KR20040001663A - an induction hardening apparatus for press mold - Google Patents

an induction hardening apparatus for press mold Download PDF

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Publication number
KR20040001663A
KR20040001663A KR1020020036952A KR20020036952A KR20040001663A KR 20040001663 A KR20040001663 A KR 20040001663A KR 1020020036952 A KR1020020036952 A KR 1020020036952A KR 20020036952 A KR20020036952 A KR 20020036952A KR 20040001663 A KR20040001663 A KR 20040001663A
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South Korea
Prior art keywords
cooling water
temperature
press mold
coolant
water tank
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KR1020020036952A
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Korean (ko)
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김덕환
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현대자동차주식회사
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Priority to KR1020020036952A priority Critical patent/KR20040001663A/en
Publication of KR20040001663A publication Critical patent/KR20040001663A/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE: An apparatus for high frequency quenching press mold is provided which obtains quenching surface of high quality so that it is not necessary to perform reheat treatment by proceeding heat treatment in the state that the press mold is completely dipped into cooling water and does not spray cooling water to prevent cooling water from splashing into working space. CONSTITUTION: The apparatus comprises a work coil(4) which is movable on an upper part of the press mold(3), and through which high frequency current flows; a cooling water tank(6) in which cooling water is contained, and which has such a size that the press mold(3) is completely dipped into cooling water; and a temperature control unit(7) for constantly maintaining temperature of the cooling water contained in the cooling water tank(6), wherein the temperature control unit(7) comprises a cooler(7c) connected to the cooling water tank(6) by discharge pipe(7a) and inflow pipe(7b); valves(7d,7e) and pump(7f) installed on the discharge pipe(7a) and inflow pipe(7b); a temperature sensor(7g) installed on an inner part of the cooling water tank(6); and a control unit(7h) for turning the cooled water back to the cooling water tank(6) again after opening the valves(7d,7e), operating the pump(7f), thereby flowing cooling water of high temperature contained in the cooling water tank(6) in the cooler(7c) so that the cooling water of high temperature is cooled in the cooler(7c) if temperature values of cooling water measured through the temperature sensor(7g) are the same as or more than a set temperature value (upper limit value) and stopping circulation of cooling water by closing the valves(7d,7e) and stopping operation of the pump(7f) if the temperature values of cooling water measured through the temperature sensor(7g) are the same as or less than a set temperature value (lower limit value).

Description

프레스 금형 고주파 담금질 장치{an induction hardening apparatus for press mold}Induction hardening apparatus for press mold

본 발명은 고주파 담금질 장치에 관한 것으로, 특히 강판을 절단 및 성형하는 프레스 금형의 표면을 경화시키는데 이용되는 프레스 금형 고주파 담금질 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency quenching apparatus, and more particularly, to a press die high frequency quenching apparatus used to harden the surface of a press die for cutting and forming a steel sheet.

일반적으로 프레스 금형은 완성품의 외곽 형상대로 절단된 평면 상태의 강판을 상형과 하형 사이에 위치시키고 가압하여 원하는 형상대로의 절곡단면을 가지도록 성형하는데 사용된다.In general, the press die is used to form a steel sheet in a flat state cut to the outer shape of the finished product between the upper and lower molds and pressurized to have a bent section in a desired shape.

따라서 상기 프레스 금형의 표면 즉, 상기 강판과 직접 접촉하는 표면은 내마모성 및 내피로성이 우수할 것이 요구된다.Therefore, the surface of the press die, that is, the surface in direct contact with the steel sheet is required to be excellent in wear resistance and fatigue resistance.

따라서 상기 프레스 금형의 표면 경도를 향상시키기 위해서 열처리를 하게 되는데 주로 고주파 담금질(induction hardening)법을 많이 사용한다.Therefore, heat treatment is performed in order to improve the surface hardness of the press die, and mainly a high frequency induction hardening method is used.

상기 고주파 담금질법이란, 도 1에 도시된 바와 같이, 고주파 전류가 흐르는 코일(1)에 근접된 전도체(2)에 유도전류(I)가 발생하여 이 유도전류(I)에 의해 전도체(2)에 자체적으로 열이 발생되는 현상을 이용한 것으로, 이와 같이 가열된 부분을 급냉시킴으로써 전도체(2)의 표면에 마르텐사이트 조직을 형성시켜 표면이 경화되는 담금질 효과를 얻을 수 있도록 된 열처리 방법을 말한다.In the high frequency quenching method, as shown in FIG. 1, an induction current (I) is generated in a conductor (2) adjacent to a coil (1) through which a high frequency current flows. The heat generating method itself is used, and this refers to a heat treatment method in which a quenching effect of hardening the surface is obtained by forming a martensite structure on the surface of the conductor 2 by quenching the heated portion.

이와 같은 방법을 이용하여 프레스 금형의 표면을 담금질 하기 위한 종래의 장치는 도 2에 도시된 바와 같이, 프레스 금형(3 ; 스틸재질로 제작되어 도 1에서 전도체에 해당된다.)의 상부를 이동할 수 있는 워크코일(work coil ; 4)과, 이 워크코일(4)과 동시에 이동되는 냉각수 분사노즐(5)을 포함하여 이루어진다.(예를 들어, 자동차의 바디패널을 성형하는 프레스 금형의 경우 그 크기가 매우 커서 한번에 전체 표면을 담금질 할 수 없으므로 워크코일과 상기 냉각수 분사노즐을 이동시키면서 작업을 진행한다.)Conventional apparatus for quenching the surface of the press die using this method, as shown in Figure 2, can move the upper portion of the press mold (3 (made of steel material and corresponds to the conductor in Figure 1)). A work coil (4) and a coolant jet nozzle (5) moving simultaneously with the work coil (4) (e.g., in the case of a press mold for forming a body panel of an automobile) Is very large so that the entire surface cannot be quenched at once, so move the work coil and the coolant spray nozzle.

따라서, 상기 워크코일(4)에 고주파 전류를 흘려주면 이에 근접한 프레스 금형(3)의 표면이 유도전류에 의한 발열로 가열되고, 여기에 상기 냉각수 분사노즐(5)을 통해 냉각수(물+오일의 상태; 상온의 순수 물을 직접 분사하면 지나치게 급랭되어 금형의 표면에 크랙이 발생하는바, 적정 온도의 오일을 섞어서 사용한다.)를 분사하여 가열된 표면을 냉각시킴으로써 해당 표면을 담금질할 수 있으며, 이와 같은 과정이 상기 워크코일(4) 및 냉각수 분사노즐(5)의 이동에 따라 연속적으로 이루어짐으로써 프레스 금형(3)의 표면 전체를 담금질할 수 있게 된다.Therefore, when a high frequency current flows into the work coil 4, the surface of the press mold 3 adjacent to the work coil 4 is heated by heat generated by an induction current, and the coolant (water + oil) State; direct injection of pure water at room temperature may cause excessive quenching and cracks on the surface of the mold, and may be mixed with oil of appropriate temperature) to cool the heated surface to quench the surface. Such a process is continuously performed according to the movement of the work coil 4 and the cooling water injection nozzle 5, so that the entire surface of the press die 3 can be quenched.

그런데, 상기와 같은 종래의 장치에서는 워크코일(4)과 함께 냉각수 분사노즐(5)이 이동하므로 프레스 금형(3)의 가열된 표면이 일시적으로 냉각될뿐 급랭작용이 지속적으로 이루어지지 못하여 마르텐사이트 조직의 생성량이 미미함으로써 충분한 경도 상승 효과를 얻지 못하는 문제점이 있었다.However, in the conventional apparatus as described above, since the cooling water injection nozzle 5 moves together with the work coil 4, the heated surface of the press die 3 is temporarily cooled, but the quenching operation is not continuously performed. There was a problem in that a sufficient amount of hardness synergistic effect was not obtained because the amount of tissue produced was small.

또한, 상기 냉각수 분사노즐(5)을 통한 냉각수의 분사각도가 조금만 틀어져도 가열된 표면을 정확히 냉각시킬 수 없어 가열 표면의 냉각이 균일하게 이루어지지 않게 되며, 이에 따라 전체적으로 경도가 저하되고 부분적으로 재열처리를 실시해야 하는 등 열처리 품질이 크게 떨어지게 되는 문제점도 있었다.In addition, even if the spray angle of the coolant through the coolant spray nozzle 5 is slightly twisted, the heated surface cannot be cooled accurately, so that the cooling of the heated surface is not uniformly performed. There was also a problem that the quality of heat treatment is greatly reduced, such as the need to perform heat treatment.

또한, 냉각을 위해 프레스 금형(3)의 표면으로 분사된 냉각수가 작업 공간의 사방으로 튀어 작업 공간을 쉽게 오염시킴으로써 작업 종료 후 이를 제거하는데 적지 않은 노력과 시간이 드는 단점이 있었다.In addition, the cooling water sprayed onto the surface of the press mold 3 for cooling, splashing in all directions of the working space to easily contaminate the working space, there is a disadvantage that takes a lot of effort and time to remove it after the end of the work.

이에 본 발명은 상기와 같은 문제점들을 해결하기 위해 안출된 것으로, 냉각수에 의한 냉각작용이 가열표면을 전체적으로 균일하고 충분한 시간동안 냉각시킬 수 있게 됨으로써 프레스 금형의 열처리 대상 표면 전체에 충분한 경도의 균일한 담금질면을 얻을 수 있으며, 이에 따라 재열처리 작업을 실시할 필요가 없게 되고, 또한, 냉각수가 작업공간으로 튀지 않게 됨으로써 작업 종료후 청소를 위한 시간과 노력이 소모되지 않도록 된 프레스 금형 고주파 담금질 장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, the cooling action by the cooling water is able to cool the heating surface as a whole and for a sufficient time, thereby uniform quenching of sufficient hardness over the entire heat treatment target surface of the press die It is possible to obtain a cotton, thereby eliminating the need for reheating work, and also to provide a press mold high-frequency quenching device in which the cooling water does not splash into the work space so that time and effort for cleaning after the work is not consumed. Has its purpose.

도 1은 고주파 담금질의 원리를 설명하기 위한 도면,1 is a view for explaining the principle of high frequency quenching,

도 2는 종래 기술에 따른 프레스 금형 고주파 담금질 장치의 구성도,2 is a configuration diagram of a press mold high frequency quenching apparatus according to the prior art,

도 3은 본 발명에 따른 프레스 금형 고주파 담금질 장치의 구성도이다.3 is a block diagram of a press die high frequency quenching apparatus according to the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

3 : 프레스 금형,4 : 워크코일,3: press mold, 4: work coil,

6 : 냉각수통,7 : 온도조절장치,6: cooling water container, 7: temperature control device,

7a : 배출관,7b : 유입관,7a: discharge pipe, 7b: inlet pipe,

7c : 냉각기,7d,7e : 밸브,7c: cooler, 7d, 7e: valve,

7f : 펌프,7g : 온도센서,7f: pump, 7g: temperature sensor,

7h : 제어유니트.7h: control unit.

상기와 같은 목적을 달성하기 위한 본 발명은, 프레스 금형의 상부를 이동할 수 있으며 고주파 전류가 흐르는 워크코일과, 냉각수가 담겨지고 이 냉각수에 상기 프레스 금형이 완전히 잠겨질 수 있는 크기를 가지는 냉각수통과, 이 냉각수통에 담겨진 상기 냉각수의 온도를 일정하게 유지하는 온도조절장치를 포함하여 이루어진다.The present invention for achieving the above object, the work coil which can move the upper portion of the press mold and a high-frequency current flows, and a cooling water container containing a cooling water and the size of the press mold can be completely locked to the cooling water, It comprises a temperature control device for maintaining a constant temperature of the cooling water contained in the cooling water container.

즉, 프레스 금형이 냉각수에 완전히 잠겨진 상태에서 작업을 진행함으로써 유도전류에 의해 가열된 표면 전체가 항상 균일하고 충분하게 냉각될 수 있도록 되어 있으며, 또한 냉각수가 작업공간으로 튀지 않게 됨으로써 작업공간의 오염을 막을 수 있도록 된 것이다.That is, the press mold is completely submerged in the coolant so that the entire surface heated by the induction current can be cooled uniformly and sufficiently at all times. Also, the coolant does not splash into the work space, thereby preventing contamination of the work space. It is to be prevented.

이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

도 3은 본 발명에 따른 프레스 금형 고주파 담금질 장치의 구성도로서, 상기 냉각수통(6)은 상부가 개방된 큰 통이며, 상기 프레스 금형(3)을 수용할 수 있는 충분한 크기를 가진다.3 is a configuration diagram of a press die high frequency quenching apparatus according to the present invention, wherein the cooling water container 6 is a large cylinder having an open top, and has a sufficient size to accommodate the press mold 3.

상기 프레스 금형(3)은 냉각수통(6)에 넣어질 때 냉각수에 완전히 잠기도록 넣어진다.The press mold 3 is put in the cooling water container 6 so as to be completely immersed in the cooling water.

이러한 상태의 냉각수 유면 근접 상부에 상기 워크코일(4)이 위치된다. 즉, 프레스 금형(3)과 워크코일(4)의 사이에 냉각수 유면이 존재하는 상태로서 프레스 금형(3)과 워크코일(4) 간의 거리는 종래와 동일하다.The work coil 4 is located above the coolant oil level in this state. That is, the distance between the press die 3 and the work coil 4 is the same as in the state where the coolant oil level exists between the press die 3 and the work coil 4.

유도전류는 고주파 전류에 의해 근접 전도체에 자속이 집중되어 발생하는 것이므로, 워크코일(4)과 프레스 금형(3)의 사이에 냉각수층이 존재하는것과는 무관하게 상기 워크코일(4)에 고주파 전류를 흘려주면 프레스 금형(3)의 표면에는 유도전류가 발생되고, 이에 의해 생성된 열에 의해 프레스 금형(3)의 표면은 가열된다.Since the induced current is generated by the magnetic flux concentrated in the adjacent conductor by the high frequency current, the high frequency current is applied to the work coil 4 regardless of whether a coolant layer exists between the work coil 4 and the press die 3. When it flows, an induction electric current generate | occur | produces on the surface of the press die 3, and the surface of the press die 3 is heated by the heat produced by this.

이때 상기 프레스 금형(3)은 냉각수에 완전히 잠겨 있으므로 가열된 표면은 전체적으로 균일하게 냉각되며, 상기 워크코일(4)이 이동되어도 종래와 같이 냉각수 분사노즐(5)이 같이 이동되어 냉각작용이 중지되는 것이 아니라 지속적으로 냉각작용이 일어나게 된다.At this time, since the press mold 3 is completely immersed in the coolant, the heated surface is uniformly cooled as a whole. Even though the work coil 4 is moved, the coolant injection nozzle 5 is moved together as in the related art, and thus the cooling operation is stopped. Instead, cooling continues to occur.

따라서, 프레스 금형(3)의 표면에는 전체적으로 마르텐사이트 조직이 균일하고도 충분히 형성되어 목적한 바의 경도 상승 효과를 얻을 수 있으며, 더불어 재열처리를 할 필요도 없게 된다.Accordingly, the martensite structure is uniformly and sufficiently formed on the surface of the press die 3 to obtain the desired effect of increasing the hardness, and there is no need to perform reheat treatment.

또한, 상기 냉각수는 분사노즐에 의해 프레스 금형(3)의 표면으로 분사되는 것이 아니므로 프레스 금형(3)의 표면에 충돌한뒤 작업공간의 사방으로 튀는 현상이 발생하지 않는다. 따라서, 냉각수에 의해 작업 공간이 더럽혀지지 않으므로 열처리 작업 종료 후 작업 공간 정리 작업이 매우 수월해진다.In addition, since the cooling water is not sprayed onto the surface of the press mold 3 by the spray nozzle, the cooling water does not occur after colliding with the surface of the press mold 3 and splashing in all directions of the working space. Therefore, since the work space is not polluted by the cooling water, the work space cleanup work becomes very easy after the heat treatment work is finished.

한편, 상기 냉각수는 냉각수통(6)에 담겨진 상태로서 그 양에 변화가 없기 때문에 열처리 작업의 시간이 경과함에 따라 가열 표면으로부터 열을 흡수하여 온도가 상승하게 된다.On the other hand, since the cooling water is contained in the cooling water container 6 and there is no change in the amount, the cooling water absorbs heat from the heating surface and the temperature rises as the heat treatment time elapses.

이와 같이, 냉각수의 온도가 상승하면 냉각효율이 떨어지고, 이에 따라 프레스 금형(3) 표면의 경화품질도 저하되기 때문에 본 발명은 냉각수의 온도를 일정한 수준으로 유지하기 위한 온도조절장치(7)를 구비한다.As such, when the temperature of the cooling water rises, the cooling efficiency decreases, and accordingly, the curing quality of the surface of the press die 3 also decreases, and thus the present invention includes a temperature controller 7 for maintaining the temperature of the cooling water at a constant level. do.

상기 온도조절장치(7)는 배출관(7a)과 유입관(7b)을 매개로 냉각수통(6)과 연결된 냉각기(7c)와, 상기 배출관(7a)과 유입관(7b)에 설치된 밸브(7d,7e)들 및 펌프(7f), 상기 냉각수통(6)의 내부에 설치되어 냉각수의 온도를 감지하는 온도센서(7g), 이 온도센서(7g)를 통해 측정된 냉각수의 온도에 따라 상기 밸브(7d,7e)들 및 펌프(7f)를 작동시켜 냉각수통(6)내의 고온 냉각수를 냉각기(7c)로 유입시켜 냉각시킨뒤 다시 냉각수통(6)으로 돌려 보내는 제어유니트(7h)로 구성된다.The temperature control device (7) is a cooler (7c) connected to the cooling water tank (6) via the discharge pipe (7a) and the inlet pipe (7b), and the valve (7d) installed in the discharge pipe (7a) and the inlet pipe (7b) And 7e) and a pump 7f, a temperature sensor 7g installed inside the cooling water container 6 to sense the temperature of the cooling water, and the valve according to the temperature of the cooling water measured by the temperature sensor 7g. (7d, 7e) and a control unit (7h) to operate the pump (7f) to flow the high temperature cooling water in the cooling water tank (6) to the cooler (7c) to cool and then back to the cooling water tank (6h) .

따라서, 열처리 작업이 지속되어 냉각수통(6)내 냉각수의 온도가 설정값(상한값) 이상으로 상승되면 제어유니트(7h)는 상기 밸브(7d,7e)들을 열고 펌프(7f)를 작동시켜 냉각기(7c) 내의 냉각수를 배출관(7a)을 통해 냉각수통(6)으로 공급하고, 유입관(7b)을 통해 냉각수통(6)내의 냉각수를 냉각기(7c)내로 흡입하여 냉각시킴으로써 지속적으로 냉각된 냉각수를 냉각수통(6)으로 공급한다.Therefore, when the heat treatment operation is continued and the temperature of the coolant in the coolant container 6 rises above the set value (upper limit), the control unit 7h opens the valves 7d and 7e and operates the pump 7f to cool the cooler ( The cooling water in 7c) is supplied to the cooling water tank 6 through the discharge pipe 7a, and the cooling water continuously cooled by sucking and cooling the cooling water in the cooling water tank 6 into the cooler 7c through the inlet pipe 7b. Supply to the cooling water container (6).

따라서, 상기 과정의 반복에 의해 상승된 냉각수통(6) 내의 냉각수 온도는 다시 낮아지게 된다.Therefore, the cooling water temperature in the cooling water tank 6 raised by repetition of the above process is lowered again.

이후, 냉각수통(6)내 냉각수의 온도가 설정값(하한값) 이하로 떨어지게 되면상기 제어유니트(7h)는 펌프(7f)의 작동을 중지시키고, 각 밸브(7d,7e)들을 닫아 냉각수의 순환을 정지시킴으로써 더 이상 냉각수가 냉각되는 것을 막는다.Thereafter, when the temperature of the coolant in the coolant container 6 falls below the set value (lower limit value), the control unit 7h stops the operation of the pump 7f and closes the valves 7d and 7e to circulate the coolant. Stops the cooling water from further cooling.

이와 같이, 상기와 같은 온도조절장치(7)의 작용을 통하여 냉각수통(6)내의 냉각수 온도가 항상 일정 수준으로 유지됨으로써 열처리 과정중 양호한 냉각성능을 유지하게 된다.As such, the temperature of the cooling water in the cooling water container 6 is always maintained at a constant level through the action of the temperature adjusting device 7 as described above, thereby maintaining good cooling performance during the heat treatment process.

이상 설명한 바와 같이 본 발명에 따르면, 프레스 금형이 냉각수통내 냉각수에 완전히 잠긴 상태에서 열처리 작업이 진행됨으로써 가열 표면의 냉각이 전체적으로 고르고 충분하게 이루어져 양질의 담금질면을 얻을 수 있게 되고, 이에 따라 재열처리를 실시할 필요가 없게 되는 효과가 있다.As described above, according to the present invention, the heat treatment is performed while the press die is completely immersed in the cooling water in the cooling water tank, so that the cooling of the heating surface is uniform and sufficient to obtain a good quenched surface. There is an effect that it is not necessary to carry out.

또한, 냉각수를 분사하지 않으므로 냉각수가 작업공간으로 튀지 않게 됨으로써 열처리 작업 종료후 주변 정리 작업이 수월해지는 장점이 있다.In addition, since the cooling water is not sprayed into the working space because the cooling water is not injected, there is an advantage in that the peripheral cleaning work after the heat treatment operation is facilitated.

Claims (2)

프레스 금형(3)의 상부를 이동할 수 있으며 고주파 전류가 흐르는 워크코일(4)과, 냉각수가 담겨지고 이 냉각수에 상기 프레스 금형(3)이 완전히 잠겨질 수 있는 크기를 가지는 냉각수통(6)과, 이 냉각수통(6)에 담겨진 상기 냉각수의 온도를 일정하게 유지하는 온도조절장치(7)를 포함하여 구성되는 프레스 금형 고주파 담금질 장치.A work coil 4 capable of moving the upper portion of the press die 3 and having a high frequency current flowing therein, a cooling water container 6 having a size in which cooling water is contained and in which the press mold 3 can be completely submerged; And a thermostat device (7) configured to maintain a constant temperature of the cooling water contained in the cooling water container (6). 제 1항에 있어서, 상기 온도조절장치(7)는 배출관(7a)과 유입관(7b)으로 냉각수통(6)에 연결된 냉각기(7c)와, 상기 배출관(7a)과 유입관(7b)에 설치된 밸브(7d,7e)들 및 펌프(7f), 상기 냉각수통(6)의 내부에 설치된 온도센서(7g), 이 온도센서(7g)를 통해 측정된 냉각수의 온도가 설정치(상한값) 이상이면 상기 밸브(7d,7e)를 열고 펌프(7f)를 작동시켜 냉각수통(6)내의 고온 냉각수를 냉각기(7c)로 유입시켜 냉각시킨뒤 다시 냉각수통(6)으로 돌려 보내고, 측정된 냉각수의 온도가 설정치(하한치) 이하이면 상기 밸브(7d,7e)를 닫고 펌프(7f)의 작동을 중지시켜 냉각수의 순환을 정지시키는 제어유니트(7h)로 구성되는 것을 특징으로 하는 프레스 금형 고주파 담금질 장치.According to claim 1, wherein the temperature control device (7) is a discharge pipe (7a) and the inlet pipe (7b) to the cooler (7c) connected to the cooling water tank (6), the discharge pipe (7a) and the inlet pipe (7b) When the installed valves 7d and 7e and the pump 7f, the temperature sensor 7g installed inside the cooling water container 6, and the temperature of the coolant measured by this temperature sensor 7g are above the set value (upper limit), The valves 7d and 7e are opened and the pump 7f is operated to inject the high temperature coolant in the coolant container 6 into the cooler 7c, cool it, and then return it to the coolant container 6 to return the measured coolant temperature. Press mold high frequency quenching device, characterized in that it comprises a control unit (7h) to close the valve (7d, 7e), stop the operation of the pump (7f) to stop the circulation of the coolant when the value is equal to or less than the set value (lower limit).
KR1020020036952A 2002-06-28 2002-06-28 an induction hardening apparatus for press mold KR20040001663A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103103325A (en) * 2013-02-05 2013-05-15 岳睿 Collision prevention device for mechanical part after heat treatment
KR101633284B1 (en) 2015-06-29 2016-06-27 주식회사 화신테크 Teaching high-frequency heat treatment jig unit of surface precision mold shape
CN113337681A (en) * 2021-05-28 2021-09-03 济南市东康金属制品有限公司 Heat treatment processing device for uniformly cooling PC steel bar

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EP0770439A1 (en) * 1995-10-27 1997-05-02 Sintokogio, Ltd. A method and apparatus for manufacturing gas-hardening molds
KR20010069859A (en) * 2001-05-15 2001-07-25 강신만 Method and system of treatmenting surface
JP2001226714A (en) * 2000-02-10 2001-08-21 Aisin Seiki Co Ltd High-frequency hardening method for metal mold and high-frequency hardening and heating device for metal mold usable for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770439A1 (en) * 1995-10-27 1997-05-02 Sintokogio, Ltd. A method and apparatus for manufacturing gas-hardening molds
JP2001226714A (en) * 2000-02-10 2001-08-21 Aisin Seiki Co Ltd High-frequency hardening method for metal mold and high-frequency hardening and heating device for metal mold usable for the same
KR20010069859A (en) * 2001-05-15 2001-07-25 강신만 Method and system of treatmenting surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103103325A (en) * 2013-02-05 2013-05-15 岳睿 Collision prevention device for mechanical part after heat treatment
KR101633284B1 (en) 2015-06-29 2016-06-27 주식회사 화신테크 Teaching high-frequency heat treatment jig unit of surface precision mold shape
CN113337681A (en) * 2021-05-28 2021-09-03 济南市东康金属制品有限公司 Heat treatment processing device for uniformly cooling PC steel bar

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