CN102581036B - 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 PDFInfo
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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
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, in each rear process of determining zero Roll-gap position of roll (comprising working roll and backing roll) of changing, is referred to as to depress the zero-bit adjustment.When in the zero-bit adjustment process, its roll-force must reach the value of regulation, its zero Roll-gap position of depressing in the zero-bit adjustment can find.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 cylinder synchronous pressings are to making a concerted effort 300～500 tons, and its two sides rolling force deviation is to be converted into oil by rolling force deviation to annotate after deviation and adopt 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 cylinder synchronous pressings are to making a concerted effort 1000～1500 tons afterwards;
The 3rd step: complete the preservation of roll gap a reference value, upload a reference value to host computer simultaneously;
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 finish rolling is waited for into steel.
The problem existed:
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 its size of relevant equipment makes a mistake, and will cause the damage of roll and relevant device.
2, the automation in the acyclic homologically trioial process, once roll-force is abnormal, personnel can't manually intervene, and cause fault spread.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of continuous hot-rolling mill zero-bit method of adjustment with roll-force protection; by 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 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, comprises the following 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 are controlled, and press down system is depressed into specified roll gap;
Step 3, enter roll-force and control, the press down system one-phase is adjusted; After pressure head resets, press down system provides one-phase specified roll-force T
1, record one-phase fore side roll-force
with one-phase transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, to satisfy condition a) and b simultaneously) or the c that simultaneously satisfies condition) and d):
A) the both sides roll-force and
B) the both sides roll-force is poor
C) fore side roll-force
D) transmission side roll-force
Step 4, press down system two-stage are adjusted, and press down system provides zero-bit to adjust roll-force T
2, record two-stage fore side roll-force
with two-stage transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, and do following selection:
1) when the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, enter step 5;
2) when the static leveling e that can not satisfy condition simultaneously) and the f) g that can not simultaneously satisfy condition) and h) time, system is carried out leveling calculating, then opens roll gap to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return to step 3; As i > 10 the time, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
E) the both sides roll-force and
F) the both sides roll-force is poor
G) fore side roll-force
H) transmission side roll-force
Step 5, check that oil annotates deviation, press down system rises to after specified roll gap press down system and is depressed into and provides one-phase specified roll-force T
1, the deviation that relatively transmission side and fore side both sides oil are annotated, when both sides oil notes deviation is less than or equal to 3mm, enter step 6; When both sides oil notes deviation is greater than 3mm, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
Step 6, milling train change trains or buses to check, the milling train rear system of changing trains or buses is carried out the speed inspection, when the milling train speed of changing trains or buses enters step 7 during to normal speed; When the milling train speed of changing trains or buses does not reach normal speed, return to step 4;
Rolling force deviation inspection when step 7, milling train are changed trains or buses, press down system is progressively from the specified roll-force T of one-phase
1be pressurized to zero-bit and adjust roll-force T
2, press down in process and be rolled the power deviation check in press down system, record the 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 simultaneously satisfies condition) and the k that j) or simultaneously satisfies condition) and l) time, enter step 8;
2) k the both sides roll-force i that can not simultaneously satisfy condition) and j) can not satisfy condition simultaneously) and l) time, return to step 5;
I) the both sides roll-force and
J) the both sides roll-force is poor
K) fore side roll-force
L) transmission side roll-force
Step 8, press down system are depressed into zero-bit and adjust roll-force T
2after stop the action, record final fore side roll-force
with final transmission side roll-force
, by operating personnel, confirmed; When operating personnel have determined, control system is confirmed the relation that roll gap and oil are annotated, and detects oil and gazes at the zero-bit position of front position as milling train, and press down system resets, and the zero-bit adjustment completes; When operating personnel determine that while abandoning, press down system resets, system is reported to the police, and the zero-bit adjustment programme interrupts.
Also comprise in described step 1 and check the roll shifting position, as roll shifting not in zero-bit, system alarm, the zero-bit adjustment programme stops.
The specified roll-force T of described one-phase
1be 300～500t, described zero-bit is adjusted 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 by relating to the control of continuous hot-rolling mill maximum rolling force when zero-bit is adjusted, Position Control during for the 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 adjustment process; Along with improving constantly of hot rolling technology technology, the automaticity of adjusting for the frame zero-bit related to is more and more higher, and the popularization of present technique can effectively improve the device security in automatic zero-bit adjustment process, has promotional value more widely.
The accompanying drawing explanation
The FB(flow block) that Fig. 1 is Position Control in step of the present invention;
Fig. 2 relates to the FB(flow block) that in the Position Control process, the judgement roll-force is controlled in 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 are not used in and limit the scope of the invention for the present invention is described.Should be understood that in addition those skilled in the art can make various changes or modifications 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 limited range equally.
A kind of continuous hot-rolling mill zero-bit method of adjustment with roll-force protection comprises the following 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, and initiation parameter i=0 checks the roll shifting position, as roll shifting not in zero-bit, system alarm, the zero-bit adjustment programme stops;
Step 2, in-position are controlled, and 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 the position related to and pressure, adopts following methods to control:
That is the roll-force that, the realization of Place object value is converted to milling train by the position set-point is controlled
Target roll-force=(oil is annotated set-point-oil and annotated actual value)/mill stiffness
Step 3, enter roll-force and control, the press down system one-phase is adjusted; After pressure head resets, press down system provides one-phase specified roll-force T
1, record one-phase fore side roll-force
with one-phase transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, to satisfy condition a) and b simultaneously) or the c that simultaneously satisfies condition) and d):
A) the both sides roll-force and
B) the both sides roll-force is poor
C) fore side roll-force
D) transmission side roll-force
Wherein, in carrying out pressure controlled process, adopt the method for Position Control, to guarantee the accuracy of frame Roll-gap position now, relate to judgement roll-force in the Position Control process and control idiographic flow as shown in Figure 2.
Step 4, press down system two-stage are adjusted, and press down system provides zero-bit to adjust roll-force T
2, record two-stage fore side roll-force
with two-stage transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, and do following selection:
1) when the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, enter step 5;
2) when the static leveling e that can not satisfy condition simultaneously) and the f) g that can not simultaneously satisfy condition) and h) time, system is carried out leveling calculating, then opens roll gap to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return to step 3; As i > 10 the time, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
E) the both sides roll-force and
F) the both sides roll-force is poor
G) fore side roll-force
H) transmission side roll-force
Step 5, check that oil annotates deviation, press down system rises to after specified roll gap press down system and is depressed into and provides one-phase specified roll-force T
1, the deviation that relatively transmission side and fore side both sides oil are annotated, when both sides oil notes deviation is less than or equal to 3mm, enter step 6; When both sides oil notes deviation is greater than 3mm, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
Step 6, milling train change trains or buses to check, the milling train rear system of changing trains or buses is carried out the speed inspection, when the milling train speed of changing trains or buses enters step 7 during to normal speed; When the milling train speed of changing trains or buses does not reach normal speed, return to step 4;
Rolling force deviation inspection when step 7, milling train are changed trains or buses, press down system is progressively from the specified roll-force T of one-phase
1be pressurized to zero-bit and adjust roll-force T
2, press down in process and be rolled the power deviation check in press down system, record the 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 simultaneously satisfies condition) and the k that j) or simultaneously satisfies condition) and l) time, enter step 8;
2) k the both sides roll-force i that can not simultaneously satisfy condition) and j) can not satisfy condition simultaneously) and l) time, return to step 5;
I) the both sides roll-force and
J) the both sides roll-force is poor
K) fore side roll-force
L) transmission side roll-force
Step 8, press down system are depressed into zero-bit and adjust roll-force T
2after stop the action, record final fore side roll-force
with final transmission side roll-force
, by operating personnel, confirmed; When operating personnel have determined, take current roll-force as zero-bit position roll-force, control system is confirmed the relation that roll gap and oil are annotated, and detects oil and gazes at the zero-bit position of front position as milling train, and press down system resets, and the zero-bit adjustment completes; When operating personnel determine that while abandoning, press down system resets, system is reported to the police, and the zero-bit adjustment programme interrupts.
In the present embodiment, the specified roll-force T of described one-phase
1be 300～500t, described zero-bit is adjusted 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, comprises the following 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 are controlled, and press down system is depressed into specified roll gap;
Step 3, enter roll-force and control, the press down system one-phase is adjusted; After pressure head resets, press down system provides one-phase specified roll-force T
1, record one-phase fore side roll-force
with one-phase transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, to satisfy condition a) and b simultaneously) or the c that simultaneously satisfies condition) and d):
A) the both sides roll-force and
B) the both sides roll-force is poor
C) fore side roll-force
D) transmission side roll-force
Step 4, press down system two-stage are adjusted, and press down system provides zero-bit to adjust roll-force T
2, record two-stage fore side roll-force
with two-stage transmission side roll-force
, then carry out that a side is lifted, the static leveling under a side pressure, and do following selection:
1) when the static leveling e that can satisfy condition simultaneously) and the g that f) or simultaneously satisfies condition) and h) time, enter step 5;
2) when the static leveling e that can not satisfy condition simultaneously) and the f) g that can not simultaneously satisfy condition) and h) time, system is carried out leveling calculating, then opens roll gap to specified roll gap, carries out the frame leveling, assignment i=i+1; When i≤10, return to step 3; As i > 10 the time, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
E) the both sides roll-force and
F) the both sides roll-force is poor
G) fore side roll-force
H) transmission side roll-force
Step 5, check that oil annotates deviation, press down system rises to after specified roll gap press down system and is depressed into and provides one-phase specified roll-force T
1, the deviation that relatively transmission side and fore side both sides oil are annotated, when both sides oil notes deviation is less than or equal to 3mm, enter step 6; When both sides oil notes deviation is greater than 3mm, roll gap is opened to maximum position, and system is reported to the police, and the zero-bit adjustment stops;
Step 6, milling train change trains or buses to check, the milling train rear system of changing trains or buses is carried out the speed inspection, when the milling train speed of changing trains or buses enters step 7 during to normal speed; When the milling train speed of changing trains or buses does not reach normal speed, return to step 4;
Rolling force deviation inspection when step 7, milling train are changed trains or buses, press down system is progressively from the specified roll-force T of one-phase
1be pressurized to zero-bit and adjust roll-force T
2, press down in process and be rolled the power deviation check in press down system, record the 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 simultaneously satisfies condition) and the k that j) or simultaneously satisfies condition) and l) time, enter step 8;
2) k the both sides roll-force i that can not simultaneously satisfy condition) and j) can not satisfy condition simultaneously) and l) time, return to step 5;
I) the both sides roll-force and
J) the both sides roll-force is poor
K) fore side roll-force
L) transmission side roll-force
Step 8, press down system are depressed into zero-bit and adjust roll-force T
2after stop the action, record final fore side roll-force
with final transmission side roll-force
, by operating personnel, confirmed; When operating personnel have determined, control system is confirmed the relation that roll gap and oil are annotated, and detects oil and gazes at the zero-bit position of front position as milling train, and press down system resets, and the zero-bit adjustment completes; When operating personnel determine that while abandoning, press down system resets, system is reported to the police, and the zero-bit adjustment programme interrupts.
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 in described step 1 and check the roll shifting position, as roll shifting not in zero-bit, system alarm, the zero-bit adjustment programme 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: the specified roll-force T of described one-phase
1be 300～500t, described zero-bit is adjusted 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.
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| CN 201110005583 CN102581036B (en) | 2011-01-12 | 2011-01-12 | Hot tandem mill zero-position adjusting method with rolling force protection effect |
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| CN 201110005583 CN102581036B (en) | 2011-01-12 | 2011-01-12 | Hot tandem mill zero-position adjusting method with rolling force protection effect |
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| CN105689397B (en) * | 2016-03-09 | 2017-08-08 | 首钢京唐钢铁联合有限责任公司 | Method for eliminating zero error |
| CN105665451B (en) * | 2016-03-15 | 2017-06-23 | 山东钢铁股份有限公司 | Finishing mill scaling method |
| CN109877165B (en) * | 2019-04-10 | 2020-06-26 | 北京科技大学设计研究院有限公司 | Automatic zero adjustment method for roll change compensation after roll change |
| 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 |
| CN111112345B (en) * | 2019-12-25 | 2021-08-17 | 鞍钢集团自动化有限公司 | Control method for automatically compensating deviation generated by calibration of horizontal rolling mill |
| CN112139257B (en) * | 2020-08-28 | 2022-06-24 | 北京科技大学设计研究院有限公司 | Method for correcting zero adjustment of absolute equipment position of rolling mill |
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