KR0147784B1 - Measruing method for width directing plating quantum of plate sheet - Google Patents

Measruing method for width directing plating quantum of plate sheet

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Publication number
KR0147784B1
KR0147784B1 KR1019940035175A KR19940035175A KR0147784B1 KR 0147784 B1 KR0147784 B1 KR 0147784B1 KR 1019940035175 A KR1019940035175 A KR 1019940035175A KR 19940035175 A KR19940035175 A KR 19940035175A KR 0147784 B1 KR0147784 B1 KR 0147784B1
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KR
South Korea
Prior art keywords
plating
thickness
width direction
plate
width
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KR1019940035175A
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Korean (ko)
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KR960024269A (en
Inventor
박해두
제상국
Original Assignee
김만제
포항종합제철주식회사
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Application filed by 김만제, 포항종합제철주식회사 filed Critical 김만제
Priority to KR1019940035175A priority Critical patent/KR0147784B1/en
Publication of KR960024269A publication Critical patent/KR960024269A/en
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Publication of KR0147784B1 publication Critical patent/KR0147784B1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B15/00Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
    • G01B15/02Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness

Abstract

본 발명은 연속 도금공장에서 강판의 폭방향 도금 부착량을 측정 일부 과도금의 원인을 분석하여 균일한 도금부착이 가능하게 하고, 또한 부착량의 정밀한 측정결과로 도금판의 품질향상에 기여할 뿐만 아니라, 도금 공장에서 발생하는 빌드-업(도금 코일에서 폭방향으로 일부분이 볼록하게 나온것)에 의한 주문외 불량에 대한 정확한 원인을 분석하여 제품의 품질향상에 기여할 수 있도록 한 도금강판의 폭방향 도금부착량 측정방법에 관한 것이다.The present invention is to measure the coating amount of the width direction of the steel plate in the continuous plating factory to analyze the cause of some over-plating to enable uniform plating, and also to contribute to the improvement of the quality of the plate by precise measurement results of the coating amount, plating Measurement of width plated coating amount of plated steel sheet which contributes to product quality improvement by analyzing exact cause of out-of-order defects caused by factory-built build-up (a part of which is convex in the width direction from plating coil) It is about a method.

Description

도금강판의 폭방향 도금부착량 측정방법Measuring method of plating amount in width direction of plated steel sheet

본 발명은 연속 도금공장에서 강판의 폭방향 도금 부착량을 측정하여 일부 과도금의 원인을 분석함으로써 균일한 도금부착이 가능하게 하고, 부착량의 정밀한 측정결과로 도금판의 품질향상에 기여할 뿐만 아니라, 도금 공장에서 발생하는 빌드-업(도금 코일에서 폭방향으로 일부분이 볼록하게 나온것)에 의한 주문외 불량에 대한 정확한 원인을 분석하여 제품의 품질향상에 기여할 수 있도록 한 도금강판의 폭방향 도금부착략 측정방법에 관한 것이다.The present invention enables uniform plating evenly by measuring the width plating direction of the steel plate in the continuous plating factory to analyze the cause of some over-plating, and contributes to the improvement of the quality of the plated plate by precise measurement results of the plating, as well as the plating. Width plating of the plated steel plate, which contributes to the improvement of product quality by analyzing the exact cause of out-of-order defects caused by the build-up (parts convex in the width direction from the plating coil) occurring in the factory. It relates to a measuring method.

종래의 도금부착량 측정방법은 제1도의 (a)에서 나타낸 바와 같이 철판(1)에 도금층(2)과 같이 아연이 도금되어 있을 때 γ-ray 발생장치(3)에서 감마-레이를 발생시며 도금면에 투과시킬 때 형광 엑스-레이가 철과 아연의 성분량에 따라 다르게 방출된을 X-ray 검출기(4)로 인식하여 도금층(2)의 두께를 측정하는 방식이다.In the conventional method for measuring the deposition amount, as shown in FIG. 1A, when gamma-ray is generated in the gamma-ray generator 3 when zinc is plated on the iron plate 1 like the plating layer 2, the plating is performed. It is a method of measuring the thickness of the plating layer 2 by recognizing that the X-ray detector 4 emits the fluorescence X-ray differently depending on the amount of iron and zinc when transmitting to the surface.

또한, 제1도의 (b)와 같이 형광에너지 분출량을 카운터기로 식별하여 철판(1)의 두께를 환산하는 방식으로 측정하고 있다.In addition, as shown in (b) of FIG. 1, the amount of fluorescence energy emitted is identified by a counter, and the thickness of the iron plate 1 is measured.

일반적을 대부분의 도금공장에서 이와 같은 방식으로 도금량을 측정하는 방식을 채택하고 있지만, 도금욕(9)을 통과한 도금강판은 완전 응고상태가 아닌 반융용상태이고 이 상태에서의 온도도 약 200-300℃ 정도의 고온상태이므로 상기와 같은 형광 X-ray의 강도 측정에 의한 강판의 두께 측정은 정밀도를 가질 수 없으므로, 도금부착량의 경향차만 분석이 가능하고 절대적인 부착량의 두께를 측정하는 것이 불가능한 문제점이 있어 작업자들은 종래의 측정장치를 신뢰하지 않고 작업을 실시하고 있는 실정이다.In general, most plating factories adopt the method of measuring the coating amount in this manner, but the plated steel sheet passing through the plating bath 9 is not a solidification state but a semi-melting state and the temperature in this state is about 200-. Since it is a high temperature of about 300 ℃, the thickness measurement of the steel sheet by the intensity measurement of the fluorescent X-ray as described above can not have precision, it is possible to analyze only the tendency difference of the coating deposition amount, it is impossible to measure the thickness of the absolute deposition amount As a result, workers do not trust conventional measuring devices.

본 발명은 상기와 같은 문제점들은 감안하여 이를 해소하고자 발명한 것으로, 연속 도금공장에서 폭방향의 도금 부착량을 정확하게 측정하여 일부 과도금의 원인을 분석함으로써 균일한 도금부착이 가능하도록 하고, 도금 부착량의 정밀한 측정결과로 도금판의 품질향상에 기여할 뿐만 아니라, 도금공장에서 발생하는 빌드-업(도금 코일에서 폭방향으로 일부분이 볼록하게 나온 것)에 의한 주문외 불량에 대한 정확한 원인을 분석하여 제품의 품질향상에 기여할 수 있도록 하는 도금강판의 폭방향 도금부착량 측정방법을 제공함에 그 목적이 있다.The present invention has been invented to solve this problem in consideration of the above problems, by measuring the plating deposition amount in the width direction in the continuous plating factory to analyze the cause of some over-plating to enable uniform plating adhesion, The precise measurement result not only contributes to the improvement of the quality of the plate, but also analyzes the exact cause of the out-of-order defects caused by build-up (produced in the width direction from the plating coil) in the plating factory. It is an object of the present invention to provide a method for measuring the coating amount in the width direction of a plated steel sheet to contribute to quality improvement.

제1도는 종래의 도금부착량 측정방법의 개략도로써1 is a schematic diagram of a conventional plating deposition measurement method

(a)는 γ-ray 도급부착량 측정원리도(a) is the principle of measuring γ-ray contraction amount

(b)는 에너지 분포도(b) is the energy distribution map

제2도는 본 발명의 도금 부착량 측정방법의 개략도2 is a schematic view of the plating deposition measurement method of the present invention

제3도는 본 발명 강판의 폭방향 두께 측정방법을 나타낸 설명도3 is an explanatory diagram showing a width measuring method of the steel sheet of the present invention.

제4도는 본 발명의 일실시예에 따른 도금 전,후의 판 두께 프로파일 측정 결과도4 is a plate thickness profile measurement result before and after plating according to an embodiment of the present invention

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

1:철판 2:도금층1: iron plate 2: plating layer

3:γ-ray 발생장치 4:X-ray 검출기3: γ-ray generator 4: X-ray detector

5:도금 전 판 두께 측정기 6:도금 후 판 두께 측정기5: Plate thickness meter before plating 6: Plate thickness meter after plating

7:압력 조절기 8:판 중앙점 두께계7: Pressure regulator 8: Plate center point thickness meter

9:도금욕 10:에어 나이프 거리검출기9: plating bath 10: air knife distance detector

11;에어 나이프 12:모터11; air knife 12: motor

13:PLC 14:제어 연산기13: PLC 14: Control Operator

15:주행 판 16:센서 2 이송 안내기15: traveling plate 16: sensor 2 feed guide

17:센서 1 이송 안내기 18:거리센서 117: Sensor 1 transport guide 18: Distance sensor 1

19:거리센서 2 20:고정대19: Distance sensor 2 20: Fixture

이와 같은 목적을 갖는 본 발명은, 연속도금공장의 도금욕의 입, 출측에 각각 폭방향으로 이송되는 두 개의 거리센서가 설치된 도금 전 판 두께 측정기와 도금 후 판 두께 측정기를 설치하여 도금 전, 후의 판 두께를 각각 폭방향으로 연속적으로 측정하고, 상기 각각의 측정값으로부터 도금층의 두께를 구하고, 상기 도금층의 두께에 따라 에어 나이프의 작동을 조절하되, 상기 도금 전 두께 측정기와 도금 후 두께 측정기의 폭방향으로의 이송에 따른 오차를 보정함으로써 도금강판의 폭 방향 및 길이 방향으로의 균일한 도금을 얻을 수 있도록 함을 특징으로 한다.According to the present invention having the above object, before and after plating by installing a plate thickness meter before and a plate thickness meter installed with two distance sensors are transported in the width direction at the entrance and exit side of the plating bath of the continuous plating factory, respectively. The thickness of the plate was continuously measured in the width direction, and the thickness of the plated layer was obtained from the respective measured values, and the operation of the air knife was adjusted according to the thickness of the plated layer. It is characterized in that to obtain a uniform plating in the width direction and the longitudinal direction of the plated steel sheet by correcting the error due to the transfer in the direction.

이하, 상기와 같은 본 발명을 첨부된 도면에 의거하여 더욱 상세히 설명하면 다음과 같다.Hereinafter, the present invention as described above in more detail based on the accompanying drawings.

본 발명은 제2도에서 도시된 바와 같이 연속도금공장의 도금욕(9)의 입,출측에 도금 전 판 두께 측정기(5)와 도금 후 판 두께 측정기(6)를 각각 설치하고, 그 측정결과를 받은 제어 연산기(14)에서 그 결과를 분석하여 PLC(13)를 거쳐 모터(12)의 제어장치로 에어 나이프(11)의 거리 및 공기 압력을 변화시켜 철판(1)이 폭방향 및 길이방향으로 균일하게 도금될 수 있도록 한다.According to the present invention, as shown in FIG. 2, the plate thickness meter 5 and the plate thickness meter 6 after plating are respectively installed on the inlet and the outlet side of the plating bath 9 of the continuous plating factory. The result of the analysis by the control calculator 14, which is received, changes the distance and air pressure of the air knife 11 by the controller of the motor 12 via the PLC 13 so that the iron plate 1 is in the width direction and the longitudinal direction. To be uniformly plated.

종래의 기술에서와는 달리 본 발명에서는 도금층의 두께를 형광 X-ray의 검출에 의한 방식으로 측정하지 않고, 도금욕(9)의 전,후에 각각의 판 두께 측정기인 레이저 거리센서가 설치된 도금 전 판 두께 측정기(5)와 도금 후 판 두께 측정기(6)를 설치하여 도금 후의 전체 판의 두께에서 도금 전의 철판(1)만의 두께를 빼줌으로써 도금층의 두께를 정확하게 측정하고자 함에 특징이 있는 것이다.Unlike the prior art, in the present invention, the thickness of the plated layer is not measured by the method by the detection of the fluorescent X-ray, and the thickness of the plated plate before and after the plating bath 9 is provided with a laser distance sensor which is a plate thickness meter. It is characterized in that the thickness of the plated layer is accurately measured by installing the measuring device 5 and the plate thickness measuring device 6 after plating to subtract the thickness of the iron plate 1 before plating from the thickness of the entire plate after plating.

철판(1)의 폭방향 두께 측정방법으로 통상의 x-ray는 도금판 전체의 두께 측정시에 성분에 따른 투과율이 서로 다르므로 사용할 수 없기 때문에 비접촉식 센서를 이용할 수 밖에 없고, 본 발명에서는 레이저 거리센서를 이용하여 도금판의 폭방향으로 이동하면서 연속적인 판 두께를 측정하도록 하였다.As a method of measuring the thickness in the width direction of the iron plate 1, the conventional x-ray cannot be used because the transmittances of the components are different at the time of measuring the thickness of the entire plate, and thus a non-contact sensor is inevitably used. The sensor was used to measure the continuous plate thickness while moving in the width direction of the plate.

제3도에 나타낸 바와 같이 상기 도금 전 판 두께 측정기(5)와 도금 후 판 두께 측정기(6)는 각각 진행되는 주행 판(15)의 상, 하부에 센서 1 이송 안내기(18)에 의해 이송되는 거리센서 1(18)과, 센서 2 이송 안내기(16)에 의해 이송되는 거리센서 2(19)로 구성하되, 상기 각각의 센서 1 이송 안내기(18)와 센서 2 이송 안내기(16)는 양측의 고정대(20)에 고정 설치한다.As shown in FIG. 3, the pre-plating plate thickness meter 5 and the post-plating plate thickness meter 6 are respectively transported by the sensor 1 feed guide 18 above and below the traveling plate 15. The distance sensor 1 (18) and the distance sensor 2 (19) conveyed by the sensor 2 conveying guide 16, each of the sensor 1 conveying guide 18 and the sensor 2 conveying guide (16) of both sides It is fixedly installed on the holder 20.

이때 주행 판(15)의 두께 측정에는 각각의 레이저 거리센서 1(18) 및 거리센서 2(19)를 폭방향으로 이송하는 이동장치에 의한 오차가 발생될 수 있기 때문에 제3도에 나타낸 바와 같이 상, 하부의 기준면간의 거리를 먼저 측정하여 이동에 따른 오차를 보정하여 정확한 두께가 얻어질 수 있도록 한다.In this case, the thickness of the traveling plate 15 may be caused by an error caused by a moving device that transfers each of the laser distance sensor 1 18 and the distance sensor 2 19 in the width direction, as shown in FIG. 3. The distance between the reference planes of the upper and lower parts is first measured to correct an error according to the movement so that an accurate thickness can be obtained.

즉, 오차의 보정방법은 다음과 같다.That is, the error correction method is as follows.

상기 (1)식을 적용하여 오차를 보정한 도금 전, 후의 도금강판의 두께 프로파일 측정결과를 제4도에 나타내었고, 이로부터 약 30㎛ 정도의 도금층으로 균일하게 도금된 것을 확인할 수 있었다.The thickness profile measurement results of the plated steel sheet before and after the plating by correcting the error by applying the above formula (1) are shown in FIG. 4, and it was confirmed that the plated layer was uniformly plated with a plating layer of about 30 μm.

또한, 정도를 검증하기 위하여 마이크로미터로 이 도금강판의 두께 분포를 측정한 결과 상기 결과와 일치하였다.In addition, the thickness distribution of this plated steel sheet was measured with a micrometer to verify the accuracy, and the results were in agreement with the above results.

이상과 같은 본 발명은 연속 도금 공장에서 폭방향의 도금 부착략을 측정하여 일부 과도금의 원인을 분석함으로써 균일한 도금 부착이 가능하게 하고, 또한 도금 부착략의 정밀한 측정결과로 도금판의 품질향상에 기여할 뿐만 아니라, 도금 공장에서 발생하는 빌드-업(도금 코일에서 폭방향으로 일부분이 볼록하게 나온것)에 의한 주문외 불량에 대한 정확한 원인을 분석하여 제품의 품질향상을 얻을 수 있는 효과가 있다.The present invention as described above enables the uniform plating adhesion by measuring the plating adhesion in the width direction in the continuous plating factory to analyze the cause of some over plating, and also improve the quality of the plate by precise measurement results of the plating deposition. In addition to contributing to the process, it is possible to obtain an improvement in product quality by analyzing the exact cause of out-of-order defects caused by build-ups (parts convex in the width direction of the plating coil) occurring in the plating factory. .

Claims (1)

연속도금공장의 도금욕의 입, 출측에 각각 폭방향으로 이송되는 두 개의 거리센서가 설치된 도금 전 판 두께 측정기와 도금 후 판 두께 측정기를 설치하여 도금 전, 후의 판 두께를 각각 폭방향으로 연속적으로 측정하고, 상기 각각의 측정값으로부터 도금층의 두께를 구하고, 상기 도금층의 두께에 따라 에어 나이프의 작동을 조절하되, 상기 도금 전 두께 측정기와 도금 후 두께 측정기의 폭방향으로의 이송에 따른 오차를 보정함으로써 도금강판의 폭 방향 및 길이 방향으로의 균일한 도금을 얻을 수 있도록 함을 특징으로 하는 도금강판의 폭방향 도금부착량 측정방법.The plate thickness meter before and after plating and the plate thickness meter installed after the plating are installed in the width direction at the entrance and exit of the plating bath in the continuous plating factory. Measure the thickness of the plated layer from the respective measured values, and adjust the operation of the air knife according to the thickness of the plated layer, and correct the error due to the transfer in the width direction of the thickness gauge before plating and the thickness gauge after plating. The method of measuring the coating thickness in the width direction of the plated steel sheet, thereby obtaining uniform plating in the width direction and the length direction of the plated steel sheet.
KR1019940035175A 1994-12-19 1994-12-19 Measruing method for width directing plating quantum of plate sheet KR0147784B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358008B1 (en) * 1998-12-18 2002-12-18 주식회사 포스코 Edge build-up failure detection device and method for hot-dip galvanized steel sheet
KR100495978B1 (en) * 2000-12-06 2005-06-17 주식회사 포스코 Apparatus to prevent defect of strip surface
KR101320312B1 (en) * 2011-12-09 2013-10-22 주식회사 포스코 System for measuring thickness of steel plate using plc with digital signal process functionality

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358008B1 (en) * 1998-12-18 2002-12-18 주식회사 포스코 Edge build-up failure detection device and method for hot-dip galvanized steel sheet
KR100495978B1 (en) * 2000-12-06 2005-06-17 주식회사 포스코 Apparatus to prevent defect of strip surface
KR101320312B1 (en) * 2011-12-09 2013-10-22 주식회사 포스코 System for measuring thickness of steel plate using plc with digital signal process functionality

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KR960024269A (en) 1996-07-20

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