CN101890435B - Method for automatically controlling convexity and/or wedge of hot rolled in series type rolling machine and system thereof - Google Patents

Abstract

The invention relates to a method for automatically controlling the convexity and/or wedge of a hot rolled in series type rolling machine and a system (ASCC) thereof. The method comprises the following steps of: building feedback control for the bending of a working roll and the flattening of a roll gap from a first finishing mill stander to a final finishing mill stander in the hot rolled in series type rolling machine to automatically control the convexity (wedge) of strip steel, i.e. comparing the strip steel wedge which is detected by an ASCC model with the object wedge during rolling to obtain the difference; and correcting the difference through the comprehensive computation and the control method of the system to build a step type adjusting method. Therefore, the invention maximizes the response of the feedback control to correct the wedge and the convexity of the strip steel, guarantees the good flatness of products, prevents the strip steel to have snake-like motion in each stander, overcomes the defect that the existing convexity controlling method is single, and comprehensively balances the relationship between the convexity and the wedge. The invention can guarantee the convexity precision of the wedge along the long axis direction of the strip steel, improves the flatness, guarantees the product quality and the production safety, and can effectively improve the economic benefit of steel rolling factories.

Description

The convexity of hot rolled in series type rolling machine and/or wedge shape autocontrol method and system

Technical field

The invention belongs to automation control area; Strip crown (wedge shape) autocontrol method and device that it relates to output strip line, relate in particular to a kind of can be in band steel production process dynamically convexity and/or the wedge shape autocontrol method and the system of the hot rolled in series type rolling machine of the glacing flatness of control band steel total length direction and convexity (wedge shape).

Background technology

At present, on output strip line, adopt the tandem mm finishing mill unit to be rolled usually, but the convexity of common seven frame tandem mm finishing mill unit control model function singleness does not have automatic wedge shape control technology, there are many defectives in it, as:

(1) convexity adjustment means: the convexity control in convexity and the plate shape control model mainly acts on a certain finishing mill, and promptly convexity in the second computer and plat control system calculate the roll gap convexity of this frame according to wearing and tearing, thermal expansion and the actual roll-force of roll, after comparing with setting value; Carry out corresponding adjusting through bending roller force; Guarantee the convexity of rolled piece, and then the control glacing flatness, owing to only act on a finishing mill; Make that the convexity control device is single; Can't effectively adjust the convexity of other frames, need the operative employee to carry out manual roller adjustment and perhaps finely tune the roll-force distribution, cause the control device of convexity and glacing flatness backward relatively.

(2) flatness control: the final purpose of convexity control is in order to obtain good glacing flatness, and the control of output strip line glacing flatness at present only acts on last frame (F ₇), when receiving the glacing flatness instrument when passing the board form data come, control glacing flatness through the bending roller force of adjusting last frame, still, after coiling machine is built,, cause adjusting poor effect because glacing flatness instrument output valve is unreal, plate shape is undesirable.

(3) wedge shape control technology: owing to there is not automatic wedge shape control technology, cause being with steel to produce monolateral wave and production safety problem easily, these problems can't improve in existing control model.

Therefore, summarize it, convexity of the prior art and plate shape control technology and equipment can't satisfy the belt plate shape quality requirement of strictness, demand urgently transforming and perfect, so that satisfy the product quality demand in market.

Summary of the invention

The objective of the invention is to propose a kind of convexity and/or wedge shape autocontrol method and system of hot rolled in series type rolling machine, it can effectively guarantee convexity precision and the wedge shape of band at long axis direction, improves glacing flatness.Guarantee product quality and production safety, thereby overcome deficiency of the prior art.

For realizing the foregoing invention purpose, the present invention has adopted following technical scheme:

A kind of convexity of hot rolled in series type rolling machine and/or wedge shape automatic control system; In the hot rolled in series type rolling machine that its several finishing stands that are applied to mainly to be provided with by series connection are formed; All be equipped with work roll bending Adjustment System and roller gap Adjustment System on each finishing stand, it is characterized in that:

Said convexity and/or wedge shape automatic control system comprise convexity and/or wedge shape control device, and work roll bending Adjustment System on said convexity and/or wedge shape control device and each finishing stand and roller gap Adjustment System and the band plate shape that is arranged on the finish rolling outlet and wedge shape and/or convex measuring device are connected respectively;

And; Band plate shape that said convexity and/or wedge shape control device can regularly record according to band plate shape and wedge shape and/or convex measuring device and wedge shape and/or convexity data and target wedge shape and/or convexity data are the gained difference relatively; Through the roll gap and the work roll bending power of the work roll bending Adjustment System on each finishing stand and each finishing stand of roller gap Adjustment System adjustment, be implemented in the automatic convexity and/or the wedge shape control of the long axis direction of band.

Say further: said convexity and/or wedge shape control device are connected with the work roll bending Adjustment System with the roller gap Adjustment System with work roll bending power gauge tap through roll gap leveling gauge tap respectively;

When the band head arrived the plate profile instrument measurement mechanism, work roll bending power gauge tap was closed, and the work roll bending Adjustment System is started working, and when the band afterbody was cut by flying shear, work roll bending power gauge tap broke off, and the work roll bending Adjustment System quits work;

When the band head gets into underground curling, and when building, roll gap leveling gauge tap is closed, and the roller gap Adjustment System is started working, and when the band afterbody was cut by flying shear, roll gap leveling gauge tap broke off, and the roller gap Adjustment System quits work.

Said roll gap leveling gauge tap is connected with said convexity and/or wedge shape control device through a control master switch respectively with work roll bending power gauge tap.

All adopt interlock to connect between said convexity and/or wedge shape control device, band plate shape and wedge shape and/or convex measuring device, work roll bending Adjustment System and the roller gap Adjustment System.

The process that the said automatic wedge shape that is implemented in the long axis direction of band is controlled is:

(1) influence coefficient and succession coefficient are imported in advance: be out of shape the calculated off line influence coefficient and inherit coefficient according to milling train, roll and band, and these influence coefficients and succession coefficient are imported convexity and/or wedge shape control device;

(2) convexity and/or wedge shape control device input data: accomplish milling train set-up and calculated and plate shape set-up and calculated, afterwards with gained result of calculation and band characteristic information input convexity and/or wedge shape control device;

(3) convexity and/or wedge shape control device plate shape; Wedge shape; Convex measuring: when the band head arrives the finishing mill outlet, regularly measure band plate shape, wedge shape and convexity, convexity and/or wedge shape control device calculate the data mean value of band plate shape, wedge shape and convexity immediately; Wherein, Finishing mill outlet band wedge shape

is drawn by following formula, promptly

$\mathrm{\Δ}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)$

Wherein, is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(4) the wedge shape deviation is distributed: through horizontal adjustment finishing mill F ₁-F _MThe finishing mill of eliminating of frame exports the wedge shape deviation

And $\mathrm{\Δ}{C}_M^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\·\mathrm{\Δ}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)$

This step is specially:

At first, plate shape set-up and calculated is calculated each frame export goal band convexity and is obtained finish rolling export goal band convexity

With target frame outlet band convexity

And go out unit band convexity COEFFICIENT K by computes _i,

$\frac{C_i^{\mathrm{REF}}}{h_i}=K_i\·\frac{C_M^{\mathrm{REF}}}{h_M}$

Wherein, h _MBe the finish rolling exit thickness, it is a milling train set-up and calculated value, and i is a shelf number, and i=1,2 ... M, M are natural numbers;

Secondly; Pass through following formula; Be distributed to each finishing stand through finishing mill outlet band wedge shape deviation

; Promptly

$\frac{\mathrm{\Δ}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\·\frac{\mathrm{\Δ}{C}_M^{\mathrm{Wedge}}\left(T\right)}{h_M}$

Wherein,

is i frame outlet band wedge shape correction value;

(5) each frame roll gap of leveling control: roll gap leveling value Δ L can be drawn by following formula, that is,

$\mathrm{\Δ}{C}_i^{\mathrm{Wedge}}\left(T\right)={\mathrm{\α}}_i^L\left(T\right)\·\mathrm{\ΔL}+{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^{\mathrm{Wedge}}\left(T\right)$

Wherein,

Be the influence coefficient of strip edge place roll gap leveling to the band wedge shape, η _i(T) be that the band wedge shape is inherited coefficient, each finishing stand is according to gained roll gap leveling value Δ L adjustment roller gap;

Via above-mentioned steps, accomplish wedge shape adjustment work.

The process that the said automatic convexity that is implemented in the long axis direction of band is controlled is:

(1) band convex measuring and control: when the band head arrives the finishing mill outlet; Band plate shape, wedge shape and convexity are carried out timing and are measured; And calculate the data mean value of band plate shape, wedge shape and convexity immediately by convexity and/or wedge shape control device; Wherein, the measured value mean value

of finish rolling outlet band convexity is drawn by following formula:

$C_M^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}$

In the following formula; is the strip width center thickness value of measuring;

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and

is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(2) last frame band convexity deviation calculation: go out finish rolling outlet band convexity deviation

promptly according to computes

$\mathrm{\Δ}{C}_{\left(M\right)}^R\left(T\right)=C_M^{R,\mathrm{MEAS}}\left(T\right)-C_M^{R,\mathrm{REF}}\left(T\right)$

Wherein, is target finish rolling outlet band convexity;

(3) the convexity deviation is distributed: finish rolling is exported band convexity deviation be assigned to each frame through following formula; Promptly

$\frac{\mathrm{\Δ}{C}_i^R\left(T\right)}{h_i}=K_i\·\frac{\mathrm{\Δ}{C}_M^R\left(T\right)}{h_M}$

Wherein, i is a shelf number, and i=1,2 ... M, M are natural numbers, h _iBe i frame outlet thickness of strip, K _iBe ratio convexity coefficient,

Be each frame outlet band convexity correction value, It also is finish rolling outlet band convexity correction value;

(4) each frame working roller bending power adjustment:

By each frame working roller bending power controlling value Δ F of computes _i(ton/side):

${\mathrm{\ΔF}}_i=\frac{1}{{\mathrm{\α}}_i^B\left(T\right)}\·(\mathrm{\Δ}{C}_i^R\left(T\right)-{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^R\left(T\right))$

And $\mathrm{\Δ}{C}_i^R\left(T\right)={\mathrm{\α}}_i^B\left(T\right)\·{\mathrm{\Δ\; F}}_i+{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^R\left(T\right)$

Wherein, is the influence coefficient of band convexity to working roller bending power; η (T) is that the band convexity is inherited coefficient, substitution

$\mathrm{\Δ}{F}_i^{\mathrm{CTL}}=\mathrm{\Δ}{F}_i$

The work roll bending system that promptly draws each each frame of frame working roller bending power controlling value

is working roller bending power controlling value adjustment work roll bending power by this;

Via above-mentioned steps, accomplish convexity adjustment work.

Said band plate shape and wedge shape and/or convex measuring device comprise plate profile instrument, wedge shape and/or convex measuring instrument.

Said convexity and/or wedge shape control device adopt programmable logic controller (PLC).

A kind of convexity of hot rolled in series type rolling machine and/or wedge shape autocontrol method is characterized in that, this method is:

In the belt steel rolling process; Strip crown and/or wedge shape are carried out detection of dynamic; And detected strip crown and/or wedge shape and target convexity and/or target wedge shape compared; According to the deviate of actual strip profile and/or wedge shape and target convexity and/or target wedge shape, adjust roller gap and work roll bending power in each finishing mill respectively again, realize automatic glacing flatness and the convexity and/or the wedge shape control of rolled piece on long axis direction.

Particularly: when the band head arrives the plate profile instrument measurement mechanism, begin to carry out the adjustment of work roll bending power, when the band afterbody is cut by flying shear, the roller bending roller force that quits work adjustment, thus realize automatic convexity control.

When the band head gets into underground curling, and when building, begin to carry out the roller gap adjustment, when the band afterbody is cut by flying shear, stop the roller gap adjustment, thereby realize automatic wedge shape control.

The process of the automatic wedge shape control of said realization is:

(1) influence coefficient and succession coefficient are imported in advance: be out of shape the calculated off line influence coefficient and inherit coefficient according to milling train, roll and band, and these influence coefficients and succession coefficient are imported a convexity and/or wedge shape control device;

(2) convexity and/or wedge shape control device input data: accomplish milling train set-up and calculated and plate shape set-up and calculated, afterwards with gained result of calculation and band characteristic information input convexity and/or wedge shape control device;

(3) convexity and/or wedge shape control device plate shape; Wedge shape; Convex measuring: when the band head arrives the finishing mill outlet, regularly measure band plate shape, wedge shape and convexity, convexity and/or wedge shape control device calculate the data mean value of band plate shape, wedge shape and convexity immediately; Wherein, Finishing mill outlet band wedge shape

is drawn by following formula, promptly

${\mathrm{\ΔWedge}}_M^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)$

Wherein,

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(4) the wedge shape deviation is distributed: through horizontal adjustment finishing mill F ₁-F _MThe finishing mill of eliminating of frame exports the wedge shape deviation

And ${\mathrm{\Δ\; C}}_M^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\·{\mathrm{\Δ\; Wedge}}_M^{\mathrm{MEAS}}\left(T\right)$

This step is specially:

At first, plate shape set-up and calculated is calculated each frame export goal band convexity and is obtained finish rolling export goal band convexity

With target frame outlet band convexity

And go out unit band convexity COEFFICIENT K by computes _i,

$\frac{C_i^{\mathrm{REF}}}{h_i}=K_i\·\frac{C_M^{\mathrm{REF}}}{h_M}$

Wherein, h _MBe the finish rolling exit thickness, it is a milling train set-up and calculated value, and i is a shelf number, and i=1,2 ... M, M are natural numbers;

Secondly; Pass through following formula; Be distributed to each finishing stand through finishing mill outlet band wedge shape deviation

; Promptly

$\frac{\mathrm{\Δ}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\·\frac{\mathrm{\Δ}{C}_M^{\mathrm{Wedge}}\left(T\right)}{h_M}$

Wherein,

is i frame outlet band wedge shape correction value;

(5) each frame roll gap of leveling control: roll gap leveling value Δ L can be drawn by following formula, that is,

$\mathrm{\Δ}{C}_i^{\mathrm{Wedge}}\left(T\right)={\mathrm{\α}}_i^L\left(T\right)\·\mathrm{\ΔL}+{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^{\mathrm{Wedge}}\left(T\right)$

Wherein,

Be the influence coefficient of strip edge place roll gap leveling to the band wedge shape, η _i(T) be that the band wedge shape is inherited coefficient, each finishing stand is according to gained roll gap leveling value Δ L adjustment roller gap;

Via above-mentioned steps, accomplish wedge shape adjustment work.

In this method, the roll gap leveling value of all finishing stands is stored as the roll gap preset value of next piece band steel, all roll gap leveling value automatic clears behind mill roll automatically when lastblock band steel carries out back-end crop.

The process of the automatic convexity control of said realization is:

(1) band convex measuring and control: when the band head arrives the finishing mill outlet; Band plate shape, wedge shape and convexity are carried out timing and are measured; And calculate the data mean value of band plate shape, wedge shape and convexity immediately by a convexity and/or wedge shape control device; Wherein, the measured value mean value

of finish rolling outlet band convexity is drawn by following formula:

$C_M^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}$

In the following formula;

is the strip width center thickness value of measuring;

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and

is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(2) last frame band convexity deviation calculation: go out finish rolling outlet band convexity deviation

promptly according to computes

$\mathrm{\Δ}{C}_{\left(M\right)}^R\left(T\right)=C_M^{R,\mathrm{MEAS}}\left(T\right)-C_M^{R,\mathrm{REF}}\left(T\right)$

Wherein,

is target finish rolling outlet band convexity;

(3) the convexity deviation is distributed: finish rolling is exported band convexity deviation

be assigned to each frame through following formula; Promptly

$\frac{\mathrm{\Δ}{C}_i^R\left(T\right)}{h_i}=K_i\·\frac{\mathrm{\Δ}{C}_M^R\left(T\right)}{h_M}$

Wherein, i is a shelf number, and i=1,2 ... M, M are natural numbers, h _iBe i frame outlet thickness of strip, K _iBe ratio convexity coefficient,

Be each frame outlet band convexity correction value,

It also is finish rolling outlet band convexity correction value;

(4) each frame working roller bending power adjustment:

By each frame working roller bending power controlling value Δ F of computes _i(ton/side):

${\mathrm{\ΔF}}_i=\frac{1}{{\mathrm{\α}}_i^B\left(T\right)}\·(\mathrm{\Δ}{C}_i^R\left(T\right)-{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^R\left(T\right))$

And $\mathrm{\Δ}{C}_i^R\left(T\right)={\mathrm{\α}}_i^B\left(T\right)\·{\mathrm{\Δ\; F}}_i+{\mathrm{\η}}_i\left(T\right)\·\mathrm{\Δ}{C}_{(i-1)}^R\left(\text{T}\right)$

Wherein,

is the influence coefficient of band convexity to working roller bending power; η (T) is that the band convexity is inherited coefficient, substitution

$\mathrm{\Δ}{F}_i^{\mathrm{CTL}}={\mathrm{\ΔF}}_i$

The work roll bending system that promptly draws each each frame of frame working roller bending power controlling value

is working roller bending power controlling value adjustment work roll bending power by this;

Via above-mentioned steps, accomplish convexity adjustment work.

The present invention is through setting up from first finishing stand to a last finishing stand (F in hot rolled in series type rolling machine ₁To F _M) working roller bending and the FEEDBACK CONTROL of roll gap leveling; Realized full-automatic band convexity (wedge shape) control; Promptly on output strip line, set up ASCC (automatic strip crown (wedge) control system, strip profile (wedge shape) control system automatically) model.In the operation of rolling, the ASCC model relatively must deviate with the target wedge shape after detecting band gad shape, utilizes the comprehensive computing and the control device of system to rectify a deviation, and sets up from F ₁To F _MThe staged method of adjustment, thereby make the response maximization of FEEDBACK CONTROL, to correct band gad shape, guarantee the good glacing flatness of product, prevent with the serpentine locomotion of steel in each frame, guarantee production safety; Simultaneously, in the operation of rolling, the ASCC model is after the deviation that compares actual ratio convexity and target proportion convexity, and the Comprehensive Control means that make full use of system are rectified a deviation, and set up from F ₁To F _MThe staged method of adjustment, thereby make the response maximization of FEEDBACK CONTROL, thereby eliminate the existing single drawback of convexity control device, the relation of overall balance convexity and glacing flatness.The present invention can guarantee the convexity precision and the wedge shape of long axis direction, improves glacing flatness, guarantees product quality and production safety, and can effectively improve steel rolling mill's economic benefit.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further.

Shown in Figure 1 is the structural representation that is provided with 7 frame tandem output strip line mm finishing mill unit of automatic strip profile (wedge shape) control system (ASCC);

Fig. 2 is an ASCC output type sketch map;

Fig. 3 is a band convexity structural representation;

Fig. 4 is the block diagram that concerns of ASCC and the calculating of other finishing mill functions;

Fig. 5 is the input and output sketch map of ASCC;

Fig. 6 is the roll gap leveling value of ASCC output and the schematic flow sheet that work roll bending power value is participated in current control.

The specific embodiment

With one of the present invention preferred embodiment content of the present invention is described as follows, the attempt tool is to do any formal restriction to the present invention but this embodiment is not.

As shown in Figure 1; Present embodiment relates to a kind of 7 frame (F1 to F7) tandem output strip line mm finishing mill unit; Its finish rolling exit is provided with plate profile instrument; Plate profile instrument is connected with ASCC (can be a programmable logic controller (PLC) PLC), simultaneously, this ASCC also with each finishing stand in the work roll bending Adjustment System be connected with the roller gap Adjustment System.

This ASCC stop and start process is: when the band head arrived the plate profile instrument in finishing mill exit, ASCC started working, and ASCC quits work when the band afterbody is cut by flying shear.

The output of this ASCC has two types: first frame F1, and F2 ..., F5, F6, the roll gap leveling value of F7; It two is frame F1, F2 ..., F5, F6, the work roll bending power value of F7.

When band steel toe portion arrives the plate profile instrument of finishing mill outlet, an organic frame F1, F2 ..., F5, F6, the work roll bending Lik-Sang of F7 are imitated (and roll gap leveling control is invalid, only arrives downcoiler and builds Zhang Houcai at the band steel and come into force, and prevents strip running deviation).

The band steel is after coiling machine is built, and all control functions of ASCC come into force, and just the roll gap leveling controlling value of all mm finishing mill unit and working roller bending power controlling value come into force, and milling train is adjusted control, after band steel afterbody is by the flying shear shearing, stop.

The selection of above-mentioned two kinds of outputs is controlled by following switch:

As shown in Figure 2, SW-1 and SW-2 are respectively roll gap leveling and the control master switch of work roll bending power in the ASCC function; SW-3 is a roll gap leveling gauge tap, and when the band head gets into undergroundly when curling, SW-3 is closed, and when the band afterbody was cut by flying shear, SW-3 broke off; SW-4 is a work roll bending power gauge tap, and when the band head arrived the plate profile instrument of finish rolling outlet, SW-4 was closed, and when the band afterbody was cut by flying shear, SW-4 broke off.

At first, the definition of convexity described in the present embodiment and wedge shape is described, it is as shown in Figure 3:

The band convexity $C^R=h_C-\frac{h_{\mathrm{WS}}+h_{\mathrm{DS}}}{2}---\left(1\right)$

Band wedge shape Wedge=h _WS-h _DS(mm) (2);

The following process of carrying out automatic wedge shape control and convexity control with this ASCC that specifies:

(step 1) influence coefficient and succession coefficient: shown in Fig. 4-5, the influence coefficient that ASCC needs will be stored ASCC (PLC) with the succession coefficient, and these influence coefficients and succession coefficient are by milling train, roll and band distortion calculated off line.

(step 2) ASCC imports data: finally accomplish milling train set-up and calculated (MSUC) and plate shape set-up and calculated (SSUC) afterwards, ASCC (PLC) from PDI, MSUC, SSUC receive following data and storage to ASCC.

(step 3) ASCC plate shape, wedge shape, convex measuring: when the band head arrived the plate profile instrument of finishing mill outlet, band plate shape, wedge shape and convexity were carried out the timing measurement, and ASCC (PLC) calculates the data mean value of band plate shape, wedge shape and convexity immediately,

(F ₇Outlet band wedge shape) ${\mathrm{\&Delta;\; <figure-callout\; id="7"\; label="Wedge"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">Wedge</figure-callout>}}_7^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)---\left(3\right)$

(F ₇Outlet wedge shape deviation) $\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">C</figure-callout>}}_7^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\&CenterDot;\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="Wedge"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">Wedge</figure-callout>}}_7^{\mathrm{MEAS}}\left(T\right)---\left(4\right)$

Wherein,

(mm) be F ₇The wedge shape deviation of outlet, desired value is 0 usually.

(step 4) wedge shape deviation is distributed: F ₇Outlet wedge shape deviation

(mm) through finishing mill F ₁-F ₇The horizontal adjustment of frame is eliminated, and concrete steps are:

At first, plate shape (convexity and glacing flatness) set-up and calculated (SSUC) will be calculated each frame export goal band convexity obtaining finish rolling export goal band convexity,

$\frac{C_i^{\mathrm{REF}}}{h_i}=K_i\&CenterDot;\frac{{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">C</figure-callout>}}_7^{\mathrm{REF}}}{h_7}---\left(5\right)$

Wherein,

Be finish rolling export goal band convexity (mm), h ₇Be finish rolling exit thickness (milling train set-up and calculated value), i is shelf number (1,2,3,4,5,6), K _iIt is unit band convexity coefficient.Calculate target frame outlet band convexity by (SSUC), the frame outlet thickness of strip that is calculated by (MSUC) draws K _i, for example, K _iDuring=1.0 (i=1,2,3,4,5,6), the C of all finishing mills _i/ h _iValue (i frame outlet convexity is removed exit thickness) is all identical, through equation (5), F ₇Outlet band wedge shape deviation

(mm) be dispersed to each finishing stand, that is exactly,

$\frac{\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">C</figure-callout>}}_7^{\mathrm{Wedge}}\left(T\right)}{h_7}---\left(6\right)$

Wherein, (i=1,2,3,4,5,6),

(mm) be i frame outlet band wedge shape correction value, in the end a frame F ₇, frame outlet wedge shape correction value is

(each frame roll gap leveling controlled quentity controlled variable of step 5): the basic wedge shape governing equation of roll gap leveling is:

$\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)={\mathrm{\&alpha;}}_i^L\left(T\right)\&CenterDot;\mathrm{\&Delta;L}+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^{\mathrm{Wedge}}\left(T\right)---\left(7\right)$

Wherein, i=1,2 ... .., 7

(mm): provide by equation (6),

Be that strip edge T (mm) locates the influence coefficient of roll gap leveling to the band wedge shape, η _i(T) be that the band wedge shape is inherited coefficient (for F ₁,

(mm) be the intermediate blank wedge shape), Δ L (mm) is a roll gap leveling value, wherein in the formula 7 other several known, can obtain Δ L;

According to above 1-5 step, the ASCC system accomplishes wedge shape adjustment work.

(step 6) band convex measuring and control: when the band head arrived the plate profile instrument of finishing mill outlet, band plate shape, wedge shape and convexity were carried out timing and are measured.ASCC (PLC) calculates the data mean value of band plate shape, wedge shape and convexity immediately, and the measured value mean value

of finish rolling outlet band convexity (mm) is

$C_7^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}---\left(8\right)$

Wherein,

is the width center thickness value of measuring (mm);

is the one-tenth-value thickness 1/10 that the active side widthwise edges T (mm) that measures locates (mm), and

is the transmission side widthwise edges one-tenth-value thickness 1/10 of measuring (mm).

(step 7) end frame F6 band convexity deviation calculation:, draw finish rolling outlet band convexity deviation

and (mm) be through equation (8)

$\mathrm{\&Delta;}{C}_{\left(7\right)}^R\left(T\right)=C_7^{R,\mathrm{MEAS}}\left(T\right)-C_7^{R,\mathrm{REF}}\left(T\right)---\left(9\right)$

Wherein, (mm) be target (REF, reference) F ₇Outlet band convexity.

(step 8) convexity deviation is distributed: F ₇Frame outlet band convexity deviation is eliminated through the work roll bending power of adjustment institute organic frame.This is most important to keeping good strip profile and flatness, so, the ratio convexity COEFFICIENT K of step 4 equation (5) lining definition _iExtremely important, finish rolling outlet band convexity deviation

(mm) be assigned to each finishing stand through equation (5),

$\frac{\mathrm{\&Delta;}{C}_i^R\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_7^R\left(T\right)}{h_7}---\left(10\right)$

Wherein, shelf number be (i=1,2,---, 6) .h (mm) is frame outlet thickness of strip, K _iRatio convexity coefficient, each frame outlet band convexity correction value

(mm) can calculate F through equation (10) ₇Outlet band convexity correction value is

(mm).

(each frame working roller bending power adjusted value of step 9): each frame working roller bending power controlling value Δ F _i(ton/side) by following formula decision:

$\mathrm{\&Delta;}{C}_i^R\left(T\right)={\mathrm{\&alpha;}}_i^B\left(T\right)\&CenterDot;{\mathrm{\&Delta;F}}_i+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(\text{T}\right)---\left(11\right)$

Wherein, shelf number be (i=1,2,---6,7),

Be the influence coefficient of band convexity to working roller bending power, η (T) is that the band convexity is inherited coefficient; In equation (11),

Provide (supposition intermediate blank ratio convexity is changed to 0) by equation (10), so, each working roller bending power controlling value Δ F _i(ton/side) be,

${\mathrm{\&Delta;F}}_i=\frac{1}{{\mathrm{\&alpha;}}_i^B\left(T\right)}\&CenterDot;(\mathrm{\&Delta;}{C}_i^R\left(T\right)-{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(\text{T}\right))---\left(12\right)$

Wherein, shelf number be (i=1,2,---6,7),

Substitution $\mathrm{\&Delta;}{F}_i^{\mathrm{CTL}}={\mathrm{\&Delta;\; F}}_i---\left(13\right).$

Need to prove each frame working roller bending power controlling value

(i=1; 2;--6,7) can be stored among the ASCC.

As shown in Figure 6, roll gap leveling control output is added into the control of hydraulic pressure roll gap, and the control of work roll bending power is added into the work roll bending Adjustment System.

In the said process, when the band head arrives the plate profile instrument of finish rolling outlet, carry out the first round and measure; Such as, can adopt per second to measure the mode of band wedge shape and convexity, measure three times; The calculation control value, and at once these controlling values are joined milling train, wait to be controlled coming into force then;

, some tracking Control points on band are set thereafter, as, for tracking Control point F1; When it arrived soon after the plate profile instrument of finish rolling outlet, second wheel measurement began, and survey once each second; Measure three times altogether, and calculate controlling value, these controlling values also are added into milling train subsequently at once;

Similarly, these measurements and control (from step-3 to step-11) constantly repeats to be cut by flying shear up to the intermediate blank afterbody.

Need to prove that during ASCC came into force, if the operative employee wants the leveling of manual intervention roll gap, ASCC output kept (not increasing output) always.After manual intervention was accomplished, ASCC output was provided to milling train.

Simultaneously, control assembly and plate profile instrument etc. are to adopt interlock to link in ASCC and the finishing mill, have only when following condition satisfies, and ASCC exports in opened condition:

Finishing mill is not rolling (having roll change); The roller gap Adjustment System of finish rolling institute organic frame is normal; The work roll bending Adjustment System of finish rolling institute organic frame is normal; The plate profile instrument of finish rolling outlet is normal; Milling train set-up and calculated (roll gap, roller speed) is a normal termination; Plate shape set-up and calculated (CVC string roller, working roller bending) is a normal termination.

In addition, ASCC has roll gap leveling value memory and base and base learning functionality, i.e. the organic frame F1 of finish rolling institute; F2 ... F6; The roll gap leveling value of F7 is stored as the roll gap preset value of piece steel down when carrying out back-end crop automatically at the band steel, but behind mill roll all roll gap leveling value automatic clears.

Below further specify technical scheme of the present invention for example with a kind of belt steel rolling technology of specification:

Suppose that rolling specs is following:

Steel grade	Width	Thickness	Barrel length	The wedge shape permissible variation	Convexity permissible variation (F 7Outlet)
						SS400	1250mm	2.5mm	1700mm	0	0.03±0.005mm

[0162]The rolling procedure table is set by following:

?

bar

F1

F2

F3

F4

F5

F6

F7

Thickness (mm)

40.00

21.60

12.25

7.16

4.55

3.16

2.36

2.00

Reduction ratio (%)

?

46.00％

43.30％

41.50％

36.50％

30.50％

25.50％

15.00％

Then: (1) wedge shape is controlled calculating automatically

Suppose F ₇Exporting detected band gad shape is

According to above formula, need the leveling value be assigned to each frame, according to calculation procedure calculation of the present invention as follows:

(F ₇Outlet band wedge shape) ${\mathrm{\&Delta;\; <figure-callout\; id="7"\; label="Wedge"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">Wedge</figure-callout>}}_7^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)=0.05\mathrm{Mm}---\left(3\right)$

(F ₇Outlet wedge shape deviation) $\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">C</figure-callout>}}_7^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="Wedge"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">Wedge</figure-callout>}}_7^{\mathrm{MEAS}}\left(T\right)=0.025\mathrm{Mm}---\left(4\right)$

Above wedge shape deviation will be assigned to each frame by following formula adjustment:

For F ₁Frame is made as 0 to the intermediate blank wedge shape, draws from equation (7) then

$\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">C</figure-callout>}}_1^{\mathrm{Wedge}}\left(T\right)={\mathrm{\&alpha;}}_1^L\left(T\right)\&CenterDot;{\mathrm{\&Delta;<figure-callout\; id="1"\; label="L"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">L</figure-callout>}}_1$

(mm) drawn by equation (6)

$\frac{\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="HSA00000195955000041.png"\; state="\{\{state\}\}">C</figure-callout>}}_7^{\mathrm{Wedge}}\left(T\right)}{h_7}---\left(6\right)$

Suppose K _iBe 1.1

$\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">C</figure-callout>}}_1^{\mathrm{Wedge}}\left(T\right)=21.6\&times;1.1\&times;0.025\&divide;2.0=0.297\mathrm{mm}$

Roll gap leveling controlling value Δ L so ₁(mm) be (supposition

)

$\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">L</figure-callout>}}_1=\frac{1}{a_1^L\left(T\right)}\&CenterDot;\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">C</figure-callout>}}_1^{\mathrm{Wedge}}\left(T\right)=1.5\&times;0.297=0.39\mathrm{mm}---\left(8\right)$

Substitution $\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^{\mathrm{CTL}}={\mathrm{\&Delta;\; <figure-callout\; id="1"\; label="L"\; filenames="HSA00000195955000021.png"\; state="\{\{state\}\}">L</figure-callout>}}_1=0.39\mathrm{Mm}---\left(9\right)$

At K _i,

Under the known situation of coefficient,, can obtain the roll gap leveling value of other sorties of finishing mill according to above calculation procedure.

(2) convexity is controlled calculating automatically

Suppose F ₇Exporting detected strip profile is

According to above formula, need the convexity adjusted value be assigned to each frame, according to calculation procedure calculation of the present invention as follows:

The measured value mean value

of finish rolling outlet band convexity (mm) is

$C_7^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}=0.045---\left(17\right)$

Through equation (17), draw finish rolling outlet band convexity deviation

and (mm) be

$\mathrm{\&Delta;}{C}_7^R\left(T\right)=C_7^{R,\mathrm{MEAS}}\left(T\right)-C_7^{R,\mathrm{REF}}\left(T\right)=0.045-0.035=0.01\mathrm{mm}---\left(18\right)$

Finish rolling outlet band convexity deviation 0.01 (mm) is assigned to each finishing stand through equation (19)

$\frac{\mathrm{\&Delta;}{C}_i^R\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_7^R\left(T\right)}{h_7}---\left(19\right)$

As want to obtain F ₁The convexity regulated quantity, suppose K ₁=1.0, then

F ₁Convexity regulated quantity=21.6 ÷, 2.0 * 1.0 * 0.01=0.108mm

As be converted to bending roller force, then according to following formula:

$\mathrm{\&Delta;}{C}_i^R\left(T\right)={\mathrm{\&alpha;}}_i^B\left(T\right)\&CenterDot;{\mathrm{\&Delta;F}}_i+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right)---\left(20\right)$

In equation (20), calculated-0.108mm (supposition intermediate blank ratio convexity is changed to 0) by equation (19).

So, each working roller bending power controlling value Δ F _i(ton/side) be,

$\mathrm{\&Delta;}{F}_i=\frac{1}{{\mathrm{\&alpha;}}_i^B\left(T\right)}\&CenterDot;(\mathrm{\&Delta;}{C}_i^R\left(T\right)-{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right))---\left(21\right)$

Suppose F ₁The influence coefficient of strip profile breaker roll convexity be-0.00035mm/KN, then:

$\mathrm{\&Delta;}{F}_i^{\mathrm{CTL}}=\mathrm{\&Delta;}{F}_i=\frac{1}{{\mathrm{\&alpha;}}_i^B\left(T\right)}\&times;\mathrm{\&Delta;}{C}_i^R\left(T\right)=(-0.108\mathrm{mm})\&divide;(-0.00035\mathrm{mm}/\mathrm{KN})=309\mathrm{KN}---\left(22\right)$

According to more than, work as F ₇When exporting the convexity deviation of appearance+0.01mm, need F ₁Carry out just curvedly, bending roller force is the 309KN/ side.Bending roller force adjustment as for other frames is obtained the bending roller force adjusted value when frame according to formula and coefficient correlation.

The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (10)

1. the convexity of a hot rolled in series type rolling machine and/or wedge shape automatic control system; In the hot rolled in series type rolling machine that its several finishing stands that are applied to mainly to be provided with by series connection are formed; All be equipped with work roll bending Adjustment System and roller gap Adjustment System on each finishing stand, it is characterized in that:

Said convexity and/or wedge shape automatic control system comprise convexity and/or wedge shape control device, and work roll bending Adjustment System on said convexity and/or wedge shape control device and each finishing stand and roller gap Adjustment System and the band plate shape that is arranged on the finish rolling outlet and wedge shape and/or convex measuring device are connected respectively;

And; Band plate shape that said convexity and/or wedge shape control device can regularly record according to band plate shape and wedge shape and/or convex measuring device and wedge shape and/or convexity data and target wedge shape and/or convexity data are the gained difference relatively; Through the roll gap and the work roll bending power of the work roll bending Adjustment System on each finishing stand and each finishing stand of roller gap Adjustment System adjustment, be implemented in the automatic convexity and/or the wedge shape control of the long axis direction of band;

Further, the process of the automatic wedge shape control of the said long axis direction that is implemented in band is:

(1) influence coefficient and succession coefficient are imported in advance: be out of shape the calculated off line influence coefficient and inherit coefficient according to milling train, roll and band, and these influence coefficients and succession coefficient are imported convexity and/or wedge shape control device;

(2) convexity and/or wedge shape control device input data: accomplish milling train set-up and calculated and plate shape set-up and calculated, afterwards with gained result of calculation and band characteristic information input convexity and/or wedge shape control device;

(3) convexity and/or wedge shape control device plate shape; Wedge shape; Convex measuring: when the band head arrives the finishing mill outlet, regularly measure band plate shape, wedge shape and convexity, convexity and/or wedge shape control device calculate the data mean value of band plate shape, wedge shape and convexity immediately; Wherein, Finishing mill outlet band wedge shape

is drawn by following formula, promptly

$\mathrm{\&Delta;}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)$

Wherein,

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(4) the wedge shape deviation is distributed: through horizontal adjustment finishing mill F ₁-F _MThe finishing mill of eliminating of frame exports the wedge shape deviation

And $\mathrm{\&Delta;}{C}_M^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\&CenterDot;\mathrm{\&Delta;}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)$

This step is specially:

At first, plate shape set-up and calculated is calculated each frame export goal band convexity and is obtained finish rolling export goal band convexity

With target frame outlet band convexity

And go out unit band convexity COEFFICIENT K by computes _i,

$\frac{C_i^{\mathrm{REF}}}{h_i}=K_i\&CenterDot;\frac{C_M^{\mathrm{REF}}}{h_M}$

Wherein, h _MBe the finish rolling exit thickness, it is a milling train set-up and calculated value, and i is a shelf number, and i=1,2 ... M, M are natural numbers;

Secondly; Pass through following formula; Be distributed to each finishing stand through finishing mill outlet band wedge shape deviation

; Promptly

$\frac{\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_M^{\mathrm{Wedge}}\left(T\right)}{h_M}$

Wherein,

is i frame outlet band wedge shape correction value;

(5) each frame roll gap of leveling control: roll gap leveling value Δ L can be drawn by following formula, that is,

$\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)={\mathrm{\&alpha;}}_i^L\left(T\right)\&CenterDot;\mathrm{\&Delta;L}+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^{\mathrm{Wedge}}\left(T\right)$

Wherein,

Be the influence coefficient of strip edge place roll gap leveling to the band wedge shape, η _i(T) be that the band wedge shape is inherited coefficient, each finishing stand is according to gained roll gap leveling value Δ L adjustment roller gap;

Via above-mentioned steps, accomplish wedge shape adjustment work;

The process that the said automatic convexity that is implemented in the long axis direction of band is controlled is:

(1) band convex measuring and control: when the band head arrives the finishing mill outlet; Band plate shape, wedge shape and convexity are carried out timing and are measured; And calculate the data mean value of band plate shape, wedge shape and convexity immediately by convexity and/or wedge shape control device; Wherein, the measured value mean value

of finish rolling outlet band convexity is drawn by following formula:

$C_M^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}$

In the following formula;

is the strip width center thickness value of measuring;

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and

is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(2) last frame band convexity deviation calculation: go out finish rolling outlet band convexity deviation

promptly according to computes

$\mathrm{\&Delta;}{C}_{\left(M\right)}^R\left(T\right)=C_M^{R,\mathrm{MEAS}}\left(T\right)-C_M^{R,\mathrm{REF}}\left(T\right)$

Wherein, is target finish rolling outlet band convexity;

(3) the convexity deviation is distributed: finish rolling is exported band convexity deviation be assigned to each frame through following formula; Promptly

$\frac{\mathrm{\&Delta;}{C}_i^R\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_M^R\left(T\right)}{h_M}$

Wherein, i is a shelf number, and i=1,2 ... M, M are natural numbers, h _iBe i frame outlet thickness of strip, K _iBe ratio convexity coefficient,

Be each frame outlet band convexity correction value,

It also is finish rolling outlet band convexity correction value;

(4) each frame working roller bending power adjustment:

By each frame working roller bending power controlling value Δ F of computes _i:

$\mathrm{\&Delta;}{F}_i=\frac{1}{{\mathrm{\&alpha;}}_i^B\left(T\right)}\&CenterDot;(\mathrm{\&Delta;}{C}_i^R\left(T\right)-{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right))$

And $\mathrm{\&Delta;}{C}_i^R\left(T\right)={\mathrm{\&alpha;}}_i^B\left(T\right)\&CenterDot;\mathrm{\&Delta;}{F}_i+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right)$

Wherein,

is the influence coefficient of band convexity to working roller bending power; η (T) is that the band convexity is inherited coefficient, substitution

$\mathrm{\&Delta;}{F}_i^{\mathrm{CTL}}=\mathrm{\&Delta;}{F}_i$

The work roll bending system that promptly draws each each frame of frame working roller bending power controlling value

is working roller bending power controlling value adjustment work roll bending power by this;

Via above-mentioned steps, accomplish convexity adjustment work.

2. the convexity of hot rolled in series type rolling machine according to claim 1 and/or wedge shape automatic control system is characterized in that: said convexity and/or wedge shape control device are connected with the work roll bending Adjustment System with the roller gap Adjustment System with work roll bending power gauge tap through roll gap leveling gauge tap respectively;

When the band head arrived the plate profile instrument measurement mechanism, work roll bending power gauge tap was closed, and the work roll bending Adjustment System is started working, and when the band afterbody was cut by flying shear, work roll bending power gauge tap broke off, and the work roll bending Adjustment System quits work;

When the band head gets into underground curling, and when building, roll gap leveling gauge tap is closed, and the roller gap Adjustment System is started working, and when the band afterbody was cut by flying shear, roll gap leveling gauge tap broke off, and the roller gap Adjustment System quits work.

3. the convexity of hot rolled in series type rolling machine according to claim 2 and/or wedge shape automatic control system is characterized in that: said roll gap leveling gauge tap is connected with said convexity and/or wedge shape control device through a control master switch respectively with work roll bending power gauge tap.

4. the convexity of hot rolled in series type rolling machine according to claim 1 and/or wedge shape automatic control system is characterized in that: all adopt interlock to connect between said convexity and/or wedge shape control device, band plate shape and wedge shape and/or convex measuring device, work roll bending Adjustment System and the roller gap Adjustment System.

5. according to the convexity and/or the wedge shape automatic control system of claim 1 or 4 described hot rolled in series type rolling machine, it is characterized in that: said band plate shape and wedge shape and/or convex measuring device comprise plate profile instrument, wedge shape and/or convex measuring instrument.

6. according to the convexity and/or the wedge shape automatic control system of each described hot rolled in series type rolling machine in the claim 1～4, it is characterized in that: said convexity and/or wedge shape control device adopt programmable logic controller (PLC).

7. the convexity of a hot rolled in series type rolling machine and/or wedge shape autocontrol method is characterized in that, this method is:

In the belt steel rolling process; Strip crown and/or wedge shape are carried out detection of dynamic; And detected strip crown and/or wedge shape and target convexity and/or target wedge shape compared; According to the deviate of actual strip profile and/or wedge shape and target convexity and/or target wedge shape, adjust roller gap and work roll bending power in each finishing mill respectively again, realize automatic glacing flatness and the convexity and/or the wedge shape control of rolled piece on long axis direction;

Further, the process of the automatic wedge shape control of said realization is:

(1) influence coefficient and succession coefficient are imported in advance: be out of shape the calculated off line influence coefficient and inherit coefficient according to milling train, roll and band, and these influence coefficients and succession coefficient are imported a convexity and/or wedge shape control device;

(2) convexity and/or wedge shape control device input data: accomplish milling train set-up and calculated and plate shape set-up and calculated, afterwards with gained result of calculation and band characteristic information input convexity and/or wedge shape control device;

(3) convexity and/or wedge shape control device plate shape; Wedge shape; Convex measuring: when the band head arrives the finishing mill outlet, regularly measure band plate shape, wedge shape and convexity, convexity and/or wedge shape control device calculate the data mean value of band plate shape, wedge shape and convexity immediately; Wherein, Finishing mill outlet band wedge shape

is drawn by following formula, promptly

$\mathrm{\&Delta;}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)=h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)-h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)$

Wherein,

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and

is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(4) the wedge shape deviation is distributed: through horizontal adjustment finishing mill F ₁-F _MThe finishing mill of eliminating of frame exports the wedge shape deviation

And $\mathrm{\&Delta;}{C}_M^{\mathrm{Wedge}}\left(T\right)=\frac{1}{2}\&CenterDot;\mathrm{\&Delta;}{\mathrm{Wedge}}_M^{\mathrm{MEAS}}\left(T\right)$

This step is specially:

At first, plate shape set-up and calculated is calculated each frame export goal band convexity and is obtained finish rolling export goal band convexity

With target frame outlet band convexity

And go out unit band convexity COEFFICIENT K by computes _i,

$\frac{C_i^{\mathrm{REF}}}{h_i}=K_i\&CenterDot;\frac{C_M^{\mathrm{REF}}}{h_M}$

Wherein, h _MBe the finish rolling exit thickness, it is a milling train set-up and calculated value, and i is a shelf number, and i=1,2 ... M, M are natural numbers;

Secondly; Pass through following formula; Be distributed to each finishing stand through finishing mill outlet band wedge shape deviation

; Promptly

$\frac{\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_M^{\mathrm{Wedge}}\left(T\right)}{h_M}$

Wherein,

is i frame outlet band wedge shape correction value;

(5) each frame roll gap of leveling control: roll gap leveling value Δ L can be drawn by following formula, that is,

$\mathrm{\&Delta;}{C}_i^{\mathrm{Wedge}}\left(T\right)={\mathrm{\&alpha;}}_i^L\left(T\right)\&CenterDot;\mathrm{\&Delta;L}+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^{\mathrm{Wedge}}\left(T\right)$

Wherein,

Be the influence coefficient of strip edge place roll gap leveling to the band wedge shape, η _i(T) be that the band wedge shape is inherited coefficient, each finishing stand is according to gained roll gap leveling value Δ L adjustment roller gap;

Via above-mentioned steps, accomplish wedge shape adjustment work;

The process of the automatic convexity control of said realization is:

(1) band convex measuring and control: when the band head arrives the finishing mill outlet; Band plate shape, wedge shape and convexity are carried out timing and are measured; And calculate the data mean value of band plate shape, wedge shape and convexity immediately by a convexity and/or wedge shape control device; Wherein, the measured value mean value

of finish rolling outlet band convexity is drawn by following formula:

$C_M^{R,\mathrm{MEAS}}\left(T\right)=h_C^{\mathrm{MEAS}}-\frac{h_{\mathrm{WS}}^{\mathrm{MEAS}}\left(T\right)+h_{\mathrm{DS}}^{\mathrm{MEAS}}\left(T\right)}{2}$

In the following formula;

is the strip width center thickness value of measuring;

is the one-tenth-value thickness 1/10 at the band active side widthwise edges place that measures, and

is the band transmission side widthwise edges one-tenth-value thickness 1/10 of measuring;

(2) last frame band convexity deviation calculation: go out finish rolling outlet band convexity deviation

promptly according to computes

$\mathrm{\&Delta;}{C}_{\left(M\right)}^R\left(T\right)=C_M^{R,\mathrm{MEAS}}\left(T\right)-C_M^{R,\mathrm{REF}}\left(T\right)$

Wherein,

is target finish rolling outlet band convexity;

(3) the convexity deviation is distributed: finish rolling is exported band convexity deviation

be assigned to each frame through following formula; Promptly

$\frac{\mathrm{\&Delta;}{C}_i^R\left(T\right)}{h_i}=K_i\&CenterDot;\frac{\mathrm{\&Delta;}{C}_M^R\left(T\right)}{h_M}$

Wherein, i is a shelf number, and i=1,2 ... M, M are natural numbers, h _iBe i frame outlet thickness of strip, K _iBe ratio convexity coefficient,

Be each frame outlet band convexity correction value,

It also is finish rolling outlet band convexity correction value;

(4) each frame working roller bending power adjustment:

By each frame working roller bending power controlling value Δ F of computes _iΔ F _i(ton/side):

$\mathrm{\&Delta;}{F}_i=\frac{1}{{\mathrm{\&alpha;}}_i^B\left(T\right)}\&CenterDot;(\mathrm{\&Delta;}{C}_i^R\left(T\right)-{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right))$

And $\mathrm{\&Delta;}{C}_i^R\left(T\right)={\mathrm{\&alpha;}}_i^B\left(T\right)\&CenterDot;\mathrm{\&Delta;}{F}_i+{\mathrm{\&eta;}}_i\left(T\right)\&CenterDot;\mathrm{\&Delta;}{C}_{(i-1)}^R\left(T\right)$

Wherein, is the influence coefficient of band convexity to working roller bending power; η (T) is that the band convexity is inherited coefficient, substitution

$\mathrm{\&Delta;}{F}_i^{\mathrm{CTL}}=\mathrm{\&Delta;}{F}_i$

The work roll bending system that promptly draws each each frame of frame working roller bending power controlling value

is working roller bending power controlling value adjustment work roll bending power by this;

Via above-mentioned steps, accomplish convexity adjustment work.

8. the convexity and/or the wedge shape autocontrol method of hot rolling formula tandem milling train according to claim 7; It is characterized in that: when the band head arrives the plate profile instrument measurement mechanism; Begin to carry out the adjustment of work roll bending power; When the band afterbody is cut by flying shear, the roller bending roller force that quits work adjustment, thus realize automatic convexity control.

9. the convexity and/or the wedge shape autocontrol method of hot rolling formula tandem milling train according to claim 8; It is characterized in that: when the band head gets into underground curling; And when building, begin to carry out the roller gap adjustment, when the band afterbody is cut by flying shear; Stop the roller gap adjustment, thereby realize automatic wedge shape control.

10. the convexity and/or the wedge shape autocontrol method of hot rolling formula tandem milling train according to claim 7; It is characterized in that: in this method; The roll gap leveling value of all finishing stands;, lastblock band steel is stored as the roll gap preset value of next piece band steel when carrying out back-end crop automatically, all roll gap leveling value automatic clears behind mill roll.

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