CN102063084B - Roll bending normalization setting method for roll straightening machine - Google Patents

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 bending normalization setting method for roll straightening machine

Technical field

The invention belongs to automatic technology, relate to the board-shape control method of steel sheet product, particularly a kind of roll bending normalization setting method for roll straightening machine.

Background technology

For the flatness that guarantees steel plate meets the product standard regulation, usually need to utilize roll leveller to align, roll leveller as shown in Figure 1, there are respectively up and down a plurality of smoothing rolls to arrange alternately, regulate the roll gap between the smoothing roll of up and down, between steel plate is imported 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 for regulating the roll forming of smoothing roll, can realize the roller function, and the roller function of roll leveller is used for for the larger steel plate supplied materials of shape wave.But because the theoretical calculation of complex of roller is (theoretical according to traditional mechanics, can't obtain analytic equation), the steel plate incoming profile is complicated, the bending roller force that causes calculates and can not carry out, therefore in actual production, usually only set less smoothing roll roller value, regulate by a small margin the roll forming of smoothing roll, the roller function only is used for the smoothing roll amount of deflection that the compensation straightening force produces, but when coming the steel plate material shape wave larger, this less roller setting value can't satisfy production requirement.After the larger steel plate supplied materials of shape wave enters straightener, if the smoothing roll roller value that has wave to locate is less, may cause following consequence:

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 producing maximum, plastic yield occurs, form the moderate seas of deep camber, the angularity of supplied materials shape wave is larger, and the moderate seas curvature of generation is larger.Do not consider the original curvature of supplied materials because of the gap Set Model of straightener, therefore be only applicable to the supplied materials of the original curvature in certain limit according to the roll gap of model specification.During greater than the scope of application of model specification roll gap, the surface of steel plate after aligning can be seen the secondary moderate seas of longitudinally arranging, and has a strong impact on strip shape quality when the curvature of moderate seas.

2) even the sheet material after aligning does not have obvious secondary moderate seas, its residual stress distribution also can be seriously uneven, even can surpass the front residual stress level of supplied materials aligning.During to the sheet material cutting, if the balance of unrelieved stress is broken, it is bent that various wooden dippers will occur in sheet material as the user.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of roll bending normalization setting method for roll straightening machine, 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 bending normalization setting method for roll straightening machine of the present invention, the roll-bending device of straightener is installed on upper roller system or lower roll is, 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, comprise the following steps:

The maximum roller value Y of the smoothing roll that store Limit Width B that smoothing roll can align in step 1, controller, depends on the straightener straightening capacity _BmaxAngularity λ with the Limit Width supplied materials _max

Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, and the roller setting data comprises the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials;

Step 3, controller start the intermesh determination thread, calculate the straightener roll gap according to the intermesh determination data, complete intermesh determination, and the fixed value of roller slit at roller place at zero point is that same size is without the fixed value of roller slit of unrestrained sheet material; Start simultaneously roller and set thread, according to the roller setting data, calculate the roller setting value of straightener roll of straightener, complete the roller of calculating straightener roll of straightener and set, specifically comprise the following steps:

One. the angularity λ of sheet material supplied materials is converted to equivalent angularity λ, $\stackrel{\‾}{\mathrm{\λ}}=\mathrm{\λ}{\left(\frac{B}{b}\right)}^2;$

Two. at the 0 angularity λ to the Limit Width supplied materials _maxBetween be divided into N angularity scope, N is positive integer, each angularity scope is respectively with greater than the 0 maximum roller value Y less than or equal to smoothing roll _BmaxN roller value corresponding, set the roller value of each smoothing roll according to the corresponding roller value of the residing angularity scope of equivalent angularity λ of sheet material supplied materials.

Can shape wave be divided into without 5 grades such as wave, smooth sea, moderate seas, middle wave and billows according to roller ability and the plate shape wave amplitude of smoothing roll, at the 0 angularity λ to the 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 λ of sheet material supplied materials was in the angularity scope of smooth sea, the roller value of smoothing roll was set as 0.25Y _BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set as 0.5Y _Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set as 0.75Y _Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set as Y _Bmax

Can the angularity λ of sheet material supplied materials be provided or select shape wave and wave amplitude grade that the angularity λ of sheet material supplied materials is provided by artificial judgment on man-machine interface by plate profile instrument.

roll bending normalization setting method for roll straightening machine of the present invention, calculate the roller amount according to the angularity of supplied materials shape wave, simple in 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 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 being convenient to that straightener is carried out roller controls, avoided calculating unsuccessfully because of the complicated roller that causes of incoming profile, simplified the roller establishing method, improved the product lumber recovery.

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 schematic diagram;

The roller schematic diagram at zero point of smoothing roll when Fig. 2 is the monolateral unrestrained plate shape of aligning;

Fig. 3 is the roller schematic diagram at zero point of smoothing roll during unrestrained plate shape in aligning;

The roller schematic diagram at zero point of smoothing roll when Fig. 4 is the bilateral unrestrained plate shape of aligning;

Fig. 5 is the angularity schematic diagram that the angularity of the sheet material supplied materials of different in width all converts the Limit Width supplied materials to;

Fig. 6 is roll bending normalization setting method for roll straightening machine one embodiment schematic diagram of the present invention.

Embodiment

The roll-bending device of roll leveller is used for regulating the roll forming of smoothing roll, mainly is applicable to align the sheet material supplied materials of monolateral wave, middle wave and bilateral unrestrained plate shape.If realize aligning the roller roll forming of high order wave, derivation method and top three class shape waves are similar.

Because causing the smoothing roll spatiality, roll-bending device effect meeting changes, study for convenience 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 without the wave place, and monolateral have a wave place roll gap maximum; In aligning roller is located at the sheet material both sides along the sheet material Width zero point as shown in Figure 3 when wave, and maximum roller value is located at along the centerline of sheet material Width; When aligning bilateral 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 on the impact of plate shape.The fixed value of roller slit at roller place at zero point is that same size is without the fixed value of roller slit of unrestrained sheet material.

Roller is set the maximum roller value that refers to for specific sheet material incoming profile and is set.As shown in Figure 1, roll leveller comprises that upper roller system, lower roll are, sheet material passes to carry out plate shape aligning between upper roller system, lower roll are, the roll-bending device of straightener is installed on upper roller system or lower roll system (roll-bending device of straightener generally is installed on upper roller system), in upper and lower roll system, the sequence number of each smoothing roll is respectively i (the sequence number i=2k of each smoothing roll in upper roller system in Fig. 1, the sequence number i=2k-1 of each smoothing roll in lower roll system, k is positive integer)

Theoretical according to plate shape, establishing sheet material supplied materials shape wave is Sine distribution, when the supplied materials width is Limit Width B, the roller that roll-bending device is installed be in the maximum roller value of i roller be:

$Y_{\mathrm{Bi}}=K_1*\frac{{\mathrm{\π}}^2}{8}{\left(\frac{R}{L}\right)}^2*P+K_2{F}_i=K_1*\frac{{\mathrm{\π}}^2}{8}{{\mathrm{\λ}}_{\max }}^2*P+K_2{F}_i---\left(1\right)$

In formula, R is the shape wave wave amplitude, and L is the shape wave wavelength, and P is pitch between smoothing roll, and K1 is shape correction factor (getting temporarily 0.5), F _iBe the straightening force of i roller, K2 is the flexibility factor relevant to straightening force, the angularity of Limit Width supplied materials ${\mathrm{\λ}}_{\max }=\frac{R}{L}*100\%.$ Formula 1 also is applicable to the straightener of tension force, and as withdrawal 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 is all B, and the straightening force of each smoothing roll is identical, and the maximum roller value of each smoothing roll is Y when the supplied materials width is Limit Width B _BmaxIf put aside straightening force F _iThe amount of deflection that causes and tension force, according to formula (1), the angularity of Limit Width supplied materials is:

${\mathrm{\λ}}_{\max }={\left(\frac{{8Y}_{B\max }}{{\mathrm{\π}}^2{K}_{1}P}\right)}^{\frac{1}{2}}---\left(2\right)$

Roll bending normalization setting method for roll straightening machine one embodiment of the present invention as shown in Figure 6, the roll-bending device of straightener is installed on upper roller system or lower roll is, 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, comprises the following steps:

The maximum roller value Y of the smoothing roll that store Limit Width B that smoothing roll can align in step 1, controller, depends on the straightener straightening capacity _BmaxAngularity λ with the Limit Width supplied materials _max

Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, and the roller setting data comprises the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials; The angularity λ of sheet material supplied materials can be provided by plate profile instrument, perhaps select shape wave and wave amplitude grade that the angularity λ of sheet material supplied materials is provided by artificial judgment on man-machine interface;

Step 3, controller start the intermesh determination thread, calculate the straightener roll gap according to the intermesh determination data, complete intermesh determination, and the fixed value of roller slit at roller place at zero point is that same size is without the fixed value of roller slit of unrestrained sheet material; Start simultaneously roller and set thread, according to the roller setting data, calculate the roller setting value of straightener roll of straightener, complete the roller of calculating straightener roll of straightener and set, specifically comprise the following steps:

One, the angularity λ of sheet material supplied materials is converted to equivalent angularity λ, $\stackrel{\‾}{\mathrm{\λ}}=\mathrm{\λ}{\left(\frac{B}{b}\right)}^2;$

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 convenience of set calculating, the angularity of the sheet material supplied materials of different in width is all converted to the angularity (seeing Fig. 5) of Limit Width supplied materials, i.e. the equivalent angularity;

Two. at the 0 angularity λ to the 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 less than or equal to smoothing roll _BmaxN roller value corresponding, set the roller value of each smoothing roll according to the corresponding roller value of the residing angularity scope of equivalent angularity λ of sheet material supplied materials.

One embodiment is divided into shape wave without 5 grades such as wave, smooth sea, moderate seas, middle wave and billows according to the roller ability of smoothing roll and plate shape wave amplitude, at the 0 angularity λ that arrives the 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 _BmaxWhen the equivalent angularity λ of sheet material supplied materials was in the angularity scope of smooth sea, the roller value of smoothing roll was set as 0.25Y _BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set as 0.5Y _Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set as 0.75Y _Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set as Y _Bmax

roll bending normalization setting method for roll straightening machine of the present invention, calculate the roller amount according to the angularity of supplied materials shape wave, simple in 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 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 being convenient to that straightener is carried out roller controls, avoided calculating unsuccessfully because of the complicated roller that causes of incoming profile, simplified the roller establishing method, improved the product lumber recovery.

Claims (4)

1. roll bending normalization setting method for roll straightening machine, the roll-bending device of straightener is installed on upper roller system or lower roll is, 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, comprise the following steps:

The maximum roller value Y of the smoothing roll that store Limit Width B that smoothing roll can align in step 1, controller, depends on the straightener straightening capacity _BmaxAngularity λ with the Limit Width supplied materials _max

Step 2, controller receive process data, and process data comprises intermesh determination data and roller setting data, and the roller setting data comprises the developed width b of sheet material supplied materials, the angularity λ of sheet material supplied materials;

Step 3, controller start the intermesh determination thread, calculate the straightener roll gap according to the intermesh determination data, complete intermesh determination, and the fixed value of roller slit at roller place at zero point is that same size is without the fixed value of roller slit of unrestrained sheet material; Start simultaneously roller and set thread, according to the roller setting data, calculate the roller setting value of straightener roll of straightener, complete the roller of calculating straightener roll of straightener and set, specifically comprise the following steps:

One. the angularity λ of sheet material supplied materials is converted to the equivalent angularity

Two. at the 0 angularity λ to the Limit Width supplied materials _maxBetween be divided into N angularity scope, N is positive integer, each angularity scope is respectively with greater than the 0 maximum roller value Y less than or equal to smoothing roll _BmaxN roller value corresponding, according to the equivalent angularity of sheet material supplied materials

The corresponding roller value of residing angularity scope is set the roller value of each smoothing roll.

2. roll bending normalization setting method for roll straightening machine according to claim 1, it is characterized in that, according to roller ability and the plate shape wave amplitude of smoothing roll, shape wave is divided into without wave, smooth sea, moderate seas, middle wave and 5 grades of billow, at the 0 angularity λ to the Limit Width supplied materials _maxBetween be divided into 5 angularity scopes, the corresponding relation of shape wave grade, angularity scope, roller value is: without the wave angularity be 0, the roller value is 0; 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 nothing wave, the roller value of smoothing roll is set as 0; When being in the angularity scope of smooth sea, the roller value of smoothing roll is set as 0.25Y _BmaxWhen being in the angularity scope of moderate seas, the roller value of smoothing roll is set as 0.5Y _Bmax, when being in the angularity scope of middle wave, the roller value of smoothing roll is set as 0.75Y _Bmax, when being in the angularity scope of billow, the roller value of smoothing roll is set as Y _Bmax

3. roll bending normalization setting method for roll straightening machine according to claim 1, is characterized in that, the angularity λ of sheet material supplied materials is provided by plate profile instrument.

4. roll bending normalization setting method for roll straightening machine 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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