CN114589020A - Oil coating amount control device and method for electrostatic oiling machine - Google Patents
Oil coating amount control device and method for electrostatic oiling machine Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims description 41
- 238000000576 coating method Methods 0.000 title claims description 41
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- 238000012937 correction Methods 0.000 claims description 34
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- 238000011217 control strategy Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
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- 230000001276 controlling effect Effects 0.000 description 4
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- 238000010008 shearing Methods 0.000 description 2
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- 230000005856 abnormality Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
- B05B12/124—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to distance between spray apparatus and target
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to an oiling control device and method for an electrostatic oiling machine, wherein the control device comprises the electrostatic oiling machine, a velocimeter, an oil flow meter and a controller, wherein the controller is simultaneously connected with the electrostatic oiling machine, the velocimeter and the oil flow meter; wherein, electrostatic oiler includes: the device comprises an upper surface high-voltage power supply, an upper surface metering pump, an upper surface spray beam, a lower surface high-voltage power supply, a lower surface metering pump and a lower surface spray beam, wherein the velocimeter is used for measuring the conveying speed of the strip steel and sending the strip steel to the controller; the two oil flow meters are respectively arranged in a pipeline between the upper surface metering pump and the upper surface spray beam and a pipeline between the lower surface metering pump and the lower surface spray beam and are respectively used for measuring the actual oil output of the upper surface metering pump and the actual oil output of the lower surface metering pump; the controller has the function of carrying out data communication with the tachymeter, the oil flow meter and the electrostatic oiler, and has the functions of data calculation and storage.
Description
Technical Field
The invention relates to a control device, in particular to an oil coating amount control device and method for an electrostatic oiling machine, and belongs to the field of metal surface treatment.
Background of the invention
In cold rolling plants, an electrostatic oiling machine is often adopted to spray oil on the upper surface and the lower surface of the strip steel so as to achieve the effects of preventing the surface of the strip steel from being scratched and preventing rust. Common electrostatic oilers include spray beam type and rotary cup type. Referring to fig. 1, the spray beam type electrostatic oiler includes: the device comprises an upper surface high-voltage power supply 1, an upper surface metering pump 2, an upper surface spray beam 3, a lower surface high-voltage power supply 4, a lower surface metering pump 5 and a lower surface spray beam 6; under the atomization effect of high-voltage static electricity, the rust preventive oil output by the metering pump is uniformly coated on the upper and lower surfaces of the strip steel 7. The oil coating amount is different according to the product application and the user requirement, if the oil coating amount is too large, the oil coating amount does not meet the customer requirement, the cost is increased, and if the oil coating amount is too small, the scratch and the corrosion defects on the surface of the strip steel are easily generated.
If the amount of the anti-rust oil sprayed by the electrostatic oiling machine is controlled, and the strip steel passes through the electrostatic oiling machine at a constant speed, the oiling amount on the surface of the strip steel is accurate and uniform. However, the practical situation is that 1) the oil coating amount on the surface of the strip steel is obviously influenced by unsmooth oil circuit or abnormal oil outlet of a metering pump and is difficult to find; 2) the electrostatic oiling machine, especially the spray beam type electrostatic oiling machine, has obvious time lag from the formation of the oil output control instruction to the arrival of the oil output of the instruction on the surface of the strip steel; 3) due to handling of emergency events such as: the method comprises the steps of checking unit equipment, confirming the surface state of strip steel or shearing the head and the tail of the strip steel and the like, wherein the conveying speed of the strip steel is fluctuated frequently and even rapidly reduced in the actual production process. Therefore, the problems of inaccurate oil coating amount and uneven oil coating caused by the fact that the oil output amount is inaccurate and the oil output adjusting speed cannot keep up with the speed change of the strip steel easily occur. When a certain steel mill adopts a spray beam type electrostatic oiling machine to oil the surface of the pickled plate, the error between the actual oil coating amount and the set oil coating amount exceeds +/-30 percent, and the oil coating amount at the head and the tail exceeds 5 times of the set amount, so that a plurality of quality complaints of customers are caused. Therefore, the development of a control device and a control method capable of improving the accuracy of the band steel oiling amount and the oiling uniformity is urgently needed.
Retrieving patent application 202010763582.4, the method automatically captures the oil coating amount data of the test process sample closest to the current time through a fixed period, and then calculates the oil coating efficiency, namely: and (4) adjusting and controlling the oil coating amount by using the oil coating efficiency. In the invention, the oil coating amount data of the detection test is lagged (for example, the data can be obtained after 3 hours), so that the precise control of the oil coating amount and the oil coating uniformity on the current production strip steel cannot be realized.
A public patent CN201710827174 is retrieved, and a galvanized wire electrostatic oil coating system, an oil coating control method and an oil coating control device are disclosed. The method mainly feeds oil film data obtained by measuring through an oil film thickness gauge back to the electrostatic oiling machine, so that the oiling amount of the electrostatic oiling machine is controlled according to the oil film data, and the purpose of improving the thickness uniformity of the oil film coated by the electrostatic oiling machine is achieved. The invention does not relate to the consideration of the change of the conveying speed of the strip steel, so the invention can not solve the problems of quickly following the speed change of the unit and improving the accuracy of the oil coating amount and the uniformity of the oil coating. Therefore, there is an urgent need for a new solution to the above-mentioned problems of the invention.
Disclosure of Invention
The invention provides an oiling amount control device and method of an electrostatic oiling machine, aiming at the problems in the prior art, and the device and method are used for solving the invention problems of large oiling amount deviation and uneven oiling of the electrostatic oiling machine.
In order to achieve the above purpose, according to the scheme of the invention, the oil coating amount control device for the electrostatic oiling machine comprises an electrostatic oiling machine 8, a velocimeter 9, an oil flow meter 10 and a controller 11, wherein the controller 11 is simultaneously connected with the electrostatic oiling machine 8, the velocimeter 9 and the oil flow meter 10; wherein, electrostatic oiler 8 includes: the device comprises an upper surface high-voltage power supply 1, an upper surface metering pump 2, an upper surface spray beam 3, a lower surface high-voltage power supply 4, a lower surface metering pump 5 and a lower surface spray beam 6, wherein a velocimeter 9 is used for measuring the conveying speed of the strip steel 7 and sending the conveying speed to a controller 11; the two oil flow meters 10 are respectively arranged in a pipeline between the upper surface metering pump 2 and the upper surface spray beam 3 and a pipeline between the lower surface metering pump 5 and the lower surface spray beam 6 and are respectively used for measuring the actual oil output of the upper surface metering pump and the actual oil output of the lower surface metering pump; the controller 11 has a function of data communication with the speedometer 9, the oil flow meter 10 and the electrostatic oiler 8, and a function of data calculation and storage.
A control method of an oiling amount control device of an electrostatic oiling machine comprises the following steps:
s1, measuring the correction coefficient k of the oil output Q of the metering pump at different rotating speeds R by using the oil flow meterRWherein k isRTheoretical yieldOil/measured oil (R x D)/Q, and a database is established comprising: r and kRAnd stored in the controller for standby;
wherein Q is the actually measured oil output ml/min under the rotating speed R; r: the rotating speed of a metering pump is r/min; d: displacement of pump, ml/r
S2, summarizing the production experience according to C vtGrouping values, and establishing a conventional control strategy library, wherein the conventional control strategy library comprises the following steps: c vtValue, and corresponding speed correction factor ksv1(ii) a And storing the data in the controller for standby;
wherein, C: set value of oil coating amount, g/m2；Vt: the real-time transmission speed of the strip steel is m/min;
s3, summarizing the production experience according to C vtGrouping values, and establishing a rapid speed reduction control strategy library, wherein the rapid speed reduction control strategy library comprises the following steps: v. ofkValue, C x vtValue, and corresponding speed correction factor ksv2(ii) a And storing the data in the controller for standby;
wherein, Vk: controlling the trigger speed at m/min by quickly reducing the speed;
s4, calculating the theoretical rotating speed R of the metering pump
Theoretical rotation speed R:
r: rotating speed of a metering pump, r/min;
Vt: the production speed of the machine set is m/min;
w: oiling width, m;
c: set value of oil coating amount, g/m2
S: specific gravity of oil, 0.9 g/ml;
d: the discharge capacity of the pump, ml/r;
s5, calculating a rotation speed correction value R';
wherein R' is R.kR
S6, using the rotation speed correction value R' for the rotation speed control of the oiling machine;
s7, collecting the oil output Q of the metering pump in real time, and giving an alarm when the Q/(D R') value is < Qa or > Qb;
wherein, Qa: an oil output alarm lower limit value; qb: an oil output alarm upper limit value;
s8, acquiring the transmission speed v of the strip steel in real timet+1And rapidly controlling the trigger speed VkAnd VtComparing: if v ist+1≤VkAnd v ist+1<VtThen, the control is switched to S10 for fast speed reduction control; otherwise, executing S9 normal control;
s9, conventional fluctuation control: 1) vt+1→Vt(ii) a 2) Calculating out
3) Inquiring a database according to the R value to obtain an oil output correction value kRAccording to C x vtGrouping values, querying a database to obtain a conventional fluctuation oiling control correction coefficient kcv1(ii) a 4) Calculating R ═ R · kR·kcv1(ii) a 5) Turning to S6;
s10, fast speed reduction control: 1) vt+1→Vt(ii) a 2) Computing
3) Inquiring a database according to the R value to obtain an oil output correction value kRAccording to C x vtGrouping values, inquiring a database to obtain a conventional fluctuation oiling control correction coefficient kcv1And a rapid fluctuation correction coefficient kcv2(ii) a 4) Calculating R' ═ R.kR·kcv1·kcv2(ii) a 5) Go to S6.
Compared with the prior art, the oil flow meter has the advantages that the oil flow meter is arranged in the pipeline between the metering pump and the spray beam, so that the actual oil output of the metering pump can be monitored in real time, abnormality can be found in time, the alarm processing is carried out, and the obvious deviation of the oil output caused by the abnormal oil output is avoided. In the control strategy database of the present invention, the control strategy is expressed as C x vtThe values are grouped, due to the argument C vtMeanwhile, two key factors which influence the oiling effect, namely the oiling amount set value and the strip steel conveying speed, are covered, so that the grouping method is more scientific and reasonable; the conventional control method obtains the oiling control experience under the conventional fluctuation of the unit speed by summarizing the oiling control experienceConventional control correction coefficient kcv1The deviation between the actual oil coating amount and the set oil coating amount after application can be kept within +/-15%. Further, on the basis of 3), to eliminate such as: the influence of the quick speed reduction of the unit on the oil coating amount and the oil coating uniformity during the head and tail shearing of strip steel, equipment failure or emergency shutdown is also introduced, and the quick speed reduction correction empirical coefficient k is also introducedcv2After the application, the deviation between the actual oil coating quantity of the head and the tail of the strip steel and the set oil coating quantity can be controlled within +/-50%. In a word, the invention can find the oil circuit blockage problem and the obvious abnormity of the actual oil output in time, and performs the oiling amount control in a predictive and overlapping way from the two aspects of conventional prevention and rapid speed reduction prevention, thereby better solving the actual problem that the fluctuation of the strip steel transmission speed influences the accurate control of the oiling amount in the production process of the cold-rolled strip steel and obviously improving the accuracy of the oiling amount and the oiling uniformity of the strip steel.
Drawings
FIG. 1 is a schematic diagram of a conventional spray beam electrostatic oiler;
FIG. 2 is a schematic view of the installation position of the oil flowmeter of the present invention;
FIG. 3 is a schematic diagram of the control apparatus of the present invention;
FIG. 4 is a control flow diagram of the oiling control method of the invention.
In the figure: 1-upper surface high-voltage power supply, 2-upper surface metering pump, 3-upper surface spray beam, 4-lower surface high-voltage power supply, 5-lower surface metering pump, 6-lower surface spray beam, 7-strip steel, 8-electrostatic oiling machine, 9-velocimeter, 10-oil flow meter and 11-controller.
The specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1, an oiling amount control device of an electrostatic oiling machine comprises an electrostatic oiling machine 8, a velocimeter 9, an oil flow meter 10 and a controller 11, wherein the controller 11 is simultaneously connected with the electrostatic oiling machine 8, the velocimeter 9 and the oil flow meter 10; wherein, electrostatic oiler 8 includes: the device comprises an upper surface high-voltage power supply 1, an upper surface metering pump 2, an upper surface spray beam 3, a lower surface high-voltage power supply 4, a lower surface metering pump 5 and a lower surface spray beam 6, wherein a velocimeter 9 is used for measuring the conveying speed of the strip steel 7 and sending the conveying speed to a controller 11; the two oil flow meters 10 are respectively arranged in a pipeline between the upper surface metering pump 2 and the upper surface spray beam 3 and a pipeline between the lower surface metering pump 5 and the lower surface spray beam 6 and are respectively used for measuring the actual oil output of the upper surface metering pump and the actual oil output of the lower surface metering pump; the controller 11 has a function of data communication with the speedometer 9, the oil flow meter 10 and the electrostatic oiler 8, and a function of data calculation and storage. The oiling machine 8 is of an upper and lower spray beam type structure, wherein the upper surface spray beam 3 and the lower surface spray beam 4 are respectively fixed on the upper arm and the lower arm of the C-shaped frame, and the C-shaped frame is moved into the strip steel transmission channel, so that the upper surface spray beam 3 and the lower surface spray beam 4 are respectively parallel to the upper surface and the lower surface of the strip steel and keep a certain distance with the upper surface and the lower surface of the strip steel. The upper surface metering pump is connected with the oil tank at one end and the upper spraying beam at the other end through a pipeline, and reaches the required rotating speed according to the instruction of the controller, so that the required oil volume (ml/min) is output to the upper surface spraying beam. The connection relationship of the metering pump on the lower surface is the same as that of the metering pump on the lower surface. The negative direct current high voltage of the upper surface high voltage power supply is connected with the upper spray beam, and the required high voltage (kV) is output according to the instruction of the controller, so that a voltage difference is formed between the upper surface spray beam and the strip steel serving as the grounding electrode, and the anti-rust oil in the upper spray beam is excited into mist and uniformly sprayed on the surface of the strip steel. The same applies to the lower surface high voltage.
The high voltage ranges of the upper surface and the lower surface are both (30-80) kV. The length of the upper and lower knife beams is 1.8 m. The design discharge capacity D of the metering pump is 2.5ml/r, and the single-side oil coating amount range is as follows: (0.5-2.0) g/m2. The velocimeter 9 adopts a structural form of a measuring roller and an encoder. The oil flowmeter 10 adopts a VS0.02 gear type positive displacement flowmeter of VSE company, and the measurement range is (2-2000) ml/min. The controller 11 adopts a Siemens S7-1500 type programmable controller, and has the functions of data communication with the electrostatic oiler 8, the velocimeter 9 and the oil flowmeter 10, and data storage and calculation.
Wherein, 2 oil flow meters 10 are respectively arranged in the pipeline between the upper surface metering pump 2 and the upper surface spray beam 3 and the pipeline between the lower surface metering pump 5 and the lower surface spray beam 6, and are respectively used for measuring the actual oil output of the upper surface metering pump and the lower surface metering pump.
Example 2:
a method for compensating oil output error of a metering pump. The beam-spraying electrostatic oiler 8 in the embodiment 1 is adopted, and the oil output Q of the metering pump at different rotating speeds R is obtained by actual measurement through an oil flow meter 10, as shown in the following table, and according to the formula: k is a radical ofRCalculating the oil yield correction coefficient kR。
Example 3:
an oil coating amount control method for an electrostatic oiling machine. Referring to fig. 4, the electrostatic oiler according to embodiment 1 and the oil output correction coefficient table according to embodiment 2 are adopted, and the method includes the following steps:
s1, measuring the oil output correction value k of the metering pump at different rotating speeds R by using the oil flow meterRWherein k isRThe measured oil yield under theoretical oil yield/rotating speed R is obtained, and a database is established, wherein the database comprises the following components: r and kRAnd stored in the controller for later use. Wherein Q is the actually measured oil output ml/min under the rotating speed R; r: rotating speed of a metering pump, r/min; d: theoretical displacement of the pump, ml/r
S2, summarizing the production experience according to C vtThe values are grouped, and a conventional control strategy library is established for regulating the rotating speed of the metering pump when the speed of the unit fluctuates conventionally. The method comprises the following steps: c vtValue and corresponding correction factor k for the theoretical speed of rotation R of the metering pumpsv1(ii) a Storing in the controller for standby;
| C*vt | conventional control correction coefficient kcv1 |
| (0-10] | 1.35 |
| (10-20] | 1.25 |
| (20-30] | 1.23 |
| (30-60] | 1.2 |
| (60-100] | 1.15 |
| (100-150] | 1.18 |
| (150-250] | 1.2 |
| (250-350] | 1.25 |
| (350-650] | 1.3 |
S3, summarizing the production experience according to C vtAnd grouping the values, and establishing a rapid speed reduction control strategy library for adjusting the rotating speed of the metering pump when the speed of the unit is rapidly reduced. The method comprises the following steps: trigger speed value V for fast speed reduction controlk，C*vtValue and corresponding correction coefficient k of theoretical rotating speed R of metering pumpsv2(ii) a Storing in the controller for standby;
| C*vt | fast control of correction value kcv2 |
| (0-10] | 1.35 |
| (10-20] | 1.15 |
| (20-30] | 1.05 |
| (30-45] | 1.05 |
| (45-60] | 1.1 |
| (60-100] | 1.15 |
S4, calculating the theoretical rotating speed R of the metering pump
Calculating the formula:
r: rotational speed of the metering pump, r/min
Vt: real-time transmission speed of strip steel at time t, m/min
W: width of oil applied, mm
C: set value of oil coating amount, g/m2
S: specific gravity of oil, 0.9g/ml
D: displacement of pump, ml/r
S5, calculating a rotation speed correction value R', and calculating a formula: r' ═ R.kR
S6, using the rotation speed correction value R' for the rotation speed control of the oiling machine;
s7, collecting oil output Q of the metering pump in real time, and setting an oil output alarm lower limit value QaAnd an upper limit value QbAnd in Q/(D R')<QaOr>QaAnd alarming.
S8, acquiring the transmission speed v of the strip steel in real timet+1And rapidly controlling the trigger speed VkAnd VtComparing: if v ist+1≤VkAnd v ist+1<VtThen, the control is switched to S10 for fast speed reduction control; otherwise, executing S9 normal control;
s9, conventional control: 1) vt+1→Vt(ii) a 2) Computing
3) According to R and C x vtGrouping values, inquiring a database to obtain a corrected oil quantity value kRAnd a correction coefficient k for routine control of the amount of oil appliedcv1(ii) a 4) Calculating R' ═ R.kR·kcv1(ii) a 5) Go to S6
S10, fast speed reduction control: 1) vt+1→Vt(ii) a 2) Computing
3) According to R and C vtGrouping values, inquiring a database to obtain a corrected oil quantity value kRAnd a correction coefficient k for routine control of the amount of oil appliedcv1And a correction coefficient kcv2(ii) a 4) Calculating R' ═ R · kR·kcv1·kcv2(ii) a 5) Go to S6
Reducing the speed of the strip steel 1: width 960 mm: the oil coating set value C is 1.0g/m2Quickly control the trigger speed Vk＝50m/min,
2, raising the speed of the strip steel: width 1200 mm: the oil coating set value C is 0.5g/m2And, the trigger speed V is controlled by fast speed reductionk＝50m/min。
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent modifications made on the basis of the above-mentioned embodiments are within the scope of the present invention.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent changes and substitutions made on the basis of the above-mentioned embodiments are included in the scope of the present invention as defined by the appended claims.
Claims (2)
1. An oiling amount control device of an electrostatic oiling machine is characterized by comprising the electrostatic oiling machine 8, a velocimeter 9, an oil flow meter 10 and a controller 11, wherein the controller 11 is simultaneously connected with the electrostatic oiling machine 8, the velocimeter 9 and the oil flow meter 10; wherein, electrostatic oiler 8 includes: the device comprises an upper surface high-voltage power supply 1, an upper surface metering pump 2, an upper surface spray beam 3, a lower surface high-voltage power supply 4, a lower surface metering pump 5 and a lower surface spray beam 6, wherein a velocimeter 9 is used for measuring the conveying speed of the strip steel 7 and sending the conveying speed to a controller 11; the two oil flow meters 10 are respectively arranged in a pipeline between the upper surface metering pump 2 and the upper surface spray beam 3 and a pipeline between the lower surface metering pump 5 and the lower surface spray beam 6 and are respectively used for measuring the actual oil output of the upper surface metering pump and the actual oil output of the lower surface metering pump; the controller 11 has a function of data communication with the speedometer 9, the oil flow meter 10 and the electrostatic oiler 8, and a function of data calculation and storage.
2. The method for controlling the oiling amount of the electrostatic oiling machine as defined in claim 1, wherein the method comprises the following steps:
s1, measuring the correction coefficient k of the oil output Q of the metering pump at different rotating speeds R by using the oil flow meterRWherein k isRAnd (R) D/Q, and establishing a database, wherein the database comprises: r and kRAnd stored in the controller for standby;
wherein Q is the actually measured oil output ml/min under the rotating speed R; r: rotating speed of a metering pump, r/min; d: displacement of pump, ml/r
S2, summarizing the production experience according to C vtGrouping values to establish a conventional control strategy library, comprising: c vtValue, and corresponding speed correction factor ksv1(ii) a And storing the data in the controller for standby;
wherein, C: set value of oil coating amount, g/m2；Vt: the real-time transmission speed of the strip steel is m/min;
s3, summarizing the production experience according to C vtGrouping values, and establishing a rapid speed reduction control strategy library, wherein the rapid speed reduction control strategy library comprises the following steps: v. ofkValue, C vtValue, and corresponding speed correction factor ksv2(ii) a And storing the data in the controller for standby;
wherein, Vk: controlling the trigger speed at m/min by quickly reducing the speed;
s4, calculating the theoretical rotating speed R of the metering pump
Theoretical rotation speed R:
r: rotating speed of a metering pump, r/min;
Vt: the production speed of the machine set is m/min;
w: oiling width, m;
c: set value of oil coating amount, g/m2
S: specific gravity of oil, 0.9 g/ml;
d: the discharge capacity of the pump, ml/r;
s5, calculating a rotation speed correction value R';
wherein R' is R.kR
S6, using the rotation speed correction value R' for the rotation speed control of the oiling machine;
s7, collecting the oil output Q of the metering pump in real time, and giving an alarm when the Q/(D R') value is < Qa or > Qb;
wherein, Qa: an oil output alarm lower limit value; qb: an oil output alarm upper limit value;
s8, acquiring the transmission speed v of the strip steel in real timet+1And rapidly controlling the trigger velocity VkAnd VtComparing: if v ist+1≤VkAnd v ist+1<VtThen, the control is switched to S10 for fast speed reduction control; otherwise, executing S9 normal control;
s9, conventional fluctuation control: 1) vt+1→Vt(ii) a 2) Computing
3) Inquiring a database according to the R value to obtain an oil output correction value kRAccording to C x vtGrouping values, inquiring a database to obtain a conventional fluctuation oiling control correction coefficient kcv1(ii) a 4) Calculating R' ═ R.kR·kcv1(ii) a 5) Turning to S6;
s10, fast speed reduction control: 1) vt+1→Vt(ii) a 2) Computing
3) Inquiring a database according to the R value to obtain an oil output correction value kRAccording to C x vtGrouping values, inquiring a database to obtain a conventional fluctuation oiling control correction coefficient kcv1And a rapid fluctuation correction coefficient kcv2(ii) a 4) Calculating R' ═ R.kR·kcv1·kcv2(ii) a 5) Go to S6.
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