CN114535356B - Hot rolling coiling machine valve control method - Google Patents
Hot rolling coiling machine valve control method Download PDFInfo
- Publication number
- CN114535356B CN114535356B CN202210355141.XA CN202210355141A CN114535356B CN 114535356 B CN114535356 B CN 114535356B CN 202210355141 A CN202210355141 A CN 202210355141A CN 114535356 B CN114535356 B CN 114535356B
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- China
- Prior art keywords
- pinch roll
- valve
- strip steel
- head
- coiling machine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention discloses a hot rolling coiling machine valve control method, which comprises the following steps: when the thickness of the strip steel is more than or equal to 5mm, the valve is opened to a waiting position recorded in the standard process, and when the head of the strip steel is 25m away from the pinch roll, the valve is subjected to pressure control to touch the pinch roll to collect a value, and then is lowered by 2mm to be changed into position control; when the thickness of the strip steel is less than 5mm, the valve is opened to a waiting position recorded in the standard process, when the head of the strip steel is 25m away from the pinch roll, the valve is subjected to pressure control to touch the pinch roll, the head of the strip steel is snapped by the pinch roll and is safely fed into the coiling machine, and the valve descends for 3mm at the moment to be changed into position control; the method avoids the steel passing accident that the head of the strip steel passes through the gap between the upper pinch roll and the valve and cannot be normally fed into the coiling machine by the pinch roll, reduces the touch damage of the valve to the roll surface of the upper pinch roll, protects the uniform continuity of the oxide film on the roll surface, reduces the wax hanging tendency and improves the service cycle of the pinch roll.
Description
Technical Field
The invention belongs to the technical field of hot rolling recoiling machines, and particularly relates to a hot rolling recoiling machine valve control method.
Background
At present, when the pinch roll is at a roll gap of 0, the pressure of the pinch roll when the pinch roll is lifted up and touches the upper pinch roll reaches a set pressure, the position sensor records that the open position-2 mm of the pinch roll is not touched to a waiting position, and the pinch roll is prevented from being damaged by the control, but the position of the pinch roll is at a distance of h-0.2mm from the upper pinch roll (the set roll gap of the pinch roll) +2mm from the upper pinch roll, so that the risk of steel penetration exists. As shown in figure 1, the position of the valve is controlled, and the head of the strip steel can possibly pass through a gap between the pinch roll and the valve to enter the catcher, so that the steel clamping accident is caused.
The pressure of the valve is controlled, and a certain pressure is given to the valve to keep the valve in touch with the pinch roll all the time, so that the risk of steel penetration can be avoided, the roll surface of the pinch roll is damaged, the uniformity and the continuity of an oxide film are damaged, and the service cycle of the pinch roll is shortened. As shown in FIG. 2, the pressure of the valve is controlled, the valve can damage the surface of the pinch roll, the wax-hanging tendency of the pinch roll is increased, periodic roll marks and scratches on the surface of strip steel appear, and the service cycle of the pinch roll is reduced.
Disclosure of Invention
The invention aims to provide a hot rolling coiler valve control method.
The technical scheme adopted for solving the technical problems is as follows: a hot rolling coiler valve control method comprises the following steps:
1) When the thickness of the strip steel is more than or equal to 5mm, the valve is opened to a waiting position recorded in the standard process, and when the head of the strip steel is 25m away from the pinch roll, the valve is subjected to pressure control to touch the pinch roll to collect a value, and then is lowered by 2mm to be changed into position control;
2) When the thickness of the strip steel is less than 5mm, the valve is opened to a waiting position recorded in the standard process, when the head of the strip steel is 25m away from the pinch roll, the valve is in pressure control contact with the pinch roll, the head of the strip steel is bitten into the safety feeding coiling machine by the pinch roll, and the valve descends for 3mm at the moment to be changed into position control.
The invention has the beneficial effects that: the method avoids the steel passing accident that the head of the strip steel passes through the gap between the upper pinch roll and the valve and cannot be normally fed into the coiling machine by the pinch roll, reduces the touch damage of the valve to the roll surface of the upper pinch roll, protects the uniform continuity of the oxide film on the roll surface, reduces the wax hanging tendency and improves the service cycle of the pinch roll.
Drawings
Fig. 1 is a schematic diagram (one) of a prior art structure.
Fig. 2 is a schematic diagram of a structure of the prior art (ii).
Fig. 3 is a schematic structural diagram (one) of the present invention.
Fig. 4 is a schematic structural diagram (ii) of the present invention.
In the figure: 1-strip steel; 2-upper pinch rolls; 3-a shutter; 4-a strip steel catcher.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 3-4, a hot rolling coiler shutter control method comprises the following steps:
as shown in figure 3, when the thickness of the strip steel is more than or equal to 5mm, the valve is opened to a waiting position recorded in the standard time, when the head of the strip steel is 25m away from the pinch roll through tracking calculation, the valve enters pressure control, the pinch roll is lifted up to reach set pressure (the pressure value is set by determining that the touch is as minimum as possible), at the moment, the value of the position of the lifting touch, namely-2 mm, is not touched on the pinch roll, and the valve is closed to a zero position after the tail of the strip steel leaves the pinch roll.
When the head of the strip steel 1 is separated from the upper pinch roll 2 by 25m, the valve 3 performs small pressure touch on the upper pinch roll 2 to collect values, and then the value is reduced by 2mm to change into position control.
As shown in figure 4, when the thickness of the strip steel 1 is less than 5mm, the valve 3 is opened to a waiting position recorded in a standard time, when the head of the strip steel 1 is tracked and calculated to be 25m away from the pinch roll, the valve enters pressure control, the pinch roll is lifted up to reach set pressure, according to statistics, due to high speed of thin specification, the small pressure control is kept until the head of the strip steel is bitten into a safe feeding coiling machine by the pinch roll, at the moment, the valve takes the effective position value of the pinch roll, namely-3 mm, and the valve does not touch the upper pinch roll any more until the tail leaves the pinch roll and then is closed to a zero position.
When the head of the strip steel 1 is separated from the upper pinch roll 2 by 25m, the small pressure control of the valve contacts the upper pinch roll 2, and the head of the strip steel 1 is bitten by the pinch roll to be safely fed into the coiling machine, and the valve 3 descends by 3mm to be changed into position control.
The invention realizes the control of the non-touching position of the small pressure touch from the ascending safe touch position calibrated by the zero position of the upper pinch roll 2 to the waiting position of-2 mm non-touching until the head of each strip steel 1 is 25m away from the pinch roll, then the small pressure touch position with the thickness of more than or equal to 5mm reaches the small pressure, the value is-2 mm non-touching position, the small pressure with the thickness of less than 5mm of the strip steel 1 is maintained at the position of-3 mm after the head of the strip steel 1 is bent by the upper pinch roll 2 and is safely sent into a coiling machine, and the position control is performed. Therefore, the steel passing accident of the strip steel is avoided, the roll surface of the pinch roll can be protected, the surface quality of the strip steel is improved, and the service cycle of the pinch roll and the valve plate is prolonged.
The invention adopts the double-mode control of the hot rolling coiling machine valve, ensures the small pressure safety touch position of the upper pinch roll 2 and the valve of each steel in any specification by utilizing the small pressure control, prevents the accident that the upper pinch roll 2 cannot bend the head of strip steel into the coiling machine and pass out into a catcher because of overlarge gaps, and can also perform the non-touch position control when waiting for coiling and head safety coiling, thereby avoiding steel passing and protecting the roll surface. When the distance between the head of the strip steel 1 and the position of the pinch roll is greater than 25m, the position of the pinch roll zero position valve is controlled by-2 mm when the head of the pinch roll is calibrated, the head of the pinch roll is positioned 25m away from the pinch roll, the effective collection of the safe touch position is ensured by adopting small pressure control, the pinch roll with the thickness of more than or equal to 5mm directly enters the effective collection value-2 mm position control, and the pinch rolls with the thickness of less than 5mm enter the effective collection value-3 mm position control after being safely bitten.
The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (1)
1. A hot rolling coiling machine valve control method is characterized by comprising the following steps:
1) When the thickness of the strip steel is more than or equal to 5mm, the valve is opened to a waiting position recorded in the standard process, and when the head of the strip steel is 25m away from the pinch roll, the valve is subjected to pressure control to touch the pinch roll to collect a value, and then is lowered by 2mm to be changed into position control;
2) When the thickness of the strip steel is less than 5mm, the valve is opened to a waiting position recorded in the standard process, when the head of the strip steel is 25m away from the pinch roll, the valve is in pressure control contact with the pinch roll, the head of the strip steel is bitten into the safety feeding coiling machine by the pinch roll, and the valve descends for 3mm at the moment to be changed into position control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355141.XA CN114535356B (en) | 2022-04-06 | 2022-04-06 | Hot rolling coiling machine valve control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355141.XA CN114535356B (en) | 2022-04-06 | 2022-04-06 | Hot rolling coiling machine valve control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114535356A CN114535356A (en) | 2022-05-27 |
| CN114535356B true CN114535356B (en) | 2023-08-22 |
Family
ID=81665043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210355141.XA Active CN114535356B (en) | 2022-04-06 | 2022-04-06 | Hot rolling coiling machine valve control method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09276931A (en) * | 1996-04-19 | 1997-10-28 | Mitsubishi Heavy Ind Ltd | Method for coiling hot rolled steel strip and device for coiling hot rolled steel strip |
| CN101890436A (en) * | 2010-08-19 | 2010-11-24 | 中冶赛迪工程技术股份有限公司 | Outlet valve device of strip-steel pinch roll and control method thereof |
| CN102581067A (en) * | 2011-01-06 | 2012-07-18 | 宝山钢铁股份有限公司 | Hot-rolled coiler pinch roll controlling method |
| CN107900110A (en) * | 2017-11-16 | 2018-04-13 | 马鞍山钢铁股份有限公司 | A kind of think gauge hot-strip batches control method |
| CN208261565U (en) * | 2018-05-22 | 2018-12-21 | 中冶赛迪技术研究中心有限公司 | Convenient for batching the belt pressing device of threading |
| CN111570530A (en) * | 2020-05-22 | 2020-08-25 | 东北大学 | Control method for pinch roll before fully-continuous hot-rolling thin strip coil |
-
2022
- 2022-04-06 CN CN202210355141.XA patent/CN114535356B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09276931A (en) * | 1996-04-19 | 1997-10-28 | Mitsubishi Heavy Ind Ltd | Method for coiling hot rolled steel strip and device for coiling hot rolled steel strip |
| CN101890436A (en) * | 2010-08-19 | 2010-11-24 | 中冶赛迪工程技术股份有限公司 | Outlet valve device of strip-steel pinch roll and control method thereof |
| CN102581067A (en) * | 2011-01-06 | 2012-07-18 | 宝山钢铁股份有限公司 | Hot-rolled coiler pinch roll controlling method |
| CN107900110A (en) * | 2017-11-16 | 2018-04-13 | 马鞍山钢铁股份有限公司 | A kind of think gauge hot-strip batches control method |
| CN208261565U (en) * | 2018-05-22 | 2018-12-21 | 中冶赛迪技术研究中心有限公司 | Convenient for batching the belt pressing device of threading |
| CN111570530A (en) * | 2020-05-22 | 2020-08-25 | 东北大学 | Control method for pinch roll before fully-continuous hot-rolling thin strip coil |
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| CN114535356A (en) | 2022-05-27 |
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