CN105695726B - The roller table speed closed loop control method of on-line continuous induction furnace - Google Patents
The roller table speed closed loop control method of on-line continuous induction furnace Download PDFInfo
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- CN105695726B CN105695726B CN201410694408.3A CN201410694408A CN105695726B CN 105695726 B CN105695726 B CN 105695726B CN 201410694408 A CN201410694408 A CN 201410694408A CN 105695726 B CN105695726 B CN 105695726B
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Abstract
The present invention relates to the roller-way technology that a kind of steel plate moves continuous sensing heating online.A kind of roller table speed closed loop control method of on-line continuous induction furnace, steel plate is in the roller-way of stokehold first（1）When at full speed V1 enter, in the roller-way of stokehold second（2）When the steel plate furnace rolls road that is moved and entered in induction heater with low velocity V2（3）, when steel plate leaves induction heater completely（7）Roller-way after into stove（4）At full speed V3 is moved Shi Ze；The first metal sensor is installed above the roller-way of stokehold first and the second roller-way intersection（5）, the second metal sensor is installed above roller-way intersection behind furnace rolls road and stove（6）.The strip quickly moved after rolling is slowed down and with low speed passes through online sensing heating stove heat by the present invention, it is ensured that the enough sensing heating time is to reach the temperature of technological requirement；And the strip rolled afterwards without quick demand for heat then passes through sensing heating furnace chamber with high speed.
Description
Technical field
The present invention relates to the roller-way technology that a kind of steel plate moves continuous sensing heating online, more particularly to a kind of on-line continuous
The roller table speed closed loop control method of induction furnace, it is adaptable to the thermomechanical control technology of medium plate.
Background technology
With the development of science and technology the scope of materials application is constantly expanded, requirement of the people to material property is further harsh, heat
Mechanical course technique（TMCP）There is material impact to the performance of material, the production of property steel plate, such as weldability can be achieved
Can excellent high-strength steel, Steels for High Rise Buildings and large ship steel etc., can significant increase slab quality level, to slab
Performance impact is especially pronounced.One important feature of TMCP technologies of new generation is that the burning optimization on line process after rolling is not limited only to
Cooling is incubated, and the heating of certain condition can be also carried out in some cases.The burning optimization on line device of cut deal is using efficiently
Induction heating apparatus carries out prompt tempering, and distribution and size that can be to carbide be controlled, and make its highly uniform, tiny
It is scattered on matrix, so as to realize the high intensity and high tenacity of quenched and tempered steel.
Quick heating tempering technology after rolling and rolling is the material control of the intensity, toughness and weldability that improve steel
Technology.Because on-line continuous induction heating tempering stove furnace chamber is long, steel plate to be heated is thick, therefore steel plate to be heated must be in sense
Low speed is answered in tempering furnace by ensure to reach tempering process temperature.Current hot rolling pilot scale platform rolls rear whole section of control of roller roller speed
System, and install additional after on-line continuous induction tempering stove due to reasons such as the response characteristics of furnace chamber size and induction heater, it is necessary to will
Roll rear whole section of roll and be divided into stokehold, three sections of rolls in stove, after stove, the speed control of three sections of roller-ways is both needed to reach technological requirement.It is logical
Literature query and patent retrieval are crossed, on-line continuous induction heater stokehold, the fast closed-loop control of roller roller in stove, after stove are there is no at present
Technology.Chinese patent CN201010159155.1 discloses a kind of slighter compress roller speed control method, and the patent is drawn for each pair
Rectify roller and carry out roller speed control, and the online roller-way quantity of milling train is more, distance, it is inapplicable using the speed control of single roller.
The content of the invention
It is an object of the invention to provide a kind of roller table speed closed loop control method of on-line continuous induction furnace, this method will
The strip quickly moved after rolling is slowed down with low speed by online sensing heating stove heat, to ensure during enough sensing heatings
Between to reach the temperature of technological requirement；And the strip rolled afterwards without quick demand for heat then passes through induction heater with high speed
Chamber.
In order to realize above-mentioned technical purpose, the present invention is adopted the following technical scheme that：
A kind of roller table speed closed loop control method of on-line continuous induction furnace, steel plate is moved on a production line by roller-way,
The roller-way of production line is divided into three parts：Roller-way after charging roller table, furnace rolls road and stove, the charging roller table includes stokehold first
Roller-way and the roller-way of stokehold second；The first metal sensor, stove are installed above the roller-way of stokehold first and the second roller-way intersection
The second metal sensor is installed above roller-way intersection after interior roller-way and stove；
The roller table speed of stokehold first by stokehold the first roller-way servo electrical machinery system control, the roller table speed of stokehold second by
Stokehold the second roller-way servo electrical machinery system control, furnace rolls road speed is controlled by furnace rolls road servo electrical machinery system, roller-way after stove
Speed roller-way servo electrical machinery system after stove is controlled；The servo electrical machinery system includes servomotor, controller, reductor, connection
Axle device, motor and speed reducer base；First metal sensor and the second metal sensor output connects intelligent processing unit, watches
Take electric system motor output electric signal and connect intelligent processing unit, intelligent processing unit output connects servo electrical machinery system controller；
Length of the roller-way of stokehold second along roller-way conveying direction is L1, length of the furnace rolls road along roller-way conveying direction
For L2, length of the roller-way along roller-way conveying direction is L after stove3；
First, steel plate enters charging roller table part, then enters back into the furnace rolls road of induction heater part, sensing heating
System is begun to warm up, roller-way after steel plate leaves induction heater into stove completely, then whole steel plates reached target temperature and
Temperature homogeneity；
The roller table speed closed loop control method is：When on production line without steel plate, the first metal sensor signal S1=0, stove
Preceding first roller-way keeps high speed V1, roller-way keeps the low velocity of heating technological requirement after the roller-way of stokehold second, furnace rolls road, stove
V2；
Once steel plate enters the roller-way of stokehold second, the first metal sensor signal S through the roller-way of stokehold first1Become 1 by 0,
The roller table speed of stokehold first is immediately from V1Switch to V2；When steel plate has left the roller-way of stokehold first, the first metal sensor completely
Device signal S1When becoming 0 by 1, the roller table speed of stokehold first switches to 0；Delay t=（L1+L2）/V2+L3/V3Afterwards, the roller-way of stokehold first
Speed switches to V1, now steel plate leave roller-way after stove completely；
The roller table speed of stokehold second and the furnace rolls road speed is always maintained at V2；
When steel plate leaves induction heater, the second metal sensor signal S2It is changed into roller table speed after 1, the stove from 0
Keep V2Once, without steel plate in induction heater, then the second metal sensor signal S2It is changed into roller table speed after 0, stove from 1 fast
Speed switches to high speed V3, steel plate quickly leaves roller-way and enters roller-way high speed V after air cooling zone, stove3Hold time as t=L3/V3
After switch to low velocity V2；
The steel plate in the first roller-way of stokehold at full speed V1 enter, in stokehold during the second roller-way steel plate with low velocity V2
Move and enter to induction heater, then at full speed V3 is moved when steel plate leaves induction heater into roller-way after stove completely
It is dynamic.
If steel plate need not be heated, roller table speed is equal after the roller-way of stokehold first, the roller-way of stokehold second, furnace rolls road and stove
It is set as high speed V1, induction heater is quickly opened, allows steel plate to enter steel plate stockpiling area quickly through roller-way.
The roller table speed closed loop control method of on-line continuous induction furnace of the present invention is to set up continuous moving on roller-way after rolling
The velocity close-loop control method of roller-way after induction heater charging roller table, furnace rolls road, stove, to ensure strip induction heating tempering
When roller speed it is accurate controlled.The control method of the present invention is according to the process requirements for rolling rear steel plate rapid thermal treatment, part continuous moving
Strip roll after need to carry out tempering heat treatment online, therefore must by the strip quickly moved after rolling slow down be passed through with low speed it is online
Sensing heating stove heat, it is ensured that the enough sensing heating time is to reach the temperature of technological requirement.And without quick after rolling
The strip of demand for heat then passes through sensing heating furnace chamber with high speed.
The roller table speed closed loop control method of on-line continuous induction furnace of the present invention is realized rolls rear prompt tempering need for having
The strip asked can enter with the arbitrary speed in the range of the controlled speed of process requirements, by, leave induction heater, and speed
Degree is in controllable state, and accurate speed control is provided for the strip transport of online induction heater.
Brief description of the drawings
Fig. 1 is the roller-way structural representation of the on-line continuous induction furnace of the present invention；
Fig. 2 is Fig. 1 schematic top plan view；
Fig. 3 is embodiments of the invention schematic diagram；
Fig. 4 is the roller table speed closed loop control method flow chart of on-line continuous induction furnace of the present invention；
Fig. 5 is the speed switching schematic diagram of strip and roller-way in whole section of online sensing heating；
Fig. 6 is that the roller table speed of stokehold first switches schematic diagram；
Fig. 7 is roller table speed switching schematic diagram after stove.
In figure：Roller-way after 1 the first roller-way of stokehold, 2 the second roller-ways of stokehold, 3 furnace rolls roads, 4 stoves, 5 first metal sensors,
6 second metal sensors, 7 induction heaters；8 stokehold the first roller-way servo electrical machinery systems, 9 stokehold the second roller-way servomotor systems
Roller-way servo electrical machinery system, 12 steel plates after system, 10 furnace rolls road servo electrical machinery systems, 11 stoves.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
A kind of roller table speed closed loop control method of on-line continuous induction furnace be related to stokehold, in stove, after stove conveying roller roller
Speed switching and accurate control.The structural representation of whole roller-way is as depicted in figs. 1 and 2.
Steel plate 12 is moved on a production line by roller-way, and the roller-way of production line is divided into three parts：Charging roller table, furnace rolls
Roller-way 4 behind road 3 and stove, the charging roller table includes the first roller-way of stokehold 1 and the second roller-way of stokehold 2, and the first roller-way of stokehold 1 is to roll
High-speed mobile roller-way afterwards, the second roller-way of stokehold 2 is that speed switches roller-way.On stokehold the first roller-way 1 and the intersection of the second roller-way 2
Side is provided with behind the first metal sensor 5, furnace rolls road 3 and stove and is provided with the second metal sensor 6 above the intersection of roller-way 4.
The speed of the first roller-way of stokehold 1 is controlled by stokehold the first roller-way servo electrical machinery system 8, the speed of the second roller-way of stokehold 2
Degree is controlled by stokehold the second roller-way servo electrical machinery system 9, and the speed of furnace rolls road 3 is controlled by furnace rolls road servo electrical machinery system 10,
The speed of roller-way 4 roller-way servo electrical machinery system 11 after stove is controlled after stove；The servo electrical machinery system 8,9,10,11 includes servo electricity
Machine, controller, reductor, shaft coupling, motor and speed reducer base；The metal sensor 6 of first metal sensor 5 and second
Output connects intelligent processing unit（Not shown in Fig. 3）, the motor of servo electrical machinery system 8,9,10,11 output electric signal connect Intelligent treatment
Unit, intelligent processing unit output connects the controller of servo electrical machinery system 8,9,10,11, referring to Fig. 3.Wherein furnace rolls road 3 due to
Inside induction heater 7, furnace rolls road 3 is using without magnetic conductivity roller-way, and the part that matches with furnace rolls road 3 uses special material
Matching component.Roller roller speed realizes being precisely controlled for speed by servo electrical machinery system after charging roller table, furnace rolls road, stove.
Because line upper plate strip length thickness is unknown, set for the difference that prevents front and rear panel band from mutually hitting different strip induction heating technology parameters
Put, therefore whole section of roller-way only allows one piece of strip to enter every time after the roller-way of stokehold first to stove.
Length of second roller-way of stokehold 2 along roller-way conveying direction is L1, length of the furnace rolls road 3 along roller-way conveying direction
Spend for L2, length of the roller-way 4 along roller-way conveying direction is L after stove3；
First, steel plate 12 enters charging roller table part, then enters back into the furnace rolls road 3 of the part of induction heater 7, senses
Heating system is begun to warm up, and when steel plate 12 leaves roller-way 4 after induction heater 7 enters stove completely, then whole steel plates have reached mesh
Mark temperature and temperature homogeneity.
Referring to Fig. 4 to Fig. 7, a kind of roller table speed closed loop control method of on-line continuous induction furnace of the invention is：Production
When on line without steel plate, the first metal sensor signal S1=0, the roller-way of stokehold first keeps high speed V1, in the roller-way of stokehold second, stove
Roller-way keeps the low velocity V of heating technological requirement after roller-way, stove2。
Once steel plate enters the roller-way of stokehold second, the first metal sensor signal S through the roller-way of stokehold first1Become 1 by 0,
The roller table speed of stokehold first is immediately from V1Switch to V2；When steel plate has left the roller-way of stokehold first, the first metal sensor completely
Device signal S1When becoming 0 by 1, the roller table speed of stokehold first switches to 0；Delay t=（L1+L2）/V2+L3/V3Afterwards, the roller-way of stokehold first
Speed switches to V1, now steel plate leave roller-way after stove completely；Referring to Fig. 5 and Fig. 6.
The roller table speed of stokehold second and the furnace rolls road speed is always maintained at V2。
When steel plate leaves induction heater, the second metal sensor signal S2It is changed into roller table speed after 1, the stove from 0
Keep V2Once, without steel plate in induction heater, then the second metal sensor signal S2It is changed into roller table speed after 0, stove from 1 fast
Speed switches to high speed V3, steel plate quickly leaves roller-way and enters roller-way high speed V after air cooling zone, stove3Hold time as t=L3/V3
After switch to low velocity V2；Referring to Fig. 5 and Fig. 7.
The steel plate in the first roller-way of stokehold at full speed V1 enter, in stokehold during the second roller-way steel plate with low velocity V2
Move and enter to induction heater, then at full speed V3 is moved when steel plate leaves induction heater into roller-way after stove completely
It is dynamic, referring to Fig. 5.
If steel plate need not be heated, the speed of roller-way 4 after the first roller-way of stokehold 1, the second roller-way of stokehold 2, furnace rolls road 3 and stove
Degree is set as high speed V1, and induction heater is quickly opened, and allows steel plate to enter steel plate stockpiling area quickly through roller-way.
Embodiment
As shown in figure 3, the roller table speed closed-loop control system of the present embodiment on-line continuous induction furnace, including：Stokehold first
Roller-way 1（Length 5m）, the second roller-way of stokehold 2（Length 2m）, the furnace rolls road 3 of induction heater（Length 3m）, roller-way 4 after stove
（Length 5m）, the first metal sensor 5, the second metal sensor 6, stokehold the first roller-way servo electrical machinery system 8, the roller of stokehold second
Roller-way servomotor after roller-way support in road servo electrical machinery system 9, induction heater, furnace rolls road servo electrical machinery system 10, stove
System 11.The sensor signal output of the metal sensor 6 of first metal sensor 5 and second connects intelligent processing unit（Fig. 3
Not shown in）, the motor of servo electrical machinery system 8,9,10,11 output electric signal connects intelligent processing unit, intelligent processing unit output
Connect the controller of servo electrical machinery system 8,9,10,11, the closed-loop control flowchart control of roller-way rotating speed as shown in Figure 4.
A kind of roller table speed closed loop control method of on-line continuous induction furnace of the present embodiment is：
Without tempering heat treatment after strip is in rolling, during with 1.3m/s high speeds by moving induction heater online,
System according to the speed for rolling rear roller-way set stokehold, in stove, after stove three sections of roller-way servo electrical machinery systems rotating speed, to ensure strip
Pass through induction heater at a high speed；
When strip needs tempering heat treatment after rolling, strip rolls rear translational speed for 1.3m/s, it is necessary to 0.1m/s low speed
Degree enters induction heater to ensure the process requirements quickly heated, and leaving roller-way after line tempering with 2m/s speed enters air cooling
Area.Strip on the first roller-way of stokehold 1 with 1.3m/s speed move, when the first metal sensor 5 detected strip by when
Rising edge signal is fed back, the roller speed of the first roller-way of stokehold 1 is switched to 0.1m/s by system immediately, strip passes through stokehold the with 0.1m/s
Two roller-ways 2 and furnace rolls road 3.After strip leaves the first roller-way of stokehold 1 completely, the first metal sensor 5 feedback trailing edge letter
Number, the roller speed of the first roller-way of stokehold 1 is switched to 0 by system, and system switches to the roller speed of the first roller-way of stokehold 1 after being delayed 52.5 seconds
1.3m/s, it is ensured that only have current strip on line and carry out online temper.When strip leaves induction heater completely, the second gold medal
Belong to the feedback trailing edge signal of sensor 6, the roller speed of roller-way after stove 4 is switched to 2m/s by system, and strip is able to 2m/s speed and passes through stove
Roller-way enters air cooling zone afterwards, and the roller speed of roller-way after stove 4 is switched to 0.1m/s by system after being delayed 2.5 seconds.
These are only presently preferred embodiments of the present invention, be not intended to limit the scope of the present invention, therefore, it is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., should be included in the protection model of the present invention
Within enclosing.
Claims (2)
1. a kind of roller table speed closed loop control method of on-line continuous induction furnace, it is characterized in that：
Steel plate is moved on a production line by roller-way, and the roller-way of production line is divided into three parts：Charging roller table, furnace rolls road（3）
With roller-way after stove（4）, the charging roller table include the roller-way of stokehold first（1）With the roller-way of stokehold second（2）；In the roller-way of stokehold first
（1）With the second roller-way（2）The first metal sensor is installed above intersection（5）, furnace rolls road（3）With roller-way after stove（4）Hand over
Top is provided with the second metal sensor at boundary（6）；
The roller-way of stokehold first（1）Speed is by stokehold the first roller-way servo electrical machinery system（8）Control, the roller-way of stokehold second（2）
Speed is by stokehold the second roller-way servo electrical machinery system（9）Control, furnace rolls road（3）Speed is by furnace rolls road servo electrical machinery system
（10）Roller-way after control, stove（4）Speed roller-way servo electrical machinery system after stove（11）Control；The first roller-way of stokehold servo electricity
Machine system（8）, stokehold the second roller-way servo electrical machinery system（9）, furnace rolls road servo electrical machinery system（10）, roller-way servo electricity after stove
Machine system（11）Including servomotor, controller, reductor, shaft coupling, motor and speed reducer base；First metal sensor
Device（5）With the second metal sensor（6）Output connects intelligent processing unit, stokehold the first roller-way servo electrical machinery system（8）, stokehold
Two roller-way servo electrical machinery systems（9）, furnace rolls road servo electrical machinery system（10）, roller-way servo electrical machinery system after stove（11）Motor is defeated
Go out electric signal and connect intelligent processing unit, intelligent processing unit output connects stokehold the first roller-way servo electrical machinery system（8）, stokehold second
Roller-way servo electrical machinery system（9）, furnace rolls road servo electrical machinery system（10）, roller-way servo electrical machinery system after stove（11）Controller；
The roller-way of stokehold second（2）It is L along the length of roller-way conveying direction1, furnace rolls road（3）Along the length of roller-way conveying direction
Spend for L2, roller-way after stove（4）It is L along the length of roller-way conveying direction3；
First, steel plate（12）Into charging roller table part, induction heater is then entered back into（7）Partial furnace rolls road（3）, sense
Heating system is answered to begin to warm up, when steel plate leaves induction heater completely（7）Roller-way after into stove（4）, then whole steel plates reached
To target temperature and temperature homogeneity；
The roller table speed closed loop control method is：When on production line without steel plate, the first metal sensor signal S1=0, stokehold
One roller-way keeps high speed V1, roller-way keeps the low velocity V of heating technological requirement after the roller-way of stokehold second, furnace rolls road, stove2；
Once steel plate enters the roller-way of stokehold second, the first metal sensor signal S through the roller-way of stokehold first1Become 1, the stove by 0
Preceding first roller table speed is immediately from V1Switch to V2；When steel plate has left the roller-way of stokehold first, the first metal sensor signal completely
S1When becoming 0 by 1, the roller table speed of stokehold first switches to 0；Delay t=（L1+L2）/V2+L3/V3Afterwards, the roller table speed of stokehold first is cut
It is changed to V1, now steel plate leave roller-way after stove completely；
The roller table speed of stokehold second and the furnace rolls road speed is always maintained at V2；
When steel plate leaves induction heater, the second metal sensor signal S2It is changed into roller table speed after 1, the stove from 0 to keep
V2Once, without steel plate in induction heater, then the second metal sensor signal S2It is changed into roller table speed after 0, stove from 1 to cut rapidly
It is changed to high speed V3, steel plate quickly leaves roller-way and enters roller-way high speed V after air cooling zone, stove3Hold time as t=L3/V3After cut
It is changed to low velocity V2；
In the first roller-way of stokehold, at full speed V1 enters the steel plate, and in stokehold, steel plate is moved with low velocity V2 during the second roller-way
And induction heater is entered to, when steel plate leaves induction heater into roller-way after stove completely, then at full speed V3 is moved.
2. the roller table speed closed loop control method of on-line continuous induction furnace according to claim 1, it is characterized in that：If steel plate
When need not heat, then the roller-way of stokehold first（1）, the roller-way of stokehold second（2）, furnace rolls road（3）With roller-way after stove（4）Speed is all provided with
It is set to high speed V1, induction heater（7）It is quick to open, allow steel plate to enter steel plate stockpiling area quickly through roller-way.
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| CN201410694408.3A CN105695726B (en) | 2014-11-27 | 2014-11-27 | The roller table speed closed loop control method of on-line continuous induction furnace |
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| CN201410694408.3A CN105695726B (en) | 2014-11-27 | 2014-11-27 | The roller table speed closed loop control method of on-line continuous induction furnace |
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| CN105695726B true CN105695726B (en) | 2017-08-25 |
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