SU1421778A1 - Device for thermomagnetic treatment of articles - Google Patents

Abstract

The invention relates to a tooling for the thermomagnetic processing of permanent magnets and can be used in mechanical engineering as a container for housing and subsequent heat treatment of products in tunnel-type furnaces. A device consisting of external (containers) and internal (bath) parts is proposed. The purpose of the invention is to provide equal heating and cooling rates in terms of volume with a high degree of accuracy under conditions of continuous movement. A distinctive feature is the presence of a guide and a window at the ends of the container and an additional bath consisting of several identical sections separated by air gaps and connected by slats. The use of the device allows one to maintain a uniform in volume rate of temperature change with an accuracy of 1 ± 0.5 C / min. This should lead to an increase in productivity and an increase in yield by 20-30%. 1 hp ff, 3 ill. but

Description

The invention relates to a tooling for the thermomagnetic treatment of permanent magnets and can be used in various parts of the mechanical engineering industry as a container for placing products in a furnace and subsequent heat treatment of tunnel-type tunnel furnaces.

The purpose of the invention is to provide equal throughout the volume of the charge of cooling and heating of products with a high degree of accuracy under conditions of uninterrupted movement in a continuous furnace.

The device is made of two detachable parts; the inner part — the bath is made of a separate compartment (Fig. 1, 3) consists of separate sections 6 of equal volume interconnected by two strips 7. Sections 6 are loaded with magnets 8, spaced one from another at the same distance, and separated by air gaps 9 .

The device works as follows

in a way.

Before the thermomagnetic treatment, in each section 6 from above, magnets 8 are placed in two rows and in two layers from above. Then the bath 5 through window 4

loading the container into the container 1. The fixture is installed on the fur pad: - the horizontal movement plate (not shown) so that the guide protrusion 3 is located with

rectangular sections of the same 20th row of the movement mechanism, volume interconnected with the torch. When the horizontal mechanism is switched on with a jumper. The sections are separated by the same air gaps and are at the same distance from the upper and lower parts of the jumper, which is. provides a uniform temperature in the volume of the entire tank and the ability to control the cooling rate and Hai-rove with high precision,

 The outer part of the vtollen is in the form of an all-welded box, on one side of the end part of which the plate moves abutted against the guide protrusion and moves the device along the guides into the loading window of the tunnel-type furnace, after which the bar moves back to its original position. Then the next device is installed, the pusher moves the second

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the fixture until the fixture window enters the self-centering protrusion of the first fixture and moves it to the heating zone of the passage furnace, etc., In the heating zone of the furnace, the shell 2 of the container 1 is first heated, and due to its thermal conductivity, spreads evenly around the contour of the container. From the heat radiation from the container shell and due to the heat transferred from the heaters by convection, uniform heating or cooling of each section 6 with magnets 8 occurs, since they have the same

guide for connecting dock and container joints, on the other hand, windows for loading trays and entry of guide for j to ensure 40

the fixture until the fixture window enters the self-centering protrusion of the first fixture and moves it to the heating zone of the passage furnace, etc, The entire contour of the container spreads evenly. From heat radiation from the container shell and due to the heat transferring from heaters by convection, each section 6 is uniformly heated or cooled with magnets 8, since they have the same

reliable connection of the containers and excludes their mutual displacement relative to each other when moving in t-type tunnel kiln furnaces; in addition, 5 all-welded solid container body that covers sections of the trays with mag-volume and mass on all sides, as well as - by filaments, due to thermal conductivity, splices between them. This creates the need for overheating of the products from the heated conditions for regulating the heaters of the walk-through furnace, which helps to cool the magnets with a high temperature of the products in the bath.

Figure 1 shows the device under conditions of continuous movement in a continuous furnace, a general view; on

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accuracy.

Comparative tests of the proposed and well-known technical solutions were carried out with the thermomagnetic treatment of magnets and a tunnel furnace of the PNTMO-1 type. 1, Thermal boundary cycle - container; Fig. 3 shows the internal processing of permanent magnets placed on a part of the device in the devices under test.

The container 1 consists of a metal shell 2 (fig. 2) of the guide protrusion 3 and the window 4, the bath 5

included heating up to 720 C, shutter speed 15 20 min, cooling in a magnetic field from 700 to 560 C with a speed of I C / MHH

In order to move the bar, the bar abuts the guide protrusion and moves the device along the guides to the loading window of the tunnel-type tunnel kiln, after which the bar moves back to its original position. Then the next device is installed, the pusher moves the second

the fixture until the fixture window enters the self-centering protrusion of the first fixture and moves it to the heating zone of the walk-through furnace and, in the heating zone; The furnace is first heated by the shell 2 of the container 1, and, due to its thermal conductivity, the heating spreads evenly over the entire contour of the container. From the heat radiation from the container shell and due to the heat transferred from the heaters by convection, uniform heating or cooling of each section 6 with magnets 8 occurs, since they have the same

volume and mass, as well as air gaps between them. This creates the necessary conditions for controlling the rate of cooling of magnets with high

volume and mass, as well as air gaps between them. This creates the necessary conditions for controlling the rate of cooling of magnets with high

accuracy.

Comparative tests of the proposed and well-known technical solutions were carried out with the thermomagnetic treatment of magnets and a tunnel furnace of the PNTMO-1 type. A heat treatment cycle for permanent magnets placed in the tested devices.

included heating up to 720 C, exposure 15-20 minutes, cooling in a magnetic field from 700 to 560 C with a speed of I C / MHH

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with their subsequent unloading and cooling to room temperature outside the magnetic field. The entire processing cycle is carried out under the conditions of continuous movement of devices in the tunnel-type furnace of the continuous type.

The tests carried out showed the technical and economic advantages of the proposed technical solution in comparison with limestone.

The proposed device allows for precision machining of magnets with high accuracy, equal to liOjS C / MHH in conditions of continuous movement of products. The known device does not allow regulating the cooling of products at a given speed and does not ensure their continuous movement in tunnel electric furnaces due to their design features.

  -

The use of the invention ensures the mechanization and automation of the process of thermomagnetic processing of precision magnetic alloys of the type Fe-Cr-Co, which are sensitive to the cooling rate in

eight.

magnetic field, which increases the equipment performance by 6 times and ensures uniform temperature of the products in the bath. This leads to improved stability of the magnetic properties and an increase in the yield of magnets by .0-30%.

Formula of invention

Claims (2)

1. A device for thermomagnetic processing of products, containing a container, made in the form of interconnected shells and bottom, characterized in that, in order to ensure equal heating and cooling rates in terms of the volume of the charge, movement in the entrance furnace, it additionally contains a bath consisting of separate, equal in size to sections, separated by equal air gaps, and placed inside the container, and the bottom of the shell is fastened with a guide lug. . 2. Device according to claim 1, about t l and in that the sections of the van are interconnected by slats.  / Xx // xvoo x x uz.l g L  f L 7 jr: ff if ff f f f fy fffffff IG Editor V.Danko Compiled by V.S., adchikov Tehred M. KhodanychKorrektor A.Obruchar "2.J