CN104525580B - Cold rolling flat elongation controlling system and method - Google Patents
Cold rolling flat elongation controlling system and method Download PDFInfo
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- CN104525580B CN104525580B CN201410742569.5A CN201410742569A CN104525580B CN 104525580 B CN104525580 B CN 104525580B CN 201410742569 A CN201410742569 A CN 201410742569A CN 104525580 B CN104525580 B CN 104525580B
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- strip
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- strip steel
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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
- B21B37/56—Elongation control
-
- 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a cold rolling flat elongation controlling system and method and belongs to the technical field of cold-rolled strip rolling. The system comprises a strip steel speed measurement module, a determination and selection module and a flat elongation calculation module. The strip steel speed measurement module is used for measuring strip steel running speeds in real time through an encoder to obtain a first strip steel running speed and measuring strip steel running speeds in real time through a laser speed meter to obtain a second strip steel running speed. The determination and selection module is used for comparing the first strip steel running speed with the second strip steel running speed, the second strip steel running speed serves as the strip steel running speed if the second strip steel running speed compared to the first strip steel running speed is within a set threshold range, and the first strip steel running speed serves as the strip steel running speed if the second strip steel running speed compared to the first strip steel running speed is not within the set threshold range. The flat elongation calculation module is used for calculating according to the strip steel running speed to obtain an actual strip steel flat elongation. The cold rolling flat elongation controlling system and method can achieve accurate control of the flat elongation according to the needs of a production site and after the occurrence of a sudden situation.
Description
Technical field
The present invention relates to cold rolled sheet rolling technical field, particularly to a kind of system controlling cold rolling levelling elongation percentage and
Method.
Background technology
Continuous annealing, zinc-plated skin pass mill group play the role of very important on cold-rolling production process, not only can improve strip steel
Yield strength, the mechanical property such as tensile strength and elongation percentage, and unrestrained, the middle wave in the side that strip steel can be eliminated to a certain extent
Etc. defect so as to have more preferable punching performance and flatness.In the smooth control function prolonging unit, the control of smooth elongation percentage
System plays very important effect to the characteristic of above-mentioned strip steel, and smooth elongation percentage generally can be construed to strip steel and be subject between frame
The effect of roll-force and the draw ratio that produces, the different smooth elongation percentage of different size steel grade correspondence, and the degree of accuracy that it controls
Need to reach the requirement that the high degree of comparison is just sufficient for quality, therefore how to realize to control smooth extension by precision
Rate, and do not abandon the original smooth elongation control function of encoder, realize the effective of the two and combine and complementary, be domestic at present
Each cold rolling mill needs the urgent a great problem solving outward.
Content of the invention
The technical problem to be solved is to provide a kind of system and method controlling cold rolling levelling elongation percentage, solves
Cold rolling levelling elongation control not accurately technical problem in prior art.
For solving above-mentioned technical problem, the invention provides a kind of system controlling cold rolling levelling elongation percentage, including strip steel
Speed measurement module, judge that module calculated by selecting module and smooth extensibility meter；
Wherein, described strip speed measurement module, is by encoder, the running speed of strip steel to be measured in real time, obtains
To the first strip speed, by laser velocimeter, the running speed of described strip steel is measured in real time simultaneously, obtained
Two strip speeds；
Described first strip speed is compared by described judgement selecting module with described second strip speed,
If described second strip speed is compared with described first strip speed, in the critical value range setting, described the
Two strip speeds are strip speed, and otherwise, described first strip speed is strip speed；
Smooth elongation percentage computing module, according to described strip speed, is calculated the actual smooth elongation percentage of strip steel.
Further, described first strip speed includes recording the first frame of strip steel before frame by encoder
Front strip speed and the strip speed after encoder records the first frame of strip steel after frame；Described
Two strip speeds include by laser velocimeter record before frame the strip speed before the second frame of strip steel and
Strip speed after laser velocimeter records the second frame of strip steel after frame.
Further, the described marginal value setting is as 30-40mpm.
Further, shown in the described method such as formula (1) being calculated the actual smooth elongation percentage of strip steel:
δ=(vex-ven)/ven(1)
Wherein: vexFor strip speed before frame, unit mpm；venFor strip speed after frame, unit mpm, δ is smooth prolonging
Stretch rate, unit is %.
A kind of method controlling cold rolling levelling elongation percentage, comprises the steps；
By encoder, the running speed of strip steel is measured in real time, obtain the first strip speed, pass through simultaneously
Laser velocimeter is measured in real time to the running speed of described strip steel, obtains the second strip speed；
Described first strip speed is compared with described second strip speed, if described second strip steel fortune
Compared with described first strip speed, in the critical value range setting, described second strip speed is scanning frequency degree
Strip speed, otherwise, described first strip speed is strip speed；
According to described strip speed, it is calculated the actual smooth elongation percentage of strip steel.
Further, described first strip speed includes recording the first frame of strip steel before frame by encoder
Front strip speed and the strip speed after encoder records the first frame of strip steel after frame；Described
Two strip speeds include by laser velocimeter record before frame the strip speed before the second frame of strip steel and
Strip speed after laser velocimeter records the second frame of strip steel after frame.
Further, method compared with described first strip speed for described second strip speed is:
If the strip speed before described second frame is not existed compared with the strip speed before described first frame
In described critical value range, or the strip speed after described second frame and the strip speed after described first frame
Compare not in described critical value range, the strip speed before described first frame and the strip steel after described first frame are transported
Scanning frequency degree is strip speed.
Further, the described marginal value setting is as 20mpm.
Further, shown in the described method such as formula (1) being calculated the actual smooth elongation percentage of strip steel:
δ=(vex-ven)/ven(1)
Wherein: vexFor strip speed before frame, unit mpm；venFor strip speed after frame, unit mpm, δ is smooth prolonging
Stretch rate, unit %.
The system and method for the control cold rolling levelling elongation percentage that the present invention provides, pass through encoder and laser velocimeter respectively
The speed of service of strip steel is measured, and enters row critical value and judge, can be needed according to production scene and emergency situations occur
Realize being precisely controlled of smooth elongation percentage afterwards, on the one hand can increase substantially smooth elongation control precision, still further aspect
Do not lose the original smooth elongation control function of encoder it is achieved that the effective of two kinds of control models combines and complementary, to subtracting yet
Less because of smooth elongation percentage defective products, the economic and social benefit increasing enterprise is significant.
Brief description
Fig. 1 is the method flow diagram controlling cold rolling levelling elongation percentage provided in an embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, a kind of system controlling cold rolling levelling elongation percentage provided in an embodiment of the present invention, including strip steel speed
Spend measurement module, judge that module calculated by selecting module and smooth extensibility meter；
Wherein, strip speed measurement module, is by encoder, the running speed of strip steel to be measured in real time, obtains
One strip speed, is measured to the running speed of described strip steel by laser velocimeter simultaneously in real time, obtains the second band
The steel speed of service；
Judge that described first strip speed is compared by selecting module with described second strip speed, if the
Compared with the first strip speed, in the critical value range setting, the second strip speed is two strip speeds
Strip speed, otherwise, the first strip speed is strip speed；
Smooth elongation percentage computing module, according to strip speed, is calculated the actual smooth elongation percentage of strip steel.
Wherein, the first strip speed includes recording before frame the strip steel before the first frame of strip steel by encoder
The speed of service and the strip speed after encoder records the first frame of strip steel after frame.Second strip steel runs speed
Degree includes recording the strip speed before the second frame of strip steel before frame by laser velocimeter and passes through laser velocimeter
Instrument records the strip speed after the second frame of strip steel after frame.
In addition, present invention also offers a kind of method controlling cold rolling levelling elongation percentage, comprising the steps；
Step 101: by encoder, the running speed of strip steel is measured in real time, obtained the first strip speed,
By laser velocimeter, the running speed of described strip steel is measured in real time simultaneously, obtained the second strip speed；
Step 102: the first strip speed is compared with the second strip speed, if the second strip steel runs speed
Compared with the first strip speed, in the critical value range setting, the second strip speed is strip speed to degree,
Otherwise, the first strip speed is strip speed；
Step 103: according to strip speed, be calculated the actual smooth elongation percentage of strip steel.
In embodiments of the present invention, there is provided a kind of concrete method controlling cold rolling levelling elongation percentage, as follows:
Step 201: by encoder, the running speed of strip steel is measured in real time, obtained the first strip speed,
Wherein, the first strip speed includes recording before frame the strip speed before the first frame of strip steel by encoder
With the strip speed being recorded after frame by encoder after the first frame of strip steel；Pass through laser velocimeter to institute simultaneously
The running speed stating strip steel is measured in real time, obtains the second strip speed, and wherein, the second strip speed includes leading to
Cross the strip speed before laser velocimeter records the second frame of strip steel before frame and by laser velocimeter in frame
Record the strip speed after the second frame of strip steel afterwards；
In embodiments of the present invention, if the strip speed before the first frame is 100mpm, the strip steel after the first frame
The speed of service is 101mpm, and the strip speed before the second frame is 100mpm, and the strip speed after the second frame is
140mpm.
Step 202: the first strip speed is compared with the second strip speed, if the second strip steel runs speed
Compared with the first strip speed, in the critical value range setting, the second strip speed is strip speed to degree,
Otherwise, the first strip speed is strip speed, and wherein, the marginal value that sets is as 20mpm；
By contrast, the strip speed 39mpm bigger than the strip speed after the first frame after the second frame, exceedes
The marginal value setting, therefore, using the strip speed before the first frame and the strip speed after the first frame as band
The steel speed of service.
Step 203: according to strip speed, be calculated the actual smooth elongation percentage of strip steel, wherein, be calculated strip steel
Shown in the method such as formula (1) of actual smooth elongation percentage:
δ=(vex-ven)/ven(1)
Wherein: vexFor strip speed before frame, unit mpm；venFor strip speed after frame, unit mpm, δ is smooth prolonging
Stretch rate, unit %.
It is computed, the actual smooth elongation percentage 1% of strip steel.
In addition, the system and method controlling cold rolling levelling elongation percentage provided in an embodiment of the present invention, certain is cold rolling for domestic
After factory 1850 continuous annealing unit, within this unit smooth elongation control error is down to 4% by 12%, because smooth elongation control is asked
Inscribe led to defective products and be down to 100 tons/month by 900 tons/month of early stage, bring considerable economic benefit for this enterprise.
The smooth elongation percentage measurement of skin pass mill group both at home and abroad relies primarily on encoder at idler roller before and after planisher and detects
Numerical computations, control form is: strip steel → jockey pulley → encoder → elongation control system, but due to actual production process
In as jockey pulley roll neck difference or jockey pulley and strip steel between skidding the problems such as cannot eliminate, directly result in the detection of actual elongation percentage
There is very big error, certain cold rolling mill domestic reaches more than 900 tons/moon because of the defective products that this problem causes.
Under the background that current encoder device controls smooth elongation percentage mode error cannot eliminate, laser velocimeter just meets
This requirement, this device has the advantages that the scan period is short, certainty of measurement is high, good stability, accurately can adjust roll-force,
But domestic and international skin pass mill group has no the precedent controlling smooth elongation percentage using laser velocimeter, and therefore how to realize can precision
Control smooth elongation percentage, and do not abandon the original smooth elongation control function of encoder, realize the effective of the two and combine and mutual
Mend, be that each cold rolling mill needs the urgent a great problem solving both at home and abroad at present.
The present invention is measured to the speed of service of strip steel by encoder and laser velocimeter respectively, and carries out critical
Value judges, can be needed according to production scene and occur realizing being precisely controlled of smooth elongation percentage after emergency situations, on the one hand can
Increase substantially smooth elongation control precision, still further aspect does not lose the original smooth elongation control function of encoder yet,
Achieve the effective of two kinds of control models to combine and complementary, to reduce the economy increasing enterprise because of smooth elongation percentage defective products and
Social benefit is significant.
It should be noted last that, above specific embodiment only in order to technical scheme to be described and unrestricted,
Although being described in detail to the present invention with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent, without deviating from the spirit and scope of technical solution of the present invention, it all should be covered
In the middle of scope of the presently claimed invention.
Claims (5)
1. a kind of control cold rolling levelling elongation percentage system it is characterised in that: include strip speed measurement module, judge select mould
Module calculated by block and smooth extensibility meter；
Wherein, described strip speed measurement module, is measured in real time to the running speed of strip steel by encoder, is obtained first
Strip speed, is measured to the running speed of described strip steel by laser velocimeter simultaneously in real time, obtains the second strip steel
The speed of service；
Described first strip speed is compared by described judgement selecting module with described second strip speed, if
In the critical value range setting, described second strip speed is strip speed, and otherwise, described first strip steel runs speed
Spend for strip speed；
Smooth elongation percentage computing module, according to described strip speed, is calculated the actual smooth elongation percentage of strip steel；
Described first strip speed includes recording the operation of the strip steel before the first frame of strip steel before frame by encoder
Speed and the strip speed after encoder records the first frame of strip steel after frame；Described second strip steel runs speed
Degree includes recording the strip speed before the second frame of strip steel before frame by laser velocimeter and passes through laser velocimeter
Instrument records the strip speed after the second frame of strip steel after frame；
The described marginal value setting is as 30-40mpm.
2. system according to claim 1 it is characterised in that: the described method being calculated the actual smooth elongation percentage of strip steel
As shown in formula (1):
δ=(vex-ven)/ven(1)
Wherein: vexFor strip speed before frame, unit mpm；venFor strip speed after frame, unit mpm, δ is smooth elongation percentage,
Unit %.
3. a kind of method controlling cold rolling levelling elongation percentage is it is characterised in that comprise the steps；
By encoder, the running speed of strip steel is measured in real time, obtained the first strip speed, passed through laser simultaneously
Tachymeter is measured in real time to the running speed of described strip steel, obtains the second strip speed；
Described first strip speed is compared with described second strip speed, if in the critical value range setting
Interior, described second strip speed is strip speed, and otherwise, described first strip speed runs speed for strip steel
Degree；
According to described strip speed, it is calculated the actual smooth elongation percentage of strip steel；
Described first strip speed includes recording the operation of the strip steel before the first frame of strip steel before frame by encoder
Speed and the strip speed after encoder records the first frame of strip steel after frame；Described second strip steel runs speed
Degree includes recording the strip speed before the second frame of strip steel before frame by laser velocimeter and passes through laser velocimeter
Instrument records the strip speed after the second frame of strip steel after frame；
Method compared with described first strip speed for described second strip speed is:
If the strip speed before described second frame is compared with the strip speed before described first frame not described
In critical value range, or the strip speed after described second frame is compared with the strip speed after described first frame
Not in described critical value range, the strip speed before described first frame and the strip steel after described first frame run speed
Degree is strip speed.
4. method according to claim 3 is it is characterised in that the described marginal value setting is as 20mpm.
5. according to the arbitrary described method of claim 3 to 4 it is characterised in that described be calculated the actual smooth extension of strip steel
Shown in the method for rate such as formula (1):
δ=(vex-ven)/ven(1)
Wherein: vexFor strip speed before frame, unit mpm；venFor strip speed after frame, unit mpm, δ is smooth elongation percentage,
Unit %.
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| CN107201477A (en) * | 2016-10-11 | 2017-09-26 | 宝钢集团新疆八钢铁有限公司 | A kind of cold-rolling production process of the zinc-plated door-plate steel of deep-draw |
| CN107520256B (en) * | 2017-09-12 | 2019-07-02 | 首钢集团有限公司 | The control method of smooth elongation percentage during a kind of planisher start and stop vehicle |
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