CN105369033B - A kind of control method of continuous annealing furnace strip coiling - Google Patents

Abstract

A kind of control method of continuous annealing furnace strip coiling involved in the present invention, including：According to the species of the strip, the element of edge pattern three of strip is determined；Calculate first output gain related to edge pattern and be used as the first middle output valve；It is at a predetermined velocity base speed according to the described first middle output valve, the second output gain calculated with actual steel band velocity correlation is used as the second middle output valve；According to the described second middle output valve, using predetermined thickness as basic thickness, calculate threeth output gain related to actual thickness of strips and be used as output signal calculated value；The departure of the center line of the distance between center line unit of strip is measured, the output signal calculated value and the strip is regard as final output value apart from the departure sum of the center line of unit；Hydraulic cylinder is controlled using final output value.The present invention can adapt to the actual conditions that the inhomogeneities and strip edge of strip steel coating are split, the shape of strip when dynamic control is batched.

Description

A kind of control method of continuous annealing furnace strip coiling

Technical field

The present invention relates to a kind of control method of continuous annealing furnace strip coiling.

Background technology

Penetrated into when continuous annealing furnace is produced by heating, atmosphere, soda acid the technique such as washes and strip is handled.Needed during production Coil of strip is subjected to uncoiling, batched after each road PROCESS FOR TREATMENT.The control batched is used as using volume together in the prior art Target, crimping precision general control within ± 1 millimeter, it is convenient after road unit processing, while preventing that strip is close to broken belt risk.

But some cold-rolled products very thin thickness such as only 0.2mm thickness or so, surface has coating material steel edge portion Difference is had with strip center thickness, and because strip is thin there is side to split phenomenon, the strip situation of edge is poor.If according to The neat control of volume because the relation of edge and center thickness difference, the pressure with steel layer and interlayer center and edge can occur it is inconsistent, So that coil of strip gradually produces interior bulgy phenomenon, cause to roll up difficult on subsequent processing, serious meeting causes the volume that collapses.Additionally, due to outer ring Stress is increased, and causes side to split phenomenon aggravation, the lumber recovery of unit is also brought greater impact.

The content of the invention

The present invention is that in order to solve the above-mentioned technical problem there is provided a kind of control method of continuous annealing furnace strip coiling, energy Enough adapt to the actual conditions that the inhomogeneities and strip edge of strip steel coating are split, the edge shape of strip when dynamic control is batched Shape.

A kind of control method of continuous annealing furnace strip coiling involved in the present invention, including：

The element of edge pattern three of strip, i.e. controlling cycle length, half of control week are determined according to the species of the strip The amount of taper of the stroke of strip and a controlling cycle inside gradient in phase；

According to the element of edge pattern three of the strip, the first output gain conduct related to the edge pattern is calculated First middle output valve Y1；

According to the described first middle output valve Y1, B is base speed at a predetermined velocity, is calculated and actual steel band velocity correlation The second output gain be used as the second middle output valve Y2；

According to the described second middle output valve Y2, using predetermined thickness C as basic thickness, calculate related to actual thickness of strips The 3rd output gain be used as output signal calculated value Y3；

Measure strip distance between center line batch the strip unit center line departure A1, by it is described output believe Number calculated value Y3 is used as final output value with the departure A1 sums；

The hydraulic cylinder in the unit is controlled using final output value Y4.

It is preferred that, the species according to the strip determines that the element of edge pattern three of strip is specially：Using advance The table of comparisons of preparation determines the element of edge pattern three of strip according to the species of the strip.

It is preferred that, the calculation formula of the first median Y1 is：

Y1=2H*x/S (x<=S/2)

Y1=H (S/2<x<=P/2-S/2)

Y1=2-*H/S*x+P*H/S (P/2-S/2<x<=P/2+S/2)

Y1=-H (P/2+S/2<x<=P-S/2)

Y1=2H*x/S+P*H/S (P-S/2<x<P)

Wherein, P is that observing and controlling Cycle Length, H are that the stroke of strip, S are a controlling cycle in half of controlling cycle The amount of taper of inside gradient, the current winding position that x is strip.

It is preferred that, the calculation formula of the second median Y2 is：

Y2=(V/B) * Y1

Wherein V is unit speed, and B is the predetermined speed.

It is preferred that, the calculation formula of the signal of change value Y3 is：

Y3=(T/C) * Y2

Wherein, T is actual thickness of strips, and C is the predetermined thickness.

It is preferred that, the calculation formula of the final output value Y4 is：

Y4=Y3+A1

Wherein, A1 batches the departure of the center line of the unit of the strip for the distance between center line of strip.

It is preferred that, the departure is detected by strip gage frame.

Using the control method of the continuous annealing furnace strip coiling of the present invention, the method batched by misalignment is batched, The interior bulgy phenomenon of coil of strip is eliminated, the side for alleviating strip is split, and the lumber recovery of unit is guaranteed, it is ensured that production direct motion.

Brief description of the drawings

Fig. 1 is the element schematic diagram of steel edge portion pattern three；

Fig. 2 be embodiment in continuous annealing furnace strip coiling control control system schematic diagram；

Fig. 3 be embodiment in continuous annealing furnace strip coiling control method control a part of logic diagram；

Fig. 4 be embodiment in continuous annealing furnace strip coiling control method control another part box Figure.

Embodiment

Hereinafter, embodiments of the present invention are illustrated with reference to accompanying drawing.

The trade mark of steel grade determines the pattern of edge, specifically as shown in table 1,

The trade mark

A1

A2

A3

A4

...

An

Edge pattern

G1

G2

G3

G4

...

Gn

The steel grade trade mark of table 1 and edge pattern corresponding table

And edge pattern can be characterized i.e. by three groups of parameters, P is that (hereinafter referred to as the cycle is long for observing and controlling Cycle Length Degree), stroke that H be strip in half of controlling cycle (hereinafter referred to as highly), the amount of taper that S is a controlling cycle inside gradient In (the hereinafter referred to as gradient), present embodiment, the edge pattern of the steel grade of the cited trade mark in table 1 can be by table 2 Design parameter data are represented.

The edge pattern of table 2 and the three element tables of comparisons

Specifically, the edge batched is a kind of waveform similar to sine wave, is understood with reference to Fig. 1, and P is the cycle of waveform, The strip of namely one controlling cycle batches length；H be waveform amplitude, that is, half period strip stretch out or contract The amount entered；S is the gradient, that is, a cycle inside gradient amount of taper.Pass through three above element, you can to determine what is batched Shape.

The control method of the continuous annealing furnace strip coiling of the present embodiment is said then in conjunction with Fig. 2, Fig. 3 and Fig. 4 It is bright.The structure of the control control system for the continuous annealing furnace strip coiling that present embodiment is used is as shown in Fig. 2 signal transacting list Member is to hydraulic cylinder transmission of control signals, the stroke for controlling hydraulic cylinder, i.e. control hydraulic cylinder is in the hydraulic cylinder shown in Fig. 2 Movement on moving direction, so as to realize the control of strip coiling.Strip gage frame detection strip departure A1 can be used, and By departure A1 output signal processing units.

Information process unit element of shape three first according to determined by Tables 1 and 2 is calculated under basic thickness, substantially The output gain related to edge pattern under speed is as the first middle output valve Y1, for the strip that the steel grade trade mark is An, Its computational methods is：

Y1=2Hn*x/Sn (x<=Sn/2)

Y1=Hn (Sn/2<x<=Pn/2-Sn/2)

Y1=2-*Hn/Sn*x+Pn*Hn/Sn (Pn/2-Sn/2<x<=Pn/2+Sn/2)

Y1=-Hn (Pn/2+Sn/2<x<=Pn-Sn/2)

Y1=2Hn*x/Sn+Pn*Hn/Sn (Pn-Sn/2<x<Pn)

Wherein, Hn be height, Sn be the gradient, the current winding position that Pn is Cycle Length, x is strip.That is, in the middle of first Particular location of the output valve Y1 computational methods according to residing for the current winding position x of strip is different, shows regional computer.

Then, according to the first above-mentioned middle output valve Y1, B is base speed at a predetermined velocity, is calculated and actual steel band Output gain related speed V is as the second middle output valve Y2, and calculation formula is：Y2=(V/B) * Y1.Here pre- constant speed It can be, for example, 100 meter per seconds or other values to spend B.

Afterwards, according to the second above-mentioned middle output valve Y2, using predetermined thickness C as basic thickness, actual steel band is calculated thick The output gain spent under T is as output signal calculated value Y3, and its calculation formula is：Y3=(T/C) * Y2.Here predetermined thickness C Can be, for example, 0.2mm or other values.

Now, strip gage frame measure strip distance between center line batch the strip unit center line deviation Measure as A1, and send signal processing unit to, signal processing unit using output signal calculated value Y3 and departure A1 sums as Final output value Y4, i.e. Y4=Y3+A1, and final output value Y4 is output to the hydraulic cylinder in unit, hydraulic cylinder according to this most Whole output valve Y4, is moved on the hydraulic cylinder moving direction shown in Fig. 2, it is achieved thereby that to continuous annealing furnace strip coiling Control.

According to the control method of the continuous annealing furnace strip coiling of present embodiment, the inequality of strip steel coating can adapt to The actual conditions that even property and strip edge split, the shape of strip when dynamic control is batched.The interior bulgy phenomenon of coil of strip is eliminated, The side for alleviating strip is split, and the lumber recovery of unit is guaranteed, it is ensured that production direct motion.

In addition, protection scope of the present invention is not limited to the content described in present embodiment, claim is not being departed from There can be various deformation under scope.

Claims (7)

1. a kind of control method of continuous annealing furnace strip coiling, it is characterised in that including：

The element of edge pattern three of strip, i.e. controlling cycle length are determined according to the species of the strip, in half of controlling cycle The amount of taper of the stroke of strip and a controlling cycle inside gradient；

According to the element of edge pattern three of the strip, calculate first output gain related to the edge pattern and be used as first Middle output valve Y1；

According to the described first middle output valve Y1, B is base speed at a predetermined velocity, calculates the with actual steel band velocity correlation Two output gains are used as the second middle output valve Y2；

According to the described second middle output valve Y2, using predetermined thickness C as basic thickness, related to actual thickness of strips the is calculated Three output gains are used as output signal calculated value Y3；

Measure strip distance between center line batch the strip unit center line departure A1, by the output signal meter Calculation value Y3 is used as final output value with the departure A1 sums；

The hydraulic cylinder in the unit is controlled using final output value Y4.

2. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that described according to the band The species of steel determines that the element of edge pattern three of strip is specially：Using the pre-prepd table of comparisons come the kind according to the strip Class determines the element of edge pattern three of strip.

3. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that first median Y1 calculation formula is：

Y1=2H*x/S (x<=S/2)

Y1=H (S/2<x<=P/2-S/2)

Y1=2-*H/S*x+P*H/S (P/2-S/2<x<=P/2+S/2)

Y1=-H (P/2+S/2<x<=P-S/2)

Y1=2H*x/S+P*H/S (P-S/2<x<P)

Wherein, P is that observing and controlling Cycle Length, H are that the stroke of strip, S are a controlling cycle manhole ladder in half of controlling cycle The amount of taper of degree, the current winding position that x is strip.

4. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that second median Y2 calculation formula is：

Y2=(V/B) * Y1

Wherein V is unit speed, and B is the predetermined speed.

5. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that the signal of change value Y3 calculation formula is：

Y3=(T/C) * Y2

Wherein, T is actual thickness of strips, and C is the predetermined thickness.

6. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that the final output value Y4 calculation formula is：

Y4=Y3+A1

Wherein, A1 batches the departure of the center line of the unit of the strip for the distance between center line of strip.

7. the control method of continuous annealing furnace strip coiling as claimed in claim 1, it is characterised in that pass through strip measurement frame Frame is detected to the departure.