JPS63310926A - Electrode extension device - Google Patents

Abstract

PURPOSE:To improve production efficiency by providing an insertion hole for the insertion of a new electrode, a base supported on the outside of a furnace wall, etc., and adding the new electrode to an energized electrode. CONSTITUTION:The electrode extension device is formed by the base 20, a support 30, an electrode holding cylinder 43, and a turning gear 50 for rotating the cylinder 43. The base 20 has an electrode insertion hole, and is supported on the outside of the vacuum furnace wall. In addition, the support 30 has an electrode insertion hole, and is elastically supported above the base 20. Moreover, the electrode holding cylinder 43 is rotatively provided on the support 30, and holds an electrode 110.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is particularly applicable to various devices used in manufacturing devices that continuously obtain slabs of arbitrary length by vacuum arc remelting. This invention relates to an electrode addition device that can add electrodes outside the furnace. [Prior art] The vAR method and the VADBR method are methods for producing an ingot having a fine and high-quality solidified structure by performing arc discharge in a vacuum using a metal rod as a self-fusing electrode and remelting it. There are also methods that apply these methods.

Figure 4 shows an example of such an ingot manufacturing method, in which a water-cooled mold (101) is provided in a vacuum furnace (100), and electrodes (110) (110) are placed opposite each other to form a core. Department! (1ox) above. And this one! between the electrodes (110) (110) and the electrodes (11
0) Arbitrary arc discharge'#IL8 is performed between the molten metal in the mold (110) and the electrode (110) (
110) is remelted, and the molten metal dropped therefrom is solidified in the mold (101) to form an ingot (111). This ingot (111) extends into the furnace ingot storage space (102) below the mold (101), and is taken out of the furnace when it reaches a certain length.

In the vacuum furnace described above, the electrodes (1
10) Between (110) and electrodes (110) (110)
In order to maintain a constant distance between the electrodes (110) and molten metal in the chamber (101), a device is installed to send the electrodes (110) (110) toward the inside of the furnace in response to the melting of the electrodes (Qto) (no). There is. As shown in FIG. 5, this electrode feeding device is a water-cooled shirt (water-cooled shirt) that is penetrated through the furnace wall (100 m) of a vacuum furnace so that it can move forward and backward in an airtight manner using a sealing device (120) such as an O-ring. 121), and the shaft (1
An electrode (110) is supported at the tip of the electrode (21). A feeding device (122) such as a screw feeding device is provided on the rear end side of the shirt (121), and
) will be moved forward and backward. Also, in order to prevent the molten part from shifting to the negative side of the electrode (110) during arc discharge, the entire electrode (110) may be rotated so that the molten part becomes uniform.

[Problem to be solved by the invention] However, the IC poles (11
The length of ingot (111) that can be manufactured is limited by the length that can be put into the vacuum furnace.
The length of can also be influenced by this. Moreover, if the length of the electrode (11) used in this way is limited, each time the electrode (Qto) used is worn out, the ingot manufacturing equipment must be stopped and a new electrode (110) installed. After that, a series of operations had to be carried out to evacuate the vacuum furnace and prepare for the next operation, and production efficiency was not very high.

The present invention was devised in view of the above-mentioned problems.
The present invention solves the above problem by devising a configuration in which electrodes are continuously fed in from outside the furnace through a sealing device during energization, and by providing a device that replenishes the electrodes necessary for continuous feeding outside the furnace. [A means to solve problems] The present invention is a new 'JL pole, which is a screwed back end of the electrode, which is inserted inside the vacuum furnace. Therefore, as shown in Figure 1,
An insertion hole (2a) into which an electrode (1) such as an electrode that moves through the wall of a vacuum furnace or a new electrode connected thereto is inserted.
The base (2) is supported on the outside of the furnace wall, and also has an electrode insertion hole (3 m), and the electrode (1) is elastically supported in the axial direction above the base (2). a supporting base (3); an electrode holding cylinder (4) that is rotatably provided on the supporting base (3) and capable of holding an electrode (11 by penetrating it into a hollow part thereof; and the electrode holding cylinder). The basic feature is that it has a rotation 1 drive device (5) for rotating (4) on the support base (3).

[For production]

In the above configuration, the electrode (11
the rear end of the base (2) and the support base (3).
m) (3a), and insert the entire device into the electrode (1).
) to be fixed around. On the other hand, insert the new electrode (1) into the electrode holding tube (4), and place the new electrode (1) into contact with the screwable part on the tip side of the electrode (1). Hold. In that state, the rotary drive device (5
) to rotate the electrode holding cylinder (4) on the support base (3), the new electrode (1) will be screwed onto the rear end of the electrode (11) while rotating together. .

In addition, if the electrode (1) sent into the furnace is sent while rotating in a constant direction, loosen the hold of the new electrode (1) inserted into the electrode holding tube (4) slightly, and remove the electrode. (11 can be screwed onto the electrode (11) by simply pressing it firmly against it. Therefore, in that case, the rotation drive device (5) that rotates the electrode holding cylinder (4)
There is no need to activate it. In addition, if the electrode (1) is constantly rotated and transferred in the direction of the furnace, the device (
5) There is no need to create one yourself.

〔Example〕 Specific examples of the present invention will be described below.

FIG. 2 is a longitudinal sectional view of an electrode addition device according to an embodiment of the present invention.

The device of the present invention consists of a base fixed to the wall side of the vacuum furnace, a support stand provided above the four bases, and an electrode rotatably provided on the support stand. A holding tube (40) and a rotation drive device that rotates the electrode holding tube (40) on the support base ω! (50).

The base (2) supports the other devices mentioned above that operate when screwing and adding electrodes. It is fixed to the wall of the vacuum furnace. Further, an insertion hole Q2) is bored in the center thereof, through which the electrode inserted into the furnace and a new electrode connected thereto are inserted.
Further, a plurality of guide holes 4 are provided corresponding to guide bars (32) of a support base (to be described later).

The support base ω also has an electrode insertion hole (31), and guide bars (32) are fixed at multiple locations on the lower surface of the support base ω. The guide hole I is provided with is inserted into the guide hole I. Furthermore, the guide bar (3
A spring (33) is mounted around the base (2), and the spring (33) is interposed between the base (4) and the support (to), and the support base is connected to the ift pole above the base (A). It is elastically supported in the axial direction f.

The electrode holding cylinder (40) is rotatably provided on the support base ω by a slewing ring bearing (41), and includes a ring-shaped plywood (42) with rotating teeth (42a) carved on the outer peripheral surface;
It consists of a cylindrical cylindrical body (0) provided on top of the cylindrical body, and an electrode can be inserted into the hollow part thereof.

In addition, a notch hole (44) is provided in the side surface of the cylinder (43), and a shoe (4) is used to press the inside of the cylinder (43) from there.
5) can enter and exit. That is, the base plate (
42) An L-shaped metal fitting (47) is rotatably supported on the upper hinge (46), and the shoe (45) is pressed into and out of the notch hole (44) by one end of the L-shaped metal fitting A (47). The other end of the L-shaped fitting (47) and the cylindrical body (4
3) The pressure cylinder (49), which expands and contracts with hydraulic pressure, is pivotally connected to the side hinge (48). Therefore, this pressing is performed by expanding and contracting the rod of the cylinder (49), and the pressing is performed via the L-shaped fitting (47) by the shoe (45).
) into and out of the cylinder (43) through the notch hole (44), and press the shoe (45) against the side surface of the electrode inserted into the electrode holding cylinder (40) to hold the electrode. I'm trying to keep it. In addition, in this example, the cylindrical body (
43) Another notch hole (60) is provided on the other side, and a dogleg-shaped stopper (60) is inserted into the cylindrical body (43) from there.
1) One end can be accessed.

That is, the hinge (62) is fixed on the plywood (42) near the notch hole (60), and a dogleg-shaped stopper (6
1) is rotatably supported, and a hinge (63) protruding from the side of the cylindrical body (43) is rotatably mounted. A cylinder rod is pivotally attached to the other end of the stopper (61). Therefore, by expanding and contracting the rod of the stopper cylinder (64), one end of the stopper (61) can be moved in and out of the cylindrical body (43) through the notch hole (60). The tip of the electrode inserted into the electrode holding tube (40) can be stopped there.

The rotation drive device (50) includes a rotation motor (51) (hydraulic or electric may be used as long as it has a torque suitable for screwing) fixed to the side surface of the support base ω, and is attached to the tip of the shaft, It is also composed of an electrode holding cylinder (four pieces of plywood (42)) and a wheel (52) that meshes with rotating teeth (42m) on the outer peripheral surface.

Next, a method of using the above-mentioned electrode addition device will be explained.

Both ends of the electrode Qlo) (no) to be connected are female threaded, as shown in Figures 3 (,) to (C), and a nipple (70) made of the same material as the electrode is screwed into the end. It is supposed to connect.

In the same figure (a), the insertion hole (
21) The rear end of the energized electrode (110) is inserted into (31), and in this state, the nipple (7) is inserted at the tip.
The new electrode (110) to which 0) is attached is suspended by a crane (not shown) via a crane hoist (80) and inserted into the cylinder body (43) of the single-pole hold cylinder (40). At this time, the stopper (61) is protruding into the cylinder (43), and the pressing shoe (45) is retracted. Therefore, the tip of the new electrode (110) is pulled out with the stopper (61), and the crane hanger (80) is removed. The reason why the new electrode (110) is temporarily stopped by the stopper (61) in this way is to prevent electricity from flowing from the current electrode (110) to the crane or the worker.

Then, as shown in FIG. 3(b), the pressing is performed by a shoe (4
5) is pressed against the new electrode (110) of the low-pressure blue iron, and the stopper (61) is retracted. Then, the new electrode (110) descends along the inside of the cylindrical body (43) without being braked by the shoe (45), and the nipple (70) of the new electrode (110) connects to the energized electrode. Descend until you hit (110).

Furthermore, as shown in FIG. 3(c), the pressing is performed using a shoe (45
) to hold the new electrode (110) firmly within the cylinder (43), and then rotate the rotational drive device (50
) to operate the motor (51) of the electrode holding tube (40).
) Rotate the whole thing. Then, the nipple (70) at the tip of the new electrode (110) is screwed into the rear end of the current electrode (110). At this time, the movement of the new pole (110) in the axial direction due to screwing is absorbed by the contraction f of the spring (33) elastically supporting the support base ω.

During the above operation, the hydraulic pressure supply hoses (49a) (64m) of both cylinders (49) (64) are connected to the drum (90m).
), the entire electrode holding member (40) can be rotated many times.

〔Effect of the invention〕

According to the electrode addition device of the present invention described above, new electrodes can be added to current electrodes, so there is no restriction on the length of the electrode that can be inserted into the vacuum furnace, and the length of the electrode can be adjusted to any desired length. Since slabs can be manufactured and there is no need to stop the operation of slab manufacturing equipment midway through, production efficiency is also improved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the basic configuration of the present invention, Fig. 2 is a longitudinal cross-sectional view of an electrode addition device according to an embodiment of the present invention, and Fig. 3 (a), (b), and (c) are the devices concerned. FIG. FIG. 4 is an explanatory view showing an example of an ingot manufacturing method, and FIG. 5 is a longitudinal cross-sectional view showing an example of an electrode feeding position or an ingot drawing device used in such a manufacturing method. In the figure, (1) (110) is the electrode, (2) (20) is the base, (3) (30) is the support base, (2m) (21)
(3a) (31) is the insertion hole, (4) (40)
(5) and (50) indicate an electrode holding cylinder, and (50) a rotary drive device, respectively. Patent distributed by Nippon Kokan Co., Ltd. Inventor Yasuo Yanagibashi Representative Patent Attorney Sho Yoshihara Sanmen Same
Masatoshi Tomabechi

Claims (1)

[Claims] It has an insertion hole for electrode insertion, and is attached to the vacuum furnace wall. A base supported on the outside and also an electrode insert. It has a through hole and elastically moves in the direction of the electrode axis above the base. A support stand that is supported sexually and rotated on the support stand. Possible to penetrate the electrode into the hollow part Electrode hole that can be held tightly Place the electrode holding tube and the electrode holding tube on the support base. and a rotary drive device that rotates the An electrode addition device characterized by: