KR970033164A - Cooling method of hot rolled roll with improved cooling capacity - Google Patents

Cooling method of hot rolled roll with improved cooling capacity Download PDF

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Publication number
KR970033164A
KR970033164A KR1019950066208A KR19950066208A KR970033164A KR 970033164 A KR970033164 A KR 970033164A KR 1019950066208 A KR1019950066208 A KR 1019950066208A KR 19950066208 A KR19950066208 A KR 19950066208A KR 970033164 A KR970033164 A KR 970033164A
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KR
South Korea
Prior art keywords
cooling
flow rate
cooling capacity
roll
capacity
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KR1019950066208A
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Korean (ko)
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KR100213331B1 (en
Inventor
이필종
박종일
이동은
김용권
Original Assignee
김종진
포항종합제철주식회사
신창식
재단법인 산업과학기술연구소
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Application filed by 김종진, 포항종합제철주식회사, 신창식, 재단법인 산업과학기술연구소 filed Critical 김종진
Priority to KR1019950066208A priority Critical patent/KR100213331B1/en
Publication of KR970033164A publication Critical patent/KR970033164A/en
Application granted granted Critical
Publication of KR100213331B1 publication Critical patent/KR100213331B1/en

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Classifications

    • 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
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • 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
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

본 발명은 연간압연롤을 냉각장치로 냉각수를 분사하여 냉각시키는 방법에 관한 것으로써, 냉각장치에서 분사되는 냉각수의 유량을 제어하여 열간압연롤을 냉각하므로써, 별도의 설비신설없이 냉각능을 향상시킬 수 있는 열간압연롤 냉각방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for cooling an annual rolling roll by spraying cooling water to a cooling device, and controlling the flow rate of the cooling water sprayed from the cooling device to cool the hot rolling roll, thereby improving cooling performance without additional facility installation. It is an object of the present invention to provide a hot rolling roll cooling method.

본 발명은 냉각장치로 냉각수를 분사하여 열간압연롤을 냉각하는 방법에 있어서, 20kg/㎠ 이하의 분사압력 범위에서 분사압력을 일정하게 유지하고 유량을 변화시키면서 냉각수를 분사하여 냉각능을 측정하고, 이를 이용하여 각 분사압력에 대한 유량과 냉각능과의 상관관계를 구하는 단계: 냉각전의 압연롤 온도와 냉각롤의 목표압연롤온도와의 온도차이를 구하는 단계; 상기 온도차이에 해당되는 냉각능을 구하는 단계; 상기와 같이 구한 냉각능을 상기 유량과 냉각능과의 상관관계에 대입하여 유량을 구하는 단계; 및 상기와 같이 구한 유량으로 냉각수를 분사하는 단계를 포함하여 구성되는 냉각능을 향상시킨 열간압연롤의 냉각방법을 그 요지로 한다.The present invention is a method for cooling the hot rolled roll by spraying the cooling water with a cooling device, the cooling pressure is measured by maintaining the spray pressure constant in the spray pressure range of 20kg / ㎠ or less and varying the flow rate to measure the cooling capacity, Calculating a correlation between the flow rate and the cooling capacity for each injection pressure using the same: obtaining a temperature difference between the rolling roll temperature before cooling and the target rolling roll temperature of the cooling roll; Obtaining a cooling capacity corresponding to the temperature difference; Calculating the flow rate by substituting the cooling capacity obtained as described above into a correlation between the flow rate and the cooling capacity; And a method of cooling the hot rolled roll having improved cooling ability, including the step of spraying the cooling water at the flow rate obtained as described above.

Description

냉각능을 향상시킨 열간압연롤의 냉각방법Cooling method of hot rolled roll with improved cooling capacity

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 열간압연에서 사용되는 대표적인 분사 노즐을 이용한 압연롤 냉각시 분사 압력과 냉각능의 관계도.1 is a relationship between the injection pressure and the cooling capacity when rolling roll cooling using a typical injection nozzle used in hot rolling.

제2도는 열간압연에서 사용되는 대표적인 분사 노즐을 이용한 압연롤 냉각시 분사 유량과 냉각능의 관계도.2 is a relationship between the spray flow rate and the cooling capacity during rolling roll cooling using a typical spray nozzle used in hot rolling.

제3도는 열간압연에서 사용되는 대표적인 분사 노즐을 이용한 압연롤 냉각시 분사 압력과 유량의 관계도.3 is a relationship between injection pressure and flow rate during rolling roll cooling using a typical injection nozzle used in hot rolling.

제4도는 열간압연에서 사용되는 대표적인 분사 노즐을 이용한 압연롤 냉각시 냉각능과 롤온도와의 관계도.4 is a relationship between the cooling capacity and the roll temperature during rolling roll cooling using a typical spray nozzle used in hot rolling.

제5도는 본 발명과 종래방법에 따라 롤냉각시 시간에 따른 롤 표면 온도변화를 나타내는 그래프.5 is a graph showing the change in the roll surface temperature with time during roll cooling in accordance with the present invention and the conventional method.

Claims (2)

냉각장치로 냉각수를 분사하여 열간압연롤을 냉각하는 방법에 있어서, 20kg/㎠ 이하의 분사압력 범위에서 분사압력을 일정하게 유지하고 유량을 변화시키면서 냉각수를 분사하여 냉각능을 측정하고, 이를 이용하여 각 분사압력에 대한 유량과 냉각능과의 상관관계를 구하는 단계; 냉각전의 압연롤 온도와 냉각롤의 목표압연롤 온도와의 온도차이를 구하는 단계; 상기 온도차이에 해당되는 냉각능을 구하는 단계; 상기와 같이 구한 냉각능을 상기 유량과 냉각능과의 상관관계에 대입하여 유량을 구하는 단계; 및 상기와 같이 구한 유량으로 냉각수를 분사하는 단계를 포함하여 구성되는 냉각능을 향상시킨 열간압연롤의 냉각방법.In the method for cooling the hot rolled roll by spraying the cooling water with a cooling device, the cooling capacity is measured by maintaining the spray pressure at a spray pressure range of 20 kg / cm 2 or less and spraying the coolant while changing the flow rate. Obtaining a correlation between the flow rate and the cooling capacity for each injection pressure; Obtaining a temperature difference between the rolling roll temperature before cooling and the target rolling roll temperature of the cooling roll; Obtaining a cooling capacity corresponding to the temperature difference; Calculating the flow rate by substituting the cooling capacity obtained as described above into a correlation between the flow rate and the cooling capacity; And spraying cooling water at a flow rate obtained as described above. 제1항에 있어서, 분사압력이 20kg/㎠ 일때의 유량(Q)과 냉각능(Htr)과의 상관관계가 하기 식(1)과 같이The correlation between the flow rate (Q) and the cooling capacity (H tr ) when the injection pressure is 20 kg / cm 2 is expressed by the following equation (1). Htr= 3.628+0.1364×Q .............(1)H tr = 3.628 + 0.1364 × Q ............. (1) 표시되는 것을 특징으로 하는 냉각능을 향상시킨 열간압연롤의 냉각방법.Cooling method of the hot rolled roll with improved cooling capacity characterized in that the display. ※ 참고사항: 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the original application.
KR1019950066208A 1995-12-29 1995-12-29 Cooling method of hot working roll by adjusting the flow rate of cooling water and ejecting pressure KR100213331B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950066208A KR100213331B1 (en) 1995-12-29 1995-12-29 Cooling method of hot working roll by adjusting the flow rate of cooling water and ejecting pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950066208A KR100213331B1 (en) 1995-12-29 1995-12-29 Cooling method of hot working roll by adjusting the flow rate of cooling water and ejecting pressure

Publications (2)

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KR970033164A true KR970033164A (en) 1997-07-22
KR100213331B1 KR100213331B1 (en) 1999-08-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100423924B1 (en) * 1999-12-23 2004-03-22 주식회사 포스코 Method for controlling amount of cooling water in hot rolling roll

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101259266B1 (en) 2010-12-01 2013-05-07 주식회사 포스코 Accelerated cooling apparatus and flow control method of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100423924B1 (en) * 1999-12-23 2004-03-22 주식회사 포스코 Method for controlling amount of cooling water in hot rolling roll

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