RU1812347C - Method of connection of parts - Google Patents

Abstract

Usage: in mechanical engineering, in the manufacture of shear bolted joints. SUMMARY OF THE INVENTION: making a hole in the connected parts and a cylindrical socket for a bolt head, installing a bolt with a countersunk head in the hole, the head being previously bent from its plane by a bulge from the bolt rod, and the side surface of the head is conical with a taper angle to the bolt rod. The minimum diameter of the head is equal to the diameter of the socket under it, and after installing the bolt on the bolt, install a washer on the bolt and tighten the bolt with a nut. 3 ill.

Description

The invention relates to mechanical engineering, in particular to aircraft construction, and can be used in the manufacture of shear countersunk bolt joints.

The purpose of the invention is to reduce the energy intensity of the bolt installation process by reducing the pressing force.

In FIG. 1 shows the design and geometrical parameters of the parts to be joined and the connecting bolt; in FIG. 2 shows the construction of the joint after installing the bolt in the hole; in FIG. 3 shows the construction of a bolted joint of parts.

The developed method for obtaining the joining of parts consists in manufacturing one part 1 with a hole and a cylindrical socket 4, another part 2 with a hole 3 and separately manufacturing a bopt 5 with a cylindrical head 6, moreover, the diameter of the hollow bolt performs more . eleven

After manufacturing and hardening of the bolt, its head is formed by bending along the periphery towards the side of the bolt shaft and the side surface of the head is modified so that it becomes a truncated cone with a smaller base equal to the diameter of the socket for the head. After that, the bolt is installed in the hole with the tension, and the pressing force of the bolt Pe is applied around the periphery of the bolt head to eliminate the possibility of its straightening before the head is installed in the socket. After installing the bolt on the wall of the hole under it, a radial tension Dng is formed, and along the wall of the socket under the head Dn /, moreover, AN / is uneven in height of the socket (Fig. 2). The washer 7 is mounted on the bolt and the nut 8 is screwed on (Fig. 3).

When tightening the nut, the bolt head is straightened, redistributing the tension diagram along the height of the socket. moreover, depending on the gameplay Guypie00

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After finalizing the bolt head after its refinement, the tension diagram can take on a uniform character, or with an excess of tension at the place of transition of the bolt head to the rod (Fig. 3).

The proposed method for obtaining the connection of parts will reduce the force of pressing on the bolt, since a preliminary (before tightening the nut) installation requires less tightness along the height of the bolt head. Reducing the pressing force leads to a decrease in the energy intensity of the bolt installation process. In addition, the possibility of scoring at the input edge of the socket for the head is eliminated, since at the time of installation the minimum size of the head is equal to the diameter of the socket for it. ..

The developed method is recommended for the formation of packages of medium and large thicknesses with bolts of large diameter, for example, from steels of the type ZOKHGSA, Kh18N9T. With the same energy intensity of the process of installing the bolt, the developed method and analogues developed the method due to the implementation of tension on the head of the bolt

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Lit to increase the fatigue life of the connected parts with the socket under the head.

Claims (1)

SUMMARY OF THE INVENTION A method for producing a joint of parts in which one part is made with a hole, the other with a hole and a socket, a bolt with a head forming larger than the size of the socket, a bolt is installed in the hole of the parts with tension, placing the head in the socket, a washer is mounted on the bolt and screw the nut on, and so on, so that, in order to reduce the energy intensity of the installation process of the bolt by reducing the pressing force, the head is hardened before the head is formed, the head is formed by bending it according to periphery in the direction of the bolt rod with subsequent processing of its lateral surface on a truncated cone with a smaller base from the side of the bolt rod to a diameter equal to the diameter of the socket, and when installing the bolt in the holes of the parts, efforts are applied to the bolt head along its periphery.