CN107794481A - A kind of stair like control strategy method of galvanized wire air knife position - Google Patents
A kind of stair like control strategy method of galvanized wire air knife position Download PDFInfo
- Publication number
- CN107794481A CN107794481A CN201710987224.XA CN201710987224A CN107794481A CN 107794481 A CN107794481 A CN 107794481A CN 201710987224 A CN201710987224 A CN 201710987224A CN 107794481 A CN107794481 A CN 107794481A
- Authority
- CN
- China
- Prior art keywords
- speed
- air knife
- distance
- during
- running length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The present invention proposes a kind of stair like control strategy method of galvanized wire air knife position, the first step：The speed of air knife is driven to be accelerated at a high speed from 0 after starting through motor, elapsed time ta, during which running length is startup distance a；Second step：Travel at the uniform speed time tb ta under high speed, and during which running length is distance b at a high speed；3rd step：Run time tc tb under primary speed-down, low speed is reached, during which running length is primary speed-down distance c；4th step：Run time td tc under low-speed conditions, during which running length is low speed distance d；5th step：Run time te td under double reduction, during which running length is double reduction distance e；A+b+c+d+e is the length of air knife action, and when high speed, low speed are definite value, a+c+d+e is also set to definite value, then only needs accurate control b size to can be achieved with the accurate control of air knife position.Advantage：Precision brings up to 0.1mm from 0.3mm.Zinc layer weight controls more accurate, reduces zinc ingot metal consuming cost, does not change existing equipment configuration, effectively reduces production cost.
Description
Technical field
Field is used the invention belongs to galvanization production line equipment, is related to a kind of stair like control strategy method of air knife position.
Background technology
Jiuquan Iron ＆ Steel Co. has introduced two continuous zinc coating lines during 11th Five-Year, and kind mainly has GI, GL, GF.The machine
Group is technology-intensive, continuity is strong, and product quality requires high, to galvanized sheet zinc layers and Bian Houyou extremely strict requirements.Zinc ingot metal is made
For the main consuming cost of zinc-plated production, only it is improved the precision of equipment, zinc ingot metal consumption could be reduced.Main technique：Pass through zinc
Pot heating fusing zinc ingot metal, strip bypass sinking roller galvanizing by dipping in zinc pot, pass through air knife after going out zinc pot, utilize knife after annealing
The high pressure draught that lip sprays uniformly strikes off zinc liquid, forms bright and clean surface.For knife lip closer to strip, air-flow strikes off the effect of zinc liquid
Fruit is better, determines that the precision of air knife equipment directly affects product quality and production cost.
Galvanizing production manufactures according to according to the order requirements of client, and most important index is the requirement of zinc layer weight, such as
There is 60g/m2（It is two-sided）、80g/m2（It is two-sided）、120g/m2（It is two-sided）、275g/m2（It is two-sided）Deng.Zinc layer weight relation product
Service life, usual coating more it is heavy it is corrosion-resistant it is stronger, service life is longer, coating cannot be below order requirements.Therefore, coating is got over
It is bigger close to order requirements profit, and if coating is less than order requirements product can be caused to degrade and sell, cause in production
Difficulty.In order to ensure that cashing for order uses safer control method, zinc layer weight compares order requirements in actual production
More 5-8g/m2（It is two-sided）, the risk that avoids coating from not being inconsistent certainly will cause the rising of production cost.Only further improve air knife
Control accuracy, can just make knife lip closest to belt steel surface, zinc layer weight is controlled in the requirement close to order.
The content of the invention
The present invention proposes a kind of stair like control strategy of galvanized wire air knife position to further improve the control accuracy of air knife
Method.
The technical scheme is that：A kind of stair like control strategy method of galvanized wire air knife position, the galvanized wire pass through zinc
Pot heating fusing zinc ingot metal, strip bypass sinking roller galvanizing by dipping in zinc pot, pass through air knife after going out zinc pot, utilize knife after annealing
The high pressure draught that lip sprays uniformly strikes off zinc liquid, forms bright and clean surface, the action process of the stair like control strategy method is divided into
5 step below：
The first step：Speed through motor driving air knife after starting accelerates at a high speed from 0, elapsed time ta, and during which running length is
Start distance a；
Second step：Travel at the uniform speed time tb-ta under high speed, and during which running length is distance b at a high speed；
3rd step：Run time tc-tb under primary speed-down, low speed is reached, during which running length is primary speed-down distance c；
4th step：Run time td-tc under low-speed conditions, during which running length is low speed distance d；
5th step：Run time te-td under double reduction, during which running length is double reduction distance e；
A+b+c+d+e is the length of air knife action, and when high speed, low speed are definite value, a+c+d+e is also set to definite value, then only needs
B size is accurately controlled to can be achieved with the accurate control of air knife position.
The beneficial effects of the invention are as follows：Stepped control method is employed for air knife opening, closing motion, will can be set
Standby precision brings up to 0.1mm from 0.3mm.
After the control accuracy of air knife equipment improves, the knife lip of air knife can improve service efficiency, do not have to closer to belt steel surface
Worry that device action excessively causes to damage.The air-flow sprayed in knife lip can control zinc layer weight more accurate, reduce zinc ingot metal and disappear
Cost is consumed, brighter and cleaner surface at the same time can also be obtained, improve the quality of product.Control method provided by the invention can be significantly
The precision of equipment is improved, does not change existing equipment configuration, it is easy to implement, it is not necessary to increase expense investment, effectively reduce being produced into
This.
Brief description of the drawings
Fig. 1 is the structural representation of galvanized wire air knife equipment；
In figure：1- encoders I；2- motors I；3- reduction boxes I；4- zinc pots；5- knife lips I；6- zinc liquid；7- knife lips II；8- reduction boxes
II；9- motors II；10- encoders II；11- crossbeams；12- knife interlabial gaps；13- strips；
Fig. 2 is the stair like control strategy schematic diagram of air knife position；
In figure：21- accelerates；22- is at a high speed；23- primary speed-downs；24- low speed；25- double reductions；101- starts distance；102- is high
Fast distance；103- primary speed-down distances；104- low speed distances；105- double reduction distances；
Fig. 3 is the control accuracy schematic diagram of air knife position；
In figure：106- High-speed Control precision；107- low speed control accuracies.
Embodiment
As shown in figure 1, essentially describe the main composition of air knife equipment.Air knife is the capital equipment of galvanized wire, and this figure is
Side view.Air knife is arranged on base rack, is divided into former air knife, rear air knife two parts, knife lip is the position of air knife front end jet.
Strip passes through among preceding rear air knife.Motor I2, motor II9 are respectively used to drive the action of former air knife and rear air knife.Motor is pacified
On crossbeam 11, it is connected between plant equipment by reduction box I3, reduction box II8.Encoder I1, encoder II10 distinguish
Detection front side knife lip I5, rear side knife lip II7 position.The completion in zinc pot 4 of strip 13 is zinc-plated, and zinc liquid 6 is attached into its surface,
Run up through air knife.Certain distance is kept between strip and knife lip.
Motor I, motor II model SUMITOMO CHEMICAL CNHM1-6100-AV-B-29, the drive device to match is using rich
The RKPB100R-4FM5C type frequency converters of scholar.The type selection of air knife apparatus body, determine in the case of power frequency 50Hz, electricity
The maximum speed of machine driving air knife movement is 6.2mm/s.
Encoder I, the encoder II model ATM60-P4H13X13 (SICK) installed in mechanism, monitors gas in real time
The position of knife.
As shown in Fig. 2 rectangular coordinate system, transverse axis chronomere：S, longitudinal velocity change unit：mm/s.A kind of galvanized wire
The implementation process of the stair like control strategy method of air knife position：
The first step：Since coordinate O points, accelerate（21）Reached at a high speed by ta seconds to A points（22）, during which running length is to open
Dynamic distance a（101）；
Second step：From A points using at a high speed（22）Operation（tb-ta）Second reaches B points, and during which running length is distance b at a high speed
（102）；
3rd step：Pass through primary speed-down from B points（23）Operation（tc-tb）Second C points are arrived, reach low speed（24）, during which run length
Spend for primary speed-down distance c（103）；
4th step：Low speed is used from C points（24）Operation（td-tc）Second D points are arrived, during which running length is low speed distance d
（104）；
5th step：Pass through double reduction from D points（25）Operation（te-td）Second to E points stop, during which running length subtracts for two level
Fast distance e（105）.
Action process is analyzed：It can find out from Fig. 2, be air knife by the curve O-A-B-C-D-E-O areas surrounded
The length of action, is divided into（101）、（102）、（103）、104）、（105）Five parts form.
When at a high speed（22）, low speed（24）For a timing, range ability（101）+（103）+（104）+（105）Sum is then fixed
Value, it is only necessary to accurate control（102）Size can be achieved with the accurate control of air knife position.
The realization of action process
Operation curve controls realization in Siemens's PCS7 systems in Fig. 2.Entitled OB36 tissue is called in the controls
Functional block, the cycle of operation are 50ms, and the program circulation in the functional block performs.Operative employee can pass through WINCC man-machine interface
The desired value of air knife position is inputted, program requires the opening of control air knife according to instruction, closed.According to encoder、Feedback
Value is compared, and judges whether to reach target.
Parameter setting is carried out in the RKPB100R-4FM5C type frequency converters of Fuji.P5 parameters are arranged to 2s first, from
The time required to zero accelerates to 100% speed.P6 parameters are arranged to 0.5s again, the time required to dropping to zero from 100% speed.Setting from
O → A used times 2s, B → C used time 0.4s, C → D used time 1s, D → E used time 0.1s.It can obtain
At a high speed（22）=6.2mm/s
Low speed（24）=1/5×6.2mm/s=1.24mm/s
Now two parameters of P5, P6 are it has been determined that described in so Fig. 2（101）+（103）+（104）+（105）Sum is exactly
Definite value.
So,（101）+（103）+（104）+（105）=8.98mm
Assuming that current location is S1, the desired value of next step is S2, at a high speed distance（102）Represent as follows
So A → B time
Only need the run time t of control high regime, you can realize the target location of air knife.
As shown in figure 3, describe that High-speed Control, the deviation of low speed control is respectively adopted.In the programmable controller, move
Work was performed according to the cycle.The OB36 execution cycle is 50ms in Siemens Control software, and this time effects equipment
The precision of action.
At a high speed（22）During operation, travel distance is deviation in a cycle（106）, then
（106）=6.2mm/s×50ms=0.31mm
Low speed（24）During operation, travel distance is deviation in a cycle（107）, then
（107）=1.24mm/s×50ms=0.06mm
The operation logic of programmable controller is periodically to perform, it will causes to produce deviation between actual value and desired value, greatly
The small range ability for a cycle.Compare, responded soon using High-speed Control equipment, but the error of equipment reaches 0.3mm；
If using stair like control strategy mode, first high-speed cruising drops to low speed operation in short-term, braking again, and the error of equipment is ＜
0.1mm, it can realize that quick response also ensures equipment precision.
Air knife is driven using variable-frequency motor, detects physical location equipped with encoder, air knife is opened according to the requirement of operative employee
Or close, conversion and the distance of belt steel surface.Automatic in former design, regulation air knife position manually control accuracy can reach
0.3mm, precision can be brought up to by 0.1mm using the control method of this patent so that knife lip can be closer to strip.Knife lip is closer
Strip is advantageous to strike off zinc liquid, and Improving The Quality of Products, the zinc layer weight of same specification product is than original reduction 2-3g/m2 at present（It is double
Face）, COMPREHENSIVE CALCULATING reduction 2.4%-3.6% zinc ingot metal cost consumptions.
Claims (1)
1. a kind of stair like control strategy method of galvanized wire air knife position, the galvanized wire heats fusing zinc ingot metal by zinc pot, and strip exists
Sinking roller galvanizing by dipping in zinc pot is bypassed after annealing, air knife is passed through after going out zinc pot, the high pressure draught sprayed using knife lip is by zinc
Liquid uniformly strikes off, and forms bright and clean surface, it is characterised in that：The action process of stair like control strategy method is divided into following 5 step：
The first step：Speed through motor driving air knife after starting accelerates at a high speed from 0, elapsed time ta, and during which running length is
Start distance a；
Second step：Travel at the uniform speed time tb-ta under high speed, and during which running length is distance b at a high speed；
3rd step：Run time tc-tb under primary speed-down, low speed is reached, during which running length is primary speed-down distance c；
4th step：Run time td-tc under low-speed conditions, during which running length is low speed distance d；
5th step：Run time te-td under double reduction, during which running length is double reduction distance e；
A+b+c+d+e is the length of air knife action, and when high speed, low speed are definite value, a+c+d+e is also set to definite value, then only needs
B size is accurately controlled to can be achieved with the accurate control of air knife position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987224.XA CN107794481A (en) | 2017-10-20 | 2017-10-20 | A kind of stair like control strategy method of galvanized wire air knife position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987224.XA CN107794481A (en) | 2017-10-20 | 2017-10-20 | A kind of stair like control strategy method of galvanized wire air knife position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107794481A true CN107794481A (en) | 2018-03-13 |
Family
ID=61532689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710987224.XA Pending CN107794481A (en) | 2017-10-20 | 2017-10-20 | A kind of stair like control strategy method of galvanized wire air knife position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107794481A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111977571A (en) * | 2019-05-21 | 2020-11-24 | 北京京东尚科信息技术有限公司 | Speed control method and device for lifting mechanism |
| CN112853249A (en) * | 2021-01-06 | 2021-05-28 | 方义毫 | Steel band galvanizing coat thickness control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040050323A1 (en) * | 2001-08-24 | 2004-03-18 | Hong-Kook Chae | Apparatus for controlling coating weight on strip in continuous galvanizing process |
| CN102212768A (en) * | 2011-05-31 | 2011-10-12 | 攀钢集团有限公司 | Method for accurately adjusting air knife for controlling galvanized layer thickness |
| CN104109829A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method for controlling work width of air knife of hot galvanizing set |
| CN106167887A (en) * | 2016-07-04 | 2016-11-30 | 浙江中控研究院有限公司 | Based on the cutter hot dip galvanizing coating thickness fast switch over method away from dynamic compensation and system |
| CN106435427A (en) * | 2016-08-08 | 2017-02-22 | 浙江中控研究院有限公司 | Air knife distance optimization control method applied to galvanization production |
-
2017
- 2017-10-20 CN CN201710987224.XA patent/CN107794481A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040050323A1 (en) * | 2001-08-24 | 2004-03-18 | Hong-Kook Chae | Apparatus for controlling coating weight on strip in continuous galvanizing process |
| CN102212768A (en) * | 2011-05-31 | 2011-10-12 | 攀钢集团有限公司 | Method for accurately adjusting air knife for controlling galvanized layer thickness |
| CN104109829A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method for controlling work width of air knife of hot galvanizing set |
| CN106167887A (en) * | 2016-07-04 | 2016-11-30 | 浙江中控研究院有限公司 | Based on the cutter hot dip galvanizing coating thickness fast switch over method away from dynamic compensation and system |
| CN106435427A (en) * | 2016-08-08 | 2017-02-22 | 浙江中控研究院有限公司 | Air knife distance optimization control method applied to galvanization production |
Non-Patent Citations (1)
| Title |
|---|
| 陈代兵: "镀锌线气刀自动位置控制的实现", 《酒钢科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111977571A (en) * | 2019-05-21 | 2020-11-24 | 北京京东尚科信息技术有限公司 | Speed control method and device for lifting mechanism |
| CN112853249A (en) * | 2021-01-06 | 2021-05-28 | 方义毫 | Steel band galvanizing coat thickness control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105215057B (en) | Control method of medium-thickness plate rolling and conveying speed | |
| CN201648501U (en) | High-speed continuous induction annealing device for copper pipes | |
| CN107794481A (en) | A kind of stair like control strategy method of galvanized wire air knife position | |
| CN102912275A (en) | Automatic control system for plating thickness of hot galvanizing line | |
| CN102990360B (en) | The production line of multi color effect roller coat color steel | |
| CN201436305U (en) | Scraper For Working Rollers Inside Zinc Boiler | |
| CN109248919A (en) | A kind of Continuous Cold Rolled Strip dynamic shearing control method | |
| CN108672504B (en) | A kind of cold-strip steel induction heating coil of strip transition temperature control method | |
| CN117025896B (en) | Heat treatment system | |
| CN106269907B (en) | A kind of conveyor roller power-economizing method and its system based on rolled piece positioning | |
| CN107130199B (en) | A kind of continuous hot galvanizing air knife knife is away from autocontrol method | |
| CN202137143U (en) | Band steel surface cleaning mechanism stepless speed control device | |
| CN105312358A (en) | Tension control method for cold-rolled strip steel in acid continuous rolling working procedure | |
| CN104109829B (en) | Continuous galvanizing line air knife working width control method | |
| CN208673132U (en) | A kind of roller surface laser roughing digital control system | |
| CN101920264B (en) | Cooling method for replacing hot roll | |
| CN108188183B (en) | A method of for the setting of cold rolling processing line strip speed and strip location control | |
| CN110825055B (en) | Hybrid production workshop energy-saving scheduling method considering continuous processing of heating furnace | |
| CN201288137Y (en) | Continuous sphere-addition control device for glass fibre crucible pot fiber drawing | |
| Luo | Design of Automatic Control System for Pickling Line Based on Siemens PLC | |
| CN113073317A (en) | Galvanized steel strip surface passive film weight control system and control method thereof | |
| CN107538883A (en) | A kind of hot equipment for coating film of sheet metal and its processing method | |
| JP2018158374A (en) | Flying plate thickness changing method and flying plate thickness changing apparatus | |
| CN113579189A (en) | Control device and control method for vertical continuous casting flame cutter for stainless steel plate blank | |
| CN108705858B (en) | Four-color metal printing continuous production line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180313 |
|
| RJ01 | Rejection of invention patent application after publication |