CN106270001B - A kind of acquisition methods and device of upper row's roller drafts of roll-type stretch bending-straightening machine - Google Patents
A kind of acquisition methods and device of upper row's roller drafts of roll-type stretch bending-straightening machine Download PDFInfo
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- CN106270001B CN106270001B CN201610762577.5A CN201610762577A CN106270001B CN 106270001 B CN106270001 B CN 106270001B CN 201610762577 A CN201610762577 A CN 201610762577A CN 106270001 B CN106270001 B CN 106270001B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention discloses the acquisition methods and device of a kind of upper row's roller drafts of roll-type stretch bending-straightening machine, the local inclination curvature of strip middle layer overstrain and strip at each straightening roll when this method establishes stretch bending by theory analysis, the relational expression of the opposite tensile stress of strip at each straightening roll, then the overstrain of strip at each straightening roll is calculated according to given roll-type stretch-bending straightening technological parameter, go out the elongation percentage of strip by the overstrain accumulation calculating of strip at each straightening roll, calculating is optimized by comparing upper row's roller drafts of elongation percentage calculated value and elongation percentage actual value pair roller type stretch bending-straightening machine.The method of the present invention clear principle is clear, it calculates simple and quick, result of calculation is coincide with field measurement value, can the correctly row's of matching roller drafts and entrance tension roll assembly and outlet tension roll assembly speed difference, so that the available strip elongation percentage of roll-type stretch bending-straightening machine is consistent with practical elongation percentage, prevents strip from skidding.
Description
Technical field
The present invention relates to metallurgical technology more particularly to a kind of acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine
And device.
Background technology
Roll-type stretch bending-straightening machine unit is the key equipment for being connected hot rolling and cold rolling process, with strip aligning and scale breading
Dual function.The unit is mainly by the components group such as two groups of jockey pulleys and the straightening roll being alternately arranged positioned at intermediate two rows
At wherein lower roll is horizontally disposed and position is fixed, and upper row's roller integral inclined can adjust.Fig. 1 is 17 roller stretch bending-straightening machine machines
Group schematic diagram, as shown in Figure 1, strip pass sequentially through entrance tension roll assembly 18, upper and lower 17 straightening rolls (it is wherein upper to arrange 8, roller, under
Arrange 9, roller) and outlet tension roll assembly 19, the common work that the tension and straightening roll 1~17 applied in tension roll assembly 18,19 is bent
With lower completion aligning and scale breading process.
Production practices show to realize that the key of strip aligning and scale breading is to determine reasonably using roll-type stretch bending-straightening machine
The drafts that straightening roll is arranged on roll-type stretch bending-straightening machine, to reach suitable strip elongation percentage.However there is presently no easy to be real
The online computation model of roll-type straightening strip elongation percentage, this to be often required to the pressure by the given upper row's straightening roll of experience
Magnitude, the problem of thus bringing be：It cannot the correct row's of matching roller drafts in roll-type stretch bending-straightening machine unit practical application
With entrance tension roll assembly and the speed difference of tension roll assembly is exported, and strip is made to skid, causes belt steel surface abrade and make with steel plate
Shape deteriorates.This is because when unit inlet tension and outlet tension determine, the available strip of roll-type stretch bending-straightening machine extends
Rate is to be determined by the drafts of upper row's straightening roll, and the practical elongation percentage of strip is by entrance tension roll assembly and outlet tension roll assembly
Speed difference determine, when upper row's straightening roll drafts parameter and entrance tension roll assembly, export the speed difference of tension roll assembly not
The available strip elongation percentage of roll-type stretch bending-straightening machine will be caused to differ larger with practical elongation percentage when can correctly match, at this time band
Steel will skid with respect to straightening roll.
In addition, roll-type stretch bending-straightening machine preferably can not align the function with scale breading by consideration to strip steel in practical application,
It is frequently the problem that strip scale breading effect is fine, but the plate shape of strip is poor after roll-type straightening.This is because wanting
Reach good scale breading effect, larger strip elongation percentage (generally higher than 1%) is needed to realize, and the elongation percentage need to be assigned to
At each straightening roll, if the drafts setting of upper row's roller is unreasonable, each straightening roll cannot well adapt to strip plastic deformation, unfavorable
In improvement belt plate shape, or even belt plate shape can be made to deteriorate.
Therefore it needs further to develop the computation model of upper row's roller drafts of simple and practical roll-type stretch bending-straightening machine,
The application of this pair roller type stretch bending-straightening machine has very important engineering significance.
Invention content
The technical problem to be solved in the present invention is for the defects in the prior art, to provide a kind of roll-type stretch bending-straightening machine
Upper row's roller drafts acquisition methods and device.
The technical solution adopted by the present invention to solve the technical problems is：Under a kind of upper row's roll-in of roll-type stretch bending-straightening machine
The acquisition methods of amount, include the following steps：
(1) roll-type stretch bending-straightening machine technological parameter and strip parameter, the straightener work are obtained from manufacturing plan sheet
Skill parameter includes straightening roll roller number n, aligning roller diameter d (unit mm) and roll spacing t (unit mm), entrance tension roll assembly linear velocity v0
And outlet tension roll assembly linear velocity v1, the strip parameter includes steel grade classification, belt steel thickness h (unit mm), strip width B
(unit mm), strip yield strength σs(units MPa), strip entrance tension T0(unit K N), outlet tension Tn(unit K N) and band
Steel elongation percentage setting value δ；
(2) presetting straightening roll press quantity, specially：Calculate straightening roll maximum reduction lmax(unit mm)；Presetting
The drafts of one upper row's roller (i.e. the 2nd straightening roll)(unit mm) and row's roller (i.e. (n-1)th straightening roll) on the last one
Drafts(unit mm)；
The straightening roll maximum reduction lmaxCalculation formula is：
The drafts of the upper row's roller (i.e. the 2nd straightening roll) of described presetting firstMost
The drafts of roller (i.e. (n-1)th straightening roll) is arranged in the latter
(3) the local inclination curvature K of the 2nd straightening roll strip at (n-1)th straightening roll is calculated successivelyiIt is answered with opposite
Power ξi, wherein i=2,3,4 ..., n-1；
Strip local inclination curvature K at i-th of straightening rolliIt is calculated by following formula：
Wherein, E is the elasticity modulus of strip, units MPa
Strip at i-th of straightening roll is with respect to tensile stress ξiIt is calculated by following formula：
(4) judge whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and phase
The strip overstrain ε at each straightening roll should be calculatedriAnd strip elongation percentage
It is described to judge whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and phase
The strip overstrain ε at each straightening roll should be calculatedri, specially：
If meetingThen illustrate that strip middle layer is state of plastic deformation, the band at the i-th roller
Overstrain ε of the steel after the i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip exists
Flexible deformation, overstrain ε of the strip after the i-th bending are only generated at i-th rollerri=0.
Wherein η is coefficient of intensification, and when strip is carbon steel, value is 0.01~0.03；When strip is steel alloy, value is
0.1~0.25.
(5) judge whether the deviation of elongation percentage calculated value δ ' and elongation percentage setting value δ is less than setting accuracy λ, i.e.,Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then by the 2nd align
Roller moves up certain distanceN is substep hop count, and the position of (n-1)th straightening roll is constant, i.e., the 2nd at this time is rectified
Directly the drafts of roller isThe drafts of (n-1)th straightening roll isM is straightening roll tune
Whole number；Then it is transferred to step (3)；
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by (n-1)th align
Roller moves down certain distanceThe position of 2nd straightening roll is constant, i.e. the drafts of (n-1)th straightening roll at this time
ForThe drafts of 2nd straightening roll isM is the number of straightening roll adjustment；Then
It is transferred to step (3)；
Work as satisfactionThen the strip elongation percentage that is provided by the stretch-bend leveller technological parameter of explanation with by entering
The strip elongation percentage value of mouth outlet tension roll assembly speed difference setting is consistent, therefore meets the pressure of the 2nd straightening roll of condition
Lower amountMeet the drafts of (n-1)th straightening roll of conditionWherein, r is that straightening roll adjusts when meeting condition
Number.
(6) according to the 2nd of the condition that meets the straightening roll press quantity l2With the drafts l of (n-1)th straightening rolln-1Calculate it
The drafts l of its each upper row's rolleri, other each upper row's roller drafts liIt is calculated using following formula：
The present invention also provides a kind of acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine, including：
Parameter acquisition module, for obtaining roll-type stretch bending-straightening machine technological parameter and strip parameter from manufacturing plan sheet,
The flattening machine technological parameter specifically includes straightening roll roller number n, aligning roller diameter d (unit mm) and roll spacing t (unit mm), enters
Mouth tension roll assembly linear velocity v0And outlet tension roll assembly linear velocity v1, it is thick that the strip parameter specifically includes steel grade classification, strip
Spend h (unit mm), strip width B (unit mm), strip yield strength σs(units MPa), strip entrance tension T0(unit K N),
Export tension Tn(unit K N) and strip elongation percentage setting value δ.
Presetting module, for obtaining straightening roll maximum reduction l according to calculatingmax(unit mm) comes presetting first
The drafts of upper row's roller (i.e. the 2nd straightening roll)(unit mm) and roller (i.e. (n-1)th straightening roll) is arranged on the last one
Drafts(unit mm)；
The straightening roll maximum reduction lmaxCalculation formula is：
The drafts of the upper row's roller (i.e. the 2nd straightening roll) of described presetting firstMost
The drafts of roller (i.e. (n-1)th straightening roll) is arranged in the latter
Strip be bent computing module, for successively calculate the 2nd straightening roll at (n-1)th straightening roll strip it is relatively curved
Curvature KiWith opposite tensile stress ξi, i=2,3,4 ..., n-1；
Strip local inclination curvature K at i-th of straightening rolliIt is calculated by following formula：
Wherein, E is the elasticity modulus of strip, unit Mpa；
Strip at i-th of straightening roll is with respect to tensile stress ξiIt is calculated by following formula：
Be plastically deformed judgment module, for judge the 2nd straightening roll at (n-1)th straightening roll strip middle layer whether be
State of plastic deformation, and accordingly calculate the strip overstrain ε at each straightening rollriAnd strip elongation percentage δ ', wherein
Described judges whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and
Accordingly calculate the strip overstrain ε at each straightening rollri, specially：
If meetingThen illustrate that strip middle layer is state of plastic deformation, the band at the i-th roller
Overstrain ε of the steel after the i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip exists
Flexible deformation, overstrain ε of the strip after the i-th bending are only generated at i-th rollerri=0；
Wherein η is coefficient of intensification, and when strip is carbon steel, value is 0.01~0.03；When strip is steel alloy, value is
0.1~0.25.
Whether elongation percentage deviation judgment module, the deviation for judging elongation percentage calculated value δ ' and elongation percentage setting value δ are small
In setting accuracy λ, i.e.,Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then by the 2nd straightening roll
Move up certain distanceN- substep hop counts, the position of (n-1)th straightening roll is constant, i.e. the 2nd straightening roll at this time
Drafts beThe drafts of (n-1)th straightening roll isM is straightening roll adjustment
Number.Then call strip bending computing module recalculate the 2nd straightening roll at (n-1)th straightening roll strip it is relatively curved
Curvature KiWith opposite tensile stress ξi；
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by (n-1)th align
Roller moves down certain distanceThe position of 2nd straightening roll is constant, i.e. the drafts of (n-1)th straightening roll at this time
ForThe drafts of 2nd straightening roll isM is the number of straightening roll adjustment.Then
Strip bending computing module is called to recalculate the local inclination curvature K of the 2nd straightening roll strip at (n-1)th straightening rolli
With opposite tensile stress ξi；
Work as satisfactionThen the strip elongation percentage that is provided by the stretch-bend leveller technological parameter of explanation with by entering
The strip elongation percentage value of mouth outlet tension roll assembly speed difference setting is consistent, therefore meets the pressure of the 2nd straightening roll of condition
Lower amountMeet the drafts of (n-1)th straightening roll of conditionR is time that straightening roll adjusts when meeting condition
Number.
Straightening roll press quantity computing module, for the 2nd straightening roll press quantity l according to the condition that meets2It is rectified with (n-1)th
The drafts l of straight rollern-1Calculate the drafts l of other each upper row's rollersi, other each upper row's roller drafts liUsing following public affairs
Formula calculates：
The beneficial effect comprise that：
Strip middle layer overstrain and band at each straightening roll when 1. the present invention establishes stretch bending by theory analysis
The relational expression of the opposite tensile stress of strip at the local inclination curvature of steel, each straightening roll.It is rectified according to given roll-type stretch bending
Straight technological parameter calculates the overstrain of strip at each straightening roll, is gone out by the overstrain accumulation calculating of strip at each straightening roll
The elongation percentage of strip, by comparing upper row's roller drafts of elongation percentage calculated value and elongation percentage actual value pair roller type stretch bending-straightening machine
Optimize calculating.
2. the method for the present invention calculating is simple and quick, result of calculation is coincide with field measurement value, roll-type stretch bending can be used as to rectify
The on-line setup computation model of upper row's roller drafts of straight machine with the correctly row's of matching roller drafts and entrance tension roll assembly and goes out
The speed difference of mouth tension roll assembly, makes the available strip elongation percentage of roll-type stretch bending-straightening machine be consistent with practical elongation percentage, to prevent
Strip skids.
3. upper row's roller drafts of the roll-type stretch bending-straightening machine obtained using the method for the present invention can be closed strip elongation percentage
Reason is assigned at each straightening roll, good broken to be rapidly achieved before so that the extension of strip is occurred mainly at several straightening rolls
Squama effect, and the aligning of strip is then happened at rear several straightening rolls, therefore the mesh of strip aligning and scale breading can be reached simultaneously
's.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the schematic diagram of 17 roller stretch bending-straightening machines.
Fig. 2 is a kind of flow of the acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine of the embodiment of the present invention
Figure.
Fig. 3 is a kind of structure of the acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine of the embodiment of the present invention
Figure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
Embodiment one：
By taking 17 roller stretching bending straightening machines of certain steel mill as an example, using the method for the present invention to the drafts of each upper row's roller into
Row calculates, and the depressing position of each upper row's roller is then arranged using result of calculation as setting value, and feelings are run by field observation strip
Condition can verify that the accuracy and reliability of the method for the present invention.
Fig. 2 is a kind of stream of the acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine provided in an embodiment of the present invention
Journey specifically includes following steps：
(1) the 17 roller stretch bending-straightening machine parameter and strip parameter of 5 operating modes are obtained from manufacturing plan sheet, wherein
Straightening roll roller number n=17, aligning roller diameter d=110mm, roll spacing t=125mm, steel grade classification is carbon steel, other parameters such as table
Shown in 1.
17 roller stretch bending-straightening machine parameter and strip parameter of 15 operating modes of table
(2) presetting straightening roll press quantity：
Calculate straightening roll maximum reduction lmax=19.4mm；
The drafts of presetting first upper row's roller (i.e. the 2nd straightening roll)And last
The drafts of a upper row's roller (i.e. the 16th straightening roll)
(3) the local inclination curvature K of the 2nd straightening roll strip at the 16th straightening roll is calculatediWith opposite tensile stress ξi, i
=2,3,4 ..., 16；
Strip local inclination curvature K at i-th of straightening rolliIt is calculated by following formula：
Strip at i-th of straightening roll is with respect to tensile stress ξiIt is calculated by following formula：
(4) judge whether the 2nd straightening roll strip middle layer at the 16th straightening roll is state of plastic deformation, and corresponding
Calculate the strip overstrain ε at each straightening rollriAnd strip elongation percentage
If meetingThen illustrate that strip middle layer is state of plastic deformation, the band at the i-th roller
Overstrain ε of the steel after the i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip exists
Flexible deformation, overstrain ε of the strip after the i-th bending are only generated at i-th rollerri=0.
Wherein elastic modulus E is taken as 206000MPa, and coefficient of intensification η is taken as 0.02.
(5) judge whether the deviation of elongation percentage calculated value δ ' and elongation percentage setting value δ is less than setting accuracy 2%, i.e.,Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then by the 2nd align
Roller moves up certain distanceThe position of 16th straightening roll is constant, i.e. the 2nd straightening roll at this time
Drafts beThe drafts of 16th straightening roll isM is the number of straightening roll adjustment.Then
(3) step is transferred to recalculate.
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by the 16th rectify
Straight roller moves down certain distanceThe position of 2nd straightening roll is constant, i.e., the 16th at this time aligning
The drafts of roller isThe drafts of 2nd straightening roll isM is the number of straightening roll adjustment.So
After be transferred to (3) step and recalculate.
Work as satisfactionStrip elongation percentage that then explanation is provided by the stretch-bend leveller technological parameter and by
The strip elongation percentage value of inlet port tension roll assembly speed difference setting is consistent, therefore meet the 2nd straightening roll of condition
DraftsMeet the drafts of the 16th straightening roll of conditionR is time that straightening roll adjusts when meeting condition
Number.
(6) according to the 2nd of the condition that meets the straightening roll press quantity l2With the drafts l of the 16th straightening roll16It calculates other
The drafts l of each upper row's straightening rolli, other each upper row's straightening roll press quantity liIt is calculated using following formula：
Each upper row's roller drafts l of 5 operating modesiCalculated value and corresponding strip elongation percentage calculated value are respectively such as table 2,3 institute of table
Show.
Each upper row's roller drafts l of 25 operating modes of tableiCalculated value
The strip elongation percentage calculated value of 35 operating modes of table is compared with setting value
Through field observation it is found that when using upper row's roller drafts in table 2,5 kinds of operating mode lower band steel capital can operate steadily, nothing
Slipping phenomenon, and strip leveling effect and scale breading effect are all fine, illustrate to be prolonged by the available strip of row's roller drafts on this
It is close to stretch the strip elongation percentage actual value that rate is generated with the speed difference by entrance tension roll assembly and outlet tension roll assembly.And by
Table 3 is it is found that using strip elongation percentage under the calculated each operating mode of the method for the present invention and strip elongation percentage actual value all very close to partially
Difference is illustrated that the method for the present invention result of calculation and actual conditions are identical, is obtained using the method for the present invention each all within 2%
Upper row's roller drafts may be advantageously employed in actual production.
Embodiment two：
Fig. 3 is a kind of knot of the acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine provided in an embodiment of the present invention
Composition.A kind of acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine provided in this embodiment includes：
Parameter acquisition module, for obtaining roll-type stretch bending-straightening machine technological parameter and strip parameter from manufacturing plan sheet,
The flattening machine technological parameter specifically includes straightening roll roller number n, aligning roller diameter d (unit mm) and roll spacing t (unit mm), enters
Mouth tension roll assembly linear velocity v0And outlet tension roll assembly linear velocity v1, it is thick that the strip parameter specifically includes steel grade classification, strip
Spend h (unit mm), strip width B (unit mm), strip yield strength σs(units MPa), strip entrance tension T0(unit K N),
Export tension Tn(unit K N) and strip elongation percentage setting value δ.
Presetting module, for calculating straightening roll maximum reduction lmax(unit mm)；Presetting first upper row's roller is (i.e.
2nd straightening roll) drafts(unit mm) and the drafts that roller (i.e. (n-1)th straightening roll) is arranged on the last one(unit mm)；
The straightening roll maximum reduction lmaxCalculation formula is：
The drafts of the upper row's roller (i.e. the 2nd straightening roll) of described presetting firstWith on the last one
Arrange the drafts of roller (i.e. (n-1)th straightening roll)
Strip be bent computing module, for successively calculate the 2nd straightening roll at (n-1)th straightening roll strip it is relatively curved
Curvature KiWith opposite tensile stress ξi, i=2,3,4 ..., n-1；
Strip local inclination curvature K at i-th of straightening rolliIt is calculated by following formula：
Wherein, E is the elasticity modulus of strip, units MPa
Strip at i-th of straightening roll is with respect to tensile stress ξiIt is calculated by following formula：
Be plastically deformed judgment module, for judge the 2nd straightening roll at (n-1)th straightening roll strip middle layer whether be
State of plastic deformation, and accordingly calculate the strip overstrain ε at each straightening rollriAnd strip elongation percentage
Described judges whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and
Accordingly calculate the strip overstrain ε at each straightening rollri, specially：
If meetingThen illustrate that strip middle layer is state of plastic deformation, the band at the i-th roller
Overstrain ε of the steel after the i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip exists
Flexible deformation, overstrain ε of the strip after the i-th bending are only generated at i-th rollerri=0.
Wherein η is coefficient of intensification, and when strip is carbon steel, value is 0.01~0.03；When strip is steel alloy, value is
0.1~0.25.
Whether elongation percentage deviation judgment module, the deviation for judging elongation percentage calculated value δ ' and elongation percentage setting value δ are small
In setting accuracy λ, i.e.,Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then by the 2nd straightening roll
Move up certain distanceN- substep hop counts, the position of (n-1)th straightening roll is constant, i.e. the 2nd straightening roll at this time
Drafts beThe drafts of (n-1)th straightening roll isM is straightening roll adjustment
Number.Then call strip bending computing module recalculate the 2nd straightening roll at (n-1)th straightening roll strip it is relatively curved
Curvature KiWith opposite tensile stress ξi。
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by (n-1)th align
Roller moves down certain distanceThe position of 2nd straightening roll is constant, i.e. the drafts of (n-1)th straightening roll at this time
ForThe drafts of 2nd straightening roll isM is the number of straightening roll adjustment.Then
Strip bending computing module is called to recalculate the local inclination curvature K of the 2nd straightening roll strip at (n-1)th straightening rolli
With opposite tensile stress ξi。
Work as satisfactionThen the strip elongation percentage that is provided by the stretch-bend leveller technological parameter of explanation with by entering
The strip elongation percentage value of mouth outlet tension roll assembly speed difference setting is consistent, therefore meets the pressure of the 2nd straightening roll of condition
Lower amountMeet the drafts of (n-1)th straightening roll of conditionR is time that straightening roll adjusts when meeting condition
Number.
Straightening roll press quantity computing module, for the 2nd straightening roll press quantity l according to the condition that meets2It is rectified with (n-1)th
The drafts l of straight rollern-1Calculate the drafts l of other each upper row's straightening rollsi, other each upper row's straightening roll press quantity liIt adopts
It is calculated with following formula：
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (6)
1. a kind of acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine, which is characterized in that include the following steps：
1) roll-type stretch bending-straightening machine technological parameter and strip parameter, the roll-type stretch bending-straightening machine are obtained from manufacturing plan sheet
Technological parameter includes straightening roll roller number n, aligning roller diameter d and roll spacing t, entrance tension roll assembly linear velocity v0And outlet tension roll assembly
Linear velocity v1, the strip parameter includes steel grade classification, belt steel thickness h, strip width B, strip yield strength σs, strip enters
Mouth tension T0, outlet tension TnAnd strip elongation percentage setting value δ；
2) presetting straightening roll press quantity, specially：Calculate straightening roll maximum reduction lmax；The pressure of presetting 2nd straightening roll
Lower amountWith the drafts of (n-1)th straightening roll
3) the local inclination curvature K of the 2nd straightening roll strip at (n-1)th straightening roll is calculated successivelyiWith opposite tensile stress ξi,
Wherein, i=2,3,4 ..., n-1；
The local inclination curvature K of strip at i-th of straightening rolliIt is calculated by following formula：
Wherein, E is the elasticity modulus of strip,
The opposite tensile stress ξ of strip at i-th of straightening rolliIt is calculated by following formula：
4) judge whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and accordingly calculate
Strip overstrain ε at each straightening rollriAnd strip elongation percentage δ ', wherein
It is described to judge whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation and mutually accrued
Calculate the strip overstrain ε at each straightening rollri, specially：
If meetingThen illustrate that strip middle layer is state of plastic deformation, strip warp at the i-th roller
Overstrain ε after i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip is in the i-th roller
Place only generates flexible deformation, overstrain ε of the strip after the i-th bendingri=0；
Wherein η is coefficient of intensification；
(5) judge whether the deviation of elongation percentage calculated value δ ' and elongation percentage setting value δ is less than setting accuracy λ, i.e.,
Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then it is the 2nd straightening roll is upward
It moves a certain distanceN is substep hop count, and the position of (n-1)th straightening roll is constant, is then transferred to step (3)；
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by (n-1)th straightening roll to
Under move a certain distanceThe position of 2nd straightening roll is constant, is then transferred to step (3)；
Work as satisfactionThe strip elongation percentage that then explanation is provided by the stretch-bend leveller technological parameter goes out with by entrance
The strip elongation percentage value of mouth tension roll assembly speed difference setting is consistent, therefore meets the drafts of the 2nd straightening roll of conditionMeet the drafts of (n-1)th straightening roll of conditionWherein, r is time that straightening roll adjusts when meeting condition
Number；
(6) according to the 2nd of the condition that meets the straightening roll press quantity l2With the drafts l of (n-1)th straightening rolln-1Calculate it is other it is each on
Arrange the drafts l of rolleri, other each upper row's roller drafts liIt is calculated using following formula：
2. the acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine according to claim 1, which is characterized in that institute
It states in the presetting straightening roll press quantity of step 2), straightening roll maximum reduction lmaxCalculation formula is：
The drafts of presetting 2nd straightening rollSetting range is (0.7~0.9) lmax, the pressure of (n-1)th straightening roll
Lower amountIt is 0.
3. the acquisition methods of upper row's roller drafts of roll-type stretch bending-straightening machine according to claim 1, which is characterized in that institute
It is coefficient of intensification to state η in step 4), and when strip is carbon steel, value is 0.01~0.03；When strip is steel alloy, value is
0.1~0.25.
4. a kind of acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine, which is characterized in that including：
Parameter acquisition module, it is described for obtaining roll-type stretch bending-straightening machine technological parameter and strip parameter from manufacturing plan sheet
Roll-type stretch bending-straightening machine technological parameter includes straightening roll roller number n, aligning roller diameter d and roll spacing t, entrance tension roll assembly linear velocity v0
And outlet tension roll assembly linear velocity v1, the strip parameter include steel grade classification, belt steel thickness h, strip width B, strip bend
Take intensity σs, strip entrance tension T0, outlet tension TnAnd strip elongation percentage setting value δ；
Presetting module, for obtaining straightening roll maximum reduction l according to calculatingmaxCarry out the drafts of presetting 2nd straightening roll
With the drafts of (n-1)th straightening roll；
Strip is bent computing module, and the local inclination for calculating the 2nd straightening roll strip at (n-1)th straightening roll successively is bent
Rate KiWith opposite tensile stress ξi, i=2,3,4 ..., n-1；
The local inclination curvature K of strip at i-th of straightening rolliIt is calculated by following formula：
Wherein, E is the elasticity modulus of strip；
The opposite tensile stress ξ of strip at i-th of straightening rolliIt is calculated by following formula：
It is plastically deformed judgment module, for judging whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is plasticity
Deformation state, and accordingly calculate the strip overstrain ε at each straightening rollriAnd strip elongation percentage δ ', wherein
Described judges whether the 2nd straightening roll strip middle layer at (n-1)th straightening roll is state of plastic deformation, and corresponding
Calculate the strip overstrain ε at each straightening rollri, specially：
If meetingThen illustrate that strip middle layer is state of plastic deformation, strip warp at the i-th roller
Overstrain ε after i-th bendingriCalculation formula be：
If meetingThen illustrate that strip middle layer is not state of plastic deformation at the i-th roller, strip is in the i-th roller
Place only generates flexible deformation, overstrain ε of the strip after the i-th bendingri=0；
Wherein η is coefficient of intensification；
Elongation percentage deviation judgment module is set for judging whether the deviation of elongation percentage calculated value δ ' and elongation percentage setting value δ are less than
Determine precision λ, i.e.,Specifically：
When being unsatisfactory forAnd elongation percentage calculated value δ ' be more than elongation percentage setting value δ when, then it is the 2nd straightening roll is upward
It moves a certain distanceN- substep hop counts, the position of (n-1)th straightening roll is constant, i.e. the pressure of the 2nd straightening roll at this time
Lower amount isThe drafts of (n-1)th straightening roll isM is time of straightening roll adjustment
Number；Then strip bending computing module is called to recalculate the local inclination of the 2nd straightening roll strip at (n-1)th straightening roll
Curvature KiWith opposite tensile stress ξi；
When being unsatisfactory forAnd elongation percentage calculated value δ ' be less than elongation percentage setting value δ when, then by (n-1)th straightening roll to
Under move a certain distanceThe position of 2nd straightening roll is constant, i.e., the drafts of (n-1)th straightening roll is at this timeThe drafts of 2nd straightening roll isM is the number of straightening roll adjustment；Then it adjusts
The local inclination curvature K of the 2nd straightening roll strip at (n-1)th straightening roll is recalculated with strip bending computing moduleiWith
Opposite tensile stress ξi；
Work as satisfactionThe strip elongation percentage that then explanation is provided by the stretch-bend leveller technological parameter goes out with by entrance
The strip elongation percentage value of mouth tension roll assembly speed difference setting is consistent, therefore meets the drafts of the 2nd straightening roll of conditionMeet the drafts of (n-1)th straightening roll of conditionR is the number that straightening roll adjusts when meeting condition；
Straightening roll press quantity computing module, for the 2nd straightening roll press quantity l according to the condition that meets2With (n-1)th straightening roll
Drafts ln-1Calculate the drafts l of other each upper row's rollersi, other each upper row's roller drafts liUsing following formula meter
It calculates：
5. the acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine according to claim 4, which is characterized in that institute
It states in presetting module, straightening roll maximum reduction lmaxCalculation formula is：
The drafts of presetting 2nd straightening rollSetting range is (0.7~0.9) lmax, the pressure of (n-1)th straightening roll
Lower amountIt is 0.
6. the acquisition device of upper row's roller drafts of roll-type stretch bending-straightening machine according to claim 4, which is characterized in that institute
It is coefficient of intensification to state η in plastic deformation judgment module, and when strip is carbon steel, value is 0.01~0.03；When strip is steel alloy
When value be 0.1~0.25.
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| CN106694637B (en) * | 2016-12-06 | 2018-07-31 | 武汉钢铁有限公司 | A kind of automatic flattening method of high-yield strength low-alloy steel |
| CN108500083B (en) * | 2018-03-09 | 2019-10-15 | 太原科技大学 | The more stock board product roll leveller processing parameter setting methods of small lot |
| CN108889835A (en) * | 2018-05-08 | 2018-11-27 | 苏州言晴信息科技有限公司 | A kind of metal material digital-control processing system |
| CN109299541B (en) * | 2018-09-25 | 2023-06-16 | 首钢集团有限公司 | Strip steel withdrawal and straightening processing method and device |
| CN112588837B (en) * | 2020-11-27 | 2022-10-11 | 日照宝华新材料有限公司 | System and method for automatically identifying pressing-down of roll box of scale breaking withdrawal and straightening machine |
| CN113877987B (en) * | 2021-09-01 | 2022-11-29 | 中国重型机械研究院股份公司 | Method for presetting working parameters of roller type straightening machine |
| CN113680850B (en) * | 2021-09-24 | 2023-04-07 | 中冶赛迪工程技术股份有限公司 | Method for setting rolling reduction of straightener |
| CN113941620B (en) * | 2021-10-14 | 2023-11-21 | 中冶南方工程技术有限公司 | Method for setting pressing schedule of parallel roller system integral adjustment type straightener |
| CN114101385B (en) * | 2021-10-29 | 2023-12-19 | 中冶赛迪工程技术股份有限公司 | Calculation method for elongation and tension loss of strip steel withdrawal and crack risk assessment method |
| CN113857297B (en) * | 2021-11-01 | 2023-12-15 | 中冶赛迪工程技术股份有限公司 | Straightening machine plate shape control method and system |
| CN114798752B (en) * | 2022-04-12 | 2024-05-10 | 首钢京唐钢铁联合有限责任公司 | Strip steel and plate roller slip judging method and device based on double-rack leveling machine |
| CN115430728A (en) * | 2022-09-13 | 2022-12-06 | 广西广盛新材料科技有限公司 | Steel plate straightening method and straightening device |
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| CN101716604B (en) * | 2009-12-17 | 2012-06-13 | 燕山大学 | Forecasting method of rolling pressure and roll gap pressure of DC rolling mill |
| CN104001739B (en) * | 2014-05-14 | 2015-12-09 | 中冶南方工程技术有限公司 | A kind of acquisition methods of cold rolling levelling draught pressure and device |
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