SU1390447A1 - Permanent joint - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be used to connect sheet and other parts, including a package of parts. The purpose of the invention is to increase reliability by making it possible to obtain a hermetic joint. In the parts to be joined, blind sockets are formed with the formation of conical annular grooves. The rivets 1 are installed between the parts with the bandages 2 pre-worn on their thickened middle parts. The bandages 2 are made of a material whose strength characteristics exceed the corresponding characteristics of the material of the heads. A compressive force is applied to the parts and the heads of the rivets 4 are flared to create a one-piece connection. 1 hp f-ly, 9 ill. Sfi (L with so about 4: NU

Description

The invention relates to general engineering and can be used to connect sheet and other parts.

The purpose of the invention is to increase reliability by providing the possibility of obtaining a hermetic connection and reducing energy consumption when connecting parts.

FIG. 1 shows the connection, the general view; in fig. 2 - rivet inserted into the bandage and prepared for installation in the hole of the part, cut; in fig. 3 - rivet; in fig. 4 - connection of the package of parts; in fig. 5 - connection of parts with a blind rivet; in fig. 6 and 7 - connections of curvilinear surfaces of parts; in fig. 8 and 9 - angular connection details.

The connection of parts is as follows.

In the parts to be drilled, blind nests are drilled with the formation of conical annular grooves, into which the rivet 1 is inserted, preliminarily inserted into the bandage 2 and retained in it by means of an annular thrust bead 3. ending it and preventing deformation of the rivet in its middle part. The purpose of band 2 is also to reduce the shearing forces that occur in the connection of parts under adverse dynamic loads. Bandage 2 is made of flowable solid material, for example, high carbon steel, and a rivet is made of elastic, deformable, such as copper, or of durable material with cuts at the rivet heads A.

When the lower part of the rivet 1 is fastened, a detail is put on it, in which there is also a blind socket similar to that of the first part. A force is applied to the parts and the rivet is flared, a permanent connection is created.

Making holes in the parts to be joined, but in other places, to them

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in the same way, you can attach a variety of details (package).

The connection of the angular and curvilinear parts is carried out by a similar method.

The proposed device for joining parts will allow increasing the manufacturability of the assembly, reducing the number of rivets, increasing the reliability of the joint both in terms of shear forces and tightness of the joint.

Formula of invention

Claims (2)

1. A non-detachable joint containing a package of parts mated with supporting surfaces with blind sockets in the form of conical ring grooves, smaller bases facing the supporting planes, and riveted connecting elements with tubular conical heads at both ends placed in the slots of the connected details, in the central part of the sockets are made conical spacers located in the cavity of the heads of the rivets, characterized in that, in order to increase reliability by ensuring the possibility of obtaining a tight joint, each rivet is made stepped with a thickened middle part and provided with a bandage element covering its middle part and made in the form of a sleeve with an annular thrust collar radially inward at one of the ends, the strength parameters of the sleeve material are higher than the corresponding strength parameters of the material of the rivet heads , and each of the nests of parts made step with a profile corresponding to the profile located there are parts of the connecting element. 2. The connection according to claim 1, characterized in that, in order to reduce the energy consumption when connecting dewoo, the rivet tips are made with longitudinal slits. FIG. 2 Fy Fig.Z FIG. five Fig. € figl FIG. eight