CN107130199A - A kind of continuous hot galvanizing air knife knife is away from autocontrol method - Google Patents
A kind of continuous hot galvanizing air knife knife is away from autocontrol method Download PDFInfo
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- CN107130199A CN107130199A CN201610115522.5A CN201610115522A CN107130199A CN 107130199 A CN107130199 A CN 107130199A CN 201610115522 A CN201610115522 A CN 201610115522A CN 107130199 A CN107130199 A CN 107130199A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
Abstract
The present invention relates to a kind of continuous hot galvanizing air knife knife away from autocontrol method, using air knife knife away from coiling temperature setup, air knife knife away from the integrated control method of feedforward control and air knife knife away from feedback control, finally realize air knife knife away from automatically controlling.It is an advantage of the invention that：After applying this method in actual zinc-plated production, air knife knife causes thickness of coating precision to significantly improve away from accurate positioning with reference to air pressure control, while instead of live artificial operation knife away from reduction is under strip bowing state, risk of the air knife close to strip.
Description
Technical field
The present invention relates to a kind of continuous hot galvanizing air knife knife away from autocontrol method.
Background technology
With the rapid development of the national economy, China greatly develops automobile, household electrical appliances, the energy and urban infrastructure, to hot dip
The demand of zinc strip also constantly increases, and higher requirement is proposed to hot-dip galvanized steel strip product quality.Air knife is hot-galvanizing machine
One of important process equipment of group, for controlling the uniformity of zinc coating thickness, stationarity, the quality directly shadow of its control system
Ring the quality of zinc-plated finished product.See Fig. 1, strip substrate is after annealing furnace redox, and by zinc pot, its surface will
Adhere to liquid Zn, unnecessary zinc liquid is scraped and returns to zinc by the both sides air knife gas injection that then application is arranged along strip width direction
Pot, realizes zinc coating thickness control.Distance adjustment of the air knife away from strip is to control one of Main Means of thickness of coating, and it is right
The distribution influence of gas pressure is also larger.In the case where plate shape is good, the distance (air knife knife away from) of air knife and strip is smaller right
The stability contorting of coating is more favourable, for control thickness of coating, and most important is exactly the distance of accurate control air knife and strip.
When strip speed and constant air pressure, if necessary to relatively thin zinc layers, then air knife will be nearer from steel band, but existing at present
It is that manual hand manipulation is carried out by operative employee in some actual productions operation, due to the difference of personal operating experience, sometimes
Occur operation air knife away from strip distance it is too small, at this time strip in the case that plate shape is bad or weld seam by when, strip pole
Easily scratch and arrive knife lip, so as to cause strip cut or air knife to block, influence quality.
Galvanizing process is very complicated process, is to have many independent aggregation of variable to influence final thickness of coating bag together
Air pressure, air knife knife up etc. are included, but typically only considers those controllable changes for the angle of practical application from zinc-plated production
Amount includes air pressure and air knife away from belt steel surface distance.Because the purge gas pressure balance of strip both sides is difficult to adjust and protects
Hold, so when the position adjustments control device of air knife is working properly, and control accuracy within limits when, it is general first
First using air knife knife away from control method.Then air pressure is just combined only when position adjustments control device is not sufficiently stable to adjust
Method ensures thickness of coating precision jointly.Thus air knife knife is away from good with badly being influenceed very on thickness of coating precision away from control
Greatly, if air knife knife is high away from setting control accuracy, the system that can be avoided frequently regulation air pressure and cause is unstable.
《It is Chinese metallurgical》24 interim Liu have delivered one to state within 2014《Anshan iron and steel plant hot galvanizing line air knife control system constitute with
Functional analysis》, simple introduction only has been carried out away from adjustment mechanism composition to air knife knife in article, and briefly touched upon air knife
Executive mode of the knife away from control uses step motion control mode, and knife is not described away from automatically controlling related content.
The content of the invention
To overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of continuous hot galvanizing air knife knife away from the side of automatically controlling
Method, realizes air knife automatically controlling away from belt steel surface distance in galvanizing process, substitutes manual hand manipulation, improves zinc-plated production
Quality, reduces zinc consumption of raw materials.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of continuous hot galvanizing air knife knife is controlled using air knife knife away from autocontrol method away from coiling temperature setup, air knife knife away from feedforward
System and integrated control method of the air knife knife away from feedback control, are specifically included：
1) air knife knife is away from coiling temperature setup：In the case of no detection feedback, thickness of coating is controlled roughly；When
Strip steel weld joint reaches before air knife 0-60 seconds (being free of 0), and process computer is sent to air knife controller unit by main line PLC
Next coiled strip steel technological parameter data, before or after strip steel weld joint reaches air knife 0-15 seconds (being free of 0), start galvanizing gas
Knife knife exported away from default control unit air knife knife away from pre-set value；
Air knife knife is away from preset value：
In formula (1),For thickness margin value, alAnd blFor the long-term adaptive model coefficient of thickness of coating, WtarPlated for target
Thickness, Vk-1The ratio of the strip speed obtained for previous moment sampling, air pressure and air knife knife away from influence thickness of coating is R：
(1-R), DSETIt is air knife knife away from preset value；
2) air knife knife is away from feedforward control：When strip speed changes, while starting air knife knife away from feedforward control unit pair
Air knife knife is away from progress on-line prediction；Assuming that current time speed, air knife knife away from, air pressure, thickness of coating variable be respectively
V1、D1、P1、W1, and subsequent time variable is V2、D2、P2、W2；When strip speed is from V1It is changed into V2, then gas
Knife knife is away from feedforward control model equation below：
In formula (2), air pressure and air knife knife are divided into two parts away from adjustment, its ratio is in zinc coat thickness control
R:(1-R)；asAnd bsFor the short-term adaptive model coefficient of thickness of coating；△ V are strip speed changing value, and △ W are plating thickness
Spend changing value；
3) air knife knife is away from feedback control：When detecting the upper and lower overlay coating thickness difference of strip and deviation occur, then start
Air knife knife is away from feedback control unit, it is assumed that process section strip speed and air pressure it is constant be constant, now only take into account promoting the circulation of qi
Knife horizontal range feedback compensation, calculation formula of the air knife knife away from feedback control compensation amount is as follows：
In formula (3),To thickness of coating model formation：W=KVaDbPcThickness of coating is sought to air knife
Knife is obtained away from partial derivativeWherein K is model constants, and normal value is K=1, a, and b, c is that strip plates thick model certainly
Accommodation coefficient, W is thickness of coating, and V is strip speed, and P is air pressure, GDFor feedback control gain, WT、WB
For the upper and lower overlay coating thickness measured value of strip；
4) air knife knife away from boundary value setting：Knife is saved in process control computer number away from presetting a minimum value
According in storehouse, when knife is less than minimum value away from detected value, by Process Control System send instruction issue minimum value give air knife knife away from
Actuator, it is to avoid break air knife nozzle.
Described strip process supplemental characteristic includes target thickness, coating species, strip width, belt steel thickness.
Compared with prior art, the beneficial effects of the invention are as follows：
After applying this method in actual zinc-plated production, air knife knife controls to plate thickness away from accurate positioning with reference to air pressure
Degree precision is significantly improved, while instead of live artificial operation knife away from reducing under strip bowing state, air knife is close to strip
Risk.
Brief description of the drawings
Fig. 1 is air knife control schematic diagram.
Fig. 2 is air knife knife away from presetting schematic diagram (weld seam is before air knife).
Fig. 3 is air knife knife away from presetting schematic diagram (weld seam is after air knife).
Fig. 4 is application effect curve map one.
Fig. 5 is application effect curve map two.
In figure：On the 2- strip coating lower surfaces 3- of 1- strip coatings upper surface under air knife 4- on air knife 5- air knife knife away from
Air knife knife starts a roll of under the current strip 12- of presetting place 11- away from 7- strip 8- zinc pot 9- annealing furnaces 10- under 6-
Strip.
Embodiment
The present invention is described in detail with reference to Figure of description, it should be noted that the present invention implementation be not limited to
Under embodiment.
This example is carried out in certain continuous hot galvanizing line factory, and the product of production line orientates building appliance plate, Automobile Plate as,
Production technology is using improvement Sendzimir method, about 800,000 tons of annual production.Air knife is using Germany FOEN companies, production line
Equipment and electric and automatic control system are using SIEMENS companies of Germany.Galvanized layer thickness scope is 80-276g/m2, plate
A width of 1004~1256mm, strip speed excursion is 40~150m/min.
Specific implementation step such as Fig. 2：
Step 1, coating target thickness 80-276g/m is collected2In the range of sample data, carry out multiple linear regression calculating, root
Knife is obtained away from preset value according to equation below：
In formula (1), WtarPlate thick for target；For thickness margin value, the 4% of the thick value of target plating is typically taken as；VK-1For
The strip speed that previous moment sampling is obtained, al, blFor the long-term adaptive model coefficient of thickness of coating, different size plates thick
Long-term adaptive model coefficient value is as follows：
Here, thickness of coating change is due to the result of air pressure and air knife knife away from change, thus pressure and knife away from ratio
It is set to R:(1-R), R value setting ranges are：0<R<1.Here different size plating Deformation in thick is typically set to according to knowhow：
As shown in Fig. 2 when air knife knife is away from coiling temperature setup, to prevent thickness of coating change is excessive from causing overproof, using oblique
The presetting mode in slope, air knife knife away from coiling temperature setup follow following principle：
When coating change by it is thin thickening when, strip steel weld joint reach air knife before in 15 seconds adjust air knife knife away from, when coating change by
When thick thinning, strip steel weld joint reach adjusted after air knife in 15 seconds air knife knife away from.When presetting operation, zinc coat thickness control
Other control functions of system are locked.If the zinc coating thickness of the target thickness of next coiled strip steel and current strip is equal,
Preset functions are locked.
Step 2, when galvanizing process production strip speed changes, the zinc coating thickness of belt steel surface can also change,
Air knife knife must be adjusted in time away from keeping thickness of coating constant with air pressure.Assuming that current time variable is V1、D1、P1、
W1, and subsequent time variable is V2、D2、P2、W2.When strip speed is from V1It is changed into V2, zinc coating thickness will be from W1
It is changed into W2, then knife is recalculated away from knife now is away from feedforward computation model：
In formula, △ W are the thick changing value of plating, and △ V are strip speed changing value, asAnd bsFor the short-term adaptive mode of thickness of coating
Type coefficient, the short-term adaptive model coefficient value such as following table of thickness of coating：
Step 3, during actual plating is thick, (being more than during very big deviation occurs in strip upper and lower surface thickness of coating difference
1g/m2), deviation is eliminated by feedback control.From the angle of Industry Control, it is contemplated that the rapidity of control and
Feasibility, it is assumed that process section strip speed and air pressure it is constant be constant, now only take into account promoting the circulation of qi knife horizontal range feed back
Compensate, air knife knife is away from feedback control compensation amount calculation formula：
Wherein,
In formula, to thickness of coating model formation：W=KVaDbPcThickness of coating is asked to obtain air knife knife away from partial derivativeK is model constants, and value is 1, a, b, and c is that strip plates thick model adaptation coefficient, passes through multiple linear regression
Analysis is tried to achieve.WT、WBFor the upper and lower overlay coating thickness measured value of strip.The model adaptation coefficient of different size strip
For：
GDIt is as follows according to the different interval range values of the thick deviation of plating for feedback control gain：
Step 4, adjust knife away from when in order to avoid hypotelorism strip break air knife, to knife away from one minimum value of setting,
When knife is less than minimum value away from detected value, instruction sent by Process Control System issues minimum value and give air knife knife away from actuator,
Air knife knife is set as away from limit value：7mm.
Step 5, the knife of output is sent to knife distance control apparatus unit away from value, and knife distance control apparatus unit mainly includes stepping electricity
The devices such as machine controller, stepper motor, reductor, connecting rod, nut, leading screw, code-disc.Output valve gives stepper motor control
Device processed, is driven by it stepper motor, and motor drives leading screw to move again, makes air knife away from or closer to steel plate.
Application effect curve is as shown in Figure 3.Test manufacturing parameter as follows：Strip substrate thickness 0.80mm, strip width
1350mm, coating target thickness is by 276g/m2Change to 120g/m2, layer thickness meter is 140m, band apart from air knife
Steel speed 2m/s, sampling period T=0.1s.Because there is 77.5g/m in production process one side target thickness2Large change, now
Air knife knife is corrected away from 11mm is adjusted to from 19mm, control result makes upper and lower surface thickness of coating be respectively positioned on 60g/m2Within.
This method can guarantee that air pressure and knife away from can quick response transit time only 8.2s, eliminate due to process factors interference fringe
The thickness deviation come, it is ensured that actual (real) thickness and target thickness deviation are within 4%.
Claims (2)
1. a kind of continuous hot galvanizing air knife knife is away from autocontrol method, it is characterised in that using air knife knife away from coiling temperature setup,
Air knife knife is specifically included away from the integrated control method of feedforward control and air knife knife away from feedback control：
1) air knife knife is away from coiling temperature setup：In the case of no detection feedback, thickness of coating is controlled roughly；When
Strip steel weld joint reaches before air knife 0-60 seconds (being free of 0), and process computer is sent to air knife controller unit by main line PLC
Next coiled strip steel technological parameter data, before or after strip steel weld joint reaches air knife 0-15 seconds (being free of 0), start galvanizing gas
Knife knife exported away from default control unit air knife knife away from pre-set value；
Air knife knife is away from preset value：
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In formula (1),For thickness margin value, alAnd blFor the long-term adaptive model coefficient of thickness of coating, WtarPlated for target
Thickness, Vk-1The ratio of the strip speed obtained for previous moment sampling, air pressure and air knife knife away from influence thickness of coating is R：
(1-R), DSETIt is air knife knife away from preset value；
2) air knife knife is away from feedforward control：When strip speed changes, while starting air knife knife away from feedforward control unit pair
Air knife knife is away from progress on-line prediction；Assuming that current time speed, air knife knife away from, air pressure, thickness of coating variable be respectively
V1、D1、P1、W1, and subsequent time variable is V2、D2、P2、W2；When strip speed is from V1It is changed into V2, then gas
Knife knife is away from feedforward control model equation below：
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In formula (2), air pressure and air knife knife are divided into two parts away from adjustment, its ratio is in zinc coat thickness control
R:(1-R)；asAnd bsFor the short-term adaptive model coefficient of thickness of coating；△ V are strip speed changing value, and △ W are plating thickness
Spend changing value；
3) air knife knife is away from feedback control：When detecting the upper and lower overlay coating thickness difference of strip and deviation occur, then start
Air knife knife is away from feedback control unit, it is assumed that process section strip speed and air pressure it is constant be constant, now only take into account promoting the circulation of qi
Knife horizontal range feedback compensation, calculation formula of the air knife knife away from feedback control compensation amount is as follows：
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1
In formula (3),To thickness of coating model formation：W=KVaDbPcThickness of coating is sought to air knife
Knife is obtained away from partial derivativeWherein K is model constants, and normal value is K=1, a, and b, c is that strip plates thick model certainly
Accommodation coefficient, W is thickness of coating, and V is strip speed, and P is air pressure, GDFor feedback control gain, WT、WB
For the upper and lower overlay coating thickness measured value of strip；
4) air knife knife away from boundary value setting：Knife is saved in process control computer number away from presetting a minimum value
According in storehouse, when knife is less than minimum value away from detected value, by Process Control System send instruction issue minimum value give air knife knife away from
Actuator, it is to avoid break air knife nozzle.
2. a kind of continuous hot galvanizing air knife knife according to claim 1 is away from autocontrol method, it is characterised in that institute
The strip process supplemental characteristic stated includes target thickness, coating species, strip width, belt steel thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610115522.5A CN107130199B (en) | 2016-02-29 | 2016-02-29 | A kind of continuous hot galvanizing air knife knife is away from autocontrol method |
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|---|---|---|---|
| CN201610115522.5A CN107130199B (en) | 2016-02-29 | 2016-02-29 | A kind of continuous hot galvanizing air knife knife is away from autocontrol method |
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| CN107130199B CN107130199B (en) | 2019-01-08 |
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ID=59721623
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118432A (en) * | 2020-01-14 | 2020-05-08 | 邯郸钢铁集团有限责任公司 | Method for automatically controlling weight of zinc layer of galvanized product |
| CN112840061A (en) * | 2018-09-21 | 2021-05-25 | Posco公司 | Plating amount control device and control method |
| CN113774307A (en) * | 2021-09-10 | 2021-12-10 | 唐山市佳冠实业有限公司 | Self-control air knife elevator structure of equipment for producing hot-dip galvanized sheet and use method |
| CN115287571A (en) * | 2022-09-29 | 2022-11-04 | 如皋昌哲科技有限公司 | Hot galvanizing post-treatment equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695830A (en) * | 2013-12-20 | 2014-04-02 | 鞍钢股份有限公司 | Coating thickness control method in hot galvanizing production process |
| CN104846306A (en) * | 2015-05-07 | 2015-08-19 | 浙江中控研究院有限公司 | Zincing thickness control system and method |
| TW201546327A (en) * | 2014-06-04 | 2015-12-16 | China Steel Corp | Coating layer weight control method |
| US9217194B2 (en) * | 2012-02-21 | 2015-12-22 | Cockerill Maintenance & Ingénierie S.A. | System for reducing the wiping gas consumption in an air knife |
-
2016
- 2016-02-29 CN CN201610115522.5A patent/CN107130199B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9217194B2 (en) * | 2012-02-21 | 2015-12-22 | Cockerill Maintenance & Ingénierie S.A. | System for reducing the wiping gas consumption in an air knife |
| CN103695830A (en) * | 2013-12-20 | 2014-04-02 | 鞍钢股份有限公司 | Coating thickness control method in hot galvanizing production process |
| TW201546327A (en) * | 2014-06-04 | 2015-12-16 | China Steel Corp | Coating layer weight control method |
| CN104846306A (en) * | 2015-05-07 | 2015-08-19 | 浙江中控研究院有限公司 | Zincing thickness control system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112840061A (en) * | 2018-09-21 | 2021-05-25 | Posco公司 | Plating amount control device and control method |
| CN111118432A (en) * | 2020-01-14 | 2020-05-08 | 邯郸钢铁集团有限责任公司 | Method for automatically controlling weight of zinc layer of galvanized product |
| CN113774307A (en) * | 2021-09-10 | 2021-12-10 | 唐山市佳冠实业有限公司 | Self-control air knife elevator structure of equipment for producing hot-dip galvanized sheet and use method |
| CN115287571A (en) * | 2022-09-29 | 2022-11-04 | 如皋昌哲科技有限公司 | Hot galvanizing post-treatment equipment |
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|---|---|
| CN107130199B (en) | 2019-01-08 |
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