CN114618891A - Control method for solving block of area of slab sizing machine - Google Patents
Control method for solving block of area of slab sizing machine Download PDFInfo
- Publication number
- CN114618891A CN114618891A CN202210357563.0A CN202210357563A CN114618891A CN 114618891 A CN114618891 A CN 114618891A CN 202210357563 A CN202210357563 A CN 202210357563A CN 114618891 A CN114618891 A CN 114618891A
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- CN
- China
- Prior art keywords
- roll
- pinch roll
- control
- pressure
- pressure control
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/10—Arrangement or installation of feeding rollers in rolling stands
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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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a control method for solving the problem of blocking of a slab width fixing machine area, which comprises the following steps of: adjusting a control time sequence, when the pinch roll is switched to be under pressure control, firstly converting the pinch roll into 250KN pressure control, delaying for 2 seconds and then switching to be under 400KN pressure control; when the head of the strip blank reaches the pinch roll, if the pinch roll does not detect the pressure, the roll gap of the pinch roll is pressed down for 4mm for continuous detection, when the load pressure is detected to be 100KN, the L/R detection is triggered, and the roll table starting control is executed; the pressure control conversion delay of the guide roller is increased by 2 seconds for switching, and meanwhile, the load pressure is reduced by 200 KN; when the pinch roll is seriously abraded, the pinch roll is replaced in time, and gaskets are added on two sides and are 10-12 mm higher than other roll surfaces; the problems of waste steel in a fixed width machine area and the like caused by the influences of raw material warping, large thickness fluctuation, unclean surface, irregular head, low friction coefficient slippage and abrasion of a lower guide roll are solved, and the method plays a great promoting role in product development and control research of the hot-rolled strip steel.
Description
Technical Field
The invention belongs to the technical field of sizing machines, and particularly relates to a control method for solving the problem of blocking of a plate blank sizing machine area.
Background
At present, in the hot rolling production process, the phenomenon that a plate blank stops frequently occurs in a width fixing machine, continuous production interruption is caused, and the production efficiency is seriously restricted.
After long-time field tracking observation, the main reasons for the problems are found that the raw materials are warped, the thickness fluctuation is large, the surface is not clean, the head is irregular, the friction coefficient is low, the sliding is caused, and the abrasion of the lower guide roller is serious.
Therefore, to solve this problem, a control method is required.
Disclosure of Invention
The invention aims to provide a control method for solving the problem of blocking of a slab width fixing machine area.
The technical scheme adopted by the invention for solving the technical problems is as follows: a control method for solving the problem of blocking of the area of a slab sizing machine comprises the following steps:
1) adjusting a control time sequence, when the pinch roll is switched to be under pressure control, firstly converting the pressure control into 250KN pressure control, delaying for 2 seconds and then switching to be under 400KN pressure control;
2) when the head of the strip blank reaches the pinch roll, if the pinch roll does not detect the pressure, the roll gap of the pinch roll is pressed down for 4mm for continuous detection, when the load pressure is detected to be 100KN, the L/R detection is triggered, and the roll table starting control is executed;
3) the pressure control conversion delay of the guide roller is increased by 2 seconds for switching, and meanwhile, the load pressure is reduced by 200 KN;
4) when the pinch roll is seriously abraded, the pinch roll is replaced in time, and gaskets are added on two sides and are 10-12 mm higher than other roll surfaces.
The invention has the following beneficial effects: the control method solves the problems of generation of waste steel and beam blank in the area of the width fixing machine caused by the influences of head buckling of raw materials, large thickness fluctuation, unclean surface, irregular head, low friction coefficient slippage and abrasion of the lower guide roll, and plays a great role in promoting the product development and control research of the hot rolled strip steel.
Detailed Description
The present invention will now be described in further detail.
A control method for solving the problem of blocking of the area of a slab sizing machine comprises the following steps:
1) modifying pinch roll control timing and load pressure transitions
The current pinch roll control time sequence is as follows: after the plate blank is taken out of the furnace, data are issued through secondary presetting, and the roll gap of an upper pinch roll at an inlet (the plate blank thickness is 10mm), the roll gap of an upper guide roll at the inlet (the plate blank thickness is 40mm), the roll gap of the upper guide roll at an outlet (the plate blank thickness is 40mm), the roll gap of a lower pinch roll at the outlet (a roller way and the plate blank), the roll gap of the upper pinch roll at the outlet (the plate blank thickness is 40mm) and all the roll gaps are controlled in position before the sizing machine prepares for side pressure. And when the L/R of the inlet pinch roll is detected, switching to pressure control, and loading the pressure to 400 KN. And the successive time delay of the guide roll and the outlet pinch roll is respectively converted into pressure control. The control fails to consider the influences of raw material warping, large thickness fluctuation, unclean surface, irregular head, low friction coefficient slippage and lower guide roller abrasion, and the influences exist, and the control time sequence is changed by referring to the control time sequence and combining with field practice. Namely, when the pinch roll is switched to the pressure control, the pressure control is firstly converted into the pressure control with the pressure of 250KN, and then the pressure control is changed into the pressure control with the pressure of 400KN after 2 seconds of delay.
2) Development of secondary pressing function of pinch roll
In order to consider the fluctuation of the thickness of the plate blank, if the pinch roll does not detect the pressure when the head of the plate blank reaches the pinch roll, the roll gap of the pinch roll is secondarily pressed down for 4mm to continue the detection, and when the load pressure is detected to be 100KN, the L/R detection is triggered to execute the roller way starting control.
3) Modifying guide roller control time sequence and optimizing pressure configuration
The pressure control conversion delay of the guide roll is increased by 2 seconds for switching, and the pressure load is reduced by 200KN, because the guide roll is a driven roll, the transmission resistance of the pinch roll is increased if the load pressure is overlarge. And because the equipment is easily damaged due to the limitation of the upper guide roll equipment, and the anti-bulging effect of the guide roll is combined, the width reducing amount of different steel types with different widths is optimized, and the bulge is avoided.
4) The key equipment of the pinch roll and the guide roll is improved in maintenance, cooling and lubrication
According to the on-site tracking, the lower pinch roll at the inlet is seriously worn and is close to and level with the roller surface, the lower surface of a strip billet can not be completely contacted with the roller surface, the friction coefficient of the strip billet is reduced, meanwhile, the pinch roll is timely replaced, and the spacers with certain thicknesses are respectively added on the two sides, so that the thickness of the spacers is not less than 10mm-12mm higher than that of other roller surfaces, and the spacers can not be too large, and the head is prevented from raising up and climbing to impact the roller surface of the upper pinch roll to be blocked.
The present invention is not limited to the above embodiments, and any structural changes made by the teaching of the present invention can be made within the scope of the present invention, and all technical solutions similar or identical to the present invention are within the scope of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (1)
1. A control method for solving the problem of blocking of the area of a slab sizing machine is characterized by comprising the following steps of:
1) adjusting a control time sequence, when the pinch roll is switched to be under pressure control, firstly converting the pressure control into 250KN pressure control, delaying for 2 seconds and then switching to be under 400KN pressure control;
2) when the head of the strip blank reaches the pinch roll, if the pinch roll does not detect the pressure, the roll gap of the pinch roll is pressed down for 4mm for continuous detection, when the load pressure is detected to be 100KN, the L/R detection is triggered, and the roll table starting control is executed;
3) the pressure control conversion delay of the guide roller is increased by 2 seconds for switching, and meanwhile, the load pressure is reduced by 200 KN;
4) when the pinch roll is seriously abraded, the pinch roll is replaced in time, and gaskets are added on two sides and are 10-12 mm higher than other roll surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357563.0A CN114618891B (en) | 2022-04-06 | 2022-04-06 | Control method for solving problem of area blockage of slab width-fixing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357563.0A CN114618891B (en) | 2022-04-06 | 2022-04-06 | Control method for solving problem of area blockage of slab width-fixing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114618891A true CN114618891A (en) | 2022-06-14 |
| CN114618891B CN114618891B (en) | 2023-08-18 |
Family
ID=81906464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210357563.0A Active CN114618891B (en) | 2022-04-06 | 2022-04-06 | Control method for solving problem of area blockage of slab width-fixing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114618891B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007222918A (en) * | 2006-02-24 | 2007-09-06 | Jfe Steel Kk | Slip detection method and slip prevention method in width reduction press equipment |
| CN103223423A (en) * | 2013-04-18 | 2013-07-31 | 北京金自天正智能控制股份有限公司 | Control method for walking-stopping type high-side-pressure sizing press |
| CN105983583A (en) * | 2016-06-28 | 2016-10-05 | 首钢京唐钢铁联合有限责任公司 | Steel rejection method for outlet pinch roll of sizing machine |
| CN107159717A (en) * | 2017-06-09 | 2017-09-15 | 首钢京唐钢铁联合有限责任公司 | A kind of constant width machine control method |
| CN111266415A (en) * | 2020-01-21 | 2020-06-12 | 鞍钢股份有限公司 | Production method for preventing tail of hot-rolled narrow strip steel from being ultra-wide |
| CN113877968A (en) * | 2020-07-01 | 2022-01-04 | 宝山钢铁股份有限公司 | Method for preventing width fixing machine from slipping |
-
2022
- 2022-04-06 CN CN202210357563.0A patent/CN114618891B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007222918A (en) * | 2006-02-24 | 2007-09-06 | Jfe Steel Kk | Slip detection method and slip prevention method in width reduction press equipment |
| CN103223423A (en) * | 2013-04-18 | 2013-07-31 | 北京金自天正智能控制股份有限公司 | Control method for walking-stopping type high-side-pressure sizing press |
| CN105983583A (en) * | 2016-06-28 | 2016-10-05 | 首钢京唐钢铁联合有限责任公司 | Steel rejection method for outlet pinch roll of sizing machine |
| CN107159717A (en) * | 2017-06-09 | 2017-09-15 | 首钢京唐钢铁联合有限责任公司 | A kind of constant width machine control method |
| CN111266415A (en) * | 2020-01-21 | 2020-06-12 | 鞍钢股份有限公司 | Production method for preventing tail of hot-rolled narrow strip steel from being ultra-wide |
| CN113877968A (en) * | 2020-07-01 | 2022-01-04 | 宝山钢铁股份有限公司 | Method for preventing width fixing machine from slipping |
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| Publication number | Publication date |
|---|---|
| CN114618891B (en) | 2023-08-18 |
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