SU1278101A1 - Riveting method - Google Patents

Abstract

The invention relates to riveting and assembly work. In order to reduce metal consumption in riveting, a rivet 9 is used with a mortise head 10 and an annular protrusion 11 at the opposite end. An annular groove 5 is made on the surface of the matrix facing the package of the parts to be connected. After punching the rivet 9, the holes in the package of the parts to be connected and the rivet in this hole fix the rivet by deforming it with the head adjacent to the hole of the package zone. When this happens, the material of the connected parts flows into the cavity formed by the rivet rod and its head and annular protrusion. 2 hp f-ly, 3 ill. (Lgo | CX)

Description

The invention relates to assembly works, and in particular to methods of riveting.

The invention relates to a reduction in metal intensity due to the exclusion of the use of each rivet for riveting the individual material remaining in the matrix package.

FIG. Figure 1 shows the connection elements before punching a hole in a package of riveted parts; pas figs. 2 - the resulting connection details; pas figs. 3 - rivet with annular conical section on the rod.

The method is carried out as follows.

A package of riveted parts 1 is installed on table 2 with a matrix 3, using a through hole 4 and a coaxial hole 5 coaxial with it, made on the 11th vertex of the matrix1, facing the worn section of the riveted parts. For the removal conditions from the matrix of the deformirosy package, the annular groove 5 is made with a conical side surface facing the package with a large base.

The package is compressed by means of a spring 6 and a clamp 7, after which a rivet 9 with a mortgage head 10 and an annular protrusion 11 on the opposite end, the diameter of which is smaller than the diameter of the hole 4 in the die, is inserted into the punch 8 located coaxially with the matrix. The rivet rod can be made with an annular conical section 12, located on the end adjacent to the annular protrusion 11 and facing the smaller base to the protrusion.

A rivet is applied to the inset head by a force that ensures the punching of the hole in the package of parts by the end of the rivet, while simultaneously inserting it into the formed hole.

Upon further impact of the rivet head, it is pressed into the package flush, and the head and the punch adjacent to the opening of the package are deformed, resulting in filling of the riveted parts formed by the rivet rod, head and annular protrusion with the material, and compression of the rod rivet, providing crepe rivets in the package.

Example. The film method is tested when a permanent joint is formed in a steel sheet steel package of Art. 3 bp 5, 14Г2 with a thickness of each of the parts 6, 8 and 10 mm. The total thickness of the package is 12, 16 and 20 mm. The dimensions of the top seals are as follows (Fig. 3): di is the rod diameter equal to 18.3 mm, dj, is the end face meter equal to 18.3 mm, dj is the smallest rod diameter equal to 17.3 mm, d. 1 - head diameter equal to 26 mm, hi - height of the copy part of the head, equal to 3 mm, hj. - the height of the cylindrical part of the head, equal to 2 mm, h, - the height of the end part of the rod, equal to 3 mm, h - the height of the conical part of the rod, equal to 10 mm, h5 - the total height of the rivet, is 25 mm.

The material of the rivet is steel 40X (from high-strength M24 bolt). The dimensions of the matrix (Fig. 1); DI: - hole diameter equal to 18.6 mm; DI - maximum diameter of the conical undercut equal to 27 mm; Dj - smallest diameter of the conical undercut equal to 24 mm; And - height of the conical undercut equal to 3 mm.

Riveting is performed on the press, as well as by means of a manual hydraulic jack with pressure control in the cylinder by a man-meter. For a package 16 mm thick, the force of pressing the package P 40 tf, the force of punching the hole and pressing in the rivet P varies depending on the movement of the rivet in the direction of the die.

The force Pi in the hole punching stage is 40-45 for steel 14Г2 and 25-30 for steel Art. 3, the installation force of the rod in the package is 35-40 and 20-25 ton-force, respectively, the force of pressing out the rivet 8 and 5 ton-force, respectively, the breaking force of the sample, 14.5 and 12.5 ton-force, respectively.

Claims (3)

1. A riveting method consisting in placing a package of riveted parts on a matrix with a hole riveted to the riveting axis, punching a rivet rod with a mortgage head into the package hole, installing the rivet in the receiving hole and then securing the rivet in the package, characterized in that metal consumption, at the rod end of the rivet opposite to the insertion head, an annular lead is preliminarily performed, an annular groove, p is performed on the surface of the matrix interfaced with the package of connecting parts. A coaxially arranged hole in the matrix, which is made with a diameter greater than the diameter of the annular protrusion, and the fastening of the rivet in the package is carried out by deforming the area of the package adjacent to the hole before being filled with the material of the parts to be connected, the cavity formed by the rivet rod, its head and the annular protrusion. 2. A method according to claim 1, characterized in that the rivet rods are provided with an annular copy section at the end adjacent to the annular protrusion, with the smaller base facing the annular protrusion. 3. A method according to claim 1, characterized in that the annular groove in the matrix is made with a conical lateral surface that is large in base to the package that rivets the washing parts. 3 W X 0 72 . J