KR101850614B1 - Apparatus of manufacturing ingot for vacuum induction melting furnace - Google Patents

Abstract

An ingot manufacturing apparatus capable of manufacturing a high-quality ingot by preventing the occurrence of shrinkage holes appearing during the process of solidification of molten steel at an upper portion of the mold.
According to an aspect of the present invention, there is provided a method of manufacturing an ingot including a main body, a mold chamber provided in the main body and accommodating a mold for solidifying the supplied molten steel to mold the ingot, There is provided an ingot manufacturing apparatus comprising a mold preheating section for preheating a mold and an ingot melting section which is connected to the main body and at least dissolves the ingot which is solidified on the mold after molten steel is supplied into the mold.

Description

[0001] APPARATUS OF MANUFACTURING INGOT FOR VACUUM INDUCTION MELTING FURNACE [0002]

The present invention relates to an ingot manufacturing apparatus, for example, an ingot manufacturing apparatus for a vacuum melting furnace, and more particularly, to an ingot manufacturing apparatus capable of manufacturing a high-quality ingot by preventing the occurrence of shrinkage holes appearing during molten steel solidification will be.

The vacuum melting furnace is a furnace in which the interior of the vacuum melting furnace is vacuumed to dissolve metal. When such a vacuum melting furnace is used, there is an advantage that contamination from the surroundings can be prevented and the gas content in the metal can be lowered.

An ingot is a metal or alloy melted once and then put into a mold and hardened. For example, molten steel obtained from a converter, flat furnace, electric furnace, etc. in the production process of steel is poured into a mold and cooled to become an ingot (or 'ingot'). This process is called the graining process.

The ingot thus produced is rolled or rolled after being crushed and made into a steel product. On the other hand, a continuous casting method of directly casting molten steel by omitting the above-mentioned coarse-graining and crushing steps is also used.

On the other hand, molten steel which is dissolved in a vacuum melting furnace (for example, 1530 ° C) is poured into a mold and solidified. At this time, the molten steel injected into the mold first coagulates from the lower part of the mold, and the coagulation finishes at the upper part of the mold after the spouting.

At this time, when the molten steel is solidified at the upper part of the mold, the outer region of the mold first coagulates rather than the inner central portion of the mold, and a shape depressed at the inner central portion which solidifies later is called a shrinkage cavity.

In order to prevent the occurrence of shrinkage holes (or pinholes) in the ingot in the conventional case, a separate member (referred to as a " hot tower " Respectively.

The hot-top is a circular pipe made of sawdust and gauze, which is mounted on the top of the mold, allowing the temperature of the molten steel to cool slowly.

However, according to this conventional method, the amount of heat that can be supplied through the tower is not sufficient, and there has been a problem of cost increase due to wasting expensive materials.

In addition, the impurities generated when the hot tower was burned infiltrated into the molten metal, thereby deteriorating the quality of the product, and pollutants such as dust contaminated the facility and adversely affected the vacuum degree of the facility.

Related prior art is Korean Patent Publication No. 2002-0051466, which discloses a method of casting a steel ingot using an auxiliary casting.

It is an object of the present invention to provide an ingot manufacturing apparatus capable of manufacturing a high-quality ingot by preventing the occurrence of shrinkage voids appearing during the process of solidifying molten steel in the upper part of the mold.

The problems to be solved by the present invention are not limited to the above-mentioned problem (s), and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, A mold chamber provided in the main body and housing a mold for solidifying the supplied molten steel to form an ingot; A mold preheater coupled to the body so as to be movable toward the mold and preheating the mold before feeding at least molten steel; And an ingot dissolving unit coupled to the body to dissolve the ingot being solidified on the mold after at least molten steel is supplied into the mold.

Preferably, molten steel may be supplied to the mold of the mold chamber from the main chamber of the vacuum melting furnace to be supplied to the ingot manufacturing apparatus of the vacuum melting furnace. The mold preheating section may preheat the upper portion of the mold, The ingot may be melted using an arc at the top of the mold.

Preferably, the mold preheating unit includes a preheating body having an inner hollow portion and surrounding the upper portion of the mold through the hollow portion; A heating unit built in the preheating body and generating heat at a predetermined temperature to preheat the upper portion of the mold; And a heat insulating portion filled between the preheating body and the heat generating portion.

 The mold preheater may further include: a temperature detector for measuring a heat generation temperature of the heating unit; And a temperature control unit for receiving a signal related to the heating temperature measured by the temperature detecting unit and comparing the reference temperature with the reference temperature to control the heating unit to generate heat at a set temperature.

The mold preheating unit may include a cylinder unit coupled to the body to move the preheating body up and down; And a fixing member connected between the operation rod of the cylinder part and the preheating body.

Preferably, the ingot dissolving portion includes an arc generating portion for generating an arc toward the ingot being solidified at the upper portion of the mold; An elevation driving part for moving the arc generating part from the main body to the upper part of the mold; And a horizontal driving unit for horizontally moving the arc generating unit moved to an upper portion of the mold by the elevation driving unit to a position for dissolving the ingot under solidification.

Preferably, the arc generating unit includes: a rod body having a ball member; And a nozzle unit coupled to the rod body to generate an arc.

The arc generating unit may include: a ball cap having the ball member movably engaged with the ball member; And a ball flange for penetrating the nozzle portion and supporting the lower portion of the ball member to enable tilting of the rod body.

Preferably, the main body includes an upper body and a lower body which vertically move up and down to face the mold chamber, and the elevation driving unit includes a first driving unit for providing a rotational force necessary for raising and lowering the arc generating unit, motor; And a first driving screw that is coupled between the upper body and the lower body and receives a rotational force from the first driving motor to lift the elevating body connected to the arc generating part.

The horizontal driving unit may include a second driving motor coupled to the lifting body to provide a rotational force necessary to move the arc generating unit forward and backward and a second driving motor coupled to the elevating body to move the arc generating unit forward and backward, A front and rear driving unit including two driving screws; A third driving motor coupled to the lifting body to provide a rotational force required to move the arc generating unit to the left and right, and a third driving screw that receives the rotational force provided from the third driving motor to move the arc generating unit to the left and right, And a left and a right driving unit.

Preferably, the main body may include a check window which can be seen inside the mold when an ingot which is solidifying at the top of the mold is dissolved by using an arc.

According to the present invention, the solidification speed of the molten metal can be delayed at the upper portion of the mold by heating the molten metal in the vacuum melting furnace not to solidify during the solidification process. Accordingly, the molten metal in the upper portion of the mold flows into the central portion of the ingot, thereby preventing generation of shrinkage holes (including pinholes) generated in the upper portion of the ingot in the conventional case, thereby providing a high quality ingot.

Further, according to the present invention, by removing the moisture contained in the mold by applying the ingot dissolution method using the preheating and the arc of the mold, generation of shrinkage holes (including pinholes) in the ingot is suppressed to improve the product quality .

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

Fig. 1 is an overall configuration diagram briefly showing an ingot manufacturing apparatus for a vacuum melting furnace according to an embodiment of the present invention.
2 is a view schematically showing a mold preheating part and an ingot melting part according to an embodiment of the present invention.
3 is a view schematically showing a mold preheating section according to an embodiment of the present invention.
4 is a view for explaining the action of the mold preheating part and the ingot melting part according to the embodiment of the present invention.
5 is a front view schematically showing a main body, a mold preheating portion, and an ingot melting portion in an ingot manufacturing apparatus for a vacuum melting furnace according to an embodiment of the present invention.
6 is a view schematically showing a horizontal driving unit in an ingot manufacturing apparatus of a vacuum melting furnace according to an embodiment of the present invention.
FIG. 7 is a view showing a state (a) of preheating an upper portion of a mold by using an apparatus for producing an ingot of a vacuum melting furnace according to an embodiment of the present invention and a state (b) of dissolving the solidified ingot through arc generation at the upper portion of the mold FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein, It is provided to inform.

The vacuum melting furnace is a furnace in which the interior of the vacuum melting furnace is vacuumed to dissolve metal. When such a vacuum melting furnace is used, there is an advantage that contamination from the surroundings can be prevented and the gas content in the metal can be lowered.

An ingot is a metal or alloy melted once and then put into a mold and hardened. For example, molten steel obtained from a converter, flat furnace, electric furnace, etc. in the production process of steel is poured into a mold and cooled to become an ingot (or 'ingot'). This process is called the graining process. The ingot thus produced is rolled or rolled after being crushed and made into a steel product.

FIG. 1 is an overall schematic view showing an ingot manufacturing apparatus for a vacuum melting furnace according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a mold preheating section and an ingot melting section according to an embodiment of the present invention.

1 and 2, an ingot manufacturing apparatus 100 for a vacuum melting furnace according to an embodiment of the present invention includes a main body 110, a mold chamber 3, a mold preheating section 130 (see FIG. 2) And a dissolving portion 150 (see Fig. 5). 5) may include an arc generating unit 160 (see FIG. 2), an elevating driving unit 170 (see FIG. 5), and a horizontal driving unit 180 (see FIG. 5).

The main body 110 may be disposed adjacent to one side of the main chamber 1 of the vacuum melting furnace as shown in FIG. 1, and a mold chamber 3 in which the mold 10 is accommodated is formed below the main chamber 1.

The main body 110 includes an upper body 111, a lower body 113, and a lifting body 115 that is raised and lowered between the upper body 111 and the upper body.

Specifically, the upper body 111, the lower body 113, and the lifting body 115 may be formed of a plate-shaped member arranged in the horizontal direction.

Also, the upper body 111 and the lower body 113 can be moved up and down to face the mold chamber 3 while maintaining a constant gap.

The lifting and lowering operation of the lifting body 115 can be performed by the lifting and lowering driving unit 170 (described later), which will be described later, , See Fig. 5). A detailed description thereof will be described with reference to FIG.

The mold chamber 3 can accommodate the mold 10 for solidifying the molten steel supplied from the main chamber 1 of the vacuum melting furnace to mold the ingot.

For example, such a mold chamber 3 may be provided at a lower portion of the main body 110 disposed close to the main chamber 1 of the vacuum melting furnace.

Preferably, the molten steel supplied from the main chamber 1 is filled into the mold 10 and transferred to the mold chamber 3, which can be made possible by the bogie 20 which can travel into the mold chamber 3 . The bogie portion 20 can be driven by a bogie transfer portion 30 including a working rod (or working ram) which can be advanced and retreated in a predetermined direction such as a cylinder or the like.

With this structure, the mold 10 filled with molten steel into the mold chamber 3 is housed and can be molded into the ingot inside the mold chamber 3. [

The mold preheating section 130 (see FIG. 2) is provided to prevent molds 10 (see FIG. 7) from being formed before the molten steel is supplied from the main chamber 1 of the vacuum melting furnace to the mold 10 ) Is heated to a set temperature (hereinafter referred to as " preheating ").

The mold preheating section 130 can be coupled to the main body 110 (see FIG. 1) as shown in FIG. 2, and specifically to the mold 10 (see FIG. 1) accommodated in the mold chamber 3 It can be formed so as to be movable up and down.

3 is an enlarged view of the mold preheating section 130. As shown in FIG.

Referring to FIG. 3, the mold preheating section 130 may include a preheating body 131, a heat generating section 133, and a heat insulating section 134.

The preheating body 131 refers to a member in the form of a rectangular frame having a hollow portion 131a on the inner side.

It is preferable that the hollow portion 131a of the preheating body 131 is relatively large compared to the size of the mold 10 (see FIG. 4). As such, the preheating body 131 may be arranged to surround the upper portion of the mold 10 (FIG. 4).

The heat generating unit 133 is installed in the preheating body 131. The heat generating unit 133 generates heat at a preset temperature by an external power source to preheat the upper portion of the mold 10 (see FIG. 4).

The temperature preheated by the heat generating part 133 can be set within a range of 700 to 800 ° C. Such a set temperature can be appropriately changed according to the process conditions for manufacturing the ingot and the operator's choice.

The heat generating part 133 may be made of a heat generating material such as a tungsten alloy, but is not limited thereto.

The heat insulating portion 133 refers to a heat insulating material for refractory which is filled between the preheating body 131 and the heat generating portion 133. Various materials can be used for the heat insulating portion 133, but it is not limited to a specific material.

The mold preheater 130 according to the embodiment of the present invention may further include a temperature detector 135 and a temperature controller 136.

The temperature detecting unit 135 can measure the temperature of the heat generated by the heating unit 133 through the preheating body 131.

The temperature detector 135 may be a temperature sensor such as a thermocouple. Preferably, the temperature detector 135 may include a plurality of temperature detectors 135 for measuring temperature at various points of the preheating body 131 to increase measurement accuracy .

The temperature control unit 136 receives the measured temperature signal from the temperature detection unit 135 and compares the measured temperature signal with the reference temperature to preheat the upper portion of the mold 10 (133) to generate heat at a predetermined temperature.

The mold preheating section 130 includes a cylinder section 137 for moving the preheating body 131 up and down and a fixing member 139 for connecting the cylinder section 137 and the preheating body 131.

The cylinder portion 137 is coupled to the main body 110 (see FIG. 1) as shown in FIG. 2 and includes an up-and-down movable operation rod 138. The vertical position of the preheating body 131 can be adjusted in conjunction with the upward and downward movement of the operating rod 138.

The operation rod 138 may be provided with a seal member 138a. The seal member 138a is coupled to a portion through which the operation rod 138 is inserted so that the sealing performance can be ensured. The shape and material of the seal member 138a are not limited to a specific shape.

The fixing member 139 connects between the operating rod 138 of the cylinder portion 137 and the upper portion of the preheating body 131 and serves to fix them.

For example, one end (i.e., upper end) of the fixing member 139 is connected to the lower end of the actuating rod 138, and the other end (i.e., lower end) of the fixing member 139 can be connected to the upper portion of the preheating body 131 .

Specifically, two cylinder portions 137 may be provided toward both sides of the preheating body 131. One end (that is, the upper end) of the fixing member 139 may be connected to the actuating rod 138. The two actuating rods 138 may be vertically moved.

형상으로 분기되어 연결될 수 있다. 이를 위해, 예열몸체(131)의 상부에는 고정부재(139)의 타단(즉, 하단)이 삽입 고정되기 위한 4개의 고정홈(131b)이 각 모서리마다 하나씩 마련될 수 있다.
The other end (that is, the lower end) of the fixing member 139 has two fixing portions for each of both sides of the preheating body 131

And can be branched and connected. To this end, four fixing grooves 131b for inserting and fixing the other end (i.e., lower end) of the fixing member 139 may be provided on the upper part of the preheating body 131, one for each corner.

The ingot dissection 150 (see FIG. 5) may be coupled to the body 110 (see FIG. 5). The ingot dissolving unit 150 (see FIG. 5) serves to dissolve the solidified ingot at the upper portion of the mold 10 (see FIG. 5) by using the arc. For this purpose, the ingot dissolving unit 150 may include an arc generating unit 160, an elevation driving unit 170, and a horizontal driving unit 180 as shown in FIG.

The arc generating portion 160 can generate an arc toward the solidifying ingot at the upper portion of the mold 10. [ The elevator driving part 170 is coupled to the main body 110 and moves the arc generating part 160 to the upper part of the mold 10. The horizontal driving unit 180 dissolves the ingot S which is solidifying the arc generating unit 160 (more specifically, the nozzle unit 163) moved to the upper portion of the mold 10 by the elevation driving unit 170 To the position to be moved.

The arc generating unit 160 will be described with reference to FIG.

2, the arc generating unit 160 includes a rod body 161 which is vertically long and connected to the rod body 161, and a nozzle unit 163 coupled to the end of the rod body 161 to generate an arc ).

The nozzle portion 163 is moved (and tilted) toward the solidifying ingot S at the upper portion of the mold 10 (see Fig. 5) by the elevation driving portion 170 (see Fig. 5) and the horizontal driving portion 180 ), And an arc is generated to dissolve the ingot (S) in solidification.

That is, the shrinkage hole SC (see FIG. 7) can be removed by using the arc generated in the nozzle unit 163.

At this time, various seal members (e.g., O-ring members, etc.) may be provided for securing the sealing performance although the rod body 161 is not shown at the portion where the rod body 161 passes through the mold chamber 3 (see FIG. 1).

The rod body 161 may be provided with a ball member 162 at a position spaced apart from the nozzle unit 163 by a predetermined distance. The ball member 162 may be provided in a shape having an enlarged cross-section as compared with the body of the rod body 161. A ball cap 165 and a ball flange 166 may be further provided to surround the ball member 162 and allow the ball member 162 to flow.

The ball flange 166 supports the lower portion of the ball member 162 and the nozzle portion 163 is disposed downward through the ball flange 166 so that the rod body 161 is tilted within a predetermined range , Inclination angle change) operation can be performed.

4 is a view for explaining the action of the mold preheating part and the ingot melting part according to the embodiment of the present invention.

4, the mold preheating section 130 is configured such that the operating rod 138 of the cylinder section 137 moves forward and backward along the W3 direction (i.e., the vertical direction) to move the preheating body 133 having the heat generating section 133 131 may move the preheating body 131 so as to surround the upper portion of the mold 10. [

The arc generating unit 160 can be moved to the upper portion of the mold 10 by the elevation driving unit 170 (see FIG. 5) and the horizontal driving unit 180 (see FIG. 5) , Left and right directions), and W3 direction (i.e., up and down directions).

FIG. 5 is a view schematically showing a main body, a mold preheating portion, and an ingot melting portion in an apparatus for producing an ingot of a vacuum melting furnace according to an embodiment of the present invention, and FIG. 6 is a view schematically showing the horizontal driving portion shown in FIG.

Referring to FIG. 5, the body 110 may be disposed above the mold 10.

Specifically, the main body 110 includes an upper body 111 and a lower body 113 fixed to the upper portion of the mold 10, and a lifting body 115 ).

The elevating driving unit 170 may include a first driving motor 171 (see FIG. 7) and a first driving screw 173 that provide a rotational force necessary for raising and lowering the arc generating unit 160.

The first driving screw 173 may be a ball screw or the like and may be vertically connected between the upper body 111 and the lower body 113.

The first driving screw 173 receives the rotational force from the first driving motor 171 (see FIG. 7) and moves the elevating body 115 connected to the arc generating part 160 in the vertical direction.

The nozzle portion 163 of the arc generating portion 160 can be accurately moved toward the solidifying ingot at the upper portion of the mold 10 and can be moved toward the solidified portion such as the shrinkage hole SC An arc can be generated toward a portion where dissolution is required.

The horizontal driving part 180 moves the arc generating part 160 moved to the upper part of the mold 10 by the elevation driving part 170 to the position where the solidifying ingot is to be melted properly in the horizontal direction .

To this end, the horizontal driving unit 180 includes a front-rear driving unit 181 for moving the arc generating unit 160 in the front-rear direction, and a left and right driving unit 185 for moving the arc generating unit 160 in the left-right direction.

6, the front drive unit 181 can move the rod body 161 in the forward and backward directions of the lifting body 115. For this purpose, the second drive motor 182 and the second drive screw 183 can move the rod body 161, .

The second drive motor 182 is coupled to the lifting body 115 and provides a rotational force necessary to move the rod body 161 of the arc generating portion in the forward and backward directions (i.e., in the W1 direction).

The second driving screw 183 receives the rotational force from the second driving motor 182 and can move the rod body 161 in the forward and backward directions.

The left and right driving unit 185 can move the rod body 161 in the right and left direction of the lifting body 115 as shown in FIG. 6. For this purpose, the third driving motor 186 and the third driving screw 187, .

The third drive motor 186 is coupled to the lifting body 115 and is coupled to the second drive motor 182 in a direction intersecting with the second drive motor 182 to provide a rotational force necessary to move the rod body 161 of the arc generation portion to the left and right .

The third driving screw 187 receives the rotational force from the third driving motor 186 and can move the rod body 161 to the left and right. Preferably, the third driving screw 187 rotates in a direction crossing the second driving screw 183 .

Although not shown in FIG. 5, a proximity switch that limits the vertical movement height of the arc generating part 160 may be further used to prevent damage or damage to the arc generating part 160, but the present invention is not limited thereto .

The main body 110 configured as described above may further include an inspection window 117.

Referring to FIG. 5, the inspection window 117 is provided to identify the upper portion of the mold 10. The position of the nozzle unit 163 can be moved more precisely using the check window 117. [

Particularly, the process of generating an arc by moving the nozzle unit 163 toward the shrinkage hole SC (see FIG. 7) formed on the upper part of the ingot can be visually confirmed.

7 is a view showing a state in which a mold is preheated by using an apparatus for producing an ingot of a vacuum melting furnace according to an embodiment of the present invention (see Fig. 7 (a)) and a state where an ingot undergoing arc solidification is melted to remove a shrinkage cavity (B) of FIG.

According to the present invention, the mold 10 can be sufficiently preheated in the mold chamber 3 (see Fig. 1) before molten steel is supplied in the main chamber 1 (see Fig. 1) of the vacuum melting furnace.

7 (a), the mold preheating section 130 (more specifically, the preheating body 131 (see FIG. 4)) is moved to the top of the mold 10 and the mold 10 ) Is preheated.

This may have the effect of restraining the generation of shrinkage holes (or pinholes) (see FIG. 7) at the upper part of the ingot when the molten steel supplied to the mold 10 solidifies into the ingot.

At this time, the preheating temperature can be set within a range of about 700 to 800 ° C, which is a temperature that can be slightly changed according to the process conditions.

On the other hand, when the injection of the alloying element into the molten metal is completed in the main chamber 1 (see FIG. 1) of the vacuum melting furnace, the molten metal is tapped (that is, supplied) into the preheated mold 10, (See Fig. 1) by means of the mold 20 (see Fig. 1).

Molten steel filled in the mold 10 gradually solidifies from the lower part of the mold 10 and solidified at the upper part of the mold 10 to be formed into the ingot S.

At this time, as shown in FIG. 7 (b), the shrinkage hole SC may be formed in the upper part of the ingot S. In order to prevent this, the arc generating part 160 may be used.

The arc generating unit 160 can be adjusted in the front, rear, and left and right directions, as well as be damaged by the elevation driving unit 170 (see FIG. 5) and the horizontal driving unit 180 (see FIG. The operator checks the solidification state of the molten steel in the mold 10 and the formation of the shrinkage hole SC through the inspection window 117 (see FIG. 5) provided in the main body 110 (see FIG. 5) Thereby adjusting the position of the display unit 160.

Accordingly, it is possible to dissolve the solidified portion by using the arc (i.e., arc heat) A generated from the arc generating portion 160, or even to dissolve and remove the already generated shrinkage hole SC Effect can be obtained. Thereafter, the ingot S solidified with the shrinkage hole SC (or pinhole) removed is separated from the mold 10 and can be provided as a high-quality product.

As described above, according to the structure and the function of the present invention, the solidification speed of the molten metal can be delayed at the upper portion of the mold by heating the molten metal in the vacuum melting furnace not to solidify during the solidification process.

Accordingly, the molten metal in the upper portion of the mold flows to the central portion of the ingot, thereby preventing generation of shrinkage holes (including pinholes) that have occurred in the conventional ingot, thereby providing a high quality ingot.

In addition, by removing the moisture contained in the mold by applying the ingot dissolution method using the preheating and the arc of the mold, generation of shrinkage holes (including pinholes) in the ingot can be suppressed, and the product quality can be improved.

While the present invention has been described with reference to the exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments and drawings, and various changes and modifications may be made without departing from the scope of the present invention. It is obvious that a transformation can be made. In addition, although explaining the embodiment of the above-mentioned design and explaining the effect of the design according to the construction of the design is not explicitly described, it is a matter of course that a predictable effect should also be acknowledged by the constitution.

A: arc S: ingot
SC: Shrinkage cavity 1: Main chamber
3: mold chamber 10: mold
20: Lending part 30: Balance sending part
100: ingot manufacturing apparatus 110:
111: upper body 113: lower body
115: lifting body 117: inspection window
130: mold preheating part 131: preheating body
131a: Hollow portion 131b: Fixing groove
133: heat generating part 134:
135: temperature detection unit 136: temperature control unit
137: cylinder part 138: working rod
138a: Seal member 139: Fixing member
150: dissolution for ingot 160: arc generation part
161: rod body 162: ball member
163: nozzle unit 165: ball cap
166 Ball flange 170:
171: first drive motor 173: first drive screw
180: a horizontal driving unit 181:
182: second drive motor 183: second drive screw
185: right and left drive unit 186: third drive motor
187: Third driving screw

Claims (11)

main body;
A mold chamber provided in the main body and housing a mold for solidifying the supplied molten steel to form an ingot;
A mold preheater coupled to the body so as to be movable toward the mold and preheating the mold before feeding at least molten steel; And
And an ingot dissolving unit coupled to the body to dissolve the ingot being solidified on the mold after at least molten steel is supplied into the mold,
Wherein the mold preheating unit includes a preheating body having a hollow portion inside and surrounding the upper portion of the mold through the hollow portion;
A heating unit built in the preheating body and generating heat at a predetermined temperature to preheat the upper portion of the mold;
A heat insulating portion filled between the preheating body and the heat generating portion and made of a heat insulating material for refracting;
A temperature detector for measuring a temperature of heat generated by the heating unit through the preheating body;
A temperature control unit for receiving a signal regarding the measured heat temperature from the temperature detector and controlling the heat generator to generate heat at a set temperature by comparing the measured temperature with a reference temperature;
A cylinder unit coupled to the body to move the preheating body up and down; And
And a fixing member connected between the operating rod of the cylinder part and the preheating body.
The method according to claim 1,
Molten steel is supplied to the mold of the mold chamber from the main chamber of the vacuum melting furnace to be supplied to the ingot manufacturing apparatus of the vacuum melting furnace,
Wherein the mold preheating part preheats the upper part of the mold and the ingot dissolving part dissolves the ingot using an arc at an upper part of the mold.
delete delete delete The method according to claim 1,
Wherein the ingot dissolving unit comprises:
An arc generating portion for generating an arc toward an ingot being solidified at an upper portion of the mold;
An elevation driving part for moving the arc generating part from the main body to the upper part of the mold; And
A horizontal driving unit that horizontally moves the arc generating unit moved to an upper portion of the mold by the elevation driving unit to a position where the ingot under solidification is dissolved;
.
The method according to claim 6,
Wherein the arc-
A rod body having a ball member; And
A nozzle unit coupled to the rod body to generate an arc;
.
8. The method of claim 7,
Wherein the arc-
A ball cap in which the ball member is movably engaged with the ball member; And
A ball flange for penetrating the nozzle portion and supporting a lower portion of the ball member to enable tilting of the rod body;
.
The method according to claim 6,
Wherein the body includes an upper body and a lower body which move up and down to face the mold chamber with an upper and a lower spacing,
The lifting /
A first drive motor for providing a rotational force necessary for raising and lowering the arc generating unit; And
A first driving screw which is coupled between the upper body and the lower body and receives a rotational force provided from the first driving motor to lift the elevating body connected to the arc generating part;
.
10. The method of claim 9,
Wherein the horizontal driver comprises:
A second driving motor coupled to the lifting body to provide a rotational force required to move the arc generating unit forward and backward and a second driving screw to receive the rotational force from the second driving motor to move the arc generating unit back and forth, A front and rear drive unit; And
A third driving motor coupled to the lifting body to provide a rotational force required to move the arc generating part to the left and right and a third driving screw to receive the rotational force from the third driving motor to move the arc generating part to the left and right, A left and right driving unit including;
.
3. The method of claim 2,
The main body includes:
An inspection window which can be seen inside the mold when an ingot which is solidifying at an upper portion of the mold is dissolved using an arc;
.

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