RU2504697C1 - Part connection method - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: method for connection of parts via a through hole in them by inserting into the same hole with minimum possible gap of a connection element that is further subject to irradiation with a neutron flow.

EFFECT: simpler part connection process.

Description

The invention relates to machine and instrument engineering and can be applied when performing mechanical assembly work, in particular, when connecting parts with an interference fit and can be used to connect both metallic and non-metallic products, as well as to connect fragile and soft parts made of soft material, who are “afraid” of mechanical influences that are inevitable with mechanical riveting.

Known methods for connecting parts (rivets, screws, interference fit, glue rivets, glue-threaded), in which, to harden the connected parts before assembly, binder, hardening materials, such as galvanic coatings, adhesive joints, or polymeric, in particular anaerobic materials, are applied to the surface [1] p .98, [2] p. 78, [3] 116, 142.

The disadvantages of the known methods are that the materials are applied during the assembly of all joints made in accordance with a standard fit with interference. However, the tightness during one landing varies widely and their hardening is irrational due to the unreliability of the joints due to their weak work on uneven separation and vibration load, which imposes high demands on the design of joints and additional costs.

A known method of joining parts [4], in which the hardening of the connection, partially press-fit the parts with under-pressing to the final position by 0.3 ... 1.0 mm and subsequent pre-pressing under vacuum at a speed of 12 ... 900 m / min.

The disadvantage of this method is that it is difficult to implement, requires heating or cooling of the assembled parts, vacuum equipment and special press equipment.

There is a known method of joining parts [5], in which partial pressing of the parts is also carried out, then reinforcing the joint material is applied to the free sections of the joined surfaces of one or both parts, and then their subsequent pressing is carried out.

The disadvantage of this method is that it requires special press equipment equipped with a sensor of the pressing force of the assembled parts and the use of reinforcing material, when the pressing force T _ref does not correspond to the value of T _ref <T _shear , where T _shear is the maximum shear load, in addition to applying material and removing parts from the press equipment table, special devices are needed; possible large dispersion of the adhesion forces due to the dispersion of the actual landing dimensions within the tolerances and friction coefficients, as well as weakening of the landing and damage to the seating surfaces during disassembly of the connection.

The present invention solves the problem of creating compounds with the lowest cost and with a high degree of probability of non-destruction.

The technical result is to simplify the process of connecting parts, reducing costs and eliminating the conditions for their damage.

The specified technical result is achieved in that the parts are connected to the smallest possible gap through the through hole with a connecting element (for example, riveting), which is subjected to neutron irradiation, and the emitter is brought to a minimum distance to the connecting element, which leads to a "swelling" of the connecting element, which increases its volume and due to this, jamming of the connected parts occurs.

A feature of the proposed method for connecting parts through an opening is that the parts are connected by a connecting element inserted with the smallest possible gap, irradiated with neutrons, and the emitter is brought to a minimum distance to the connecting element in the range of emitted neutrons that fall into the metal, collide with nuclei ions or atoms, knock them out of the nodes of the crystal lattice, those, in turn, hit other ions and penetrate between the nodes crystalline th lattice, due to which it increases in volume and firmly connects parts.

The method is as follows. First, the process of drilling holes in the parts to be connected is performed. Then the connecting element is inserted without interference into the hole of the parts to be joined and its neutron irradiation is performed. During irradiation, neutrons enter the metal and, colliding with the nuclei of ions or atoms, knock them out of the nodes of the crystal lattice, which, in turn, hitting other ions, either remain in place or leave these places free. Most of the ions penetrate between the nodes of the crystal lattices. At the same time, the irradiated connecting element increases its volume by 0.3%, providing the density and strength of the connected parts.

The method can be used in mechanical engineering, in particular, for connecting rocket compartments used in conditions of alternating and vibrational loads.

LITERATURE

1. Design of all-wheel drive wheeled vehicles. T.3, ed. MSTU named after N.E. Bauman. 2008, p. 328.

2. Strength calculation in mechanical engineering. T.3, under the editorship of S.D. Ponomareva. M .: Mashgiz, 1959, S.-1114.

3. Guzenkov P.G. Machine parts. M .: Higher school. 1986.p.-358.

4. Voyachek II The use of anaerobic materials in the assembly of fixed joints of the shaft-sleeve type // Assembly in mechanical engineering, instrument making. - M., 2003, No. 9. - S.33-37.

5. RF patent No. 2357111, IPC F16 / B 4/00, B23P 11/02, B23P 19/02. The method of connecting parts with interference. Publ. 05/27/2009 Bull. No. 15.

Claims (1)

A method of connecting parts through a through hole in them by means of a connecting element inserted into this hole with the smallest possible clearance, characterized in that the connecting element is irradiated with a neutron flux.