CN108202085B - The board thickness control apparatus of cold continuous rolling - Google Patents
The board thickness control apparatus of cold continuous rolling Download PDFInfo
- Publication number
- CN108202085B CN108202085B CN201710199909.8A CN201710199909A CN108202085B CN 108202085 B CN108202085 B CN 108202085B CN 201710199909 A CN201710199909 A CN 201710199909A CN 108202085 B CN108202085 B CN 108202085B
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- rack
- plate thickness
- side plate
- thickness
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- 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
- B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention provides a kind of board thickness control apparatus of cold continuous rolling, even if the plate thickness for being also able to suppress the entrance side of final rack changes in the case where the entrance side of final rack is not provided with plate thickness meter, the precision of product plate thickness is sought to improve.The board thickness control apparatus of cold continuous rolling has quality stream plate thickness calculation part (41) and the second strip thickness control portion (42).Quality stream plate thickness calculation part (41) calculates the quality stream plate thickness of the entrance side of the n-th rack (5) according to the outlet side plate thickness measured value by outlet side plate thickness meter (10) metering, the outlet side plate speed measured value by outlet side plate speedometer (9) metering and the entrance side plate speed measured value by entrance side plate speedometer (8) metering.Second strip thickness control portion (42) controls the rolling load in the (n-1)th rack (4), so that consistent with the entrance side plate thickness target value of the n-th rack (5) by the quality stream plate thickness that quality stream plate thickness calculation part (41) calculates.
Description
Technical field
The present invention relates to a kind of board thickness control apparatus of cold continuous rolling, more particularly to work that metal etc. is rolled
Sequence in relation to and for by rolled piece control at desired plate thickness cold continuous rolling board thickness control apparatus.
Background technique
In recent years, the precision prescribed of the plate thickness of rolled piece is continuously improved.Especially in electromagnetic steel plate, due to electronic in manufacture
Steel plate is laminated when machine or transformer, it is therefore necessary to carry out high-precision strip thickness control.
In general, being provided with multiple plate thickness meters, plate speedometer and tensometer in cold continuous rolling, plate thickness is controlled
System, so that becoming specified product plate thickness.Various board thickness control apparatus have been had developed before this.
Such as have feed-forward AGC (Automatic Gauge Control: automatic thickness control), use rack entrance side
Plate thickness meter, the working roll circumference of roll gap or plate thickness meter upstream side or downstream side to plate thickness meter downstream side frame
Speed is operated, so that outlet side plate thickness becomes target plate thickness.
In addition, the plate thickness meter of rack outlet side is used there are also Monitor Process, so that measured value becomes target plate thickness
Mode, roll gap to the plate thickness meter upstream side frame or working roll peripheral speed of the rack of upstream one changes again
To control plate thickness.About Monitor Process, due to there is distance between rack and thickness gauge and measurement delay, it is difficult high-precision
Ground controls plate thickness.
Then there is a kind of quality stream AGC, using the plate thickness meter for being set to rack entrance side and be set to rack entrance
Side, outlet side plate speedometer, the working roll peripheral speed of roll gap or upstream side frame to rack changes, so that root
Become target plate thickness according to the calculated quality stream plate thickness of quality stream rule.
In addition, there are also a kind of modes of roll gap for controlling rack in No. 4818890 bulletins of Japanese Patent No., with height response
For the purpose of ground controls the localized variation of the deformation drag of base material, rolling load and the curved power of rod are measured in final rack, and utilize
Milling train elasticity formula calculates the outlet side plate thickness of final rack, in a manner of making outlet side plate thickness calculated value become target plate thickness,
The roll gap of rack is controlled.In this mode, by be by tension-proof it is certain, come prevent close roll gap when tension drop
The increase of rolling load caused by low.
In general, these strip thickness controls are suitable for multiple racks, the high precision int of product plate thickness is realized.
Existing technical literature:
Patent document:
Patent document 1: No. 4818890 bulletins of Japanese Patent No.
As described above, being useful in multiple racks by combining the board thickness control apparatus proposed before this, plate is thus improved
Thick precision.But there is a problem of as follows.
At high price due to sensors such as plate thickness meter, plate speedometer, tensometers, whole racks may not necessarily be set
Outlet side and outlet side limit the number of units that can be arranged sometimes in order to inhibit expense.
In general, having to carry out high-precision control to plate thickness in initial rack in cold continuous rolling, also configure
There are many sensors.But such as have outlet side and outlet side arranging plate speedometer and tensometer in final rack, going out
Mouth side arranging plate thickness gauge, and plate thickness meter is not provided in the entrance side of final rack.
If this sensor configuration, above-mentioned feed-forward AGC, quality stream AGC can not be just applicable in, and be applicable in Monitor Process.Due to
Material is harder in downstream rack, therefore, when being the strip thickness control operated to roll gap, has rolling load and gets higher and send out
The danger of raw shape defect.Therefore, in the case where being applicable in Monitor Process in final rack, usually to the upstream one of final rack
The working roll peripheral speed of a rack is operated.In the case where this composition, as long as usually high-precision in initial rack
Degree ground control plate thickness, it will be able to accurately control into the product plate thickness of target.
Coefficient of friction but in the rolling that can roll the thin material near minimum plate thickness, in the roller aperture type of downstream rack
It is significantly changed due to mill speed, rolling load changes, and thus the plate thickness of rack outlet side changes.Therefore, not
In the case where the entrance side plate thickness that can control final rack, the plate thickness of final rack entrance side is changed according to mill speed, from
And reduce the plate thickness precision of final rack outlet side.
In the configuration of this sensor, it is also considered that when being applicable in the strip thickness control of above-mentioned No. 4818890 bulletins of Japanese Patent No.
The case where, but in the rolling that can roll the thin material near minimum plate thickness, that is, roll gap is turned off, only rolling load is got higher,
In the case that rolling load reaches upper control limit, desired plate thickness is not ensured that.In addition, reaching target even if as described above
Also because of high load capacity shape defect may occur for plate thickness.
Summary of the invention
The present invention was completed to solve the above problem, even if the entering in final rack its purpose is to provide one kind
In the case that mouth side does not have plate thickness meter, the plate of the cold continuous rolling of the outlet side plate thickness of final rack also can be accurately controlled
Thick control device.
In order to achieve the above object, the board thickness control apparatus of cold continuous rolling of the present invention is constituted as follows.
Cold continuous rolling has n (natural number that n is 2 or more) seat rolling machine frame.N-th rack is with rolling to rolled piece
The n-th working roll final rack.The upstream of the n-th rack is arranged in (n-1)th rack, has n-th-rolled to rolled piece
1 working roll and the (n-1)th speed control unit that the peripheral speed of the (n-1)th working roll is controlled.
In addition, cold continuous rolling has outlet side plate thickness meter, outlet side plate speedometer and entrance side plate speedometer.Outlet
Side plate thickness meter measures the plate thickness of the rolled piece of the outlet side of the n-th rack.Export the outlet side of side plate speedometer the n-th rack of metering
The plate speed (travelling speed) of rolled piece.The plate speed that entrance side plate speedometer measures the rolled piece of the entrance side of the n-th rack (transports speed
Degree).
Board thickness control apparatus has the first strip thickness control portion, quality stream plate thickness calculation part and the second strip thickness control portion.
First strip thickness control portion is Monitor Process, makes to export the metering of side plate thickness meter to the (n-1)th speed control unit feedback
Outlet side plate thickness measured value and the n-th rack outlet side plate thickness target value differential be bordering on 0 speed change values.
Quality stream plate thickness calculation part according to the outlet side plate thickness measured value measured by outlet side plate thickness meter, by outlet side plate
The outlet side plate speed measured value of speedometer metering and the entrance side plate speed measured value measured by entrance side plate speedometer,
The quality stream plate thickness of the entrance side of n-th rack is calculated.
Second strip thickness control portion controls the rolling load in the (n-1)th rack, so that by quality stream plate thickness calculation part
The quality stream plate thickness of calculating and the entrance side plate thickness target value of the n-th rack are consistent.The entrance side plate of final rack is controlled in this way
It is thick.
Preferably, cold continuous rolling has the n-th -2 rack in the upstream of the (n-1)th rack, n-th -2 rack have pair
The n-th -2 working roll that rolled piece is rolled and the n-th -2 speed control that the peripheral speed of the n-th -2 working roll is controlled
Device.In addition, the quality that the second strip thickness control portion calculates quality stream plate thickness calculation part to the n-th -2 speed control unit feedback
The differential of the entrance side plate thickness target value of flowing plate thickness and the n-th rack is bordering on 0 speed change values, to the rolling in the (n-1)th rack
Load is controlled.
Preferably, there is the (n-1)th rack the (n-1)th press control controlled the roll gap of the (n-1)th working roll to fill
It sets.In addition, the quality stream that the second strip thickness control portion calculates quality stream plate thickness calculation part to the (n-1)th press control device feedback
The differential of the entrance side plate thickness target value of plate thickness and the n-th rack is bordering on 0 roll gap change values, negative to the rolling in the (n-1)th rack
Lotus is controlled.
According to one method of the present invention, the (n-1)th rack has the controlled the roll gap of the (n-1)th working roll
N-1 press control device.Cold continuous rolling has the n-th -2 rack in the upstream of the (n-1)th rack, n-th -2 rack have pair
The n-th -2 working roll that rolled piece is rolled.In addition, board thickness control apparatus has rack entrance side plate thickness calculation part and third plate
Thick control unit.
Rack entrance side plate thickness calculation part according to the rolling load measured value measured by the (n-1)th press control device, by
The working roll peripheral speed of n-1 speed control unit metering and the quality stream plate thickness calculated by quality stream plate thickness calculation part,
The plate thickness of the entrance side of (n-1)th rack is calculated.
Third strip thickness control portion controls the rolling load in the n-th -2 rack, so that by rack entrance side plate thickness meter
The plate thickness calculated value that calculation portion calculates is consistent with the entrance side plate thickness target value of the (n-1)th rack.Control in this way than final rack to
The entrance side plate thickness for the rack that upstream is one.
Preferably, cold continuous rolling has the n-th -3 rack in the upstream of the n-th -2 rack, n-th -3 rack have pair
The n-th -3 working roll that rolled piece is rolled and the n-th -3 speed control that the peripheral speed of the n-th -3 working roll is controlled
Device.In addition, third strip thickness control portion calculates rack entrance side plate thickness calculation part to the n-th -3 speed control unit feedback
The differential of the entrance side plate thickness target value of plate thickness calculated value and the (n-1)th rack is bordering on 0 speed change values, to the n-th -2 rack
In rolling load controlled.
Preferably, there is the n-th -2 rack the n-th -2 press control controlled the roll gap of the n-th -2 working roll to fill
It sets.In addition, the plate that third strip thickness control portion calculates rack entrance side plate thickness calculation part to the n-th -2 press control device feedback
The differential of the entrance side plate thickness target value of thick calculated value and the (n-1)th rack is bordering on 0 roll gap change values, in the n-th -2 rack
Rolling load controlled.
Invention effect:
The board thickness control apparatus for the cold continuous rolling being related to according to the present invention, even if in the entrance of final rack (the n-th rack)
In the case that side is not provided with plate thickness meter, the entrance side plate thickness for being also able to suppress final rack changes, and is able to suppress final machine
The outlet side plate thickness of frame changes, and therefore, the outlet side plate thickness of final rack can accurately be controlled to the target plate thickness for product.
In turn, by inhibiting the plate thickness of the entrance side of one rack (the (n-1)th rack) upstream than final rack to change, will compare
The outlet side strip thickness control of final rack upstream one rack is desired plate thickness, and thereby, it is possible to inhibit from more upstream
Thickness deviation can more precisely control the outlet side plate thickness of final rack.
Detailed description of the invention
Fig. 1 is the figure for illustrating the structure of cold continuous rolling thickness control system that embodiments of the present invention 1 are related to.
Fig. 2 is the figure for illustrating the variation of cold continuous rolling thickness control system that embodiments of the present invention 1 are related to.
Fig. 3 is the figure for illustrating the structure of cold continuous rolling thickness control system that embodiments of the present invention 2 are related to.
Fig. 4 is the figure for illustrating the variation of cold continuous rolling thickness control system that embodiments of the present invention 2 are related to.
Fig. 5 is the signal for showing the hardware configuration example of processing circuit possessed by board thickness control apparatus of the present invention
Figure.
Specific embodiment
Hereinafter, the embodiment of the present invention will be described in detail referring to attached drawing.Further more, being wanted to common in each figure
Element marks identical symbol and the repetitive description thereof will be omitted.
Embodiment 1
<system structure>
Fig. 1 is the figure for illustrating the structure of cold continuous rolling thickness control system that embodiments of the present invention 1 are related to.Implement
The cold continuous rolling that mode 1 is related to has multiple rolling machine frames.The cold continuous rolling for having 5 rolling machine frames is described in Fig. 1.
5 rolling machine frames are followed successively by the first rack 1, the second rack 2, third rack 3, the 4th rack 4 from the upstream side
With the 5th rack 5.5 rolling machine frames roll rolled piece 6 to direction 7 (Fig. 1 is from left to right).
Each rack has working roll, speed control unit and press control device.Specifically, (i is nature to the i-th rack
Number, and i≤n, n=5) include the i-th working roll of a pair (11~15) rolled to rolled piece 6；To the circumference of the i-th working roll
The i-th speed control unit (21~25) that speed is controlled；And to the i-th pressure that the roll gap of the i-th working roll is controlled
Control device (31~35).In addition, the i-th speed control unit measures the peripheral speed of the i-th working roll.I-th pressure control
Load, the i.e. rolling load that device processed is subject to the i-th working roll from rolled piece 6 measures.
In addition, the cold continuous rolling that embodiment 1 is related to has entrance side plate speedometer 8, outlet side plate speedometer 9 and outlet
Side plate thickness meter 10.The rolled piece 6 of the entrance side of 8 pairs of entrance side plate speedometer the 5th racks 5 (the n-th rack) as final rack
Plate speed (travelling speed) measured.Side plate speedometer 9 is exported to the rolled piece 6 of the outlet side of the 5th rack 5 (the n-th rack)
Plate speed (travelling speed) measured.Side plate thickness meter 10 is exported to the rolled piece of the outlet side of the 5th rack 5 (the n-th rack)
6 plate thickness is measured.Further more, the cold continuous rolling that embodiment 1 is related to is not provided with plate thickness in the entrance side of final rack
Meter.
Board thickness control apparatus of the present invention is suitable for being not provided with the cold of plate thickness meter in the entrance side of final rack
Tandem mill.The board thickness control apparatus that embodiment 1 is related to has the first strip thickness control portion 40, quality stream plate thickness calculation part 41 and
Two strip thickness control portions 42.
<the first strip thickness control portion (Monitor Process)>
First strip thickness control portion 40 is functioned as Monitor Process.First strip thickness control portion 40 is received by outlet side plate thickness
The outlet side plate thickness measured value of 10 metering of degree meter and the outlet side plate thickness target value of the 5th rack 5 (the n-th rack).First plate thickness control
Portion 40 processed makes to export the thick and solid measured value of side plate and outlet side to fourth speed control device 24 (the (n-1)th speed control unit) feedback
The differential of plate thickness target value is bordering on 0 speed change values, so that outlet side plate thickness measured value is consistent with outlet side plate thickness target value.
By changing the working roll peripheral speed of the 4th rack 4, to make the tension variation between the 4th rack 4 and the 5th rack 5, thus
Control the plate thickness of the outlet side of the 5th rack 5.
Specifically, being greater than going out for the 5th rack 5 in the outlet side plate thickness measured value measured by outlet side plate thickness meter 10
In the case where mouth side plate thickness target value, the first strip thickness control portion 40 is sent to fourth speed control device 24 reduces working roll circumference
The speed change values of speed.In addition, in the case where outlet side plate thickness measured value is less than outlet side plate thickness target value, the first plate thickness
Control unit 40 sends the speed change values for improving working roll peripheral speed to fourth speed control device 24.Further more, outlet side plate
The difference of thick and solid measured value and outlet side plate thickness target value is bigger, and the absolute value of speed change values is bigger.
But influenced since product plate thickness is changed by the outlet side plate thickness of the 4th rack 4, in order to accurately
Control is the product plate thickness as target value, needs to inhibit the variation of the outlet side plate thickness of the 4th rack 4.
Hereinafter, to being arranged for the variation for inhibiting the outlet side plate thickness of the 4th rack 4, being shown in the dotted line of Fig. 1
Quality stream plate thickness calculation part 41 and the second strip thickness control portion 42 be illustrated.
<quality stream plate thickness calculation part>
Quality stream plate thickness calculation part 41 receives the outlet side plate thickness measured value measured by outlet side plate thickness meter 10, by exporting
The outlet side plate speed measured value and the entrance side plate speed reality measured by entrance side plate speedometer 8 that side plate speedometer 9 measures
Measured value.Quality stream plate thickness calculation part 41 substitutes into these measured values in following formula (1), calculates 4 (the (n-1)th machine of the 4th rack
Frame) outlet side quality stream plate thickness.Calculated quality stream plate thickness is sent to the second strip thickness control portion 42.Further more, the 4th
The outlet side quality stream plate thickness of rack 4 means the quality stream plate thickness of the entrance side of the 5th rack 5 (the n-th rack).
[mathematical expression 1]
Here,
The quality stream plate thickness of the outlet side of 4th rack 4
The plate thickness measured value [mm] of the outlet side of 5th rack 5
The plate speed measured value [mpm] of the outlet side of 4th rack 4
The plate speed measured value [mpm] of the outlet side of 5th rack 5
<the second strip thickness control portion (Monitor Process)>
Second strip thickness control portion 42 is received by the matter of the outlet side of calculated 4th rack 4 of quality stream plate thickness calculation part 41
It is thick to measure flowing plate.Second strip thickness control portion 42 makes quality stream to third speed control device 23 (the n-th -2 speed control unit) feedback
The differential of the outlet side plate thickness target value (the entrance side plate thickness target value of the 5th rack 5) of plate thickness and the 4th rack 4 is bordering on 0 speed
Change values are spent, so that outlet side plate thickness target value (the entrance side plate thickness mesh of the 5th rack 5 of quality stream plate thickness and the 4th rack 4
Scale value) unanimously, to control the rolling load in the 4th rack 4 (the (n-1)th rack).
Specifically, the quality stream plate thickness in the outlet side of the 4th rack 4 calculated by quality stream plate thickness calculation part 41 is big
In the case where the outlet side plate thickness target value of the 4th rack 4, the second strip thickness control portion 42 is sent out to third speed control device 23
Send the speed change values for reducing working roll peripheral speed.By reducing the working roll peripheral speed of third rack 3, third rack 3
And the 4th tension between rack 4 increases, and can reduce the rolling load in the 4th rack 4.As a result, it is possible to make the 5th rack
The plate thickness of the rolled piece 6 of 5 entrance side is thinning.
In addition, the quality stream plate thickness in the outlet side by calculated 4th rack 4 of quality stream plate thickness calculation part 41 is less than
In the case where the outlet side plate thickness target value of 4th rack 4, the second strip thickness control portion 42 is sent to third speed control device 23
Improve the speed change values of working roll peripheral speed.By improving the working roll peripheral speed of third rack 3,3 He of third rack
Tension between 4th rack 4 is reduced, and can be improved the rolling load in the 4th rack 4.As a result, it is possible to make the 5th rack 5
The plate thickness of rolled piece 6 of entrance side thicken.Further more, the difference of quality stream plate thickness and outlet side plate thickness target value is bigger, speed change
The absolute value of value is bigger.
<effect>
As described above, the board thickness control apparatus that embodiment according to the present invention 1 is related to, even if entering in final rack
In the case that mouth side does not have plate thickness meter, the plate thickness for being also able to suppress the entrance side of the 5th rack 5 changes, and can reduce the 5th
The plate thickness of the outlet side of rack 5 changes, and therefore, the outlet side plate thickness of the 5th rack 5 can accurately be controlled to the mesh for product
Target is thick.
<variation>
Referring to Fig. 2, the variation of embodiment 1 is illustrated.Fig. 2 is for illustrating that embodiments of the present invention 1 relate to
And cold continuous rolling thickness control system variation figure.In above embodiment 1, by being incited somebody to action by the second strip thickness control portion 42
Speed change values feed back to third speed control device 23, control the rolling load in the 4th rack 4.But in the 4th rack 4
The control method of rolling load be not limited to this.It is also possible to the second strip thickness control portion 42 to the 4th press control device 34
(the (n-1)th press control device) feedback make the outlet side plate thickness target value of quality stream plate thickness and the 4th rack 4 (the 5th rack 5
Entrance side plate thickness target value) differential be bordering on 0 roll gap change values, to the rolling load in the 4th rack 4 (the (n-1)th rack)
It is controlled.Further more, the point is also the same in the following embodiments.
Specifically, the quality stream plate thickness in the outlet side of the 4th rack 4 calculated by quality stream plate thickness calculation part 41 is big
In the case where the outlet side plate thickness target value of the 4th rack 4, the second strip thickness control portion 42 is sent out to the 4th press control device 34
Send the roll gap change values for reducing roll gap.In addition, in the case where quality stream plate thickness is less than outlet side plate thickness target value, the second plate thickness
Control unit 42 sends the roll gap change values for expanding roll gap to the 4th press control device 34.Further more, quality stream plate thickness and outlet side
The difference of plate thickness target value is bigger, and the absolute value of roll gap change values is bigger.
In addition, in the system of above embodiment 1, to suitable for the cold continuous rolling being made of 5 rolling machine frames
Situation is illustrated, but the quantity of rolling machine frame is not limited to 5.Further more, the point is also the same in the following embodiments.
Embodiment 2
<system structure>
In the following, being illustrated referring to Fig. 3 to embodiments of the present invention 2.Fig. 3 is for illustrating embodiment party of the invention
The figure of the structure for the cold continuous rolling thickness control system that formula 2 is related to.System structure shown in Fig. 3 is in addition to additional organic frame entrance side plate
It is same as Fig. 1 other than thick calculation part 43 and this point of third strip thickness control portion 44.
The system that embodiment 2 is related to is identical as the applicable object of embodiment 1, but in the outlet for calculating third rack 3
Side plate is thick and control is different for this point of target plate thickness.Hereinafter, being only illustrated to the movement different from embodiment 1.
<rack entrance side plate thickness calculation part>
Rack entrance side plate thickness calculation part 43 is received to be counted by the 4th press control device 34 (the (n-1)th press control device)
The rolling load measured value of amount, by the 4th rack 4 of fourth speed control device 24 (the (n-1)th speed control unit) metering
The quality stream plate thickness of the outlet side of working roll peripheral speed and the 4th rack 4 calculated by quality stream plate thickness calculation part 41.Machine
Frame entrance side plate thickness calculation part 43 substitutes into these values in following formula (2), calculates going out for third rack 3 (the n-th -2 rack)
The plate thickness of mouth side.Calculated plate thickness is sent to third strip thickness control portion 44.Further more, the plate thickness of the outlet side of third rack 3
Mean the plate thickness of the entrance side of the 4th rack 4 (the (n-1)th rack).
[mathematical expression 2]
Here,
The plate thickness calculated value [mm] of the outlet side of third rack 3
F: for seeking the function of the plate thickness of the outlet side of third rack 3
The rolling load measured value [mm] of 4th rack 4
The working roll peripheral speed [mpm] of 4th rack 4
The quality stream plate thickness [mm] of the outlet side of 4th rack 4
In general, the function of the outlet side plate thickness for seeking third rack 3 in formula (2) is with non-linear.
<third strip thickness control portion (Monitor Process)>
Third strip thickness control portion 44 is received by the calculated third rack 3 (n-th -2 of rack entrance side plate thickness calculation part 43
Rack) outlet side plate thickness calculated value.To second speed control device 22, (the n-th -3 speed control is filled in third strip thickness control portion 44
Set) feed back the outlet side plate thickness target value the (the 4th for making to export side plate thickness calculated value (entrance side plate thickness calculated value) and third rack 3
The entrance side plate thickness target value of rack 4) differential be bordering on 0 speed change values so that the outlet side plate thickness of third rack 3 calculates
It is worth the outlet side plate thickness target value (entrance of the 4th rack 4 of (the entrance side plate thickness calculated value of the 4th rack 4) and third rack 3
Side plate thickness target value) unanimously, to control the rolling load in third rack 3 (the n-th -2 rack).
Specifically, in the outlet side plate thickness calculating by the calculated third rack 3 of rack entrance side plate thickness calculation part 43
In the case that value is greater than the outlet side plate thickness target value of third rack 3, third strip thickness control portion 44 is to second speed control device
22 send the speed change values for reducing working roll peripheral speed.By reducing the working roll peripheral speed of the second rack 2, the second machine
Tension between frame 2 and third rack 3 increases, and can reduce the rolling load in third rack 3.As a result, it is possible to make the 4th
The plate thickness of the rolled piece 6 of the entrance side of rack 4 is thinning.
In addition, small in the outlet side plate thickness calculated value by the calculated third rack 3 of rack entrance side plate thickness calculation part 43
In the case where the outlet side plate thickness target value of third rack 3, third strip thickness control portion 44 is sent out to second speed control device 22
Send the speed change values for improving working roll peripheral speed.By improving the working roll peripheral speed of the second rack 2, the second rack 2
Tension between third rack 3 is reduced, and can be improved the rolling load in third rack 3.As a result, it is possible to make the 4th rack
The plate thickness of the rolled piece 6 of 4 entrance side thickens.Further more, the difference of outlet side plate thickness calculated value and outlet side plate thickness target value is bigger, speed
The absolute value for spending change values is bigger.
<effect>
As described above, the board thickness control apparatus that embodiment according to the present invention 2 is related to, even if entering in final rack
In the case that mouthful side does not have plate thickness meter, it is also able to suppress the entrance side of the 4th rack 4 caused by the variation because of mill speed
Plate thickness change, be able to suppress the entrance side of the 5th rack 5 plate thickness change, therefore, can be than embodiment 1 more precisely
Control the outlet side plate thickness of the 5th rack 5.
<variation>
Referring to Fig. 4, the variation of embodiment 2 is illustrated.Fig. 4 is for illustrating that embodiments of the present invention 2 relate to
And cold continuous rolling thickness control system variation figure.In above embodiment 2, by being incited somebody to action by third strip thickness control portion 44
Speed change values feed back to second speed control device 22, to control the rolling load in third rack 3.But third rack 3
In the control method of rolling load be not limited to this.It can also be from third strip thickness control portion 44 to third press control device 33
(the n-th -2 press control device) feedback makes the outlet for exporting side plate thickness calculated value (entrance side plate thickness calculated value) and third rack 3
The differential of side plate thickness target value (the entrance side plate thickness target value of the 4th rack 4) is bordering on 0 roll gap change values, thus to third machine
Rolling load in frame 3 (the n-th -2 rack) is controlled.
Specifically, in the outlet side plate thickness calculating by the calculated third rack 3 of rack entrance side plate thickness calculation part 43
In the case that value is greater than the outlet side plate thickness target value of third rack 3, third strip thickness control portion 44 is to third press control device
33 send the roll gap change values for reducing roll gap.In addition, by the calculated third rack 3 of rack entrance side plate thickness calculation part 43
In the case that outlet side plate thickness calculated value is less than the outlet side plate thickness target value of third rack 3, third strip thickness control portion 44 is to the
Three press control devices 33 send the roll gap change values for expanding roll gap.Further more, outlet side plate thickness calculated value and outlet side plate thickness mesh
The difference of scale value is bigger, and the absolute value of roll gap change values is bigger.
<hardware configuration example>
Fig. 5 is the signal for showing the hardware configuration example of processing circuit possessed by board thickness control apparatus of the present invention
Figure.First strip thickness control portion 40, quality stream plate thickness calculation part 41, the second strip thickness control portion 42, rack entrance side plate thickness calculation part
43, third strip thickness control portion 44 indicates a part of function possessed by board thickness control apparatus, and each function is by processing circuit Lai real
It is existing.For example, processing circuit has the processor 91 and the memory 92 of at least one of at least one.For example, processing circuit has
The specialized hardware 93 of at least one.As concrete example, processing circuit be PLC (Programmable Logic Controller:
Programmable logic controller (PLC)).
In the case where processing circuit has processor 91 and memory 92, pass through software, firmware or software and firmware
Combination realize each function.At least one party of software and firmware is described as program.At least one party of software and firmware is deposited
Storage is in memory 92.Processor 91 is by reading the program stored in memory 92 and being executed, to realize each function.Place
It manages device 91 and is also referred to as CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, Wei Chu
Manage device, microcomputer, DSP.For example, memory 92 is that RAM, ROM, flash memory, EPROM, EEPROM etc. are non-volatile
Or volatile semiconductor memory, disk, floppy disk, CD, compact disk, Mini Disk, DVD etc..
In the case where processing circuit has specialized hardware 93, processing circuit is such as single circuit, compound circuit, program
The processor after processor, concurrent program, ASIC, FPGA or their combination after change.For example, respectively with processing electricity
Each function is realized on road.For example, concentration realizes each function with processing circuit.
In addition, can also realize a part about each function with specialized hardware 93, realize other with software or firmware
Part.
Processing circuit realizes each function by hardware 93, software, firmware or their combination in this wise.
Symbol description
The-the five rack of the first rack of 1-5
6 rolled pieces
7 directions
8 entrance side plate speedometers
9 outlet side plate speedometers
10 outlet side plate thickness meters
The-the five speed control unit of 21-25 First Speed control device
The first press control of 31-35 the-the five press control device of device
40 first strip thickness control portions
41 quality stream plate thickness calculation parts
42 second strip thickness control portions
43 rack entrance side plate thickness calculation parts
44 third strip thickness control portions
91 processors
92 memories
93 hardware
Claims (6)
1. a kind of board thickness control apparatus of cold continuous rolling, which is characterized in that the cold continuous rolling has n rolling machine frames, wherein n
For 2 or more natural number,
The cold continuous rolling includes:
N-th rack is the final rack with the n-th working roll rolled to rolled piece；
The upstream of n-th rack is arranged in (n-1)th rack, have the (n-1)th working roll that the rolled piece is rolled and
The (n-1)th speed control unit that the peripheral speed of (n-1)th working roll is controlled；
Side plate thickness meter is exported, the plate thickness of the rolled piece of the outlet side of n-th rack is measured；
Side plate speedometer is exported, the plate speed of the rolled piece of the outlet side of n-th rack is measured；And
Entrance side plate speedometer measures the plate speed of the rolled piece of the entrance side of n-th rack,
The board thickness control apparatus includes:
First strip thickness control portion, the outlet that the (n-1)th speed control unit of Xiang Suoshu feedback measures the outlet side plate thickness meter
The differential of the outlet side plate thickness target value of the thick and solid measured value of side plate and n-th rack is bordering on 0 speed change values；
Quality stream plate thickness calculation part, according to by it is described outlet side plate thickness meter metering outlet side plate thickness measured value, by it is described go out
The outlet side plate speed measured value of mouth side plate speedometer metering and the entrance side plate speed measured by the entrance side plate speedometer
Measured value is spent, the quality stream plate thickness of the entrance side of n-th rack is calculated；And
Second strip thickness control portion controls the rolling load in (n-1)th rack, so that by the quality stream plate thickness
The quality stream plate thickness that calculation part calculates is consistent with the entrance side plate thickness target value of n-th rack.
2. the board thickness control apparatus of cold continuous rolling according to claim 1, which is characterized in that
The cold continuous rolling has the n-th -2 rack in the upstream of (n-1)th rack, which has rolls to described
The n-th -2 working roll and the n-th -2 speed control that the peripheral speed of n-th -2 working roll is controlled that part is rolled
Device processed,
Second strip thickness control portion calculates the quality stream plate thickness calculation part to n-th -2 speed control unit feedback
Quality stream plate thickness and n-th rack entrance side plate thickness target value differential be bordering on 0 speed change values, to described
Rolling load in n-1 rack is controlled.
3. the board thickness control apparatus of cold continuous rolling according to claim 1, which is characterized in that
(n-1)th rack has the (n-1)th press control device controlled the roll gap of (n-1)th working roll,
Second strip thickness control portion calculates the quality stream plate thickness calculation part to the (n-1)th press control device feedback
Quality stream plate thickness and n-th rack entrance side plate thickness target value differential be bordering on 0 roll gap change values, to described
Rolling load in n-1 rack is controlled.
4. according to claim 1 to 3 described in any item cold continuous rollings board thickness control apparatus, which is characterized in that
(n-1)th rack has the (n-1)th press control device controlled the roll gap of (n-1)th working roll,
The cold continuous rolling has the n-th -2 rack in the upstream of (n-1)th rack, which has rolls to described
The n-th -2 working roll that part is rolled,
The board thickness control apparatus includes:
Rack entrance side plate thickness calculation part, according to the rolling load measured value measured by the (n-1)th press control device, by
The working roll peripheral speed of the (n-1)th speed control unit metering and the matter calculated by the quality stream plate thickness calculation part
It is thick to measure flowing plate, the plate thickness of the entrance side of (n-1)th rack is calculated；And
Third strip thickness control portion controls the rolling load in n-th -2 rack, so that by the rack entrance side
The plate thickness calculated value that plate thickness calculation part calculates is consistent with the entrance side plate thickness target value of (n-1)th rack.
5. the board thickness control apparatus of cold continuous rolling according to claim 4, which is characterized in that
The cold continuous rolling has the n-th -3 rack in the upstream of n-th -2 rack, which has rolls to described
The n-th -3 working roll and the n-th -3 speed control that the peripheral speed of n-th -3 working roll is controlled that part is rolled
Device processed,
Third strip thickness control portion makes the rack entrance side plate thickness calculation part to n-th -3 speed control unit feedback
The differential of the entrance side plate thickness target value of the plate thickness calculated value of calculating and (n-1)th rack is bordering on 0 speed change values, right
Rolling load in n-th -2 rack is controlled.
6. the board thickness control apparatus of cold continuous rolling according to claim 4, which is characterized in that
N-th -2 rack has the n-th -2 press control device controlled the roll gap of n-th -2 working roll,
Third strip thickness control portion makes the rack entrance side plate thickness calculation part to n-th -2 press control device feedback
The differential of the entrance side plate thickness target value of the plate thickness calculated value of calculating and (n-1)th rack is bordering on 0 roll gap change values, right
Rolling load in n-th -2 rack is controlled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016246626A JP6627740B2 (en) | 2016-12-20 | 2016-12-20 | Thickness control device for tandem cold rolling mill |
| JP2016-246626 | 2016-12-20 |
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| Publication Number | Publication Date |
|---|---|
| CN108202085A CN108202085A (en) | 2018-06-26 |
| CN108202085B true CN108202085B (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710199909.8A Active CN108202085B (en) | 2016-12-20 | 2017-03-30 | The board thickness control apparatus of cold continuous rolling |
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| Country | Link |
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| JP (1) | JP6627740B2 (en) |
| CN (1) | CN108202085B (en) |
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| CN110807029B (en) * | 2019-09-26 | 2023-04-25 | 乳源东阳光优艾希杰精箔有限公司 | Hash mapping storage method and system for second flow thickness |
| CN110814049B (en) * | 2019-10-23 | 2021-09-21 | 首钢集团有限公司 | Method and device for controlling thickness of strip steel |
| US11845118B2 (en) | 2020-09-04 | 2023-12-19 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Control system of tandem cold rolling mill |
| CN114192587B (en) * | 2021-12-13 | 2022-09-13 | 东北大学 | Cold-rolled plate shape control parameter setting method based on error back propagation algorithm |
| CN114393033B (en) * | 2021-12-17 | 2024-04-05 | 天津市新宇彩板有限公司 | Rolling method for rolling 0.24mm ultrathin material by acid continuous rolling unit |
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| JPH07227611A (en) * | 1994-02-22 | 1995-08-29 | Nkk Corp | Board wave shape control method for continuous hot rolling mill |
| JP2008126305A (en) * | 2006-11-24 | 2008-06-05 | Nippon Steel Corp | Thickness control method in cold tandem rolling |
| CN101885003A (en) * | 2009-05-14 | 2010-11-17 | 株式会社日立制作所 | The control device of rolling equipment and control method |
| CN105363797A (en) * | 2014-08-19 | 2016-03-02 | 株式会社日立制作所 | Rolling control device and rolling control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127518A (en) * | 1981-01-29 | 1982-08-07 | Toshiba Corp | Plate thickness controlling device for tandem rolling mill |
| JP2547850B2 (en) * | 1989-07-13 | 1996-10-23 | 株式会社東芝 | Plate thickness controller for cold tandem rolling mill |
| JP2970264B2 (en) * | 1992-10-30 | 1999-11-02 | 株式会社日立製作所 | Thickness control device of tandem rolling mill |
| JP3826762B2 (en) * | 2001-10-29 | 2006-09-27 | Ｊｆｅスチール株式会社 | Thickness control method |
| JP6025553B2 (en) * | 2012-12-26 | 2016-11-16 | 株式会社日立製作所 | Rolling control device, rolling control method, and rolling control program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07227611A (en) * | 1994-02-22 | 1995-08-29 | Nkk Corp | Board wave shape control method for continuous hot rolling mill |
| JP2008126305A (en) * | 2006-11-24 | 2008-06-05 | Nippon Steel Corp | Thickness control method in cold tandem rolling |
| CN101885003A (en) * | 2009-05-14 | 2010-11-17 | 株式会社日立制作所 | The control device of rolling equipment and control method |
| CN105363797A (en) * | 2014-08-19 | 2016-03-02 | 株式会社日立制作所 | Rolling control device and rolling control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018099707A (en) | 2018-06-28 |
| JP6627740B2 (en) | 2020-01-08 |
| CN108202085A (en) | 2018-06-26 |
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