KR20050087765A - Linear induction heating coil tool for plate bending - Google Patents

Linear induction heating coil tool for plate bending Download PDF

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KR20050087765A
KR20050087765A KR1020050073157A KR20050073157A KR20050087765A KR 20050087765 A KR20050087765 A KR 20050087765A KR 1020050073157 A KR1020050073157 A KR 1020050073157A KR 20050073157 A KR20050073157 A KR 20050073157A KR 20050087765 A KR20050087765 A KR 20050087765A
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heating
heating coil
bending
plate
coil
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KR1020050073157A
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Korean (ko)
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KR100677465B1 (en
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이영화
장창두
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이영화
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/008—Bending sheet metal along straight lines, e.g. to form simple curves combined with heating or cooling of the bends

Abstract

선박용 외판이나 기타 건축용 강판을 굽히는 작업은 주로 기존의 프레스기계를 이용한 방법, 가스토오치에 의한 선상 가열법등이 주로 사용되어 왔다. 이중 프레스 기계를 이용한 방법은 굽힘 곡이 일차원인 간단한 경우에 사용되며 복잡한 2차원 굽힘 곡은 가스토오치에 의한 선상 가열법이 사용되어지고 있다. 그러나 가스토오치를 이용한 곡가공 방법이 작업자의 작업환경의 열악성과 가스라는 화학 에너지가 정확한 가열 입력인자로서 가공 조건의 데이터베이스화나 가공기계의 자동화에 난점으로 작용을 한다.Bending of ship's outer plate or other steel plate for construction has been mainly used by the existing press machine method and the linear heating method by gastorch. The method using the double press machine is used in the simple case where the bending curve is one-dimensional, and the linear heating method by the gas stove is used for the complex two-dimensional bending curve. However, the processing method using gas stove is a poor input of worker's working environment and chemical energy such as gas, which is an accurate heating input factor, which makes it difficult to make database of processing condition and automation of processing machine.

이에 현재 열처리나 가열로에 있어서 광범위하게 사용되고 있는 기존의 유도가열기를 이용하되 전원공급부에 연결되는 가열코일을 판의 곡(굽힘)가공에 부합하는 형상으로 개발하여 강판의 곡가공에 사용하고자한다.Therefore, by using existing induction heaters that are widely used in heat treatment or heating furnaces, the heating coil connected to the power supply is developed in a shape that matches the bending (bending) of the plate, and is used for the bending of steel sheets. .

유도가열기에 사용되는 전기에너지는 청정에너지로서 작업 시 소음이 전혀 발생하지 않으며, 정확한 입열량을 인가된 전기에너지에 의해 알기가 쉽고 또 이를 제어하기가 용이하며, 무엇보다도 에너지를 집중시켜 가공효율이 가스토오치 사용 시보다 매우 높다.The electric energy used in the induction heater is clean energy, which makes no noise during operation, and it is easy to know the exact amount of heat input by the applied electric energy, and it is easy to control it. This is much higher than when using the gas stove.

이렇듯 유도가열을 이용한 선상가열은 가스토치 이용 시에 비교하여 매우 큰 장점을 갖고 있으며 유도가열기의 구성은 유도전류를 발생시키는 전원장치부가 이에 연결된 가열코일에 유도전류를 흘려주면 이 가열코일 밑에 있는 철판에 2차 유도전류가 발생하고 이에 의해 코일 하면의 철판이 집중적으로 가열된 후 냉각수에 의해 냉각하면서 판의 굽힘이 일어나게 된다.Thus, in-line heating using induction heating has a great advantage compared to using gas stoves.The induction heater configuration has a power supply unit that generates an induction current when the induction current flows an induction current to the heating coil connected to the bottom of the heating coil. Secondary induction current is generated in the iron plate and thereby the iron plate on the lower surface of the coil is intensively heated, and the plate is bent while cooling by cooling water.

따라서 본 발명은 전원공급부와 가열코일로 구성되어 표면 열처리나 가열로로 쓰이고 있는 기존의 유도가열기를 이용하되 가열코일을 곡가공용에 부합하는 형상으로 개발하여 강판의 곡(굽힘)가공에 사용하고자 긴 막대 구조의 장형 코일 형상을 발명하였으며 이는 열원을 효과적으로 가열선의 방향으로 한꺼번에 집중시킴으로써 판의 굽힘 가공 시 매우 빠른 작업성을 보인다.Therefore, the present invention uses a conventional induction heater that is used as a surface heat treatment or a heating furnace composed of a power supply unit and a heating coil, but to develop the heating coil in a shape that is suitable for curved processing, and to be used for bending (bending) steel sheet. The long rod-shaped long coil shape has been invented, which effectively concentrates the heat source in the direction of the heating wire, thus showing very fast workability during bending of the plate.

Description

판 굽힘용 장형 유도 가열기 {Linear Induction Heating Coil Tool for Plate Bending}Linear Induction Heating Coil Tool for Plate Bending}

선박용 외판이나 기타 건축용 강판을 굽히는 작업에 있어 크게 프레스기계를 이용한 방법, 가스토오치에 의한 선상 가열법등이 주로 사용되어 왔다. 이중 프레스 기계를 이용한 방법은 굽힘 곡이 일차원인 간단한 경우에 사용되며 복잡한 2차원 굽힘 곡은 가스토오치에 의한 선상 가열법이 사용되어지고 있다. 그러나 가스토오치를 이용한 곡가공 방법이 작업자의 작업환경의 열악성과 가스라는 화학 에너지가 정확한 가열 입력인자로서 데이터베이스화나 자동화에 난점으로 작용을 하므로 좀더 이에 유용한 에너지원인 유도가열기를 곡가공에 이용하고자 하는 필요성이 제기되었다. 실제 유도가열기는 현재 열처리나 가열로에 있어서는 광범위하게 사용되고 있으며 유럽에서는 이미 곡가공용 선상가열기로도 사용이 되고 있는 실정이나 현재 국내에서는 아직까지 곡가공용으로는 사용이 되고 있지 않는 실정이다. 유도가열기에 사용되는 전기에너지는 청정에너지로서 작업시 소음이 전혀 발생하지 않으며, 정확한 입열량을 알기가 쉽고 또 이를 제어하기가 용이하며, 무엇보다도 에너지를 집중시켜 가공효율이 가스토오치 사용 시보다 매우 높다.In the work of bending the outer shell of ships or other steel plates for construction, the press machine method and the linear heating method by gasstoch have been mainly used. The method using the double press machine is used in the simple case where the bending curve is one-dimensional, and the linear heating method by the gas stove is used for the complex two-dimensional bending curve. However, since the processing method using gas stove is a poor input of worker's working environment and chemical energy of gas as a precise heating input factor, it acts as a difficulty for database or automation, so induction heater, which is a more useful energy source, is used for processing. The need was raised. Actually, induction heaters are widely used in heat treatment and heating furnaces, and are already used in shipboard heating machines in Europe, but are not currently used in grain processing in Korea. The electric energy used in the induction heater is clean energy, which makes no noise during operation, and it is easy to know the exact amount of heat input and easy to control it. Everything is very high.

이렇듯 유도가열을 이용한 선상가열은 가스토치 이용 시에 비교하여 매우 큰 장점을 갖고 있으며 유도가열기의 구성은 유도전류를 발생시키는 전원장치부가 이에 연결된 가열코일에 유도전류를 흘려주면 이 가열코일 밑에 있는 철판에 2차 유도전류가 발생하고 이에 의해 코일 하면의 철판이 집중적으로 가열되어 냉각하면서 판의 굽힘이 일어나게 된다.Thus, in-line heating using induction heating has a great advantage compared to using gas stoves.The induction heater configuration has a power supply unit that generates an induction current when the induction current flows an induction current to the heating coil connected to the bottom of the heating coil. Secondary induction current is generated in the iron plate, thereby causing the iron plate on the lower surface of the coil to be heated and cooled while bending of the plate.

따라서 본 발명은 전원공급부와 가열코일로 구성되어 열처리니 가열로로 쓰이고 있는 기존의 유도가열기를 이용하되 가열코일을 곡가공용에 부합하는 형상으로 개발하여 강판의 곡가공에 사용하고자한다.Therefore, the present invention intends to use the conventional induction heater, which is composed of a power supply unit and a heating coil, which is used as a heat treatment knee heating furnace, to develop a heating coil into a shape that is suitable for curved processing, and to be used in the processing of steel sheet.

이러한 가열코일은 두가지 형상이 가능하며 그중 하나는 기존의 가스토오치와 같이 한 명의 작업자가 가공이 가능한 원형 코일 형상이다. 이는 두 개의 지지캐스터와 한 개의 구동 모터에 판과 가열 코일의 간격을 원하는 만큼 조절한 후 자동으로 가열선을 따라 가열하는 시스템이며 두 번째 형상은 긴 막대 구조의 장형 코일 형상으로 열원을 효과적으로 가열선의 방향으로 한꺼번에 집중시킴으로써 판의 굽힘 가공 시 매우 빠른 작업성을 보인다. 여기서 두 번째 형상인 장형코일을 발명하여 청구하게 되었다.These heating coils are available in two shapes, one of which is a circular coil shape that can be processed by one operator like the conventional gas stove. This is a system that automatically adjusts the distance between the plate and heating coil to two support casters and one drive motor as desired and then automatically heats it along the heating wire. The second shape is a long coil shaped long coil which effectively removes the heat source. By concentrating in one direction, it shows very fast workability when bending plate. Here, the second shape of the long coil was invented and claimed.

현재 열처리나 가열로에 있어서 광범위하게 사용되고 있는 기존의 유도가열기를 이용하되 전원공급부에 연결되는 가열코일을 판의 곡(굽힘)가공에 부합하는 형상으로 개발하여 강판의 곡가공에 사용하고자한다. 구체적으로 'ㄷ'자 형상의 가열코일, 가열코일을 위부분과 측면을 감싸는 코아, 두개의 일자형 냉각코일 및 가열 코일 하면의 간격 유지기로 구성되는 장형코일로서 이 코일의 밑면에 판을 두어 가열 및 냉각 과정을 통해 판을 굽히는 작용을 하는 장치를 발명하여 기존의 곡가공 방법인 가스토오치에 의한 방법을 대체할 수 있는 효율적인 곡가공 기계를 구현하고자 함.The current induction heater, which is widely used in heat treatment or heating furnaces, is used, but the heating coil connected to the power supply is developed in a shape that matches the bending (bending) of the plate, and is used for the bending of steel sheets. Specifically, a long coil consisting of a 'c' shaped heating coil, a core covering the upper and side surfaces of the heating coil, two straight cooling coils, and a space holder on the lower surface of the heating coil. By inventing a device that bends the plate through the cooling process, it is intended to implement an efficient processing machine that can replace the conventional processing method by gasstoch.

본 발명의 구성은 유도전류를 발생시키는 전원장치부와 이에 연결된 장형 유도가열기이다. 본 발명인 장형유도가열기는 구성을 살펴보면 먼저 내부의 'ㄷ'자 형상의 코일(1)은 단면이 사각형인 중공(中空) 동관(銅管)으로서 전원장치부(11)에 연결되어 있고 이를 가열코일이라 한다. 가열코일(1)에는 전원장치부(11)에 연결되어 일정한 주파수의 교류전류가 흐르게 되어 가열코일(1)의 밑에 있는 가공판(13)에 유도 전류가 발생하여 열이 발생하게 된다. 이때 가열코일(1)의 유도전류를 가공판(13)에 집중적으로 가해지도록 하기위해 가열코일(1)의 윗면과 측면에 강자성체인 코아(4)를 둘러싼다. 또한 가열코일(1)에는 냉각펌프(12)에도 연결되어 유도가열시 가공판(13)에서 반사된 열이 이 가열코일(1)에 전달되어 온도가 올라가면 이를 식혀주는 역할을 한다.The configuration of the present invention is a power supply unit for generating an induced current and a long induction heater connected thereto. Looking at the configuration of the long induction heater of the present invention, first, the 'c'-shaped coil 1 inside is connected to the power supply unit 11 as a hollow copper tube having a rectangular cross section and heating it. It is called a coil. The heating coil 1 is connected to the power supply unit 11 so that an alternating current of a constant frequency flows, so that an induced current is generated in the processing plate 13 under the heating coil 1 to generate heat. At this time, in order to concentrate the induced current of the heating coil (1) to the processing plate 13, the core (4), which is a ferromagnetic material, is wrapped around the top and side surfaces of the heating coil (1). In addition, the heating coil (1) is also connected to the cooling pump (12) and serves to cool the heat reflected from the processing plate 13 is transferred to the heating coil (1) during induction heating when the temperature rises.

가열코일(1)의 양 측면에 두 개의의 직선 형상의 코일이 있는데 이것의 단면도 사각형인 중공(中空) 동관(銅管)이며 관의 외부에는 많은 구멍이 나 있다. 이것들을 냉각코일(2)이라 하는데 이는 별도의 냉각펌프(12)에 호스로 연결되어 있으며 가열코일(1)의 가열이 끝나면 이 냉각코일(2)에 냉각수를 흘려보내면 외부의 구멍을 통해 하면의 판에 물이 접촉되어 판을 급격히 냉각시켜 판에 굽힘 변형이 잘 일어나도록 해주는 역할을 한다.There are two straight coils on both sides of the heating coil 1, which are hollow copper tubes, which are rectangular in cross section, and have many holes on the outside of the tube. These are called cooling coils (2), which are connected to a separate cooling pump (12) by a hose. When the heating coil (1) is finished heating, when the cooling water flows into the cooling coil (2), Water is in contact with the plate, and the plate is cooled rapidly, so that bending deformation occurs well.

유도가열시 가열코일(1)과 가공판(13)의 간격이 작을수록 가공판(13)에 유도되는 2차 전류가 커지므로 굽힘 변형이 많이 일어나 가공성이 좋아지므로 판과의 간격이 작게 유지하도록 해야 한다. 그러나 간격을 너무 작게 하다 만약에 가열코일(1)과 가공판(13)이 접촉을 하면 가열코일(1)의 전류가 직접 가공판(13)에 흐르기 때문에 유도가열작업이 불가능하게 된다. 이러한 것을 막아주게 하기 위해 가열코일(1)의 하면에 일정 간격으로 비전도(전기가 흐르지 않는) 단열재를 붙여준다. 이를 간격유지기(3)라 하며 간격유지기(3)의 두께가 결국 가열코일(1)과 가열판(13) 사이의 간격이 된다.During induction heating, the smaller the gap between the heating coil 1 and the working plate 13, the larger the secondary current induced in the working plate 13, so that bending deformation occurs more and more, so that the workability is improved. Should be. However, the spacing is made too small. If the heating coil 1 and the processing plate 13 are in contact with each other, the induction heating operation is impossible because the current of the heating coil 1 flows directly to the processing plate 13. In order to prevent this, a non-conductive (no electricity) insulation material is attached to the lower surface of the heating coil 1 at regular intervals. This is called the gap holder 3 and the thickness of the gap holder 3 becomes the gap between the heating coil 1 and the heating plate 13.

장형유도가열기는 강판의 굽힘 가공에 있어 기존의 가스토오치에 의한 선상 가열법과는 작업효율 면에서 비교도 되지 않을 만큼 우수할 뿐만 아니라 원형코일을 사용한 유도가열 방법에 비해서도 월등한 작업효율을 보인다. 특히 기존의 두 가지 방법은 모두 가열할 궤적을 일정한 속도로 사람이나 기타 장치에 의해 이동을 해야 하므로 작업성이 매우 느리다. 반면에 본 장형유도 가열기는 판의 궤적 전체를 한 번에 순간적 가열이 가능하므로 작업 시간 면에서 기존의 두 가지 방법에 비해 비교도 되지 않을 만큼 빠르다.The long induction heater is not only superior in terms of work efficiency to the conventional heating method by gas stove, but also superior to the induction heating method using a circular coil. . In particular, both conventional methods have very slow workability because the trajectory to be heated must be moved by a person or other device at a constant speed. On the other hand, this type of induction heater allows instant heating of the entire plate trajectory at once, which makes it incomparably faster than conventional methods in terms of working time.

그리고 가공할 판이 평판이 아닌 곡판인 경우에도 일자 형태인 장형코일로 가열시 가열코일의 전자기력에 의해 곡판과 같은 곡으로 변형되어 가열이 가능하다And even when the plate to be processed is not a flat plate, it is possible to heat it by transforming it into a curved piece like a curved plate by the electromagnetic force of the heating coil when heating it with a long coil having a straight shape.

또한 기존의 가스토오치를 이용한 곡가공 방법이 작업자의 작업환경의 열악성과 가스라는 화학 에너지가 정확한 가열 입력인자로서 데이터베이스화나 자동화에 난점인데 반해 유도가열에서 사용하는 전기에너지는 청정에너지로서 작업 시 소음이 전혀 발생하지 않으며, 정확한 입열량을 알기가 쉽고 또 이를 제어하기가 용이하며, 무엇보다도 에너지를 집중시켜 가공효율이 가스토오치 사용 시보다 매우 높고 또한 가열조건의 데이터베이스화나 자동화에도 매우 유리하다.In addition, the conventional processing method using the gas stove is the poor input of worker's working environment and the chemical energy such as gas is the exact heating input factor, and it is difficult to make database or automation, whereas the electric energy used in induction heating is the clean energy. It does not occur at all, it is easy to know the exact heat input and easy to control, and above all, the energy efficiency is concentrated, the processing efficiency is much higher than when using the gas stove, and it is also very advantageous for the database or automation of heating conditions.

또한 향후에 전개될 CO2 총량규제에 적용받게 될 경우 가스토오치를 사용할 경우 CO2가스가 배출되므로 아예 가스토오치의 사용이 불가능하게 될 수도 있을 것이다.Also, if you apply you will receive the total amount of CO 2 regulations will be developed in the future when using a gas torch, because CO 2 gas emissions will even be possible to use a gas torch.

1. 가열코일 : 'ㄷ'형상의 중공 코일로 유도가열기의 전원공급부에 연결되어 교류전류가 흐르며 또한 별도의 냉각펌프와도 연결되어 내부에 냉각수가 흘러 유도가열시 가열코일의 하면에 위치하는 가공판의 열에 의해 온도가 올라가는 것을 식혀준다.1. Heating coil: 'C' shaped hollow coil connected to the power supply of the induction heater and flowing alternating current, and also connected to a separate cooling pump, so that the coolant flows inside and located on the bottom of the heating coil during induction heating. Cool the temperature rise by the heat of the plate.

2. 냉각코일 : 냉각코일의 양 쪽에 위치한 두 개의 일자형 코일로 별도의 냉각펌프와도 연결되어있으며 가열코일에 의한 발열 후 냉각수를 이곳에 흘려주면 이 냉각코일의 하면에 있는 여러 개의 구멍을 통해 냉각수가 가공판에 흘려져 판을 냉각시켜 판의 변형이 발 일어나도록 해준다.2. Cooling coil: Two straight coils located on both sides of the cooling coil, which are also connected to a separate cooling pump. If the cooling water flows after heating by the heating coil, the cooling water passes through several holes in the bottom of the cooling coil. Flows into the plate to cool the plate, causing deformation of the plate.

3. 간격유지기 : 유도가열시 가열코일과 가공판의 간격이 작을수록 가공판에 유도되는 2차 전류가 커지므로 굽힘 변형이 많이 일어나 가공성이 좋아지므로 판과의 간격이 작게 유지하도록 해야 한다. 그러나 간격을 너무 작아 가열코일과 가공판이 접촉을 하면 가열코일의 전류가 직접 가공판에 흐르기 때문에 유도가열작업이 불가능하게 된다. 이러한 것을 막아주게 하기 위해 가열코일의 하면에 일정 간격으로 비전도(전기가 흐르지 않는) 단열재를 붙여주는데 이를 간격유지기라 하며 간격유지기의 두께가 가열코일과 가열판 사이의 간격이 된다.3. Gap maintainer: Induction heating means that the smaller the gap between the heating coil and the processed plate, the larger the secondary current induced in the processed plate. However, when the gap is too small and the heating coil is in contact with the plate, the induction heating operation is impossible because the current of the heating coil flows directly to the plate. In order to prevent this, a non-conductive (non-electric) insulation is attached to the lower surface of the heating coil at a predetermined interval, which is called a gap holder, and the thickness of the gap holder is a gap between the heating coil and the heating plate.

4. 코아 : 유도가열 시 가열코일의 유도전류를 가공판에 집중적으로 가해지도록 하기 위해 가열코일의 윗면과 측면에 강자성체인 코아를 둘러싼다.4. Core: Enclose ferromagnetic core on the top and side of heating coil to induce heating current of heating coil to work plate during induction heating.

Claims (2)

도1과 같이 'ㄷ'자 형상의 중공(中空) 동관(銅管)으로 구성된 가열코일(1)과 이 코일의 윗면과 측면에 강자성체인 코아(4)와 가열코일의 양측면에 직선 형상의 중공(中空) 동관(銅管)으로 구성되며 외부에 많은 구멍을 갖고 있는 냉각코일(2) 및 가열 코일의 하면에 가열코일과 가공판의 간격을 일정하게 유지시켜주는 비전도체 단열재인 간격유지기(3)로 구성되어 가열코일에 전원부를 연결하여 일정한 주파수를 갖는 교류전류를 가열코일에 흘려주어 가열코일의 하면에 배치된 가공판에 열을 발생시킨 후 냉각코일을 통해 판에 냉각수를 흘려주므로써 가열된 판을 변형시키는 등의 열간작업을 할 수 있게 하는 장치As shown in Fig. 1, a heating coil 1 composed of a hollow copper tube having a 'C' shape, and a hollow core having a ferromagnetic material on the upper and side surfaces of the coil and a linear hollow on both sides of the heating coil. Gap retainer, which is composed of a copper tube and has a large number of holes in the outside, and a non-conductor insulating material that maintains a constant gap between the heating coil and the working plate on the lower surface of the heating coil. 3) by connecting the power supply to the heating coil to flow alternating current having a certain frequency to the heating coil to generate heat on the processed plate placed on the lower surface of the heating coil, and then to flow the cooling water to the plate through the cooling coil. Device that enables hot work, such as deforming heated plates 청구항 1에 있어서 가열코일(1), 코아(4), 냉각코일(2) 및 간격유지기(3)가 길이 방향으로 직선이거나 곡면 가공판을 위하여 도 3과 같이 가열코일의 길이 방향으로 일정한 곡인 R을 준 형상The heating coil 1, the core 4, the cooling coil 2 and the spacer 3 are straight in the longitudinal direction or are curved in the longitudinal direction of the heating coil as shown in FIG. Geometry R
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