RU1975U1 - INDUCTOR FOR DEFORMATION OF TUBULAR PREPARATION BY PULSE MAGNETIC FIELD ENERGY - Google Patents

Abstract

1. INDUCTOR FOR DEFORMATION OF TUBULAR PREPARATION BY PULSE MAGNETIC FIELD ENERGY, including a current-carrying spiral worn on a mandrel, characterized in that the inductor is made in the form of a non-conductive screw pair formed by a hollow cylinder and a stepped rod, in which there is an axial fluid in the feed channel , elastic, non-conductive sheath, dressed on one of the steps of the rod, and the current-carrying electrically insulated with elastic material spiral is made with a varying geometry of high-electric oprovodnogo having high elastic properties of the material and is arranged above the elastic non-conductive sheath, one end thereof is rigidly connected to the cylinder, and the other - with shtokom.2. The inductor according to claim 1, characterized in that the current-carrying spiral is made of beryllium bronze.

Description

 D7Sh deformation of the tubular billet pressure pulsed magnetic field

The invention relates to the field of metal forming and can be used in the manufacture of products from a barbed workpiece by pulsed magnetic field mainly in rocket and aircraft construction, in the design of surface and submarine vessels, in the chemical and nuclear industries and other technical fields.

Currently, for the manufacture of parts from tubular billets, a device is used for deforming the billets with a distributing safety device using pulsed magnetic field forces l.c, 3, which contain an inductor-In the form of a rigid non-conductive mandrel wound on. its surface is an electrically insulated spiral and a detachable matrix o -.....

However, the known devices have the following disadvantages:

- low relative degree of deformation of the workpiece (no more than 15., 18%} due to the fact that the process of deformation of the tubular workpiece is carried out for one | 1 1 © g, transition at high values of the discharge energy of the pulse current generator (30 .., 100 kJ) .This leads to a break in the material of the tubular workpiece in the deformation zone, low durability of the device.

Also known is an inductor for magnetic pulse stamping of parts 4J, comprising a complete housing made of an elastic material and filled with a fluid for transmitting pressure, mounted in the housing a current-carrying spiral of interwoven thin flexible conductors, end caps made of non-conductive material, as well as flexible coupling elements.

at 2It 20/14

When the die is stamped, they are inserted into the cavity of the tubular billet, then liquid is supplied under pressure into the cavity of the eductor body of the inductor. The inductor wall with a spiral under the pressure of the liquid is adjacent to the surface of the workpiece. When an impressive current flows through the spiral, electro-magnetic seeds arise that deform the workpiece at the first stage of deformation. Further, the pressure in the housing is increased. In this case, the inductor wall and the spiral change

form, thoroughly running to the surface of the codec rift.

After that, an impressive TQK is delivered to the inductor's driveway. Begins

second and subsequent stages of deformation

However, this inductor has a number of disadvantages:

- low technological capabilities when receiving children with a complicated form of a codec rift of increased depth, as well as bad materials from hard-to-deformed metaddas. may exceed 5-8% of the initial static state due to the occurrence of plastic deformations in thin flexible conductors;

-low efficiency and due to the fact that during the passage of the impulse-Blue current they stripped off the inductor, two and one of thin conductors intertwined by themselves, electromagnetic forces will appear that tend to mutually exclude each other;

-low resistance of the inductor due to the fact that the electromagnetic stamping process proceeds at high current frequencies

(50, .s 150 kHz). This circumstance leads to the heating of thin

interconnected flexible conductors, their fusion and welding ..,. The objective of the present invention is to increase the efficiency of the deformation process, the efficiency of the inductor, its durability and the expansion of technological capabilities. This object is achieved by the fact that the inductor for a magnetic pulse arm / seam of parts containing an elastic net conductive shell filled with liquid and a current-carrying spiral is made in the form of a non-conductive helical pair formed by a hollow cylinder and a stepped rod in which there is an axial channel , for supplying fluid to the toroidal elastic jacket, dressed on. one of the steps of the schanshan, and the current-carrying spiral is mounted above the elastic shell so that one of its ends is rigidly connected to the cylinder, and the other to the rod, and the current-carrying spiral has a variable cross section forming a spiral forming, close to the shape of the rift, which is obtained in workpiece using this inductor. This technical solution has the necessary inventive step, t, Ko, in the process of searching for the sources of patet and scientific and technical literature, it has not been discovered solutions that would possess the characteristics indicated in the distinctive part of the claims of the claimed invention. The essence of the invention is illustrated by the drawing, where in Fig.1 shows an inductor; Fig. 2 shows the initial position of the inductor and tubular billet before the start of the first stage of the deformation process; in Fig. 3, the position of the inductor and the tubular pre- / start before the start of the second (subsequent) stage of defrosting the annular rift along the detachable matrix; .on the. figure 4 - position of the inductor and the workpiece at the final stage of deformation (calibration); figure 5 - product obtained by deformation. tubular billet pressure pulsed magnetic field and indukt.

torus reduced initial state

The inductor for dbforirovaniya a tubular billet consists of a hollow non-conductive cylinder I, inside which there is a non-conductive stepped rod 2. The cylinder and rod are fixed from axial displacement by means of a thread made on the inner and outer surfaces of cylinder I and rod 2, respectively.

Stem 2 has an opening 3 for supplying fluid 4 (for example, industrial oil) under pressure Р to the cavity of the toroidal shell-5 made of elastic non-conductive material (for example, of a new rubber like thermoelectric grade :) :; Toroidal shell 5 is located between the rod 2 and the current-carrying spiral 6..The spiral has a variable cross-section, forming a longitudinal, forming, close to the shape of the rift obtained using this inductor. The spiral is made of highly conductive material with high elastic properties, for example, of diamond-free bronze and electrically insulated .elas. material 7, for example, urethane rubber.

The inductor is the main unit of the device for the deformation of the pipe blanks, which also contains a matrix 8:

-the site that provides rotation, axial movement and braking of the flask 2, including an electric motor 9, a clutch 10, a gearbox II, a hydromechanical clutch 12 and a brake 13;

-. site of creating working pressure in the toroidal shell of the inductor, including a hydraulic motor 14, an elastic connection of the shafts 15,

..

pump 16 and reservoir 17;

- a node for creating a pulsed current, including a pulse current generator 18, a current lead 19, a jumper 20 and a liquid contact 21 ..

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L I.

giving way.

A torque Mk is applied to a non-inert single rod 2, for example, using an electrode 9, a clutch 10, a gearbox II and a hydromechanical clutch 12, which provides rotation and axial movement of the rod 2 relative to the stationary cylinder I, while the axial size of the inductor 6 increases and the diameter decreases until the turns of the spiral 6 come into contact with the surface of the toroidal

shell 5.,. filled with liquid 4. Then, a tubular billet 22 is put on the inductor and the matrix 8 is installed. The torque Mk applied to the rod 2 is removed. In this case, cylinder I is fixed and does not rotate. The spiral 6 of the inductor, due to the elastic properties of the material from which it is made, begins to freely increase its diameter and decrease in length until it contacts the inner surface of the tubular workpiece 22,

After that, along the hydraulic line 3 in a non-conductive rod of one rod 2 in the hollow of the toroidal tube 5, filled with liquid 4, using a hydrometer 14 ,. the elastic connection of the shafts .15, the pump-16, the reservoir 17 and the hydromechanical coupling 12 create a pressure P in the cavity of the to.roid shell 5. At the same time, the elastic wall of the latter takes the form of the inner surface of the spiral coils and fits snugly to them.

i Then, the rod 2. is fixed from rotation and axial movement with the brake 13.-Further, the energy accumulated in the pulse current generator 18 by means of a current lead 19, a switching device 20 and a liquid circuit. 21 is fed to the inductor. Liquid contact 21 provides reliable connection, energy transfer and contact during axial and rotational movement of the end of the spiral 6

and conductor 19 When the pulse current passes through the conductor 19 between the inductor and the workpiece 22, electromagnetic

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forces that defor / align the workpiece along the split annular groove

mattresses 8 and the formation of an annular rift at the first stage of deformation |).

In this case, axial dynamic loads are transmitted through the turns of the spiral 6 to the ends of the non-conductive rod 2 and the cylinder. ..

RA I, the fixation of which from the @ @ th displacement is carried out using a thread made on the inner and outer surfaces of the cylinder I and rod 2. Radial dynamic loads are perceived by a toroidal shell 5, in the cavity of which there is a liquid 4 under pressure P. Moreover, the properties of the elastic material with which the spiral is electrically insulated. 6 of the inductor and from which the toroidal shell 5 is made, for example, urethane rubber, provide a low friction coefficient, high resistance to electromechanical and alternating loads p.1.1 both static and dynamic, temperature and wear resistance 5,

Then, in the cavity of the toroidal shell 5, the pressure P of the liquid 4 is removed, while the wall of the toroidal shell 5 takes its initial position. After that, the non-conductive rod 2 is rotated. Due to the elastic properties of the material, the coil 6 of the inductor freely increases its diameter and decreases in length, adjacent to the inner surface of the salt rift of the tubular blank 22. The first stage of deformation is completed. After that, c. if it is necessary to obtain deep rifts, the second (subsequent) stage of deformation begins (Fig. 3). .

At the final stage of deformation, the annular rift of the tubular billet 22 is calibrated using a split matrix 8 (fiGo4) o.

After the deformation of the tubular billet 22 and the calibration of the annular rift, the pressure of the liquid 4 in the toroidal strips

the shell 5 is removed, while the elastic wall of the toroidal shell 5 takes on its original shape and brakes the rod 2,

After that, a torque Mk is applied to the non-conductive rod 2, which ensures rotation and axial movement of the rod 2 relative to the non-conductive cylinder I. In this case, the axial size of the spiral 6 increases, and the diameter decreases until the turns of the spiral 6 come in contact with the surface of the toroidal shell 5, the device is restored to its original position (figure 5).

The half-matrix detachable matrix open and remove the part from the inductor.

The use of irrigation 7th inductor allows you to expand technological capabilities and increase the efficiency of the deformation process. Compared with existing devices, the proposed inductor can increase the relative degree of deformation of the workpiece by. 25 ... 30%, get the shape of an annular rift of increased depth, complex shape, get high-quality products from hard-to-deform metals, and also increase the durability of the inductor by 2-3 times.

In addition, when DOS-stage deformation of the annular rift on the surface of the tubular billet of the proposed inductor, in -. different from the known technical solutions, at each stage of deformation, 1-step-by-step changes in the microstructure of the material from which the workpiece is made occur. These. changes lead

to increase c. 2-4 times the strength characteristics of the product and the service life of the part.

-fO- f

Sources of information taken into account during the examination:

I. Patent 3888098 (United States, Electromagnetic Forming Device, CL 72-56 / B 21 d 26/14.

2o Patent 1342260 (USA) o Coil for electromagnetic molding. CLO B2I d, В26р.

3.Patent 279228 (USA). Device for electromagnetic molding. Ki 72-56 / B2I rf,

4.A.S. 344682 USSR, ЩИ В 21 1D20 / I4 Inductor for magnetic pulse stamping of parts / V.A. Gluschenkov, V.A. Kaskov (USSR) .. J 1406542 / 25-27 Declared. 11/02/1970 (prototype).

5.Politechnical dictionary. / Soviet Encyclopedia, 1977. S, 524

Applicant:

Vice Rector © NIR OMPY

Kuznetsov In "I4

Claims (2)

1. INDUCTOR FOR DEFORMATION OF TUBULAR PREPARATION BY PULSE MAGNETIC FIELD ENERGY, including a current-carrying spiral worn on a mandrel, characterized in that the inductor is made in the form of a non-conductive screw pair formed by a hollow cylinder and a stepped rod, in which there is an axial fluid in the feed channel , elastic, non-conductive sheath, dressed on one of the steps of the rod, and the current-carrying electrically insulated with elastic material spiral is made with a varying geometry of high-electric oprovodnogo having high elastic properties of the material and is arranged above the elastic non-conductive sheath, one end thereof is rigidly connected to the cylinder, and the other - with the rod.  2. The inductor according to claim 1, characterized in that the current-carrying spiral is made of beryllium bronze.