SU1738461A1 - Method of riveting by expansion - Google Patents

Abstract

Usage: mechanical engineering, mechanization and automation of assembly processes carried out by riveting. SUMMARY OF THE INVENTION: A package of parts with rivets installed in it is brought to the punches up to the stop with the specified force R. In the riveting process, the main expansion force is perceived by spherical joints of additional tons. P. f-ly, 2 ill.

Description

The invention relates to riveting and assembly work, in particular to riveting machines, and may find application in the mechanization and automation of assembly processes in which the assembly is carried out using a rivet joint.

The aim of the invention is to increase the kinematic accuracy as well as the quality of the rivet joint obtained while maintaining the high efficiency of the device.

Figure 1 shows the described device for group riveting by flaring, general view; figure 2 - view And figure 1.

The device contains a group mounted on the bed 1 parallel to the coordinates of the rivets 2 punches 3 connected by one ends through spherical hinges 4 to the pressure plate 5. The pressure plate 5 is connected to the drive 6 of plane-parallel movement by flexible plates 7, and to the bed through spherical hinges 8 , 9 main tubes 10 and additional tons 11. Spherical

the hinges 8, 9 are spherical sliding or rolling bearings; The spherical hinges 8, fixedly mounted on the thrust bars 10, are mounted in the frame with the possibility of movement in the direction of riveting. The spherical hinges 9 mounted in bars 11 are fixedly mounted on the axes of the bed 1 and the pressure plate 5. The lower working ends of the punches 3 are forcibly held along the coordinates of the flared rivets by the guide plate 12 connected by additional spherical hinges 8, 9 with the rims 10 and 11. To this end, the punches 3 are provided with spherical hinges 13 mounted in the guide plate 12. The spherical hinges 8 fixedly mounted on the thrust bars 10 are mounted in the guide plate 12 for movement in the direction of the riveting . The spherical hinges 9 are mounted on the axes of the guide plate 12 and, in order to compensate for possible manufacturing inaccuracies, have some movement.

one

00 00

4 o

in a plane perpendicular to the direction of riveting.

Geometrical dimensions of the device

And s soaked up so that -; - -; -,

where 11 is the distance between the centers of the extreme spherical hinges;

2 — distance from the center of the spherical hinge of the punch in the pressure plate to its working end;

h is the distance between the centers of the spherical hinges in the pressure and guide plates;

U is the distance between the centers of the spherical hinges of the punches in the pressure and guide plates.

The spherical hinges 13 in the guide plate 12 are mounted for movement in the riveting direction depending on the position of the upper spherical hinges 4. The position of the upper spherical hinges of the 4 punches is adjusted by means of a threaded joint, the above-mentioned aspect ratio remains unchanged.

The device has variants (not shown in the figures) that do not affect its performance, in which the spherical hinges 8 mounted on the thrust bars 10 are fixedly mounted in the guide plate 12 and mounted so that they can be moved in the direction of the riveting in the frame. 1 and pressure plate 5; the spherical hinges 8 are fixedly mounted in the bed 1 and mounted for movement in the direction of riveting in the pressure 5 and the guide 12 plates; the spherical hinges 9 mounted in the bars 11 are fixedly mounted on the axes of the pressure 5 and the guide 12 plates and mounted in the frame with the possibility of mutual movement in a plane perpendicular to the direction of riveting; The spherical hinges 9 fixedly mounted on the axes of the base 1 and the guide plate 12 are mounted in the pressure plate 5 with the possibility of mutual movement in a plane perpendicular to the direction of riveting.

The device works as follows.

The rivets 2 with the product are set in the lower position and are applied to the punches with a predetermined force P up to the stop. When each rivet is in contact with the punch, flaring is performed. The degree of flaring of each of the rivets can be changed if necessary.

moving the spherical hinges 4 punches 3.

In the riveting process, the main expansion force is perceived by spherical hinges of 9 tons of 11. Spherical hinges of 8 tons of 10 are loaded with components of the expansion forces directed in the plane of the force 5 and the guide 12 plates, and provide high kinematic accuracy of the device.

The drive b of the plane-parallel movement of the pressure plate can be either eccentric, as shown in the figures, or with the use of an epicyclic transmission, the transmission ratio of which is determined by the periodical fraction.

This device allows, while maintaining a low power density, spent on the implementation of the technological operation of flaring, i.e. high efficiency of the prototype, to improve its kinematic accuracy and due to this the quality of the rivet joint obtained.

Claims (2)

1. A device for group riveting by flaring, comprising a frame, a pressure plate and a guide plate, a group of parallel-installed punches connected by one ends through spherical hinges to a pressure plate, and the other ends by a guide plate, parallel bars connected by means of spherical hinges with the frame, guide and pressure plates, the drive of the plane-parallel movement of the pressure plate associated with the last flexible plate, additional parallel rods connecting the frame with the pressure plate plate, characterized in that, in order to improve the quality by improving the kinematic accuracy of the device, the additional parallel rods are made in the form of beams and are connected with the frame, the pressure plate, as well as the guide through spherical hinges, while the spherical hinges of the main parallel t g placed in the frame and the guide plate are mounted for movement in the direction of riveting, and the guide plate and the spherical hinges associated with it are extra t mounted for taking The same movement in a plane perpendicular to the direction of riveting. 2. The device according to claim 1, so that all spherical hinges of additional tg are made in the form of spherical rolling bearings. + L