CN102784814A - Roll bending compensation method for wide and thick metal plates straightening machine - Google Patents

Roll bending compensation method for wide and thick metal plates straightening machine Download PDF

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CN102784814A
CN102784814A CN2011101299252A CN201110129925A CN102784814A CN 102784814 A CN102784814 A CN 102784814A CN 2011101299252 A CN2011101299252 A CN 2011101299252A CN 201110129925 A CN201110129925 A CN 201110129925A CN 102784814 A CN102784814 A CN 102784814A
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deflection
straightener
amount
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CN102784814B (en
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王英杰
王英睿
李山青
刘飞
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Baoshan Iron and Steel Co Ltd
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Abstract

The invention relates to the field of controlling straightened plate shape of metal plates, and particularly relates to a method for controlling the straightened roll gap shape of multiple rolls of the wide and thick metal plates. A roll bending compensation method for wide and thick metal plates straightening machine comprises the following steps of: firstly determining a deflection model of a beam of the straightening machine, then collecting parameters of the straightened metal plates, calculating to obtain a deflection of an initial upper beam and a deflection of an initial lower beam, and increasing corresponding compensation in a bending roll model for compensation; acquiring oil pressure through an oil pressure sensor, calculating to obtain measured values of the parameters, calculating differential values of the parameters and calculating to obtain a modified value of the deflection of the upper beam and a modified value of the deflection of the lower beam respectively by combining the parameters of the upper beam and the lower beam, and increasing the corresponding compensation in the bending roll model for compensation. According to the invention, corresponding modification control is increased in a control system of the straightening machine, the change of the on-load roll gap of the straightening machine is determined, so that the roll gap control of the straightening machine is not affected by the change of the state of the supplied materials, so that the index of the straightened plate shape is guaranteed, and the straightening effect is effectively improved.

Description

Wide thick metal sheet straightener Bending compensation method
Technical field
The present invention relates to the roll gap shape control method in the Strip Shape Control field of sheet metal aligning, more particularly to a kind of wide thick metal sheet multiple roll aligning.
Background technology
The aligning of wide thick metal sheet, typically using multi-roll straightening machine., can be using the aligning pattern such as 5 rollers, 7 rollers, 9 rollers, 11 rollers by taking the Wide and Thick Slab of steel matter as an example.No matter aligning is completed in which way, it is all to reach aligning purpose by alternating bending of the Wide and Thick Slab in straightener roll gap to search to the bottom, that is, sheet metal is straight after aligning.It follows that straightener is by eliminating Wide and Thick Slab internal residual stress and reaching improves the purpose of plate shape, rather than plate shape improved by obvious change in size.
At present, plate straightening roll design uses multiple roll pattern in the world, as shown in figure 1, realizing alternating bending to reach the purpose of straightening steel plate in the roll gap that two rows smoothing roll 2 is constituted by sheet metal 1.In the actual Strip Shape Control of steel plates straightening, roller, swing, inclination, single roller position adjustment etc. are all effective Strip Shape Control means, Strip Shape Control means are as requested, change steel plate diverse location, the degree of crook of different phase, so as to adjust the extension of steel plate after roll gap and aligning.
For Wide and Thick Slab straightening process, steel plate deformed causes straightener to produce amount of deflection, changes aligning roll gap, negative curved equivalent to being applied with straightening process to steel plate, has a strong impact on the leveling effect of steel plate, especially in the case where straightening force produces fluctuation.In the prior art typically using fixed positive roller amount compensation straightener deformation, the determination of wherein compensation rate is precalculated by considerably complicated finite element method, and the calculating time is longer, and Mobile state compensation is not entered in the actual roll gap change in straightening process.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of wide thick metal sheet straightener Bending compensation method, make the gap preset of cold straightener and are not influenceed by supplied materials state change, so as to ensure the plate shape index after aligning, effectively increase leveling effect.
What the present invention was realized in：A kind of wide thick metal sheet straightener Bending compensation method, comprises the following steps：
Step 1: determining the crossbeam amount of deflection model of straightener, first measurement obtains the crossbeam parameter of straightener, then according to the computational methods of beam deflection in the mechanics of materials, obtains the crossbeam amount of deflection model such as formula 1,
            (1)
In formula,
Figure 915339DEST_PATH_IMAGE002
For crossbeam amount of deflection；
Figure 2011101299252100002DEST_PATH_IMAGE003
For penalty coefficient, obtained by experience；
Figure 928556DEST_PATH_IMAGE004
For support reaction
Figure 2011101299252100002DEST_PATH_IMAGE005
Produced amount of deflection；
Figure 360675DEST_PATH_IMAGE006
For close to the hydraulic cylinder bending roller force at straightener center
Figure 2011101299252100002DEST_PATH_IMAGE007
The amount of deflection of generation；
Figure 939686DEST_PATH_IMAGE008
For the hydraulic cylinder bending roller force away from straightener center
Figure 2011101299252100002DEST_PATH_IMAGE009
The amount of deflection of generation；
Figure 861374DEST_PATH_IMAGE010
For straightening force
Figure DEST_PATH_IMAGE011
Produced amount of deflection；
Step 2: collecting the parameter for being straightened sheet metal, straightening force setting value is calculated according to the on-time model that the parameter for being straightened sheet metal is carried using machine
Figure 96309DEST_PATH_IMAGE012
, support reaction setting value
Figure DEST_PATH_IMAGE013
, close to straightener center hydraulic cylinder bending roller force setting value
Figure 394435DEST_PATH_IMAGE014
With the hydraulic cylinder bending roller force setting value away from straightener center
Figure DEST_PATH_IMAGE015
, and initial entablature amount of deflection is obtained according to the calculating of formula 1
Figure 25356DEST_PATH_IMAGE016
With initial sill amount of deflection
Figure DEST_PATH_IMAGE017
, increase corresponding compensation rate in roller model and compensate；
Straightening force measured value is obtained Step 3: obtaining oil pressure by oil pressure sensor and calculating
Figure 117945DEST_PATH_IMAGE018
, support reaction measured value
Figure DEST_PATH_IMAGE019
, close to straightener center hydraulic cylinder bending roller force measured value
Figure 840176DEST_PATH_IMAGE020
With the hydraulic cylinder bending roller force measured value away from straightener center
Figure DEST_PATH_IMAGE021
；
Setting value and the difference of measured value are obtained Step 4: calculating, difference formula 1 is substituted into, and entablature deflection correction value is obtained respectively in connection with the parameter calculating of upper and lower crossbeamWith sill deflection correction value
Figure DEST_PATH_IMAGE023
, increase corresponding correction in roller model and compensate.
In the step one, penalty coefficient
Figure 167700DEST_PATH_IMAGE003
Span be 1.15 ~ 1.5.
The compensation method also include setting roll gap compensation model, set roll gap compensation model as
Figure 244241DEST_PATH_IMAGE024
, g is roll gap deflection compensation value,For entablature amount of deflection,
Figure 952303DEST_PATH_IMAGE026
For sill amount of deflection,
Figure DEST_PATH_IMAGE027
For regulation coefficient, obtained by experience；Up and down roller be symmetrical roller, then have above and below Bending compensation amount be respectively
Figure 828117DEST_PATH_IMAGE028
。
Described regulation coefficient
Figure 341DEST_PATH_IMAGE027
Span be 1 ~ 1.3. 
Wide thick metal sheet straightener Bending compensation method calculates obtained straightening force to straightener distorted pattern and process modeling first in the present invention, determines there is the situation of change for carrying roll gap during steel plates straightening, and increases in roller model corresponding compensation rate；Then according to the fluctuation of actual straightening power, straightener distorted pattern is combined again, increase corresponding Correction and Control in the straightener control system, straightener, which is determined, the change for carrying roll gap, make the gap preset of straightener is not influenceed by supplied materials state change, so as to ensure the plate shape index after aligning, leveling effect is effectively increased.
Brief description of the drawings
Fig. 1 is that sheet metal straightener aligns schematic diagram；
Fig. 2 is sheet metal straightener structure schematic diagram；
Fig. 3 is the upper, lower horizontal beam stress schematic diagram of straightener；
Fig. 4 is the entablature rough schematic view of straightener；
Fig. 5 is the sill rough schematic view of straightener.
In figure：1 sheet metal, 2 smoothing rolls, 3 frames, 4 roller systems, 5 Cam devices, 6 pressure frames, 7 entablatures, 8 sills.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that after the content of the invention stated has been read, those skilled in the art can make various changes or modifications to the present invention, these equivalent form of values equally fall within the application appended claims limited range.
Embodiment 1
Sheet metal is born after straightening force on straightener, and straightener certainly will be deformed, and this deformation is referred to as straightener amount of deflection.As shown in Fig. 2 when not considering frame 3, straightener structure can be divided into above and below two parts, its part for bearing straightening force includes roller system 4, Cam device 5, pressure frame 6, entablature 7 and the sill 8 being made up of working roll and backing roll.Required in view of each several part concrete function and structure type, entablature 7 and sill 8 are subject to the final part of straightening force in this system, because its rigidity is much larger than other parts, therefore roll gap amount of deflection main component is the amount of deflection of entablature 7 and sill 8.
A kind of wide thick metal sheet straightener Bending compensation method, comprises the following steps：
Step 1: determining the crossbeam amount of deflection model of straightener, first measurement obtains the crossbeam parameter of straightener, then according to the computational methods of beam deflection in the mechanics of materials, obtains the crossbeam amount of deflection model such as formula 1,
Figure 953776DEST_PATH_IMAGE001
            (1)
In formula,
Figure 962184DEST_PATH_IMAGE002
For crossbeam amount of deflection；
Figure 202541DEST_PATH_IMAGE003
For penalty coefficient,
Figure 980004DEST_PATH_IMAGE003
Obtained by experience,
Figure 149080DEST_PATH_IMAGE003
Span be 1.15 ~ 1.5；
Figure 379204DEST_PATH_IMAGE004
For support reaction
Figure 423252DEST_PATH_IMAGE005
Produced amount of deflection,；
For close to the hydraulic cylinder bending roller force at straightener centerThe amount of deflection of generation,
Figure 565149DEST_PATH_IMAGE030
；
Figure 898041DEST_PATH_IMAGE008
For the hydraulic cylinder bending roller force away from straightener center
Figure 135250DEST_PATH_IMAGE009
The amount of deflection of generation,；
Figure 347925DEST_PATH_IMAGE010
For straightening force
Figure 552641DEST_PATH_IMAGE011
Produced amount of deflection,
Figure 558732DEST_PATH_IMAGE011
It is considered as uniform load,
Then
Figure 588130DEST_PATH_IMAGE032
；
As shown in Fig. 3,4,5, in above parameter,
I is the average inertia square of crossbeam,
Figure DEST_PATH_IMAGE033
B is the width of straightener crossbeam；
H is straightener crossbeam total height；
H is the beam height at support reaction active position；
L1For the length of crossbeam variable cross-section part；
L2For the length of crossbeam maximum cross-section part；
F is support reaction；
Fw1For the bending roller force produced by the hydraulic cylinder at straightener center；
Fw2The bending roller force produced for the hydraulic cylinder away from straightener center；
P is straightening force；
Lw1For distance of the inner side roller point of force application away from straightener center line；
Lw2For distance of the outside roller point of force application away from straightener center line；
B is the width of sheet metal；
E is the elastic modelling quantity of sheet metal；
Step 2: collecting the parameter for being straightened sheet metal, include length, width and the thickness of sheet metal, the elastic modelling quantity of sheet metal；The on-time model that parameter according to sheet metal is straightened is carried using machine calculates straightening force setting value
Figure 971707DEST_PATH_IMAGE012
, support reaction setting value
Figure 726036DEST_PATH_IMAGE013
, close to straightener center hydraulic cylinder bending roller force setting value
Figure 400731DEST_PATH_IMAGE014
With the hydraulic cylinder bending roller force setting value away from straightener center, and initial entablature amount of deflection is obtained according to the calculating of formula 1
Figure 167010DEST_PATH_IMAGE016
With initial sill amount of deflection
Figure 80739DEST_PATH_IMAGE017
, increase corresponding compensation rate in roller model and compensate；Set roll gap compensation model as；In the present embodiment, roller is symmetrical roller above and below straightener,
Figure 891011DEST_PATH_IMAGE034
, then have above and below roller initial compensation amount be respectively。
Figure 33368DEST_PATH_IMAGE036
For roll gap deflection compensation value,
For entablature amount of deflection,
Figure 965738DEST_PATH_IMAGE026
For sill amount of deflection,
Figure DEST_PATH_IMAGE037
For initial roll gap deflection compensation value,
Figure 89814DEST_PATH_IMAGE027
For regulation coefficient, obtained by experience,
Figure 533564DEST_PATH_IMAGE038
；
Straightening force measured value is obtained Step 3: obtaining oil pressure by oil pressure sensor and calculating
Figure 500515DEST_PATH_IMAGE018
, support reaction measured value, close to straightener center hydraulic cylinder bending roller force measured value
Figure 860138DEST_PATH_IMAGE020
With the hydraulic cylinder bending roller force measured value away from straightener center
Figure 491101DEST_PATH_IMAGE021
；
In formula,
Figure 53670DEST_PATH_IMAGE040
Close to the hydraulic cylinder oil pressure at straightener center, to be obtained by oil pressure sensor；
Figure DEST_PATH_IMAGE041
For close to the hydraulic cylinder piston area at straightener center；
Figure 94526DEST_PATH_IMAGE042
In formula,For the hydraulic cylinder oil pressure away from straightener center, obtained by oil pressure sensor；
Figure 504779DEST_PATH_IMAGE044
For the hydraulic cylinder piston area away from straightener center；
Figure DEST_PATH_IMAGE045
In formula,For one side pressure cylinder oil power, obtained by oil pressure sensor；
      
Figure DEST_PATH_IMAGE047
For pressure oil cylinder piston area.
Figure 28612DEST_PATH_IMAGE048
Setting value and the difference of measured value are obtained Step 4: calculating,
Figure DEST_PATH_IMAGE049
,
Figure 377554DEST_PATH_IMAGE050
,,
Figure 330729DEST_PATH_IMAGE052
,
Will
Figure DEST_PATH_IMAGE053
、
Figure 739713DEST_PATH_IMAGE054
、、
Figure 778339DEST_PATH_IMAGE056
Formula 1 is substituted into, and entablature deflection correction value is obtained respectively in connection with the parameter calculating of upper and lower crossbeam
Figure 727709DEST_PATH_IMAGE022
With sill deflection correction value
Figure 846975DEST_PATH_IMAGE023
, increase corresponding correction in roller model and compensate.
Set roll gap compensation model as
Figure 8221DEST_PATH_IMAGE024
；In the present embodiment, it is contemplated that roller is symmetrical roller above and below straightener,
Figure DEST_PATH_IMAGE057
, then have above and below roller correction-compensation amount be respectively
Figure 32677DEST_PATH_IMAGE058
。
Figure 536471DEST_PATH_IMAGE036
For roll gap deflection compensation value,
Figure 260976DEST_PATH_IMAGE025
For entablature amount of deflection,
Figure 824812DEST_PATH_IMAGE026
For sill amount of deflection,
Figure DEST_PATH_IMAGE059
For roll gap deflection correction value,
Figure 336565DEST_PATH_IMAGE027
For regulation coefficient, obtained by experience,。

Claims (4)

1. a kind of wide thick metal sheet straightener Bending compensation method, it is characterized in that, comprise the following steps：
Step 1: determining the crossbeam amount of deflection model of straightener, first measurement obtains the crossbeam parameter of straightener, then according to the computational methods of beam deflection in the mechanics of materials, obtains the crossbeam amount of deflection model such as formula 1,
Figure 2011101299252100001DEST_PATH_IMAGE002
            (1)
In formula,For crossbeam amount of deflection；
For penalty coefficient,
Figure 875027DEST_PATH_IMAGE006
Obtained by experience；
Figure DEST_PATH_IMAGE008
For support reactionProduced amount of deflection；
Figure DEST_PATH_IMAGE012
For close to the hydraulic cylinder bending roller force at straightener center
Figure DEST_PATH_IMAGE014
The amount of deflection of generation；
Figure DEST_PATH_IMAGE016
For the hydraulic cylinder bending roller force away from straightener center
Figure DEST_PATH_IMAGE018
The amount of deflection of generation；
Figure DEST_PATH_IMAGE020
For straightening force
Figure DEST_PATH_IMAGE022
Produced amount of deflection；
Step 2: collecting the parameter for being straightened sheet metal, straightening force setting value is calculated according to the on-time model that the parameter for being straightened sheet metal is carried using machine
Figure DEST_PATH_IMAGE024
, support reaction setting value
Figure DEST_PATH_IMAGE026
, close to straightener center hydraulic cylinder bending roller force setting value
Figure DEST_PATH_IMAGE028
With the hydraulic cylinder bending roller force setting value away from straightener center
Figure DEST_PATH_IMAGE030
, and initial entablature amount of deflection is obtained according to the calculating of formula 1
Figure DEST_PATH_IMAGE032
With initial sill amount of deflection
Figure DEST_PATH_IMAGE034
, increase corresponding compensation rate in roller model and compensate；
Straightening force measured value is obtained Step 3: obtaining oil pressure by oil pressure sensor and calculating
Figure DEST_PATH_IMAGE036
, support reaction measured value, close to straightener center hydraulic cylinder bending roller force measured value
Figure DEST_PATH_IMAGE040
With the hydraulic cylinder bending roller force measured value away from straightener center；
Setting value and the difference of measured value are obtained Step 4: calculating, difference formula 1 is substituted into, and entablature deflection correction value is obtained respectively in connection with the parameter calculating of upper and lower crossbeam
Figure DEST_PATH_IMAGE044
With sill deflection correction value
Figure DEST_PATH_IMAGE046
, increase corresponding correction in roller model and compensate.
2. wide thick metal sheet straightener Bending compensation method as claimed in claim 1, it is characterized in that：In the step one, penalty coefficient
Figure 183647DEST_PATH_IMAGE006
Span be 1.15 ~ 1.5.
3. wide thick metal sheet straightener Bending compensation method as claimed in claim 1 or 2, it is characterized in that：The compensation method also include setting roll gap compensation model, set roll gap compensation model as
Figure DEST_PATH_IMAGE048
, g is roll gap deflection compensation value,
Figure DEST_PATH_IMAGE050
For entablature amount of deflection,
Figure DEST_PATH_IMAGE052
For sill amount of deflection,
Figure DEST_PATH_IMAGE054
For regulation coefficient, obtained by experience；Up and down roller be symmetrical roller, then have above and below Bending compensation amount be respectively
Figure DEST_PATH_IMAGE056
。
4. wide thick metal sheet straightener Bending compensation method as claimed in claim 3, it is characterized in that：Described regulation coefficient
Figure 838750DEST_PATH_IMAGE054
Span be 1 ~ 1.3.
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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN109726451A (en) * 2018-12-12 2019-05-07 中国航空工业集团公司西安飞机设计研究所 Clamped condition lower wall panels bear well-distributed pressure center equivalent stress appraisal procedure
CN109967558A (en) * 2019-03-19 2019-07-05 浙江申吉钛业股份有限公司 With the method for aligning with front end roll-up device for improving titanium alloy plate flattening precision
CN110402172A (en) * 2017-03-13 2019-11-01 Sms集团有限公司 For running the method and roll leveller of roll leveller
CN111633057A (en) * 2020-05-14 2020-09-08 太原科技大学 Left-right tilting dynamic straightening method
CN112231955A (en) * 2020-10-15 2021-01-15 燕山大学 Turnout steel rail transverse top bending method considering top pick action surface
CN112371768A (en) * 2020-09-14 2021-02-19 太原科技大学 Steel pipe straightening machine with measurable frame vertical column pretightening force
CN113488181A (en) * 2021-08-16 2021-10-08 郑州铁路职业技术学院 Method for calculating lateral bending correction force of spine
CN113857295A (en) * 2021-09-03 2021-12-31 中冶赛迪工程技术股份有限公司 Method for setting bending force of straightening machine
CN114273463A (en) * 2020-09-27 2022-04-05 宝山钢铁股份有限公司 Automatic multi-pass straightening method for steel plate

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110402172A (en) * 2017-03-13 2019-11-01 Sms集团有限公司 For running the method and roll leveller of roll leveller
CN109726451A (en) * 2018-12-12 2019-05-07 中国航空工业集团公司西安飞机设计研究所 Clamped condition lower wall panels bear well-distributed pressure center equivalent stress appraisal procedure
CN109726451B (en) * 2018-12-12 2023-01-13 中国航空工业集团公司西安飞机设计研究所 Method for evaluating equivalent stress of uniformly distributed pressure center borne by wall plate under solid support condition
CN109967558A (en) * 2019-03-19 2019-07-05 浙江申吉钛业股份有限公司 With the method for aligning with front end roll-up device for improving titanium alloy plate flattening precision
CN111633057B (en) * 2020-05-14 2022-05-31 太原科技大学 Left-right tilting dynamic straightening method
CN111633057A (en) * 2020-05-14 2020-09-08 太原科技大学 Left-right tilting dynamic straightening method
CN112371768A (en) * 2020-09-14 2021-02-19 太原科技大学 Steel pipe straightening machine with measurable frame vertical column pretightening force
CN114273463A (en) * 2020-09-27 2022-04-05 宝山钢铁股份有限公司 Automatic multi-pass straightening method for steel plate
CN114273463B (en) * 2020-09-27 2024-03-08 宝山钢铁股份有限公司 Automatic multi-pass straightening method for steel plate
CN112231955A (en) * 2020-10-15 2021-01-15 燕山大学 Turnout steel rail transverse top bending method considering top pick action surface
CN112231955B (en) * 2020-10-15 2023-03-31 燕山大学 Turnout steel rail transverse top bending method considering top pick action surface
CN113488181A (en) * 2021-08-16 2021-10-08 郑州铁路职业技术学院 Method for calculating lateral bending correction force of spine
CN113857295A (en) * 2021-09-03 2021-12-31 中冶赛迪工程技术股份有限公司 Method for setting bending force of straightening machine
CN113857295B (en) * 2021-09-03 2023-12-05 中冶赛迪工程技术股份有限公司 Setting method for bending force of straightener

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