KR100635072B1 - Simulator of Preventing End Mark in Cold Milled Steel - Google Patents

Simulator of Preventing End Mark in Cold Milled Steel Download PDF

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KR100635072B1
KR100635072B1 KR1019990057123A KR19990057123A KR100635072B1 KR 100635072 B1 KR100635072 B1 KR 100635072B1 KR 1019990057123 A KR1019990057123 A KR 1019990057123A KR 19990057123 A KR19990057123 A KR 19990057123A KR 100635072 B1 KR100635072 B1 KR 100635072B1
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South Korea
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sleeve
position sensor
strip
sleeve groove
winding
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KR1019990057123A
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Korean (ko)
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KR20010055813A (en
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안지훈
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주식회사 포스코
재단법인 포항산업과학연구원
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    • 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
    • B21C47/28—Drums or other coil-holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • 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
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • 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
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product

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

Abstract

본 발명은 냉연제품의 생산시 스트립(strip) 선단부의 두께단차에 의하여 발생되는 제품결함인 엔드마크의 발생을 방지하는 장치에 관한 것으로서, 냉연강판 권취슬리브(3)에 슬리브홈(16)을 형성하고 슬리브홈(16)에 슬리브홈 위치센서(17)를 설치함과 더불어 권취슬리브(3)의 축에 원점 위치센서(18)를 설치하고, 스트립지지대(24) 상에 위치센서(22),(23)를 설치함과 더불어 권취슬리브 지지대(13)에다슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)를 설치하며, 상기 슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)와 서보모터(11)를 PLC(12 )에 연결한 구성으로 스트립의 선단부를 가공함이 없이도 냉연제품의 엔드마크 발생을 방지할 수 있고, 권취불량도 발생하지 않아 제품의 표면품질을 향상시킬 수 있는 장점이 있는 것이다.      The present invention relates to a device for preventing the occurrence of the end mark, which is a product defect caused by the thickness step of the strip tip in the production of cold-rolled products, forming a sleeve groove (16) in the cold-rolled steel winding sleeve (3) In addition, the sleeve groove position sensor 17 is installed in the sleeve groove 16, and the home position sensor 18 is installed on the shaft of the winding sleeve 3, and the position sensor 22 on the strip support 24 is provided. In addition to the installation (23) and the sleeve sleeve support 13 is installed in the sleeve groove position sensor detection unit 15 and the home position sensor detection unit 14, the sleeve groove position sensor detection unit 15 and the home position The sensor detection unit 14 and the servomotor 11 connected to the PLC 12 can prevent the end-mark generation of cold-rolled products without processing the leading end of the strip, and the winding failure does not occur. There is an advantage to improve the surface quality.

냉연제품, 스트립, 두께단차, 엔드마크.Cold rolled product, strip, thickness step, end mark.

Description

냉연제품 엔드마크 발생방지 장치{Simulator of Preventing End Mark in Cold Milled Steel}Cold Rolled Products End Mark Prevention Device {Simulator of Preventing End Mark in Cold Milled Steel}

도 1은 냉연강판의 엔드마크 발생원인을 보여주는 모식도,      Figure 1 is a schematic diagram showing the cause of the end mark of the cold rolled steel,

도 2는 종래 냉연제품 엔드마크 발생방지 방법을 설명하기 위한 도면,      Figure 2 is a view for explaining a conventional cold rolled product endmark generation prevention method,

도 3은 본 발명 냉연제품 엔드마크 발생방지 장치의 구성도이다.      Figure 3 is a block diagram of a cold rolled product end mark generation prevention device of the present invention.

〈도면의 주요부분에 대한 부호의 설명〉     <Explanation of symbols for main parts of drawing>

1 : 스트립 2 : 엔드마크      1 strip 2 end mark

3 : 권취슬리브 4 : 스트립 선단부      3: winding sleeve 4: strip end

5 : 단차제거 11 : 서보모터      5: Step removal 11: Servo motor

12 : PLC 13 : 권취슬리브 지지대      12: PLC 13: winding sleeve support

14 : 원점 위치센서 감지부 15 : 슬리브홈 위치센서 감지부      14: home position sensor detection unit 15: sleeve groove position sensor detection unit

16 : 슬리브홈 17 : 슬리브홈 위치센서      16: sleeve groove 17: sleeve groove position sensor

18 : 원점 위치센서 19 : 권취슬리브 익스팬더      18: Home position sensor 19: Winding sleeve expander

20 : 절대원점 21 : 스트립 선단부      20: absolute origin 21: strip end

22, 23 : 위치센서 24 : 스트립지지대      22, 23: position sensor 24: strip support

본 발명은 냉연제품의 생산시 스트립(strip) 선단부의 두께단차에 의하여 발생되는 제품결함인 엔드마크의 발생을 방지하는 장치에 관한 것이다.      The present invention relates to an apparatus for preventing the generation of an end mark, which is a product defect caused by a thickness step of a strip tip part in the production of a cold rolled product.

일반적으로 냉연제품과 같이 강판의 표면자체가 외장재로 쓰이는 경우 강판표면의 미려함이 강판의 특성중에서 매우 중요한 요인이 된다. 도 1과 같이 냉연제품의 최종권취시 스트립(1) 선단부의 두께단차에 의하여 다음번에 감기는 강판에 표면결함(2 ; 엔드마크)이 발생하게 되며, 계속하여 이 굴곡마크가 다음번 권취되는 강판에 전사되어 나타난다. 이러한 엔드마크(2)의 발생을 억제하기 위하여 도 2와 같이 스트립 선단부(4)를 경사지게 가공하여 권취하였을 경우 다소간 엔드마크( End Mark)의 발생을 방지하는 효과는 있었으나 온라인(On-line) 상에서 스트립(1)의 가공이 용이하지 않다고 하는 문제점이 있으며, 또한 권취슬리브(3)의 재질을 현재보다 소프트한 재질로 바꾸어 스트립 선단부(4)가 다음 권취되는 강판의 압하에 의하여 소프트한 권취슬리브(3)안으로 파고 들어가 엔드마크(End Mark)의 발생을 방지하는 방안도 제시되어 있으나 소프트한 재질의 권취슬리브(3) 사용시 권취불량인 텔레스코프(telescope) 또는 강판에 불균일한 장력으로 인한 웨이브(wave) 등이 발생하는 문제점이 있었다.      In general, when the surface itself of the steel sheet is used as an exterior material like a cold rolled product, the beauty of the surface of the steel sheet is a very important factor among the characteristics of the steel sheet. When the final winding of the cold-rolled product as shown in Figure 1, the surface defects (2; end mark) is generated on the steel sheet to be wound next time by the thickness step of the end of the strip (1), and the bending mark is subsequently wound on the steel sheet It appears to be transferred. In order to suppress the occurrence of the end mark 2, as shown in FIG. 2, when the strip end portion 4 is wound in an inclined manner, there is an effect of preventing the occurrence of the end mark, but on-line. There is a problem that the processing of the strip 1 is not easy, and furthermore, the material of the winding sleeve 3 is changed to a softer material than the present one, so that the winding edge of the steel sheet to which the strip tip 4 is wound next is soft ( 3) A method of preventing the occurrence of an end mark by digging into is also suggested, but a wave caused by uneven tension in a telescope or steel sheet, which is a winding failure when using a soft winding sleeve 3 There was a problem that occurs.

본 발명은 상기한 실정을 감안하여 종래 냉연강판의 권취시에 야기되는 엔드마크의 발생문제를 해결하고자 발명한 것으로서 권취슬리브에 홈을 형성하고, 이홈에 스트립의 선단부가 정확하게 위치하도록 하여 스트립(strip) 선단부의 두께단차 에 의하여 발생되는 제품결함인 엔드마크의 발생을 방지하는 냉연제품 엔드마크 발생방지 장치를 제공함에 그 목적이 있다.      The present invention was invented to solve the problem of occurrence of end marks caused by the winding of a conventional cold rolled steel sheet in view of the above-described situation, and formed a groove in the winding sleeve, and the strip so that the tip of the strip is accurately positioned in the groove. It is an object of the present invention to provide a cold rolled product end mark prevention device for preventing the occurrence of end marks, which are product defects caused by the thickness difference of the tip.

상기한 목적을 달성하기 위한 본발명 냉연제품 엔드마크 발생방지 장치는 냉연강판 권취슬리브(3)에 슬리브홈(16)을 형성하고 슬리브홈(16)에 슬리브홈 위치센서(17)를 설치함과 더불어 권취슬리브(3)의 축에 원점 위치센서(18)를 설치하고, 스트립지지대(24) 상에 위치센서(22),(23)를 설치함과 더불어 권취슬리브 지지대( 13)에다 슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)를 설치하며, 상기 슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)와 서보모터 (11)를 PLC(12)에 연결하여 구성된 것을 특징으로 한다.      In order to achieve the above object, the present invention provides a cold-rolled product end mark preventing device for forming a sleeve groove 16 in a cold rolled steel coil winding sleeve 3 and installing a sleeve groove position sensor 17 in the sleeve groove 16. In addition, the home position sensor 18 is installed on the shaft of the winding sleeve 3, and the position sensors 22, 23 are installed on the strip support 24, and the sleeve groove position is placed on the winding sleeve support 13. The sensor detecting unit 15 and the home position sensor detecting unit 14 are installed, and the sleeve groove position sensor detecting unit 15, the home position sensor detecting unit 14, and the servomotor 11 are connected to the PLC 12. Characterized in that configured to connect.

이하 첨부도면을 참조하여 본 발명 냉연제품 엔드마크 발생방지 장치의 작용을 상세하게 설명한다.      Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the cold-rolled end products of the present invention prevention device.

도 3은 본 발명 냉연제품 엔드마크 발생방지 장치의 구성도로서, 권취슬리브 (3)의 구동회전수를 정확히 콘트롤할 수 있는 서보모터(11)를 사용하며, 스트립 선단부(21)가 함몰할 슬리브홈(16)의 위치를 정확히 파악할 수 있도록 슬리브홈 위치센서(17)를 부착한 뒤 강판인 스트립(1)이 이송되는 속도를 측정하여 항상 스트립 선단부(21)와 권취슬리브(3)가 만나는 부분에 권취슬리브(3)의 슬리브홈 (16)이 위치하도록 권취슬리브(3)의 회전수를 정밀 조절하여 냉연강판 스트립 선단부(21)가 위치할시 다음 강판의 압하에 의하여 스트립 선단부(21)가 슬리브홈 (16)에 함몰하여 스트립 선단부(21)의 두께단차로 인한 엔드마크 발생을 방지하게 된다.      3 is a configuration diagram of the cold-rolled product end mark prevention device of the present invention, which uses a servo motor 11 that can accurately control the driving speed of the winding sleeve 3, and a sleeve groove in which the strip tip portion 21 is to be recessed. After attaching the sleeve groove position sensor 17 so that the position of the 16 can be accurately measured, the speed at which the strip 1, which is a steel sheet, is transferred, is always measured, and a portion where the strip tip 21 and the winding sleeve 3 meet each other. When the cold rolled steel strip strip tip 21 is positioned by precisely adjusting the rotation speed of the coiling sleeve 3 so that the sleeve groove 16 of the coiling sleeve 3 is positioned, the strip tip 21 is sleeved by the reduction of the next steel sheet. Recessed in the groove 16 to prevent the end mark generation due to the thickness difference of the strip tip portion (21).

권취슬리브 익스팬더(19;expander)가 부착된 구동장치로는 구동회전수를 정확히 콘트롤할 수 있는 서보모터(11)를 사용하며, 권취슬리브(3)의 축에 원점 위치센서(18)을 부착한다. 권취슬리브(3)는 냉연강판 스트립 선단부(21)가 위치할시 다음 강판의 압하에 의하여 스트립 선단부(21)가 함몰할 수 있도록 인위적인 슬리브홈(16)을 파놓으며 그 위치를 표시하는 슬리브홈 위치센서(17)를 부착한다. 이렇게 센서가 구성될 경우 원점 위치센서(18)와 슬리브홈 위치센서(17)가 이루는 각도 θ1(radian)은 권취슬리브 익스팬더(19)가 권취슬리브(3)에 끼워지는 위치에 따라 다르나 상기 권취슬리브(3)가 일정속도로 회전할시 원점 위치센서(18)와 슬리브홈 위치센서(17)의 감지시간차 T1(sec)에 의하여 슬리브홈(16)의 위치가 원점 위치센서(18)를 기준으로 하기 수학식 1과 같이 결정된다.      As a drive device to which the winding sleeve expander 19 is attached, a servo motor 11 capable of precisely controlling the driving speed is used, and an origin position sensor 18 is attached to the shaft of the winding sleeve 3. The winding sleeve 3 is a sleeve groove position that displays the position of the artificial sleeve groove 16 by digging an artificial sleeve groove 16 so that when the cold rolled sheet strip tip portion 21 is positioned, the strip tip portion 21 can be recessed by the next reduction of the steel sheet. Attach the sensor 17. When the sensor is configured as described above, the angle θ1 (radian) formed between the origin position sensor 18 and the sleeve groove position sensor 17 varies depending on the position where the winding sleeve expander 19 is fitted to the winding sleeve 3. When (3) rotates at a constant speed, the position of the sleeve groove 16 is based on the home position sensor 18 by the detection time difference T1 (sec) between the home position sensor 18 and the sleeve groove position sensor 17. It is determined as in Equation 1 below.

θ1 = T1 ×RPM ×2π/ 60            θ1 = T1 × RPM × 2π / 60

한편으로 강판의 이송속도는 위치센서(22),(23) 등을 이용하여 스트립 선단부(21)를 위치센서(23),(22) 순으로 감지하여 각 센서(23),(22) 사이의 감지시간차 T2를 알고 위치센서(22),(23) 사이의 상대거리 S1(mm)를 알면 강판의 이송속도 V(mm/sec)는 하기 수학식 2로 결정된다.      On the other hand, the feed rate of the steel sheet detects the strip end portion 21 in the order of the position sensors 23, 22 by using the position sensors 22, 23, and the like. Knowing the detection time difference T2 and knowing the relative distance S1 (mm) between the position sensors 22 and 23, the feed rate V (mm / sec) of the steel sheet is determined by the following equation (2).

V = S1 / T2            V = S1 / T2

이와 같이 권취슬리브(3)의 슬리브홈(16) 위치와 스트립(1)의 이송속도를 알고 위치센서(22)로부터 스트립 선단부(21)가 권취슬리브(3)와 만나는 위치 A까지의 거리를 S2라 하였을 경우 스트립(1)의 이송속도 V로부터 A위치에 도달하는데 소요되는 시간 T3는 하기 수학식 3으로 결정된다.      In this way, the position of the sleeve groove 16 of the take-up sleeve 3 and the feeding speed of the strip 1 are known, and the distance from the position sensor 22 to the position A where the strip tip portion 21 meets the take-up sleeve 3 is S2. In this case, the time T3 required to reach the position A from the feed rate V of the strip 1 is determined by the following equation (3).

T3 = S2 / V           T3 = S2 / V

이때 슬리브홈(16)과 절대원점(20)이 이루는 각도가 θ2라고 하면 T3의 시간동안 권취슬리브(3)의 슬리브홈(16)이 회전해야 할 각도는 θ1 + θ이며, 이때 요구되는 회전수는 하기 수학식 4에 의하여 결정된다.      If the angle between the sleeve groove 16 and the absolute origin 20 is θ2, the angle at which the sleeve groove 16 of the winding sleeve 3 should rotate for the time T3 is θ1 + θ, and the required number of rotations Is determined by the following equation (4).

RPM = 60 ×( θ1 + θ) / (T3 ×2π)            RPM = 60 × (θ1 + θ) / (T3 × 2π)

본 발명은 권취슬리브(3)에 냉연강판 스트립 선단부(21)가 위치할시 다음강판의 압하에 의하여 스트립 선단부(21)가 함몰할 수 있도록 권취슬리브(3)에 인위적인 슬리브홈(16)을 파놓고, 한편으로 회전수의 조절이 정확하며 용이한 서보모터 (11)를 권취슬리브(3)에 설치함과 더불어 권취슬리브(3)의 슬리브홈(16) 위치를 정확히 파악할 수 있도록 슬리브홈(16)에 슬리브홈 위치센서(17)를 설치하며, 또한 강판의 이송속도를 측정할 수 있는 위치센서(22),(23) 등을 스트립지지대(24)에 설치하여 강판의 이송속도를 측정한다. 이때 상기 수학식 1을 이용하여 권취슬리브( 3)의 슬리브홈(16) 위치를 파악하고 권취슬리브(3)의 슬리브홈(16) 위치 및 스트립 (1)의 속도는 PC와 연결 또는 PLC(12) 등을 사용하여 저장한다. 상기 수학식 2 및 수학식 3을 이용 스트립(1)의 이송속도 및 스트립 선단부(21)가 권취슬리브(3)와 만나는 위치 A까지 스트립(1)이 이동하는데 소요되는 시간을 결정하고, PC와 연결 또는 PLC(12) 등을 사용하여 저장한다. 상기 수학식 1~3의 결과로부터 수학식 4에 의해 서보모터(11)의 RPM을 결정하고 이를 다시 PC 또는 PLC(12) 제어를 통하여 서보모터(11)에 명령을 내려 스트립 선단부(21)가 권취슬리브(3)의 슬리브홈(16) 위치에 오도록 서보모터(11)의 회전을 제어하여 권취슬리브(3)의 회전을 제어하게 된다.      According to the present invention, when the cold rolled steel strip front end portion 21 is positioned on the winding sleeve 3, the sleeve sleeve 16 is artificially dug into the winding sleeve 3 so that the strip front end portion 21 can be recessed by pressing down the next steel sheet. On the other hand, the sleeve groove (16) to install the servo motor (11) in the winding sleeve (3), which is easy to adjust the number of revolutions and to easily determine the position of the sleeve groove (16) of the winding sleeve (3). ), The sleeve groove position sensor 17 is installed, and position sensors 22, 23, etc., which can measure the feed rate of the steel sheet, are installed on the strip support 24 to measure the feed rate of the steel sheet. At this time, the position of the sleeve groove 16 of the take-up sleeve 3 by using the equation (1) and the position of the sleeve groove 16 of the take-up sleeve 3 and the speed of the strip (1) is connected to the PC or PLC (12) ) To save. Using the equations (2) and (3), the feed speed of the strip 1 and the time taken for the strip 1 to move to the position A where the strip tip 21 meets the take-up sleeve 3 are determined. Connect or save using PLC 12, etc. The RPM of the servo motor 11 is determined by the equation 4 from the results of Equations 1 to 3, and the command is again given to the servo motor 11 through the control of the PC or the PLC 12 to give the strip tip 21 a. The rotation of the take-up sleeve 3 is controlled by controlling the rotation of the servomotor 11 to be at the sleeve groove 16 position of the take-up sleeve 3.

상기한 바와 같이 작용하는 본 발명 냉연제품 엔드마크 발생방지 장치는 스트립의 선단부를 가공함이 없이도 냉연제품의 엔드마크 발생을 방지할 수 있고, 권취불량도 발생하지 않아 제품의 표면품질을 향상시킬 수 있는 장점이 있다.










The cold rolled product end mark preventing device of the present invention, which acts as described above, can prevent the end mark of the cold rolled product without processing the leading end of the strip, and can not improve the surface quality of the product due to the winding failure. There is an advantage.










Claims (1)

냉연강판 권취슬리브(3)에 슬리브홈(16)을 형성하고 슬리브홈(16)에 슬리브홈 위치센서(17)를 설치함과 더불어 권취슬리브(3)의 축에 원점 위치센서(18)를 설치하고, 스트립지지대(24) 상에 위치센서(22),(23)를 설치함과 더불어 권취슬리브 지지대(13)에다 슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)를 설치하며, 상기 슬리브홈 위치센서 감지부(15) 및 원점 위치센서 감지부(14)와 서보모터(11)를 PLC(12)에 연결하여 구성된 것을 특징으로 하는 냉연제품 엔드마크 발생방지 장치. The sleeve groove 16 is formed in the cold rolled steel coil winding sleeve 3, the sleeve groove position sensor 17 is installed in the sleeve groove 16, and the home position sensor 18 is installed in the shaft of the winding sleeve 3. In addition, the position sensors 22 and 23 are installed on the strip support 24, and the sleeve groove position sensor detection unit 15 and the origin position sensor detection unit 14 are installed in the winding sleeve support 13. And the sleeve groove position sensor detecting unit (15), the home position sensor detecting unit (14), and the servo motor (11) are connected to the PLC (12).
KR1019990057123A 1999-12-13 1999-12-13 Simulator of Preventing End Mark in Cold Milled Steel KR100635072B1 (en)

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KR100798099B1 (en) * 2001-08-23 2008-01-28 주식회사 포스코 Apparatus and method for coiling cold rolling strip
KR100838842B1 (en) * 2001-12-24 2008-06-17 주식회사 포스코 Control method for preventing center mark in skin pass mill of continuous annealing line
KR101309350B1 (en) * 2011-11-16 2013-09-17 주식회사 포스코아이씨티 Apparatus and Method for Winding Strip into Coil
KR101410096B1 (en) * 2012-09-18 2014-06-25 주식회사 포스코 System for preventing end-mark of coil
KR20160014468A (en) 2014-07-29 2016-02-11 포스코강판 주식회사 Pad for preventing end-mark

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Publication number Priority date Publication date Assignee Title
JPS6072612A (en) * 1983-09-27 1985-04-24 Mitsubishi Heavy Ind Ltd Detecting device of front tip of strip at down coiler
JPH02263515A (en) * 1989-04-04 1990-10-26 Sumitomo Metal Ind Ltd Method of coiling strip
KR960016510U (en) * 1994-11-08 1996-06-17 Strip tip processing equipment to prevent end marks
KR19990013683U (en) * 1997-09-29 1999-04-26 이구택 End Mark Remover of Cold Rolled Strip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6072612A (en) * 1983-09-27 1985-04-24 Mitsubishi Heavy Ind Ltd Detecting device of front tip of strip at down coiler
JPH02263515A (en) * 1989-04-04 1990-10-26 Sumitomo Metal Ind Ltd Method of coiling strip
KR960016510U (en) * 1994-11-08 1996-06-17 Strip tip processing equipment to prevent end marks
KR19990013683U (en) * 1997-09-29 1999-04-26 이구택 End Mark Remover of Cold Rolled Strip

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