![]() ![]() On the other hand, if too small rivet apply for thick material, that its shear strength is insufficient, to carry the load in place of the compound. If too thick rivet applied to a thin material, that effort, which occurs when you install the rivets, would lead to an undesirable swelling around the rivet head. The size (or diameter) of the rivets is selected in accordance with the total thickness of the riveted sheets. Universal head can be used in most other places. Rivets countersunk head used therein, where required aerodynamic surface smoothness. Head type, when choosing the size and strength of the rivet depends on such factors, as a form of stress, that act in place of the rivets, the type and thickness of material, which rivet and rivet the location in the plane. All this creates inconvenience for the production and therefore the majority of the alloy rivets 2024 was replaced by an alloy rivets 7050, which can be installed directly into the supply state. They were removed from the refrigerator just before installation. ![]() Therefore, usually the rivets quenched and stored in the refrigerator, to delay the hardening of their aging. ![]() These rivets are used in the so-called state svezhezakalennom. Quenching consists in heating to a temperature of about 500 ° C and cooling in water. 2024-T4 (D16) are too hard, to apply them directly to the delivery condition, and must be toughened before, how to install. Some of the "rivets" aluminum alloys, e.g. Aluminium alloy 7050 also has a full analog, but it refers to the type of alloy V94.įor repair of aircraft most commonly used aluminum alloy rivets 2117 (domestic analogue - alloy D18), so they can be installed in the state of delivery. Aluminium alloy 5056 It has a complete analogue, but is close to the alloy AMg5. Typically, aluminum rivets are made of aluminum alloys such, how 2017 T4, 2024-T4, 2117-T4, 70.ĭomestic alloy analogue 2017 It is the alloy D1, alloy 2024 - abortion D16, alloy 2117 - alloy D18. This rivet is used there, where required aerodynamic surface smoothness, for example, on high-speed aircraft. The angle of the countersunk head may vary from 60 ° to 120 °, but an angle of 100 ° was adopted as the standard, since such a head with one hand, provides the necessary strength (tensile and shear), a, with another, minimally protrudes from the surface of the structure. With universal head rivets have been specially designed for the aircraft as a replacement for conventional rivets with round head, and rivets with a low semicircular head ("brazier head").įigure 1 - The head of US aluminum rivets The solid rivet may have various shapes of heads, however, so-called universal head and the countersunk head with a cone 100 ° are the most common, at least, in American aircraft designs. This forms a second head rivet, which firmly holds together the materials to be joined. As a result of these actions the rivet shank expands to a diameter approximately one and a half times larger than the original. After that, as a rivet installed in this pre-drilled hole, the rear end face down or deform one of several ways, by riveting hammer manual to pneumatic tools riveted. To connect together two or more metal sheets, a rivet is placed in the hole diameter slightly larger, than the diameter of the rivet. SUMMARY rivet like fastenersīefore installation of the rivet consists of a smooth cylindrical rod with factory head at one end. Since the rivets are put "on continuously", the order, to take them off their drill, which it is quite a difficult task. Linked connections are in principle not sealed, if not riveting to use special sealants or gaskets. The greater the total thickness of the joined sheets, the more difficult it is good to combine them with rivets. The thing is, rivets that tensile strength is usually very low in comparison to their shear strength. Rivets are designed to work on a cut, however they are not used for joining thick materials or abraded material if subjected to tensile loads. Moreover, for setting the rivets can be used automated high-performance tools and equipment. The advantages of the rivets are relatively low cost, and less complexity compared to screws and nuts. They are also widely used and the construction and repair of small river and sea vessels, such as motor boats and aluminum boats. These rivets are the oldest and the most reliable of all types of fasteners. Rivet with a solid core - rivets under the hammer - are a common type of rivets, which are used in aircraft structures. For beginners it will be helpful for the first acquaintance with aluminum rivets, experts-professionals can be compared with the American practice of domestic, including, the repair aluminum boats and boats. Below are excerpts from a practical guide for the American aviation mechanics for use aluminum rivets in the repair of aircraft.
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