CN106862282B - A kind of fast mill electric drive control system - Google Patents
A kind of fast mill electric drive control system Download PDFInfo
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- CN106862282B CN106862282B CN201710098329.XA CN201710098329A CN106862282B CN 106862282 B CN106862282 B CN 106862282B CN 201710098329 A CN201710098329 A CN 201710098329A CN 106862282 B CN106862282 B CN 106862282B
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- strip
- milling train
- train group
- speed
- dynamic
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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
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
- B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses fast mill electric drive control systems, including milling train group, for carrying out rolling processing to strip；DC speed regulation module is connect with milling train group signal, for completing the setting of system operational parameters, controlling the co-ordination of milling train group all fronts motor and controlling the speed of milling train group, tension stability；Automation control module is connect with milling train group signal, is carried out for being monitored to milling train group, and according to the result of monitoring to milling train group adjust automatically；Programmable controller is connect with milling train group, DC speed regulation module and automation control module signal respectively, for being monitored control to milling train group, DC speed regulation module and automation control module；Fast mill electric drive control system of the invention is mainly made of DC speed regulation module, automation control module and programmable controller, modules can standardized production, to improve the universal standard of this system, reduces maintenance and control the complexity of program.
Description
Technical field
The present invention relates to electric control systems, and in particular to a kind of fast mill electric drive control system.
Background technique
Fast mill is all but the most of fast mill Electrified Transmission at present using electrical control by the way of mostly at present
The generally existing defect below of control system: 1, reliability is low, and maintenance is complicated；2, not expandability；3, programming is complicated, cannot make
With customized standard feature module；4, the not configurable I/O module for adapting to multi-signal characteristic；5, hardware design is not marked
Standard is unable to modularized production；6, self diagnostic capability is low, can not achieve the adjustment of self.
Fast mill in the process of work, since the tension of coiling machine often changes, passes so as to cause electrical
The reaction of system system is excessively slow, it is difficult to and guarantee the stability of fast mill during the work time, is easy to be influenced by human factor,
And then influence the processing quality of product.
Summary of the invention
In view of the deficiencies of the prior art, it is good and can realize self diagnosis to be intended to provide a kind of stability for the purpose of the present invention
Fast mill electric drive control system.
To achieve the above object, the present invention adopts the following technical scheme: a kind of fast mill electric drive control system, packet
It includes
Milling train group, for carrying out rolling processing to strip；
DC speed regulation module is connect with milling train group signal, and for completing the setting of system operational parameters, control milling train group is complete
The co-ordination of line motor is with 1 and controls the speed of milling train group, tension stability；
Automation control module is connect with milling train group signal, for being monitored to milling train group, and according to the result of monitoring
It carries out to milling train group adjust automatically；
Programmable controller connect with milling train group, DC speed regulation module and automation control module signal respectively, is used for
Control is monitored to milling train group, DC speed regulation module and automation control module；
Touch screen is connect with programmable controller signal, and completion and the communication of programmable controller, data are shown and failure
Inquiry.
The milling train group includes the coiling machine for carrying out rolling processing to strip, for detecting the local derviation of coiling machine speed
Roller, the motor for driving rectification roll to rotate are installed in rectification roll, use for controlling the ramp generator of reel tension
In the first increment code wheel that the revolving speed of rectification roll is switched to linear velocity, it is installed in machine shaft, for measuring rectification roll angle speed
Second increment code wheel of degree, and the integrator for reducing the variation disturbance of strip coil diameter.
The specific steps of the DC speed regulation module control milling train group tension stability are as follows:
S1, given tension
During coiling machine batches, the coiling tension size of strip is calculated strip by strip yield limit σ and thickness h
And it obtains, the coiling tension T=qbh=σ kbh of strip
Wherein: q is unit tensile stress, and σ is yield limit；K is design factor, and being worth is 0.2-0.8；B is strip width
mm；H is steel strip thickness mm；
S2, strip coil diameter calculate
The revolving speed of rectification roll is converted into actual linear velocity S by the first increment code wheel, and angular velocity omega r is rotated by being installed on motor
Second increment code wheel of axis shaft end measures, and obtains the practical coil diameter D=S/ ω r of strip；Then, integrator is practical to the strip obtained
Coil diameter D is filtered, and show that the final coil diameter value D 1=D+ Δ of strip, Δ are the variable quantity of strip coil diameter unit time；
S3, tension torque calculate
Set the rolling tensile force T of coiling machine, conversion to the torque on machine shaft are as follows:
MT=KD1T/2
In formula in uncoiling:When batching:
η, i are respectively transmission efficiency, reduction ratio；
S4, unloading torque compensation
According to the speed of coiler mandrel, unloading torque compensation is carried out to coiling machine；
S5, dynamic moment compensation calculate
The moment of accelerating calculation formula determined by strip coil diameter change of line speed dv, dt and coil diameter variation D-D0 is as follows:
The formula of dynamic compensation:
MIt is dynamic=MDynamic 1+MDynamic 2
Wherein:
MIt is dynamicFor total rotary inertia；
MDynamic 1For the rotary inertia of strip spool；
MDynamic 2For the rotary inertia of strip；
DNFor the diameter of coiler mandrel；
I is reduction ratio；
G is acceleration of gravity；
GDN 2For conversion to the flywheel inertia on motor moving axis, G is the equivalent gravity of load；
D0For the internal diameter of reel, rice；
B is strip width, millimeter；
G is load equivalent gravity；
K1Indicate the rotational inertia coefficient of fixed part；
ρ is strip density, kg/m3；
S is pack completeness when band batches, it has with volume layer compactness extent and coiling tension, value s=0.85-
0.90。
The touch screen is HMI touch screen.
Advantageous effect of the invention is:
Fast mill electric drive control system of the invention mainly by DC speed regulation module, automation control module and
Programmable controller composition, modules can standardized production to improve the universal standard of this system reduce dimension
The complexity of shield and control program；In addition, can control milling train group tension, velocity-stabilization by DC speed regulation module, eliminate
The influence for thinking factor ensure that the processing quality of product.
Detailed description of the invention
Fig. 1 is the system block diagram of fast mill electric drive control system of the present invention；
Fig. 2 is the schematic diagram that strip coil diameter calculates；
Fig. 3 is integrator working principle diagram；
Fig. 4 is dynamic friction curve；
In figure: 1, milling train group；2, DC speed regulation module；3, automation control module；4, programmable controller；5, it touches
Screen.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention:
As shown in Figure 1, fast mill electric drive control system of the present invention includes milling train group 1, for rolling to strip
System processing；DC speed regulation module 2 is connect with 1 signal of milling train group, for completing the setting of system operational parameters, controls milling train group 1
The co-ordination of all fronts motor and speed, the tension stability of control milling train group 1；Automation control module 3 is believed with milling train group 1
Number connection, carry out for being monitored to milling train group 1, and according to the result of monitoring to 1 adjust automatically of milling train group；PLC technology
Device 4 is connect with milling train group 1, DC speed regulation module 2 and 3 signal of automation control module respectively, for milling train group 1, direct current
Speed adjusting module 2 and automation control module 3 are monitored control；Touch screen 5 is connect with 4 signal of programmable controller, is completed
Communication, data with programmable controller 4 are shown and fault inquiry, and in the present embodiment, which is man-machine interface (Human
Machine Interface, HMI) touch screen.
Wherein, above-mentioned milling train group 1 includes the coiling machine for carrying out rolling processing to strip, for detecting coiling machine speed
The rectification roll of degree, the motor for driving rectification roll to rotate are installed on local derviation for controlling the ramp generator of reel tension
The first increment code wheel in roller, for the revolving speed of rectification roll to be switched to linear velocity, is installed in machine shaft, for measuring local derviation
Second increment code wheel of roller angular speed, and the integrator for reducing the variation disturbance of strip coil diameter.The DC speed regulation module
Control the specific steps of milling train group tension stability are as follows:
S1, given tension
For strip during coiling machine batches, coiling machine is when winding strip, it is necessary to have certain tension, and strip
Coiling tension size calculated by strip yield limit σ and thickness h and obtained, the coiling tension T=qbh=σ kbh of strip
Wherein: q is unit tensile stress, and σ is yield limit；K is design factor, and being worth is 0.2-0.8；B is strip width
mm；H is steel strip thickness mm；
S2, strip coil diameter calculate
The revolving speed of rectification roll is converted into actual linear velocity S by the first increment code wheel, and angular velocity omega r is rotated by being installed on motor
Second increment code wheel of axis shaft end measures, and the schematic diagram that strip coil diameter calculates is as shown in Fig. 2, practical coil diameter perimeter=π D=is practical
Linear velocity (S)=actual angular speed (ω r) x D, to obtain practical coil diameter D=S/ ω r, D ∝ the Line Speed of strip
(S)/Reel Speed (ω r) due to machinery etc. due to during the rolling process, causing the disturbance of speed, then necessarily causing
The variation of coil diameter disturbs, and therefore, in this step, integrator can be filtered the practical coil diameter of the strip being calculated, to subtract
Disturbance caused by few speed obtains final accurate coil diameter value D1, D1=D+ Δ；Wherein, the working principle of integrator such as Fig. 3 institute
Show, Δ is the variable quantity of strip coil diameter unit time, forms a ramp function generator, makes coil diameter increasing or decreasing at any time
Variation has the function of filtering, reduces disturbance caused by speed, obtains stable and accurate coil diameter value.
S3, tension torque calculate
Set the rolling tensile force T of coiling machine, conversion to the torque on machine shaft are as follows:
MT=KD1T/2
In formula in uncoiling:When batching:
η, i are respectively transmission efficiency, reduction ratio；
S4, unloading torque compensation
According to the speed of coiler mandrel, unloading torque compensation is carried out to coiling machine；Meeting when due to coiler mandrel operation
The rubbing actions such as machinery occur, electromagnetic torque can be lost, so this part needs to compensate, unloading torque compensation and speed are one
Nonlinear function, that is to say, that the value of unloading torque compensation at various speeds is different.In order to know frictional force and revolving speed
Relationship, it is thus necessary to determine that torque current when friction speed point, according to this no-load torque electric current calculate the speed point friction
Compensation rate, dynamic friction curve are as shown in Figure 4.
S5, dynamic moment compensation calculate
The moment of accelerating calculation formula determined by strip coil diameter change of line speed dv, dt and coil diameter variation D-D0 is as follows:
The formula of dynamic compensation:
MIt is dynamic=MDynamic 1+MDynamic 2
Wherein:
M moves as total rotary inertia；
MDynamic 1For the rotary inertia of strip spool；
M dynamic 2 is the rotary inertia of strip；
DNFor the diameter of coiler mandrel；
I is reduction ratio；
G is acceleration of gravity；
GDN 2For conversion to the flywheel inertia on motor moving axis, G is the equivalent gravity of load；
D0For the internal diameter of reel, rice；
B is strip width, millimeter；
G is load equivalent gravity；
K1Indicate the rotational inertia coefficient of fixed part；
ρ is strip density, kg/m3；
S is pack completeness when band batches, it has with volume layer compactness extent and coiling tension, value s=0.85-
0.90。
By the processing of above-mentioned several steps, the process in the initial coil diameter of strip to maximum (or minimum) coil diameter can be realized
In, actual tension and setting tension are constant always, to realize that constant tension coiling rolls, eliminate the influence for thinking factor, protect
The processing quality of product is demonstrate,proved.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
It is corresponding to change and deformation, and all these change and deformation all should belong to invention scope of protection of the claims it
It is interior.
Claims (3)
1. a kind of fast mill electric drive control system, which is characterized in that including
Milling train group, for carrying out rolling processing to strip；
DC speed regulation module is connect with milling train group signal, and for completing the setting of system operational parameters, control milling train group is completely electric
The co-ordination of machine and speed, the tension stability of control milling train group；
Automation control module is connect with milling train group signal, is carried out for being monitored to milling train group, and according to the result of monitoring
To milling train group adjust automatically；
Programmable controller is connect with milling train group, DC speed regulation module and automation control module signal respectively, for rolling
Unit, DC speed regulation module and automation control module are monitored control；
Touch screen is connect with programmable controller signal, and completion is shown with the communication of programmable controller, data and failure is looked into
It askes；
The specific steps of the DC speed regulation module control milling train group tension stability are as follows:
S1, given tension
Strip during coiling machine batches, the coiling tension size of strip calculated by strip yield limit σ and thickness h and
, the coiling tension T=qbh=σ kbh of strip；
Wherein: q is unit tensile stress, and σ is yield limit；K is design factor, and being worth is 0.2-0.8；B is strip width mm；H is
Steel strip thickness mm；
S2, strip coil diameter calculate
The revolving speed of rectification roll is converted into actual linear velocity S by the first increment code wheel, and angular velocity omega r is by being installed on motor rotation axis axis
The second increment code wheel measurement at end, obtains the practical coil diameter D=S/ ω r of strip；Then, integrator is to the practical coil diameter of the strip obtained
D is filtered, and obtains the final coil diameter value D of strip1=D+ Δ, Δ are the variable quantity of strip coil diameter unit time；
S3, tension torque calculate
Set the rolling tensile force T of coiling machine, conversion to the torque on machine shaft are as follows:
MT=KD1T/2
In formula, in uncoiling:When batching:
K is variation coefficient；
η, i are respectively transmission efficiency, reduction ratio；
S4, unloading torque compensation
According to the speed of coiler mandrel, unloading torque compensation is carried out to coiling machine；
S5, dynamic moment compensation calculate
D-D is changed by strip coil diameter change of line speed dv, dt and coil diameter0The moment of accelerating calculation formula of decision is as follows:
The formula of dynamic compensation:
MIt is dynamic=MDynamic 1+MDynamic 2
Wherein:
MIt is dynamicFor total rotary inertia；
MDynamic 1For the rotary inertia of strip spool；
MDynamic 2For the rotary inertia of strip；
DNFor the diameter of coiler mandrel；
I is reduction ratio；
G is acceleration of gravity；
GDN 2For conversion to the flywheel inertia on motor moving axis, G is the equivalent gravity of load；
D0For the internal diameter of reel, rice；
B is strip width, millimeter；
G is load equivalent gravity；
K1Indicate the rotational inertia coefficient of fixed part；
ρ is strip density, kg/m3；
S is pack completeness when band batches, it is related with volume layer compactness extent and coiling tension, value s=0.85-0.90.
2. fast mill electric drive control system as described in claim 1, which is characterized in that the milling train group includes being used for
The coiling machine that rolling processing is carried out to strip, the electricity for detecting the rectification roll of coiling machine speed, for driving rectification roll to rotate
Machine is installed in rectification roll, for controlling the ramp generator of reel tension for the revolving speed of rectification roll to be switched to linear velocity
The first increment code wheel, be installed in machine shaft, the second increment code wheel for measuring rectification roll angular speed, and for subtracting
The integrator of few strip coil diameter variation disturbance.
3. fast mill electric drive control system as described in claim 1, which is characterized in that the touch screen is HMI touching
Touch screen.
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| CN201710098329.XA CN106862282B (en) | 2017-02-22 | 2017-02-22 | A kind of fast mill electric drive control system |
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| CN108044822B (en) * | 2018-01-01 | 2019-07-26 | 宁波钜德精工机械有限公司 | The constant-tension control method of Buddha's warrior attendant wire cutting machine |
| CN109189112B (en) * | 2018-09-25 | 2023-06-06 | 辽宁工业大学 | Tension roller strip steel tension slip form control method and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62227514A (en) * | 1986-03-28 | 1987-10-06 | Sumitomo Metal Ind Ltd | Control method for reel motor of rolling mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202144407U (en) * | 2011-05-27 | 2012-02-15 | 南京双威生物医学科技有限公司 | Automatic rolling apparatus with constant tension force |
| CN102360930A (en) * | 2011-05-31 | 2012-02-22 | 艾默生网络能源有限公司 | System for automatically controlling winding tension of transformer coil |
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