KR101204497B1 - Magnesium alloy hot-rolling mill - Google Patents

Magnesium alloy hot-rolling mill Download PDF

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KR101204497B1
KR101204497B1 KR1020107010399A KR20107010399A KR101204497B1 KR 101204497 B1 KR101204497 B1 KR 101204497B1 KR 1020107010399 A KR1020107010399 A KR 1020107010399A KR 20107010399 A KR20107010399 A KR 20107010399A KR 101204497 B1 KR101204497 B1 KR 101204497B1
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magnesium alloy
rolling mill
heating
rolling
roll
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KR20100072350A (en
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노부히로 다조에
히사시 혼조
히데오 마츠무라
가츠히코 야나이
후미타카 야나이
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가부시키가이샤 아이에이치아이
아이에이치아이 메탈테크 가부시키가이샤
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/08—Lubricating, cooling or heating rolls internally
    • B21B2027/086—Lubricating, cooling or heating rolls internally heating internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

압연기(3)의 입,출측 양단에 마그네슘 합금 시트(S)를 각각 코일 상태로 가열, 보온 가능한 권취기(1, 2)를 설치하고, 마그네슘 합금 시트를 복수 리버스 압연에 의해 순차적으로 두께 감소시키는 마그네슘 합금 열간 압연 장치(100)에 있어서, 압연기(3)는 표면 온도를 어느 일정 온도로 가열, 승온 가능한 워크 롤(3a)과 백업 롤(3b)을 구비한다. 본 발명에 따르면, 마그네슘 합금의 열간 압연 중의 온도 변동에 따른 제품의 품질 저하를 방지, 수율 향상, 생산량 증대가 가능하다.Winding machines 1 and 2 capable of heating and keeping the magnesium alloy sheet S coiled in the coil state at both ends of the inlet and outlet sides of the rolling mill 3 are respectively provided to sequentially reduce the thickness of the magnesium alloy sheet by a plurality of reverse rolling. In the magnesium alloy hot rolling device 100, the rolling mill 3 includes a work roll 3a and a backup roll 3b capable of heating and heating the surface temperature to a certain temperature. According to the present invention, it is possible to prevent the deterioration of the product quality due to the temperature fluctuation during hot rolling of the magnesium alloy, to improve the yield, and to increase the yield.

Description

마그네슘 합금 열간 압연 장치{Magnesium alloy hot-rolling mill}Magnesium alloy hot-rolling mill

본 발명은 마그네슘 합금 열간 압연 장치에 관한 것이다.The present invention relates to a magnesium alloy hot rolling apparatus.

본원은 2007년 10월 16일에 일본 출원된 일본특허출원 제2007-269057호에 기초하여 우선권을 주장하고, 그 내용을 여기에 원용한다.This application claims priority based on Japanese Patent Application No. 2007-269057 for which it applied to Japan on October 16, 2007, and uses the content here.

마그네슘 합금 시트를 제조하기 위해서는, 예를 들면 직경 300~400mm, 길이 500~600mm정도의 환봉형상의 빌렛을 열간 압출에 의해, 예를 들면 두께 10mm이하의 후판으로 성형하고, 상기 후판을 소정 길이(예를 들면, 3m)로 절단하여 절단 판재로 하며, 상기 절단 판재를 조(粗)압연에 의해 두께 1mm정도까지 압연한다.In order to manufacture the magnesium alloy sheet, for example, a round rod-shaped billet having a diameter of 300 to 400 mm and a length of 500 to 600 mm is formed into a thick plate having a thickness of 10 mm or less by hot extrusion, and the thick plate is formed to a predetermined length ( For example, it cuts to 3m), and it is set as a cutting board material, and the said cutting board material is rolled to about 1 mm in thickness by rough rolling.

그리고, 상기 두께 1mm정도의 마그네슘 합금 코일을 마무리 압연에 의해 더 압연함으로써, 두께 0.2~0.5mm정도의 코일재나 두께 50μm이하(예를 들면, 30~40μm)의 코일을 제조한다.By further rolling the magnesium alloy coil having a thickness of about 1 mm by finish rolling, a coil member having a thickness of about 0.2 to 0.5 mm and a coil having a thickness of 50 μm or less (for example, 30 to 40 μm) are produced.

마그네슘 합금은 상온에서 압연하기 위해서는 대압력을 필요로 할 뿐만 아니라 갈라지기 쉽기 때문에, 열간에서 압연하는 것이 바람직하다.Magnesium alloys require a large pressure to be rolled at room temperature, and are easily cracked. Therefore, the magnesium alloy is preferably hot rolled.

마그네슘 합금을 열간 압연하는 장치의 종래예로서는, 특허문헌 1의 도 1이나 특허문헌 2의 도 1에 개시되어 있다.As a prior art example of the apparatus which hot-rolls a magnesium alloy, it is disclosed by FIG. 1 of patent document 1, and FIG. 1 of patent document 2. As shown in FIG.

이들 특허문헌에 개시된 열간 압연 장치는, 마그네슘 합금을 왕복 압연하는 압연기와, 상기 압연기의 상류측 및 하류측에 배치된 2개의 가열로를 구비하고, 상기 가열로에 의해 마그네슘 합금을 소정 온도로 가열하여 압연기로 압연하고 있다.The hot rolling apparatus disclosed in these patent documents includes a rolling mill for reciprocating a magnesium alloy, and two heating furnaces disposed upstream and downstream of the rolling mill, and heat the magnesium alloy to a predetermined temperature by the heating furnace. It is rolling with the rolling mill.

특허문헌 1: 일본 특허 제3521863호 공보Patent Document 1: Japanese Patent No. 3351863 특허문헌 2: 일본 특허 제3821074호 공보Patent Document 2: Japanese Patent No. 3821074

그러나, 상기 특허문헌 1 및 2에 개시된 열간 압연 장치에서는, 코일 선단부의 권취부 및 후단의 끝단부는 가열하여 안정적으로 압연할 수 없기 때문에, 제품 코일이 되지 않는다. 또, 수율이 저하되어 생산량을 크게 할 수 없는 등의 결점이 있다.However, in the hot rolling apparatus disclosed in the above Patent Documents 1 and 2, since the winding portion and the trailing end portion of the coil tip portion cannot be heated and rolled stably, they are not product coils. Moreover, there exists a fault that a yield falls and production quantity cannot be made large.

본 발명은 상술한 사정을 감안하여 이루어진 것으로, 마그네슘 합금의 열간 압연 중의 온도 변동에 따른 제품의 품질 저하를 방지, 수율의 향상, 생산량의 증대가 가능한 마그네슘 합금 열간 압연 장치를 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a magnesium alloy hot rolling apparatus capable of preventing product quality deterioration due to temperature fluctuations during hot rolling of magnesium alloys, improving yields, and increasing production. .

상기 과제를 해결하기 위해, 본 발명에서는 이하의 장치를 채용하였다.In order to solve the said subject, the following apparatus was employ | adopted in this invention.

본원에 관한 제1 발명으로서, 압연기의 입,출측 양단에 마그네슘 합금 시트를 각각 코일 상태로 가열, 보온 가능한 권취기를 설치하고, 마그네슘 합금 시트를 복수 리버스 압연에 의해 순차적으로 두께 감소시키는 마그네슘 합금 열간 압연 장치에 있어서, 압연기는 표면 온도를 어느 일정 온도로 가열, 승온 가능한 워크 롤(work roll)과 백업 롤을 구비한다.As a 1st invention which concerns on this application, the magnesium alloy hot rolling which installs the winding machine which can heat and insulate a magnesium alloy sheet in the coil state at the both ends of the rolling mill's entrance and exit, respectively, and reduces thickness sequentially by a plurality of reverse rolling of a magnesium alloy sheet. In the apparatus, the rolling mill has a work roll and a backup roll capable of heating and heating the surface temperature to a certain temperature.

본원에 관한 제2 발명으로서, 상기 제1 발명에 관한 마그네슘 합금 열간 압연 장치에 있어서, 압연기는 가열, 승온 가능한 소직경 롤도 설치 가능한 단수(段數) 절환 압연기이어도 된다.As a 2nd invention which concerns on this application, in the magnesium alloy hot rolling apparatus which concerns on said 1st invention, the rolling mill may be a single-stage switching rolling mill which can also install the small diameter roll which can be heated and heated up.

본원에 관한 제3 발명으로서, 상기 제1 발명에 관한 마그네슘 합금 열간 압연 장치에 있어서, 압연기와 한 쌍의 권취기 각각의 사이에 복수 쌍의 가열, 승온 가능한 상하 롤을 갖춘 핀치 롤을 배치하여, 마그네슘 합금 코일의 안정된 반송을 하며, 핀치 롤 사이에 장력 조절 장치를 설치해도 된다.As a 3rd invention which concerns on this application, in the magnesium alloy hot rolling apparatus which concerns on the said 1st invention, the pinch roll provided with a plurality of pairs of the upper and lower rolls which can be heated and heated up is arrange | positioned between a rolling mill and a pair of winder, A stable conveyance of a magnesium alloy coil may be performed, and a tension adjusting device may be provided between pinch rolls.

본 발명에 따르면, 압연기의 워크 롤 및 백업 롤이 마그네슘 합금 시트를 가열, 승온 가능하게 구성되어 있으므로, 마그네슘 합금 시트의 열간 압연 중의 온도 변동에 따른 제품의 품질 저하를 방지할 수 있다. 또, 수율이 향상하고 생산력 증대가 가능하게 되어 시트재 또는 박재(箔材)의 품질을 양호하게 유지할 수 있다.According to the present invention, since the work roll and the backup roll of the rolling mill are configured to heat and heat the magnesium alloy sheet, it is possible to prevent the deterioration of the product quality due to the temperature fluctuation during hot rolling of the magnesium alloy sheet. Moreover, the yield can be improved and productivity can be increased, and the quality of a sheet | seat material or a thin material can be kept favorable.

도 1은 본 발명의 일실시형태에서의 열간 압연 장치의 개략 구성을 도시하는 모식도이다.
도 2는 상기 실시형태에서의 보가열 권취기의 개략 구성을 도시하는 모식도이다.
도 3a는 상기 실시형태에서의 압연기의 설정 변경을 도시하는 도면이다.
도 3b는 상기 실시형태에서의 압연기의 설정 변경을 도시하는 도면이다.
도 4a는 상기 실시형태에서의 압연기의 다른 단수의 예를 도시하는 도면이다.
도 4b는 상기 실시형태에서의 압연기의 다른 단수의 예를 도시하는 도면이다.
도 5는 상기 실시형태에서의 장력 조절 장치의 개략 구성을 도시하는 도면이다.BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows schematic structure of the hot rolling apparatus in one Embodiment of this invention.
It is a schematic diagram which shows schematic structure of the beam heating winder in the said embodiment.
It is a figure which shows the setting change of the rolling mill in the said embodiment.
It is a figure which shows the setting change of the rolling mill in the said embodiment.
It is a figure which shows the example of the other stage of the rolling mill in the said embodiment.
It is a figure which shows the example of the other stage of the rolling mill in the said embodiment.
It is a figure which shows schematic structure of the tension control apparatus in the said embodiment.

이하, 본 발명의 일실시형태에 대해서 도면을 참조하여 설명한다.Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

도 1은 본 실시형태에서의 열간 압연 장치(100)의 구성을 도시하는 정면도이다.FIG. 1: is a front view which shows the structure of the hot rolling apparatus 100 in this embodiment.

도 1에 도시된 바와 같이, 본 실시형태에 관한 열간 압연 장치(100)(마그네슘 합금 열간 압연 장치)는 제1 보가열(保加熱) 권취기(1)(권취기), 제2 보가열 권취기(2)(권취기), 압연기(3), 복수의 한 쌍의 핀치 롤(4) 및 장력 조절 장치(5)를 구비하고 있다.As shown in FIG. 1, the hot rolling apparatus 100 (magnesium alloy hot rolling apparatus) which concerns on this embodiment is the 1st preheating winding machine 1 (winding machine), and the 2nd preheating winding. A blower 2 (winder), a rolling mill 3, a plurality of pairs of pinch rolls 4, and a tension adjusting device 5 are provided.

도 2는 제1 보가열 권취기(1) 및 제2 보가열 권취기(2)의 개략 구성을 도시하는 모식도이다.FIG. 2: is a schematic diagram which shows schematic structure of the 1st beam heating winder 1 and the 2nd beam heating winder 2. As shown in FIG.

상기 두 보가열 권취기(1, 2)는, 권취부(1a, 2a)와 보가열로(1b, 2b)를 구비한다. 보가열로(1b, 2b)는 히터(H)를 내장하고 있다.The two beam heating winders 1 and 2 include winding portions 1a and 2a and beam heating furnaces 1b and 2b. The furnace heating furnaces 1b and 2b have a heater H built therein.

이러한 보가열 권취기(1, 2)는, 압연기(3)의 입,출측 양단에 설치됨과 동시에 마그네슘 합금 시트를 각각 코일 상태로 가열, 보온이 가능하고, 권취부(1a, 2a)에 의해 마그네슘 합금 시트(S)의 길이방향에서의 양단부를 코일형상으로 감기/되감기 가능하게 권회함과 동시에, 히터(H)에 의해 보가열로(1b, 2b) 내를 소정 온도(제1 온도)로 가열, 보온함으로써, 코일형상으로 권취한 마그네슘 합금 시트(S)(마그네슘 합금 코일)를 소정 온도로 유지한다.The heating heaters 1 and 2 are installed at both ends of the inlet and outlet sides of the rolling mill 3, and the magnesium alloy sheet can be heated and insulated in a coil state, respectively, and the magnesium is wound by the winding units 1a and 2a. Both ends in the longitudinal direction of the alloy sheet S are wound so as to be wound and rewound in a coil shape, and the inside of the heating furnaces 1b and 2b is heated to a predetermined temperature (first temperature) by the heater H. , The magnesium alloy sheet S (magnesium alloy coil) wound in a coil shape is kept at a predetermined temperature by keeping warm.

상기 제1 온도는, 예를 들면 100~350℃정도이며, 200~250℃가 적합하다.The said 1st temperature is about 100-350 degreeC, for example, and 200-250 degreeC is suitable.

도 1로 되돌아가서 설명을 계속한다.Returning to Fig. 1, the explanation will continue.

압연기(3)(압연기, 단수 절환 압연기)는 상기 한 쌍의 보가열 권취기(1, 2)의 사이에 배치되어 있고, 병행하여 대향하는 가열?승온 가능한 한 쌍의 워크 롤(3a), 상기 워크 롤(3a) 각각에 병행하여 대향하는 가열?승온 가능한 한 쌍의 백업 롤(3b), 이들 2쌍의 롤(3a, 3b)을 회전 가능하게 지지하여 수납하는 하우징(3c), 이들 2쌍의 롤(3a, 3b)을 회전 구동시키는 구동원(도시생략)을 갖고 있다.The rolling mill 3 (rolling mill, single-stage change rolling mill) is arrange | positioned between the said pair of heat-heating winding machines 1 and 2, and the pair of work rolls 3a which can heat and heat up in parallel, and the said A pair of back-up rolls 3b capable of heating and raising temperature in parallel to each of the work rolls 3a, a housing 3c for rotatably supporting and storing these two pairs of rolls 3a and 3b, these two pairs It has a drive source (not shown) which rotationally drives the rolls 3a and 3b.

워크 롤(3a) 및 백업 롤(3b)은 표면 온도를 일정 온도(제2 온도)로 가열?승온 가능한 가열 롤로서, 워크 롤(3a) 사이를 통과하는 마그네슘 합금 시트(S)를 일방향으로 송출하면서 마그네슘 합금 시트(S)를 가열, 승온시키면서 가압한다. 워크 롤(3a) 및 백업 롤(3b)은, 예를 들면 표면으로부터 소정 깊이의 위치에 봉형상의 카트리지 히터가 소정 간격으로 축선 방향으로 복수개 매립된 구조를 가진다.The work roll 3a and the backup roll 3b are heating rolls capable of heating and heating the surface temperature to a constant temperature (second temperature), and feeding the magnesium alloy sheet S passing through the work rolls 3a in one direction. While pressing the magnesium alloy sheet (S) while heating and raising the temperature. The work roll 3a and the backup roll 3b have a structure in which a plurality of rod-shaped cartridge heaters are embedded in the axial direction at predetermined intervals, for example, at positions of a predetermined depth from the surface.

상기 제2 온도는, 예를 들면 150℃이상 350℃이하 정도이다.The said 2nd temperature is about 150 degreeC or more and 350 degrees C or less, for example.

이에 의해, 압연기(3)는 마그네슘 합금 시트(S)를 안정되게 두께 감소시키면서 장척(長尺)화시킨다.As a result, the rolling mill 3 lengthens the magnesium alloy sheet S while reducing the thickness thereof stably.

또한, 압연기(3)는 마그네슘 합금 시트(S)의 반송방향을 소정의 타이밍에서 반전시켜 왕복 압연을 행한다. 이에 의해, 압연기(3)는 마그네슘 합금 시트(S)를, 예를 들면 두께 1mm정도에서 두께 0.2~0.5mm정도 또는 50μm이하(예를 들면, 30~40μm)까지 두께 감소시키고 장척화시킨다.Moreover, the rolling mill 3 performs reciprocal rolling by inverting the conveyance direction of the magnesium alloy sheet S at a predetermined timing. As a result, the rolling mill 3 reduces and lengthens the magnesium alloy sheet S from about 1 mm in thickness to about 0.2 to 0.5 mm in thickness or 50 μm or less (for example, 30 to 40 μm).

여기서, 본 실시형태의 압연기(3)는 소직경 워크 롤도 설치 가능한 단수 절환 압연기이다. 도 3a는 4단 구성으로 설정한 경우(도 1에 도시된 것)의 압연기(3)를 도시하고, 도 3b는 10단압 구성으로 설정한 경우의 압연기(3)를 도시하고 있다. 이러한 압연기(3)는 통상적으로는, 도 3a에 도시된 4단 구성으로 설정되지만, 얇은 재료의 경우, 예를 들면 50μm 박재 압연의 경우는, 도 3b에 도시된 바와 같이 도중 패스로부터 한 쌍의 소직경 워크 롤(3d)과 상하 2쌍의 수평 서포트 롤(3e)을 구비한 10단압 구성으로 설정 변경된다.Here, the rolling mill 3 of this embodiment is a single-stage change rolling mill which can also install a small diameter work roll. FIG. 3A shows the rolling mill 3 in the case of being set in a four-stage configuration (shown in FIG. 1), and FIG. 3B shows the rolling mill 3 in the case of being set in a ten-stage pressure configuration. Such a rolling mill 3 is usually set in a four-stage configuration shown in FIG. 3A, but in the case of thin materials, for example 50 μm thin material rolling, as shown in FIG. The setting is changed to the 10-stage pressure configuration including the small-diameter work roll 3d and the two upper and lower horizontal support rolls 3e.

도 4는 이러한 압연기(3)의 다른 구성예를 도시하는 것으로, 도 4a는 6단 구성의 압연기(31)를 도시하고, 도 4b는 10단 구성의 압연기(32)를 도시하고 있다.FIG. 4 shows another configuration example of such a rolling mill 3, FIG. 4A shows a rolling mill 31 having a six-stage configuration, and FIG. 4B shows a rolling mill 32 having a ten-stage configuration.

압연기(31)는 한 쌍의 워크 롤(3a)과 2쌍의 백업 롤(3b)을 갖는 것이고, 압연기(32)는 한 쌍의 워크 롤(3a)과 4쌍의 백업 롤(3b)을 갖는 것이다.The rolling mill 31 has a pair of work rolls 3a and two pairs of backup rolls 3b, and the rolling mill 32 has a pair of work rolls 3a and four pairs of backup rolls 3b. will be.

여기서, 압연기(32)의 4쌍의 백업 롤(3b) 중에서 내측의 2쌍(워크 롤(3a)에 접해 있는 것)은 중간 롤이라고도 부른다.Here, among the four pairs of backup rolls 3b of the rolling mill 32, the two inner pairs (the ones in contact with the work roll 3a) are also called intermediate rolls.

도 1로 되돌아가서 설명을 계속한다.Returning to Fig. 1, the explanation will continue.

핀치 롤(4)은, 상기 워크 롤(3a) 및 백업 롤(3b)과 마찬가지로, 표면으로부터 소정 깊이의 위치에 봉형상의 카트리지 히터가 소정 간격으로 축선 방향으로 복수개 매립된 구조를 가지고, 표면 온도가 적당한 온도(예를 들면, 150℃이상 350℃이하)으로 승온된 가열 롤로서, 압연기(3)에 의한 왕복 압연에 따라 좌, 우 주행하는 마그네슘 합금 시트(S)를 보조 반송하는 것이다. 이러한 핀치 롤(4)은 압연기(3)와 제1 보가열 권취기(1)의 사이 및 압연기(3)와 제2 보가열 권취기(2)의 사이에 각각 복수 세트 배치되어 있다.Similar to the work roll 3a and the backup roll 3b, the pinch roll 4 has a structure in which a plurality of rod-shaped cartridge heaters are embedded in the axial direction at predetermined intervals at a predetermined depth from the surface, and the surface temperature is increased. As a heating roll heated up at a suitable temperature (for example, 150 degreeC or more and 350 degrees C or less), it carries out the auxiliary conveyance of the magnesium alloy sheet S which runs left and right according to the reciprocation rolling by the rolling mill 3. As shown in FIG. These pinch rolls 4 are respectively arranged in multiple numbers between the rolling mill 3 and the 1st heat-heating winding machine 1, and between the rolling mill 3 and the 2nd heat-heating winding machine 2, respectively.

이들 핀치 롤(4)은, 반송 속도의 조절에 의해 압연기(3)에서 압연되는 마그네슘 합금 시트(S)에 적절한 장력을 부여한다.These pinch rolls 4 give a suitable tension to the magnesium alloy sheet S rolled by the rolling mill 3 by adjustment of a conveyance speed.

장력 조절 장치(5)는, 인접하는 2쌍의 핀치 롤(4) 사이에 위치하도록 배치되고, 도 5에 도시된 바와 같이 2개의 고정 롤(5a)과 하나의 댄서 롤(5b)을 구비하고 있다. 마그네슘 합금 시트(S)는, 댄서 롤(5b)이 2개의 고정 롤(5a) 사이에 마그네슘 합금 시트(S)에 의해 매달리도록 감아 돌려지고, 별도 설치된 장력계(도시생략)의 계측값이 일정해지도록 댄서 롤(5b)의 상하이동에 의해 장력이 제어된다.The tension adjusting device 5 is arranged to be positioned between two adjacent pairs of pinch rolls 4, and has two fixing rolls 5a and one dancer roll 5b as shown in FIG. have. The magnesium alloy sheet S is wound so that the dancer roll 5b is suspended by the magnesium alloy sheet S between two fixed rolls 5a, and the measured value of the tension meter (not shown) separately provided is constant. The tension is controlled by the shanghaidong of the dancer roll 5b so that it may be released.

이러한 구성에 있어서, 열간 압연 장치(100)는 마그네슘 합금 시트(S)의 마무리 압연을 행한다. 이하, 열간 압연 장치(100)의 동작에 대해서 설명한다.In such a configuration, the hot rolling apparatus 100 performs finish rolling of the magnesium alloy sheet S. FIG. Hereinafter, the operation of the hot rolling apparatus 100 will be described.

마그네슘 합금 시트(S)는, 제1 보가열 권취기(1)로부터 되감기면서(풀리면서) 제2 보가열 권취기(2)에 감기거나 또는 반대로 제2 보가열 권취기(2)로부터 되감기면서 제1 보가열 권취기(1)에 감김으로써, 일방향으로 반송되면서 압연기(3)에 의해 압연된다.The magnesium alloy sheet S is wound on the second boiling coil 2 while being rewound (unwinded) from the first boiling coil 1 or vice versa while rewinding from the second boiling coil 2 It is rolled by the rolling mill 3, while conveying to the 1st direction by winding up by the 1st heat-heating winding machine 1. As shown in FIG.

마그네슘 합금 시트(S)의 온도는 제1 보가열 권취기(1)부터 제2 보가열 권취기(2)까지의 사이에 약간 강하하지만, 워크 롤(3a), 백업 롤(3b) 및 핀치 롤(4)이 가열 롤이므로, 이들 롤과의 접촉에 의한 재료의 온도 저하, 온도 변동은 적다.Although the temperature of the magnesium alloy sheet S falls slightly between the first heating coil taker 1 and the second heating coil taker 2, the work roll 3a, the backup roll 3b, and the pinch roll Since (4) is a heating roll, the temperature fall of the material by contact with these rolls, and the temperature fluctuation are small.

열간 압연 장치(100)는, 제1 보가열 권취기(1)(또는 제2 보가열 권취기(2))가 마그네슘 합금 시트(S)의 되감기를 마치면 압연 방향을 반전한다. 열간 압연 장치(100)는, 이를 반복하여 마그네슘 합금 시트(S)를 왕복 압연하고, 마그네슘 합금 시트(S)를 순차적으로 두께 감소시켜 두께 0.2~0.5mm정도의 시트재 또는 50μm이하(예를 들면, 30~40μm)의 박재를 제조한다.The hot rolling apparatus 100 reverses a rolling direction when the 1st preheating winding machine 1 (or the 2nd preheating winding machine 2) finishes rewinding the magnesium alloy sheet S. As shown in FIG. The hot rolling apparatus 100 repeats this and reciprocally rolls the magnesium alloy sheet S, and sequentially decreases the magnesium alloy sheet S to have a thickness of about 0.2 to 0.5 mm, or a sheet member having a thickness of about 50 μm or less (for example, , 30-40 μm) to prepare a thin material.

여기서, 하기의 표 1에 본 열간 압연 장치(100)에 의한 마무리 압연의 패스 스케줄의 구체예를 나타낸다.Here, the specific example of the pass schedule of finish rolling by this hot rolling apparatus 100 is shown in following Table 1.

패스 No.Pass No. 입측 두께
(mm)Entrance thickness
(mm) 두께감소량
(mm)Thickness reduction
(mm) 압연온도
(℃)Rolling temperature
(℃) 워크 롤 직경
(mm)Work roll diameter
(mm) 압연속도
(m/분)Rolling speed
(m / min) 압연하중
(ton)Rolling load
(ton) 1One 1.001.00 0.300.30 200200 165165 3030 6060 22 0.700.70 0.210.21 200200 165165 3030 5858 33 0.490.49 0.150.15 200200 165165 3030 5555 44 0.340.34 0.100.10 200200 165165 3030 5252 55 0.240.24 0.070.07 200200 165165 3030 5050 66 0.170.17 0.050.05 150150 6060 3030 3030 77 0.120.12 0.040.04 150150 6060 3030 2929 88 0.080.08 0.020.02 150150 6060 3030 2828 99 0.060.06 0.020.02 150150 6060 3030 2727

최종 두께 0.04mm           Final thickness 0.04mm

상기 패스 스케줄에 있어서, 마그네슘 합금 시트(S)는 재질이 AZ31B, 치수가 두께 1.00mm, 폭 300mm인 코일재이다. 압연기(3)는 4단이고, 워크 롤 쌍(3a)의 각 롤의 직경은 165mm, 배럴 길이는 500mm이고, 백업 롤(3b)의 각 롤의 직경은 300mm이며, 핀치 롤(4)의 각 롤의 직경은 150mm이다.In the pass schedule, the magnesium alloy sheet S is a coil material having a material of AZ31B, a dimension of 1.00 mm in thickness, and a width of 300 mm. The rolling mill 3 has four stages, the diameter of each roll of the work roll pair 3a is 165 mm, the barrel length is 500 mm, the diameter of each roll of the backup roll 3b is 300 mm, and the angle of the pinch roll 4 The diameter of the roll is 150 mm.

또한, 상기 예에서는, 두 보가열 권취기(1, 2)에서의 가열?보온 온도는 250℃, 워크 롤(3a), 백업 롤(3b) 및 핀치 롤(4)은 히터 내장의 가열 롤이고, 표면 온도가 200℃로 되어 있다.In addition, in the said example, the heating and heat-retaining temperature in the two heating heaters 1 and 2 are 250 degreeC, the work roll 3a, the backup roll 3b, and the pinch roll 4 are the heating rolls with a heater. The surface temperature is 200 ° C.

그리고, 압연 속도는 30m/분으로 일정하게 하여 9패스(4왕복 반)의 왕복 압연을 행하고, 최종 두께 0.04mm의 박재로 하고 있다. 또한, 6패스째에 10단 소직경(워크 롤 직경:φ60mm) 밀로 교환하고, 이후 최종단 패스(9패스째)까지 사용하였다.And the rolling speed | rate is made constant at 30 m / min, 9-pass (4 reciprocating half) reciprocation rolling is carried out, and it is set as the foil of 0.04 mm of final thickness. In addition, the sixth pass was replaced with a ten-stage small diameter (work roll diameter: φ 60 mm) mill, and then used until the final end pass (the ninth pass).

압연 중의 마그네슘 합금 시트(S)는 고온이기 때문에 유연하여 압연기(3) 이외의 부위에서도 고압이 걸리면 눌린 흔적이 남을 우려가 있는데, 본 발명의 열간 압연 장치(100)에서는, 마그네슘 합금 시트(S)를 복수 세트의 핀치 롤(4)에 의해 복수 개소에서 끼워잡음으로써 각 핀치 롤(4)이 끼워잡는 힘을 작게 분산하여 핀치 롤(4)에 의한 눌린 흔적을 남길 우려를 없앤다.Since the magnesium alloy sheet S during rolling is high temperature, it may be flexible, and if there is a high pressure applied to a portion other than the rolling mill 3, there may be a crushed mark. However, in the hot rolling apparatus 100 of the present invention, the magnesium alloy sheet S may be Is pinched by a plurality of sets of pinch rolls 4 at a plurality of positions, so that the force of the pinch rolls 4 is dispersed to be small, thereby eliminating the risk of leaving the pressed traces by the pinch rolls 4.

또한, 본 열간 압연 장치(100)에서는, 장력 조절 장치(5)에 의해, 핀치 롤(4)부터 다음의 핀치 롤(4)까지의 마그네슘 합금 시트(S)의 장력을 일정하게 한다. 이에 의해, 마그네슘 합금 시트(S)의 비틀림이나 주름을 방지하고, 안정된 압연이 확보된다.In addition, in this hot rolling apparatus 100, the tension adjustment apparatus 5 makes the tension | tensile_strength of the magnesium alloy sheet S from the pinch roll 4 to the next pinch roll 4 constant. This prevents twisting and wrinkles of the magnesium alloy sheet S and ensures stable rolling.

이러한 열간 압연 장치(100)에 따르면, 마그네슘 합금 시트(S)의 대략 전체길이에 걸쳐 가열?보온하면서 압연하므로, 마그네슘 합금 시트(S)의 온도 강하를 억제하고, 열간 압연 중의 온도 변동에 따른 제품의 품질 저하를 방지할 수 있다. 따라서, 수율의 향상, 생산량의 증대가 가능하며, 완성품, 즉 시트재나 박재의 품질을 양호하게 유지할 수 있다.According to such a hot rolling apparatus 100, rolling is carried out while heating and keeping warm over the entire length of the magnesium alloy sheet (S), thereby suppressing the temperature drop of the magnesium alloy sheet (S), the product according to the temperature fluctuation during the hot rolling It is possible to prevent the deterioration of the quality. Therefore, the yield can be improved and the yield can be increased, and the finished product, that is, the quality of the sheet member or the foil member can be maintained satisfactorily.

본 실시형태에서는 4단, 6단 및 10단의 압연기를 예시하였지만, 실시에 있어서는 이에 한정되지 않는다.Although the rolling mill of 4 stage, 6 stage, and 10 stage was illustrated in this embodiment, it is not limited to this in implementation.

본 발명의 마그네슘 합금 열간 압연 장치는, 압연기의 워크 롤 및 백업 롤이 마그네슘 합금 시트를 가열, 승온 가능하게 구성되어 있으므로, 마그네슘 합금 시트의 열간 압연 중의 온도 변동에 의한 제품의 품질 저하를 방지할 수 있다. 또, 수율의 향상, 생산력 증대가 가능하게 되어 시트재 또는 박재의 품질을 양호하게 유지할 수 있다.In the magnesium alloy hot rolling apparatus of the present invention, since the work roll and the backup roll of the rolling mill are configured to heat and heat the magnesium alloy sheet, it is possible to prevent deterioration of product quality due to temperature fluctuation during hot rolling of the magnesium alloy sheet. have. In addition, the yield can be improved and the productivity can be increased, so that the quality of the sheet or foil can be maintained satisfactorily.

100 열간 압연 장치(마그네슘 합금 열간 압연 장치)
1 제1 보가열 권취기(권취기)
2 제2 보가열 권취기(권취기)
1a, 2a 권취부
1b, 2b 보가열로
3 압연기(단수 절환 압연기)
3a 워크 롤
3b 백업 롤
4 핀치 롤
5 장력 조절 장치
S 마그네슘 합금 시트100 hot rolling equipment (magnesium alloy hot rolling equipment)
1 first heating coil (winding machine)
2 second heating heating winder (winder)
1a, 2a winding
1b, 2b furnace
3 rolling mill (single change rolling mill)
3a work roll
3b backup roll
4 pinch rolls
5 tension control device
S magnesium alloy sheet

Claims (5)

압연기의 입,출측 양단에 마그네슘 합금 시트를 각각 코일 상태로 100℃~350℃로 가열, 보온 가능한 권취기를 설치하고, 상기 마그네슘 합금 시트를 복수 리버스 압연에 의해 순차적으로 두께 감소시키는 마그네슘 합금 열간 압연 장치에 있어서,
상기 압연기는 표면 온도를 150℃~350℃로 가열, 승온 가능한 워크 롤과, 표면 온도를 150℃~350℃로 가열, 승온 가능한 백업 롤을 구비하며,
상기 압연기와 상기 한 쌍의 권취기 각각의 사이에, 150℃~350℃로 가열, 승온 가능한 상하 롤을 갖춘 복수의 핀치 롤을 배치하는 마그네슘 합금 열간 압연 장치.Magnesium alloy hot rolling device for installing and winding a magnesium alloy sheet at 100 ° C. to 350 ° C. in a coil state at both ends of the inlet and outlet sides of the rolling mill, and sequentially reducing the thickness of the magnesium alloy sheet by plural reverse rolling. To
The rolling mill is provided with a work roll capable of heating and heating the surface temperature at 150 ° C to 350 ° C, and a backing roll capable of heating and heating the surface temperature at 150 ° C to 350 ° C,
The magnesium alloy hot rolling apparatus which arrange | positions the some pinch roll provided with the upper and lower roll which can be heated and heated up at 150 degreeC-350 degreeC between each said rolling mill and the said pair of winding machines. 제1항에 있어서,
상기 압연기는 가열, 승온 가능한 소직경 롤도 설치 가능한 단수 절환 압연기인 마그네슘 합금 열간 압연 장치.The method of claim 1,
The said rolling mill is a magnesium alloy hot rolling apparatus which is a single-stage switching rolling mill which can also install the small diameter roll which can be heated and heated up. 제1항 또는 제2항에 있어서,
상기 핀치 롤은, 상기 마그네슘 합금 시트의 안정된 반송을 하며, 상기 핀치 롤 사이에 장력 조절 장치를 설치하는 마그네슘 합금 열간 압연 장치.The method according to claim 1 or 2,
The said pinch roll is a magnesium alloy hot rolling apparatus which makes stable conveyance of the said magnesium alloy sheet, and provides a tension control apparatus between the said pinch rolls. 제1항 또는 제2항에 있어서,
상기 핀치 롤의 표면으로부터 소정 깊이의 위치에 카트리지 히터가 매립되어 있는 마그네슘 합금 열간 압연 장치.The method according to claim 1 or 2,
The magnesium alloy hot rolling apparatus in which the cartridge heater is embedded in the position of the predetermined depth from the surface of the said pinch roll. 제3항에 있어서,
상기 핀치 롤의 표면으로부터 소정 깊이의 위치에 카트리지 히터가 매립되어 있는 마그네슘 합금 열간 압연 장치.The method of claim 3,
The magnesium alloy hot rolling apparatus in which the cartridge heater is embedded in the position of the predetermined depth from the surface of the said pinch roll.
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