CN102581036A - Hot tandem mill zero-position adjusting method with rolling force protection effect - Google Patents

Hot tandem mill zero-position adjusting method with rolling force protection effect Download PDF

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Publication number
CN102581036A
CN102581036A CN2011100055833A CN201110005583A CN102581036A CN 102581036 A CN102581036 A CN 102581036A CN 2011100055833 A CN2011100055833 A CN 2011100055833A CN 201110005583 A CN201110005583 A CN 201110005583A CN 102581036 A CN102581036 A CN 102581036A
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roll
force
zero
bit
adjustment
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CN2011100055833A
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Chinese (zh)
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CN102581036B (en
Inventor
荣鸿伟
周兴泽
徐欣磊
谢捷
何晓明
孙业中
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宝山钢铁股份有限公司
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Abstract

The invention relates to the field of control of hot-rolled steel strip production, in particular to a hot tandem mill zero-position adjusting method with rolling force protection effect, which includes the following steps of firstly, starting the zero-position adjusting function, resetting the zero position by roll shifting, performing position control and then performing first-stage adjustment and second-stage adjustment by a pressing system; secondly, determining the subsequent step according to detection results of oil injection deviation, detecting the rolling force deviation of a rolling mill during running, confirming completion by operators, confirming the relation between roll gap and oil injection by a control system, detecting current oil injection position according to the zero-position rolling force, resetting the pressing system to complete zero-position adjustment; and thirdly, resetting the pressing system, sending a system alarm and interrupting the zero-position adjustment program when the operators confirm to abandon. The hot tandem mill zero-position adjusting method with the rolling force protection effect can effectively improve equipment safety in automatic zero-position adjusting process and has high popularization value.

Description

Continuous hot-rolling mill zero-bit method of adjustment with roll-force protection

Technical field

The present invention relates to hot-strip production control field, relate in particular to a kind of continuous hot-rolling mill zero-bit method of adjustment.

Background technology

Strip-mill strip is referred to as to depress the zero-bit adjustment in each process of changing definite zero roll gap position, roll (comprising working roll and backing roll) back.When its roll-force must reach the value of regulation in the zero-bit adjustment process, its zero roll gap position of depressing in the zero-bit adjustment can be found.Zero roll gap position is the basis of depressing setting, and the accuracy of depressing setting has directly determined the thickness and precision of hot-strip.(comprise working roll and backing roll) after all strip-mill strip roll changes and all will carry out zero-bit adjustment and zero-bit adjustment leveling.

Zero-bit is adjusted existing basic step:

The 1st step: frame two side cylinders depress to synchronously makes a concerted effort 300~500 tons, and its two sides roll-force deviation is to be converted into oil through the roll-force deviation to annotate and adopt after the deviation automatic locate mode to implement disposable oil to annotate action and regulate;

The 2nd step: milling train is changed trains or buses, and frame two side cylinders depress to synchronously and make a concerted effort 1000~1500 tons afterwards;

The 3rd step: accomplish the preservation of roll gap a reference value, upload a reference value simultaneously to host computer;

The 4th step: roll gap is opened 4~10 millimeters, adjusts frame two side roll gap (being the leveling amount) simultaneously;

The 5th step: the zero-bit adjustment finishes, and into steel is waited in finish rolling.

The problem that exists:

1, in the acyclic homologically trioial process when relating to Position Control its roll-force relatively large, simultaneously roll remains static, when it come to relevant its size of equipment makes a mistake, and will cause the damage of roll and relevant device.

2, the automation in the acyclic homologically trioial process, in case roll-force is unusual, personnel can't manual intervention, causes accident to enlarge.

Summary of the invention

Technical problem to be solved by this invention provides a kind of continuous hot-rolling mill zero-bit method of adjustment with roll-force protection; Through to relating to the control of continuous hot-rolling mill maximum rolling force when zero-bit is adjusted; Make the maximum rolling force of frame in carrying out the zero-bit adjustment process controlled, to avoid the excessive damage machinery equipment of roll-force in the adjustment process.

The present invention is achieved in that a kind of continuous hot-rolling mill zero-bit method of adjustment with roll-force protection, may further comprise the steps:

Step 1, the adjustment of startup zero-bit, the zero-bit position is replied in roll shifting, and roll gap is opened to maximum position, and sensor resets, initiation parameter i=0;

Step 2, in-position control, press down system is depressed into specified roll gap;

Step 3, the control of entering roll-force, the adjustment of one stage of press down system; After pressure head resetted, press down system provided specified roll-force T of a stage 1, write down a stage fore side roll-force With a stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, to satisfying condition a) simultaneously and b) or the c that satisfies condition simultaneously) and d):

A) both sides roll-force and

B) both sides roll-force poor

C) fore side roll-force

D) transmission side roll-force

Step 4, the adjustment of press down system two-stage, press down system provide zero-bit adjustment roll-force T 2, record two-stage fore side roll-force With two-stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, and do following selection:

1) as the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, get into step 5:

2) as the static leveling e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, system carries out leveling to be calculated, and opens roll gap then to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return step 3; As i>10 the time, roll gap is opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;

E) both sides roll-force and

F) both sides roll-force poor

G) fore side roll-force

H) transmission side roll-force

Step 5, inspection oil are annotated deviation, and press down system rises to behind the specified roll gap press down system and is depressed into specified roll-force T of a stage is provided 1, relatively the deviation of transmission side and fore side both sides oil notes when both sides oil is annotated deviation smaller or equal to 3mm, gets into step 6; When both sides oil was annotated deviation greater than 3mm, roll gap was opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;

The inspection of changing trains or buses of step 6, milling train, the milling train back system of changing trains or buses carries out speed inspection, when the milling train speed entering step 7 during to normal speed of changing trains or buses; When the milling train speed of changing trains or buses does not reach normal speed, return step 4;

Step 7, the roll-force deviation check when milling train is changed trains or buses, press down system are progressively from specified roll-force T of a stage 1Be pressurized to zero-bit adjustment roll-force T 2, press down in press down system and to be rolled the power deviation check in the process, the record fore side roll-force of changing trains or buses With the transmission side roll-force of changing trains or buses , and do following selection:

1) the both sides rolling force i that satisfies condition simultaneously) and the k that j) or simultaneously satisfies condition) and l) time, get into step 8;

2) the both sides roll-force e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, return step 5;

I) both sides roll-force and

J) both sides roll-force poor

K) fore side roll-force

L) transmission side roll-force

Step 8, press down system are depressed into zero-bit adjustment roll-force T 2After stop the action, write down final fore side roll-force With final transmission side roll-force , confirm by operating personnel; When operating personnel confirmed to accomplish, control system validation roll gap and the oily relation of annotating detected oil and gaze at the zero-bit position of front position as milling train, and press down system resets, zero-bit adjustment completion; When operating personnel confirmed to abandon, press down system resetted, and system reports to the police, zero-bit adjustment program interrupt.

Also comprise inspection roll shifting position in the said step 1, like roll shifting not in zero-bit, system alarm, zero-bit adjustment program stops.

Specified roll-force T of a described stage 1Be 300~500t, described zero-bit adjustment roll-force T 2Be 1000~1500t.

Described specified roll gap is 10mm.

The continuous hot-rolling mill zero-bit method of adjustment that the present invention has a roll-force protection is through to relating to the control of continuous hot-rolling mill maximum rolling force when zero-bit is adjusted; Position Control during promptly from compress control method in the control procedure of position and pressure control; The maximum rolling force of frame in carrying out the zero-bit adjustment process is controlled, to avoid the excessive damage machinery equipment of roll-force in the adjustment process; Along with improving constantly of hot rolling technology technology, increasingly high for the automaticity of the frame zero-bit adjustment that relates to, the popularization of present technique can effectively improve the device security in automatic zero-bit adjustment process, has promotional value more widely.

Description of drawings

Fig. 1 is the FB(flow block) of Position Control in the step of the present invention;

Fig. 2 is for relating to the FB(flow block) of judging roll-force control in the Position Control process among the present invention.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

A kind of continuous hot-rolling mill zero-bit method of adjustment with roll-force protection may further comprise the steps:

Step 1, start the zero-bit adjustment, the zero-bit position is replied in roll shifting, and roll gap is opened to maximum position, and sensor resets, initiation parameter i=0, inspection roll shifting position, like roll shifting not in zero-bit, system alarm, zero-bit adjustment program stops;

Step 2, in-position control, press down system is depressed into specified roll gap; As shown in Figure 1, press down system drops to specified roll gap with certain speed, wherein for the relation of position that relates to and pressure, adopts following method control:

That is, the realization of Place object value is controlled by the roll-force that the position set-point converts milling train into

Target roll-force=(oil is annotated set-point-oil and annotated actual value)/mill stiffness

Step 3, the control of entering roll-force, the adjustment of one stage of press down system; After pressure head resetted, press down system provided specified roll-force T of a stage 1, write down a stage fore side roll-force With a stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, to satisfying condition a) simultaneously and b) or the c that satisfies condition simultaneously) and d):

A) both sides roll-force and

B) both sides roll-force poor

C) fore side roll-force

D) transmission side roll-force

Wherein in carrying out pressure controlled process, adopt the method for Position Control,, relate to and judge in the Position Control process that roll-force control idiographic flow is as shown in Figure 2 to guarantee the accuracy of frame roll gap position at this moment.

Step 4, the adjustment of press down system two-stage, press down system provide zero-bit adjustment roll-force T 2, record two-stage fore side roll-force With two-stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, and do following selection:

1) as the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, get into step 5:

2) as the static leveling e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, system carries out leveling to be calculated, and opens roll gap then to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return step 3; As i>10 the time, roll gap is opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;

E) both sides roll-force and

F) both sides roll-force poor

G) fore side roll-force

H) transmission side roll-force

Step 5, inspection oil are annotated deviation, and press down system rises to behind the specified roll gap press down system and is depressed into specified roll-force T of a stage is provided 1, relatively the deviation of transmission side and fore side both sides oil notes when both sides oil is annotated deviation smaller or equal to 3mm, gets into step 6; When both sides oil was annotated deviation greater than 3mm, roll gap was opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;

The inspection of changing trains or buses of step 6, milling train, the milling train back system of changing trains or buses carries out speed inspection, when the milling train speed entering step 7 during to normal speed of changing trains or buses; When the milling train speed of changing trains or buses does not reach normal speed, return step 4;

Step 7, the roll-force deviation check when milling train is changed trains or buses, press down system are progressively from specified roll-force T of a stage 1Be pressurized to zero-bit adjustment roll-force T 2, press down in press down system and to be rolled the power deviation check in the process, the record fore side roll-force of changing trains or buses With the transmission side roll-force of changing trains or buses , and do following selection:

1) the both sides rolling force i that satisfies condition simultaneously) and the k that j) or simultaneously satisfies condition) and l) time, get into step 8;

2) the both sides roll-force e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, return step 5;

I) both sides roll-force and

J) both sides roll-force poor

K) fore side roll-force

L) transmission side roll-force

Step 8, press down system are depressed into zero-bit adjustment roll-force T 2After stop the action, write down final fore side roll-force With final transmission side roll-force , confirm by operating personnel; When operating personnel confirm to accomplish, be zero-bit position roll-force with current roll-force, control system validation roll gap and the oily relation of annotating detect oil and gaze at the zero-bit position of front position as milling train, and press down system resets, zero-bit adjustment completion; When operating personnel confirmed to abandon, press down system resetted, and system reports to the police, zero-bit adjustment program interrupt.

In the present embodiment, specified roll-force T of a described stage 1Be 300~500t, described zero-bit adjustment roll-force T 2Be 1000~1500t, described specified roll gap is 10mm.

Claims (4)

1. the continuous hot-rolling mill zero-bit method of adjustment with roll-force protection is characterized in that, may further comprise the steps:
Step 1, the adjustment of startup zero-bit, the zero-bit position is replied in roll shifting, and roll gap is opened to maximum position, and sensor resets, initiation parameter i=0;
Step 2, in-position control, press down system is depressed into specified roll gap;
Step 3, the control of entering roll-force, the adjustment of one stage of press down system; After pressure head resetted, press down system provided specified roll-force T of a stage 1, write down a stage fore side roll-force With a stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, to satisfying condition a) simultaneously and b) or the c that satisfies condition simultaneously) and d):
A) both sides roll-force and
B) both sides roll-force poor
C) fore side roll-force
D) transmission side roll-force
Step 4, the adjustment of press down system two-stage, press down system provide zero-bit adjustment roll-force T 2, record two-stage fore side roll-force With two-stage transmission side roll-force , carry out then that a side is lifted, the static leveling under the side pressure, and do following selection:
1) as the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, get into step 5:
2) as the static leveling e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, system carries out leveling to be calculated, and opens roll gap then to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return step 3; As i>10 the time, roll gap is opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;
E) both sides roll-force and
F) both sides roll-force poor
G) fore side roll-force
H) transmission side roll-force
Step 5, inspection oil are annotated deviation, and press down system rises to behind the specified roll gap press down system and is depressed into specified roll-force T of a stage is provided 1, relatively the deviation of transmission side and fore side both sides oil notes when both sides oil is annotated deviation smaller or equal to 3mm, gets into step 6; When both sides oil was annotated deviation greater than 3mm, roll gap was opened to maximum position, and system reports to the police, and the zero-bit adjustment stops;
The inspection of changing trains or buses of step 6, milling train, the milling train back system of changing trains or buses carries out speed inspection, when the milling train speed entering step 7 during to normal speed of changing trains or buses; When the milling train speed of changing trains or buses does not reach normal speed, return step 4;
Step 7, the roll-force deviation check when milling train is changed trains or buses, press down system are progressively from specified roll-force T of a stage 1Be pressurized to zero-bit adjustment roll-force T 2, press down in press down system and to be rolled the power deviation check in the process, the record fore side roll-force of changing trains or buses With the transmission side roll-force of changing trains or buses , and do following selection:
1) the both sides rolling force i that satisfies condition simultaneously) and the k that j) or simultaneously satisfies condition) and l) time, get into step 8;
2) the both sides roll-force e that can not satisfy condition simultaneously) and f) or the g that can not satisfy condition simultaneously) and h) time, return step 5;
I) both sides roll-force and
J) both sides roll-force poor
K) fore side roll-force
L) transmission side roll-force
Step 8, press down system are depressed into zero-bit adjustment roll-force T 2After stop the action, write down final fore side roll-force With final transmission side roll-force , confirm by operating personnel; When operating personnel confirmed to accomplish, control system validation roll gap and the oily relation of annotating detected oil and gaze at the zero-bit position of front position as milling train, and press down system resets, zero-bit adjustment completion; When operating personnel confirmed to abandon, press down system resetted, and system reports to the police, zero-bit adjustment program interrupt.
2. the continuous hot-rolling mill zero-bit method of adjustment with roll-force protection as claimed in claim 1 is characterized in that: also comprise inspection roll shifting position in the said step 1, like roll shifting not in zero-bit, system alarm, zero-bit adjustment program stops.
3. the continuous hot-rolling mill zero-bit method of adjustment with roll-force protection as claimed in claim 1 is characterized in that: specified roll-force T of a described stage 1Be 300~500t, described zero-bit adjustment roll-force T 2Be 1000~1500t.
4. the continuous hot-rolling mill zero-bit method of adjustment with roll-force protection as claimed in claim 1, it is characterized in that: described specified roll gap is 10mm.
CN 201110005583 2011-01-12 2011-01-12 Hot tandem mill zero-position adjusting method with rolling force protection effect CN102581036B (en)

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CN102873106A (en) * 2012-09-29 2013-01-16 鞍钢股份有限公司 Quick and precise elongation control method for temper mill
CN104070072A (en) * 2013-03-27 2014-10-01 宝山钢铁股份有限公司 Leveling method for zero-adjustment rolling roll gaps of working rolls
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
CN105665451A (en) * 2016-03-15 2016-06-15 山东钢铁股份有限公司 Calibration method for finishing mill
CN105689397A (en) * 2016-03-09 2016-06-22 首钢京唐钢铁联合有限责任公司 Method for eliminating zero error
CN106975665A (en) * 2016-01-19 2017-07-25 宝山钢铁股份有限公司 A kind of milling equipment precision online test method
CN107088584A (en) * 2016-02-17 2017-08-25 宝山钢铁股份有限公司 The interlock protection control method and system of vertical miller
CN109877165A (en) * 2019-04-10 2019-06-14 北京科技大学设计研究院有限公司 A kind of automatic acyclic homologically trioial method containing roll neck compensating for variations after roll change
CN110523778A (en) * 2019-09-25 2019-12-03 马鞍山钢铁股份有限公司 A kind of control method of universal profiled rolling mill upper roller compensating cylinder roll change position
CN110523778B (en) * 2019-09-25 2020-09-04 马鞍山钢铁股份有限公司 Control method for roll changing position of upper roll balance cylinder of universal section mill

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102873106A (en) * 2012-09-29 2013-01-16 鞍钢股份有限公司 Quick and precise elongation control method for temper mill
CN102873106B (en) * 2012-09-29 2014-12-03 鞍钢股份有限公司 Quick and precise elongation control method for temper mill
CN104070072B (en) * 2013-03-27 2016-02-24 宝山钢铁股份有限公司 A kind of leveling method of acyclic homologically trioial working roll open rolling roll gap
CN104070072A (en) * 2013-03-27 2014-10-01 宝山钢铁股份有限公司 Leveling method for zero-adjustment rolling roll gaps of working rolls
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
CN106975665B (en) * 2016-01-19 2019-09-20 宝山钢铁股份有限公司 A kind of milling equipment precision online test method
CN106975665A (en) * 2016-01-19 2017-07-25 宝山钢铁股份有限公司 A kind of milling equipment precision online test method
CN107088584A (en) * 2016-02-17 2017-08-25 宝山钢铁股份有限公司 The interlock protection control method and system of vertical miller
CN105689397A (en) * 2016-03-09 2016-06-22 首钢京唐钢铁联合有限责任公司 Method for eliminating zero error
CN105689397B (en) * 2016-03-09 2017-08-08 首钢京唐钢铁联合有限责任公司 A kind of method for eliminating the error of zero
CN105665451B (en) * 2016-03-15 2017-06-23 山东钢铁股份有限公司 Finishing mill scaling method
CN105665451A (en) * 2016-03-15 2016-06-15 山东钢铁股份有限公司 Calibration method for finishing mill
CN109877165A (en) * 2019-04-10 2019-06-14 北京科技大学设计研究院有限公司 A kind of automatic acyclic homologically trioial method containing roll neck compensating for variations after roll change
CN110523778A (en) * 2019-09-25 2019-12-03 马鞍山钢铁股份有限公司 A kind of control method of universal profiled rolling mill upper roller compensating cylinder roll change position
CN110523778B (en) * 2019-09-25 2020-09-04 马鞍山钢铁股份有限公司 Control method for roll changing position of upper roll balance cylinder of universal section mill

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