CN102063084A - Roll bending normalization setting method for roll straightening machine - Google Patents

Roll bending normalization setting method for roll straightening machine Download PDF

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CN102063084A
CN102063084A CN200910201816XA CN200910201816A CN102063084A CN 102063084 A CN102063084 A CN 102063084A CN 200910201816X A CN200910201816X A CN 200910201816XA CN 200910201816 A CN200910201816 A CN 200910201816A CN 102063084 A CN102063084 A CN 102063084A
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roller
roll
angularity
value
supplied materials
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CN102063084B (en
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谢霄鹏
吴毅平
龚少腾
朱涛
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Shanghai Baosight Software Co Ltd
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Abstract

The invention discloses a roll bending normalization setting method for a roll straightening machine. The method comprises the following steps that: limit width capable of straightening by a straightening roll, the maximum roll bending value of the straightening roll depending on the straightening capacity of the straightening machine, and the warping degree of supplied materials with the limit width are stored in a controller; the controller calculates a roll gap of the straightening machine according to roll gap set data to complete setting the roll gap, and the roll gap set value at a roll bending zero point is a roll gap set value of a wave-free plate in the same specification; according to the roll bending set data, the warping degree lambda of the supplied plate is transformed into the equivalent warping degree; N warping degree ranges can be divided in a range from 0 to the warping degree of supplied materials with the limit width according to amplitude levels, wherein the warping degree ranges correspond to N roll bending values from 0 to the maximum roll bending value of the straightening roll respectively; therefore, the roll bending value of each straightening roll can be set by judging the warping degree range of the equivalent warping degree of the supplied plate. The method can improve the roll bending set accuracy, so that the product yield is improved, and the operation is simple and practicable.

Description

Roll leveller roller normalization establishing method
Technical field
The invention belongs to automatic technology, relate to the board-shape control method of steel sheet product, particularly a kind of roll leveller roller normalization establishing method.
Background technology
For the flatness that guarantees steel plate meets the product standard regulation, usually need utilize roll leveller to align, roll leveller as shown in Figure 1, there are a plurality of smoothing rolls to arrange alternately up and down respectively, regulate the roll gap between smoothing roll up and down, steel plate is imported between the upper and lower roll system from an end, derive from the other end, thereby the steel plate limit is aligned by the limit.
At present, third generation roll leveller generally is provided with roll-bending device, is used to regulate the roll forming of smoothing roll, can realize the roller function, and the roller function of roll leveller is used at the bigger steel plate supplied materials of shape wave.But because roller Theoretical Calculation complexity is (according to the traditional mechanics theory, can't obtain analytic equation), steel plate comes flitch shape complexity, the bending roller force that causes calculates and can not carry out, so in actual production, only set less smoothing roll roller value usually, regulate the roll forming of smoothing roll by a small margin, the roller function only is used to compensate the smoothing roll amount of deflection that straightening force produces, but when coming the steel plate material shape wave big, this less roller setting value can't satisfy production requirement.After the bigger steel plate supplied materials of shape wave enters straightener,, may cause following consequence if there is the smoothing roll roller value at wave place less:
1) near the excess stock along its length at supplied materials wave place can be driven into next trough from a trough when aligning, before excess stock is moulded the smoothing roll of district's ratio through the generation maximum, plastic yield takes place, form the moderate seas of deep camber, the angularity of supplied materials shape wave is big more, and the moderate seas curvature of generation is big more.Because of the intermesh determination model of straightener is not considered the original curvature of supplied materials, so be only applicable to the supplied materials of the original curvature in the certain limit according to the roll gap of model specification.When the curvature of moderate seas during greater than the scope of application of model specification roll gap, the surface of steel plate behind the aligning can be seen the secondary moderate seas of longitudinally arranging, and has a strong impact on strip shape quality.
2) even the sheet material behind the aligning does not have tangible secondary moderate seas, its residual stress distribution also can be seriously uneven, even can surpass the residual stress level before the supplied materials aligning.As user during to the sheet material cutting, if the balance of unrelieved stress is broken, various wooden dipper songs will take place in sheet material.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of roll leveller roller normalization establishing method, can improve the roller setting accuracy, the rate thereby the raising product is become a useful person, and simple.
For solving the problems of the technologies described above, roll leveller roller normalization establishing method of the present invention, the roll-bending device of straightener is installed on top roll system or lower roll system, the limit width that can align that each smoothing roll in the roller system of roll-bending device is installed is identical, the maximum roller value of each smoothing roll is identical when the supplied materials width is limit width, it is characterized in that, may further comprise the steps:
The maximum roller value Y of the smoothing roll that store limit width B that smoothing roll can align in step 1, the controller, depends on the straightener straightening capacity BmaxAngularity λ with limit width supplied materials Max
Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, comprise the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials in the roller setting data;
Step 3, controller start the intermesh determination thread, according to intermesh determination data computation straightener roll gap, finish intermesh determination, and the fixed value of roller slit at roller place at zero point is the fixed value of roller slit that same size does not have unrestrained sheet material; Start roller simultaneously and set thread,, calculate the roller setting value of straightener roll of straightener, finish the roller of calculating straightener roll of straightener and set, specifically may further comprise the steps according to the roller setting data:
One. the angularity λ of sheet material supplied materials is converted to the equivalent angularity
Figure B200910201816XD0000021
Two. at 0 angularity λ to limit width supplied materials MaxBetween be divided into N angularity scope, N is a positive integer, each angularity scope is respectively with greater than the 0 maximum roller value Y smaller or equal to smoothing roll BmaxN roller value corresponding, according to the equivalent angularity of sheet material supplied materials
Figure B200910201816XD0000023
The pairing roller value of residing angularity scope is set the roller value of each smoothing roll.
Can shape wave be divided into 5 grades such as not having wave, smooth sea, moderate seas, middle wave and billow according to the roller ability and the plate shape wave amplitude of smoothing roll, at 0 angularity λ to limit width supplied materials MaxBetween be divided into 5 angularity scopes, the corresponding relation of shape wave grade, angularity scope, roller value is: the angularity scope of smooth sea is 0＜λ≤0.5 λ Max, the roller value is 0.25Y BmaxThe angularity scope of moderate seas is 0.5 λ Max＜λ≤0.7 λ Max, the roller value is 0.5Y BmaxThe angularity scope of middle wave is 0.7 λ Max＜λ≤0.85 λ Max, the roller value is 0.75Y BmaxThe angularity scope of billow is λ＞0.85 λ Max, the roller value is Y Bmax, when the equivalent angularity of sheet material supplied materials
Figure B200910201816XD0000031
When being in the angularity scope of smooth sea, the roller value of smoothing roll is set at 0.25Y BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set at 0.5Y Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set at 0.75Y Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set at Y Bmax
Can the angularity λ of sheet material supplied materials be provided or on man-machine interface, select shape wave and wave amplitude grade that the angularity λ of sheet material supplied materials is provided by plate profile instrument by artificial judgment.
Roll leveller roller normalization establishing method of the present invention, calculate the roller amount according to the angularity of supplied materials shape wave, simple in the actual production, the angularity of different in width supplied materials is changed into the equivalent angularity of limit width supplied materials, according to the equivalent angularity, obtain the equivalent wave amplitude grade and the roller setting value of supplied materials, realize roller setting normalization, the roller value that solves different in width is calculated, thereby be convenient to straightener is carried out roller control, avoided having simplified the roller establishing method, improved the product lumber recovery because of coming the complicated roller that causes of flitch shape to calculate failure.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the roll leveller synoptic diagram;
The roller synoptic diagram at zero point of smoothing roll when Fig. 2 is the monolateral unrestrained plate shape of aligning;
Fig. 3 is the roller synoptic diagram at zero point of smoothing roll during unrestrained plate shape in the aligning;
The roller synoptic diagram at zero point of smoothing roll when Fig. 4 is the bilateral unrestrained plate shape of aligning;
Fig. 5 is the angularity synoptic diagram that the angularity of the sheet material supplied materials of different in width all converts limit width supplied materials to;
Fig. 6 is roll leveller roller normalization establishing method one an embodiment synoptic diagram of the present invention.
Embodiment
The roll-bending device of roll leveller is used to regulate the roll forming of smoothing roll, mainly is applicable to the sheet material supplied materials of aligning monolateral wave, middle wave and bilateral unrestrained plate shape.If will realize aligning the roller roll forming of high order wave, derivation method and top three class shape waves are similar.
Because of causing the smoothing roll spatiality, roll-bending device effect meeting changes, be convenient research roller, for different shape waves, axially select different roller zero points along smoothing roll, put aside the amount of deflection that produces because of straightening force, mainly contain following several situation: align monolateral when unrestrained as shown in Figure 2, smoothing roll need not produce deflection, tilt get final product, roller zero point is monolateral nothing wave place, and monolateral have wave to locate the roll gap maximum; Roller is located at the sheet material both sides along the sheet material Width zero point as shown in Figure 3 when wave in the aligning, and maximum roller value is located at along the centerline of sheet material Width; Align bilateral when wave as shown in Figure 4, roller is located at along the centerline of sheet material Width zero point, and maximum roller value is located at the sheet material both sides along the sheet material Width; Actual roller value along the axial different parts of smoothing roll is with respect to the roller roll gap changing value at zero point.The roll gap changing value of selecting smoothing roll as the advantage of roller value be can the intuitive judgment roller to the influence of plate shape.The fixed value of roller slit at roller place at zero point is the fixed value of roller slit that same size does not have unrestrained sheet material.
Roller is set the maximum roller value that is meant at specific sheet material supplied materials plate shape and is set.As shown in Figure 1, roll leveller comprises top roll system, lower roll system, sheet material is from passing between top roll system, lower roll system to carry out plate shape aligning, the roll-bending device of straightener is installed on top roll system or lower roll system (roll-bending device of straightener generally is installed on top roll system), the sequence number of each smoothing roll is respectively i (the sequence number i=2k of each smoothing roll in the top roll system among Fig. 1 in the upper and lower roll system, the sequence number i=2k-1 of each smoothing roll in the lower roll system, k is a positive integer)
According to plate shape theory, establishing sheet material supplied materials shape wave is Sine distribution, and then when the supplied materials width is limit width B, the maximum roller value that i roller in the roller system of roll-bending device is installed is:
Y Bi = K 1 * π 2 8 ( R L ) 2 * P + K 2 F i = K 1 * π 2 8 λ max 2 * P + K 2 F i - - - ( 1 )
In the formula, R is the shape wave wave amplitude, and L is the shape wave wavelength, and P is a pitch between smoothing roll, and K1 is shape corrections coefficient (getting 0.5 temporarily), F iBe the straightening force of i roller, K2 is the flexibility factor relevant with straightening force, the angularity of limit width supplied materials
Figure B200910201816XD0000052
Formula 1 also is applicable to the straightener of tension force, and as the straightening machine, but R and L are necessary for the value under the tension force effect.
Supposing to establish the limit width that can align of each smoothing roll in the roller system that straightener is equipped with roll-bending device identical all is B, and the straightening force of each smoothing roll is identical, and then the maximum roller value of each smoothing roll is Y when the supplied materials width is limit width B Bmax, if put aside straightening force F iAmount of deflection that causes and tension force, according to formula (1), the angularity of limit width supplied materials is:
λ max = ( 8 Y B max π 2 K 1 P ) 1 2 - - - ( 2 )
Roll leveller roller normalization establishing method one embodiment of the present invention as shown in Figure 6, the roll-bending device of straightener is installed on top roll system or lower roll system, the limit width that can align that each smoothing roll in the roller system of roll-bending device is installed is identical, the maximum roller value of each smoothing roll is identical when the supplied materials width is limit width, may further comprise the steps:
The maximum roller value Y of the smoothing roll that store limit width B that smoothing roll can align in step 1, the controller, depends on the straightener straightening capacity BmaxAngularity λ with limit width supplied materials Max
Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, comprise the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials in the roller setting data; The angularity λ of sheet material supplied materials can be provided by plate profile instrument, perhaps on man-machine interface, select shape wave and wave amplitude grade that the angularity λ of sheet material supplied materials is provided by artificial judgment;
Step 3, controller start the intermesh determination thread, according to intermesh determination data computation straightener roll gap, finish intermesh determination, and the fixed value of roller slit at roller place at zero point is the fixed value of roller slit that same size does not have unrestrained sheet material; Start roller simultaneously and set thread,, calculate the roller setting value of straightener roll of straightener, finish the roller of calculating straightener roll of straightener and set, specifically may further comprise the steps according to the roller setting data: one, the angularity λ of sheet material supplied materials is converted to the equivalent angularity
Figure B200910201816XD0000061
Figure B200910201816XD0000062
For the supplied materials of different in width, even shape wave is identical with angularity, the roller of straightener is set also may be different.For making things convenient for set-up and calculated, all convert the angularity of the sheet material supplied materials of different in width to the angularity (see figure 5) of limit width supplied materials, i.e. equivalent angularity;
Two. at 0 angularity λ to limit width supplied materials MaxBetween be divided into N angularity scope, each angularity scope is respectively with greater than the 0 maximum roller value Y smaller or equal to smoothing roll BmaxN roller value corresponding, according to the equivalent angularity of sheet material supplied materials
Figure B200910201816XD0000063
The pairing roller value of residing angularity scope is set the roller value of each smoothing roll.
One embodiment is divided into 5 grades such as not having wave, smooth sea, moderate seas, middle wave and billow according to the roller ability of smoothing roll and plate shape wave amplitude with shape wave, at the 0 angularity λ that arrives limit width supplied materials MaxBetween be divided into 5 angularity scopes, the corresponding relation of shape wave grade, angularity scope, roller value is: the angularity scope of smooth sea is 0＜λ≤0.5 λ Max, the roller value is 0.25Y BmaxThe angularity scope of moderate seas is 0.5 λ Max＜λ≤0.7 λ Max, the roller value is 0.5Y BmaxThe angularity scope of middle wave is 0.7 λ Max＜λ≤0.85 λ Max, the roller value is 0.75Y BmaxThe angularity scope of billow is λ＞0.85 λ Max, the roller value is Y BmaxEquivalent angularity when the sheet material supplied materials
Figure B200910201816XD0000064
When being in the angularity scope of smooth sea, the roller value of smoothing roll is set at 0.25Y BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set at 0.5Y Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set at 0.75Y Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set at Y Bmax
Roll leveller roller normalization establishing method of the present invention, calculate the roller amount according to the angularity of supplied materials shape wave, simple in the actual production, the angularity of different in width supplied materials is changed into the equivalent angularity of limit width supplied materials, according to the equivalent angularity, obtain the equivalent wave amplitude grade and the roller setting value of supplied materials, realize roller setting normalization, the roller value that solves different in width is calculated, thereby be convenient to straightener is carried out roller control, avoided having simplified the roller establishing method, improved the product lumber recovery because of coming the complicated roller that causes of flitch shape to calculate failure.

Claims (4)

1. roll leveller roller normalization establishing method, the roll-bending device of straightener is installed on top roll system or lower roll system, the limit width that can align that each smoothing roll in the roller system of roll-bending device is installed is identical, the maximum roller value of each smoothing roll is identical when the supplied materials width is limit width, it is characterized in that, may further comprise the steps:
The maximum roller value Y of the smoothing roll that store limit width B that smoothing roll can align in step 1, the controller, depends on the straightener straightening capacity BmaxAngularity λ with limit width supplied materials Max
Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, comprise the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials in the roller setting data;
Step 3, controller start the intermesh determination thread, according to intermesh determination data computation straightener roll gap, finish intermesh determination, and the fixed value of roller slit at roller place at zero point is the fixed value of roller slit that same size does not have unrestrained sheet material; Start roller simultaneously and set thread,, calculate the roller setting value of straightener roll of straightener, finish the roller of calculating straightener roll of straightener and set, specifically may further comprise the steps according to the roller setting data:
One. the angularity λ of sheet material supplied materials is converted to the equivalent angularity
Two. at 0 angularity λ to limit width supplied materials MaxBetween be divided into N angularity scope, N is a positive integer, each angularity scope is respectively with greater than the 0 maximum roller value Y smaller or equal to smoothing roll BmaxN roller value corresponding, according to the equivalent angularity of sheet material supplied materials
Figure F200910201816XC0000013
The pairing roller value of residing angularity scope is set the roller value of each smoothing roll.
2. roll leveller roller normalization establishing method according to claim 1, it is characterized in that, roller ability and plate shape wave amplitude according to smoothing roll are divided into 5 grades such as not having wave, smooth sea, moderate seas, middle wave and billow with shape wave, at the 0 angularity λ to limit width supplied materials MaxBetween be divided into 5 angularity scopes, the corresponding relation of shape wave grade, angularity scope, roller value is: the angularity scope of smooth sea is 0＜λ≤0.5 λ Max, the roller value is 0.25Y BmaxThe angularity scope of moderate seas is 0.5 λ Max＜λ≤0.7 λ Max, the roller value is 0.5Y BmaxThe angularity scope of middle wave is 0.7 λ Max＜λ≤0.85 λ Max, the roller value is 0.75Y BmaxThe angularity scope of billow is λ＞0.85 λ Max, the roller value is Y Bmax, when the equivalent angularity of sheet material supplied materials When being in the angularity scope of smooth sea, the roller value of smoothing roll is set at 0.25Y BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set at 0.5Y Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set at 0.75Y Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set at Y Bmax
3. roll leveller roller normalization establishing method according to claim 1 is characterized in that, the angularity λ of sheet material supplied materials is provided by plate profile instrument.
4. roll leveller roller normalization establishing method according to claim 1 is characterized in that, selects shape wave and wave amplitude grade that the angularity λ of sheet material supplied materials is provided on man-machine interface by artificial judgment.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104511483A (en) * 2013-09-26 2015-04-15 宝山钢铁股份有限公司 Hot-rolled strip shape compensation rolling method
CN104511483B (en) * 2013-09-26 2016-11-30 宝山钢铁股份有限公司 A kind of Flatness of Hot Rolled Strip compensates milling method
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

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Publication number Priority date Publication date Assignee Title
US4648256A (en) * 1984-05-09 1987-03-10 Mitsubishi Denki Kabushiki Kaisha Shape control apparatus for flat material
JPH05111712A (en) * 1991-10-22 1993-05-07 Sumitomo Metal Ind Ltd Method for controlling sheet thickness/crown in continuous mill
CN1422708A (en) * 2001-12-07 2003-06-11 株式会社日立制作所 Shape-controlling method and device for continuous-rolling mill
CN1485156A (en) * 2002-09-28 2004-03-31 鞍钢集团新钢铁有限责任公司 Hot-rolled strip steel moderate sea profile shape controlling method
CN101491814A (en) * 2009-01-14 2009-07-29 太原科技大学 Synthetic setting technology of roll-bending force of five-frame four-roll cold continuous rolling device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648256A (en) * 1984-05-09 1987-03-10 Mitsubishi Denki Kabushiki Kaisha Shape control apparatus for flat material
JPH05111712A (en) * 1991-10-22 1993-05-07 Sumitomo Metal Ind Ltd Method for controlling sheet thickness/crown in continuous mill
CN1422708A (en) * 2001-12-07 2003-06-11 株式会社日立制作所 Shape-controlling method and device for continuous-rolling mill
CN1485156A (en) * 2002-09-28 2004-03-31 鞍钢集团新钢铁有限责任公司 Hot-rolled strip steel moderate sea profile shape controlling method
CN101491814A (en) * 2009-01-14 2009-07-29 太原科技大学 Synthetic setting technology of roll-bending force of five-frame four-roll cold continuous rolling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104511483A (en) * 2013-09-26 2015-04-15 宝山钢铁股份有限公司 Hot-rolled strip shape compensation rolling method
CN104511483B (en) * 2013-09-26 2016-11-30 宝山钢铁股份有限公司 A kind of Flatness of Hot Rolled Strip compensates milling method
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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