CN102233357A - Novel roller matching method - Google Patents
Novel roller matching method Download PDFInfo
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- CN102233357A CN102233357A CN201110064955XA CN201110064955A CN102233357A CN 102233357 A CN102233357 A CN 102233357A CN 201110064955X A CN201110064955X A CN 201110064955XA CN 201110064955 A CN201110064955 A CN 201110064955A CN 102233357 A CN102233357 A CN 102233357A
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Abstract
The invention discloses a novel roller matching method, and belongs to the technical field of rolling of metal working plate and strip products. In the method, reasonable roller convexity is determined according to the arrangement of a rolling production plan, and a proper roller is selected. Meanwhile, the invention also relates to a calculation method for determining a roller grinding plan according to the arrangement of a production plan. According to the method, the plate type quality precision of the products can be improved, the service life of a roller can be prolonged, and the economic benefit can be improved.
Description
Technical field
The invention belongs to metal processing strip product rolling technical field, relate to a kind of novel roll and join the roller method, especially determine rational roll crown, select suitable roll according to the layout of Rolling Production plan; Simultaneously, the invention still further relates to the computational methods that the roll dressing plan is determined in a kind of layout according to the production schedule.
Background technology
Roll is one of of paramount importance equipment of Rolling Production process.The roll of milling train comprises working roll and backing roll, and when Rolling Production, working roll and rolled piece are in contact with one another, and produces very big active force between the two, and the very big friction between the two causes working roll to produce bigger wearing and tearing; Simultaneously, also have very big frictional force between backing roll and the working roll, working roll and backing roll all can produce bigger wearing and tearing aborning like this.The wearing and tearing of roll directly have influence on the roll shape of roll, directly influence the quality of product.
Along with constantly carrying out of producing, the wearing and tearing of roll are increasing, especially to working roll, can not continue use again after the limit that reaches certain of wearing and tearing, otherwise will have a strong impact on the quality of product.At this moment, working roll and backing roll will carry out roll change, and working roll of changing and backing roll are wanted further grinding, and working roll and backing roll after the grinding just can reuse.
The wearing and tearing major influence factors of roll comprises the kind of rolled products, dimensions, and rolling scaduled layout, the temperature when rolling also comprises numerous factors such as iron scale for the hot-rolled product influence factor.Wherein, playing material factor is rolling kind, dimensions.Usually, when producing, the kind and the specification of Rolling Production are fixed, and conclusive effect is just played in the wearing and tearing of the layout breaker roll of the production schedule so.That is to say, produce the same kind and the product of dimensions, rolling scaduled layout difference, the wearing and tearing of roll are also inequality, thus roll to join roller also inequality.
The roller of joining of roll is exactly the contradictory problems that will solve roll wear and production schedule layout, determines rational roll dressing plan, and promptly roll crown and grinding curve obtain better product quality, especially improve the template quality of rolled piece.At present, to join roller be to formulate according to experience to the roll of domestic production factory basically.For the long manufacturing enterprise of some production times, accumulated certain knowhow, can join roller according to experience; To the enterprise of new operation, often need the process of groping of 1-2 year, during product quality have certain problem.External industrially developed country, because they have accumulated a lot of abundant knowhows and strict production system, joining the roller method generally is to formulate according to experience.
Summary of the invention
Technical problem to be solved by this invention is: proposed a kind of new method, set up roll and joined the model that roller (roll crown) is dynamically adjusted with production schedule change, do not need empirical data just can obtain accurate roll crown, select suitable roll to produce; Also can pass through this method, join the roller system according to set roll conversely and formulate the production schedule.
The convexity of roll determines to be subjected to the restriction of a lot of aspects, as the temperature of the layout of rolling kind, dimensions, the production schedule, production process, iron scale, cooling and numerous factors such as lubricated.The convexity of roll has determined sharing of load when rolling and the setting of bending roller force (if roller equipment is arranged), directly influences the template quality of product.At the set production schedule, select suitable roll crown that the quality of raising product and the stability of production are had important effect.For solving the problems of the technologies described above, the present invention adopts following technical scheme:
At first according to the production schedule, kind, specification and performance requirement according to the product of producing, determine the rolling procedure of production, determine general rolling force and total rolling mileage of milling train according to rolling procedure, obtain along the general rolling force on the roll width direction and total rolling mileage according to rolling dimensions, calculate then along the wearing and tearing of each point on the roll width direction.To there not being the milling train of roller equipment, can calculate the wear extent of roll when whole plans are rolling to be finished, initially join roll crown according to what roll was determined in the requirement of this wear extent and finished product, select suitable roll; To the milling train of roller equipment is arranged, the wear extent of roll can calculate the convex value of roll during according to the maximum of bending roller force and rolling finishing, thus obtain roll join the roll crown value, and then select suitable roll to carry out Rolling Production in this planning cycle.
Rolling procedure determine to be production control the time one of key technology.Rolling procedure will be determined according to kind, specification and the performance requirement produced.The main setting control project of rolling procedure comprises: draught pressure, and roll torque, intermesh determination, reduction settings etc. for the milling train that roller equipment is arranged, also need to set bending roller force.The total length that drafts and initial specification by each passage can calculate rolling strip material.The computational methods of rolling procedure can obtain according to the quadratic form planing method of simplifying, and also can obtain by other computational methods, even obtain by empirical method.
The wearing and tearing computational methods of roll are the processes of a more complicated.On the one hand, the wearing and tearing of roll and the material of roll have very big relation, and the wearing and tearing of roll and rolling kind, specification, plan layout on the other hand, the temperature when rolling, iron scale, rolling lubrication etc. are closely related.Wherein some factor is difficult to accurately measure, such as the influence of iron scale, rolling lubrication etc.Roll wear is concave curve along the width of the body of roll, i.e. different along its length some wear extent difference on roll barrel.The The Representation Equation of roll wear is as follows:
Wherein:
B: rolled piece width;
F: draught pressure;
L: rolling mileage.
At different manufacturing enterprises, can obtain the wear curve of roll according to the method for statistics, also can obtain the wear curve of roll according to the method for theory correction.
Much adopted hydraulic bending roll equipment on the modern milling train, this equipment causes flatness defect that the very big effect that remedies is arranged for improving roll wear.In the production, need set for roller equipment provides bending roller force, its computational methods are shown in (2):
In the formula (2):
K: coefficient, get 0.5;
P
Z: roll-force, units;
△ D
1: upper working rolls and lower working rolls convexity summation equals the original convexity of working roll
, hot convexity
, and wearing and tearing convexity
Algebraical sum:
△ D
2: backing roll convexity summation up and down equals the original convexity of backing roll
, hot convexity
, and wearing and tearing convexity
Algebraical sum:
In the Rolling Production process, the roll change cycle of backing roll is long; In a roll change cycle of working roll, the convexity of backing roll changes very little, generally be no more than 0.1mm, and change procedure is very slow; Therefore when considering that working roll is joined roller, can calculate according to the original convexity of backing roll.
Can calculate the actual original roll crown of working roll by (2), (3), (4):
(5)
Each coefficient can calculate by following formula in formula (2), (3), (4), (5):
In the above-mentioned formula:
B: rolled piece width, mm;
H: outlet thickness of strip, mm;
H: import thickness of strip, mm;
△ h: the absolute draft amount of band, mm;
L: working roll transition distance between center lines, mm;
L1: backing roll transition distance between center line, mm;
L2: backing roll roll neck distance between center line, mm;
L: roll barrel length, mm;
R: working roll radius, mm;
D
1, D
2: the barrel diameter of working roll, backing roll, mm;
l
c: the contact arc length after the consideration roll elastic flattening, mm;
E
1, E
2: the elastic modelling quantity of working roll, backing roll, kg/mm
2
G
1, G
2: the modulus of shearing of working roll, backing roll, kg/mm
2
v
1, v
2: the Poisson's ratio of working roll, backing roll material;
k
c: the cross sectional shape coefficient, get 1.11 for the circular section;
Q ': the draught pressure on the band unit width, kg/mm;
P
P: deformed area average unit pressure, kg/mm
2
k
L: force yield limit, kg;
o
Zd: by the resistance of deformation value that call function provides, kg.
In (5) formula, also need the thermal expansion of evaluation work roller.The thermal expansion of working roll is meant along with what produce constantly carries out the expansion that roll takes place because of being heated.Thermal expansion has special model to calculate, and adopts following formula to calculate the thermal expansion of rollers convex value in the application:
In the formula (6):
Y (t): roller heat convex degree learning dynamic value;
δ: rolling rhythm parameter, roll change cycle;
A, C: return calculating parameter;
T: time variable.
Usefulness of the present invention is: need not accumulate the long-term production data, just can utilize the roll roller is that parameter, roll-force mathematic(al) parameter and the production schedule calculate optimum join roller plan and roll dressing plan, improved the template quality precision of product, prolong the service life of roll, created considerable economic.
Description of drawings
Fig. 1 joins roller method system architecture schematic diagram for a kind of novel roll.
Fig. 2 is parameter declaration figure for the roll roller.
Fig. 3 is the roll dressing plan that calculates.
The specific embodiment
Describe Application Example of the present invention in detail below in conjunction with accompanying drawing.
Embodiment one
See also Fig. 1, the present invention forms schematic diagram in the system that certain steel mill's 4000mm milling train is applied to production control.Mainly comprise following a few part: roll-force mathematic(al) parameter, roll roller are that parameter, production schedule module, data-interface, rolling procedure computing module, general rolling force and rolling mileage computing module, broad ways general rolling force and rolling mileage computing module, roll wear computing module, thermal expansion of rollers computing module, intermediate parameters computing module, roll crown computing module, roll are joined roller plan, roll dressing plan etc.
The roller system of rolling mill parameter as shown in Figure 2.The size and the material of working roll roller system are fixed in this Thick Plate Plant.Backing roll generally is to change once in 4 weeks, and working roll is according to the work period, and change once every day.The initial convexity of backing roll is a fixed numbers, is 0.5mm.
According to the roll roller is parameter, the roll-force mathematic(al) parameter, production schedule module, the rolling procedure computing module calculates the rolling procedure table of each block plate, calculate total draught pressure and total rolling mileage then, afterwards according to this rolling scaduled width requirement, calculate the total draught pressure and the rolling mileage of width each point, according to these data, substitution roll wear computing module, obtain roll wear numerical value, then in conjunction with the intermediate parameters computing module, the thermal expansion of rollers computing module, obtain roll according to the new roll crown computational methods of roll crown and join roll crown, thereby what obtain roll joins the roller plan, and further generates the grinding plan of roll.
Fig. 3 is the corresponding roll dressing plan that calculates according to 3 production schedules.
Claims (11)
1. a novel roll is joined the roller method, determines to join roller plan and roll dressing plan according to the layout of the production schedule; It is characterized in that described method comprises that roll-force mathematic(al) parameter, roll roller are that parameter, production schedule module, data-interface, rolling procedure computing module, general rolling force and rolling mileage computing module, broad ways general rolling force and rolling mileage computing module, roll wear computing module, thermal expansion of rollers computing module, intermediate parameters computing module, roll crown computing module, roll are joined roller plan, roll dressing plan:
Described roll-force mathematic(al) parameter comprises the mechanics parameter of rolling necessity;
Described roll roller is size, the material information that parameter comprises roll roller system;
Described data-interface is used for obtaining calculating from the outside and joins roller plan and the required various data of roll dressing plan;
Described rolling procedure computing module is used to calculate the rolling procedure of monolithic slab;
Described general rolling force and rolling mileage computing module, according to the rolling procedure of monolithic slab, the general rolling force and the rolling mileage of the plan of statistics whole production;
Described broad ways general rolling force and rolling mileage computing module are according to the rolling procedure of monolithic slab, along the general rolling force and the rolling mileage of each point on the roll width directional statistics roll;
Described roll wear computing module according to broad ways general rolling force and rolling mileage, calculates the wear extent of each point on the roll;
Described thermal expansion of rollers computing module calculates formula according to thermal expansion, calculates roll in difference thermal expansion constantly;
Described intermediate parameters computing module is used to calculate various intermediate parameters;
Described roll crown computing module according to wearing and tearing, thermal expansion, the intermediate parameters of roll, calculates the convexity of roll;
Described roll is joined the roller plan, selects suitable roll according to the convexity of roll;
Described roll dressing plan according to the calculating convexity of joining selected roll of roller plan and roll, is formulated the grinding curve of roll.
2. roll according to claim 1 is joined the roller method, it is characterized in that: the roll-force mathematic(al) parameter is fixed for specific plant.
3. roll according to claim 1 is joined the roller method, it is characterized in that: the roll roller be parameter for specific roll, its roller diameter progressively reduces in process of production.
4. roll according to claim 1 is joined the roller method, it is characterized in that: the rolling procedure that the rules computing module calculates has adopted same algorithm with the rolling procedure that is used for actual production, has guaranteed the precision of roll-force and rolling mileage.
5. roll according to claim 1 is joined the roller method, it is characterized in that: the roll wear computing module has been taken all factors into consideration roll-force and the influence of rolling mileage to wearing and tearing, and has also considered the wide influence to wearing and tearing of different plates simultaneously.
6. roll according to claim 1 is joined the roller method, it is characterized in that: the thermal expansion of rollers computing module has considered that milling train roll when production occurs unusually and shuts down progressively cools off the influence to thermal expansion.
7. roll according to claim 1 is joined the roller method, it is characterized in that: the intermediate parameters computing module both can be used to comprise the milling train of roller equipment, also can be used for not comprising the milling train of roller equipment.
8. roll according to claim 1 is joined the roller method, it is characterized in that: the result of calculation of roll crown computing module is the convexity curve along the roll width direction.
9. roll according to claim 1 is joined the roller method, it is characterized in that: roll is joined roller in the works, can take all factors into consideration the service life and the convexity requirement of roll.
10. roll according to claim 1 is joined the roller method, it is characterized in that: roll dressing can be calculated the grinding curve according to the convexity of roll middle position in the works.
11. any described roll according to claim 1 to 10 is joined the roller method, it is characterized in that, comprises following steps:
Steps A:, determine that roll force mathematic(al) parameter and roll roller are parameter according to the equipment situation modeling of roll roller system;
Step B: according to the production schedule and roll force mathematic(al) parameter, roll roller is the rolling procedure of every block of slab of calculation of parameter;
Step C: according to the rolling procedure statistics general rolling force and the rolling mileage of every block of slab;
Step D: according to the width of every block of slab, the general rolling force and the rolling mileage of each point on the statistics roll broad ways;
Step e: the wear curve that calculates roll;
Step F:, calculate the thermal expansion of roll according to the production schedule;
Step G: according to roll force mathematic(al) parameter, roll roller is the parameter and the production schedule, calculates the intermediate parameters of roll;
Step H:, calculate the convexity curve of roll according to wearing and tearing, thermal expansion and the intermediate parameters of roll;
Step I: the roll suitable according to the convexity Curve selection of roll;
Step J: for the roll of choosing is formulated the grinding plan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110064955XA CN102233357A (en) | 2011-03-17 | 2011-03-17 | Novel roller matching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110064955XA CN102233357A (en) | 2011-03-17 | 2011-03-17 | Novel roller matching method |
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|---|---|
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671950A (en) * | 2012-05-09 | 2012-09-19 | 首钢总公司 | System and method for judging roll consumption of cold rolling working roll |
| CN106180201A (en) * | 2015-04-30 | 2016-12-07 | 宝钢特钢有限公司 | Roller method and system joined online by a kind of 20 roller sendzimir mill working rolls |
| CN106955891A (en) * | 2016-01-08 | 2017-07-18 | 宝山钢铁股份有限公司 | The working roll for being suitable for tandem mills matches somebody with somebody roller method |
| CN107321799A (en) * | 2017-07-06 | 2017-11-07 | 重集团大连工程技术有限公司 | A kind of parameter of new mill control technique formulates integrated system |
| CN113617853A (en) * | 2021-08-23 | 2021-11-09 | 包头常铝北方铝业有限责任公司 | Cold rolling method of aluminum alloy |
-
2011
- 2011-03-17 CN CN201110064955XA patent/CN102233357A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671950A (en) * | 2012-05-09 | 2012-09-19 | 首钢总公司 | System and method for judging roll consumption of cold rolling working roll |
| CN102671950B (en) * | 2012-05-09 | 2014-05-28 | 首钢总公司 | System and method for judging roll consumption of cold rolling working roll |
| CN106180201A (en) * | 2015-04-30 | 2016-12-07 | 宝钢特钢有限公司 | Roller method and system joined online by a kind of 20 roller sendzimir mill working rolls |
| CN106180201B (en) * | 2015-04-30 | 2017-11-28 | 宝钢特钢有限公司 | A kind of 20 roller sendzimir mill working rolls match somebody with somebody roller method and system online |
| CN106955891A (en) * | 2016-01-08 | 2017-07-18 | 宝山钢铁股份有限公司 | The working roll for being suitable for tandem mills matches somebody with somebody roller method |
| CN107321799A (en) * | 2017-07-06 | 2017-11-07 | 重集团大连工程技术有限公司 | A kind of parameter of new mill control technique formulates integrated system |
| CN107321799B (en) * | 2017-07-06 | 2020-06-12 | 一重集团大连工程技术有限公司 | Novel parameter setting integrated system for twenty-roller mill control process |
| CN113617853A (en) * | 2021-08-23 | 2021-11-09 | 包头常铝北方铝业有限责任公司 | Cold rolling method of aluminum alloy |
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Application publication date: 20111109 |