JP2745595B2 - Electroslag remelting equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an electroslag remelting device having an improved electrode lifting device.

Conventional technology Electroslag remelting (hereinafter referred to as ESR) method,
Due to its many advantages, various studies have recently been conducted as a special melting method for metallic materials, and an electroslag remelting apparatus having two electrode masts is often used. In an electroslag remelting apparatus having two electrode masts, after the consumable electrode supported by one electrode mast is consumed, the electrode mast is moved to a standby position, and the other electrode mast is used. It moves to the position and performs ESR operation. Conventionally, in such an electroslag remelting apparatus having two electrode masts, a water-cooled cable has been used to supply current to a consumable electrode supported by the electrode masts. That is, a water-cooled cable is connected to a portion that grips the upper portion of the consumable electrode, and the consumable electrode can be moved up and down and turned by connecting to a power supply.

Problems to be Solved by the Invention By the way, in the ESR method, it is necessary to supply a large current to the consumable electrode, but in order to make the water-cooled cable flexible, it is necessary to form the cable with a thin wire. When a large current flows through the cable, the resistance of the cable increases,
There is a problem in power efficiency due to the large impedance. Further, since the water-cooled cable hangs down from the upper part, there is also a problem that the water-cooled cable hinders the turning operation of the consumable electrode.

The present invention has been made in view of the above-described problems in the related art.

Accordingly, it is an object of the present invention to provide an ESR device capable of efficiently raising and lowering and turning a consumable electrode with power.

Means for Solving the Problems The present invention provides an ESR device having at least two electrode masts provided with an electrode lifting / lowering device and at least one mold, in which a power supply pole is disposed on the electrode mast, and a slide contact is provided on the power supply pole. Slidably in contact with the
The electrode lifting device is provided with an electrode gripping means so as to be pivotable about a pivot axis, and a rotary contactor is mounted above the pivot axis, and the consumable electrode, the rotary contactor and the slide contactor are electrically connected. It is characterized by.

The ESR device of the present invention will be described with reference to FIG. 1 corresponding to the embodiment.
It has at least two electrode masts with zeros and at least one mold 20. A feed pole 31 is provided on the electrode mast, and a slide contactor 40 is slidably pressed against the feed pole.
In the electrode lifting / lowering device, an electrode gripping means 50 is provided so as to be rotatable about a rotating shaft 15, and a rotating contactor 60 is mounted above the rotating shaft 15. Electrode holding means
The consumable electrode 70 held by 50, the rotary contactor 60, and the slide contactor 40 are electrically connected, and are configured so that current flows from the power supply pole 31 to the consumable electrode 70.

In order to obtain an ingot by the ESR device, an electric current is applied to the consumable electrode, the consumable electrode is melted by the Joule heat of the molten slag, and the solidified layer is solidified in the mold 20. The means must be moved downward by the electrode lifting device. ESR of the present invention
In the apparatus, the electrode gripping means 50 is moved downward by the electrode lifting / lowering device in one electrode mast to form an ingot. In this case, the current applied to the consumable electrode 70 is supplied from the power supply pole 31 to the slide contactor. After passing through 40 and the rotating contactor 60, it flows to the stinger rod 52 provided at the tip of the electrode gripping means 5, and reaches the consumable electrode 70. After the consumable electrode has been consumed, the electrode gripping means is raised, turned and moved to the standby position in order to grip a new consumable electrode. On the other hand, the consumable electrode gripped by the electrode gripping means of another electrode mast having the same configuration as described above is swiveled above the mold 20 to perform the same operation as described above. Since the ESR device of the present invention uses the slide contactor and the rotating contactor as described above, a large current can be supplied to the consumable electrode without using a water-cooled cable as in the conventional ESR device.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. First
The figure is a side view of the ESR device of the present invention, and FIG. 2 is a front view.

In the figure, A is a first electrode mast, B is a second electrode mast, and the details will be described below with respect to the first electrode mast. These electrode masts have the same structure. doing. The electrode mast is provided with an electrode lifting / lowering device 10 for supplying power to the consumable electrode.
31 are arranged.

The electrode lifting device 10 includes a ball screw 12 that is rotated by a driving device 11 and an lifting device 14 that moves up and down along a column 13 by its action. A turning shaft 15 that is turned by a turning motor (not shown) is attached to the electrode lifting device, and the electrode holding means 50 is connected to the turning shaft 15.

The electrode gripping means 50 is composed of a revolving arm 51 and a stinger rod 52 disposed at the tip thereof, and grips the consumable electrode 70. Above the turning shaft 15, a rotary contactor 60 is mounted. A slide contactor 40 is slidably pressed against the power supply pole 31.

The slide contactor 40 is electrically connected to the rotary contactor 60 via a connector 33 by a connection power supply plate 32, and is connected to the elevating device 14 so as to move up and down in conjunction with the elevating. Further, the rotating contactor 60 is electrically connected to the stinger rod 52 via the connector 34 by the connection power supply plate 35. 37 is an upper feed pole for the current flowing through the mold and the ingot.

20 is a mold. Reference numeral 81 denotes a cart, which is configured to be able to move on a rail by wheels 82, and supports the mold 20 by a support frame 83. The lower electrode poles 37 and 37 and the ingot pulling device 84 are disposed on the carriage. The ingot pulling device 84 is a ball screw
By the action of 87, it is possible to move up and down along the column 85. Reference numeral 86 denotes a slide contactor connected to the ingot pulling device 84, which is configured to slide on the lower electrode pole 37 by the movement of the ingot pulling device 84.

FIG. 2 shows a two-mould type ESR device provided with two carriages having the same structure as described above.

A case where an ESR operation is performed using the above ESR device will be described. Move one of the carts 81 to the ESR operating position,
The lower electrode pole 37 is connected to the upper electrode pole. The consumable electrode 70 is gripped by the stinger rod 52, inserted into the mold 20 while supplying power, and the melting operation is performed while the elevating device 14 is lowered in accordance with the consumption of the consumable electrode. On the other hand, the formed ingot 90 is pulled downward from the lower part of the mold by the ingot pulling device 84.

When the consumable electrode 70 is worn, the swivel arm is turned to the standby position, and the swivel arm at the standby position holding the new consumable electrode of the other electrode mast B is swung to move the consumable electrode into the mold 20. And continue the ESR operation. If the ingot has reached a certain length, a new bogie is
Move to ESR operation position and continue operation.

In the above case, the current is
Supplied to the connecting conductive plate 32 from the slide contactor 40.
, And reaches the rotating contactor 60, further reaches the steinger rod 52 via the connecting conductive plate 35, and is supplied to the consumable electrode 70. The current supplied to the consumable electrode 70 flows from the ingot to the lower feeding pole via the slide contactor 86,
Next, the power reaches the power supply (not shown) from the upper power supply pole.

Next, the slide contactor and the rotating contactor used in the above ESR device will be described.

FIG. 3 is a plan view of the slide contactor 40, and FIG. 4 is a side view thereof.

The slide contactor 40 includes a plurality of support shafts 41 provided with the power supply pole interposed therebetween, a rotary slider 42 rotatably provided on the support shaft, and a fixed contact device mounted on the support frame 43.
44, and a plurality of rotary contacts 45 disposed between the rotary slider 42 and the fixed contact 44. Each rotating contact 45
Is a rotary slider 42 and a fixed contact
It is pressed against 44. Reference numeral 47 denotes a connector for electrically connecting to the connection power supply plate 32, which is electrically connected to each fixed contact.

FIG. 5 is a plan view showing a partial sectional view of the rotary contactor 60, and FIG. 6 is a sectional view of FIG.

The rotating contactor 60 includes a fixed plate 62 having a fixed contact 64.
, A rotating plate 61 having fixed contacts 63, a plurality of rotating contacts 66 disposed therebetween, and a support shaft 65. The fixing plate 62 is mounted on the elevating device by the connecting tool 16,
The support shaft 65 is mounted so as to be coaxial with the turning shaft 15, and the connector 33 is fixedly attached. On the other hand, the rotating plate 61 is fixed to a support shaft 65, and the support shaft is inserted into a bearing 69 attached to the fixed plate, and is rotatable by the action of a bearing 68.
A spring 67 is attached to each rotary contact 66,
The rotary contact 66 is disposed so as to press against the fixed contacts 63 and 64.

The path through which current flows in the slide contactor and the rotary contactor will be described. When the slide contactor 40 moves up and down on the power supply pole 31, the rotary sliders 42, 42 disposed with the power supply pole interposed therebetween rotate, and the rotary contacts 45 rotate accordingly. Since each rotary contact 45 is pressed against the rotary slider and the fixed contact by a spring 46, the current from the power supply pole is reduced by the rotary slider 42,
It flows to the fixed contact 44 via the rotary contact 45. The current from the fixed contact is collected on the connection plate 47, and the connection power supply plate 32,
Via the connector 33, it flows to the fixed plate 62 of the rotary contactor 60.

The current flowing through the fixed plate 62 flows from the fixed contact 64 through the rotary contact 66 to the fixed contact 63 of the rotary plate 61, and passes through the connector 34 attached to the rotary plate 61 and the coupling power supply plate 35, and the stinger. Flows on rod 52. When the turning arm 51 is turned, the rotating plate 61 rotates in synchronization with the turning motion of the turning arm, but a rotating contact 66 is provided between the rotating plate 61 and the fixed plate 62.
, The current flows stably due to the rotational movement of the rotary contact.

In the present invention, a large current is required because the slide contactor and the rotary contactor are used as described above.
The impedance is reduced in the ESR device, and the power efficiency is improved.

Effect of the Invention As described above, the ESR device of the present invention uses the slide contactor and the rotating contactor, so that a large current can be supplied to the consumable electrode without using a water-cooled cable as in the conventional ESR device. it can. Therefore, the impedance is reduced and the power efficiency is improved as compared with the case where a conventional water-cooled cable is used. Further, since the water-cooled cable does not hang down from the upper part, the ESR device becomes compact, and troubles do not occur when the consumable electrode is lifted, lowered and turned.

[Brief description of the drawings]

FIG. 1 is a schematic side view of one embodiment of the ESR device of the present invention, FIG. 2 is a schematic front view of one embodiment of the ESR device of the present invention, FIG.
The figure is a plan view of the slide contactor used in the present invention.
3 is a side view of FIG. 3, FIG. 5 is a plan view showing a partial cross-sectional view of the rotary contactor, and FIG. 6 is a side view of FIG. 10… Elevating device, 14… Elevating device, 15… Swirl axis,
20 ... Mold, 31 ... Power supply pole, 32,35 ... Connection power supply plate, 36 ... Upper power supply pole, 37 ... Lower power supply pole,
40 ... Slide contactor, 42 ... Rotating slider, 44 ...
Fixed contact, 45 ... Rotary contact, 50 ... Electrode holding means,
51 ... Swirl arm, 52 ... Stinger rod, 60 ...
Rotating contactor, 61 ... Rotating plate, 62 ... Fixed plate, 63, 64
…… Fixed contact, 66 …… Rotary contact, 70 …… Consumable electrode,
81… trolley, 84 …… ingot pulling device, 86 …… slide contactor.

Claims (1)

(57) [Claims] In an electroslag remelting apparatus having at least two electrode masts provided with an electrode lifting device and at least one mold, a power supply pole is provided on the electrode mast, and a slide contactor is slid on the power supply pole. The electrode lifting device is movably pressurized, and an electrode gripping means is provided on the electrode lifting / lowering device so as to be rotatable around a rotation axis, and a rotary contactor is mounted above the rotation axis. The consumable electrode, the rotary contactor and the slide contactor are electrically An electroslag remelting device, which is connected.