CN114713637B - Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling - Google Patents
Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling Download PDFInfo
- Publication number
- CN114713637B CN114713637B CN202210324217.2A CN202210324217A CN114713637B CN 114713637 B CN114713637 B CN 114713637B CN 202210324217 A CN202210324217 A CN 202210324217A CN 114713637 B CN114713637 B CN 114713637B
- Authority
- CN
- China
- Prior art keywords
- speed
- motor
- roller
- impact
- calculating
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005096 rolling process Methods 0.000 title claims abstract description 33
- 238000004364 calculation method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005098 hot rolling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/04—Manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a method for calculating and compensating impact speed drop compensation coefficients of hot continuous rolling, which comprises the following steps: and calculating to obtain an impact speed drop compensation coefficient according to the advance speed coefficient, the motor power, the motor time constant, the roller rotating angular speed and the motor rotating inertia. The impact speed drop compensation method for the hot continuous rolling comprises the following steps: calculating to obtain the rotating speed of the motor; calculating to obtain the rotation angular speed of the roller according to the rotation speed of the motor; calculating by using an impact speed drop compensation coefficient calculation method to obtain an impact speed drop compensation coefficient; carrying out amplitude limiting processing on the impact speed reduction compensation coefficient; and calculating to obtain the compensated roller linear speed by utilizing the impact speed drop compensation coefficient and the roller linear speed before the strip steel impacts. The hot continuous rolling impact speed drop compensation method effectively compensates the impact speed drop generated when the hot continuous rolling unit penetrates through the strip and bites the steel, avoids the strip steel thickness exceeding caused by the impact speed drop, ensures the hot rolling product quality, and has high accuracy of the compensated roller linear speed and good compensation effect of the roller linear speed.
Description
Technical Field
The invention relates to the technical field of metallurgical machinery, automation and rolling, in particular to a calculation method and a compensation method for an impact speed reduction compensation coefficient of hot continuous rolling.
Background
In the process of hot continuous rolling of strip steel, the impact speed of a rolling mill can drop when the rolling mill bites the steel, namely the speed of the rolling mill can drop suddenly under the impact of the strip steel, so that the speed fluctuation of the rolling mill and the thickness of the head of the strip steel exceed the standard, and the steel dragging phenomenon can occur at the moment of biting the steel in serious cases. An effective solution to this problem is to take compensation measures, i.e. to add a certain compensation value to the mill speed setting before the rolled piece bites, and to withdraw the additional compensation value after the mill bites. The accuracy of the speed compensation value of the rolling mill of the existing compensation method is not high, and the effect is not good due to too much or too little compensation.
Disclosure of Invention
The invention provides a hot continuous rolling impact speed drop compensation method, and the existing compensation method has the following problems that the accuracy of a rolling mill speed compensation value is not high.
To solve the above technical problem, the embodiments of the present invention provide the following solutions:
on one hand, the embodiment of the invention provides a method for calculating an impact speed reduction compensation coefficient of hot continuous rolling, which comprises the following steps:
calculating according to the advance speed coefficient, the motor power, the motor time constant, the roller rotating angular speed and the motor rotating inertia to obtain an impact speed reduction compensation coefficient, wherein the impact speed reduction compensation coefficient function is as follows:
wherein, d rp A speed drop compensation coefficient; v. of r Is the roller rotation angular velocity, rad/s; f. of lead Is a leading velocity coefficient; p is motor power, kW; d T Is the motor time constant, s; omega K Is the rotational inertia of the motor, kg.m 2 。
On the other hand, an embodiment of the present invention provides a hot continuous rolling impact speed reduction compensation method, where the method includes the following steps:
calculating to obtain the rotating speed of the motor;
calculating to obtain the rotation angular speed of the roller according to the rotation speed of the motor;
calculating by using an impact speed drop compensation coefficient calculation method to obtain an impact speed drop compensation coefficient;
carrying out amplitude limiting processing on the impact speed drop compensation coefficient;
and calculating to obtain the compensated roller linear speed by using the impact speed drop compensation coefficient and the roller linear speed before the strip steel impacts.
Preferably, in the process of obtaining the motor rotation speed by calculation, the motor rotation speed is obtained by calculation by using the linear speed of the roller before the strip steel impacts, the conversion coefficient from the linear speed to the rotation speed, the gear box transmission ratio from the motor to the roller and the diameter of the roller, and the motor rotation speed function is as follows:
wherein n is the rotating speed of the motor and r/min; v. of 0 The linear speed of a roller before the strip steel is impacted is m/s; c. C ln The conversion coefficient from linear speed to rotating speed; c. C g The transmission ratio of a gear box between a motor and a roller is set; d is the diameter of the roller, mm.
Preferably, in the process of calculating the roll rotation angular velocity according to the motor rotation speed, the roll rotation angular velocity function is as follows:
wherein v is r Is the angular speed of rotation of the roll, rad/s.
Preferably, the impact speed drop compensation coefficient d is subjected to amplitude limiting processing in the process of carrying out amplitude limiting processing on the impact speed drop compensation coefficient rp At a set maximum value d max And a minimum value d min Within the range, if the value d is calculated rp If d exceeds the range, the maximum value is selected according to the rule of proximity, i.e., if d is rp >d max Then get d rp ＝d max (ii) a If d is rp <d min Then get d rp ＝d min 。
Preferably, in the process of calculating the compensated roll linear velocity by using the impact speed drop compensation coefficient and the roll linear velocity before strip steel impact, the compensated roll linear velocity function is as follows:
v 1 ＝v 0 (1+d rp )
wherein v is 1 To compensate for the roll linear velocity.
The scheme of the invention at least comprises the following beneficial effects:
in the scheme, the accuracy of the speed reduction compensation coefficient obtained by the method for calculating the impact speed reduction compensation coefficient of the hot continuous rolling is high; the hot continuous rolling impact speed drop compensation method effectively compensates the impact speed drop generated when the hot continuous rolling unit penetrates through the strip and bites the steel, avoids the strip steel thickness exceeding caused by the impact speed drop, ensures the hot rolling product quality, and has high accuracy of the compensated roll linear speed and good compensation effect of the roll linear speed.
Drawings
Fig. 1 is a flowchart of a hot continuous rolling impact speed drop compensation method according to a second embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
The embodiment provides a method for calculating an impact speed reduction compensation coefficient of hot continuous rolling, which comprises the following steps:
calculating according to the advance speed coefficient, the motor power, the motor time constant, the roller rotating angular speed and the motor rotating inertia to obtain an impact speed reduction compensation coefficient, wherein the impact speed reduction compensation coefficient function is as follows:
wherein, d rp A speed drop compensation coefficient; v. of r Is the roller rotation angular velocity, rad/s; f. of lead Is a lead speed coefficient; p is motor power, kW; d T Is the motor time constant, s; omega K Is the rotational inertia of the motor, kg.m 2 。
The calculation method for the hot continuous rolling impact rapid-reduction compensation coefficient has high accuracy of the rapid-reduction compensation coefficient;
example two
As shown in fig. 1, the present embodiment provides a method for compensating for a reduction in impact speed of hot continuous rolling, where the method uses a method for calculating a compensation coefficient for a reduction in impact speed of hot continuous rolling according to the first embodiment, and includes:
s100, calculating to obtain the rotating speed of the motor; in the process of obtaining the rotating speed of the motor by calculation, the rotating speed of the motor is obtained by utilizing the linear speed of the roller before the strip steel impacts, the conversion coefficient from the linear speed to the rotating speed, the transmission ratio of the gear box between the motor and the roller and the diameter of the roller, and the function of the rotating speed of the motor is as follows:
wherein n is the rotating speed of the motor and r/min; v. of 0 The linear speed of a roller before the strip steel is impacted is m/s; c. C ln The conversion coefficient from linear speed to rotating speed; c. C g The transmission ratio of a gear box between a motor and a roller is set; d is the diameter of the roller, mm.
S200, calculating to obtain the rotating angular speed of the roller according to the rotating speed of the motor; in the process of calculating and obtaining the roller rotation angular speed according to the motor rotation speed, the roller rotation angular speed function is as follows:
wherein v is r Is the roll rotational angular velocity, rad/s.
S300, calculating by using an impact speed drop compensation coefficient calculation method to obtain an impact speed drop compensation coefficient; calculating to obtain an impact speed drop compensation coefficient by using the impact speed drop compensation coefficient calculation method in the embodiment;
s400, carrying out amplitude limiting processing on the impact speed reduction compensation coefficient; in the process of amplitude limiting the impact speed reduction compensation coefficient, the impact speed reduction compensation coefficient d rp At a set maximum value d max And a minimum value d min Within the range, if the value d is calculated rp If d exceeds the range, the maximum value is selected according to the rule of proximity, i.e., if d is rp >d max Then get d rp ＝d max (ii) a If d is rp <d min Then get d rp ＝d min 。
And S500, calculating to obtain the compensated roller linear speed by utilizing the impact speed drop compensation coefficient and the roller linear speed before the strip steel impacts. In the process of calculating and obtaining the compensated roll linear velocity by utilizing the impact speed drop compensation coefficient and the roll linear velocity before strip steel impact, the compensated roll linear velocity function is as follows:
v 1 ＝v 0 (1+d rp )
wherein v is 1 To compensate for the roll linear velocity.
The hot continuous rolling impact speed drop compensation method effectively compensates impact speed drop generated when the hot continuous rolling unit penetrates through the strip and bites steel, avoids strip steel thickness exceeding caused by impact speed drop, ensures hot rolling product quality, and has high accuracy of compensated roll linear speed and good compensation effect of the roll linear speed.
EXAMPLE III
Aiming at the problem of impact speed drop of a finishing mill group in a hot continuous rolling production line of a certain factory, an impact compensation coefficient d of a last stand F7 is calculated rp . Firstly, according to field equipment and process setting data, the following parameters of a finishing mill F7 frame are determined: linear velocity v of roller before impact 0 =10.46m/s; gear box drive ratio c g =1; linear velocity to rotational speed conversion factor c ln =19098.7917, roll diameter D =665mm.
The linear velocity of the roller before impact, the conversion coefficient from the linear velocity to the rotating speed, the transmission ratio of the gear box and the diameter of the roller are brought into a motor rotating speed function,
calculating to obtain the rotating speed n =300.4 r/min of the motor;
the motor speed is brought into the function of the roll rotation angular speed,
v is obtained by calculation r ＝31.5rad/s。
Then the roller is rotated at an angular velocity v r =31.5m/s, advance speed coefficient f lead =0.016, motor moment of inertia omega K ω K ＝10320kg·m 2 Motor power p =4911kW, motor time constant d T =0.125s is brought into the impact speed drop compensation coefficient function,
d is obtained by calculation rp ＝9.4×10- 3 9.4×10- 3 ；
Model sets d rp Respectively is d max ＝0.1，d min And (5) = -0.01. From this, d is calculated rp ∈[-0.01,0.1]Then get d rp ＝9.4×10 -3 9.4×10 -3 Compensating the impact speed drop coefficient according to a formula
v 1 ＝v 0 (1+d rp )
Calculating the compensated roll linear velocity v 1 ＝10.56m/s。
The model calculation value is applied to online production, the speed fluctuation of the roller during steel biting is obviously reduced, and the rolling stability and the head thickness quality of the strip steel are ensured.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (2)
1. A hot continuous rolling impact speed reduction compensation method is characterized in that a hot continuous rolling impact speed reduction compensation coefficient calculation method is utilized, and the calculation method comprises the following steps:
calculating according to the advance speed coefficient, the motor power, the motor time constant, the roller rotating angular speed and the motor rotating inertia to obtain an impact speed reduction compensation coefficient, wherein the impact speed reduction compensation coefficient function is as follows:
wherein d is rp The impact speed drop compensation coefficient; v. of r Is the roller rotation angular velocity, rad/s; f. of lead Is a lead speed coefficient; p is motor power, kW; d is a radical of T Is the motor time constant, s; omega K Is the rotational inertia of the motor, kg.m 2 ；
Calculating to obtain the rotating speed of the motor;
calculating to obtain the rotation angular speed of the roller according to the rotation speed of the motor;
calculating by using an impact speed drop compensation coefficient calculation method to obtain an impact speed drop compensation coefficient;
carrying out amplitude limiting processing on the impact speed drop compensation coefficient;
calculating to obtain the compensated roller linear velocity by utilizing the impact speed drop compensation coefficient and the roller linear velocity before the strip steel impacts;
in the process of obtaining the rotating speed of the motor through calculation, the rotating speed of the motor is obtained through calculation by utilizing the linear speed of the roller before the strip steel is impacted, the conversion coefficient from the linear speed to the rotating speed, the transmission ratio of the gear box between the motor and the roller and the diameter of the roller, and the function of the rotating speed of the motor is as follows:
wherein n is the rotating speed of the motor and r/min; v. of 0 The linear speed of a roller before the strip steel is impacted is m/s; c. C ln The conversion coefficient from linear speed to rotating speed; c. C g The transmission ratio of a gear box between a motor and a roller is set; d is the diameter of the roller, mm;
wherein, in the process of calculating the roller rotation angular speed according to the motor rotating speed, the roller rotation angular speed function is as follows:
wherein v is r Is the roller rotation angular velocity, rad/s;
wherein, in the process of calculating and obtaining the compensated roller linear speed by utilizing the impact speed drop compensation coefficient and the roller linear speed before strip steel impact, the function of the compensated roller linear speed is as follows:
v 1 ＝v 0 (1+d rp )
wherein v is 1 To compensate for the roll linear velocity.
2. The hot continuous rolling impact speed reduction compensation method according to claim 1, wherein the impact speed reduction compensation coefficient d is subjected to amplitude limiting processing during the impact speed reduction compensation coefficient rp At a set maximum value d max And a minimum value d min Within the range, if d rp If d exceeds the range, the maximum value is selected according to the principle of closeness, i.e., if d rp >d max Then get d rp ＝d max (ii) a If d is rp <d min Then get d rp ＝d min 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210324217.2A CN114713637B (en) | 2022-03-28 | 2022-03-28 | Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210324217.2A CN114713637B (en) | 2022-03-28 | 2022-03-28 | Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114713637A CN114713637A (en) | 2022-07-08 |
| CN114713637B true CN114713637B (en) | 2023-01-06 |
Family
ID=82239535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210324217.2A Active CN114713637B (en) | 2022-03-28 | 2022-03-28 | Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114713637B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108988A (en) * | 1981-11-18 | 1983-06-29 | ゼネラル・エレクトリツク・カンパニイ | Speed compensating method and device by abrupt load variation of metal rolling mill |
| JPH0970609A (en) * | 1995-09-06 | 1997-03-18 | Kobe Steel Ltd | Method and device for controlling compensation of rolling speed in continuous hot rolling mill |
| CN111069307A (en) * | 2019-12-09 | 2020-04-28 | 北京科技大学 | Medium plate intermediate cooling method suitable for multiple processes |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6099416A (en) * | 1983-11-04 | 1985-06-03 | Mitsubishi Electric Corp | Speed control device of rolling mill |
| JPH03258408A (en) * | 1990-03-09 | 1991-11-18 | Nkk Corp | Method and device for controlling impact drop compensation of mandrel mill |
| JP2001150013A (en) * | 1999-11-25 | 2001-06-05 | Daido Steel Co Ltd | Method of compensation for impact drop on continuous rolling equipment |
| KR20020047750A (en) * | 2000-12-14 | 2002-06-22 | 이구택 | Impact drop compensation apparatus of mill and its compensation method |
| CN104874613B (en) * | 2015-05-27 | 2016-11-23 | 武汉科技大学 | Compensated the method realizing second flow balance between hot continuous rolling frame by rolling mill speed |
| CN106424155B (en) * | 2016-09-30 | 2018-03-30 | 安徽马钢自动化信息技术有限公司 | A kind of control method of tandem mill impact compensation |
-
2022
- 2022-03-28 CN CN202210324217.2A patent/CN114713637B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108988A (en) * | 1981-11-18 | 1983-06-29 | ゼネラル・エレクトリツク・カンパニイ | Speed compensating method and device by abrupt load variation of metal rolling mill |
| JPH0970609A (en) * | 1995-09-06 | 1997-03-18 | Kobe Steel Ltd | Method and device for controlling compensation of rolling speed in continuous hot rolling mill |
| CN111069307A (en) * | 2019-12-09 | 2020-04-28 | 北京科技大学 | Medium plate intermediate cooling method suitable for multiple processes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114713637A (en) | 2022-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20100072329A (en) | Strip rolling mill and its control method | |
| JPS59144384A (en) | Control system of tube mill drive motor | |
| US4506197A (en) | Method of controlling mill motors speeds in a cold tandem mill | |
| CN114713637B (en) | Calculation method and compensation method for impact speed reduction compensation coefficient of hot continuous rolling | |
| CN110064662B (en) | Control method for preventing S roller of single-rack cold-rolled strip steel temper mill from slipping | |
| CN112129447A (en) | Tension-straightening tension measuring device, system and method for strip cleaning tension-straightening unit | |
| JP7131532B2 (en) | Winding control device, coiler, winding control method, and method for manufacturing hot-rolled metal strip | |
| JP2006095592A (en) | Extension rate control method in temper rolling mill | |
| JP3771734B2 (en) | High-precision winding method for rolled steel strip | |
| SU1124883A3 (en) | Arrangement for controlling geometrical dimensions of rolled product on continuous rolling mill | |
| KR101714917B1 (en) | Tension control apparatus | |
| JPS6149722A (en) | Plate thickness controlling method of steel strip | |
| JP3292618B2 (en) | Load estimator, load torque estimator, control device, and motor speed control device | |
| JP3101446B2 (en) | Plate tension control device in alloying furnace | |
| JPS5915722B2 (en) | Method and device for controlling the shape and crown near the plate edge in flat plate rolling | |
| JP3067985B2 (en) | Method for setting gap of backup roll rolling bearing of rolling mill | |
| JPS60121B2 (en) | Rolling method and equipment | |
| JPS63171258A (en) | Method and device for controlling casting velocity in continuous casting equipment | |
| CN110008601A (en) | Hot rolling AGC system based on product quality comprehensive coordination control | |
| RU2028844C1 (en) | Roller aggregate adjustment method | |
| JPS6240097B2 (en) | ||
| JP3067984B2 (en) | Continuous high-speed rolling method | |
| CN117415163A (en) | Control method and related equipment for plate type roller of leveling machine | |
| JP2002035808A (en) | Cross rolling mill and cross rolling method | |
| CN115254973A (en) | Composite material precision rolling mill |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240326 Address after: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee after: University OF SCIENCE AND TECHNOLOGY BEIJING Country or region after: China Patentee after: HANDAN IRON & STEEL GROUP Co.,Ltd. Address before: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee before: University OF SCIENCE AND TECHNOLOGY BEIJING Country or region before: China |
|
| TR01 | Transfer of patent right |