CN117206340A - Threading control method for coiling furnace - Google Patents
Threading control method for coiling furnace Download PDFInfo
- Publication number
- CN117206340A CN117206340A CN202311214206.XA CN202311214206A CN117206340A CN 117206340 A CN117206340 A CN 117206340A CN 202311214206 A CN202311214206 A CN 202311214206A CN 117206340 A CN117206340 A CN 117206340A
- Authority
- CN
- China
- Prior art keywords
- rotary drum
- steel plate
- moving distance
- rotating speed
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 238000002788 crimping Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The application discloses a threading control method of a coiling furnace, which relates to the technical field of steel plate production and comprises the following steps: when the steel plate enters the crimping furnace and the head of the steel plate stretches into the clamping groove of the crimping furnace rotary drum, the rotary drum is controlled to start rotating; and PI feedback control is adopted, a control target is set to be that the difference value between the moving distance of the steel plate head and the moving distance of the clamping groove of the rotary drum is equal to a set value, and a controlled object is set to be the rotating speed of the rotary drum. The application adopts PI feedback control to regulate the rotating speed of the rotary drum, realizes quick and stable tension control, effectively reduces the amount of an unintended steel plate with head and tail surface quality problems caused by rolling, reduces the large impact force generated by threading, effectively prolongs the service life of equipment such as the rotary drum, and reduces the risk of tearing the head of the steel plate.
Description
Technical Field
The application relates to the technical field of steel plate production, in particular to a threading control method of a coiling furnace.
Background
The current control process for threading the coiling furnace at home and abroad comprises the following steps: 1. positioning a coiling furnace drum; 2. the steel plate enters a coiling furnace drum at the speed of biting steel by a rolling mill; 3. after detecting that the steel plate enters the coiling furnace for a certain length, the main motor of the coiling furnace starts rotating at a fixed speed as soon as possible until the tension of the steel plate is established, and the speed of the main motor of the coiling furnace is passively reduced to be basically the same as the speed of the steel plate.
According to the control of the mode, when the tension of the steel plate is established, the rotary drum is provided with a large impact force, the whole equipment of the main motor is damaged to a certain extent, the surface of the steel plate is extremely easy to scratch or press in foreign matters, and the quality problem of the head and tail surfaces of the steel plate is generated.
Disclosure of Invention
The application aims to solve the technical problem of overcoming the defects of the prior art and providing a threading control method of a coiling furnace.
In order to solve the technical problems, the technical scheme of the application is as follows:
a coiling furnace threading control method comprises the following steps:
when the steel plate enters the crimping furnace and the head of the steel plate stretches into the clamping groove of the crimping furnace rotary drum, the rotary drum is controlled to start rotating;
and (3) adopting position feedback control, setting a control target to be that the difference value between the moving distance of the head part of the steel plate and the moving distance of the clamping groove of the rotary drum is equal to a set value, and setting a controlled object to be the rotating speed of the rotary drum.
As a preferable scheme of the coiler furnace threading control method, the coiler furnace threading control method comprises the following steps: the setting control targets are that the difference value between the moving distance of the head of the steel plate and the moving distance of the clamping groove of the rotary drum is equal to a set value, and the setting of the controlled object is the rotating speed of the rotary drum comprises the following steps:
acquiring a moving distance S1 from the start of the rotary drum to the head of the steel plate at the current time and a moving distance S2 of a clamping groove of the rotary drum in real time;
obtaining a difference value between the moving distance S1 of the head of the steel plate and the moving distance S2 of the clamping groove of the rotary drum;
and adjusting the rotating speed of the rotary drum in real time based on the difference value.
As a preferable scheme of the coiler furnace threading control method, the coiler furnace threading control method comprises the following steps: the rotating speed N of the rotating drum is equal to the sum of the initial set rotating speed N1 and the rotating speed added value N2 of the rotating drum;
the rotating speed of the rotary drum is adjusted in real time based on the difference value, and the rotating speed comprises:
and adjusting the rotating speed added value n2 in real time based on the difference value.
As a preferable scheme of the coiler furnace threading control method, the coiler furnace threading control method comprises the following steps: and under the initial set speed of the rotary drum, the linear speed of the clamping groove of the rotary drum is equal to the moving speed of the steel plate.
As a preferable scheme of the coiler furnace threading control method, the coiler furnace threading control method comprises the following steps: after PI feedback control is adopted, setting the control target that the difference between the moving distance of the steel plate head and the moving distance of the rotary drum clamping groove is equal to a set value, and setting the controlled object as the rotating speed of the rotary drum, the method further comprises the following steps:
after the tension is established between the steel plate and the drum, the position feedback control is stopped.
The beneficial effects of the application are as follows:
the application adopts PI feedback control to regulate the rotating speed of the rotary drum, realizes quick and stable tension control, effectively reduces the amount of an unintended steel plate with head and tail surface quality problems caused by rolling, reduces the large impact force generated by threading, effectively prolongs the service life of equipment such as the rotary drum, and reduces the risk of tearing the head of the steel plate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a threading control method of a coiler furnace.
Detailed Description
In order that the application may be more readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Fig. 1 is a schematic flow chart of a threading control method for a coiler furnace according to an embodiment of the present application. The method comprises the following steps of S101-S103, wherein the specific steps are as follows:
step S101: when the steel plate enters the crimping furnace and the head of the steel plate stretches into the clamping groove of the crimping furnace rotary drum, the rotary drum is controlled to start rotating.
Step S102: and (3) adopting position feedback control, setting a control target to be that the difference value between the moving distance of the head part of the steel plate and the moving distance of the clamping groove of the rotary drum is equal to a set value, and setting a controlled object to be the rotating speed of the rotary drum.
Specifically, after the drum of the coiling furnace is started, the moving path of the drum clamping groove is paved to a horizontal plane, and the drum clamping groove and the head of the steel plate can be regarded as moving in the same direction. The rotating speed is lower when the rotary drum is started, so that the moving speed of the steel plate is larger than that of the rotary drum clamping groove. At this time, the drum clamping groove needs to exceed the head of the steel plate by a certain distance to establish tension.
Thus, the present step specifically comprises the steps of:
step S102a: and acquiring the moving distance S1 from the start of the drum to the current time of the head of the steel plate and the moving distance S2 of the clamping groove of the drum in real time.
Step S102b: the difference between the moving distance S1 of the head of the steel plate and the moving distance S2 of the clamping groove of the rotary drum is obtained.
Step S102c: and adjusting the rotating speed of the rotary drum in real time based on the difference value.
The rotation speed N of the drum is equal to the sum of the initial set rotation speed N1 and the rotation speed added value N2 of the drum. Therefore, the rotating speed of the real-time rotary drum based on the difference value is: and adjusting the rotating speed added value n2 in real time based on the difference value.
At the initial set speed of the rotary drum, the linear speed of the clamping groove of the rotary drum is equal to the moving speed of the steel plate.
It can be understood that, since the PI feedback control is set to set the difference between the moving distance of the steel plate head and the moving distance of the drum clamping groove to be equal to the set value, when the difference between the moving distance of the drum clamping groove and the moving distance of the steel plate head is large, the rotating speed added value n2 is large, so that the time for establishing the tension can be reduced. However, when the difference between the moving distance of the clamping groove of the rotary drum and the moving distance of the head of the steel plate is smaller, namely the tension is about to be built, the rotating speed of the main motor of the coiling furnace is actively reduced, and the rotating speed of the rotary drum is reduced, so that the impact force of the steel plate on the rotary drum is reduced.
Step S103: after the tension is established between the steel plate and the drum, the position feedback control is stopped.
Specifically, after the tension is established between the steel plate and the rotary drum, the linear speed of the clamping groove of the rotary drum is equal to the moving speed of the steel plate at the initial set speed of the rotary drum, so that the normal coiling of the steel plate can be ensured without adjusting the speed of the rotary drum after the tension is established. If PI feedback control is continuously adopted, a difference value may be generated between the linear speed of the drum clamping groove and the moving speed of the steel plate, and normal coiling of the steel plate may be affected.
In addition, the rolling mill bite speed cannot be too low due to the limitations of the rolling mill oil film bearings on the rolling mill bite speed. However, in order to reduce the time for establishing tension, the rolling speed can be properly reduced before the steel plate enters the coiling furnace, so that the stable and rapid tension establishment control is realized.
After the method is adopted, the length of each rolling plate can be reduced by 6 meters, the average rolling plate can be reduced by 1 ton of unplanned quantity, and 20000 tons of unplanned quantity can be reduced each year. The equipment failure time is reduced by 5 hours every year, the equipment loss is reduced by 20 ten thousand per year, the output per hour is 200 tons, and the steel benefit per ton is calculated by 500 yuan: 20000×500+5×200×500+200000=1070 ten thousand yuan.
Therefore, the technical scheme of the application adopts PI feedback control to regulate the rotating speed of the rotary drum, thereby realizing quick and stable tension control establishment, effectively reducing the amount of an unintended steel plate with head-tail surface quality problem caused by rolling, reducing the large impact force generated by threading, effectively prolonging the service lives of equipment such as the rotary drum, and reducing the risk of tearing the head of the steel plate.
In addition to the above embodiments, the present application may have other embodiments; all technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the application.
Claims (5)
1. A coiling furnace threading control method is characterized in that: comprising the following steps:
when the steel plate enters the crimping furnace and the head of the steel plate stretches into the clamping groove of the crimping furnace rotary drum, the rotary drum is controlled to start rotating;
and (3) adopting position feedback control, setting a control target to be that the difference value between the moving distance of the head part of the steel plate and the moving distance of the clamping groove of the rotary drum is equal to a set value, and setting a controlled object to be the rotating speed of the rotary drum.
2. The coiler furnace threading control method according to claim 1, characterized in that: the setting control targets are that the difference value between the moving distance of the head of the steel plate and the moving distance of the clamping groove of the rotary drum is equal to a set value, and the setting of the controlled object is the rotating speed of the rotary drum comprises the following steps:
acquiring a moving distance S1 from the start of the rotary drum to the head of the steel plate at the current time and a moving distance S2 of a clamping groove of the rotary drum in real time;
obtaining a difference value between the moving distance S1 of the head of the steel plate and the moving distance S2 of the clamping groove of the rotary drum;
and adjusting the rotating speed of the rotary drum in real time based on the difference value.
3. The coiler furnace threading control method according to claim 2, characterized in that: the rotating speed N of the rotating drum is equal to the sum of the initial set rotating speed N1 and the rotating speed added value N2 of the rotating drum;
the rotating speed of the rotary drum is adjusted in real time based on the difference value, and the rotating speed comprises:
and adjusting the rotating speed added value n2 in real time based on the difference value.
4. A coiling furnace threading control method as in claim 3 and characterized in that: and under the initial set speed of the rotary drum, the linear speed of the clamping groove of the rotary drum is equal to the moving speed of the steel plate.
5. The coiler furnace threading control method according to claim 1, characterized in that: after PI feedback control is adopted, setting the control target that the difference between the moving distance of the steel plate head and the moving distance of the rotary drum clamping groove is equal to a set value, and setting the controlled object as the rotating speed of the rotary drum, the method further comprises the following steps:
after the tension is established between the steel plate and the drum, the position feedback control is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311214206.XA CN117206340A (en) | 2023-09-20 | 2023-09-20 | Threading control method for coiling furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311214206.XA CN117206340A (en) | 2023-09-20 | 2023-09-20 | Threading control method for coiling furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117206340A true CN117206340A (en) | 2023-12-12 |
Family
ID=89047839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311214206.XA Pending CN117206340A (en) | 2023-09-20 | 2023-09-20 | Threading control method for coiling furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117206340A (en) |
-
2023
- 2023-09-20 CN CN202311214206.XA patent/CN117206340A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101376140B (en) | Method for correcting error of middle blank for pass-reversible rolling | |
| CN117206340A (en) | Threading control method for coiling furnace | |
| JP5474059B2 (en) | Method for changing rolls in a rolling mill for continuously running steel strips | |
| CN111187894B (en) | Method for determining steel charging time and preventing hot-fed steel billet from damaging stokehole equipment | |
| EP1819456A1 (en) | Method and mill train for improving the slipping out of a metal rolled strip whose rolled strip end runs out at a rolling speed | |
| CN112756403B (en) | Strip steel deviation rectifying system and method | |
| CN110202009B (en) | Rolling mill start thickness control method and device | |
| CN108994090B (en) | Method for diagnosing faults of rolling mill pressing system | |
| CN109365543B (en) | Control system and method for hot rolling rough rolling final stand rolling mill in fault state | |
| EP2556903B1 (en) | Operation control method of tandem rolling mill, and method for producing hot-rolled steel sheet using same | |
| CN110449470B (en) | Loop carrier roller mounting seat and method for controlling deviation of strip steel at loop outlet by applying same | |
| CN106694566A (en) | Steel-sticking edging control method for edging mill | |
| CN114660075A (en) | Tension paying-off monitoring method and system | |
| CN111495969B (en) | Online adjustment monitoring system for line pressure of rolling machine | |
| CN109226270B (en) | Emergency disposal method for steel clamping of wide and thick plate rolling mill | |
| CN109420681A (en) | A method of cold continuous rolling process rolling stability is improved by thickness monitoring | |
| CN113020285A (en) | Loop variable gain control method and device | |
| KR101800317B1 (en) | Correction apparatus for rolled coil | |
| CN114345984B (en) | Method and device capable of automatically adjusting inclination angle of side guide plate of coiling machine | |
| CN218361409U (en) | From correcting deviation bearing roller device | |
| CN109550789B (en) | Method for running-in of screw and nut under pressing of heavy and medium plate mill | |
| CN212402352U (en) | Improved carbon block conveying transition roller | |
| CN113578975B (en) | Method for rapidly changing specifications of acid rolling mill | |
| CN110369517B (en) | Method for controlling scratch of tension roller in slipping | |
| CN110340151B (en) | Method and system for determining and controlling roll bending force of roll changing of 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 |