RU2465088C2 - Method of making inductor for magnetic pulse metal working and appliance for making said inductor by bending - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming using magnetic appliances. Conductive coil is shaped to solid flat blank with conductive plate paths. Holes and grooves are made in every plate between path and central bore to make arbitrary current lines extending over all plate contour. Extreme conductive plates are furnished with connection terminals arranged in parallel while adjacent plates are connected via jumpers to make current distributor. Said jumpers are bent radially at points equidistant from aligned axes of central holes. Then, conductive plate surfaces are electrically isolated so that their internal and external contours overlap and clamped to contact. Proposed appliance comprises foot to support board with recesses for fitting conductive plate, bending mechanism made up of ledge coupled with lever and articulated with foot strut, and cylindrical pin arranged in plate bending zone that has axis aligned with hinge axis and perpendicular to lever axis and diameter that allows jumper radial bending.

EFFECT: expanded performances.

2 cl, 2 dwg

Description

The present invention relates to technological equipment for processing pressure of cylindrical billets using magnetic means.

The main element of the inductor for magnetic pulse processing is an electrically conductive spiral, the effectiveness of which depends on its inductance, which is directly proportional to the number of turns of the spiral.

From the scientific and technical literature, pulse-type solenoids of the Bitter type are known, V. R. Karasik, “Physics and Engineering of Strong Magnetic Fields”, Moscow: Nauka, 1964, pp. 134-136, Fig. 54, containing a set of series-connected electrically connected metal disks having a radial cut from the inner hole to the periphery and insulated from each other by gaskets and disks, metal disks and insulation form a double helix with preliminary axial compression during assembly.

This design is inherent in the insufficient mechanical strength of the applied overhead insulation. This can be overcome by making rings of strong metal, however, stronger metals (for example, high-strength steel) have a higher electrical resistance, which leads to a decrease in the efficiency of the inductor, because part of the energy of the pulsed magnetic field goes to heat generation. In addition, heating the coil can reach temperatures that the insulation cannot withstand.

Another way to overcome this drawback is to increase the thickness of metal disks and insulation, which, in turn, will also lead to a decrease in efficiency and an increase in the size of the inductor.

A detachable crimping inductor is known from the patent literature, partially solving the above problems. It contains two rows of isolated half-turns electrically connected in series to a spatial spiral and made in the form of flat plates with insulation applied to them and protrusions for electrically connecting the plates into a spiral, and the plates of the first row are offset relative to the plates of the second row by the thickness of the plate with insulation applied to it and the protrusions of the plates of the first row are installed in contact with the protrusions of the plates of the second row (AS No. 1766559, B21D 26/14).

The spatial spiral arrangement proposed in this invention does not provide a sufficient contact area between the plates, referred to their thickness with insulation. This leads to a decrease in the density of turns along the length of the workpiece, which affects the density of the pulsed magnetic field and increases the amount of energy consumed.

The closest in technical essence to the proposed invention can be considered a method of manufacturing an inductor for magnetic pulse processing of metals, according to the application No. 2009117232 of 10.20.10, which decided to grant a patent.

In accordance with this solution, the electrically conductive spiral is made in the form of a single flat billet, which is formed so that they form the contours of the conductive plates, in each of which holes and grooves are made between the circuit and the central hole so that the conditional current line runs along the entire circuit of the plate, the extreme conductive plates are equipped with connection currents located parallel to each other, and adjacent ones are connected by jumpers, forming a conductive wire, bent in places of jumpers along fold lines, is equidistant th central axes of the holes coinciding with each other, then the working surface of conductive plates electrically isolate overlapping at their inner and outer contours and compressed to contact.

The electrically conductive spiral obtained by the proposed method is unreliable.

The problem to which the proposed technical solution is directed is to create a universal and effective multi-turn inductor.

The problem is solved in that in the method of manufacturing an inductor for magnetic pulse metal processing, in which the electrically conductive spiral is made in the form of a single flat billet, which is formed so that they form the contours of the conductive plates, in each of which holes are made between the circuit and the central hole and grooves so that the conditional line of currents runs along the entire circuit of the plate, the extreme conductive plates are equipped with connection currents located parallel to each other, and adjacent they are connected by jumpers, forming a current lead, bent in places of jumpers along fold lines equidistant from the axes of the central holes coinciding with each other, then the working surfaces of the conductive plates are electrically isolated with overlap along their internal and external contours and compressed until they touch each jumper to connect adjacent plates configured to provide a bending radius required for reliable operation of the inductor.

To solve this problem, a device for manufacturing an inductor is proposed, comprising a base with a plate fixed on it with recesses for installing a conductive plate, a bending mechanism made in the form of a shelf pivotally connected to a lever and mounted on a base stand with a recess for a conductive plate with a jumper, and a cylindrical a finger located in the bending zone of the jumper of the conductive plate having an axis coinciding with the axis of the hinge and perpendicular to the axis of the lever, and the diameter s bend radius jumper.

In Fig.1 shows a diagram of the inductor for magnetic pulse processing, Fig.2 is an electrically conductive spiral made in the form of a single flat workpiece, the conductive plate of which have, for example, a rectangular shape; figure 3 is a conductive spiral obtained as a result of bending in a special device, figure 4 is a special device for the manufacture of the inductor.

The main structural element of the inductor 1 for magnetic pulse processing is an electrically conductive spiral, which is made in the form of a series of conductive plates 3 ¹ , 3 ² , 3 ³ , 3 ⁴ , in the center of each plate there is a hole 4 and a radial slot 5, which in adjacent plates 3 ¹ , 3 ² are arranged with rotation by a predetermined angle around a single axis 6 of their central holes 4.

Conductive sections of adjacent plates 3 ¹ , 3 ² located on different sides of the radial gap 5 are electrically connected to each other.

The electrically conductive spiral 2 is made in the form of a single flat billet 8, which is formed so that they form the contours of the conductive plates 3 ¹ , 3 ² , 3 ³ , 3 ⁴ , the extreme ones of which, for example 3 ¹ , 3 ⁴ , are equipped with current leads 10 and 11, located parallel to each other, and adjacent 3 ¹ , 3 ^{2 are} connected by jumpers 12 in such a way that they receive a current lead.

Adjacent conductive plates 3 ¹ , 3 ^{2 of the} workpiece 8 are bent in places of the jumpers 12 along the fold lines 13 equidistant from the axes 6 of the Central holes 4.

In this case, the conductive plates 3 ¹ , 3 ² , 3 ³ , 3 ^{4 are} oriented so that the current outputs of the connection 10 and 11 are in the same plane, and the axis 6 of their central holes 4 coincide.

In each conductive plate 3 ¹ , 3 ² , 3 ³ , 3 ⁴ between its circuit and the Central hole 7, holes 14 and grooves 15 are made so that the conditional line of currents runs along the entire circuit of the plates 3 ¹ , 3 ² , 3 ³ , 3 ⁴ .

For the manufacture of the inductor, a design of the device is proposed, comprising a base 16 with a board 17 fixed on it with recesses 18 for installing one of the adjacent conductive plates, for example 3 ¹ .

The bending mechanism of a special device consists of a hinge 20 connected to a lever 19 and mounted on a rack 21 of the base 16 of a shelf 22 having a recess 23 for another adjacent conductive plate, for example 3 ² , and a cylindrical pin 24 located in the bending zone 13 of the jumpers 12 and having an axis 25 coinciding with the axis of the hinge 20 and perpendicular to the axis of the lever 19, and a diameter providing a radius of bending of the jumper.

Adjacent conductive plates 3 ¹ , 3 ² are installed: one in the recess 18 of the board 17, and the other in the recess 23 of the shelf 22, and are fixed in them.

Then, using the lever 19, the shelf 22 is rotated relative to the axis of the hinge 20 until it contacts the plate 17. In this case, the axes 6 of the central holes 4 of the conductive plates 3 ¹ , 3 ² are combined with each other, and the jumper 12 bends around the finger 24, while the diameter of the finger 24 provides a radius bending required for reliable operation of the inductor 1.

The applicant has verified the operability of inductors manufactured by the proposed method and using a special device in a wide range of sizes and shapes of conductive plates (round, square, rectangular, etc.), as well as using various conductive and insulating materials. In the process of testing their high efficiency is confirmed.

Using the proposed technical solution in the manufacture of inductor tooling for magnetic pulse processing of materials will allow:

- to produce highly efficient processing of parts of complex shape;

- to achieve the versatility of inductors when using them both for crimping and distribution operations;

- provide high adaptability while reducing cost.

Claims (2)

1. A method of manufacturing an inductor for magnetic pulse processing of metals, comprising making a conductive spiral in the form of a single flat billet, which is formed from conductive plates connected by jumpers, in each of which holes and grooves are made between its contour and the central hole so that the conditional current line passed along the entire circuit of the plate, the extreme conductive plates are equipped with connection current leads parallel to each other, the plates are bent in places of jumpers with alignment m of the axes of the central holes, then the working surfaces of the conductive plates are electrically isolated and squeezed into contact, characterized in that the plates are bent at the points of the jumpers using a bending mechanism with a cylindrical finger designed to bend around the radius with jumpers. 2. A device for manufacturing an inductor for magnetic pulse metal processing, comprising a base with a plate fixed thereon with recesses for installing one conductive plate, a bending mechanism made in the form of a hinge connected to a lever on a base of a shelf having a recess for another conductive plate connected to the said jumper and a cylindrical finger with an axis coinciding with the axis of the hinge and perpendicular to the axis of the lever, and located in the bending zone of the jumper to provide zmozhnosti his jumper rounding radially.

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