KR950016908A - How to determine the polishing amount of the roll for cold rolling mill - Google Patents

How to determine the polishing amount of the roll for cold rolling mill Download PDF

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Publication number
KR950016908A
KR950016908A KR1019930029955A KR930029955A KR950016908A KR 950016908 A KR950016908 A KR 950016908A KR 1019930029955 A KR1019930029955 A KR 1019930029955A KR 930029955 A KR930029955 A KR 930029955A KR 950016908 A KR950016908 A KR 950016908A
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KR
South Korea
Prior art keywords
roll
average
cold rolling
polishing amount
rolling
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Application number
KR1019930029955A
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Korean (ko)
Other versions
KR950012386B1 (en
Inventor
손붕호
이영호
Original Assignee
조말수
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019930029955A priority Critical patent/KR950012386B1/en
Publication of KR950016908A publication Critical patent/KR950016908A/en
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Publication of KR950012386B1 publication Critical patent/KR950012386B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/12—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

본 발명은 박판의 금속재료를 냉간압연하는 설비에 사용되는 작업롤, 중간롤 및 보강롤의 냉간압연기용 롤의 연마량을 결정하는 방법에 관한 것으로서, 조업실적 데이타를 통해 얻어진 정보를 근거로 롤의 종류나 사용위치의 차이에 관계없이 적정 연마량을 결정할 수 있는 법을 제공하여 과다연마의 방지에 따른 롤단위절감, 연마량 산정에 대한 시간 및 경비절감을 도모함은 물론 신뢰성 높은 냉간압연기용 롤의 연마량을 결정하는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for determining the polishing amount of a work roll, an intermediate roll, and a roll for cold rolling of a reinforcing roll used in a facility for cold rolling a thin metal material, and based on information obtained through operational data. Provides a method to determine the proper grinding amount regardless of the type or the location of use, to reduce roll unit and prevent time and cost for calculating the grinding amount, and to ensure reliable cold rolling rolls. It is an object of the present invention to provide a method for determining the polishing amount of.

본 발명은 단독 또는 다수개의 스탠드를 갖는 냉간압연기용 롤의 연마량을 설정하는 방법에 있어서, 실조업 데이타로부터 각각 스탠드의 각롤별로 평균롤단위를 작성하고 이를 통해 해당롤의 적정연마량을 결정하는 방법을 그 요지로 한다.The present invention relates to a method for setting the polishing amount of a roll for a cold rolling mill having a single stand or a plurality of stands, wherein the average roll unit is prepared for each roll of the stand from the actual production data, and the appropriate grinding amount of the roll is determined. That's the point.

Description

냉간압연기용 롤의 연마량 결정방법How to determine the polishing amount of the roll for cold rolling mill

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

제1도 : 작업순서의 변경이 피로손상에 미치는 영향도,1: Effect of change in working order on fatigue damage,

제2도 : 적정연마량 결정도,2: Determination degree of proper grinding amount,

제3도 : 조업실적 데이타로부터 작성한 #1스탠드 중간롤의 평균압연량에 포함되어 있는 변수들 중에서 접촉압력에 영향을 미치는 변수들의 구성비를 나타내는 구성도,3 is a block diagram showing the composition ratio of variables affecting the contact pressure among the variables included in the average rolling amount of the # 1 stand intermediate roll prepared from the performance data,

제4도 : 현연마기준에 의한 누적 피로 손상의 변화도.4: The change of cumulative fatigue damage according to the polishing standard.

Claims (2)

단독 또는 다수개의 스탠드를 갖는 냉간압연기용 롤의 연마량을 결정하는 방법에 있어서, 실조업 데이타로부터 각각 스탠드의 각롤별로, 압연된 소재의 중량에 기초한 평균롤 단위 및 이 평균롤 단위를 구성하는 변수인 평균소재폭, 평균입측소재두께, 평균출측소재두께 및 강종을 구하고; 상기와 같이 구한 변수들을 통상의 압연하중 계산수식(2a)(Hill근사식)에 대입하여 압연하중을 구하고;In the method for determining the polishing amount of a roll for a cold rolling mill having a single stand or a plurality of stands, the average roll unit based on the weight of the rolled material and the variables constituting the average roll unit for each roll of the stand from the actual production data, respectively The average material width, average measured material thickness, average measured material thickness, and steel grade; Rolling variables are obtained by substituting the variables obtained as described above into a general rolling load calculation formula (2a) (Hill approximation); (여기서, P: 압연하중, b: 소재폭, k: 입출측 장력에 따른 보정항, K: 소재의 변형저항(강종), Dp: 마찰계수 보정항, R′: Roll의 편평반경, h1,h2: 입, 출측 소재두께) 상기와 같이 구한 압연하중을 통상의 방법으로 최대접촉압력(Pmax)으로 환산하고 ; 상기와 같이 환산된 최대접촉압력(Pmax)을 하기식(2)에 대입하여Where P is the rolling load, b is the width of the material, k is the correction term depending on the tension on the entry side, K is the deformation resistance of the material (steel type), Dp is the friction coefficient correction term, and R 'is the flat radius of the roll, h 1 , h 2 : material thickness of the inlet and outlet side) The rolling load obtained as described above is converted into the maximum contact pressure Pmax in a conventional manner; Substituting the maximum contact pressure (Pmax) converted as described above in the following formula (2) (여기서, z: 하나의 롤단위를 구성하는 품종의 수, L: 신품 롤에서부터의 연마횟수, △R: 한번의 연신작업으로 줄어드는 반경의 변화량, j: 연마횟수, ni: 하나의 품종에서 압연된 롤의 회전수, x: 롤의 표면에서 중심으로의 거리, C1α: 각롤의 재질에 따른 고유정수, Pmax: Hertz 이론에 의한 접촉면상의 최대접촉압력, b: 두롤사이의 접촉폭의 반값) 피로손상분포 [F(i,x,m)] 값이 0.75－0.8에 이를때의 1회 연마량(△R)을 구하는 것을 특징으로 하는 냉간압연기용 롤의 연마량 결정방법.(Where z is the number of varieties constituting one roll unit, L is the number of grindings from a new roll, ΔR is the change in radius reduced by one drawing operation, j is the number of grindings, and ni is rolling in one variety. Number of rolls rotated, x: distance from roll surface to center, C 1 α: high constant according to the material of each roll, Pmax: maximum contact pressure on the contact surface according to Hertz's theory, b: half of contact width between two rolls ) Fatigue damage distribution [F (i, x, m)] A method for determining the polishing amount of a roll for a cold rolling mill, characterized by obtaining a one-time polishing amount (ΔR) when the value reaches 0.75-0.8. 제1항에 있어서, 평균롤 단위의 중량을 하기 식(7)에 의해The weight of an average roll unit is represented by following formula (7). (여기서, K2: 보정상수, L: 롤단위의 총 출측압연길이, W: 롤단위의 압연량, Rm: 롤단위의 평균압하율, Hm: 롤단위를 구성하는 입측소재의 평균두께, Wm: 롤단위를 구성하는 소재의 평균폭, r: 소재의 비중량) 출측압연길이로 환산하고 이를 이용하는 것을 특징으로 하는 냉간압연기용 롤의 연마량 결정방법.(Where K 2 : correction constant, L: total rolled length in roll units, W: roll amount in roll units, Rm: average rolling reduction in roll units, Hm: average thickness of lateral materials constituting roll units, Wm: average width of the material constituting the roll unit, r: specific weight of the material) A method for determining the polishing amount of a roll for a cold rolling mill, characterized in that it is converted to the exit rolling length and used. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029955A 1993-12-27 1993-12-27 Polish volume decision method of roll to cold rolling mill KR950012386B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930029955A KR950012386B1 (en) 1993-12-27 1993-12-27 Polish volume decision method of roll to cold rolling mill

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Application Number Priority Date Filing Date Title
KR1019930029955A KR950012386B1 (en) 1993-12-27 1993-12-27 Polish volume decision method of roll to cold rolling mill

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KR950016908A true KR950016908A (en) 1995-07-20
KR950012386B1 KR950012386B1 (en) 1995-10-17

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