DE2209048A1 - Vacuum arc furnace - Google Patents

Description

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1. Sergej Georgievic Glazunov, Moscow / USSR

2. Il'ja Aleksandrovic Zicharev, Balasicha / USSR

3. Dmitrij Aleksandrovic Filippov, Moscow / USSR

4. Pavel Vladimirovic Norin, Moscow / USSR

5. Viktor Iyanovic Zasul'skij, Hoskau / USSR

6. Konstantin Konstantinovic Jasinskij, Moscow / USSR

7. Aleksej Michajlovic Chromov, Moscow / USSR

8. Illarion Afanas'eyic Prostov, Moscow / USSR

9. Änatolij Sergeevic Romanov, Moscow / USSR

10. Aleksej Michajlovic Ivanov, Moscow / USSR

11. Elena Arkad'evna Kasina, Bulatnikovo / USSR

12. Nina Sergeevna Gorina-Valeeva, Moscow / USSR ρ * q gqzi / p

13. Michail Pavlovic Kulesov, Rzev / USSR ^ v / *

14. Pavel Ivanovic Smirnov, Rzev / USSR February 25, 1972

15. Vjaceslav Alekseevifi Nikolaev, Moscow / USSR _L / _Br

16. Igor 'Borisovic Krjuckov, Moscow / USSR

17. Veniamin Vladimirovic Musatov, Moscow / USSR

18. Vlaerij Moiseevic Moldavskij, Moscow / USSR 19 · Leonid Alekoandrovic Chruscevic, Moscow / USSR

20. Vladimir Il'ic Nekrasov, Moscow / USSR

21. Galina Fedorovna Ljapina, Moscow / USSR

22. Nikola j Andr.eevic Fedoseev, Moscow / USSR

VACUUM ARC FURNACE The invention relates to vacuum arc furnace for

Melting chemically active metals with subsequent pouring into the molds of a centrifugal casting machine, to obtain thin-walled cast products

It is a vacuum arc furnace for melting chemically active metal and then feeding it into the Forms of the centrifugal casting machine known, which is mounted on a chassis. In this furnace there are

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chamber a crucible and a consuming electrode. The melting chamber is separated by sealing closures from the second chamber with the centrifugal casting machine located below it. These The second chamber with the centrifugal casting machine is mounted on a driven chassis and can be placed on screens in be moved horizontally.

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Since the centrifugal casting machine is mounted on the chassis and not on a fixed foundation, your Operate strong vibrations which destroy the molds, resulting in poor quality castings can be obtained. The table with the molds is rigidly attached to the shaft of the centrifugal casting machine and is far from the crucible removed additional equipment, for example in the form of a gutter and a funnel, is used. This makes what natural it is undesirable that the metal has cooled down and becomes less fluid. The consequence of this is that it is difficult in such Furnace to obtain high quality thin-walled castings.

It is the aim of the present invention to remedy the above Eliminate disadvantages.

The invention has for its object to provide a vacuum furnace for the manufacture of metal products, the has a higher throughput and ensures the preservation of thin-walled cast products of higher quality.

This object is achieved a vacuum arc furnace for centrifugal casting of metal products by providing that contained a vacuum chamber having consume hd ". \ R electrode and a crucible for collecting the liquid metal as well as under the ^ chamber on a driven chassis mounted chamber of rlüssigen for distributing Metal on molds that are made on the centrifugal casting

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are placed on the machine table, in which the centrifugal casting machine is set up in a stationary manner according to the invention and one Drive for vertical displacement of the removable table has, which is located in the chamber for distributing the Liquid metal is located and can be moved together with this isi, whereby the chamber is sealed on the top and bottom by closures,

Such an oven enables its useful throughput time to be achieved by quickly changing the chamber used for distributing of the liquid metal on the forms is intended to extend. In addition, the fixed installation makes the Centrifugal casting machine makes this more stable and prevents the occurrence of vibrations that occur with a non-rigid attachment possible are.

Appropriately, in the centrifugal casting machine, the drive that serves as the frame is used as the drive for the table displacement Hydraulic cylinder used, the piston rod of which serves as a quill through which the spindle is passed, which holds the table and transfers the rotary motion generated by the motor to it.

This enables the table with the casting molds placed on it to be moved in a vertical direction and consequently the auxiliary equipment consisting, for example, of a gutter, is superfluous, as a result of which the metal is cooled down less and is splashed.

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Will be beneficial in the chamber for distributing

Liquid metal centering bars are provided to hold the table in place when it is connected to the centrifugal caster spindle is released and it is then relocated together with this chamber.

These seals provided prevent the centrifugal caster table when moving out and when returning the same together with the chamber for distributing the liquid metal is moved. This ensures a reliable connection between the spindle and the table of the centrifugal casting machine «

The centrifugal casting machine is expediently deeper than the chamber for distributing the liquid metal onto the molds set up

In this case, which is sufficiently simple from a structural point of view, there is no need to transport the centrifugal casting machine and it does not interfere with the conveyance of the chamber with the table and the molds.

The following is an export to explain the invention: Example of the vacuum furnace with reference to the enclosed i Drawings described shows

Fig. 1 shows the vacuum arc furnace with a partially cut side wall and

2 the same vacuum arc furnace with separated from it;

the chamber for distributing the liquid metal, the table; is in the chamber.

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The vacuum furnace for SchBudergießen of metal products has a vacuum chamber 1 (Fig. 1 and 2) with consuming Electrode 2 and crucible 3 for extracting liquid metal as well a chamber 5 located below the chamber and mounted on the driven chassis 4 for distributing the liquid metal on molds 6, which are placed on the table 7 of the centrifugal casting machine 8 »

The centrifugal casting machine 8 is set up stationary and therefore, no vibrations are from her on the chambers 1 and 5 of the vacuum arc furnace and on the molds 6, which are placed on the table 7 of the centrifugal casting machine 8, transferred. For moving the table 7 in the vertical direction serves a drive 9 »which consists of a hydraulic cylinder 10 serving as a frame and a piston rod 11, which is used as a The quill serves and through which the spindle 12 is guided, which; holds the table and stops the rotary motion generated by motor 13; transmits him. The connection between the table 7 and the spindle 12 can consist of a projection and recess, the The protrusion on one and the recess in the other of the parts to be connected are made *

The chamber 5 for distributing the liquid metal on the Forms 6, which are placed on the table 7, have closures 14 and 15 and latches 16, which ' center the table 7 and hold it after loosening it from the spindle of the centrifugal casting machine 8

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To seal the chamber 1, a vacuum seal 17 is built into its bottom.

Under the chamber 5 for distributing the liquid metal is the bottom 18, which is used to press the mentioned chamber 5 against the end face of the chamber 1 and to reliably seal the entire furnace during the furnace cycle with the aid of Seals 19 is used.

In the bottom 18 there is an opening for the passage the spindle 12 of the centrifugal casting machine 8 in order to subsequently connect the spindle 12 to the table 7ι which the molds 6 wears to enable. In the opening of the bottom 18 there is a vacuum cover (not shown in the drawing).

Serve for pumping air out of the vacuum arc furnace ' Nozzle 20 in the vacuum chamber 1 and nozzle 21 in the bottom 18.

The vacuum arc furnace works as follows. j

themselves. ·

The consuming electrode 2 is placed in the vacuum chamber 1;

out of which the weight off for performing multiple melting I ranges. Under the vacuum chamber 1, the chamber 5 with the table 7 and the molds 6 placed on it is placed in order to pour metal into these molds and to obtain the desired products. The chambers 1 and 5 are connected in an airtight manner and the bottom 18 is pressed against them, after which air is pumped out from the entire furnace chamber via the nozzles 20 and 21, which are connected to the vacuum system (not shown in the drawing) switched on and off the

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Hydraulic cylinders 10 become the piston and the spindle 12 of the centrifugal casting machine 8 in the direction of the removable table 7 pushed out upwards. The locking device (not shown in the drawing) with a projection in the upper part the spindle 12 engages in the opening in the lower part of the table, the spindle and the table are connected to one another and the drive 9 lifts the table 7 with the molds 6 into the predetermined position Height.

In, located in the vacuum chamber 1, the crucible 3 is . consuming electrode 2 melted. At the same time, the motor 13 of the centrifugal casting machine 8, which sets the table 7 in rotation, is switched on.

After the required amount of liquid in the crucible 3 Metal is obtained, the latter is poured into the molds 6, which are placed on the table 7 of the centrifugal casting machine 8 are.

After the molds are filled with metal, the shutter 17 is closed, which the vacuum chamber 1 from the chamber 5 separates, which is also covered by the upper vacuum seal

Here, electrode 2 and crucible 3 are in the heated one State. The revolving movement of the removable table 7 is ended and it is lowered onto the centering bar 16, which are designed in the form of support arms. The piston rod 11 of the hydraulic cylinder 10 of the centrifugal

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The casting machine 8 continues its downward movement, it will its connection with the table 7 is released and it is lowered so far that it is in the bar of the hydraulic cylinder 10 is retracted and (does not) prevent the lower lock 15 / öaran, to cover the chamber 5 from below.

The chamber 5 is separated from the furnace and moved out, while in its place the next, a similar table 7 with molds 6, which are used for pouring liquid metal are prepared, is placed in the chamber.

The work cycle is repeated until the entire electrode 2 is used up operated from the control panel.

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Claims (3)

PATENT APPLICATIONS ρ 39 89V2 Feb 25, 1972 O vacuum arc of s for centrifugal casting of metal "sick products of a vacuum chamber having consumable electrode one and a crucible for extracting liquid metal and a chamber mounted on a driven chassis and located under the chamber for distributing the liquid metal on molds placed on the centrifugal casting machine table, characterized in that the centrifugal casting machine (8). fixed is erected and has a drive (9) for vertical displacement of the Tischeös removably carried out (7), which is located in the chamber (5) for distributing the liquid metal and which is displaceable together with the latter, said chamber (5) on the The top and bottom are sealed by closures (14) and (15). 2. Vacuum arc furnace according to claim 1, characterized in that the centrifugal casting machine (8) a hydraulic cylinder (10) serving as a frame is used as the drive (9) for moving the table (7), whose piston rod (11) serves as a quill through which a spindle (12) is guided, which holds the table (7) and which one
from the motor (13) generated rotary movement transfers to him. 3. Vacuum arc furnace according to claim 1, characterized characterized in that in the chamber (5) for ver i parts of the liquid metal centering bars (16) are provided, dre the table held in place when its connection with the spindle 209882 ^ 0551 (12) the centrifugal casting machine (δ) is solved and he afterwards is relocated together with this chamber (5). 4 ·. Vacuum light fcogenof en according to claim 1, characterized characterized in that the centrifugal casting machine (8) is deeper than the chamber (5) for distributing the liquid metal is set up on the forms (6). 209882 ^ 0551