CN112453067A - Rough rolling plate shape adjusting method - Google Patents
Rough rolling plate shape adjusting method Download PDFInfo
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- CN112453067A CN112453067A CN201910848008.6A CN201910848008A CN112453067A CN 112453067 A CN112453067 A CN 112453067A CN 201910848008 A CN201910848008 A CN 201910848008A CN 112453067 A CN112453067 A CN 112453067A
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- Prior art keywords
- value
- wedge
- intermediate billet
- linear deviation
- adjusting
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
Abstract
The invention provides a rough rolling plate shape adjusting method, which comprises the following steps: collecting a measured value of the wedge value of the intermediate billet, and adjusting the wedge value of the intermediate billet when the measured value of the wedge value exceeds a preset value of the wedge value; the method comprises the steps of collecting a measured value of the linear deviation degree of the intermediate billet, adjusting the linear deviation degree of the intermediate billet when the measured value of the linear deviation degree exceeds a preset value of the linear deviation degree, adjusting the wedge value and the linear deviation degree of the intermediate billet to meet the process requirements of the intermediate billet in the processing process, avoiding the problem that the intermediate billet is inconvenient to process when rolling thin steel due to the fact that the wedge value is too large, and avoiding deviation of the intermediate billet in the rolling and transmission processes due to the fact that the linear deviation degree is large.
Description
Technical Field
The invention relates to the field of metallurgical industry, in particular to a rough rolling plate shape adjusting method.
Background
Currently, in the process of hot rolling an intermediate billet, it is necessary to adjust the wedge value of the intermediate billet (i.e., the thickness of the edge of the intermediate billet) and the degree of linear deviation along the conveying direction to meet the process requirements of the finished product, and when a thinner intermediate billet needs to be rolled or the length of the intermediate billet is longer, it is inconvenient to control the wedge value and the degree of linear deviation.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a slab shape adjusting method for rough rolling, which solves the problem of inconvenience in adjusting slab shape when rolling an intermediate slab in the prior art.
To achieve the above and other related objects, the present invention provides a slab shape adjusting method for rough rolling, comprising: collecting a measured value of the wedge value of the intermediate billet, and adjusting the wedge value of the intermediate billet when the measured value of the wedge value exceeds a preset value of the wedge value;
and collecting a measured value of the linear deviation degree of the intermediate billet, and adjusting the linear deviation degree of the intermediate billet when the measured value of the linear deviation degree exceeds a preset value of the linear deviation degree.
Optionally, when the measured value of the wedge value exceeds the preset value of the wedge value, the step of adjusting the wedge value of the intermediate billet further includes: and adjusting according to the measured value of the wedge value of the previous intermediate blank.
Optionally, when the wedge value is adjusted, the mathematical expression of the distance between the roll gaps in the intermediate billet pressing system is as follows:
Devgap1x(n)＝Kx*(1/width)*wedge(n-1)
wherein Devgap1x (n) represents the gap distance of the roll gap of the nth intermediate billet in the x-th pass, Kx represents the adjustment coefficient of the gap distance of the roll gap of the x-th pass, width represents the width of the intermediate billet, and wedge (n-1) represents the measured value of the wedge value of the nth-1 intermediate billet.
Optionally, the step of adjusting the degree of linear deviation of the intermediate blank further includes:
and adjusting according to the linear deviation degree of the previous intermediate billet.
Optionally, when the linear deviation degree of the intermediate billet is adjusted, the mathematical expression of the distance between the roll gaps in the intermediate billet pressing system is as follows:
Devgap2y(kn)＝Ky*(1/width)*ΔWyk(n-1)
wherein Devgap2y (kn) represents the roll gap distance of the linear deviation degree of the nth intermediate billet of the heating furnace of No. k at the y-th pass, Ky represents the adjustment coefficient of the roll gap distance of the y-th pass, width represents the width of the intermediate billet, and delta Wyk (n-1) represents the measured value of the linear deviation degree of the nth-1 intermediate billet.
As described above, the rough rolling strip shape adjusting method of the present invention has the following advantageous effects: the wedge value and the linear deviation degree of the intermediate billet are adjusted, the technological requirement of the intermediate billet in the processing process is met, the problem that the intermediate billet is not convenient to process when being rolled by the aid of overlarge wedge value is avoided, and the deviation of the intermediate billet in the rolling and transmission processes due to large linear deviation degree is also avoided.
Drawings
Fig. 1 is a schematic flow chart of a rough rolling strip shape adjusting method according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1, the present invention provides a method for adjusting a rough rolling plate shape, comprising:
s1: collecting a measured value of the wedge value of the intermediate billet, arranging a width gauge at an outlet of a rough rolling area, and adjusting the wedge value of the intermediate billet when the measured value of the wedge value exceeds a preset value of the wedge value;
s2: and collecting a measured value of the linear deviation degree of the intermediate billet, arranging a multifunctional instrument at a finish rolling outlet, and adjusting the linear deviation degree of the intermediate billet when the measured value of the linear deviation degree exceeds a preset value of the linear deviation degree.
In order to improve the adjustment precision of the wedge value, when the measured value of the wedge value exceeds the preset value of the wedge value, the step of adjusting the wedge value of the intermediate blank further comprises the following steps: adjusting according to the measured value of the wedge value of the previous intermediate blank,
in the implementation process, when the wedge value is adjusted, the distance between the roll gaps in the intermediate billet pressing system is expressed mathematically as follows:
Devgap1x(n)＝Kx*(1/width)*wedge(n-1)
wherein, Devgap1x (n) is expressed as the distance between the roll gaps of the nth intermediate billet in the x-th pass, Kx is expressed as the adjustment coefficient of the distance between the roll gaps of the x-th pass, width is expressed as the width of the intermediate billet, wedge (n-1) is expressed as the measured value of the wedge value of the n-1 th intermediate billet, for example, because the slab of 1, 2 and 3 passes is thick and the deviation is small, the wedge value can be adjusted by using 1/2/3 passes, the wedge is the thickness of the transmission side of the intermediate billet-the thickness of the operation side, the wedge takes the finish rolling wedge as the reference value, and the concrete control is as follows: controlling the thickness of the finished product to be less than or equal to 9.0mm, controlling the wedge value to be +/-50 mm, controlling the thickness of the finished product to be more than 9.0mm, controlling the wedge value to be +/-80 mm, and if the actual wedge exceeds the control range, not starting wedge adjustment; adjusting the wedge value by adopting the roll gap difference between the transmission side and the operation side of a rough rolling hydraulic pressing system; the predetermined amount is devgap (drive side gap-operator side gap), devgap is set to + decgap/2 on the drive side and-decgap/2 on the operator side at the set gap.
In order to improve the adjustment precision of the degree of linear deviation, the step of adjusting the degree of linear deviation of the intermediate blank further comprises: and adjusting according to the linear deviation degree of the previous intermediate billet.
In the implementation process, the mathematical expression of the distance between the roll gaps in the pressing system of the intermediate billet when the linear deviation degree of the intermediate billet is adjusted is as follows:
Devgap2y(kn)＝Ky*(1/width)*ΔWyk(n-1)
wherein Devgap2y (kn) represents the roll gap distance of the linear deviation degree of the nth intermediate billet of the heating furnace of No. k at the y-th pass, Ky represents the adjustment coefficient of the roll gap distance of the y-th pass, width represents the width of the intermediate billet, and delta Wyk (n-1) represents the measured value of the linear deviation degree of the nth-1 intermediate billet. For example, the control can be performed by adopting 3, 4 and 5 passes, and the adjustment can be performed according to the head and tail deviation position. If the intermediate billet deviates from the transmission side, the roll gap of the transmission side is pressed down. Acquiring width gauge data by the head and tail deviation, adjusting the position delta W of the head of the plate blank from a central line, and adjusting the linear deviation by adopting the roll gap difference between the transmission side and the operation side of a rough rolling hydraulic pressing system; the given amount is devgap2 (drive side gap-operator side gap), devgap is the drive side adjustment + decgap/2 and the operator side adjustment is-decgap/2 at the set gap.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A rough rolling strip shape adjusting method is characterized by comprising the following steps:
collecting a measured value of the wedge value of the intermediate billet, and adjusting the wedge value of the intermediate billet when the measured value of the wedge value exceeds a preset value of the wedge value;
and collecting a measured value of the linear deviation degree of the intermediate billet, and adjusting the linear deviation degree of the intermediate billet when the measured value of the linear deviation degree exceeds a preset value of the linear deviation degree.
2. The slab shape adjusting method of claim 1, wherein the step of adjusting the wedge value of the intermediate slab when the measured value of the wedge value exceeds the preset value of the wedge value further comprises:
and adjusting according to the measured value of the wedge value of the previous intermediate blank.
3. The rough roll slab shape adjusting method according to claim 1 or 2, characterized in that: when the wedge value is adjusted, the distance between the roll gaps in the intermediate billet pressing system is expressed mathematically as:
Devgap1x(n)＝Kx*(1/width)*wedge(n-1)
wherein Devgap1x (n) represents the gap distance of the roll gap of the nth intermediate billet in the x-th pass, Kx represents the adjustment coefficient of the gap distance of the roll gap of the x-th pass, width represents the width of the intermediate billet, and wedge (n-1) represents the measured value of the wedge value of the nth-1 intermediate billet.
4. The rough roll plate shape adjusting method according to claim 1, wherein the step of adjusting the degree of linear deviation of the intermediate slab further comprises:
and adjusting according to the linear deviation degree of the previous intermediate billet.
5. The roughing plate shape adjusting method according to claim 1, wherein the mathematical expression of the gap distance in the intermediate slab hold-down system when the degree of linear deviation of the intermediate slab is adjusted is:
Devgap2y(kn)＝Ky*(1/width)*ΔWyk(n-1)
wherein Devgap2y (kn) represents the roll gap distance of the linear deviation degree of the nth intermediate billet of the heating furnace of No. k at the y-th pass, Ky represents the adjustment coefficient of the roll gap distance of the y-th pass, width represents the width of the intermediate billet, and delta Wyk (n-1) represents the measured value of the linear deviation degree of the nth-1 intermediate billet.
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| CN201910848008.6A CN112453067B (en) | 2019-09-09 | 2019-09-09 | Rough rolling plate shape adjusting method |
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| CN112453067B CN112453067B (en) | 2022-12-09 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6448613A (en) * | 1987-08-20 | 1989-02-23 | Nippon Steel Corp | Camber control method for cold rolling |
| CN102641903A (en) * | 2011-02-16 | 2012-08-22 | 宝山钢铁股份有限公司 | Steckel mill rolled piece head-and-tail deviation control method |
| CN105290123A (en) * | 2015-10-10 | 2016-02-03 | 山东钢铁股份有限公司 | Detection method and detection system for cambering of heavy and medium plate mill |
| CN106269908A (en) * | 2015-05-27 | 2017-01-04 | 宝山钢铁股份有限公司 | Strip steel wedge shape autocontrol method based on heredity |
| CN106475424A (en) * | 2015-08-25 | 2017-03-08 | 宝山钢铁股份有限公司 | A kind of control method of Hot Rolling Strip sideslip |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN108500067A (en) * | 2018-04-11 | 2018-09-07 | 攀钢集团攀枝花钢钒有限公司 | The plate shape method of adjustment of hot-continuous-rolling strip steel |
| CN109570241A (en) * | 2017-09-29 | 2019-04-05 | 宝山钢铁股份有限公司 | A kind of wedge-shaped control system and method with sideslip protection |
-
2019
- 2019-09-09 CN CN201910848008.6A patent/CN112453067B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6448613A (en) * | 1987-08-20 | 1989-02-23 | Nippon Steel Corp | Camber control method for cold rolling |
| CN102641903A (en) * | 2011-02-16 | 2012-08-22 | 宝山钢铁股份有限公司 | Steckel mill rolled piece head-and-tail deviation control method |
| CN106269908A (en) * | 2015-05-27 | 2017-01-04 | 宝山钢铁股份有限公司 | Strip steel wedge shape autocontrol method based on heredity |
| CN106475424A (en) * | 2015-08-25 | 2017-03-08 | 宝山钢铁股份有限公司 | A kind of control method of Hot Rolling Strip sideslip |
| CN105290123A (en) * | 2015-10-10 | 2016-02-03 | 山东钢铁股份有限公司 | Detection method and detection system for cambering of heavy and medium plate mill |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN109570241A (en) * | 2017-09-29 | 2019-04-05 | 宝山钢铁股份有限公司 | A kind of wedge-shaped control system and method with sideslip protection |
| CN108500067A (en) * | 2018-04-11 | 2018-09-07 | 攀钢集团攀枝花钢钒有限公司 | The plate shape method of adjustment of hot-continuous-rolling strip steel |
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