CN106984650B - The method for controlling thickness of aluminum and Aluminum Alloy Plate - Google Patents
The method for controlling thickness of aluminum and Aluminum Alloy Plate Download PDFInfo
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- CN106984650B CN106984650B CN201710271954.XA CN201710271954A CN106984650B CN 106984650 B CN106984650 B CN 106984650B CN 201710271954 A CN201710271954 A CN 201710271954A CN 106984650 B CN106984650 B CN 106984650B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
Abstract
The invention discloses a kind of aluminum and the method for controlling thickness of Aluminum Alloy Plate, are related to metal-pressed machine technical field, this approach includes the following steps：A, according to knowhow, according to alloy species and finished width and finished product thickness, the gap values between rollers table of presetting 4 passages reciprocal；When rolling, according to alloy species and finished width and finished product thickness, the setting gap values between rollers of corresponding 4 passages reciprocal are obtained from gap values between rollers table, the drafts for 3 passages reciprocal that are ranked；B, according to the setting gap values between rollers of actual measurement plate thickness and the passage after the rolling for completing the 2nd passage reciprocal, the setting gap values between rollers of extreme trace time are corrected；C, when rolling extreme trace time, according to the actual measurement roll-force of this passage, the actual measurement roll-force and mill stiffness of the 2nd passage reciprocal, gap values between rollers progress on-line amending is carried to having.The present invention solves the problems, such as how to control effectively to the rolling thickness of aluminium and Aluminum Alloy Plate under conditions of milling train is not equipped with temperature measurement on-line instrument and calibrator.
Description
Technical field
The present invention relates to metal-pressed machine technical field, the thickness control of especially a kind of aluminum and Aluminum Alloy Plate
Method processed.
Background technology
Currently, the thickness control system of relatively advanced Aluminum Alloy Plate milling train, it is common that by under second-level model system
The presetting table of rolling procedure of hair and passage debugging functions two parts based on passage measured value are constituted.The original substantially of first part
Reason is that supplied materials data and related process parameters input tube rolling simulation model are calculated the roll-force of each passage, further according to rolling
The spring curve of machine sets out every time roll gap, but is limited to the precomputation precision problem of tube rolling simulation model, presses completely
It is rolled according to the presetting table of rolling procedure, frequently can lead to that cut deal finished product thickness is seriously overproof, this just needs second part
Carry out online compensation.The basic principle of second part is, in three passages reciprocal, the actual measurement number according to temperature measurer and calibrator
According to, in real time correct mill roll-gap value, with eliminate roll all preamble passages when due to caused by tube rolling simulation model bias
Cumulative thickness deviation, by finished product thickness control within the margin of tolerance of permission.At the scene in actual application, although this is thick
The degree of automation for spending control system is very high, but there is also following drawbacks：First, the requirement to device configuration is very high, it is necessary to
Arrange that high performance temperature measurement on-line instrument and calibrator, investment are larger before and after milling train；Second, the operating status to equipment and measurement
Required precision is very high, and the operating status of temperature measurer and calibrator is good, otherwise can not provide passage and correct required real-time number
According to, once instrument failure in the operation of rolling, can cause monoblock rolled piece to be scrapped.In addition, the measurement essence of temperature measurer and calibrator
Degree is very high, and no it will cause passage corrected Calculation deviations.But the rolling environment very severe of Aluminum Alloy Plate, emulsion
The high temperature of water spray, the air-flow of air purging and milling train, all brings the measurement accuracy of in-line meter especially temperature measurer
Larger interference.
Invention content
The object of the present invention is to provide a kind of aluminum and the method for controlling thickness of Aluminum Alloy Plate, this method can be with
Solve how under conditions of milling train is not equipped with temperature measurement on-line instrument and calibrator to the rolling thickness of aluminium and Aluminum Alloy Plate
The problem of controling effectively.
To solve the above-mentioned problems, the technical solution adopted by the present invention is：The thickness of this aluminum and Aluminum Alloy Plate
Degree control method includes the following steps：A, it is preset according to alloy species and finished width and finished product thickness according to knowhow
The gap values between rollers table of 4 passages of fixed inverse；When rolling, according to alloy species and finished width and finished product thickness, from gap values between rollers table
The middle setting gap values between rollers for obtaining corresponding 4 passages reciprocal, the drafts for 3 passages reciprocal that are ranked；
B, it according to the setting gap values between rollers of actual measurement plate thickness and the passage after the rolling for completing the 2nd passage reciprocal, corrects
The setting gap values between rollers of extreme trace time；
C, rigid according to the actual measurement roll-force of this passage, the actual measurement roll-force of the 2nd passage reciprocal and milling train when rolling extreme trace time
Degree carries gap values between rollers progress on-line amending to having.
In the technical solution of the method for controlling thickness of the rolling aluminium and Aluminum Alloy Plate, more specific technical solution is also
Can be：The setting gap values between rollers method that extreme trace time is corrected in step B is as follows：
After completing the rolling of 2nd passage reciprocal, manual measurement plate thickness at this time simultaneously inputs second-level model system,
Assuming that the actual measurement thickness is Hreal-2, unit is millimeter；Assuming that the actual measurement roll-force of the passage is Freal-2, unit is thousand Ns；Two
Grade model system is according to actual measurement plate thickness Hreal-2With the setting gap values between rollers S of the passageset-2, correct the setting roll gap of extreme trace time
Value Sset-1, it is assumed that the first roll gap correction value of extreme trace time is Δ S1, unit is millimeter, then Δ S1Value be：
ΔS1=Hreal-2-Sset-2
As Δ S1When ＞ 0, illustrate the setting roll gap S of extreme trace timeset-1Δ S should be reduced1；
As Δ S1When ＜ 0, illustrate the setting roll gap S of extreme trace timeset-1Δ S should be increased1。
Further, there is the on-line amending method for carrying gap values between rollers as follows in step C：
Assuming that mill stiffness is M, unit is thousand Ns/millimeter；Assuming that the actual measurement roll-force of rolling extreme trace time is Freal-1, single
Position is thousand Ns；Assuming that the on-line amending value of gap values between rollers is Δ S when rolling extreme trace time2, unit is millimeter；Assuming that when rolling extreme trace time
Have carry gap values between rollers be Sload-1, unit is millimeter；
When rolling extreme trace time, rolled piece starts timing after entering roll gap, after measuring roll-force 2-4 seconds by rolling force sensor
Obtain actual measurement rolling force Freal-1, unit is thousand Ns；The actual measurement roll-force of the actual measurement roll-force and the 2nd passage reciprocal is compared
Compared with the computational methods of the on-line amending value of gap values between rollers are when then rolling extreme trace time：
As Δ S2When ＞ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be reduced2；
As Δ S2When ＜ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be increased2；
When basic automation systems complete Δ S2Numerical computations after be immediately controlled milling train hydraulic cylinder action, with realize should
The amendment of roll gap is no longer adjusted roll gap after completion has load roll gap to correct, until last passes terminate.
Further, when not having corresponding finished product thickness value in gap values between rollers table, which is obtained using linear interpolation method
4 passages of inverse corresponding to thickness value set gap values between rollers；Assuming that the section where the finished product thickness value is [H1,H2], it is corresponding
The 4th passage of inverse setting gap values between rollers Sset-4The section at place isCorresponding the 3rd passage of inverse is set
Determine gap values between rollers Sset-3The section at place isThe setting gap values between rollers S of corresponding the 2nd passage of inverseset-2Place
Section isThe setting gap values between rollers S of corresponding the 1st passage of inverseset-1The section at place is
The then setting gap values between rollers S of the 4th passage reciprocalset-4Calculation formula be：
The setting gap values between rollers S of 3rd passage reciprocalset-3Calculation formula be：
The setting gap values between rollers S of 2nd passage reciprocalset-2Calculation formula be：
The setting gap values between rollers S of 1st passage reciprocalset-1Calculation formula be：
Wherein, H1、H2、Unit be
Millimeter.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：It can roll
Under conditions of machine is not equipped with temperature measurement on-line instrument and calibrator, the rolling thickness of aluminium and Aluminum Alloy Plate is effectively controlled
System, through on-site verification, thickness deviation can control within ± 0.1 millimeter of desired value；Simultaneously, it is thus also avoided that badly produce ring
Interference, improves yield rate, reduces finished product caused by border.
Specific implementation mode
With reference to embodiment, the invention will be further described：
The method for controlling thickness of this aluminum and Aluminum Alloy Plate includes the following steps：
Step A, according to knowhow, according to alloy species and finished width and finished product thickness, presetting 4 roads reciprocal
Secondary gap values between rollers, by these gap values between rollers data summarizations at gap values between rollers table；When rolling, according to alloy species and finished width and at
Product thickness obtains the setting gap values between rollers of corresponding 4 passages reciprocal from gap values between rollers table, the drafts for 3 passages reciprocal that are ranked；
The drafts of artificial setting 3 passages reciprocal, specific reduction distribution numerical value see attached list 1, can also read the gap values between rollers table
Enter second-level model system, the reduction distribution for 3 passages reciprocal；Its object is to the roll-force bases of 3 passages after ensureing
This is equal.The table comes from magnanimity actual measurement data of the production scene to the rolled piece of different-alloy, different size, if energy
When enough ensuring to carry out reduction distribution according to the numerical value in gap values between rollers table, the roll-force of 3 passages reciprocal can tend to be identical substantially.
Then the setting gap values between rollers of milling train and the exit thickness setting value of 4 passages reciprocal are consistent.Table 1 is various alloys not
The presetting gap values between rollers table of 4 passages of inverse of same width, thickness, the setting data in table are suitable for finishing temperature and are more than 320 DEG C
Under conditions of.
Assuming that the finished width of cut deal is WP, unit is millimeter；Finished product thickness is HP, unit is millimeter；It is fallen in pass schedule
The 4th passage of number sets gap values between rollers as Sset-4, unit is millimeter；3rd passage reciprocal sets gap values between rollers as Sset-3, unit is milli
Rice；2nd passage reciprocal sets gap values between rollers as Sset-2, unit is millimeter；Extreme trace sets gap values between rollers as Sset-1, unit is millimeter.
The case where due to 5 multiple in [15,50] section of the finished product thickness value that has been only exemplified by table 1, if herein
Actual finished product thickness value in interval range is not 5 multiple, and linear interpolation method may be used and obtain the finished product thickness value institute
Corresponding 4 passages reciprocal set gap values between rollers.In table 1, it is assumed that the section where the finished product thickness value is [H1,H2], it is corresponding
The 4th passage of inverse setting gap values between rollers Sset-4The section at place isCorresponding the 3rd passage of inverse is set
Determine gap values between rollers Sset-3The section at place isThe setting gap values between rollers S of corresponding the 2nd passage of inverseset-2Place
Section isThe setting gap values between rollers S of corresponding the 1st passage of inverseset-1The section at place is
The then setting gap values between rollers S of the 4th passage reciprocalset-4Calculation formula be：
The setting gap values between rollers S of 3rd passage reciprocalset-3Calculation formula be：
The setting gap values between rollers S of 2nd passage reciprocalset-2Calculation formula be：
The setting gap values between rollers S of 1st passage reciprocalset-1Calculation formula be：
Wherein, H1、H2、Unit be
Millimeter.
Step B, after completing the rolling of 2nd passage reciprocal, manual measurement plate thickness at this time simultaneously inputs two level mould
Type system, second-level model system correct the setting roll gap of extreme trace time according to the actual measurement plate thickness and setting gap values between rollers of the passage
Value.
Assuming that the actual measurement thickness is Hreal-2, unit is millimeter；Assuming that the actual measurement roll-force of the passage is Freal-2, unit is
Thousand Ns.Second-level model system is according to actual measurement plate thickness Hreal-2With the setting gap values between rollers S of the passageset-2, correct setting for extreme trace time
Determine gap values between rollers Sset-1., it is assumed that the first roll gap correction value of extreme trace time is Δ S1, unit is millimeter, then Δ S1Value be：
ΔS1=Hreal-2-Sset-2
As Δ S1When ＞ 0, illustrate the setting roll gap S of extreme trace timeset-1Δ S should be reduced1。
As Δ S1When ＜ 0, illustrate the setting roll gap S of extreme trace timeset-1Δ S should be increased1。
Step C, when rolling extreme trace time, when the rolled piece junior one bites mill roll-gap, basic automation systems are according to currently
Roll-force, the actual measurement roll-force of upper a time and mill stiffness are surveyed, gap values between rollers progress on-line amending is carried to having, to reach to plate
The purpose that material finished product thickness is controlled.
Assuming that mill stiffness is M, unit is thousand Ns/millimeter；Assuming that the actual measurement roll-force of rolling extreme trace time is Freal-1, single
Position is thousand Ns；Assuming that the on-line amending value of gap values between rollers is Δ S when rolling extreme trace time2, unit is millimeter；Assuming that when rolling extreme trace time
Have carry gap values between rollers be Sload-1, unit is millimeter.
When rolling extreme trace time, rolled piece starts timing after entering roll gap, after measuring roll-force 2-4 seconds by rolling force sensor
Obtain actual measurement rolling force Freal-1, unit is thousand Ns.The actual measurement roll-force of the actual measurement roll-force and the 2nd passage reciprocal is compared
Compared with the computational methods of the on-line amending value of gap values between rollers are when then rolling extreme trace time：
As Δ S2When ＞ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be reduced2。
As Δ S2When ＜ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be increased2。
When basic automation systems complete Δ S2Numerical computations after be immediately controlled milling train hydraulic cylinder action, with realize should
The amendment of roll gap.After completion has load roll gap to correct, no longer roll gap is adjusted, until last passes terminate.
Embodiment 1
Assuming that the finished width of cut deal is WP=2000 millimeters；Finished product thickness is HP=25 millimeters；Assuming that the cut deal is
5XXX alloys.Since finished product thickness value is exactly 5 multiple, without carrying out linear interpolation processing, directly looked into according to trimmed size
It askes after table 1 it is found that reciprocal 4th passage sets gap values between rollers as S in pass scheduleset-4=41 millimeters；3rd passage reciprocal sets roll gap
Value is Sset-3=33 millimeters；2nd passage reciprocal sets gap values between rollers as Sset-2=28 millimeters；Extreme trace sets gap values between rollers as Sset-1
=25 millimeters.The drafts for 3 passages reciprocal that are ranked as a result,.
After completing the rolling of 2nd passage reciprocal, manual measurement plate thickness at this time simultaneously inputs second-level model system,
Assuming that the actual measurement thickness is H after measurementreal-2=28.55 millimeters；Assuming that the actual measurement roll-force of the passage is Freal-2=20000
Thousand Ns.Second-level model system is according to actual measurement plate thickness Hreal-2With the gap values between rollers S of the passageset-2, correct the setting roller of extreme trace time
Seam value Sset-1.Assuming that the first roll gap correction value of extreme trace time is Δ S1, unit is millimeter, then Δ S1Value be：
ΔS1=Hreal-2-Sset-2=28.55-28=0.55 millimeters
Due to Δ S1＞ 0 illustrates the setting roll gap S of extreme trace timeset-1Δ S should be reduced1。
Sset-1=25-0.55=24.45 millimeters
Assuming that mill stiffness is thousand Ns/millimeters of M=6000；Assuming that the actual measurement roll-force of rolling extreme trace time is Freal-1, unit
It is thousand Ns；Assuming that the on-line amending value of gap values between rollers is Δ S when rolling extreme trace time2, unit is millimeter；Assuming that when rolling extreme trace time
Have and carries gap values between rollers as Sload-1, S is measured as through position sensorload-1=25.15 millimeters.
When rolling extreme trace time, rolled piece starts timing after entering roll gap, and roll-force is measured 2~4 seconds by rolling force sensor
After obtain actual measurement rolling force Freal-1=22,000 thousand Ns.The actual measurement roll-force of the actual measurement roll-force and the 2nd passage reciprocal is carried out
Compare, then the computational methods of the on-line amending value of gap values between rollers are when rolling extreme trace time：
Due to Δ S2＞ 0 illustrates that having for extreme trace time carries gap values between rollers Sload-1Δ S should be reduced2。
Sload-1=25.15-0.33=24.82 millimeters
When basic automation systems complete Δ S2Numerical computations after be immediately controlled milling train hydraulic cylinder action, will have load roller
Seam is reduced from 25.12 millimeters to 24.82 millimeters.After completion has load roll gap to correct, no longer roll gap is adjusted, until extreme trace
Rolling terminates.Through on-site verification, thickness deviation can control within ± 0.1 millimeter of desired value.
Embodiment 2
Assuming that the finished width of cut deal is WP=1500 millimeters；Finished product thickness is HP=18 millimeters；Assuming that the cut deal is
8XXX alloys.Since finished product thickness value is not 5 multiple, need to carry out linear interpolation processing, after trimmed size inquiry table 1
It is found that finished product thickness value HPThe section at place is [15,20], the setting gap values between rollers S of corresponding the 4th passage of inverseset-4Institute
Section be [30,38], the setting gap values between rollers S of corresponding the 3rd passage of inverseset-3The section at place is [23,30], and institute is right
The setting gap values between rollers S for the 2nd passage of inverse answeredset-2The section at place is [18,24], the setting of corresponding the 1st passage of inverse
Gap values between rollers Sset-1The section at place is [15,20], then the setting gap values between rollers S of the 4th passage reciprocalset-4Calculation formula be：
The setting gap values between rollers S of 3rd passage reciprocalset-3Calculation formula be：
The setting gap values between rollers S of 2nd passage reciprocalset-2Calculation formula be：
The setting gap values between rollers S of 1st passage reciprocalset-1Calculation formula be：
According to the setting gap values between rollers being calculated above, the drafts for 3 passages reciprocal that are ranked.
After completing the rolling of 2nd passage reciprocal, manual measurement plate thickness at this time simultaneously inputs second-level model system,
Assuming that the actual measurement thickness is H after measurementreal-2=17.65 millimeters；Assuming that the actual measurement roll-force of the passage is Freal-2=16000
Thousand Ns.Second-level model system is according to actual measurement plate thickness Hreal-2With the gap values between rollers S of the passageset-2, correct the setting roller of extreme trace time
Seam value Sset-1.Assuming that the first roll gap correction value of extreme trace time is Δ S1, unit is millimeter, then Δ S1Value be：
ΔS1=Hreal-2-Sset-2=17.65-18=-0.35 millimeters
Due to Δ S1When ＜ 0, illustrate the setting roll gap S of extreme trace timeset-1Δ S should be increased1。
Sset-1=15+0.35=15.35 millimeters
Assuming that mill stiffness is thousand Ns/millimeters of M=6000；Assuming that the actual measurement roll-force of rolling extreme trace time is Freal-1, unit
It is thousand Ns；Assuming that the on-line amending value of gap values between rollers is Δ S when rolling extreme trace time2, unit is millimeter；Assuming that when rolling extreme trace time
Have and carries gap values between rollers as Sload-1, S is measured as through position sensorload-1=14.95 millimeters.
When rolling extreme trace time, rolled piece starts timing after entering roll gap, after measuring roll-force 2-4 seconds by rolling force sensor
Obtain actual measurement rolling force Freal-1=14,000 thousand Ns.The actual measurement roll-force of the actual measurement roll-force and the 2nd passage reciprocal is compared
Compared with the computational methods of the on-line amending value of gap values between rollers are when then rolling extreme trace time：
Due to Δ S2When ＜ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be increased2。
Sload-1=14.95+0.33=15.28 millimeters
When basic automation systems complete Δ S2Numerical computations after be immediately controlled milling train hydraulic cylinder action, will have load roller
Seam increases to 15.28 millimeters from 14.95 millimeters.After completion has load roll gap to correct, no longer roll gap is adjusted, until extreme trace
Rolling terminates.Through on-site verification, thickness deviation can control within ± 0.1 millimeter of desired value.
Table 1
Claims (4)
1. the method for controlling thickness of a kind of aluminum and Aluminum Alloy Plate, it is characterised in that include the following steps：
A, according to knowhow, according to alloy species and finished width and finished product thickness, the roll gap of presetting 4 passages reciprocal
It is worth table；When rolling, according to alloy species and finished width and finished product thickness, corresponding 4 reciprocal are obtained from gap values between rollers table
The setting gap values between rollers of passage, the drafts for 3 passages reciprocal that are ranked；
B, according to the setting gap values between rollers of actual measurement plate thickness and the passage after the rolling for completing the 2nd passage reciprocal, extreme trace is corrected
Secondary setting gap values between rollers；
C, when rolling extreme trace time, according to the actual measurement roll-force of this passage, the actual measurement roll-force and mill stiffness of the 2nd passage of inverse,
Gap values between rollers progress on-line amending is carried to having.
2. the method for controlling thickness of aluminum according to claim 1 and Aluminum Alloy Plate, it is characterised in that：Step B
The middle setting gap values between rollers method for correcting extreme trace time is as follows：
After completing the rolling of 2nd passage reciprocal, manual measurement plate thickness at this time simultaneously inputs second-level model system, it is assumed that
The actual measurement plate thickness is Hreal-2, unit is millimeter；Assuming that the actual measurement roll-force of the passage is Freal-2, unit is thousand Ns；Two
Grade model system is according to actual measurement plate thickness Hreal-2With the setting gap values between rollers S of the passageset-2, correct the setting roll gap of extreme trace time
Value Sset-1, it is assumed that the first roll gap correction value of extreme trace time is Δ S1, unit is millimeter, then Δ S1Value be：
ΔS1=Hreal-2-Sset-2
As Δ S1When ＞ 0, illustrate the setting gap values between rollers S of extreme trace timeset-1Δ S should be reduced1；
As Δ S1When ＜ 0, illustrate the setting gap values between rollers S of extreme trace timeset-1Δ S should be increased1。
3. the method for controlling thickness of aluminum according to claim 2 and Aluminum Alloy Plate, it is characterised in that：Step C
In have carry gap values between rollers on-line amending method it is as follows：
Assuming that mill stiffness is M, unit is thousand Ns/millimeter；Assuming that the actual measurement roll-force of rolling extreme trace time is Freal-1, unit is
Thousand Ns；Assuming that the on-line amending value of gap values between rollers is Δ S when rolling extreme trace time2, unit is millimeter；Assuming that having when rolling extreme trace time
Load gap values between rollers are Sload-1, unit is millimeter；
When rolling extreme trace time, rolled piece starts timing after entering roll gap, is obtained after measuring roll-force 2-4 seconds by rolling force sensor
Survey rolling force Freal-1, unit is thousand Ns；The actual measurement roll-force is compared with the actual measurement roll-force of the 2nd passage reciprocal, then
The computational methods of the on-line amending value of gap values between rollers are when rolling extreme trace time：
As Δ S2When ＞ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be reduced2；
As Δ S2When ＜ 0, illustrate that having for extreme trace time carries gap values between rollers Sload-1Δ S should be increased2；
When basic automation systems complete Δ S2Numerical computations after be immediately controlled milling train hydraulic cylinder action, to realize the roll gap
Amendment, completion, which has, to be carried after roll gap corrects, and is no longer adjusted to roll gap, until last passes terminate.
4. the method for controlling thickness of aluminum according to claim 3 and Aluminum Alloy Plate, it is characterised in that：Work as roll gap
When not having corresponding finished product thickness value in value table, 4 roads of inverse corresponding to the finished product thickness value are obtained using linear interpolation method
Secondary setting gap values between rollers；Assuming that the section where the finished product thickness value is [H1,H2], the setting roll gap of corresponding the 4th passage of inverse
Value Sset-4The section at place isThe setting gap values between rollers S of corresponding the 3rd passage of inverseset-3The section at place isThe setting gap values between rollers S of corresponding the 2nd passage of inverseset-2The section at place isIt is corresponding
The 1st passage of inverse setting gap values between rollers Sset-1The section at place isThe then setting gap values between rollers of the 4th passage reciprocal
Sset-4Calculation formula be：
The setting gap values between rollers S of 3rd passage reciprocalset-3Calculation formula be：
The setting gap values between rollers S of 2nd passage reciprocalset-2Calculation formula be：
The setting gap values between rollers S of 1st passage reciprocalset-1Calculation formula be：
Wherein, HpFor finished product thickness value, Hp、H1、H2、 Unit be millimeter.
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| CN104384201A (en) * | 2014-10-13 | 2015-03-04 | 南京钢铁股份有限公司 | Method for preventing great under-pressure distribution change in steel rolling process |
| CN104741388A (en) * | 2015-04-15 | 2015-07-01 | 东北大学 | Method for controlling fine rolling thickness of hot continuous rolling |
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