CN107470370B - A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card - Google Patents
A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card Download PDFInfo
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- CN107470370B CN107470370B CN201710685707.4A CN201710685707A CN107470370B CN 107470370 B CN107470370 B CN 107470370B CN 201710685707 A CN201710685707 A CN 201710685707A CN 107470370 B CN107470370 B CN 107470370B
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- fashioned iron
- blooming mill
- card
- blooming
- rolls
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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
- B21B37/46—Roll speed or drive motor control
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- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a kind of control methods for preventing fashioned iron blooming mill main drive motor from persistently rolling card, belong to mill drive control technology field.Step of the invention is main are as follows: rolls card state determination unit by fashioned iron blooming mill stall type and determines whether fashioned iron blooming mill is in stall type and rolls card-like state, prevents from being under high current for a long time when fashioned iron blooming mill main drive motor stall；Card state determination unit is rolled by the non-stall type of fashioned iron blooming mill and determines whether fashioned iron blooming mill is in non-stall type and rolls card-like state, prevents the main transmission of fashioned iron blooming mill from rolling for a long time under follow current amplitude limit value with extremely low speed.This method efficiently avoids the main transmission of fashioned iron blooming mill the problem of seriously rolling the unhelpful operation from damage under card-like state.
Description
Technical field
The present invention relates to mill drive control technology fields, prevent fashioned iron cogging owner from passing more specifically to one kind
Dynamic motor persistently rolls the control method of card.
Background technique
Ma Gang great H profile steel production line is provided with 1 frame two-roller reversible formula fashioned iron blooming mill, fashioned iron blooming mill main transmission control system
System is mainly by a 5500KW synchronous motor and Siemens SINAMICS SL150 AC-AC frequency conversion transmission control device institute
Composition.For the fashioned iron blooming mill, during practical fashioned iron split rolling method, for various reasons (such as fashioned iron shaped blank (referred to as
Rolled piece) head shape is irregular, workpiece front end and pass misalign and the practical unloaded roll gap of blooming mill is too small etc.) fashioned iron opens
Base chance occurs rolling card accident, especially restores several leading rolled piece of rolling after roll change.
Summary of the invention
1. technical problems to be solved by the inivention
In view of the defects existing in the prior art with deficiency, the present invention provides one kind to prevent fashioned iron blooming mill main transmission electronic
Machine persistently rolls the control method of card, and it is unhelpful in the case where seriously rolling card-like state that this method efficiently avoids the main transmission of fashioned iron blooming mill
From the problem of damage operation.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card of the invention, the steps include:
Step 1: card state determination unit is rolled by fashioned iron blooming mill stall type and determines whether fashioned iron blooming mill is in stall
Type rolls card-like state, prevents from being under high current for a long time when fashioned iron blooming mill main drive motor stall；
Step 2: card state determination unit is rolled by the non-stall type of fashioned iron blooming mill and determines whether fashioned iron blooming mill is in non-
Stall type rolls card-like state, prevents the main transmission of fashioned iron blooming mill from rolling for a long time under follow current amplitude limit value with extremely low speed；
Step 3: fashioned iron blooming mill is determined in fashioned iron blooming mill surprise passage and occurs that stall type rolls card or non-stall type rolls card
When, the fashioned iron blooming mill main drive that fashioned iron blooming mill surprise passage rolls the enabled block control unit output of card main transmission enables item
Part is blocked, and is avoided fashioned iron blooming mill main transmission surprise passage long lasting in High-current output and is rolled card-like state；
Step 4: fashioned iron blooming mill is determined in fashioned iron blooming mill idol passage and occurs that stall type rolls card or non-stall type rolls card
When, the fashioned iron blooming mill main drive that fashioned iron blooming mill idol passage rolls the enabled block control unit output of card main transmission enables item
Part is blocked, and is avoided fashioned iron blooming mill main transmission idol passage long lasting in High-current output and is rolled card-like state.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card of the invention, in view of fashioned iron cogging
Machine rolls that card form is varied, and in fashioned iron blooming mill practical work process, operative employee is difficult to accurately determine blooming mill sometimes
Roll card degree, this method efficiently avoids fashioned iron blooming mill main transmission unhelpful in the case where seriously rolling card-like state from damage operation
Problem.
Specific embodiment
The present invention will be further described with reference to the examples below:
Embodiment 1
A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card of the present embodiment, the steps include:
Step 1: card state determination unit is rolled by fashioned iron blooming mill stall type and determines whether fashioned iron blooming mill is in stall
Type rolls card-like state, prevents from being under high current for a long time when fashioned iron blooming mill main drive motor stall；
Step 2: card state determination unit is rolled by the non-stall type of fashioned iron blooming mill and determines whether fashioned iron blooming mill is in non-
Stall type rolls card-like state, prevents the main transmission of fashioned iron blooming mill from rolling for a long time under follow current amplitude limit value with extremely low speed；
Step 3: fashioned iron blooming mill is determined in fashioned iron blooming mill surprise passage and occurs that stall type rolls card or non-stall type rolls card
When, the fashioned iron blooming mill main drive that fashioned iron blooming mill surprise passage rolls the enabled block control unit output of card main transmission enables item
Part is blocked, and is avoided fashioned iron blooming mill main transmission surprise passage long lasting in High-current output and is rolled card-like state；
Step 4: fashioned iron blooming mill is determined in fashioned iron blooming mill idol passage and occurs that stall type rolls card or non-stall type rolls card
When, the fashioned iron blooming mill main drive that fashioned iron blooming mill idol passage rolls the enabled block control unit output of card main transmission enables item
Part is blocked, and is avoided fashioned iron blooming mill main transmission idol passage long lasting in High-current output and is rolled card-like state.
A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card of the present embodiment, this prevents fashioned iron
Blooming mill main drive motor persistently rolls card control program and is mainly made of four control units, i.e. and functional block FXKZCC01~
FXKZCC08, FXKZCC12 and FXKZCC13 constitute fashioned iron blooming mill stall type and roll card state determination unit；Functional block
FXKZCC01, FXKZCC03~FXKZCC06 and FXKZCC09~FXKZCC13 constitute the non-stall type of fashioned iron blooming mill and roll card-like
State judging unit；Functional block FXKZCC14, FXKZCC15, FXKZCC17, FXKZCC19, FXKZCC21, FXKZCC22,
FXKZCC25 and FXKZCC26 constitutes fashioned iron blooming mill surprise passage and rolls the enabled block control unit of card main transmission；Functional block
FXKZCC14, FXKZCC16, FXKZCC18, FXKZCC19 and FXKZCC23~FXKZCC26 constitute fashioned iron blooming mill idol passage
Roll the enabled block control unit of card main transmission.
The production line fashioned iron blooming mill main transmission of Ma Gang great H profile steel is passed using Siemens SINAMICS SL150 AC-AC frequency conversion
Dynamic control device, can not continue to roll under main drive motor locked rotor condition, in order to avoid main biography in view of fashioned iron blooming mill
Persistently be in when dynamic synchronous motor stall current limit (i.e. 250%In (In is main drive motor rated current)) it
Under, in main drive motor stall and unchanged main drive motor Velocity Reference value, the fashioned iron main transmission control device
Main drive motor actual current will be made to be limited to 193%In or less automatically；In main drive motor stall, main transmission is electronic
When machine Velocity Reference value changes, which will make main drive motor actual current be limited to 236%In automatically
Below.It follows that conventional motor rotation-clogging protection (preventing motor from continuing the protection of stall under current limit)
It is difficult to play a role in the fashioned iron blooming mill main transmission control device, in this way, there is stall type in fashioned iron blooming mill when rolling card, it should
Fashioned iron blooming mill main transmission control device without detection and protects this, until the serious overheating protection movement of main drive motor is
Only.So in order to prevent fashioned iron blooming mill main drive motor stall when be under high current for a long time, prevent fashioned iron from opening at this
Base owner drive motor, which persistently rolls, to be devised fashioned iron blooming mill stall type and rolls card state determination unit in card control program.The type
It is that blooming mill practical rolling speed is absolute that steel blooming mill stall type, which rolls functional block FXKZCC01 output end Y in card state determination unit,
It is worth (meter per second), functional block FXKZCC04 output end Y is the absolute value of the difference that blooming mill sets mill speed and practical rolling speed
(meter per second), and functional block FXKZCC06 output end Y is that (motor is specified for blooming mill main drive motor actual current absolute value
The percentage of electric current).When blooming mill practical rolling speed absolute value less than 0.1 meter per second blooming mill setting mill speed and reality
The absolute value of the difference (meter per second) of border mill speed is greater than 0.75 meter per second and blooming mill main drive motor actual current is absolute
When value is greater than 150%In, which rolls functional block FXKZCC08 output end Q in card state determination unit and is
' 1 ' state.If it is more than 1.5 seconds that functional block FXKZCC08 output end Q, which is the duration of ' 1 ' state, determine that fashioned iron blooming mill is in
Stall type rolls card-like state, thus rolls card protection for fashioned iron blooming mill stall type and creates condition.
Card is rolled in order to avoid fashioned iron blooming mill stall type occur as far as possible, in the practical speed of fashioned iron blooming mill main drive motor
In the case that degree is not zero, when blooming mill main drive motor actual speed cannot follow setting speed, the fashioned iron blooming mill
Main transmission control device will increase main drive motor electric current (i.e. increasing main drive motor output torque) until reaching or holding
Current limit is held in continuation of insurance, tries that main drive motor actual speed is made to follow setting speed with this.It is different for big specification fashioned iron
The rolling load (or rolling torsion) of the split rolling method of shape base, the certain road sub-distribution of fashioned iron blooming mill may be bigger, in this way,
When these passes, if steel billet temperature is slightly relatively low, the practical rolling torsion of fashioned iron blooming mill may be close to or be more than fashioned iron
Blooming mill main drive motor max. output torque.When the practical rolling torsion of fashioned iron blooming mill is more than the main transmission of fashioned iron blooming mill
When motor max. output torque, fashioned iron blooming mill will will appear stall type and roll card；When the practical rolling torsion of fashioned iron blooming mill
When close or equal to fashioned iron blooming mill main drive motor max. output torque, the main transmission of fashioned iron blooming mill is not due to additional
Torque accelerates for the transmission in the operation of rolling, in this way, fashioned iron blooming mill main transmission actual speed cannot follow setting speed
Rising and rise, fashioned iron blooming mill practical rolling speed by depend on blooming mill biting speed and sting steel prompt drop.Work as type
When steel blooming mill biting speed is higher, blooming mill main transmission remains to limit with certain low speed in follow current after certain prompt drop
Continue to roll under amplitude；When fashioned iron blooming mill biting speed is lower, blooming mill main transmission may be with after certain prompt drop
Extremely low speed (such as below 0.5 meter per second) continues to roll under follow current amplitude limit value, in this case, 11 meters or so length
The fashioned iron shaped blank of degree rolling time under so low mill speed will reach 22 seconds or so.Fashioned iron blooming mill main transmission electricity
Motivation continues such a long time and operates under current limit, this not only brings grievous injury to main drive motor, simultaneously
Also serious damage is brought to fashioned iron blooming mill main transmission control device main circuit power device.So from protection fashioned iron blooming mill
From the point of view of in terms of main transmission relevant device, the main transmission of fashioned iron blooming mill can be rolled view with extremely low speed under follow current amplitude limit value
Card is rolled for the non-stall type of fashioned iron blooming mill.The main transmission of fashioned iron blooming mill is with extremely low speed under follow current amplitude limit value in order to prevent
It rolls for a long time, preventing fashioned iron blooming mill main drive motor from persistently rolling at this, that fashioned iron blooming mill is devised in card control program is non-
Stall type rolls card state determination unit.When the blooming mill setting rolling less than 0.5 meter per second of blooming mill practical rolling speed absolute value
The absolute value of the difference (meter per second) of speed and practical rolling speed is greater than 0.75 meter per second and blooming mill main drive motor is practical
When current absolute value is greater than 240%In, the non-stall type of the fashioned iron blooming mill rolls functional block FXKZCC11 in card state determination unit
Output end Q is ' 1 ' state.If it is more than 1.5 seconds that functional block FXKZCC11 output end Q, which is the duration of ' 1 ' state, determine that fashioned iron is opened
Base machine is in non-stall type and rolls card-like state, thus rolls card protection for the non-stall type of fashioned iron blooming mill and creates condition.
By (the milling train control of upper level controller when for fashioned iron blooming mill main transmission control device, usually surprise passes
PLC processed) the Velocity Reference value that provides is positive value, and provided when even passes by upper level controller (milling train control PLC)
Velocity Reference value be negative value.In this way, when this prevents fashioned iron blooming mill main drive motor from persistently rolling card control program in fashioned iron
Blooming mill surprise passage, which determines fashioned iron blooming mill and stall type occurs, rolls card or when non-stall type rolls card, in order to prevent fashioned iron blooming mill
Main drive motor persistently rolls card, is positive in the Velocity Reference value that the blooming mill main transmission speed manipulation bar of operative employee's control provides
When being worth or being zero, milling train control PLC should block the operation enable signal of blooming mill main transmission control device, in this way, can not only make
Blooming mill can not continue odd passage and roll mill operation under card-like state, while can also make blooming mill main drive motor electric current by just
It is decreased to zero to clipping state of value or close to the pressure of positive limiting state of value, and in the blooming mill main transmission speed of operative employee's control
When the Velocity Reference value that control stick provides is negative value (i.e. the operation of falling steel of the odd passage of fashioned iron blooming mill progress), milling train control PLC
The operation enable signal of cogging owner's transmission control device should be discharged, so that fashioned iron blooming mill carries out the operation of falling steel of odd passage.
For this purpose, preventing from fashioned iron blooming mill main drive motor from persistently rolling devising fashioned iron blooming mill surprise passage in card control program and roll at this
The enabled block control unit of card main transmission.The fashioned iron blooming mill surprise passage rolls functional block in the enabled block control unit of card main transmission
FXKZCC19 input terminal X1 is the draught pressure of blooming mill, when the draught pressure of blooming mill is greater than 1MN (having steel in blooming mill)
When, functional block FXKZCC19 output end QL is ' 0 ' state, when the speed that the blooming mill main transmission speed manipulation bar of operative employee's control provides
When spending a reference value greater than 0.1 meter per second (i.e. fashioned iron blooming mill carries out odd passes), which rolls the main biography of card
Functional block FXKZCC14 output end QU is ' 1 ' state in dynamic enabled block control unit.In this way, occurring in fashioned iron blooming mill surprise passage
Stall type rolls card or when non-stall type rolls card, and functional block FXKZCC17 output end Q is ' 1 ' state in the unit, and in the unit
" reset terminal R preferential rest-set flip-flop " functional block FXKZCC21 output end Q is ' 1 ' state.As a result, in the rolled piece for rolling card not from fashioned iron
Before being poured out in blooming mill, i.e., before functional block FXKZCC19 output end QL becomes ' 1 ' state in the unit, as long as operative employee controls
The Velocity Reference value that provides of blooming mill main transmission speed manipulation bar be greater than 0.1 meter per second (i.e. blooming mill surprise passage continues to roll)
Or between -0.1 meter per second~0.1 meter per second when (i.e. blooming mill main transmission speed manipulation bar is in and returns to zero state), the unit
Middle functional block FXKZCC15 and FXKZCC22 output end Q is ' 1 ' state, in this way, FXKZCC26 output end Q is ' 0 ' in the unit
State, the fashioned iron blooming mill main drive of unit output enable condition and are blocked, and avoid fashioned iron blooming mill main transmission as a result,
Odd passage rolls card-like state long lasting in High-current output.
Equally, when this prevents fashioned iron blooming mill main drive motor from persistently rolling card control program in fashioned iron blooming mill idol passage
It determines fashioned iron blooming mill and stall type occurs and roll card or when non-stall type rolls card, in order to prevent fashioned iron blooming mill main drive motor
Card is persistently rolled, when the Velocity Reference value that the blooming mill main transmission speed manipulation bar of operative employee's control provides is negative value or is zero,
Milling train control PLC should block the operation enable signal of blooming mill main transmission control device, in this way, can not only make blooming mill can not be after
Continuous idol passage rolls the mill operation under card-like state, while also blooming mill main drive motor electric current can be made by negative limiting state of value
Or it is decreased to zero close to the pressure of negative limiting state of value, and provided in the blooming mill main transmission speed manipulation bar of operative employee's control
When Velocity Reference value is positive value (i.e. the operation of falling steel of the even passage of fashioned iron blooming mill progress), milling train control PLC should discharge blooming mill
The operation enable signal of main transmission control device, so that fashioned iron blooming mill carries out the operation of falling steel of even passage.For this purpose, preventing at this
Fashioned iron blooming mill main drive motor, which persistently rolls, to be devised fashioned iron blooming mill idol passage to roll card main transmission enabled in card control program
Block control unit.When the Velocity Reference value that provides of blooming mill main transmission speed manipulation bar of operative employee's control be less than -0.1 meter/
When second (i.e. fashioned iron blooming mill carries out even passes), which rolls the enabled block control unit of card main transmission
Middle functional block FXKZCC14 output end QL is ' 1 ' state.In this way, stall type occur in fashioned iron blooming mill idol passage rolls card or non-stall
When type rolls card, functional block FXKZCC18 output end Q is ' 1 ' state in the unit, and " reset terminal R preferential RS touching in the unit
Hair device " functional block FXKZCC23 output end Q is ' 1 ' state.As a result, in the rolled piece for rolling card not before being poured out in fashioned iron blooming mill,
Before functional block FXKZCC19 output end QL becomes ' 1 ' state i.e. in the unit, as long as the blooming mill main transmission speed of operative employee's control
The Velocity Reference value that degree control stick provides is less than -0.1 meter per second (i.e. blooming mill idol passage continues to roll) or in -0.1 meter per second
Between~0.1 meter per second when (i.e. blooming mill main transmission speed manipulation bar is in and returns to zero state), functional block FXKZCC16 in the unit
It is ' 1 ' state with FXKZCC24 output end Q, in this way, FXKZCC26 output end Q is ' 0 ' state, the type of unit output in the unit
Steel blooming mill main drive enable condition be blocked, avoid as a result, fashioned iron blooming mill main transmission idol passage long lasting for
Card-like state is rolled in High-current output.
Schematically the present invention and embodiments thereof are described above, description is not limiting, actual side
Method is not limited thereto.So not departing from the invention objective if those of ordinary skill in the art are inspired by it
In the case of, frame mode similar with the technical solution and embodiment are not inventively designed, should belong to of the invention
Protection scope.
Claims (1)
1. a kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card, it is characterised in that: the steps include:
Step 1: card state determination unit is rolled by fashioned iron blooming mill stall type and determines whether fashioned iron blooming mill is in stall type and rolls
Card-like state prevents from being under high current for a long time when fashioned iron blooming mill main drive motor stall；
Step 2: card state determination unit is rolled by the non-stall type of fashioned iron blooming mill and determines whether fashioned iron blooming mill is in non-stall
Type rolls card-like state, prevents the main transmission of fashioned iron blooming mill from rolling for a long time under follow current amplitude limit value with extremely low speed；
Step 3: determining fashioned iron blooming mill and stall type occur and roll card or when non-stall type rolls card in fashioned iron blooming mill surprise passage,
The fashioned iron blooming mill main drive that fashioned iron blooming mill surprise passage rolls the enabled block control unit output of card main transmission enables condition
It is blocked, avoids fashioned iron blooming mill main transmission surprise passage long lasting in High-current output and roll card-like state；
Step 4: determining fashioned iron blooming mill and stall type occur and roll card or when non-stall type rolls card in fashioned iron blooming mill idol passage,
The fashioned iron blooming mill main drive that fashioned iron blooming mill idol passage rolls the enabled block control unit output of card main transmission enables condition
It is blocked, avoids fashioned iron blooming mill main transmission idol passage long lasting in High-current output and roll card-like state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710685707.4A CN107470370B (en) | 2017-08-11 | 2017-08-11 | A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710685707.4A CN107470370B (en) | 2017-08-11 | 2017-08-11 | A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card |
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| Publication Number | Publication Date |
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| CN107470370A CN107470370A (en) | 2017-12-15 |
| CN107470370B true CN107470370B (en) | 2019-10-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396703A (en) * | 2001-07-05 | 2003-02-12 | 三菱电机株式会社 | Steel plate rolling device |
| CN101253006A (en) * | 2006-08-03 | 2008-08-27 | 东芝三菱电机产业系统株式会社 | Drive apparatus of electric motor for roller |
| CN103460597A (en) * | 2011-05-26 | 2013-12-18 | 三菱电机株式会社 | Motor control device |
| CN104467562A (en) * | 2013-09-20 | 2015-03-25 | 美蓓亚株式会社 | Motor driving control device and control method of motor driving control device |
| CN104438361A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
-
2017
- 2017-08-11 CN CN201710685707.4A patent/CN107470370B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396703A (en) * | 2001-07-05 | 2003-02-12 | 三菱电机株式会社 | Steel plate rolling device |
| CN101253006A (en) * | 2006-08-03 | 2008-08-27 | 东芝三菱电机产业系统株式会社 | Drive apparatus of electric motor for roller |
| CN103460597A (en) * | 2011-05-26 | 2013-12-18 | 三菱电机株式会社 | Motor control device |
| CN104467562A (en) * | 2013-09-20 | 2015-03-25 | 美蓓亚株式会社 | Motor driving control device and control method of motor driving control device |
| CN104438361A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
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| CN107470370A (en) | 2017-12-15 |
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