the technology of hot soldering of plastic hardware and composite materials is often used. This allows you to create a strong seal.
There are also models of the combined type rivet aluminum steel, steel, etc.
Aluminum hammer rivets are widely used in mechanical engineering, aircraft manufacturing, household appliances and personal computers.
Has a second name percussion, because of the method of attachment.
Aluminum hammer rivet is manufactured in different classes of fastening reliability, has different types of heads, length and diameter.
The rivet thread unites them with other types of hardware. But threaded ones are characterized by the way they are fixed on both sides. The rivet body is immersed in the previously prepared hole, then the master inserts the sleeve and twists it.
This provides a high degree of fastening security, although not suitable for all materials.
In this regard, the blind rivet is more popular.
Note. The principle of the pull-out connection provides for deformation of the structure at the end of the riveting process to produce a stop.
The process of installing rivets takes place in several stages. To begin with, use a drill to make a hole into which the element will be inserted.
Posts of all types of rivets are installed in a niche with a diameter 10 - 15% larger than the thickness of the rod.
Note. Immersion density is not important.
The hardware is riveted into the hole so that the head is on the reverse side of the structure. Threaded rivets are installed using a hand-held riveter.
Explosive steel rivets or spacer rivets are installed with a special rivet (electric or piston rivets).
Basically, the rivet is used in mechanical engineering, aircraft construction, shipbuilding, house construction, fastening ventilated facades, production of children's playgrounds, fastening decorative structures and elements.
These fasteners are mainly used in the construction industry and repair work. Heavy structures are not fastened with this type of hardware.
It is very important that the rivet has flexibility and strength at the same time. Considering this fact, low-carbon steel, aluminum alloys and copper are used for its production.
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