KR20030052336A - Adaptive coating weight controller in continuous steel strip galvanizing process - Google Patents
Adaptive coating weight controller in continuous steel strip galvanizing process Download PDFInfo
- Publication number
- KR20030052336A KR20030052336A KR1020010082222A KR20010082222A KR20030052336A KR 20030052336 A KR20030052336 A KR 20030052336A KR 1020010082222 A KR1020010082222 A KR 1020010082222A KR 20010082222 A KR20010082222 A KR 20010082222A KR 20030052336 A KR20030052336 A KR 20030052336A
- Authority
- KR
- South Korea
- Prior art keywords
- plating amount
- coating weight
- plating
- amount
- pressure
- Prior art date
Links
Classifications
-
- 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
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- 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
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/06—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with a blast of gas or vapour
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D5/00—Control of dimensions of material
- G05D5/02—Control of dimensions of material of thickness, e.g. of rolled material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
본 발명은 제철소의 강판 용융도금공정에서 아연욕조를 통과한 강판의 표면에 부착된 아연도금부착량을 수요가의 주문도금량에 맞추도록 공기압력을 분사하는 에어나이프의 제어장치에 관한 것으로서, 보다 상세하게는 강판의 목표도금량의 변경시나 라인속도(강판의 이송속도)의 변경시의 도금량 예측제어의 성능을 향상시켜서 강판에 부착되는 도금량과 수요가의 주문도금량간의 차이를 최소화하도록 에어나이프의 에어 분사압력을 조절하는 강판 용융도금공정에서의 적응형 도금량 제어장치에 관한 것이다.The present invention relates to a control device of an air knife for injecting air pressure to match the amount of zinc plating adhered to the surface of the steel sheet passed through the zinc bath in the steel plate hot dip plating process of the steel mill to meet the demand plating amount of the demand. Improves the performance of the plating amount prediction control when the target plating amount of steel sheet is changed or when the line speed (steel plate feed speed) is changed to minimize the difference between the plating amount attached to the steel sheet and the order plating amount of the demand The present invention relates to an adaptive plating amount control apparatus in a steel plate hot dip plating process for adjusting the pressure.
일반적으로, 제철소에서 제조되는 강판(strip)은 도금공정이 필요하다. 이는 강판의 내식성등을 향상시키는 동시에, 외관을 미려하게 하기 위하여 실시하며, 현재에는 강판의 사용환경 즉, 특수한 목적에 사용되는 전기강판 또는 자동차용 강판등에서 이와 같은 도금공정은 상당히 중요한 작업공정이다.In general, the steel sheet (strip) produced in steel mills need a plating process. This is done to improve the corrosion resistance and the like of the steel sheet and to make the appearance beautiful. At present, such a plating process is a very important work process in the use environment of the steel sheet, that is, an electric steel sheet or an automobile sheet used for a special purpose.
대표적인 도금방법으로서, 용융도금액이 저장된 욕조에 강판을 통과시키어 도금을 수행하는 용융도금법과, 전해액을 이용한 전기도금법등이 있고, 대표적인 도금 작업으로서 아연도금강판의 용융아연 도금공정을 들 수 있다.Representative plating methods include a hot dip plating method for performing plating by passing a steel plate through a bath in which a hot dip plating solution is stored, an electroplating method using an electrolytic solution, and the like and a hot dip galvanizing process of a galvanized steel sheet.
그리고, 상기 용융도금공정에서는 용융아연과 같은 용융상태의 도금액이 저장된 욕조를 강판이 통과하면서 그 표면에 부착되는 방식으로 도금작업을 수행하기 때문에 강판의 도금량을 조절하기 위하여 별도의 설비가 필요하다.Further, in the hot dip plating process, a plating operation is performed in such a manner that the steel sheet passes through a bath in which a plating liquid in a molten state such as molten zinc is stored, and adheres to the surface thereof, and thus separate equipment is required to control the plating amount of the steel sheet.
통상적으로는, 강판의 도금량 조절을 위해 욕조를 통과한 강판의 표면에 에어 나이프로서 적정한 분사압력의 에어를 분사하여 강판 표면에 부착된 도금부착량을 수요가의 주문도금량에 맞추어 조절하고 있으며, 이와 같은 에어 나이프를 이용한 도금량제어방식을 에어 와이핑(air wiping)방식이라 한다.In general, to adjust the plating amount of the steel sheet, the surface of the steel sheet that has passed through the bath is sprayed with an air knife with an air jet pressure to adjust the amount of plating adhered to the surface of the steel sheet according to the demand plating amount of the demand. Plating amount control method using an air knife is called an air wiping method.
도 1은 에어 와이핑(Air Wiping)방식에 의한 강판의 도금량 제어공정을 개략적으로 도시한 것이다.FIG. 1 schematically shows a plating amount control process of a steel sheet by an air wiping method.
도 1에서 도시한 바와 같이, 에어와이핑방식은 강판(100)이 아연욕조(110)를 통과하면서 용융아연(120)이 강판(100)의 표면에 융착된 후에, 부착된 도금량을 수요가의 주문 도금량에 맞추기 위해서 아연욕조(110)의 탕면 상측에 설치된 에어나이프(130)를 설치하고 에어를 분사하여 강판(100) 표면에 부착된 용융아연의 부착 도금량을 적절하게 깍아 지도록 되어 있다.As shown in FIG. 1, in the air wiping method, after the molten zinc 120 is fused to the surface of the steel sheet 100 while the steel sheet 100 passes through the zinc bath 110, the amount of plating attached is determined according to demand. In order to match the order of plating amount, the air knife 130 installed above the hot water surface of the zinc bath 110 is installed, and the air is sprayed to properly cut the adhesion plating amount of the molten zinc adhered to the surface of the steel sheet 100.
상기와 같은 에어 와이핑방식의 도금량 제어시에는 목표도금량이 상이한 두 강판의 경계부인 용접부가 에어나이프 통과하는 경우, 다음 강판의 목표도금량에 맞게 에어나이프의 압력설정값을 변경해야 할 필요가 있다.In the air wiping control of the coating amount as described above, when the welded portion, which is the boundary between two steel sheets having different target plating amounts, passes through the air knife, it is necessary to change the pressure setting value of the air knife according to the target plating amount of the next steel sheet.
이를 위하여, 기존에는 조업자가 경험적으로 압력을 조정하거나, 과거의 목표도금량별 에어나이프 압력값 테이블을 이용하는 방식을 사용하였다.To this end, conventionally, the operator has used the method of adjusting the pressure empirically or using the air knife pressure value table for each target plating amount in the past.
또한, 상기와 같은 종래의 강판 도금량 제어방식에 있어서, 강판의 이송속도가 변경될 경우에 발생하는 도금량 변화량을 미리 보상하기 위해서 에어나이프의 압력설정값을 강판의 이송속도의 변화에 따라 변경해야 할 필요가 있다.Further, in the conventional steel plate plating amount control method as described above, in order to compensate in advance the amount of plating amount change generated when the feed rate of the steel sheet is changed, the pressure set value of the air knife must be changed in accordance with the change of the feed rate of the steel sheet. There is a need.
이를 위해 기존에는 조업자가 경험적으로 강판의 이송속도 변경량에 따라 압력을 조절하거나, 과거의 강판의 이송속도 변화별 에어나이프 압력설정값 변화량 테이블을 이용하는 방식을 사용하다.To this end, conventionally, the operator empirically adjusts the pressure according to the feed rate change of the steel sheet, or uses the air knife pressure set value change amount table for each feed rate change of the steel sheet in the past.
그러나, 상기 조업자의 경험적 조절은 정확하지 못하고, 테이블을 이용하는 방식은 정기적인 수리 때마다 변화하는 에어나이프의 특성에 맞게 테이블의 모든 값들을 튜닝하기가 어려워서, 실제로 사용이 불가능하다는 문제점이 있다.However, the operator's empirical adjustment is inaccurate, and the method of using the table is difficult to tune all the values of the table according to the characteristics of the air knife changing at regular repairs.
결과적으로, 목표도금량과 도금부착량간의 오차를 최소화 하기위해서 필수적으로 수행되어야 하는 목표도금량 변경시, 라인속도 변경시의 에어나이프 압력설정값의 변경이 부정확하게 수행됨에 따라서 강판의 도금공정시 적정량이 도금되지 않는 도금미달 현상 또는 적정량 이상으로 도금되는 과도금 현상이 빈번하게 발생시키며, 이는 제품품량은 물론, 과도금시에는 필요이상으로 용융아연을 사용하게 되어 추가적인 비용발생의 원인을 제공하는 등의 여러 문제점들이 있는 것이다.As a result, when changing the target plating amount, which is essential to minimize the error between the target plating amount and the coating amount, the air knife pressure setting value is incorrectly changed when the line speed is changed. Unplated phenomena that are not under plating or overplating phenomenon that occur more than a proper amount frequently occur, which is caused by additional use of molten zinc more than necessary when overplating, as well as providing additional causes. There are problems.
본 발명은 상기와 같은 종래의 여러 문제점들을 개선시키기 위하여 제안된 것으로서, 그 목적은 강판의 목표도금량 변경시나 라인속도 변경시에 반드시 필요한 도금량 예측제어를 정확하게 수행토록 도금량 수식모델과 그 모델의 파라미터를 적응시켜서, 정기적인 수리나 도금공정의 물리적인 변화가 발생하더라도 강판의 부착되는 도금량과 목표도금량의 차이가 항상 최소가 되도록 한 강판 용융도금공정에서의 적응형 도금량 제어장치를 제공하는 데에 있다.The present invention has been proposed in order to improve the above-mentioned various problems. The object of the present invention is to accurately calculate the plating amount equation model and the parameters of the model so as to accurately perform the plating amount prediction control necessary at the time of changing the target plating amount or the line speed of the steel sheet. The present invention provides an adaptive plating amount control device in a steel plate hot dip plating process in which the difference between the plating amount and the target plating amount of the steel sheet is always minimized even if a periodic repair or physical change of the plating process occurs.
도1은 종래의 용융도금공정에서의 강판 도금량 제어장치를 도시한 개략도1 is a schematic view showing a steel plate plating amount control apparatus in a conventional hot dip plating process
도 2는 본 발명에 따른 강판 용융도금공정에서의 도금량 제어장치를 도시한 전체구성도Figure 2 is an overall configuration diagram showing a plating amount control device in the steel plate hot dip plating process according to the present invention
* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
100: 강판110: 아연 욕조100: steel plate 110: zinc bath
112: 싱크롤120: 용융아연 탕면112: sink roll 120: molten zinc hot water
130: 에어나이프(Air Knife)140: 도금량 측정센서130: Air Knife 140: plating amount measuring sensor
141: 도금량 측정값150: 압력 조절 밸브141: plating amount measurement 150: pressure regulating valve
160: 압력제어기200: 도금량 수식모델160: pressure controller 200: plating amount formula model
210: 프리세트(Preset) 제어기210: Preset Controller
220: 피드포워드(Feedforward) 제어기220: feedforward controller
230: 파라미터 추정기230: parameter estimator
300: 적응형 도금량 제어장치300: adaptive plating amount control device
상기와 같은 목적을 달성하기 위한 기술적인 구성으로서 본 발명은 도금량측정센서와 도금욕조를 통과한 강판에 에어를 분사하여 도금량을 조절하는 에어나이프와 상기 에어나이프로 분사되는 에어의 압력을 조절하는 압력조절기를 포함하는용융도금공정에서의 적응형 도금량 제어장치에 있어서,The present invention as a technical configuration for achieving the above object is an air knife for controlling the plating amount by injecting air to the steel sheet passed through the plating amount sensor and the plating bath and the pressure to control the pressure of the air injected into the air knife In the adaptive plating amount control apparatus in the hot dip plating process comprising a regulator,
강판의 이송속도와, 에어나이프와 강판간의 간격, 및 에어나이프의 압력 변화량에 대하여 파라미터 α, β, γ를 이용하여 도금량의 변화량을 계산하는 도금량 모델부;A plating amount model unit which calculates a change amount of the plating amount by using the parameters α, β, and γ with respect to the feed rate of the steel plate, the distance between the air knife and the steel plate, and the pressure change amount of the air knife;
상기 도금량측정센서에서 실측된 도금량 측정값과 상기 도금량 모델부에서 계산된 도금량 계산값의 차이가 최소화 되도록 상기 도금량 모델의 파라미터 α, β, γ를 추정하는 파라미터추정기;A parameter estimator for estimating parameters α, β, and γ of the plating amount model to minimize a difference between the plating amount measurement value measured by the plating amount measurement sensor and the plating amount calculation value calculated by the plating amount model unit;
강판의 목표도금량이 변할 경우에 도금량을 목표도금량에 맞추기 위해 에어나이프의 압력을 미리 설정하는 프리셋트 제어기; 및,A preset controller which presets the pressure of the air knife to adjust the plating amount to the target plating amount when the target plating amount of the steel sheet is changed; And,
강판의 이송속도가 변할 경우에 이속속도의 변경에 따른 도금량 변화량을 보상하기 위해 에어나이프의 압력을 미리 조절하기 위한 피드포워드제어기로 구성되는 것을 특징으로 한다.When the feed rate of the steel sheet is changed, it is characterized by consisting of a feed forward controller for pre-adjusting the pressure of the air knife in order to compensate for the amount of plating amount change due to the change of the speed.
이하, 첨부된 도면에 의거하여 본 발명인 강판 용융도금공정에서의 도금량 제어장치의 구성을 상세하게 설명하면 다음과 같다.Hereinafter, the structure of the plating amount control apparatus in the hot-plate steel plating process of the present invention based on the accompanying drawings in detail as follows.
도 2에서는 본 발명에 따른 강판 용융도금공정에서의 적응형 도금량 제어장치(300)의 전체 구성을 도시하고 있는데, 이와 같은 본 발명의 장치는 크게 파라미터추정기(230)를 포함한 도금량 수식모델(200)과, 프리세트제어기(210)와, 피드포워드제어기(220)로서 구성되는데, 이들 각각의 기능 및 구성을 보다 상세하게 살펴보면 다음과 같다.Figure 2 shows the overall configuration of the adaptive plating amount control apparatus 300 in the steel plate hot dip plating process according to the present invention, such apparatus of the present invention is largely the plating amount equation model 200 including the parameter estimator 230 And a preset controller 210 and a feedforward controller 220, which will be described in more detail as follows.
먼저, 도금량수식모델(200)은 다음의 수학식 1과 같이 도금량(W)을 세 개의파라미터 α, β, γ, 도금량 변화 요인인 강판과 에어나이프간의 간격(D), 에어나이프의 에어 압력(P), 강판의 이송속도인 라인속도(V)로서 표현된다.First, the plating amount equation model 200 has a plating amount (3) as shown in the following equation (1), the three parameters α, β, γ, the gap (d) between the steel plate and the air knife, which is the plating amount change factor, the air pressure of the air knife ( P) and the line speed which is the feed rate of the steel sheet.
즉, 현재시점 k에서의 각 변수를라 하고, 그 때 도금량을 Wk라 하고, 다음 시점 k+1 에서의 각 변수를라 하면, 다음 시점 k+1 에서의 도금량(Wk+1)은 아래의 수학식 1과 같이 구할 수 있다.That is, each variable at the current time k Then, the plating amount 때 k , and each variable at the next time k + 1 Assuming that, following coating weight (W k + 1) at the time k + 1 can be calculated as shown in Equation 1 below.
라 하고, ,
라 하고, ,
라 할때, When you say
상기의 도금량 수식모델의 변수(V, D, P)들은 모두 매 시점마다 측정되는 값이다.The variables (V, D, P) of the plating amount equation model are all measured at each time point.
다음으로, 강판의 목표도금량이 변경되는 시점에 적용되는 프리셋트제어기(210)를 살펴보면, 강판의 목표도금량이 Tk에서 Tk+1로 변할 경우에 다음시점의 에어나이프의 압력설정값(Pk+1)은 아래의 수학식 2와 같이 도출된다.Next, referring to the preset controller 210 applied when the target plating amount of the steel sheet is changed, when the target plating amount of the steel sheet is changed from T k to T k + 1 , the pressure set value P of the air knife at the next time point (P k + 1 ) is derived as in Equation 2 below.
다음으로, 강판의 이송속도가 변경되는 시점에 적용되는 피드포워드 제어기(220)를 살펴보면, 강판의 이송속도가 Vk에서 Vk+1로 변할 경우에 다음시점에서의 에어나이프의 압력설정값(Pk+1)은 아래의 수학식 3과 같이 도출된다.Next, looking at the feed forward controller 220 applied at the time when the feed rate of the steel sheet is changed, when the feed rate of the steel sheet is changed from V k to V k + 1 , the pressure set value of the air knife at the next time point ( P k + 1 ) is derived as in Equation 3 below.
그리고, 파마미터추정기(230)는 상기 수학식 1의 도금량 수식모델에서 세 개의 파라미터 α, β, γ를 항상 최적의 상태로 적응시키는 기능을 수행한다. 상기 파라미터 α, β, γ가 틀리면, 수학식 1에 의하여 계산된 도금량 Wk+1과 도금량측정센서(140)에서 측정된 실제 도금량측정값간에 오차가 발생한다. 이러한 오차를 최소화 하기 위한 파라미터 추정기(230)는 선형대수학에서 학술적인 용어로 회귀형 최소자승법(recursive least square method)이라고 불리우는 최적화 기법을 바탕으로 구현된다.In addition, the parameter estimator 230 performs a function of always adapting three parameters α, β, and γ to an optimal state in the plating amount equation model of Equation 1 above. If the parameters α, β, and γ are wrong, an error occurs between the plating amount W k + 1 calculated by Equation 1 and the actual plating amount measurement value measured by the plating amount measuring sensor 140. The parameter estimator 230 for minimizing such errors is implemented based on an optimization technique called a recursive least square method in academic terms in linear algebra.
이때, 본 발명은 회귀형 최소자승법을 이용하여 다음의 수학식 4와 같이 파라미터추정기(230)를 구현한다.In this case, the present invention implements the parameter estimator 230 as shown in Equation 4 using a regression least square method.
즉, 현재시점 k 에서 변수가 Vk, Dk, Pk인 경우에 도금량측정센서(140)에서 측정된 도금량 실측값을라 하고, 다음 시점 k+1 에서 변수가 Vk+1, Dk+1, Pk+1인 경우에 도금량측정센서(140)에서 측정된 도금량을라 하고 하면, 다음 시점 k+1 에서의 파라미터 αk+1, βk+1, γk+1는 다음의 수학식 4에 의해서 도출된다.That is, when the variable is V k , D k , P k at the present time k, the plating amount measured value measured by the plating amount measuring sensor 140 is obtained. If the variables are V k + 1 , D k + 1 , and P k + 1 at the next time point k + 1, In this case, the parameters α k + 1 , β k + 1 and γ k + 1 at the next time point k + 1 are derived by the following equation (4).
라 하고, ,
라 하면, Say,
이다. to be.
이와 같이, 본 발명의 적응형 도금량 제어장치에 의하면 종래의 목표도금량의 변화나 라인속도의 변화시에 부정확한 에어나이프 압력조절을 정확하게 조절하여 목표도금량과 실제 부착량간의 차이를 최소화 할 수 있어서, 도금미달 불량제품 및 과도금로 인한 아연손실을 최대한 막을 수 있어서 생산비 절감이 가능한 우수한 효과를 제공하는 것이다. 또한 본 발명의 파라미터 추정기는 에어나이프 설비 및 기타 도금량 관련 설비의 정기적 수리시 마다 발생하는 변화를 감안하여 도금량 수식모델을 적응시키기 때문에 정비에 대한 부담을 줄일 수 있는 효과를 제공한다.As described above, according to the adaptive plating amount control apparatus of the present invention, it is possible to minimize the difference between the target plating amount and the actual deposition amount by precisely adjusting the incorrect air knife pressure control when the conventional target plating amount or the line speed is changed. It is possible to prevent the loss of zinc due to poor products and over-plating as much as possible to provide an excellent effect that can reduce the production cost. In addition, the parameter estimator of the present invention provides an effect of reducing the burden on maintenance because it adapts the plating amount equation model in consideration of the changes occurring during the regular repair of the air knife facility and other plating amount related equipment.
Claims (5)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020010082222A KR100815684B1 (en) | 2001-12-21 | 2001-12-21 | Adaptive coating weight controller in continuous steel strip galvanizing process |
CN 02803067 CN1610763A (en) | 2001-08-24 | 2002-08-23 | Apparatus for controlling coating weight on strip in continuous galvanizing process |
JP2003523702A JP2004522002A (en) | 2001-08-24 | 2002-08-23 | Apparatus for controlling strip weight in continuous galvanizing process |
PCT/KR2002/001591 WO2003018859A2 (en) | 2001-08-24 | 2002-08-23 | Apparatus for controlling coating weight on strip in continuous galvanizing process |
US10/433,251 US20040050323A1 (en) | 2001-08-24 | 2002-08-23 | Apparatus for controlling coating weight on strip in continuous galvanizing process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020010082222A KR100815684B1 (en) | 2001-12-21 | 2001-12-21 | Adaptive coating weight controller in continuous steel strip galvanizing process |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20030052336A true KR20030052336A (en) | 2003-06-27 |
KR100815684B1 KR100815684B1 (en) | 2008-03-20 |
Family
ID=29577106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020010082222A KR100815684B1 (en) | 2001-08-24 | 2001-12-21 | Adaptive coating weight controller in continuous steel strip galvanizing process |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100815684B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100742834B1 (en) * | 2005-12-26 | 2007-07-25 | 주식회사 포스코 | System for controlling a plating amount in hot dipping process |
KR100815815B1 (en) * | 2006-12-27 | 2008-03-20 | 주식회사 포스코 | Method for controlling coating weight on strip in continuous galvanizing process |
KR20200062716A (en) | 2018-11-27 | 2020-06-04 | 주식회사 포스코 | System for controlling plating amount in hot dipping process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101517772B1 (en) | 2013-08-23 | 2015-05-06 | 주식회사 포스코 | Method for controlling dip coating weight in hot dip coating process |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100332895B1 (en) * | 1995-08-22 | 2002-09-27 | 주식회사 포스코 | Method for controlling longitudinal plating adhesion quantity of strip in continuous hot dip galvanizing line |
KR100380728B1 (en) * | 1996-12-24 | 2003-07-23 | 주식회사 포스코 | Plating adhesion quantity control system and plating adhesion quantity control method |
KR100393679B1 (en) * | 1999-08-18 | 2003-08-06 | 주식회사 포스코 | Coating weight predictive control in continuous galvanizing line |
KR20020041235A (en) * | 2000-11-27 | 2002-06-01 | 이구택 | Method for controlling gilding amount in hot dipped galvanized iron process |
-
2001
- 2001-12-21 KR KR1020010082222A patent/KR100815684B1/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100742834B1 (en) * | 2005-12-26 | 2007-07-25 | 주식회사 포스코 | System for controlling a plating amount in hot dipping process |
KR100815815B1 (en) * | 2006-12-27 | 2008-03-20 | 주식회사 포스코 | Method for controlling coating weight on strip in continuous galvanizing process |
KR20200062716A (en) | 2018-11-27 | 2020-06-04 | 주식회사 포스코 | System for controlling plating amount in hot dipping process |
Also Published As
Publication number | Publication date |
---|---|
KR100815684B1 (en) | 2008-03-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7269330B2 (en) | Plating amount control device and plating amount control method | |
KR20180061275A (en) | Hot melt galvanized layer thickness control system and method for continuous thickness-variable strip material | |
CN105525248B (en) | A kind of galvanization production line thickness of coating feedforward optimal control method | |
KR100815684B1 (en) | Adaptive coating weight controller in continuous steel strip galvanizing process | |
WO2003018859A2 (en) | Apparatus for controlling coating weight on strip in continuous galvanizing process | |
CN106637026A (en) | Air knife pressure real-time optimization control method and system in galvanizing process | |
JP3291201B2 (en) | Apparatus and method for controlling plating amount | |
KR100742834B1 (en) | System for controlling a plating amount in hot dipping process | |
KR100393679B1 (en) | Coating weight predictive control in continuous galvanizing line | |
JP6238022B2 (en) | Method and apparatus for manufacturing molten metal plated steel sheet | |
KR102178674B1 (en) | System for controlling plating amount in hot dipping process | |
JPH06322504A (en) | Deposition controller for hot dip coated steel sheet | |
JP5577588B2 (en) | Plating adhesion amount control method and apparatus | |
JPH07243015A (en) | Plating deposition control method of continuous type hot dip metal coating line | |
KR101517772B1 (en) | Method for controlling dip coating weight in hot dip coating process | |
CN112840061B (en) | Plating amount control device and control method | |
KR100358009B1 (en) | Automatic control of plating amount in hot dip plating process | |
KR100584128B1 (en) | Coating weight control method by time delay compensation | |
KR20200022097A (en) | Apparatus and method for plating a steel sheet | |
KR20020050885A (en) | Apparatus for controlling coating weight on strip in continuous galvanizing process | |
KR100380729B1 (en) | Plating adhesion quantity control system using plating quantity profile and plating adhesion quantity control method | |
KR100530074B1 (en) | Air knife distance control apparatus and method for compensating the movement of strip passing line in continuous galvanizing line | |
JPH05171396A (en) | Production of galvannealed steel sheet | |
CN111850450B (en) | Zinc layer control method for differential thickness coating strip steel | |
JPH06336667A (en) | Method for controlling hot-dip coating weight |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
G170 | Publication of correction | ||
FPAY | Annual fee payment |
Payment date: 20130304 Year of fee payment: 6 |
|
FPAY | Annual fee payment |
Payment date: 20140314 Year of fee payment: 7 |
|
FPAY | Annual fee payment |
Payment date: 20150309 Year of fee payment: 8 |
|
FPAY | Annual fee payment |
Payment date: 20160308 Year of fee payment: 9 |
|
FPAY | Annual fee payment |
Payment date: 20170314 Year of fee payment: 10 |
|
FPAY | Annual fee payment |
Payment date: 20180313 Year of fee payment: 11 |
|
FPAY | Annual fee payment |
Payment date: 20200310 Year of fee payment: 13 |