SU1391776A1 - Method of connecting a rod with a flange - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to methods for permanently connecting parts of the rod-flange or plate type. The goal is to increase reliability by providing immobility of the connection and expanding technological capabilities. The connection of the rod (C) with the flange (F) 4, made of relatively soft metal, is made by pushing C into the hole of the flange. C contains a guide 1 and a deforming 2 parts with a notch (B) 3 between them. Profile C to B 3 is non-circular. The end face of the 2 C deforming part is made in the form of a reverse c at the base 3-5. At end F 4, an annular extrusion 5 is performed with a metal volume greater than the volume of the B 3 bore at C. When pushed into the hole C, it deforms the metal F 4, fills it with B 3 rods and forms a permanently fixed connection.2 Il., O

Description

(L

The invention relates to mechanical engineering, in particular to methods for permanently connecting parts of the rod-flange or plate type,

The purpose of the invention is to increase reliability by ensuring the immobility of the joint and expanding the technological possibilities by allowing the rods to be mounted in relatively thin flanges and plates.

FIG. 1 shows a scheme for the implementation of the proposed method; FIG. 2 shows section A-A in FIG. one.

A guide part 1 with a diameter D and a deforming part 2 with a diameter DJ, are made on the rod. A recess 3 is made between them. The rebar profile is not circular around the recess, and, for example, notched. The largest diameter of the gear profile is D,. The serrated profile is completed on the rod, for example, by knurling. The end of the deforming part of the rod is made in the form of a reverse cone with an angle at the base of 3-5 °.

In the flange 4, a hole with a diameter D is drilled. On the end portion of the flange, for example, a stamped annular protrusion 5 with a diameter Df is made such that the metal volume of this protrusion is greater than the undercut volume on the rod.

Ratios of diametral dimensions on the rod and on the flange are prescribed from the condition

D i DJ. D D Dj.

The diametral dimensions of the rod and flange are chosen from the conditions of good filling of the undercut with a deformable metal.

 D 0,9 D, Dj 0,9 D ,, - D: D i Di;

;

where D, is the diameter of the guide part

rod; D - diameter of the deforming part

rod i D - undercut diameter (notched

parts) rod / D4 - diameter of the flange hole, Df - outer diameter of the ring

flange flange.

The lengths of the torture 1 and the direction of the Common Part Ij are chosen from the condition

g

0

five

0 5

Q

five

0

five

0

equal strength and shear strength of the rod

1, V 1. 0,2D ,.

The height Ij of the flange's annular protrusion is equal to 1z (0.6-0.7) 1, provided that the volume of the protrusion metal is greater than the undercut volume on the rod.

Depending on the working conditions and in order to save metal, the rod connected to the flange can be solid or tubular.

The connection of the rod with the flange is carried out as follows. The rod is inserted with the guide part 1 into the hole of the flange L and is pushed under the action of the force R. When moving the end of the part 2 of the rod in the hole deforms the contact layers of the metal of the annular protrusion 5 of the flange. Under the action of a cone, the deformable metal reliably fills the recess 3 between the guide and the deforming parts of the rod and tightly compresses the gear part of the rod. At the same time, the deformable layers of the metal of the flange tightly compress the guide part 1 of the rod. As a result, the rod is securely connected to the flange.

Example. The combined axis of the gearbox, composed of a flange and a rod, serves as a shaft of the parasitic gear wheel of the timing mechanism in the engine of the T-130 tractor, while the flange prevents the shaft from falling out and is turned.

The flange has a rhombic shape with a total thickness of 14 mm. The initial billet is an aluminum casting with a protrusion with a height Ij of 2 mm and a diameter of 35 mm in Dy; in the center of the protrusion is a hole D of 31 mm. Before assembly, the hole is calibrated with an accuracy of H7.

A rod 140 mm long and 36 mm in diameter Di of steel 20 (may have a tubular shape) is processed on one side before being assembled and subjected to heat treatment. The length of the work piece is 12 mm. The diameter of the guide part D 31 h6 has a recess in the shape of a polyhedron with a maximum diameter of 28 mm DI. The polyhedron is machined on a thread grinding machine.

(The groove may also have a serrated shape, which will be knurled).

The face deforming part of the rod is conical with a angle at the base of 4 °.

The rod before connecting to the flange is oriented in a special device about

Pushing the rod through the hole in the flange is done on a press. When the press ram goes down, the end face of the deforming part of the rod deforms the contact layers of the metal of the flange's annular protrusion, causing the metal to flow into the recess of the rod, tightly grip it.

The pressing stroke is 2 mm, the speed is 12 m / min, the force is 8 tf.

As a result of pressing, a reliable fixed connection of the rod with the flange is obtained.

The use of the proposed method makes it possible to ensure the immobility of the connection of the rod with the flange not only in the axial direction, but also from mutual rotation around the axis under the effect of the torque, which in turn increases the reliability and durability of the connection.

In addition, the deforming part of the rod does not enter the hole, being located above the end part of the flange. This significantly reduces the length

rod, located in the hole, which allows connecting the rods of the proposed method with flanges of less

d 5

0

5 o

five

Claims (1)

Tol1 D1ny and expands the scope of use of the proposed method. The invention of the method of connecting the rod with a flange made of relatively soft metal, in which the rod containing the guide and deforming parts connected to one another through the recess is pushed into the hole formed in the flange and at the same time deforms it, filling the recess and forming a permanent connection characterized in that, in order to increase the reliability of the connection and the expansion of technological capabilities by providing. rod connections with relatively thin flanges, the rod profile in the undercut zone is non-circular, predominantly jagged, the end of the deforming part of the rod is inverted as a reverse cone; sizes of the rod and flange are chosen from the conditions D D5 - D g D j D,, where D is the diameter of the guide part of the rod; Dj - diameter of the deforming part of the rod} DJ - diameter of the undercut (gear part) of the rod D is the diameter of the hole of the flange; Df - the outer diameter of the annular protrusion of the flange. Editor V.Kovtun Compiled by N. Chernilevska Tehred L. Serdyukova Proofreader G. Reshetnik Order 1846/14 Circulation 709 VNIIPI USSR State Committee on inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, A / 5 Fick. 2 Subscription