CN102553944A - Calibration method for roller gaps of rolling machine - Google Patents

Calibration method for roller gaps of rolling machine Download PDF

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Publication number
CN102553944A
CN102553944A CN2012100384110A CN201210038411A CN102553944A CN 102553944 A CN102553944 A CN 102553944A CN 2012100384110 A CN2012100384110 A CN 2012100384110A CN 201210038411 A CN201210038411 A CN 201210038411A CN 102553944 A CN102553944 A CN 102553944A
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roll
milling train
gap
force
transmission
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CN2012100384110A
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Chinese (zh)
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CN102553944B (en
Inventor
陈�光
陈建宇
刘顺东
董占奎
张�杰
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首钢京唐钢铁联合有限责任公司
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Publication of CN102553944A publication Critical patent/CN102553944A/en
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Abstract

Disclosed is a calibration method for roller gaps of a rolling machine. The calibration method includes: resetting a magnetic scale and a press head of an AGC (automatic gauge control) of the rolling machine, leveling the roller gaps by pressure control, checking deviation of the roller gaps on the operating side and two driving sides of the rolling machine; stopping the rolling machine, closing the roller gaps, calibrating the rolling force of the rolling machine and resetting the roller gaps when the deviation of the operating side and the two driving sides of the rolling machine is normal; checking whether the sum of rolling force of the operating side and the driving sides of the rolling machine is smaller than the calibrated rolling force or not after the roller gaps are reset, checking whether the deviation of the rolling force of the operating side and the two driving sides of the rolling machine is normal or abnormal, leveling the roller gaps of the rolling machine again if the deviation of the rolling force is abnormal, then checking the deviation of the rolling force of the rolling machine again; resetting the roller gaps of the rolling machine and opening the same to the set value if the deviation of the rolling force is checked to be normal, thereby completing calibration. When in use of the calibration method for the roller gaps of the rolling machine, calibration time is saved, the accident lasting and equipment fault due to failure of calibration are reduced, and operation rate and precision in production are increased.

Description

The scaling method of mill roll-gap

Technical field

The present invention relates to the control technology field of metallurgy industry milling train, particularly a kind of scaling method of mill roll-gap.

Background technology

In metallurgy industry; SPHC generally all is made up of 6 or 7 finishing mills; Mm finishing mill unit is the equipment of most critical in the various control indexes of finished product; The temperature of finished product, key indexs such as thickness be all by finishing mill control, and controlling these indexs needs a large amount of parameter values like the tension force of the cooling water flow of every rolling mill, the speed of milling train, milling train, the roll-force of milling train etc.And these parameters all will be carried out roll gap calibration before Rolling Production, draw a basic value.Calibrated all data are issued the second control system of model control, and second control system is according to calibrated data, and different steel grades issues different set and is rolled, and guarantee end product quality.It is after first class control system receives new roll data, to carry out automatic roll gap calibration such as Fig. 1 that traditional milling train is demarcated, during to calculate the speed of milling train; Cooling water flow; The diameter of working roll, backing roll, parameters such as the roll-force of timing signal will calculate the Relative Zero roll gap at last.And traditional milling train is demarcated the requirement that mode can not adapt to all hot-rolled products, because last rolling mill adopts patterned roll, then common demarcation mode just can not meet the demands during like the production diamond plate.

Summary of the invention

The objective of the invention is, solve traditional demarcation mode and can not satisfy some product technological requirement, a kind of scaling method to the redundant mill roll-gap of last rolling mill is provided.

The scaling method of a kind of mill roll-gap provided by the invention comprises: behind the magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carry out the leveling of pressure control roll gap, the roll gap deviation of inspection milling train fore side and transmission side both sides;

When milling train fore side and transmission side both sides roll gap deviation just often, forbid changing trains or buses, close roll gap, demarcate mill rolling force, the roll gap zero clearing;

After the roll gap zero clearing; Whether the roll-force sum of inspection milling train fore side and transmission side is less than demarcating roll-force; Whether inspection milling train fore side and transmission side both sides roll-force deviation be normal, and when the roll-force deviation was undesired, milling train detected the roll-force deviation of milling train after the roll gap leveling once more again;

After the roll-force deviation that detects milling train is normal, mill roll-gap mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.

Further, behind the said magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carry out the leveling of pressure control roll gap, the roll gap deviation of inspection milling train fore side and transmission side both sides is:

Milling train begins to demarcate after receiving and demarcating order, and the rolling mill AGC hydraulic cylinder is opened soon, and the AGC hydraulic cylinder is with the magnetic scale zero clearing to demarcate;

After said magnetic scale zero clearing was demarcated and accomplished, milling train cut out roll gap to 10mm with the speed of 2mm/s, detected the pressure head zero clearing of mill rolling force and demarcated;

After said pressure head zero clearing is demarcated and is accomplished, the mill rolling force that the inspection pressure head detects, when the milling train fore side that detects and transmission side both sides roll-force sum during less than 500KN, milling train cuts out roll gap to 2mm;

When roll gap is closed to 2mm; Milling train carries out pressure control; Milling train begins to cut out roll gap, and the roll-force sum that makes milling train fore side and transmission side both sides is to 1960KN, and then the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When deviation during greater than 245KN, milling train begins to carry out the leveling of pressure control roll gap;

After the leveling of pressure control roll gap, fore side and transmission side both sides roll gap deviation that the inspection magnetic scale is measured.

Further, the fore side of measuring when magnetic scale is with transmission side both sides roll gap deviation during greater than 2mm, system alarm, and roll gap is opened to 5mm, and milling train is demarcated and is stopped, and when deviation during less than 2mm, system proceeds demarcation.

Further, said when milling train fore side and transmission side both sides roll gap deviation just often, forbid changing trains or buses, close roll gap, the demarcation mill rolling force, the roll gap zero clearing is:

When milling train fore side and transmission side both sides roll gap deviation during less than 2mm; Keep the working roll cooling water to close; Forbid changing trains or buses; Use then and carry out roll gap less than normal roll-force and press, press roll gap and make milling train fore side and transmission side both sides roll-force sum when roll gap is closed reach the roll-force 12500KN of demarcation, roll gap zero clearing.

Further; After the said roll gap zero clearing; Whether the roll-force sum of inspection milling train fore side and transmission side is less than demarcating roll-force; Whether inspection milling train fore side and transmission side both sides roll-force deviation be normal, and when the roll-force deviation was undesired, milling train detected the roll-force deviation of milling train after the roll gap leveling once more again and is:

After the roll gap zero clearing; The roll-force size of milling train fore side that the inspection pressure head detects and transmission side both sides, when both sides roll-force sum during less than 12500KN, the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When milling train fore side and transmission side both sides roll-force deviation during greater than 245KN; Carry out the leveling of pressure control roll gap, when the milling train fore side with transmission side both sides roll-force deviation during less than 245KN, system proceeds demarcation.

Further, said after detection roll-force deviation is normal, milling train mark zero, mill roll-gap is opened to setting value, demarcates completion to be:

When milling train fore side and transmission side both sides roll-force deviation during less than 245KN, milling train mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.

Further, the scaling method of described mill roll-gap also comprises:

After roll gap calibration is accomplished, demarcating the database that completion signal and nominal data are issued the second control system of model control.

Further, said nominal data comprises:

Demarcate roll-force, milling train fore side and transmission side both sides roll gap deviate and working roll related data.

The scaling method of a kind of mill roll-gap provided by the invention adopts behind the automatic static demarcating than manual demarcation mode when the rolling special steel grade in the past; Saved the nominal time, the roll gap calibration precision is seen more accurately and from the demarcation mode and is avoided because the different influences of changing trains or buses to cause device damage in up-down rollers footpath.Reduced to have improved production operational availability and performance accuracy because of demarcating time of casualty and the equipment fault that failure causes.

Description of drawings

Fig. 1 is the flow chart of a kind of scaling method of traditional mill roll-gap in the prior art;

Fig. 2 is the flow chart of the scaling method of a kind of mill roll-gap of providing of the embodiment of the invention.

The specific embodiment

In conjunction with Fig. 1, shown in Figure 2, the scaling method of a kind of mill roll-gap provided by the invention, this method is carried out through the first class control system that equipment such as PLC constitute, and comprises following step:

Step S1: behind the magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carry out the leveling of pressure control roll gap, the roll gap deviation of inspection milling train fore side and transmission side both sides.

Step S2: when the roll gap deviation of milling train fore side and transmission side both sides just often, the step that milling train is changed trains or buses with 30% speed among cancellation Fig. 1 forbids changing trains or buses, and closes roll gap, demarcates mill rolling force, the roll gap zero clearing.

Step S3: after the roll gap zero clearing; Whether the roll-force sum of inspection milling train fore side and transmission side is less than demarcating roll-force; Whether inspection milling train fore side and transmission side both sides roll-force deviation be normal; When the roll-force deviation was undesired, milling train detected the roll-force deviation of milling train after the roll gap leveling once more again.After the roll gap zero clearing; The roll-force size of milling train fore side that the inspection pressure head detects and transmission side both sides, when both sides roll-force sum during less than 12500KN, the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When milling train fore side and transmission side both sides roll-force deviation during greater than 245KN; Carry out the leveling of pressure control roll gap, when the milling train fore side with transmission side both sides roll-force deviation during less than 245KN, system proceeds demarcation.

Step S4: after the roll-force deviation that detects the milling train both sides is normal, the step that backing roll rotates a circle among cancellation Fig. 1, milling train mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.When the roll-force deviation of milling train both sides during less than 245KN, milling train mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.

Step S5: after the roll gap calibration completion, control the networking database of system for the secondary rolling model that constitutes by large server by first class control system transmission demarcation completion signal and nominal data that equipment such as PLC constitute.Nominal data comprises: demarcate roll-force, the roll gap deviation of milling train fore side and transmission side both sides and working roll related data etc.

Wherein, step S1: behind the magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carry out the leveling of pressure control roll gap, the roll gap deviation of inspection milling train fore side and transmission side both sides comprises:

Step S11: milling train begins to demarcate after receiving and demarcating order, and the rolling mill AGC hydraulic cylinder is opened soon, and the AGC hydraulic cylinder is with the magnetic scale zero clearing to demarcate.

Step S12: after said magnetic scale zero clearing was demarcated and accomplished, milling train cut out roll gap to 10mm with the speed of 2mm/s, detected the pressure head zero clearing of mill rolling force and demarcated.

Step S13: after said pressure head zero clearing is demarcated and is accomplished, the mill rolling force that the inspection pressure head detects, when the milling train fore side that detects and transmission side both sides roll-force sum during less than 500KN, milling train cuts out roll gap to 2mm.

Step S14: when roll gap is closed to 2mm; Milling train carries out pressure control; Milling train begins to cut out roll gap, and the roll-force sum that makes milling train fore side and transmission side both sides is to 1960KN, and then the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When deviation during greater than 245KN, milling train begins to carry out the leveling of pressure control roll gap.

Step S15: after the leveling of pressure control mill roll-gap, the fore side that the inspection magnetic scale is measured and the roll gap deviate of transmission side both sides.The fore side that detects when magnetic scale and the roll gap deviate of transmission side both sides be during greater than 2mm, system alarm, and roll gap is opened to 5mm, and milling train is demarcated and is stopped, and when deviate during less than 2mm, system proceeds demarcation.

Among the step S2, when milling train fore side and transmission side both sides roll gap deviation just often, forbid changing trains or buses, close roll gap, demarcate mill rolling force, the roll gap zero clearing specifically comprises:

When milling train fore side and transmission side both sides roll gap deviation during less than 2mm; Keep the working roll cooling water to close; Forbid changing trains or buses; Use then and carry out roll gap less than normal roll-force and press, press roll gap and make milling train fore side and transmission side both sides roll-force sum when roll gap is closed reach the roll-force 12500KN of demarcation, roll gap zero clearing.

Traditional demarcation mode just can not satisfy technological requirement when rolling special steel grade such as during the rolled diamond plate steel, and the static demarcating mode just can satisfy technological requirement.The scaling method of a kind of mill roll-gap provided by the invention adopts behind the automatic static demarcating than manual demarcation mode when the rolling special steel grade in the past; Saved the nominal time, the roll gap calibration precision is seen more accurately and from the demarcation mode and is avoided because the different influences of changing trains or buses to cause device damage in up-down rollers footpath.Reduced to have improved production operational availability and performance accuracy because of demarcating time of casualty and the equipment fault that failure causes.

The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (8)

1. the scaling method of a mill roll-gap is characterized in that, comprising:
Behind the magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carry out the leveling of pressure control roll gap, the roll gap deviation of inspection milling train fore side and transmission side both sides;
When milling train fore side and transmission side both sides roll gap deviation just often, forbid changing trains or buses, close roll gap, demarcate mill rolling force, the roll gap zero clearing;
After the roll gap zero clearing; Whether the roll-force sum of inspection milling train fore side and transmission side is less than demarcating roll-force; Whether inspection milling train fore side and transmission side both sides roll-force deviation be normal, and when the roll-force deviation was undesired, milling train detected the roll-force deviation of milling train after the roll gap leveling once more again;
After the roll-force deviation that detects milling train is normal, mill roll-gap mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.
2. the scaling method of mill roll-gap as claimed in claim 1 is characterized in that, behind the said magnetic scale and pressure head zero clearing with the rolling mill AGC hydraulic cylinder, carries out the leveling of pressure control roll gap, and the roll gap deviation of inspection milling train fore side and transmission side both sides is:
Milling train begins to demarcate after receiving and demarcating order, and the rolling mill AGC hydraulic cylinder is opened soon, and the AGC hydraulic cylinder is with the magnetic scale zero clearing to demarcate;
After said magnetic scale zero clearing was demarcated and accomplished, milling train cut out roll gap to 10mm with the speed of 2mm/s, detected the pressure head zero clearing of mill rolling force and demarcated;
After said pressure head zero clearing is demarcated and is accomplished, the mill rolling force that the inspection pressure head detects, when the milling train fore side that detects and transmission side both sides roll-force sum during less than 500KN, milling train cuts out roll gap to 2mm;
When roll gap is closed to 2mm; Milling train carries out pressure control; Milling train begins to cut out roll gap, and the roll-force sum that makes milling train fore side and transmission side both sides is to 1960KN, and then the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When deviation during greater than 245KN, milling train begins to carry out the leveling of pressure control roll gap;
After the leveling of pressure control roll gap, fore side and transmission side both sides roll gap deviation that the inspection magnetic scale is measured.
3. the scaling method of mill roll-gap as claimed in claim 2 is characterized in that:
The fore side of measuring when magnetic scale is with transmission side both sides roll gap deviation during greater than 2mm, system alarm, and roll gap is opened to 5mm, and milling train is demarcated and is stopped, and when deviation during less than 2mm, system proceeds demarcation.
4. the scaling method of mill roll-gap as claimed in claim 3 is characterized in that, said when milling train fore side and transmission side both sides roll gap deviation just often, forbid changing trains or buses, close roll gap, the demarcation mill rolling force, the roll gap zero clearing is:
When milling train fore side and transmission side both sides roll gap deviation during less than 2mm; Keep the working roll cooling water to close; Forbid changing trains or buses; Use then and carry out roll gap less than normal roll-force and press, press roll gap and make milling train fore side and transmission side both sides roll-force sum when roll gap is closed reach the roll-force 12500KN of demarcation, roll gap zero clearing.
5. the scaling method of mill roll-gap as claimed in claim 4; It is characterized in that; After the said roll gap zero clearing, whether the roll-force sum of inspection milling train fore side and transmission side is less than demarcating roll-force, and whether inspection milling train fore side and transmission side both sides roll-force deviation be normal; When the roll-force deviation was undesired, milling train detected the roll-force deviation of milling train after the roll gap leveling once more again and is:
After the roll gap zero clearing; The roll-force size of milling train fore side that the inspection pressure head detects and transmission side both sides, when both sides roll-force sum during less than 12500KN, the milling train fore side and the transmission side both sides roll-force deviation of the detection of inspection pressure head; When milling train fore side and transmission side both sides roll-force deviation during greater than 245KN; Carry out the leveling of pressure control roll gap, when the milling train fore side with transmission side both sides roll-force deviation during less than 245KN, system proceeds demarcation.
6. the scaling method of mill roll-gap as claimed in claim 5 is characterized in that, and is said after detection roll-force deviation is normal, milling train mark zero, and mill roll-gap is opened to setting value, demarcates completion to be:
When milling train fore side and transmission side both sides roll-force deviation during less than 245KN, milling train mark zero, mill roll-gap is opened to setting value, demarcates and accomplishes.
7. like the scaling method of each described mill roll-gap of claim 1-6, it is characterized in that, also comprise:
After roll gap calibration is accomplished, demarcating the database that completion signal and nominal data are issued the second control system of model control.
8. the scaling method of mill roll-gap as claimed in claim 7 is characterized in that, said nominal data comprises:
Demarcate roll-force, milling train fore side and transmission side both sides roll gap deviate and working roll related data.
CN201210038411.0A 2012-02-20 2012-02-20 Calibration method for roller gaps of rolling machine CN102553944B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464473A (en) * 2013-08-23 2013-12-25 安阳钢铁股份有限公司 Automatic adjustment method of finishing roll gap level
CN103949482A (en) * 2014-04-18 2014-07-30 南京梅山冶金发展有限公司 Roller balance control method of planisher
CN104624999A (en) * 2014-11-27 2015-05-20 中冶连铸技术工程有限责任公司 Roll gap calibration device and method for square billet tension leveler
CN106269904A (en) * 2015-05-27 2017-01-04 鞍钢股份有限公司 A kind of scaling method of mill roll-gap
CN107583961A (en) * 2017-10-16 2018-01-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN107671126A (en) * 2017-09-08 2018-02-09 张家港浦项不锈钢有限公司 The horizontal control method of the upper and lower working roll of steekle mill
CN108284136A (en) * 2018-01-19 2018-07-17 山东钢铁集团日照有限公司 A method of improving finishing mill roll gap stated accuracy
CN110064669A (en) * 2019-05-08 2019-07-30 北京科技大学设计研究院有限公司 A kind of quick acyclic homologically trioial method of no pressure detection instrument
CN110153202A (en) * 2019-06-21 2019-08-23 安阳钢铁股份有限公司 A kind of method that mill roll-gap automatic horizontal is adjusted
CN110153202B (en) * 2019-06-21 2020-09-11 安阳钢铁股份有限公司 Automatic horizontal adjustment method for roll gap of rolling mill

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CN101972779A (en) * 2010-11-05 2011-02-16 南京钢铁股份有限公司 Four-roller reversible mill zero position calibrating and roll gap positioning method
CN102039316A (en) * 2009-10-10 2011-05-04 北京理工大学 Zero-point calibration method for hot continuous rolling machine frame

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GB1452051A (en) * 1974-06-13 1976-10-06 Sendzimir Inc T Rolling of metal strips
CN1062483A (en) * 1991-12-21 1992-07-08 冶金工业部钢铁研究总院 The establishing method of Medium and Heavy Plate Rolling gap values between rollers
DE19511187A1 (en) * 1995-03-27 1996-10-02 Yuli Dipl Ing Liu Appts. for varying roller gap shape in strip rolling mill
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464473A (en) * 2013-08-23 2013-12-25 安阳钢铁股份有限公司 Automatic adjustment method of finishing roll gap level
CN103949482A (en) * 2014-04-18 2014-07-30 南京梅山冶金发展有限公司 Roller balance control method of planisher
CN104624999A (en) * 2014-11-27 2015-05-20 中冶连铸技术工程有限责任公司 Roll gap calibration device and method for square billet tension leveler
CN106269904A (en) * 2015-05-27 2017-01-04 鞍钢股份有限公司 A kind of scaling method of mill roll-gap
CN107671126A (en) * 2017-09-08 2018-02-09 张家港浦项不锈钢有限公司 The horizontal control method of the upper and lower working roll of steekle mill
CN107583961A (en) * 2017-10-16 2018-01-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN107583961B (en) * 2017-10-16 2018-11-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN108284136A (en) * 2018-01-19 2018-07-17 山东钢铁集团日照有限公司 A method of improving finishing mill roll gap stated accuracy
CN110064669A (en) * 2019-05-08 2019-07-30 北京科技大学设计研究院有限公司 A kind of quick acyclic homologically trioial method of no pressure detection instrument
CN110153202A (en) * 2019-06-21 2019-08-23 安阳钢铁股份有限公司 A kind of method that mill roll-gap automatic horizontal is adjusted
CN110153202B (en) * 2019-06-21 2020-09-11 安阳钢铁股份有限公司 Automatic horizontal adjustment method for roll gap of rolling mill

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