KR20040019731A - Apparatus and method of correcting the pass line of strip at the level of air knife - Google Patents

Apparatus and method of correcting the pass line of strip at the level of air knife Download PDF

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Publication number
KR20040019731A
KR20040019731A KR1020020051441A KR20020051441A KR20040019731A KR 20040019731 A KR20040019731 A KR 20040019731A KR 1020020051441 A KR1020020051441 A KR 1020020051441A KR 20020051441 A KR20020051441 A KR 20020051441A KR 20040019731 A KR20040019731 A KR 20040019731A
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KR
South Korea
Prior art keywords
roll
pass line
strip
air knife
deformation
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KR1020020051441A
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Korean (ko)
Inventor
김근영
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재단법인 포항산업과학연구원
주식회사 포스코
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Priority to KR1020020051441A priority Critical patent/KR20040019731A/en
Publication of KR20040019731A publication Critical patent/KR20040019731A/en

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Abstract

PURPOSE: An apparatus and a method for controlling pass line and curvature deformation of transferring strip in the upper part of hot dip coating pot are provided to correct curvature formed on strip and separation of pass line and reduce plating deviation accordingly by movably controlling correction roll and deformation preventing roll in the pot of hot dip coating facility. CONSTITUTION: The apparatus comprises a driving motor(10) installed adjacently to a lower side of an air knife(6) of a pass line (P) through which a hot dip galvanized strip(1) passes; a screw shaft(12) fixed to rotation shaft of the driving motor; a guide block(14) movably engaged with the screw shaft along the screw shaft; and correction roll(4) and deformation preventing roll(5) arranged with being fixed to the guide block so that the correction roll and deformation preventing roll are moved side to side. The method comprises first process of measuring a separation amount between strip(1) and normal pass line (P) through a gap sensor(7) installed at an upper side of an air knife(6); second process of moving correction roll(4) and deformation preventing roll(5) side to side as rotating driving motor(10) in forward and reverse directions according to the separation amount; and third process of stopping driving of the driving motor at that position after correcting the strip up to a set limit repetition in which curvature is converged into a zero point as repeating the second process several times.

Description

용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정장치 및 그 방법{APPARATUS AND METHOD OF CORRECTING THE PASS LINE OF STRIP AT THE LEVEL OF AIR KNIFE}Pass line and semi-curvature regulating device and its method in the upper part of hot dip plating port and its method {APPARATUS AND METHOD OF CORRECTING THE PASS LINE OF STRIP AT THE LEVEL OF AIR KNIFE}

본 발명은 갭센서를 이용하여 용융도금설비의 아연포트에서 싱크롤의 굽힘에 의해 발생되는 강판의 반곡변형 및 패스라인 이탈정도를 측정하고 변형방지롤과 교정롤을 유동시켜 이를 교정할 수 있도록 한 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정장치 및 그 방법에 관한 것이다.The present invention is to measure the degree of bending and pass line deviation of the steel sheet caused by the bending of the sink roll in the zinc port of the hot-dip galvanizing equipment by using a gap sensor and to correct the flow by preventing the deformation roll and the correction roll flow An apparatus and a method for adjusting a pass line and a semi-curvature of a transfer steel sheet at an upper part of a hot dip plating port.

연속용융도금설비는 냉연/표면처리설비의 하나로서 강판의 표면에 아연용융액을 도포시키는 설비로서, 도 1에 나타낸 바와같이, 강판(1)을 아연이 녹아있는 포트(2)에 침적 통과시키므로써 이루어진다.Continuous molten plating equipment is a cold rolling / surface treatment equipment for applying zinc molten liquid to the surface of steel sheet. As shown in FIG. 1, the steel sheet 1 is passed through a zinc-melted port 2 by immersion. Is done.

이때, 강판(1)은 연속적으로 이송되며, 포트(2) 상부로부터 강판(1)이 아연 용융면으로 진입하고 싱크롤(3)에 감겨 방향전환된 후 상부의 교정롤(4) 및 변형방지롤(5) 을 거쳐 다시 용융면 밖으로 출수된다.At this time, the steel sheet 1 is continuously transferred, from the upper portion of the port 2, the steel sheet 1 enters the molten zinc surface and is wound around the sink roll 3 to be redirected to the upper straightening roll 4 and the deformation prevention. The water is again discharged out of the molten surface via the roll 5.

여기에서, 용융도금액 탕면에 가깝게 위치한 변형방지롤(5)은 강판(1)의 진동을 억제하기 위하여 설치되며, 교정롤(4)은 강판(1)의 반곡(curvature)을 제거하기 위하여 설치된다.Here, the deformation preventing roll (5) located close to the molten plating liquid bath surface is installed to suppress the vibration of the steel sheet (1), the straightening roll (4) is installed to remove the curvature (curvature) of the steel sheet (1) do.

이 과정에서 강판표면에 아연 용융액이 자연 도포되는데 이와같은 자연적으로 부착(도금)된 표면은 융융 도금두께 측면에서 일정하지 않으며 도금무늬도 불균일하게 된다.In this process, zinc molten liquid is naturally applied to the surface of the steel sheet. Such naturally adhered (plated) surface is not uniform in terms of fusion plating thickness and the plating pattern is also uneven.

따라서, 도금 출수면 상부 일정위치에 에어나이프(6)를 설치하여 도금층의 두께를 소정의 설정치로 재단하고 무늬를 균일하게 만든다. 이때, 용융도금층을 설정한 두께로 재단하기 위하여 에어나이프(6) 위치에서 강판(1)이 완전 평면형상을유지하는 것이 중요하다.Therefore, the air knife 6 is provided at a predetermined position above the plating water extraction surface to cut the thickness of the plating layer to a predetermined set value and to make the pattern uniform. At this time, in order to cut the hot-dip plating layer to the set thickness, it is important that the steel plate 1 maintain the completely flat shape at the air knife 6 position.

그런데, 도 2와 같이, 일정 두께의 강판(1)이 일정 직경의 롤(R)에 의하여 굽힘을 당하게 되면 강판(S)에 대하여 폭방향 및 길이방향으로 다소의 변형이 수반된다.By the way, as shown in FIG. 2, when the steel plate 1 of predetermined thickness is bent by the roll R of a predetermined diameter, some deformation | transformation is accompanying with respect to the steel plate S in the width direction and the longitudinal direction.

이때, 폭방향으로 생기는 C-형태의 변형을 C-반곡(gutter)이라고 하고, 길이방향으로 생기는 L-형태의 변형을 L-반곡(curl)이라고 칭한다.At this time, the C-shaped deformation occurring in the width direction is called C-butter, and the L-shaped deformation occurring in the longitudinal direction is called L-curl.

상기 용융도금 포트(2)에서도 강판(1)이 싱크롤(3)에 의하여 굽힘을 받고, 또한 변형방지롤(5)에 대하여 굽힘을 받을때, 불가피하게 전술한 변형이 수반된다.When the steel plate 1 is also bent by the sink roll 3 and is also bent against the deformation preventing roll 5, the above-described deformation is inevitably accompanied by the above-described hot dip plating port 2.

즉, 싱크롤(3)에 의하여 굽힘을 받으면 강판에는 C-반곡 및 L-반곡이 생성된다.That is, when bent by the sink roll 3, C-bending and L-bending are produced in the steel sheet.

그리고, 강판은 길이방향 또는 이송방향에 대하여 일정한 장력이 작용하므로 연질재 또는 박판재에 대하여 L-반곡은 표면적으로 나타나지 않는 반면 고강도재 또는 두꺼운 판재에 대하여는 강판의 강성(Stiffness) 때문에 길이방향의 L-반곡이 발생하게 된다.In addition, since the steel plate has a constant tension in the longitudinal direction or the feeding direction, L-curvature does not appear on the surface of the soft material or the thin plate material, while L-length in the longitudinal direction of the steel plate is high due to the stiffness of the steel plate. A half-curve will occur.

이러한, L-반곡은 도 3과 같이 강판의 패스라인을 변화시키게 된다.This, L-bending will change the pass line of the steel sheet as shown in FIG.

또한, 폭방향으로는 외력이 작용하지 않고 자유롭기 때문에 롤들을 통과하면서 일정량의 C-반곡이 외관상으로도 나타나게 된다.In addition, since the external force does not act in the width direction and is free, a certain amount of C-bending appears in appearance as it passes through the rolls.

따라서, 싱크롤(3)에 의하여 변형된 상태로 강판(1)이 에어나이프(6)를 통과하게 되면 에어나이프(6) 위치에서 강판(1)이 완전평면 및 패스라인을 벗어나 전후좌우 대칭상태를 유지하지 못하기 때문에 원활한 에어나이핑이 이루어지지 않으며,균일한 도금분포 및 도금두께를 원하는 바대로 확보할 수 없게 된다.Therefore, when the steel sheet 1 passes through the air knife 6 in a state deformed by the sink roll 3, the steel plate 1 moves out of the full plane and the pass line at the position of the air knife 6, and is symmetrical with the front, rear, left, and right sides. Since it does not maintain a smooth air knife is not made, uniform plating distribution and plating thickness can not be secured as desired.

본 발명은 상술한 바와 같은 종래 기술이 갖는 제반 문제점을 감안하여 이를 해결하고자 창출된 것으로, 연속용융도금설비의 싱크롤에 의하여 발생한 강판의 폭방향 변형인 C-반곡억제 뿐만 아니라 길이방향의 변형인 L-반곡에 의하여 나타나는 패스라인의 변화를 억제하기 위하여 패스라인을 직접적으로 결정하는 상부에 위치한 변형방지롤의 위치를 강판에 수직방향으로 일정범위 변화시킬 수 있도록 하므로써 에어나이프의 도금량 절삭 성능을 향상시켜 도금량 편차감소 등 도금품질을 향상시킬 수 있도록 한 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정장치 및 그 방법을 제공함에 그 목적이 있다.The present invention has been made in view of the above-described problems of the prior art, and the present invention was developed to solve this problem, and the deformation in the longitudinal direction as well as the C-bending suppression, which is the widthwise deformation of the steel sheet caused by the sink roll of the continuous hot dip plating facility. In order to suppress the change of the pass line caused by L-bending, it is possible to change the position of the deformation prevention roll located at the upper part which directly determines the pass line in a direction perpendicular to the steel plate, thereby improving the cutting amount of air knife plating performance. It is an object of the present invention to provide an apparatus and a method for adjusting a pass line and a semi-curvature of a transfer steel sheet at an upper part of a hot dip plating port to improve plating quality such as a reduction in plating amount variation.

도 1은 일반적인 연속용융도금설비의 아연포트의 롤 구성도,1 is a roll configuration of a zinc pot of a typical continuous hot dip plating equipment,

도 2는 이송강판의 롤 굽힘시 강판의 강성에 의한 변형을 보인 예시도 및 그래프,2 is an exemplary view and a graph showing a deformation due to the rigidity of the steel sheet when the roll bending of the conveying steel sheet;

도 3은 종래 강판의 굽힘변형거동 해석결과 그래프,3 is a graph of the analysis results of bending deformation behavior of a conventional steel sheet,

도 4는 본 발명 장치의 개략적인 구성도,4 is a schematic configuration diagram of an apparatus of the present invention;

도 5는 본 발명 방법을 설명하기 위한 모식도.5 is a schematic view for explaining the method of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1....강판 3....싱크롤1 .... steel plate 3 .... sink roll

4....교정롤 5....변형방지롤4 .... calibration roll 5 .... deformation prevention roll

6....에어나이프 7....갭센서6 .... airknife 7 .... gap sensor

10....구동모터 12....스크류샤프트10 .... driving motor 12 .... screw shaft

14....가이드블럭 16....작동바14..Guide block 16 .... Operation bar

본 발명의 상기한 목적은, 용융아연도금된 강판이 지나가는 패스라인의 에어나이프 하방 인접측에 설치된 구동모터와; 상기 구동모터의 회전축에 고정된 스크류샤프트와; 상기 스크류샤프트를 따라 이동가능하게 치합된 가이드블럭과; 상기 가이드블럭에 고정되어 좌우이동가능하게 배설된 교정롤 및 변형방지롤을 포함하여 구성되는 것을 특징으로 하는 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정장치를 제공함에 의해 달성된다.The above object of the present invention is a drive motor provided on the adjacent side of the air knife below the pass line through which the hot-dip galvanized steel sheet passes; A screw shaft fixed to the rotation shaft of the drive motor; A guide block movably engaged along the screw shaft; It is achieved by providing a pass line and semi-bending deformation adjusting device of the conveying steel sheet on the hot-dip galvanizing port characterized in that it comprises a straightening roll and a deformation prevention roll fixed to the guide block so as to move left and right.

또한, 본 발명은 에어나이프의 상방에 설치된 갭센서를 통해 강판과 정상적인 패스라인과의 이탈량을 측정하는 제1과정과; 상기 이탈량에 따라 각 구동모터를 정역회전시키면서 교정롤 및 변형방지롤를 좌우로 유동시키는 제2과정과; 상기 제2과정을 수차례 반복하면서 반곡이 제로지점에 수렴되는 설정된 한계반복까지 교정한 후 그 지점에서 구동모터의 구동을 정지시키는 제3과정으로 이루어진 것을 특징으로 하는 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정방법을 제공함에 의해 달성된다.In addition, the present invention comprises a first step of measuring the amount of deviation between the steel sheet and the normal pass line through the gap sensor installed above the air knife; A second step of flowing the straightening roll and the deformation preventing roll to the left and right while reversely rotating each driving motor in accordance with the deviation amount; Repeating the second process a number of times, and the third process for correcting the set limit repeat that convergence to the zero point and then stops the driving of the drive motor at the point of the transfer steel plate on the top of the hot-dip plating port By providing a method for adjusting the pass line and the semi-curvature.

도 4는 본 발명 장치의 개략적인 설치상태를 보인 모식도이고, 도 5는 본 발명 방법을 설명하기 위한 개념도이다.4 is a schematic view showing a schematic installation state of the apparatus of the present invention, Figure 5 is a conceptual diagram for explaining the method of the present invention.

도 4 및 도 5에 따르면, 본 발명 조정장치는 교정롤(4)과 변형방지롤(5)의 상하간격을 어느정도 유지시킨 상태에서 강판(1)이 패스되면서 상기 강판(1)의 진행방향 상하부를 서로 어긋나는 형태로 가압할 수 있도록 하되 설정된 유동거리 내에서 동작되도록 구성된다.According to Figures 4 and 5, the adjustment device of the present invention, while the steel sheet 1 passes in a state of maintaining the vertical gap between the straightening roll 4 and the deformation preventing roll 5 to some extent, the upper and lower portions in the traveling direction of the steel sheet 1 It is configured to be pressurized in a form that deviates from each other, but is configured to operate within a set flow distance.

이를 위해, 에어나이프(6)의 상측에는 정상적인 패스라인(P)으로부터 강판(1)이 얼마나 벗어나 진행되는지 그 갭(G)을 측정할 수 있는 공지의 갭센서(7)가 부설된다.To this end, a well-known gap sensor 7 is provided on the upper side of the air knife 6 that can measure the gap G of how far the steel sheet 1 proceeds from the normal pass line P.

특히, 상기 강판(1)은 싱크롤(3)을 지난후에 기존과 같이 수직방향으로 진행되는 것이 아니라 교정롤(4)과 변형방지롤(5)에 의해 경사진행되도록 유지함이 바람직하다.In particular, the steel sheet 1 is preferably maintained after the sink roll 3 to be inclined by the straightening roll 4 and the deformation preventing roll 5, rather than proceeding in the vertical direction as before.

그리고, 상기 교정롤(4)과 변형방지롤(5)은 서로 동일한 구동수단에 의해 좌우 유동되게 된다.The straightening roll 4 and the deformation preventing roll 5 are left and right flowed by the same driving means.

상기 구동수단은 구동모터(10)와, 상기 구동모터(10)의 회전축에 고정된 스크류샤프트(12)와, 상기 스크류샤프트(12)를 따라 이동가능하게 치합된가이드블럭(14)과, 일단은 상기 가이드블럭(14)에 고정되고 타단에는 상기 변형방지롤(5)이 고정된 작동바(16)로 구성된다.The driving means includes a drive motor 10, a screw shaft 12 fixed to a rotation shaft of the drive motor 10, a guide block 14 movably engaged along the screw shaft 12, and Is fixed to the guide block 14 and the other end is composed of the operation bar 16, the deformation preventing roll 5 is fixed.

이들 구성요소들은 도시하지 않았으나 별도의 지지체에 의해 견고히 고정됨은 물론이다.Although these components are not shown, of course it is firmly fixed by a separate support.

이러한 구성으로 이루어진 본 발명의 작동관계는 다음과 같다.The operating relationship of the present invention made of such a configuration is as follows.

먼저, 갭센서(7)는 미리 설정된 패스라인(P)과 실제 진행되는 강판(1) 사이의 거리, 즉 갭(G)을 측정하여 조업자가 확인할 수 있는 디스플레이 수단으로 송출하면 조업자는 수신된 측정치를 보면서 구동모터(10)를 구동시켜 변형방지롤(5)의 위치를 조정하게 된다.First, the gap sensor 7 measures the distance between the preset pass line P and the steel plate 1 that is actually being processed, that is, the gap G, and sends the gap to the display means that the operator can confirm. While driving the driving motor 10 to adjust the position of the deformation prevention roll (5).

그런데, 이와 같이 강판(1)을 패스라인(P)에 일치시키도록 변형방지롤(5)의 위치를 조정하게 되면 포트(2)의 롤(4,5)간 상호위치가 변화되므로 이미 교정된 C-반곡에 영향을 미치게 된다.However, when the position of the deformation prevention roll 5 is adjusted to match the steel sheet 1 to the pass line P, the mutual positions between the rolls 4 and 5 of the port 2 are changed, and thus the correction is made. Will affect the C-bending.

따라서, 이 상태에서 교정롤(4)을 재조정하여 C-반곡을 제거하도록 하게 된다.Therefore, in this state, the calibration roll 4 is readjusted to remove the C-bending.

그러면, 이번에는 L-반곡이 다시 발생하게 된다.This time, the L-bending occurs again.

그러나, 이와 같은 작업을 반복하게 되면 C-반곡 및 L-반곡이 점차로 0(zero)로 수렴하게 되므로 미리 설정한 한계반곡 범위까지 교정하게 되면 교정작업을 멈춘도록 한다.However, if the above operation is repeated, the C- and L-curves gradually converge to zero, so that the calibration operation stops when the correction is performed to the preset limit curvature range.

이와 같은 과정을 통해 자동적으로 반곡 및 패스라인을 교정할 수 있게 된다.This process automatically corrects the bounce and passline.

이상에서 상세히 설명한 바와 같이, 본 발명은 용융도금설비의 포트내 교정롤과 변형방지롤을 유동시켜 조절함으로써 강판에 나타나는 반곡 및 패스라인의 이탈을 교정할 수 있게 되고, 이로 인해 도금편차를 줄일 수 있게 된다.As described above in detail, the present invention can correct the deviation of the bending and pass lines appearing on the steel sheet by adjusting the flow of the calibration roll and the deformation prevention roll in the pot of the hot-dip plating equipment, thereby reducing the plating deviation Will be.

Claims (2)

용융아연도금된 강판(1)이 지나가는 패스라인(P)의 에어나이프(6) 하방 인접측에 설치된 구동모터(10)와;A drive motor 10 provided on the lower side adjacent to the air knife 6 of the pass line P through which the hot-dip galvanized steel sheet 1 passes; 상기 구동모터(10)의 회전축에 고정된 스크류샤프트(12)와;A screw shaft 12 fixed to a rotating shaft of the drive motor 10; 상기 스크류샤프트(12)를 따라 이동가능하게 치합된 가이드블럭(14)과;A guide block (14) movably engaged along the screw shaft (12); 상기 가이드블럭(14)에 고정되어 좌우이동가능하게 배설된 교정롤(4) 및 변형방지롤(5)을 포함하여 구성되는 것을 특징으로 하는 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정장치.Pass line and semi-curvature adjustment of the transfer steel plate in the upper part of the hot-dip plating port, characterized in that it comprises a straightening roll (4) and the deformation prevention roll (5) fixed to the guide block 14 so as to be movable left and right Device. 에어나이프(6)의 상방에 설치된 갭센서(7)를 통해 강판(1)과 정상적인 패스라인(P)과의 이탈량을 측정하는 제1과정과;A first step of measuring a deviation amount between the steel plate 1 and the normal pass line P through a gap sensor 7 provided above the air knife 6; 상기 이탈량에 따라 각 구동모터(10)를 정역회전시키면서 교정롤(4) 및 변형방지롤(5)를 좌우로 유동시키는 제2과정과;A second process of flowing the straightening roll 4 and the deformation preventing roll 5 from side to side while rotating each of the driving motors 10 forward and backward according to the deviation amount; 상기 제2과정을 수차례 반복하면서 반곡이 제로지점에 수렴되는 설정된 한계반복까지 교정한 후 그 지점에서 구동모터(10)의 구동을 정지시키는 제3과정으로 이루어진 것을 특징으로 하는 용융도금포트 상부에서 이송강판의 패스라인 및 반곡변형 조정방법.In the upper part of the hot-dip plating port characterized in that the second process is repeated a number of times, the third process of stopping the driving of the drive motor 10 at that point after the calibration to the set limit repeat that the half-turn converges to the zero point Pass line and semi-curvature adjustment of feed steel.
KR1020020051441A 2002-08-29 2002-08-29 Apparatus and method of correcting the pass line of strip at the level of air knife KR20040019731A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100868092B1 (en) * 2007-05-16 2008-11-10 주식회사 포스코 Deformation levelling machine of galvanized steel sheets
KR101235751B1 (en) * 2005-12-15 2013-02-21 주식회사 포스코 Leveling apparatus of strip with foreign substances elimination function in return duct of bright annealing furnace
KR101480341B1 (en) * 2013-09-13 2015-01-08 김근영 Apparatus for coating molten metal

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JPS6230865A (en) * 1985-07-31 1987-02-09 Sumitomo Metal Ind Ltd Method and apparatus for producing metal hot dipped strip
JPH01268852A (en) * 1988-04-21 1989-10-26 Sumitomo Metal Ind Ltd Continuous hot dip coating device for metallic strip
JPH0254746A (en) * 1988-08-18 1990-02-23 Kawasaki Steel Corp Method for preventing of warpage in band-like material in the cross direction
JPH05287478A (en) * 1992-04-07 1993-11-02 Nippon Steel Corp Production of hot dip metal coated strip and apparatus therefor
JPH0681094A (en) * 1992-08-31 1994-03-22 Hitachi Ltd Plating device for continuous hot dip metal coating line

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230865A (en) * 1985-07-31 1987-02-09 Sumitomo Metal Ind Ltd Method and apparatus for producing metal hot dipped strip
JPH01268852A (en) * 1988-04-21 1989-10-26 Sumitomo Metal Ind Ltd Continuous hot dip coating device for metallic strip
JPH0254746A (en) * 1988-08-18 1990-02-23 Kawasaki Steel Corp Method for preventing of warpage in band-like material in the cross direction
JPH05287478A (en) * 1992-04-07 1993-11-02 Nippon Steel Corp Production of hot dip metal coated strip and apparatus therefor
JPH0681094A (en) * 1992-08-31 1994-03-22 Hitachi Ltd Plating device for continuous hot dip metal coating line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101235751B1 (en) * 2005-12-15 2013-02-21 주식회사 포스코 Leveling apparatus of strip with foreign substances elimination function in return duct of bright annealing furnace
KR100868092B1 (en) * 2007-05-16 2008-11-10 주식회사 포스코 Deformation levelling machine of galvanized steel sheets
KR101480341B1 (en) * 2013-09-13 2015-01-08 김근영 Apparatus for coating molten metal

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