CN110227724B - Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam - Google Patents
Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam Download PDFInfo
- Publication number
- CN110227724B CN110227724B CN201910494248.0A CN201910494248A CN110227724B CN 110227724 B CN110227724 B CN 110227724B CN 201910494248 A CN201910494248 A CN 201910494248A CN 110227724 B CN110227724 B CN 110227724B
- Authority
- CN
- China
- Prior art keywords
- strip steel
- speed
- rolling force
- temper mill
- welding seam
- 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
Images
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
- B21B37/56—Elongation control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/18—Elongation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention relates to a parameter control method of a welding line passing continuous annealing six-roller cold rolling temper mill, which specifically comprises the following steps: step 1, monitoring and correcting production line tracking data; step 2, when the welding seam of the strip steel is close to the leveler, the strip steel passes throughThe calculation formula calculates and controls each parameter in real time, and reduces the speed of the strip steel to 60 m/min; step 3, finishing speed adjustment when the distance between the position of the welding line and the leveler is 0.5m, and keeping the speed of 60m/min to enter the leveler; step 4, when the speed is reduced to 60m/min, the flattening rolling force is adjusted to the maximum value R allowed by the strip steelsThe calculation formula of the maximum value is as follows: rs＝35.9*t+0.043*w+0.39*t2+0.8*t*w*10‑3‑1.1*w2*10‑5(ii) a And 5, after the position of the welding line passes by 0.2m of the temper mill, increasing the advancing speed of the strip steel to 200m/min, avoiding the product with roll mark defects caused by overlarge impact force of the welding line on a working roll of the temper mill, and simultaneously reducing the length of an area with inconsistent elongation of the head of the strip steel.
Description
Technical Field
The invention relates to the field of cold-rolled strip steel production parameter control, in particular to a parameter control method of a six-roller cold-rolled temper mill for weld joint continuous annealing.
Background
The elongation of the temper mill in the cold rolling continuous annealing unit is a key process parameter of continuous annealing strip steel, and the final performance of the strip steel product is determined. The main control parameters of the leveling process are the leveling rolling force and the tension before and after leveling, and the main control targets of the leveling process are the elongation of the steel coil and the surface quality of the steel coil.
An important node in the process of leveling cold-rolled strip steel is the welding position of the joint of two coils of strip steel, which is hereinafter referred to as the welding seam position. When the position of a welding line is leveled, the welding line structure is possibly broken due to overlarge leveling speed and leveling rolling force, the strip breakage accident is caused, the production is seriously influenced, in addition, the welding line impacts a working roller of the leveling machine, the surface defects of the working roller, such as dent, scratch and the like are caused, and the surface quality of the subsequently produced strip steel is further influenced.
For example, patent 200810012918.2 discloses a method for continuously rolling a flat weld of a cold-rolled sheet, which comprises controlling a hydraulic cylinder of a flat roll and front and rear tension rolls of a flat mill by a computer, adjusting the rolling force and the running speed of a strip steel, and realizing the continuous flat rolling of the weld of the cold-rolled sheet by a control method of reducing the rolling force first and then restoring the rolling force and then restoring the speed.
According to the method for accurately controlling the elongation of the strip steel during the process of passing through the welding line temper mill, provided by the patent CN104107837, the elongation of the strip steel is quickly and accurately controlled by adjusting the advancing speed of the strip steel before passing through the welding line temper mill and the rolling force after passing through the welding line temper mill, and the yield of the strip steel is improved.
When the position of the welding line is close to the temper mill, the control method of firstly reducing the speed and then reducing the rolling force, firstly recovering the rolling force and then recovering the speed is adopted. Because the control method usually uses fixed over-welding rolling force and overlong low-rolling-force rolling time, the deviation between the actual elongation of a longer strip steel and the target elongation of the strip steel is often caused, product defects such as inconsistent performance, poor surface quality and the like can be generated within the distance of 0-15m from the head of the strip steel to the welding position, and the part of the strip steel can be cut before being curled, so that the yield of the strip steel is reduced.
The above contents indicate that a production method capable of ensuring the control of the elongation of the strip steel and improving the reduction of the yield of the strip steel while avoiding the defects of strip breakage and roll mark is needed at present.
Disclosure of Invention
The invention aims to provide a parameter control method of a six-roller cold rolling temper mill for continuous annealing of a welding line, which can avoid the defects of strip breakage and roll mark, ensure the elongation of strip steel and improve the yield of the strip steel.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a parameter control method of a six-roller cold rolling temper mill for continuous annealing of a welding seam is characterized by comprising the following steps:
step 3, when the distance between the position of the welding line and the leveling machine is 0.5m, finishing the speed adjustment, and keeping the speed of 60m/min to enter the leveling machine;
step 4, when the speed is reduced to 60m/min, the flattening rolling force is adjusted to the maximum rolling force allowed by the strip steel at the position of the weld joint;
and 5, increasing the running speed of the strip steel to 200m/min after the position of the welding line passes through the leveler by 0.2 m.
Further, when the welding seam of the strip steel in the step 2 is close to the planisher, the distance between the welding seam and the planisher is larger than 0.5 m.
Further, in the step 2, the calculation formula is as follows:
in the formula, s is the distance from the welding seam to the temper mill when the speed reduction is started;
Vathe actual speed of the strip steel when the speed reduction is started;
Racurrent rolling force (KN);
Rsmaximum allowable rolling force (KN) of the strip steel at the position of the weld joint;
and a is the rolling force regulation speed (KN/s).
Further, in the step 4, the maximum allowable rolling force of the strip steel at the position of the weld passing position is determined according to a calculation formula as follows:
Rs＝35.9*t+0.043*w+0.39*t2+0.8*t*w*10-3-1.1*w2*10-5
in the formula, RsThe maximum rolling force allowed by the strip steel at the position of the weld joint is obtained;
t is the thickness (mm) of the strip steel;
w is the strip width (mm).
The technical scheme of the invention controls the elongation of the strip steel when the welding line passes through the temper mill by adjusting the advancing speed of the strip steel before the welding line passes through the temper mill, the magnitude of the rolling force after the welding line passes through the temper mill and the change speed of the rolling force, and has the following advantages:
1. reducing the fluctuation range of the elongation of the strip steel when the welding seam passes through the leveler;
2. the length of unqualified elongation strip steel is reduced while the roller is ensured not to generate roller mark defects, and the utilization rate of the finished product of the strip steel is improved;
3. the implementation operation is simple and easy.
The advantageous effects of the additional features of the present invention will be explained in the detailed description section of the present specification.
Drawings
FIG. 1 is a schematic diagram of a six-roller cold rolling temper mill for weld passing continuous annealing in the embodiment of the invention;
FIG. 2 is a graph showing the fluctuation of rolling force in the method for controlling parameters according to the embodiment of the present invention and the conventional art;
FIG. 3 is a graph showing the fluctuation of the elongation of the strip in the rolling force according to the method for controlling the parameters of the embodiment of the present invention and the conventional art.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The embodiment of the application provides a parameter control method of a welding line continuous annealing six-roller cold rolling temper mill, which comprises the following steps:
referring to fig. 1, when a strip steel with a thickness of 1.8mm and a width of 1302mm enters a leveler, the position of a weld joint is tracked, a tension roller in front of the leveler is adjusted to correct tracking data, and the deviation between a tracking signal and the actual position of the strip steel is 0.03 m.
When its head is 1.87m away from the weld
And adjusting the running speed of the strip steel, reducing the strip steel speed from 200m/min to 60m/min, and keeping the strip steel speed of 60m/min to enter the temper mill when the distance between the position of a welding line and the temper mill is 0.2 m.
The rolling force set value is adjusted to 105KN of the maximum rolling force Rs allowed by the strip steel at the position of the over-welding seam while the running speed of the strip steel is reduced, and the specific calculation process is that
Rs＝35.9*t+0.043*w+0.39*t2+0.8*t*w*10-3-1.1*w2*10-5。
And when the position of the welding line passes by 0.2m of the temper mill, increasing the advancing speed of the strip steel to 200m/min, and adjusting the rolling force and the temper tension to target values according to the target elongation rates corresponding to different strip steels.
Referring to fig. 2 and 3, fig. 2 is a graph showing the fluctuation of rolling force in the case of using the conventional temper mill manufacturing process and the manufacturing process according to the present invention; wherein A is the rolling force fluctuation curve when the existing temper mill production process is adopted, and B is the rolling force fluctuation curve when the production process is adopted. As can be seen from FIG. 2, the rolling force curve B during the production of the invention has shorter low rolling distance and is a fluctuation curve of the elongation of the strip steel when compared with the prior art of FIG. 3 which adopts the prior temper mill production process and the production process of the invention. As can be seen from FIG. 3, the fluctuation length of the elongation of the strip steel corresponding to the C curve is far smaller than that of the elongation of the strip steel corresponding to the B curve in the original scheme, the elongation of the B curve in the original scheme is not equal to about 5.1m, and the elongation of the C curve is not equal to about 2.7 m. Therefore, the control method of the embodiment not only accurately controls the elongation value of the welding line when passing through the flattening machine, but also improves the utilization rate of the strip steel material, and saves the production input cost in material and time.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (2)
1. A parameter control method of a six-roller cold rolling temper mill for continuous annealing of a welding seam is characterized by comprising the following steps:
step 1, monitoring and correcting production line tracking data, correcting the tracking data by using a front tension roller of a temper mill, wherein the deviation between the detection position of a tracking signal and the position of a strip steel head is less than 0.1 m;
step 2, when the welding seam of the strip steel is close to a temper mill, calculating parameters for controlling the rolling force and the adjusting speed of the rolling force in real time through a calculation formula, and reducing the speed of the strip steel to 60 m/min;
the calculation formula is as follows:
in the formula, s is the distance from the welding seam to the temper mill when the speed reduction is started;
Vathe actual speed of the strip steel when the speed reduction is started;
Racurrent rolling force (KN);
Rsmaximum allowable rolling force (KN) of the strip steel at the position of the weld joint;
a is a rolling force adjusting speed (KN/s);
step 3, finishing speed adjustment when the distance between the position of the welding line and the leveler is 0.5m, and keeping the speed of 60m/min to enter the leveler;
step 4, when the speed is reduced to 60m/min, the flattening rolling force is adjusted to the maximum rolling force allowed by the strip steel at the position of the weld joint;
the maximum value is determined according to the calculation formula:
Rs＝35.9*t+0.043*w+0.39*t2+0.8*t*w*10-3-1.1*w2*10-5
in the formula, RsThe maximum rolling force allowed by the strip steel at the position of the weld joint is obtained;
t is the thickness (mm) of the strip steel;
w is the strip width (mm);
and 5, increasing the running speed of the strip steel to 200m/min after the position of the welding line passes through the leveler by 0.2 m.
2. The parameter control method for the six-roller cold-rolling planishing mill with the continuous annealing of the welding seam according to claim 1, wherein when the welding seam of the strip steel in the step 2 is close to the planishing mill, the distance between the welding seam position and the planishing mill is more than 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910494248.0A CN110227724B (en) | 2019-06-09 | 2019-06-09 | Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910494248.0A CN110227724B (en) | 2019-06-09 | 2019-06-09 | Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110227724A CN110227724A (en) | 2019-09-13 |
| CN110227724B true CN110227724B (en) | 2021-04-16 |
Family
ID=67859414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910494248.0A Active CN110227724B (en) | 2019-06-09 | 2019-06-09 | Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110227724B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031519B (en) * | 2021-03-02 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for reducing unfinished head of finished strip steel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2748831B2 (en) * | 1992-09-11 | 1998-05-13 | 日本鋼管株式会社 | Temper rolling method |
| CN101658869B (en) * | 2008-08-25 | 2011-07-27 | 鞍钢股份有限公司 | Method for rolling cold-rolled sheet to continuously flatten welding seam |
| CN102641900B (en) * | 2010-12-01 | 2015-06-10 | 上海宝信软件股份有限公司 | Temper mill elongation control method and control equipment |
| CN102485364B (en) * | 2010-12-01 | 2015-06-17 | 上海宝信软件股份有限公司 | Tension stabilizing control method and device for leveling machine |
| CN103252346B (en) * | 2012-02-17 | 2015-07-22 | 宝山钢铁股份有限公司 | Plate connecting method for improving flying gauge change rolling stability |
| CN104107837B (en) * | 2013-04-19 | 2016-02-24 | 宝山钢铁股份有限公司 | The method of accurate control cincture steel percentage elongation when weld seam crosses planisher |
| CN105251780B (en) * | 2015-11-11 | 2017-05-03 | 首钢总公司 | Control method for ductility fluctuation of temper mill |
-
2019
- 2019-06-09 CN CN201910494248.0A patent/CN110227724B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110227724A (en) | 2019-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110227723B (en) | Parameter control method for initial section of continuous annealing six-roller cold rolling temper mill | |
| CN101905246B (en) | Automatic control method for dynamic variable specification welding seam of rolling mill | |
| CN101693265B (en) | Method and device for adjusting strip steel transverse warping by using pinch rolls | |
| CN109570241B (en) | Wedge-shaped control method with deviation protection | |
| CN108994091B (en) | A kind of cold-rolling mill closes the scaling method of seam print | |
| CN110227724B (en) | Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam | |
| CN110170535B (en) | Automatic control method for welding seam passing rolling force of galvanizing skin pass mill | |
| CN112024642B (en) | Automatic hot straightening method for steel plate | |
| CN106391759A (en) | Production method for alleviating transverse bends of thick-specification cold-rolled plate | |
| CN103624088B (en) | Eliminate the method for steel plate tail transverse crack | |
| CN110961491B (en) | Strip steel pulling and straightening production method and device | |
| CN110893418B (en) | Control method for passing welding seam of temper mill | |
| CN112222202B (en) | Control method for tension switching of strip steel welding line over-leveling equipment | |
| KR101439682B1 (en) | Apparatus and method of controlling profile of black plate | |
| JP5246947B2 (en) | Method for temper rolling of steel sheet | |
| CN110369515A (en) | A kind of change specification threading control method of aluminium hot rolling tandem mill unit sheet band | |
| CN113134515A (en) | Method for controlling width of strip steel by utilizing front vertical roll of finishing mill in hot continuous rolling production line | |
| CN105414183A (en) | Technology method for manufacturing wide sheet through magnesium alloy cast rolled plate | |
| CN118385285A (en) | Control method of continuous annealing six-roller cold rolling temper mill tension and rolling force matching process | |
| CN110193515B (en) | Rolling method of austenitic stainless steel hard plate | |
| CN111992588B (en) | Method for controlling cold-rise of sleeve of strip steel layer | |
| CN109794640B (en) | Double-turning-point shearing method for mirror image variable-thickness plate | |
| CN112246871A (en) | Method and device for passing weld joint of temper mill | |
| CN116900058A (en) | Control method for dynamically adjusting strip steel tail flick deviation by combining galvanized raw material plate shape | |
| JP2513866B2 (en) | Shape control method |
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 |