SU372281A1 - DEVICE FOR THERMOMAGNETIC TREATMENT OF MAGNETIC WIRES - Google Patents

Description

one

The invention relates to the field of heat treatment of magnetic circuits.

A device for thermomagnetic processing of magnetic cores is known, which includes a source of magnetic field, made in the form of a solenoid device, which is a hollow ceramic cylinder, on the external surface of which spiral current conductors, bases and jumpers are mounted. In the cavity of the cylinder there is a non-magnetic holder on which the processed magnetic cores are placed. When conducting a thermomagnetic treatment, the device with magnetic cores is placed in the working chamber of the furnace, the furnace is heated to a predetermined temperature, which makes it possible to carry out thermomagnetic treatment, after which a current of 100-150 A is passed through the solenoid device, creating a magnetic field. However, the current-carrying spirals operate at high temperatures, which creates the possibility of electrical breakdown, reduces the reliability of the device, and complicates its design. In addition, thermomagnetic processing using a known device can be carried out only in furnaces of a special design with built-in current leads.

In the proposed device, permanent magnets are applied as a source of magnetic field, in the working gap of which a holder with processed products is placed. The drawing shows the described device, front view.

The device consists of permanent magnets 1, a lower frame 2 and an upper frame 3, intended for closing the magnetic flux, cassettes for accommodating the magnetic cores 4, each of which includes a tube 5, a housing 6, a lower base 7, an upper base 5 and a handle 9.

Permanent magnets are made of magnetically hard magnetic alloy, magnet, bottom and

all upper parts made of magnet steel, all parts of cassettes and a handle of non-magnetic steel. The magnetic cores to be machined in the form of ring cores are put on the tube and fixed in a cassette, after which

The cassette is placed between the working poles of the magnets in such a way that the direction of the magnetic field coincides with the axis of the cores. After assembling the device, the magnets, lower and upper rmo and to be processed

The magnetic cores form a closed magnetic circuit with a minimum air gap between the magnets and the magnetic cores, which prevent the magnetic circuit from being squeezed. Then the device is placed in the working chamber of the furnace. In the process of heat treatment, according to a given mode of the magnetic circuit, they are under the influence of a magnetic field of permanent magnets, the direction of which is perpendicular to the direction of the subsequent magnetization of the magnetic circuits. As a result of such processing, a magnetic texture is created in the magnetic cores, in which the magnetic domains are mainly oriented in the direction of the applied field. The presence of such a texture results in the magnetization process being carried out mainly by the mechanism of reversible rotation of the vectors, which results in a decrease in the residual induction of the linearization of the magnetization curve.

Subject invention

Claims (2)

1. Device for thermomagnetic processing of magnetic cores made of magnetic materials in a transverse magnetic field, containing a source of magnetic field, a closing rom and a nonmagnetic holder for the processed magnetic cores, characterized in that, in order to increase reliability, reduce the cost of equipment and electricity and process in standard furnaces, the source of the magnetic field is made in the form of permanent magnets made of alloys, which retain the properties of magnetically hard materials at a rate of tures thermomagnetic treatment, in the working gap which is situated nonmagnetic holder magnetic cores to be handled. 2. A device according to claim 1, characterized in that the permanent magnets are made of magnico-type alloys. Uh