CN108637018A - A method of prevent two region slabs from colliding in Plate Rolling Process - Google Patents
A method of prevent two region slabs from colliding in Plate Rolling Process Download PDFInfo
- Publication number
- CN108637018A CN108637018A CN201810552050.9A CN201810552050A CN108637018A CN 108637018 A CN108637018 A CN 108637018A CN 201810552050 A CN201810552050 A CN 201810552050A CN 108637018 A CN108637018 A CN 108637018A
- Authority
- CN
- China
- Prior art keywords
- slab
- rolling
- region
- steel
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
A method of it prevents two region slabs from colliding in Plate Rolling Process, belongs to technical field of steel rolling.Independent research cut deal automatic control system roll control strategy in the horizontal direction：It prevents the slab rolled from striding into the slab swung to gate area with gate area since slab is elongated during the rolling process and colliding, reduces field accident rate, ensure efficient rolling rhythm.
Description
Technical field
The invention belongs to Steel Rolling Control technical fields, and system is controlled more particularly to Hot Rolling Process For High Temperature Alloy Plate production line efficient rolling
System, specifically a kind of solution cut deal is in the quick operation of rolling, the controlling party that prevents adjacent area slab from colliding
Method.
Background technology
In Hot Rolling Process For High Temperature Alloy Plate production line, fast rolling rhythm, rational technology controlling and process occupy great meaning in actual production
Justice.During the rolling process, it crashes if there is adjacent area slab, being not only due to process accident influences production rolling
Rhythm, but also the quality of collision accident influence product may be caused by.
Heavy Plate Production line is generally divided into entrance area, rolling region, exit region, layer cold area domain, aligning area by region
Domain (as shown in Figure 1).Wherein layer cold area domain is independent control area with aligning region；Entrance area function, which is rolling region, to be had
When slab brand new slab in the interim swing of entrance area or slab due to waiting for warm swing in the region needed for technological requirement,
Otherwise by the region, slab is transported to rolling region；Region is rolled to be required to complete slab rolling forming control according to rolling mill practice；
Exit region is to require to swing in the region when layer is cold grade for subsequent sections are not ready to ready or rolling mill practice, otherwise will be after rolling
Slab be transported to subsequent sections (layer cold area domain and aligning region).
In production process, rolling region receives entrance area slab automatically, and the slab rolling is completed according to technological requirement；Such as
Fruit technological requirement is needed in certain intermediate rolling pass when temperature, and rolling region is after completing the passes, it is necessary to send slab
It carries out waiting for temperature to entrance area or exit region, the automatic rolling of lower block of slab can be carried out by rolling region at this time.Work as rolling zone
When the length of the slab that domain is rolling slab during the rolling process is not cross over the wobble area of entrance, it can smoothly complete
The rolling of slab.And when outlet or entrance area have slab swing, if the slab that rolling region is rolling is since length becomes
Change it is long and when across entrance or exit region, the slab that will certainly swung with gate area collides, and (Fig. 2 is to roll
Collide situation, Fig. 3 of making sheet base and entrance area slab is rolled slab and exit region slab collides situation).
Its reason is mainly：When there is slab in gate area in swing, area's slab is rolled since the rolling of multi-pass causes
Slab is elongated, when rolled slab head is across exit region or slab tail portion across entrance area, if gate area is swung
Generating state variation certainly will not collide slab with rolled slab.In case of such collision accident, just in rolled slab
Since thinner thickness is bound to cause the irregular deformation of steel slab surface to cause quality problems, simultaneously because process accident and shadow
Ring the production time.
Invention content
When having slab swing due to gate area the purpose of the present invention is to provide one kind, when the slab rolled by
When multi- pass rolling causes the slab rolled long and is cross over entrance wobble area, prevent just rolled slab with go out
Entrance area swings the method that slab collides.This method is suitable for the plank automatic control system with similar situation,
The phenomenon that can solve polylith slab adjacent area slab collides during the rolling process, to solve due to collision
Caused by quality problems and influence the production time the problem of.
The present invention has at 3 points：
First, the definition of each region as-rolled condition：During automatic rolling, by different zones according to needed for the operation of rolling
Several step sequences are divided into, can judge current as-rolled condition according to practical step sequence in this way；
Second is that the calculating and setting of safe distance：According to kinematics formula, the safety that two region slabs do not collide is set
Distance.
Third, judge gate area slab with roll region slab practical as-rolled condition, when gate area slab with
Roll area's slab specifically step sequence state under, and gate area slab distance roll area's slab less than safe distance when, entrance
Region slab jumps to synchronous regime immediately.Thrown the steel stage for Opposite side loading or reversely when the rolling in rolling region walks sequence, and
When rolled slab tail portion swings slab head less than safe distance apart from entrance, entrance area jumps to synchronous regime immediately
(i.e. entrance area speed is with rolling region)；Or it is that positive load or forward direction are thrown the steel stage, and are rolled to work as the step sequence in rolling region
When the outlet of slab head distance swings slab tail position less than safe distance, exit region jumps to synchronous regime (i.e. immediately
Exit region speed is with rolling region)；Rolled slab is less than rolled slab with entrance swing slab during the rolling process in this way
When safe distance, gate area slab is consistent with rolled slab speed, avoids rolling region slab and the mouth region that comes in and goes out
Domain swings slab and collides.
A method of prevent two region slabs from colliding in Plate Rolling Process, specific control method
For：
Step 1: will rolling region step sequence be divided into forward direction send steel, positive load, it is positive throw steel, reversely send steel, it is reversed plus
It carries, the reversed throwing steel stage；The steel state of sending is that slab is conveyed slab until milling train has load stage from stop position；Institute
The stress state stated is to sting the steel moment to the milling train zero load stage from milling train；The throwing steel state is from the milling train zero load moment
The steel position stage is thrown to slab to be sent to.
Step 2: if entrance area is in swing state, it is in Opposite side loading or reversed throwing steel stage when rolling area, and roll
When making sheet base tail portion swings slab head less than safe distance apart from entrance area, entrance area jumps to synchronous regime immediately；
When rolled slab completes reversed rolling, entrance area is restored to original swing state；If exit region is in swing state,
It is in positive load or positive throwing steel stage when rolling area, and rolled slab head distance exit region swings slab tail portion and is less than peace
When full distance, exit region jumps to synchronous regime immediately；When rolled slab completes positive rolling, exit region restores immediately
To original swing state.
The safe distance isWherein S is safe distance, and a is actual acceleration,
V2For end speed, V1For initial velocity, S ' is safety value.
Specifically control is for it：
1) definition of automatic rolling step sequence：
(1) definition of rolling region step sequence state：Forward direction send steel state step the defining of sequence, positive stress state step sequence to determine
Justice, the positive definition for throwing steel state step sequence；The reversed definition for sending steel state to define step sequence, the definition of Opposite side loading state step sequence,
The reversed definition for throwing steel state step sequence；
(2) definition of entrance area step sequence state；Forward direction swing state step the defining of sequence, backward swing state step sequence are determined
The definition of justice, synchronous regime step sequence；
(3) definition of exit region step sequence state；Forward direction swing state step the defining of sequence, backward swing state step sequence are determined
The definition of justice, synchronous regime step sequence；
2) calculating and setting of safe distance：
According to kinematics formula 2aS=V2 2-V1 2,V2=V1+ at, S=V*t wherein S are distance, and a is actual acceleration, V2
For end speed, V1For initial velocity, t is from initial velocity V1Raising speed is to V2The time of Shi Suoxu；
(1) when the swing speed of gate area is V1With roll area speed V2When being equidirectional, two slabs do not collide when institute just
Need distance be
(2) when the swing speed of gate area is V1With roll area speed V2For negative direction when, two slabs do not collide when institute just
Need distance be
(3) in summary two kinds of situations, when the second situation it is required distance it is maximum, we take second of required distanceIt for the distance that do not collide, while due to safety concerns, needs to be worth herein plus a safety value S ', i.e.,
Required safe distance
3) judgement of step sequence state：
(1) when entrance area is swing state, rolling region is Opposite side loading or reversed throwing steel stage, and works as rolling zone
When domain slab tail portion swings slab head position less than safe distance S apart from entrance, entrance area jumps to synchronous regime immediately；
(2) when exit region is swing state, it is positive load or positive throwing steel stage to roll region, and works as rolling zone
When domain slab head distance outlet swings slab tail position less than safe distance S, exit region jumps to synchronous regime immediately；
4) recovery of gate area state：
(1) when entrance area is synchronous regime, when reversed throwing steel is completed in rolling region, entrance area restores previous immediately
Swing state；
(2) when exit region is synchronous regime, when positive throwing steel is completed in rolling region, exit region restores original immediately
Swing state；
The present invention is characterized in：The operation of rolling is divided into several states according to rolling mill practice, foundation is actually rolled
Whether condition adjudgement gate area processed jumps to synchronous regime, to avoid the slab in two regions from touching during the rolling process
It hits, specific control flow chart such as Fig. 4.
The beneficial effects of the present invention are：Rolling line automatic rolling process is divided into several states, factually border as-rolled condition
Judge whether gate area jumps to synchronous regime, in this way when two region slab actual ranges are more than safe distance, twoth area
Domain speed keeps synchronizing, to avoid the slab in two regions from colliding during the rolling process.
Description of the drawings
Fig. 1 is the division schematic diagram in Medium and Heavy Plate Rolling region
Fig. 2 is that Plate Rolling Process is when reversely rolling, and rolled slab swings slab with entrance and collides
Fig. 3 is Plate Rolling Process when being positive rolling, and rolled slab collides with outlet swing slab
Control flow chart when Fig. 4 is the automatic rolling of the present invention
Specific implementation mode
With certain company, the areas Heavy Plate Production Xian Zha automatic rolling process is analyzed below, illustrates that there is being plate in gate area
Under base swing state, as-rolled condition and the practical position end to end of rolled slab in region are rolled by judgement, increases the mouth region that comes in and goes out
Control effect of the domain with sequence step by step.
In production process, when gate area has slab to be in swing state, area is rolled during automatic rolling, if
When rolled slab leads to slab since slab is elongated during multi- pass rolling gate area is not touched in position end to end, rolling
Region can favorably accomplish this slab rolling.And if rolled slab during multi- pass rolling since slab length is touched
When to entrance wobble area, slab will certainly be swung with entrance and collided.Such case occur can only stop rolling, and locate
It is rolled again after reason field accident.
During automatic rolling, gate area, and rolling region are divided by multiple rolling shapes according to rolling mill practice
State.When entrance has slab swing, judges as-rolled condition and the slab position end to end of rolled slab, change gate area
Swing state, solve the problems, such as due to rolled slab length it is long caused by collide with entrance slab, to ensure
Being smoothed out of automatic rolling.
It specifically controls and is：
1. region walks the definition of sequence state：
(1) definition of entrance area state：It is 4150 to walk sequence state to swing before entrance area, indicates entrance area speed
For the swing forward of 0.5 meter per second；After entrance area to swing step sequence state be 4200, indicate entrance area speed be -0.5 meter/
The swing backward of second；Entrance area is synchronized with that roll area speed step sequence state be 4300, indicates that entrance area speed is rolled with rolling area
Speed sync operation processed；
(2) definition of exit region state：It is 8150 to walk sequence state to swing before exit region, there is shown mouth zone velocity
For the swing forward of 0.5 meter per second；After exit region to swing step sequence state be 8200, there is shown mouth zone velocity be -0.5 meter/
The swing backward of second；Exit region is synchronized with that roll area speed step sequence state be 8300, there is shown mouth zone velocity is rolled with rolling area
Speed sync operation processed；
(3) definition of zone state is rolled：It is 6400 that rolling region forward direction, which send steel step sequence state, indicates that rolling region is positive
Send steel；It is 6450 to roll region forward direction load step sequence state, indicates that milling train forward direction stings the steel moment to the zero load rank of mill rolling force
Section；It is 6500 to roll region forward direction and throw steel step sequence state, and slab forward direction is sent to from the milling train zero load moment to by slab by expression
Throw the steel position stage；It is 7400 that steel step sequence state is reversely sent in rolling region, indicates that steel is reversely sent in rolling region；It is anti-to roll region area
It is 7450 to load step sequence state, indicates that milling train reversely stings the steel moment to the mill rolling force zero load stage；It is reversed to roll region
It is 7500 to throw steel step sequence state, indicates slab being reversely sent to the throwing steel position stage from the milling train zero load moment to by slab；
The determination of safe distance when 2. gate area synchronizes：
The safe distance of synchronization point is calculated by taking entrance area as an example：The maximum mill speed of this control system is 4m/s,
Entrance area slab swing speed is ± 0.5m/s, roll table accelerating 1m/s2。
(1) 4.5 are needed when entrance area is synchronized to rolling region inverted speed -4m/s by positive swing speed 0.5m/s
Second, when the areas Ze Zha slab reaches the -4m/s for rolling area from synchronization point to entrance area, roll region slab move distance 4.5*4
=18 meters, and entrance slab is reached from synchronization point when rolling area speed -4m/s, entrance area slab is far from the shifting for rolling area's slab
Dynamic distance isThen two region slabs are at least apart from when being 18-7.88=10.12 meters
Two slabs just do not bump against.
(2) it is synchronized to by -0.5m/s when entrance area speed when rolling area maximum reverse speed -4m/s and needs 3.5 seconds, then rolled
When area's slab reaches the -4m/s for rolling area from synchronization point to entrance area, 3.5*4=14 meters of region slab move distance is rolled；
And entrance slab is reached from synchronization point when rolling area speed -4m/s, entrance area slab is far from the displacement distance for rolling area's slab
ForThen two region slabs at least distance be 14-7.88=6.12 meters when two slabs just
It is good not bump against.
(3) in summary two kinds of situations, minimum range when entrance area is 0.5m/s when we choose synchronous are 10.12
Rice, while in order to ensure that two slabs have a suitable safe distance, this engineering we select 17 meters of safety as two region slabs
Distance.
3. rolling the switching of gate area state during area's automatic rolling；
(1) entrance area has in slab swing process, and rolling region as-rolled condition is reversed rolling and rolled slab tail portion
When swinging slab head position less than 17 meters apart from entrance, entrance area jumps into synchronous regime immediately, and (speed is with rolling speed
Degree)；Original swing state that entrance area restores after the completion of reversed rolling；
(2) exit region has in slab swing process, and rolling region as-rolled condition is positive rolling and rolled slab head
When distance outlet swings slab tail position less than 17 meters, exit region jumps into synchronous regime immediately, and (speed is with rolling speed
Degree)；Original swing state that exit region restores after the completion of positive roll；
It is put into practice by field application, when touching wobble area, is certain to if not considering that slab is elongated in the operation of rolling
Slab is swung with entrance to collide, and is not in be touched since slab rolling is long after using new control method
Slab collision situation occurs for wobble area.
Conclusion：The present invention defines entrance area, rolling region, exit region needed for rolling not according to rolling mill practice
Synchronous sequence；When gate area has slab to be in swing state, according to the step sequence in rolling region and rolling region slab head
Tail position swings the distance of slab position end to end far from gate area, and whether automatic decision gate area is with rolling region speed
Degree is jumped to sequence step by step.This ensure that rolling region slab is elongated touch gate area when, avoid and oscillating deck
Base collides；To ensure that the operation of rolling smoothly, efficiently.
Claims (2)
1. a kind of method for preventing two region slabs from colliding in Plate Rolling Process, it is characterised in that：
Steel is sent, positive load, positive steel thrown, reversely send steel, is Opposite side loading, anti-Step 1: rolling region step sequence is divided into forward direction
To the throwing steel stage；
The steel state of sending is that slab is conveyed slab until milling train has load stage from stop position；The stress state
To sting the steel moment to the milling train zero load stage from milling train；The throwing steel state is to be sent to from the milling train zero load moment to by slab
Throw the steel position stage；
Step 2: if entrance area is in swing state, Opposite side loading or reversed throwing steel stage, and milled sheet are in when rolling area
When base tail portion swings slab head less than safe distance apart from entrance area, entrance area jumps to synchronous regime immediately；When rolling
When making sheet base completes reversed rolling, entrance area is restored to original swing state；If exit region is in swing state, when rolling
Area be in positive load or it is positive throw the steel stage, and rolled slab head distance exit region swing slab tail portion be less than safety away from
From when, exit region jumps to synchronous regime immediately；When rolled slab completes positive rolling, exit region is restored to original immediately
First swing state.
2. the method for preventing two region slabs from colliding in Plate Rolling Process as described in claim 1, feature exist
In：The safe distance isWherein S is safe distance, and a is actual acceleration, V2For
End speed, V1For initial velocity, S ' is safety value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810552050.9A CN108637018B (en) | 2018-05-31 | 2018-05-31 | A method of prevent two region slabs from colliding in Plate Rolling Process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810552050.9A CN108637018B (en) | 2018-05-31 | 2018-05-31 | A method of prevent two region slabs from colliding in Plate Rolling Process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108637018A true CN108637018A (en) | 2018-10-12 |
| CN108637018B CN108637018B (en) | 2019-10-08 |
Family
ID=63759017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810552050.9A Active CN108637018B (en) | 2018-05-31 | 2018-05-31 | A method of prevent two region slabs from colliding in Plate Rolling Process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108637018B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438193A (en) * | 2020-03-31 | 2020-07-24 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for preventing rear-end collision during rolling of rough rolling slab |
| CN113649412A (en) * | 2021-07-19 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Hot rolling wire binding control method and device |
| CN114700377A (en) * | 2022-03-28 | 2022-07-05 | 北京京诚瑞达电气工程技术有限公司 | Method and system for controlling end-off rolling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722194A (en) * | 2009-11-05 | 2010-06-09 | 南京钢铁股份有限公司 | Gapless rolling process for single-strand steckel mill |
| CN102601123A (en) * | 2012-03-21 | 2012-07-25 | 莱芜钢铁集团有限公司 | Method for controlling swinging of medium and thick plate rolling steel plate roller way |
| KR20130088525A (en) * | 2012-01-31 | 2013-08-08 | 현대제철 주식회사 | Cooling apparatus for slab and controlling method thereof |
| CN104942026A (en) * | 2015-06-16 | 2015-09-30 | 河北钢铁股份有限公司邯郸分公司 | Moderate-thickness plate temperature-control rolling process making efficient use of lateral temperature waiting roll tables |
| CN105834224A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision |
| CN106607474A (en) * | 2015-10-26 | 2017-05-03 | 宝山钢铁股份有限公司 | Swing control method for steel plate in front of straightening machine |
-
2018
- 2018-05-31 CN CN201810552050.9A patent/CN108637018B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722194A (en) * | 2009-11-05 | 2010-06-09 | 南京钢铁股份有限公司 | Gapless rolling process for single-strand steckel mill |
| KR20130088525A (en) * | 2012-01-31 | 2013-08-08 | 현대제철 주식회사 | Cooling apparatus for slab and controlling method thereof |
| CN102601123A (en) * | 2012-03-21 | 2012-07-25 | 莱芜钢铁集团有限公司 | Method for controlling swinging of medium and thick plate rolling steel plate roller way |
| CN105834224A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision |
| CN104942026A (en) * | 2015-06-16 | 2015-09-30 | 河北钢铁股份有限公司邯郸分公司 | Moderate-thickness plate temperature-control rolling process making efficient use of lateral temperature waiting roll tables |
| CN106607474A (en) * | 2015-10-26 | 2017-05-03 | 宝山钢铁股份有限公司 | Swing control method for steel plate in front of straightening machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438193A (en) * | 2020-03-31 | 2020-07-24 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for preventing rear-end collision during rolling of rough rolling slab |
| CN111438193B (en) * | 2020-03-31 | 2021-09-21 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for preventing rear-end collision during rolling of rough rolling slab |
| CN113649412A (en) * | 2021-07-19 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Hot rolling wire binding control method and device |
| CN114700377A (en) * | 2022-03-28 | 2022-07-05 | 北京京诚瑞达电气工程技术有限公司 | Method and system for controlling end-off rolling |
| CN114700377B (en) * | 2022-03-28 | 2023-10-17 | 北京京诚瑞达电气工程技术有限公司 | Method and system for controlling head-removing rolling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108637018B (en) | 2019-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108637018B (en) | A method of prevent two region slabs from colliding in Plate Rolling Process | |
| CN100566866C (en) | A kind of control method of roughing intermediate blank camber | |
| CN103372572B (en) | Control method for improving rolling pace of roughing mill | |
| CN101722194B (en) | Gapless rolling process for single-strand steckel mill | |
| CA2623984A1 (en) | Method and device for producing a metal strip by continuous casting and rolling | |
| CN105834224A (en) | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision | |
| CN109590335B (en) | Control system and method for preventing steel billet from heading and tailing | |
| CN109590337B (en) | Control system and method for preventing steel scrap | |
| US5560095A (en) | Method of producing of hot rolled strips or profiles from a continuously cast primary material | |
| CN1058424C (en) | Method for calender rolling and cutting of hot rolled steel belt without connecting seam | |
| CN105821198A (en) | Control method for preventing buckling of thin strip steel during shutdown of continuous annealing furnace | |
| CN106269873B (en) | Utilize the method for holding pit and single heating furnace tandem rolling production hot-rolled orientation silicon steel | |
| JPS5858906A (en) | Controlling method for rolling efficiency in hot rolling | |
| KR101203045B1 (en) | Control of hot rolled product cross section under localized temperature disturbances | |
| KR100877053B1 (en) | Method for controlling of mortor of run-in roller table | |
| CN102896149B (en) | Hot-rolled strip steel rolling technology for preventing high-speed breaking-away of roughing mill | |
| CN103817157B (en) | A kind of roughing mills fluctuating acceleration roll control system and method | |
| CN107716550B (en) | A kind of production method of low-alloy longitudinal thickness-variable steel plate | |
| JP2006051526A (en) | Method for controlling idle time between steel sheets in finishing mill | |
| JP7141995B2 (en) | Hot-rolled steel sheet manufacturing method and hot-rolled steel sheet manufacturing system | |
| CN114507776B (en) | Control method, device, medium and computer equipment for multi-furnace tapping | |
| KR101115818B1 (en) | Apparatus and method for preventing error happenings from material extraction of heating furnace | |
| CN115138678A (en) | Rapid rolling method and system for aluminothermic continuous rolling roughing mill | |
| JP2007144454A (en) | Method for controlling conveyance time of rolled stock in hot-rolling line | |
| KR100992226B1 (en) | A method for controlling stop position of moving slab in slab leveling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |