SU929898A1

SU929898A1 - Rivet for load bearing areas

Info

Publication number: SU929898A1
Application number: SU802888355A
Authority: SU
Inventors: Александр Сергеевич Данов; Евгений Анатольевич Большаков; Лев Петрович Семенов; Лев Давыдович Арсон; Анатолий Григорьевич Лебединский; Аким Акимович Редько; Юрий Александрович Даниленко; Николай Андреевич Качалов
Original assignee: Харьковский авиационный институт им.Н.Е.Жуковского
Priority date: 1980-03-03
Filing date: 1980-03-03
Publication date: 1982-05-23

Description

(5t) ЗАКЛЕПКА ДЛЯ ОПОРНЫХ ПЛОЩАДОК(5t) STACK FOR SUPPORT AREAS

II

Изобретение относитс к машиностроению , а более конкретно к авиастроению .The invention relates to mechanical engineering, and more specifically to aircraft manufacturing.

Известна заклеткаг, состо ща из стержн и головки-выступа Llj.A known zakletkag consisting of a rod and a head-protrusion Llj.

Однако така заклепка не обеспечивает полного заполнени отверсти по всей толщине соедин емого пакета, особенно под головкой-выступом, что дает низкие показатели усталостной долговечности, надежности и герметичности соединени . Отсутствие Нат га по толщине пакета приводит к быстрому расшатыванию заклепки и прочностному ослаблению соединени .However, such a rivet does not ensure complete filling of the hole throughout the entire thickness of the package being joined, especially under the projection head, which results in low fatigue life, reliability and tightness of the connection. The lack of tension on the package thickness leads to the rapid loosening of the rivet and the strength weakening of the joint.

Наиболее близкой к изобретению по технической сущности и достигаемому результату вл етс заклепка, содержаща стержень и закладную головку , при этом стержень выполнен с осевым углублением, и закладна головка - с поднутрением на опорном торце и с выступом-компенсатором на внешнем торце 2.Closest to the invention to the technical essence and the achieved result is a rivet containing the core and the insertion head, wherein the core is made with an axial recess, and the insertion head is with an undercut on the supporting end and with a compensator protrusion on the outer end 2.

Однако при высоких показател х усталостной долговечности, надежности и герметичности использование известной заклепки дл сборки опорных площадок, в частности летательных аппаратов, или других опорных.площадок , не обеспечивает необходимой сцепл емости опорных площадок е движущимис по ним объектами, что требует установки или выполнени элементов, дополнительно повышающих сцепл емость (например выполнение насечек и шипов, установки накладок) а это повышает вес кострукции, существенно усложн ет технологию, и требует дополнительны х затрат труда.However, at high rates of fatigue life, reliability and tightness, using known rivet for assembling support sites, in particular aircraft, or other support sites, does not provide the necessary attachment of support sites to objects moving along them, which requires installation or performance of elements additionally increases adhesion (for example, making notches and spikes, installing linings), and this increases the weight of the structure, complicates the technology, and requires additional labor costs.

Целью изобретени вл етс расширение функциональных возможностей.The aim of the invention is to expand the functionality.

Claims

This goal is achieved by the fact that in a rivet containing a rod with an axial recess and a mortgage head with an undercut on the supporting end and with a protrusion-compensator on the outer end, an axial pinch is made on the outer end of the embedment head, which is separated from the compensator ledge by an annular groove, the depth of which equal to the height of the ledge compensator. FIG. 1 depicts the proposed rivet; in fig. 2 - the same, after installation in the package of parts with riveted tool bodies connected to it; in fig. 3 - the same, after riveting. The rivet contains a mortgage head 1 with an annular protrusion-compensator 2, the diameter of which is equal to the diameter of the rod 3 of the rivet, as well as with the under-15 nutnation k on its supporting surface. ) The center of the outer end of the head is provided with an axial thorn 5, separated from the protrusion compensator by an annular groove 6, the depth of which is equal to the height of the protrusion-compensator 2. The protrusion-compensator 2 provides a sharp increase in contact stresses from the tool during riveting. the zone at the interface of the inset head with the rod; this is also facilitated by the presence of the annular groove 6. Improvement of the distribution of the rivet rod over the package thickness, especially at the interface between the inset head and the st Undercut also contributes to the undercut on the supporting end of the head. A specially made riveting tool transmits force only to the protrusion-compensator, excluding the deformation of the axial spike, which ensures the necessary adhesion of the bearing pads to moving objects. At the end of the rivet rod, an axial recess 7 can be made, which ensures friction reduction and redistribution of contact stresses. 9 84 The execution of the rivet of an axial thorn, for example, a conical rim separated from an annular compensator by an annular groove with a depth equal to the height of the protrusion-compensator, on the outer end of the head allows, along with an increase in adhesion, to significantly reduce the weight, simplify the design and manufacturing technology of supporting surfaces (of the cargo hold of the aircraft or helicopter, the ladder, ladders), for example, aircraft, by eliminating from the design the latest parts and components specifically included in them magnitude of adherence. The use of the proposed rivet in the respective structures of the aircraft makes it possible to obtain weight-optimal thin-walled power structures of their bearing surfaces. Claims of the invention Rivet for bearing pads, comprising a rod and a mortgage head, wherein the rod is made with an axial recess, and the insertion head with an undercut on the supporting end and with a compensator protrusion on the outer end, o. that, in order to expand the functionality, an axial spike is made on the outer end of the embedded head, separated from the compensator lip by an annular groove, the depth of which is equal to the height of the compensator lip. Sources of information taken into account in the examination 1. Aviation normal-SStAH.

2. USSR author's certificate f 567860, cl. F 16 B 19/06, 197 (prototype).

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