CN103949476B - A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting - Google Patents
A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting Download PDFInfo
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- CN103949476B CN103949476B CN201410166383.XA CN201410166383A CN103949476B CN 103949476 B CN103949476 B CN 103949476B CN 201410166383 A CN201410166383 A CN 201410166383A CN 103949476 B CN103949476 B CN 103949476B
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Abstract
A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, belongs to roll service procedure technical field, backing roll stock removal during for being keeped in repair by computing formula prediction roll.Its technical scheme is: the present invention adopts backing roll stock removal predictor formula, the constant corresponding to the frame of backing roll to be ground and roll material and coefficient is substituted in the formula calculating backing roll stock removal, can draw the stock removal needed for this backing roll.The shortcoming that the method for grinding that the present invention adopts when can overcome current maintenance support roller exists, realize the reasonable stock removal predicting backing roll to be repaired quickly and accurately, reach maintenance process fast, object accurately and efficiently, after adopting the method, backing roll consumption had obvious change, decreased average about 0.03kg/t.The invention solves the hard nut to crack of restriction backing roll maintenance, not only ensure that milling train is produced, also greatly reduce maintenance time and expense, decrease production cost.
Description
Technical field
Determine the method for backing roll stock removal when the present invention relates to a kind of roll maintenance in rolling mill for hot rolled planks and strips, belong to roll service procedure technical field.
Background technology
The four-high mill of rolling mill for hot rolled planks and strips is made up of upper and lower two working rolls and backing roll.Each backing roll all needs grinding after being on active service, and its free-revving engine removes the work hardening layer that roll surface produces due to long-term Structure deformation, but backing roll want actually grinding how much not only safe but also economy be the problem that technical staff pays close attention to always.At present, backing roll method for grinding is roughly divided into following two kinds: one is hardness measurement method.The method is that qualified hardness when entering factory with reference to roll product is carried out according to measuring, namely after each backing roll grinding in grinding process certain unit millimeter (1 millimeter or 0.5 millimeter), hardness measurement is carried out to roll surface, until its recover or be less than 3HSD(Shore hardness) enter factory's hardness after can be qualified; Two is experience filings.Machine roll surface situation under roll work range estimation backing roll, provides an estimation stock removal according to backing roll use experience in the past, or the in addition auxiliary confirmation such as eddy current, ultrasonic wave, and the method is not generally with reference to roll hardness change.For above two kinds of methods, the work on the spot experience that experience filing needs roll instrument standby long-term abundant and Non-Destructive Testing technical ability, and comparatively abstractly not easily to grasp.Though hardness measurement method comparatively the former more science, directly perceived, but operation is numerous and diverse, backing roll is made to need constantly to repeat for 24 hours the operation of " grinding 1 millimeter → stopping grinding → hardness determination → hardness exceed standard → dosage grinding 1 millimeter " when grinding, until hardness is qualified, circulating in when often propping up backing roll processing so usually needs to carry out 4,5 times more than, more than 12 hours during grinding, very easily affect milling train and normally produce.In addition, the backing roll hardness criterion of acceptability in the past followed " after backing roll mill roll surface hardness will close to or within not entering factory hardness 3HSD higher than it ", certain difference is had to cause the more obvious backing roll of work hardening phenomenon for some in material, producer, this standard is too conservative, makes roll cause unnecessary waste.
Except above-mentioned two kinds of methods, better do not determine the method for backing roll stock removal up to now, backing roll grinding is made to become the hard nut to crack of restriction backing roll maintenance, be not resolved for a long time, not only greatly have impact on milling train and produce, also increase maintenance time and expense, improve production cost, therefore be necessary to develop a kind of backing roll stock removal fast prediction method, fast and effeciently to carry out grinding to backing roll, ensure carrying out smoothly of production.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, the shortcoming that the method for grinding that this Forecasting Methodology adopts when can overcome current maintenance support roller exists, realize predicting quickly and accurately the reasonable stock removal of backing roll to be repaired, reach maintenance process fast, object accurately and efficiently.
The technical scheme solved the problems of the technologies described above is:
A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, it adopts following steps to carry out:
(1) calculate backing roll stock removal and adopt following formula:
M=C+K1 × backing roll diameter+K2 × rolling tonnage+K3 × rolling milimeter number
In formula:
The stock removal of M---backing roll, unit: millimeter;
C---constant;
K1, K2, K3---coefficient;
Backing roll diameter units: millimeter; Rolling tonnage unit: ten thousand tons; Rolling milimeter number unit: km;
(2) for the backing roll of different frame, unlike material, constant C and COEFFICIENT K 1, K2, K3 select different numerical value;
(3) the constant C corresponding to the frame of the backing roll of lower machine of being on active service and backing roll material and COEFFICIENT K 1, K2, K3 are substituted in the formula calculating backing roll stock removal, the stock removal needed for this backing roll can be drawn.
Above-mentioned rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, the constant C of the backing roll of different frame, unlike material and COEFFICIENT K 1, K2, K3 are following numerical value:
(1) finishing stand, cast steel backing roll: C=0.0969, K1=-0.000288, K2=0.0905, K3=0.000623;
(2) finishing stand, forged steel backup roll: C=0.202, K1=-0.000401, K2=0.0784, K3=0.000551;
(3) pony roughing mill, cast steel backing roll: C=-0.352, K1=0, K2=0.0308, K3=0.00251;
(4) pony roughing mill, forged steel backup roll: C=-0.497, K1=0, K2=0.0266, K3=0.00257.
The invention has the beneficial effects as follows:
The present invention adopts backing roll stock removal predictor formula, the constant corresponding to the frame of backing roll to be ground and backing roll material and coefficient is substituted in the formula calculating backing roll stock removal, can draw the stock removal needed for this backing roll.The shortcoming that the method for grinding that the present invention adopts when can overcome current maintenance support roller exists, realize the reasonable stock removal predicting backing roll to be repaired quickly and accurately, reach maintenance process fast, object accurately and efficiently, after adopting the method, under identical rolling condition, backing roll consumption has had obvious change, comparatively improves front decreased average about 0.03kg/t.The invention solves the hard nut to crack of restriction backing roll maintenance, not only ensure that milling train is produced, also greatly reduce maintenance time and expense, decrease production cost.
Detailed description of the invention
The present invention is a kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, and it adopts stock removal computing formula to carry out.This formula is by the data of the aspects such as a large amount of backing roll use of collection in worksite, grinding, Non-Destructive Testing detection, set up finite element equation, solve linear equations according to the change condition of work hardening layer, finally draw the key factor and linear equation that affect backing roll stock removal (i.e. roll surface work hardening layer) size.
Calculate backing roll stock removal and adopt following formula:
M=C+K1 × backing roll diameter+K2 × rolling tonnage+K3 × rolling milimeter number
In formula: M---the stock removal of backing roll, unit: millimeter; C---constant; K1, K2, K3---coefficient;
Backing roll diameter units: millimeter; Rolling tonnage unit: ten thousand tons; Rolling milimeter number unit: km;
For the backing roll of different frame, unlike material, constant C and COEFFICIENT K 1, K2, K3 select different numerical value, and the constant C of the backing roll of different frame, unlike material and COEFFICIENT K 1, K2, K3 are following numerical value:
(1) finishing stand, cast steel backing roll: C=0.0969, K1=-0.000288, K2=0.0905, K3=0.000623;
(2) finishing stand, forged steel backup roll: C=0.202, K1=-0.000401, K2=0.0784, K3=0.000551;
(3) pony roughing mill, cast steel backing roll: C=-0.352, K1=0, K2=0.0308, K3=0.00251;
(4) pony roughing mill, forged steel backup roll: C=-0.497, K1=0, K2=0.0266, K3=0.00257;
Constant C corresponding to the frame of the backing roll of lower machine of being on active service and backing roll material and COEFFICIENT K 1, K2, K3 are substituted in the formula calculating backing roll stock removal, the stock removal needed for this backing roll can be drawn.
One embodiment of the present of invention are as follows:
2401# backing roll normally descends machine one day, and frame is finish rolling, and material is forged steel, and backing roll diameter is 1536 millimeters, and amount of rolling is 32.635 ten thousand tons, and milimeter number is 1068 kms.
Use backing roll stock removal fast prediction method, the constant C corresponding to 2401# backing roll and COEFFICIENT K 1, K2, K3 are substituted in stock removal predictor formula, both:
Stock removal=0.202-0.000401 × 1536+0.0784 × 32.635+0.000551 × 1068
≈ 2.7 millimeters
Notice grinding machine work, 2401# stock removal is 2.7 millimeters, and machine can be descended after mill to detect without the need to stopping bed.
The Contrast on effect of the present embodiment and conventional method:
One, implementation process contrast
1, according to traditional roll surface hardness determination method, every grinding 1 millimeter, need stop a hardness determination; When after grinding 3 millimeters, backing roll hardness, higher than entering factory about hardness 5HSD, needs dosage grinding 1 millimeter; Measure when stopping bed after backing roll grinding 4 millimeters, now roll surface hardness is higher than entering factory about hardness 3HSD, reaches lower machine standard, can grinding second backing roll.
Known, in 2401# grinding process, stop bed altogether and detect 4 times, hardness determination is defective restarts grinding machine backing roll 3 times, hardness determination 4 times, and stock removal amounts to about 4 millimeters, is about 8 hours when machine grinding.
If 2 use backing roll stock removal fast prediction method, then after 2401# grinding 2.7 millimeters, namely inscribe machine, be about 4 hours when machine grinding.
Two, backing roll consumption contrast
After adopting the method, under identical rolling condition, backing roll consumption has had obvious change, comparatively improves front decreased average about 0.03kg/t.
In sum, the present invention utilize backing roll stock removal fast prediction technology achieve backing roll be on active service at every turn after the object of grinding as required, have the remarkable advantages such as safe and reliable, flexible, simple to operate, the grinding for rolling mill for hot rolled planks and strips backing roll provides a kind of comparatively unique technology.
Claims (2)
1. a rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting, is characterized in that: it adopts following steps to carry out:
(1) calculate backing roll stock removal and adopt following formula:
M=C+K1 × backing roll diameter+K2 × rolling tonnage+K3 × rolling milimeter number
In formula:
The stock removal of M---backing roll, unit: millimeter;
C---constant;
K1, K2, K3---coefficient;
Backing roll diameter units: millimeter; Rolling tonnage unit: ten thousand tons; Rolling milimeter number unit: km;
(2) for the backing roll of different frame, unlike material, constant C and COEFFICIENT K 1, K2, K3 select different numerical value;
(3) the constant C corresponding to the frame of the backing roll of lower machine of being on active service and backing roll material and COEFFICIENT K 1, K2, K3 are substituted in the formula calculating backing roll stock removal, the stock removal needed for this backing roll can be drawn.
2. rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting according to claim 1, is characterized in that: the constant C of the backing roll of different frame, unlike material and COEFFICIENT K 1, K2, K3 are following numerical value:
(1) finishing stand, cast steel backing roll: C=0.0969, K1=-0.000288, K2=0.0905, K3=0.000623;
(2) finishing stand, forged steel backup roll: C=0.202, K1=-0.000401, K2=0.0784, K3=0.000551;
(3) pony roughing mill, cast steel backing roll: C=-0.352, K1=0, K2=0.0308, K3=0.00251;
(4) pony roughing mill, forged steel backup roll: C=-0.497, K1=0, K2=0.0266, K3=0.00257.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166383.XA CN103949476B (en) | 2014-04-24 | 2014-04-24 | A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410166383.XA CN103949476B (en) | 2014-04-24 | 2014-04-24 | A kind of rolling mill for hot rolled planks and strips backing roll stock removal method for quick predicting |
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| CN103949476A CN103949476A (en) | 2014-07-30 |
| CN103949476B true CN103949476B (en) | 2016-01-06 |
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| CN114178319A (en) * | 2021-11-17 | 2022-03-15 | 首钢智新迁安电磁材料有限公司 | Control method and device of rolling equipment and computer equipment |
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| JP2003311592A (en) * | 2002-04-24 | 2003-11-05 | Nippon Steel Corp | Method for grinding roll based on preliminary measurement of grinding quantity |
| FI117248B (en) * | 2005-02-02 | 2006-08-15 | Metso Paper Inc | Bending roller with composite sheath |
| DE102007024810A1 (en) * | 2007-05-26 | 2008-11-27 | Voith Patent Gmbh | grinding system |
| RU2492948C1 (en) * | 2012-08-09 | 2013-09-20 | Александр Иванович Трайно | Method of operating sheet-rolling mill rolls |
| CN103084940B (en) * | 2013-01-23 | 2015-02-04 | 本钢板材股份有限公司 | Method of grinding plate rolling roller through grinding machine |
| CN103231289B (en) * | 2013-05-21 | 2015-10-07 | 唐山瑞丰钢铁（集团）有限公司 | Control the method for grinding of different roll surface roughness |
| CN103341798A (en) * | 2013-07-05 | 2013-10-09 | 山西太钢不锈钢股份有限公司 | Roller grinding method |
| CN103551385B (en) * | 2013-11-12 | 2016-03-02 | 山东众冠钢板有限公司 | A kind of method improving for six roller reversible cold-rolling mill service lifes |
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