KR20180010631A - Vacuum furnace - Google Patents

Abstract

The present invention relates to a vacuum furnace, including: a body portion coupled with at least one of a front cover portion coupled to a front surface thereof and a rear cover portion coupled to a rear surface thereof; a heating chamber provided inside the body portion and performing heat treatment of metal; and a plurality of heating means mounted in the heating chamber and emitting heat, wherein each of the heating means bends one heating means from one end toward the other end so as to surround an inner periphery of the heating chamber.

Description

{VACUUM FURNACE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vacuum furnace, and more particularly, to a vacuum furnace which can be used for a long period of time by preventing shortening of its service life and enhancing thermal efficiency.

A vacuum furnace is used to dissolve a metal in a vacuum, and it is free from contamination and can reduce gas content in the metal. In addition, a vacuum furnace is used for heat-treating a metal. The metal is annealed in such a manner that the metal is heated to a proper temperature and then cooled to change the characteristics of the metal according to crystal changes inside the metal. As described above, the metal subjected to the heat treatment in the vacuum furnace has high hardness, little deformation, and has improved wear resistance and is applied to special metals such as tool steel and heat resistant steel.

In the case of dissolving or heat treating a metal by using a vacuum furnace, the metal is placed inside the vacuum furnace, and then the inside is heated in a state of being pressurized under vacuum, and cooled through a cooling means after a predetermined time. In this case, the temperature inside the vacuum furnace radiates so that the temperature rises up to 1200 ° C or more. During the cooling process, the cold air circulates inside the vacuum furnace to generate moisture therein, and the life of the vacuum furnace is shortened due to air and moisture there is a problem.

In addition, a heat wire is used to dissipate heat inside the vacuum furnace, and heat beams of a predetermined size are mounted at regular intervals in an area except the lower part of the area where the metal is located in the vacuum furnace. As a result, heat is not uniformly transferred to the heat-treated metal in the inside of the vacuum furnace, and thus the dimension of the metal is deformed or the quality is deteriorated. In the region where the heat ray is not mounted, .

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum furnace capable of preventing moisture from being generated inside a vacuum furnace to prevent shortening of life.

In addition, the present invention relates to a vacuum furnace capable of uniformly transferring heat to a metal that is heat-treated in a vacuum furnace, thereby improving thermal efficiency.

The present invention relates to a portable terminal comprising: a body portion which engages with at least one of a front cover portion and a rear cover portion; A heating chamber provided in the body for heat treating the metal; And a plurality of heating means provided in the heating chamber to radiate heat, wherein each of the heating means includes a heating means for heating the heating means in a vacuum furnace .

Here, each of the heat generating means is provided to surround the inner circumference of the heating chamber along the width direction, and may be provided at predetermined intervals along the longitudinal direction around the inner circumference of the heating chamber.

In addition, the heat generating means may be constituted of a plate shape or a cantilever material.

Further, each of the heating means may be mounted in the heating chamber through the heating means coupling portion, and a separate heating means of a predetermined size may be further coupled to the coupling portion of the heating means and the heating means coupling portion.

Further, the heat generating means coupling portion may be formed of a ceramic insulator material.

Further, the heating chamber may be composed of a heat-resistant member composed of a carbon sheet and a carbon board, and an insulating member composed of ceramic wool.

The heating chamber includes a first heat-resistant member formed of a carbon sheet and a second heat-insulating member formed of ceramic wool. The second heat-insulating member is made of ceramic wool on the inner circumferential surface of the first heat- And a second heat resistant member made of a carbon board on the inner circumferential surface of the insulating member.

Since the moisture is not generated in the heating chamber of the vacuum furnace during the process of dissolving or heat-treating the metal by using the vacuum furnace, the lifetime of the vacuum furnace can be prevented from being shortened, and thus it can be used for a long time.

Since the heat generating means of a predetermined size is integrally mounted in the heating chamber in such a manner as to surround the periphery of the inside of the heating chamber without bending the heat generating means at a constant interval along the circumference of the inside of the heating chamber, It is possible to uniformly transmit the heat, thereby preventing the problem that the dimension of the metal is deformed or the quality is lowered, and the thermal efficiency is high.

1 is a perspective view showing a vacuum furnace according to an embodiment of the present invention;
2 is a cross-sectional view of one side of a body portion of a vacuum furnace according to an embodiment of the present invention.
3 is a cross-sectional view of the other side of a body portion of a vacuum furnace according to an embodiment of the present invention.
4 is a view for explaining a method of mounting a heat generating means according to an embodiment of the present invention in a vacuum furnace.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view showing a vacuum furnace 10 according to an embodiment of the present invention.

1, the vacuum furnace 10 of the present invention includes a front cover part 100, a body part 120, a rear cover part 110, a pressurizing vacuum 170, and a cooling water supply part (not shown) do.

The front cover part 100 is coupled to the body part 120 through the first and second engaging parts 130 and 140 and is coupled to the body part 120 so as to increase the degree of airtightness. A plurality of locking pieces 150 are formed and a second locking piece 160 corresponding to the first locking piece 150 is formed.

The body 120 is used to dissolve or heat the metal, and is coupled to the front cover 100 at the front surface and to the rear cover 110 at the rear surface. Further, the body portion 120 includes a structure for heating the metal therein or for cooling the heated metal.

The cooling water supply unit (not shown) is for supplying cooling water to the inside of the body part 120. The cooling water supply part (not shown) is for cooling the inside of the body part 120 by a vacuum pressure, (Not shown).

The front cover part 100 is opened and the metal is positioned inside the body part 120 and then the front cover part 100 is closed and the pressurizing vacuum chamber 170 is closed, And pressurizes the inside of the body part 120 with a vacuum pressure. Thereafter, electric power is applied to the heat generating means to dissipate heat, thereby raising the temperature inside the body portion 120 to dissolve or heat the metal.

FIG. 2 is a cross-sectional view of one side of a body part 120 of a vacuum furnace according to an embodiment of the present invention, and FIG. 3 is a sectional view of the other side of a body part 120 of a vacuum furnace according to an embodiment of the present invention.

2 and 3 illustrate essential components for illustrating the main features of the present invention, and other components may be included in addition to the illustrated components.

3 is a cross-sectional view taken along the longitudinal direction (direction B) of the body portion 120 of the vacuum furnace according to the present invention. FIG. 2 is a cross-sectional view of the body portion 120 of the vacuum furnace of the present invention in the width direction . ≪ / RTI >

Referring to FIG. 2, a heating chamber 200 and first and second chilled air supply units 250 and 260 are provided in a vacuum chamber body 120 of the present invention.

A metal is placed inside the heating chamber 200, and heat treatment is performed on the metal by using heat and cool air. The heating chamber 200 is heated to a temperature of 1200 ° C or more and power is applied to the heating unit 270 so that the inside of the heating chamber 200 may include the insulating members 210 and 230 and the heat resistant members 220 and 240. In this case, the insulating members 210 and 230 are formed of ceramic wool, and the heat-resistant members 220 and 240 may be formed of a carbon sheet and a carbon board. Preferably, the first insulating member 210 is made of ceramic wool. And a second insulating member 230 made of ceramic wool is coupled to the inner circumferential surface of the first heat resistant member 220 and a second insulating member 230 made of a carbon board And a second heat resistant member 240. The ceramic wool, the carbon sheet, and the carbon board are preferably made of materials capable of withstanding temperatures of about 1,400 ° C, and the order of the carbon sheet and the carbon board may be changed.

In the present invention, the heat generating means 270 includes a plurality of small-sized heat generating means arranged at regular intervals along the width direction of the main body in the heating chamber 200 And is not provided in the heating chamber 200 but is formed so as to surround the inside of the heating chamber 200 by bending one heat generating means 270 from one end toward the other end.

For example, one heating means 270 is bent from one end to the other end so as to surround the periphery of the circumference of the main body in the heating chamber 200. In this way, a plurality of heating means 270 are provided in the heating chamber 200, (200) at predetermined intervals along the longitudinal direction of the circumference. The heating unit 270 is integrally formed in the width direction of the circumference of the heating chamber 200.

In addition, the heat generating means 270 may be formed in the form of a plate or a kanthal material. In the case of a cantilever material, kanthal-APM, kanthal-Al and kanthal-AF may be used. The heating unit 270 is coupled to the heating chamber 200 through a plurality of heating unit coupling units 280. The heating unit coupling unit 280 will be described in detail with reference to FIG.

The first and second cool air supply units 250 and 260 supply cool air to the heating chamber 200. The first cool air supply unit 250 is provided in the longitudinal direction of the body unit 120, And supplies the cool air generated in the cooling space (not shown) to the heating chamber 200. At this time, the air heated in the heating chamber 200 moves to a cooling space (not shown) through a cooling pipe (not shown), and the cold air moved to a cooling space (not shown) .

The second cool air supply unit 260 is provided in the width direction of the body 120 and penetrates the heating chamber 200 to supply the cool air supplied from the first cool air supply unit 250 into the heating chamber 200. The first and second cold air supply units 250 and 260 may be formed in a tube shape and may be provided at predetermined intervals around the outer circumference of the heating chamber 200.

3, the body 120 includes first and second chilled air supply units 250 and 260, twelve heat generating units 270 in the longitudinal direction of the heating chamber 200, 270 are provided in the width direction along the periphery of the inside of the heating chamber 200 as shown in FIG. 3, each of the heat generating units 270 is provided in a region other than the region where the second cool air supplying unit 260 is provided.

4 is a view for explaining a method of mounting the heating unit 270 to the heating chamber 200 according to an embodiment of the present invention.

4, the heating unit 270 is coupled to the heating chamber 200 through the heating unit coupling unit 280. The heating unit coupling unit 280 may be formed of a ceramic insulator.

The heating unit coupling unit 280 includes a first heating unit coupling unit 420 coupled to the heating chamber 200, a second heating unit coupling unit 410 coupled to the heating unit 270, And a third heating unit coupling unit 400 coupled to the second heating unit 410. The fourth heat generating means coupling portion 430 and the fourth heat generating means coupling portion 430 which are coupled to the heating chamber 200 through the first to third heat generating means coupling portions 400, And a unit combining unit 440.

In this case, the first and second heating unit coupling parts 410 and 420 may be integrally formed, and the fourth heating part coupling part 430 may be coupled to the heating chamber 200 by pin welding or the like, The unit coupling portion 440 may be coupled to the fourth heat generating means coupling portion 430 by screwing or the like.

For example, a method of joining the heating unit 270 through the heating unit coupling unit 280 will be described. After the fourth heating unit coupling unit 430 is coupled to the heating chamber 200 by pin welding, The through holes of the second heat generating means coupling portions 410 and 420 are fitted to the fourth heat generating means coupling portion 430 so that the first heat generating means coupling portion 420 is coupled to the heating chamber 200 and the second heat generating means coupling portion 410) to the first heating means coupling portion (420). The through holes of the heat generating means 270 are inserted into the second heat generating means coupling portion 410 and the through holes of the third heat generating means coupling portion 400 are inserted into the fourth heat generating means coupling portion 430, The unit coupling portion 440 is engaged with the fourth heat generating means coupling portion 430 by screwing.

On the other hand, since the heat generating means 270 is formed with a through-hole for coupling with the second heat generating means coupling portion 410, the amount of heat generated is reduced. Therefore, it is necessary to supplement the reduced heating value, so that the supplementary heating device 450 of a predetermined size can be coupled to the second heating device coupling part 410 together with the heating device 270. The supplementary heat generating means 450 has the same shape as the same material as the heat generating means 270, but the size can be smaller than that of the heat generating means 270.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, and equivalents thereof.

120: body part 200: heating chamber
210, 230: Insulation member 220, 240:
250, 260: cold air supply unit 270:
280: Heating unit coupling part

Claims (8)

In a vacuum furnace,
A body portion that engages with at least one of the front cover portion and the rear cover portion;
A heating chamber provided in the body for heat treating the metal;
And a plurality of heating means provided in the heating chamber to radiate heat, wherein each of the heating means includes a heating means for heating a single heating means from one end toward the other end so as to surround the inner circumference of the heating chamber, in. The method according to claim 1,
Wherein each of the heating units is provided to surround the inner circumference of the heating chamber along a width direction thereof and is provided at predetermined intervals along a longitudinal direction of the inner circumference of the heating chamber. The method according to claim 1,
Wherein the heat generating means is a plate-shaped vacuum furnace. The method according to claim 1,
The heating means comprises a Kanthal material. The method according to claim 1,
Each of the heating means is mounted inside the heating chamber through a heating means coupling portion,
And a separate heating unit of a predetermined size is further coupled to a portion where the heating unit and the heating unit are coupled. 6. The method of claim 5,
Wherein the heat generating means coupling portion is made of a ceramic insulator material. The method according to claim 1,
Wherein the heating chamber is composed of a heat-resistant member composed of a carbon sheet and a carbon board, and an insulating member composed of ceramic wool. 8. The method of claim 7,
Wherein the heating chamber includes a first heat-resistant member formed of a carbon sheet and a second heat-insulating member formed of ceramic wool. The first heat-resistant member is made of a carbon sheet and the inner surface of the first insulating member is made of ceramic wool. And a second heat resistant member composed of a carbon board on the inner peripheral surface of the member.

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