CN101209460B - Method for implementing steady control for elongation by using thickness control system - Google Patents
Method for implementing steady control for elongation by using thickness control system Download PDFInfo
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- CN101209460B CN101209460B CN2006101558400A CN200610155840A CN101209460B CN 101209460 B CN101209460 B CN 101209460B CN 2006101558400 A CN2006101558400 A CN 2006101558400A CN 200610155840 A CN200610155840 A CN 200610155840A CN 101209460 B CN101209460 B CN 101209460B
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- thickness
- control system
- extensibility
- percentage elongation
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Abstract
The invention discloses a method for adopting a thickness closed-loop control system to achieve the extensibility closed-loop control, which ensures that a current thickness control system can be used for timely measuring the material thickness H in of an inlet of a rolling mill and calculate the targeted setting value H out of a thickness gauge of an outlet of the rolling mill according to the formula H out = H in (1-r) and the set value r of the extensibility. The invention can adjust the outlet thickness to achieve the targeted extensibility through adjusting the rolling intensity, thus solving the problem of instable extensibility due to constant rolling intensity during the production process, and adopts the current control system to realize stable control of the extensibility with the variation ranged controlled at plus or minus 0.1 percent, thereby reducing the equipment investment and work intensity of an operator, caused by frequent change of technique parameters.
Description
Technical field
The present invention relates to the production method of steel, the control method of percentage elongation in especially a kind of belt steel flating process.
Background technology
Cold-rolled low carbon steel is eliminated the work hardening tissue, but mechanical property and processing characteristics is degenerated through recrystallization annealing.At this moment band steel stress-strain diagram has significantly goes up yield limit, and yield point elongation occurs in following yield limit.The main purpose of cold rolling levelling machine is with less deflection (being generally 0.3%～3.0% percentage elongation), and the cold-strip steel after the annealing is rolled (smooth), with the yield point elongation of elimination band steel and slight shape wave, the surface topography that obtains requiring.In the smooth production, percentage elongation is most important technological parameter, and percentage elongation is too small can't eliminate yield point elongation, the excessive performance that influences product, and the processing quality control of formation process is mainly controlled by percentage elongation.
If the cycle is interior L at one time
EnBe defined as strip steel at entry length, L
ExBe defined as outlet band steel length, then smooth percentage elongation r is defined as:
According to the constancy of volume principle, on the planisher that closed loop extension control system (laser velocimeter) is housed, can measure smooth percentage elongation with the speed before and after the planisher, its formula is:
r＝(VH-Vh)/VH*100％
In the formula: Vh, before VH-----is smooth, the strip speed after smooth.
The main purpose of milling train is the thickness that the back steel plate is rolled in control, and milling train is equipped with the closed loop thickness control system, and planisher requires the closed-loop control of percentage elongation, and both have very big difference.Closed loop thickness control is to utilize the calibrator of milling train front and back to measure thickness, realizes strange, even number rolling pass closed loop thickness control by adjusting roll-force.The percentage elongation closed-loop control is a tachometric survey percentage elongation of measuring the planisher front and back, realizes control automatically by adjusting roll-force and tension force.
General planisher is to calculate percentage elongation, and realize the percentage elongation closed-loop controls by regulating systems such as roll-force, tension force, speed by (laser velocimeter) measurement frame inlet, muzzle velocity; Singlestandmill is not owing to there is the percentage elongation measuring system, level off the roll-force that can only provide unlike material, different size after putting in order by experience in the past, in milling train is held concurrently the planisher process, usually adopt permanent roll-force control, its percentage elongation instability, it is bigger to fluctuate, and is difficult to realize the closed-loop control of percentage elongation.
Summary of the invention
The object of the present invention is to provide a kind of method of under the prerequisite that does not increase equipment, utilizing thickness control system to realize specific elongation steadily control.
The object of the present invention is achieved like this, and a kind of method of utilizing the closed loop thickness control system to realize the percentage elongation closed-loop control is characterized in that: during milling train double as planisher, according to formula H
Go out=H
Go into(1-r) and utilize existing thickness control system, measure milling train inlet supplied materials thickness H in real time
Go into,, calculate milling train outlet calibrator goal-setting value H in conjunction with percentage elongation set-point r
Go out, thickness control system of the rolling mill is realized the percentage elongation closed-loop control by guaranteeing the milling train exit thickness.
The present invention utilizes thickness control system to realize that the foundation of specific elongation steadily control is:
1) according to the operation principle of elongation control system, the target percentage elongation is converted to target thickness.
On the planisher that closed loop extension control system is housed, can measure smooth percentage elongation with the speed before and after the planisher, its formula is:
r＝(VH-Vh)/VH*100％
In the formula:
Vh, before VH-----is smooth, the strip speed after smooth.
According to the constancy of volume principle,
R=(H
Go into-H
Go out)/H
Go into* 100%
H
Go out=H
Go into(1-r)
2), target thickness be arranged, when the outlet calibrator detects the discovery deviation according to the thickness control system operation principle, size according to thickness deviation calculates regulated quantity, the output control signal, according to control signal, the adjustment process (see figure 1) is finished in the governor motion action then.
Because the present invention has adopted above-mentioned control method, the percentage elongation fluctuation range can be controlled at ± 0.02%, changed the problem of percentage elongation shakiness in the permanent roll-force production process, both reduced the input of equipment, alleviated the operative employee again because the frequent working strength of revising technological parameter.
Description of drawings
Fig. 1 is existing belt steel thickness control principle figure;
Fig. 2 is a band steel elongation control schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 2, a kind of method of utilizing the closed loop thickness control system to realize the percentage elongation closed-loop control of the present invention is during milling train double as planisher, according to formula H
Go out=H
Go into(1-r) and utilize existing thickness control system, measure milling train inlet supplied materials thickness H in real time
Go into,, calculate milling train outlet calibrator goal-setting value H in conjunction with percentage elongation set-point r
Go out, thickness control system of the rolling mill is realized the percentage elongation closed-loop control by guaranteeing the milling train exit thickness.
The present invention has increased computing formula at thickness control system: H with the example that is applied as on industrial 1250 cold-rolling mills of cold-strip steel
Go out=H
Go into(1-r), its method for thickness regulation kept tension force and the roll-force method identical with planisher elongation control control method.We can meet the demands ± 0.1% at actual detected percentage elongation fluctuation range.Concrete data see Table 1:
Table 1
Claims (1)
1. a method of utilizing the closed loop thickness control system to realize the percentage elongation closed-loop control is characterized in that: during milling train double as planisher, according to formula H
Go out=H
Go into(1-r) can utilize existing thickness control system, measure milling train inlet supplied materials thickness H in real time
Go into,, calculate milling train outlet calibrator goal-setting value H in conjunction with percentage elongation set-point r
Go out, thickness control system of the rolling mill is realized the percentage elongation closed-loop control by guaranteeing the milling train exit thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101558400A CN101209460B (en) | 2006-12-27 | 2006-12-27 | Method for implementing steady control for elongation by using thickness control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101558400A CN101209460B (en) | 2006-12-27 | 2006-12-27 | Method for implementing steady control for elongation by using thickness control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101209460A CN101209460A (en) | 2008-07-02 |
| CN101209460B true CN101209460B (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101558400A Expired - Fee Related CN101209460B (en) | 2006-12-27 | 2006-12-27 | Method for implementing steady control for elongation by using thickness control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553923A (en) * | 2011-12-31 | 2012-07-11 | 中冶南方（武汉）自动化有限公司 | Control method for self-adaption compensation of elongation of planisher |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180207B (en) * | 2014-11-13 | 2018-03-09 | 华冠新型材料股份有限公司 | A kind of control system for rolling plate thickness |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001269707A (en) * | 2000-03-27 | 2001-10-02 | Kawasaki Steel Corp | Method for controlling elongation percentage in temper rolling mill |
| JP2002282922A (en) * | 2001-03-22 | 2002-10-02 | Nippon Steel Corp | Extension ratio control method for continuous temper rolling mill |
| JP2002301510A (en) * | 2001-04-02 | 2002-10-15 | Nippon Steel Corp | Device for controlling elongation percentage for continuous temper mill |
| JP2006095592A (en) * | 2004-09-30 | 2006-04-13 | Jfe Steel Kk | Extension rate control method in temper rolling mill |
| CN1840255A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Extension coefficient and plate shape integrated control method in steel strip flattening process |
-
2006
- 2006-12-27 CN CN2006101558400A patent/CN101209460B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001269707A (en) * | 2000-03-27 | 2001-10-02 | Kawasaki Steel Corp | Method for controlling elongation percentage in temper rolling mill |
| JP2002282922A (en) * | 2001-03-22 | 2002-10-02 | Nippon Steel Corp | Extension ratio control method for continuous temper rolling mill |
| JP2002301510A (en) * | 2001-04-02 | 2002-10-15 | Nippon Steel Corp | Device for controlling elongation percentage for continuous temper mill |
| JP2006095592A (en) * | 2004-09-30 | 2006-04-13 | Jfe Steel Kk | Extension rate control method in temper rolling mill |
| CN1840255A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Extension coefficient and plate shape integrated control method in steel strip flattening process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553923A (en) * | 2011-12-31 | 2012-07-11 | 中冶南方（武汉）自动化有限公司 | Control method for self-adaption compensation of elongation of planisher |
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| CN101209460A (en) | 2008-07-02 |
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