CN106077553B - Weighing method is determined in continuous casting steel billet weight intelligent control diced system and continuous casting steel billet cutting - Google Patents
Weighing method is determined in continuous casting steel billet weight intelligent control diced system and continuous casting steel billet cutting Download PDFInfo
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- CN106077553B CN106077553B CN201610658219.XA CN201610658219A CN106077553B CN 106077553 B CN106077553 B CN 106077553B CN 201610658219 A CN201610658219 A CN 201610658219A CN 106077553 B CN106077553 B CN 106077553B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/163—Controlling or regulating processes or operations for cutting cast stock
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Abstract
Weighing method is determined in a kind of continuous casting steel billet weight intelligent control diced system and continuous casting steel billet cutting, it includes withdrawal-straightener speed detecting system, flame cutting system, steel billet weight computing system, steel billet gravimetric weighing system, withdrawal-straightener speed detecting system is detecting the instant rotating speed v of withdrawal straightening machine, withdrawal-straightener speed detecting system is connected with steel billet weight computing system, instant rotating speed v is sent to steel billet weight computing system, the steel billet instantaneous weight G0 that steel billet weight computing system instant computing is pulled out by withdrawal straightening machine, when G0 reaches or during close to split requirement weight G, steel billet weight computing system is sent to flame cutting system and steel billet is carried out to follow cutting, change afterwards control method of traditional steel billet weight using billet scaling length as segmentation cutting foundation, realize steel billet with the purpose of weight progress cutting section so as to reach.
Description
Technical field
The present invention relates to continuous-casting of steel billet technical field, specially a kind of continuous casting steel billet weight intelligent control diced system and
Weighing method is determined in the cutting of continuous casting steel billet.
Background technology
With the continuous progress of China Steel technical merit, continuous-casting of steel billet rises than constantly.Reach more than 96% at present,
But the no great progress of the control of steel billet weight after continuous casting, cut always using the cut lengths of steel billet as according to progress steel billet segmentation
Cut, weight is only reference index not as delivery foundation.Because steel billet is during motion is molded, changed by pulling rate, molten steel temperature
The influence of degree change, cooling condition change and crystallizer abrasion change, Unit Weight constantly change, and especially pulling rate is close to steel billet
Degree is had a great influence, so that under conditions of length is certain, deviation of weight is fluctuated in more than 10kg.Steel billet after steel rolling rolls,
The length change of steel is big, and what afterbody can not reach scale requirement cuts away or be included in random length material, causes very big waste and economy
The loss of benefit, therefore current steel billet carries out segmentation diced system with cut lengths and the defects of weight error is larger be present.
The content of the invention
To solve above-mentioned technical problem, spy of the present invention provides a kind of traditional steel billet weight of change with billet scaling
Afterwards control method of the length as segmentation cutting foundation, the system is using intelligent control thinking in advance, influence steel billet weight
Factor be classified in advance, substep make model, according in live practical operation influence steel billet weight various factors constantly change,
With the parameter in this instant Adjustable calculation model of change, to ensure that the instant computing of steel billet weight is accurate, steel is realized so as to reach
Base carries out the purpose of cutting section with weight.
For achieving the above object, the technical solution used in the present invention is：
A kind of continuous casting steel billet weight intelligent control diced system, it includes withdrawal-straightener speed detecting system, gas flame cuttiug system
System, steel billet weight computing system, steel billet gravimetric weighing system, withdrawal-straightener speed detecting system turn to detect the instant of withdrawal straightening machine
Fast v, withdrawal-straightener speed detecting system are connected with steel billet weight computing system, and instant rotating speed v is sent into steel billet weight calculates system
System, the steel billet instantaneous weight G0 that steel billet weight computing system instant computing is pulled out by withdrawal straightening machine, when G0 reaches or approached cutting
It is required that during weight G, steel billet weight computing system is sent to flame cutting system and steel billet is carried out to follow cutting, and steel billet weight is weighed
System is weighed the steel billet after cutting, and feedback result is sent into steel billet weight computing system.
Also include crystallizer water detecting system, be connected with steel billet weight computing system, the system predominantly detects cooling water
Water, water temperature data are sent to steel billet weight computing system, to adjust the instant bulkfactor of molten steel.
Steel billet weight computing system includes main frame, controller, and main frame is connected with controller, controller and flame cutting system
Connection, main frame are connected with withdrawal-straightener speed detecting system, steel billet gravimetric weighing system, crystallizer detecting system, withdrawal straightening machine steel billet
Velocity measuring includes velometer, and velometer is connected with withdrawal straightening machine, and velometer is connected with host data, and flame cutting system includes fire
Flame cutting machine is connected with controller circuitry, and main frame calculates withdrawal straightening machine and pulls out the weight G0 of steel billet and send instruction to controller in real time
Carry out the fixed point gas flame cuttiug of steel billet.
For described withdrawal straightening machine to clamp draw-bar formula withdrawal straightening machine, velometer mainly measures the rotary speed of withdrawal straightening machine draw-bar.
Described main frame receive the rotary speed data of draw-bar, the measurement of steel billet gravimetric weighing system actual steel billet weight data with
And crystallizer detecting system measure water, water temperature data, so as to carry out the instant adjustment of real-time steel billet bulkfactor.
A kind of to determine weighing method using the continuous casting steel billet cutting of above-mentioned continuous casting steel billet weight intelligent control diced system, it includes
Following steps：
The weight G of single branch steel billet requirement is set by steel billet weight computing system first, sets steel billet weight tolerance
D, the steel billet deviation of weight d values that setting computer calculates are within 1kg, influence model of the pulling rate to steel billet density（Calculate public
Formula）Carry out, input Computer Intelligent Control System；Withdrawal straightening machine starts, and is risen using billet flame cut point as what steel billet weight calculated
Point, the steel billet speed of service（Withdrawal-straightener speed）It is change, this speed instant playback main frame in steel billet weight computing system shows
Show on device, take this speed to input computing system, average operation of the steel billet in unit interval s is calculated in units of every millisecond of millimeter
Speed v, the steel billet operation average speed in certain time S is obtained, the weight G0 of the steel billet in time S is calculated, now calculates
The steel billet weight G0 gone out is compared with the weight G of steel billet requirement, i.e., G subtracts G0, if difference is less than deviation d values (G-G0 ﹤
1000g), then flame cutting system signal is given, flame cutting machine action carries out steel billet cutting；If difference is more than 1kg (G-G0
＞ 1000g), then steel billet, which is run forward, simultaneously, recalculates from steel billet head cutter point to current time S1, in time S1
Steel billet average running speed V1 is obtained, calculates steel billet weight G1 in time S1, steel billet weight G1 requires weight G ratios with steel billet
Compared with that is, G subtracts G1, if difference is less than 1kg (G-G1 ﹤ 1000g), gives flame cutting system signal, flame cutting machine action
Carry out steel billet cutting；If difference is more than 1kg (G-G1 ＞ 1000g), while steel billet is run, recalculate from steel billet
Head cutter point repeats above weight calculating process, until the steel billet weight calculated and desired steel to current time S2
Base weight difference is less than 1kg, and untill flame cutting machine carries out steel billet cutting section, then the weight of this root steel billet is calculated and cut
Into the weight that next steel billet is carried out using steel billet cut point as zequin is calculated and cut.
Steel billet weight carries out cutting section after closed loop is calculated and met the requirements, and the steel billet after cutting is weighed into steel billet is
System is weighed, and weight is actual weight after weighing, and compares the degree of conformity of actual weight and steel billet requirement weight G, i.e., actual weight
Amount subtracts steel billet requirement weight G, and whether gained difference is within steel billet weight demands deviation d.Such as actual weight and steel billet requirement
Weight G is not inconsistent, i.e., difference not steel billet setting deviation d within, then steel billet weight computing system readjust accordingly adjust it is close
Model value is spent, steel billet actual weight that Computer Intelligent Control System calculates is drawn with steel billet requirement weight G's until next
Difference is requiring in deviation range d that calculating of the whole steel billet intelligence control system to steel billet weight reaches metastable state, respectively
Parameter model no longer adjusts, and realizes the steel billet intelligently fixed purpose cut again.
Steel billet weight calculation formula：
Steel billet requires that weight G- calculates gained steel billet weight G0 ﹤ 1000g
I.e.：Steel billet requires weight G- steel billets operation average speed V × crystallizer inner area（It is long × wide）× the time × steel billet
Density p ﹤ 1000g
Beneficial effects of the present invention are：Spy of the present invention is provided a kind of traditional steel billet weight of change and made with billet scaling length
For the control method afterwards of segmentation cutting foundation, the system is using intelligent control thinking in advance, the factor of influence steel billet weight
Classification in advance, substep make model, are constantly changed according to the various factors that steel billet weight is influenceed in live practical operation, with this change
Change the parameter in instant Adjustable calculation model, to ensure that the instant computing of steel billet weight is accurate, realize steel billet with reality so as to reach
Border pulls out the purpose that weight carries out cutting section, greatly improves steel billet cutting weight accuracy, effectively prevent because of cutting
Waste caused by inaccuracy.
Brief description of the drawings
Fig. 1 is present system framework schematic diagram；
Fig. 2 is influence chart of the change of the pulling steel billet speed of service to density.
Embodiment
Technical solution of the present invention is described in detail below in conjunction with specific embodiment：
A kind of continuous casting steel billet weight intelligent control diced system, it includes withdrawal-straightener speed detecting system, gas flame cuttiug system
System, steel billet weight computing system, steel billet gravimetric weighing system, withdrawal-straightener speed detecting system turn to detect the instant of withdrawal straightening machine
Fast v, withdrawal-straightener speed detecting system are connected with steel billet weight computing system, and instant rotating speed v is sent into steel billet weight calculates system
System, the steel billet instantaneous weight G0 that steel billet weight computing system instant computing is pulled out by withdrawal straightening machine, when G0 reaches or approached cutting
It is required that during weight G, steel billet weight computing system is sent to flame cutting system and steel billet is carried out to follow cutting, and steel billet weight is weighed
System is weighed the steel billet after cutting, and feedback result is sent into steel billet weight computing system；Also include crystallizer to detect
System, it is connected with steel billet weight computing system, it is instant to adjust molten steel that the system predominantly detects cooling water water, water temperature data
Bulkfactor.
Example：Steel mill usually requires that steel billet length is 12m at present, and steel billet section is 150 × 150mm2, weight demands 2100
±1kg.In steel billet weight intelligence control system, using weight as standard, set steel billet and require weight G as 2100kg, steel billet meter
Calculate the kg of weight tolerance 1.Steel billet pulling rate is in 2.5m/ points to 2.7m//changes.For improve counting accuracy, pulling rate with
Millimeter/millisecond calculates for unit.I.e. steel billet pulling rate changes in 4.17 millimeters/millisecond between 4.5 millimeters/millisecond.When beginning work
When making, the starting point that is calculated using billet flame cut point as steel billet weight.The steel billet speed of service（Withdrawal-straightener speed）It is often to change
, this speed is constantly shown on conticaster control computer display.Pulling rate such as the 1st millisecond is 4.2 millimeters/millisecond, the
One millisecond of the average steel billet speed of service is 4.2 millimeters/millisecond, and now corresponding steel billet density is 7.600g/cm 3, its weight
It is calculated as：4.2 10 × 15 × 15 × 1 × 7.600=718.2g of ÷, steel billet require weight 2100kg, steel billet requirement after first millisecond
The steel billet weight difference that weight calculates with steel billet intelligence control system is：2100000g-718.2 the g of g=2099281.8,
2099281.8 ＞ 1000（1kg）（Similarly hereinafter）, system do not give flame cutting machine signal, and steel billet continues to run with, control with computational intelligence
System recalculates steel billet weight in second millisecond, and such as second millisecond of steel billet speed of service is 4.4 millimeters/millisecond, Computing Intelligence
Energy control system calculates steel billet average running speed in two milliseconds（4.2+4.4）Millimeters/millisecond of ÷ 2=4.3, it is now corresponding
Steel billet density is 7.550g/cm 3, Computer Intelligent Control System changes steel billet density value by 7.600g/cm automatically 3For 7.550g/
cm 3, the gross weight of steel billet is calculated as 4.3 10 × 15 × 15 × 2 × 7.550=1460.925g of ÷ in two milliseconds, it is desirable to weight
2100kg, steel billet requires that the steel billet weight difference that weight calculates with steel billet intelligence control system is after second millisecond：
2100000g-1460.925g=2098539.08 g, 2098539.08 ＞ 1000, system does not give flame cutting machine signal, steel billet
Continue to run with, Computer Intelligent Control System recalculates steel billet weight in the 3rd millisecond, goes to seek steel billet in (n+1)th millisecond repeatedly
Average speed and weight are run, such as to the 2874th millisecond, the average steel billet speed of service now obtained is 4.3 millimeters/millisecond, right
The steel billet density answered is 7.550g/cm 3, it is 7.550g/cm that Computer Intelligent Control System changes steel billet density value automatically 3, 2874
The gross weight of steel billet is calculated as 4.3 10 × 15 × 15 × 2874 × 7.55=2099349.23g of ÷ in millisecond, after the 2874th millisecond
Steel billet requires that the steel billet weight difference that weight calculates with steel billet intelligence control system is：2100000g-2099349.23 g=
650.77g, 650.77 ﹤ 1000, Computer Intelligent Control System give flame cutting system signal, and flame cutting machine is acted to steel billet
To be cut, the cutting of this branch steel billet is completed, and the weight that steel billet Computer Intelligent Control System re-starts next steel billet calculates,
Cutting section.
Steel billet after cutting section is weighed into Bloom Weighting System, and weight is actual weight after weighing, such as above
Actual weight is 2099kg after the steel billet of calculating is weighed（The precision of weighing system will be 1kg）, actual weight 2099kg and steel billet
It is required that weight 2100kg compares, i.e., actual weight subtracts steel billet requirement weight G, 2099-2100=- 1kg, and this -1 kg value is in steel billet
Within weight demands deviation ± 1kg, steel billet intelligence control system is not adjusted to parameters, and next is carried out with current parameter
The calculating and cutting of steel billet.Steel billet actual weight after the segmentation weighed such as weighing system is 2103kg, actual weight
Compared with 2103kg requires weight 2100kg with steel billet, i.e., actual weight subtracts steel billet requirement weight G, 2106-2100=3kg, and this 3
Not within steel billet weight demands deviation ± 1kg, steel billet intelligence control system is adjusted kg values to density parameter, such as by
7.550g/cm 3It is down to 7.545g/cm 3（Density Adjustment precision is 0.001 g/cm 3/ time）, Computing Intelligence is drawn until next
The steel billet actual weight and the kg of steel billet requirement weight 2100 difference that energy control system calculates are requiring deviation range ± 1kg
It is interior.Whole calculating of the steel billet intelligence control system to steel billet weight reaches metastable state, and each parameter is no longer adjusted, realized
Steel billet intelligently determines the purpose cut again.
It is close that the abrasion of the steel billet speed of service, steel grade, liquid steel temperature, cooling water intensity of cooling and crystallizer directly affects steel billet
Spend ρ change.Main influence numerical value of the clear and definite variable speed V to steel billet density p in a model.According to the steel billet speed of service at any time
Adjust density p value.
Liquid steel temperature is because no more than 10 DEG C -20 DEG C, tundish must have guarantor for molten steel overheat requirement when steel billet is poured into a mould
Warm measure, liquid steel temperature change it is small, between 10 DEG C -20 DEG C, molten steel is changed into solid-state process from liquid, temperature it is small size
Change varies less to steel billet density, can be considered no influence.The steel transportation amount of crystallizer is more than 6000 tons, the abrasion of crystallizer
Because varying less and slowly, being considered as on the density value of a steel billet without influence（Area is considered as constant）, in a set of crystallizer life-span
In cycle, influence coefficient only is adjusted after newly crystallizer is changed, the effect of attrition of crystallizer is incorporated to pulling rate during use
Steel billet Effects of Density coefficient is adjusted.Molten steel is changed into solid-state from liquid to be completed in crystallizer, otherwise just occurs
Bleedout accident.To ensure to occur without molten steel bleedout accident, it is desirable to which molten steel necessary four sides in crystallizer condense shelling, four sides crust
The quality that pulls out after crystallizer in its unit area of steel billet would not also change, but density is to change at any time.Therefore crystallize
The cooler-water temperature of device, water are detected, and ensure the stability of cooling result.The intensity of cooling necessarily influence to steel billet density
It can be considered constant.
In the chemical composition of steel（Steel grade）On the premise of certain, influence of the change of the steel billet speed of service to density is pulled such as
Shown in Fig. 2,
It can be seen that after molten steel is changed into solid-state from liquid, the change of speed and steel billet density are substantially linear.Pulling rate Gao Gang
For the density of base with regard to low, the density of the low steel billet of pulling rate is just high.Steel billet influence factor reference model is with the chemical composition of steel, steel billet pulling rate
Based on design.
Claims (7)
1. a kind of continuous casting steel billet weight intelligent control diced system, it is characterized in that：It includes withdrawal-straightener speed detecting system, flame
Diced system, steel billet weight computing system, steel billet gravimetric weighing system, withdrawal-straightener speed detecting system is detecting withdrawal straightening machine
Instant rotating speed v, withdrawal-straightener speed detecting system are connected with steel billet weight computing system, and instant rotating speed v is sent into steel billet weight
Computing system, the steel billet instantaneous weight G0 that steel billet weight computing system instant computing is pulled out by withdrawal straightening machine, when G0 reaches or connects
During nearly split requirement weight G, steel billet weight computing system is sent to flame cutting system and steel billet is carried out to follow cutting, steel billet weight
Amount weighing system is weighed the steel billet after cutting, and feedback result is sent into steel billet weight computing system.
2. continuous casting steel billet weight intelligent control diced system according to claim 1, it is characterized in that：Also include crystallizer to use
Water detecting system, it is connected with steel billet weight computing system, the system predominantly detects cooling water water, water temperature data is sent to steel billet
Weight computing system, to adjust the instant bulkfactor of molten steel.
3. continuous casting steel billet weight intelligent control diced system according to claim 1, it is characterized in that：Steel billet weight calculates system
System includes main frame, controller, and main frame is connected with controller, and controller is connected with flame cutting system, main frame and withdrawal-straightener speed
Detecting system, steel billet gravimetric weighing system, crystallizer are connected with water detecting system, and withdrawal-straightener speed detection includes velometer, surveys
Fast device is connected with withdrawal straightening machine, and velometer is connected with host data, and flame cutting system includes flame cutting machine and controller circuitry
Connection, main frame calculates the weight G0 of withdrawal straightening machine pull-out steel billet and sent to controller in real time instructs the fixed point flame for carrying out steel billet to cut
Cut.
4. continuous casting steel billet weight intelligent control diced system according to claim 3, it is characterized in that：Withdrawal straightening machine draws to clamp
Rod formula withdrawal straightening machine, described velometer mainly measure the rotary speed of withdrawal straightening machine draw-bar.
5. continuous casting steel billet weight intelligent control diced system according to claim 3, it is characterized in that：Described main frame receives
Rotary speed data, actual the steel billet weight data and crystallizer of the measurement of steel billet gravimetric weighing system of draw-bar are surveyed with water detecting system
The water that takes, water temperature data, so as to carry out the instant adjustment of real-time steel billet bulkfactor.
6. a kind of continuous casting steel billet using any described continuous casting steel billet weight intelligent control diced systems of claim 1-5 is cut
Determine weighing method, it is characterized in that：It comprises the following steps：The weight of single branch steel billet requirement is set by steel billet weight computing system first
G is measured, sets steel billet weight tolerance d, the steel billet deviation of weight d values that setting computer calculates are within 1kg, and pulling rate is to steel
The influence model of base density is carried out, and inputs Computer Intelligent Control System；Withdrawal straightening machine starts, using billet flame cut point as steel billet
The starting point that weight calculates, withdrawal-straightener speed are changes, and this speed instant playback main frame in steel billet weight computing system is shown
On device, take this speed to input computing system, average operation speed of the steel billet in unit interval S is calculated in units of every millisecond of millimeter
V is spent, the steel billet operation average speed in certain time S is obtained, calculates the weight G0 of the steel billet in time S, now calculate
Steel billet weight G0 compared with the weight G that steel billet requires, i.e., G subtracts G0, if difference is less than deviation d values (G-G0 ﹤ 1000g),
Flame cutting system signal is then given, flame cutting machine action carries out steel billet cutting；If difference is more than 1kg (G-G0 ＞
1000g), then steel billet runs simultaneously, recalculate from steel billet head cutter point to current time S1 forward, is asked in time S1
Go out steel billet average running speed V1, calculate steel billet weight G1 in time S1, compared with steel billet weight G1 requires weight G with steel billet,
I.e. G subtracts G1, if difference is less than 1kg (G-G1 ﹤ 1000g), gives flame cutting system signal, flame cutting machine act into
Row steel billet is cut；If difference is more than 1kg (G-G1 ＞ 1000g), while steel billet is run, recalculate from steel billet head
Portion's cut point repeats above weight calculating process, until the steel billet weight calculated and desired steel billet to current time S2
Weight difference is less than 1kg, and untill flame cutting machine carries out steel billet cutting section, then the weight of this root steel billet is calculated and cut
Into the weight that next steel billet is carried out using steel billet cut point as zequin is calculated and cut.
7. weighing method is determined in continuous casting steel billet cutting according to claim 6, it is characterized in that：It is further comprising the steps of, steel billet weight
Amount carries out cutting section after closed loop is calculated and met the requirements, and the steel billet after cutting is weighed into Bloom Weighting System, is claimed
Weight is actual weight after weight, compares the degree of conformity of actual weight and steel billet requirement weight G, i.e. actual weight subtracts steel billet requirement
Weight G, whether gained difference is within steel billet weight demands deviation d, as actual weight and steel billet require that weight G is not inconsistent, i.e., poor
Value is not within the deviation d of steel billet setting, then steel billet weight computing system readjusts corresponding density model value, until next
The steel billet actual weight calculated with Computer Intelligent Control System and steel billet requirement weight G difference are requiring deviation range d
Interior, calculating of the whole steel billet intelligence control system to steel billet weight reaches metastable state, the calculation formula of each parameter structure
Model no longer adjusts.
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