CN102154543A - Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace - Google Patents
Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace Download PDFInfo
- Publication number
- CN102154543A CN102154543A CN2010101097025A CN201010109702A CN102154543A CN 102154543 A CN102154543 A CN 102154543A CN 2010101097025 A CN2010101097025 A CN 2010101097025A CN 201010109702 A CN201010109702 A CN 201010109702A CN 102154543 A CN102154543 A CN 102154543A
- Authority
- CN
- China
- Prior art keywords
- tension
- tension force
- furnace
- centerdot
- section
- 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
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000000137 annealing Methods 0.000 title claims abstract description 34
- 238000005097 cold rolling Methods 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000003746 surface roughness Effects 0.000 claims abstract description 6
- 238000007781 pre-processing Methods 0.000 claims abstract description 3
- 238000000611 regression analysis Methods 0.000 claims abstract description 3
- 238000011160 research Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Abstract
The invention relates to a method for pre-warning tension abnormity of a cold-rolling continuous annealing furnace, in particular to a method for pre-warning tension fall of an HF (High Frequency) section of a cold-rolling continuous annealing furnace. The method comprises the following steps of: 1, acquiring tension data of the HF section of the continuous annealing furnace, acquiring the thickness, width, material, temperature and inlet speed data of band steel at the same time and performing filtering preprocessing; 2, performing regression analysis on tension, the physical dimension of the band steel and a material signal by using the data acquired in the step 1, and analyzing and comparing with a tension set value of the original system; 3, analyzing the tension of a furnace roller between tension measuring instruments, and analyzing the relation between the tension data and the angular velocity in combination with a wrap angle between the band steel and the furnace roller; and 4, pre-warning and controlling the tension fall in the furnace according to the relation between the tension measuring data and the angular velocity as well as the relation among the material of the band steel, the roller surface roughness, the speed and the temperature difference, and giving a pre-warning result. The invention provides a method for effectively pre-warning the tension fall of the HF section for guiding production.
Description
Technical field
The present invention relates to the anti-method of cold rolled continuous annealing stove fault pre-alarming, relate in particular to a kind of cold rolled continuous annealing stove tension force abnormity early warning method.
Background technology
The tension force of stable control band steel HF section in the cold rolled continuous annealing stove, keep in balance with steady, it is the basis that guarantees the unit high-speed cruising, so the monitoring of the tension force of HF section is very important, if it is unusual that tension force takes place, can cause the stove internal tension unbalanced: tension force rises, and causes broken belt easily, and existing milling train has had the supervisory system of broken belt early warning; Tension force descends, and causes broken belt in wooden dipper song, sideslip and the stove easily, and milling train there is no relevant early warning measure.
General tension force is reported to the police and is mainly provided by surveying Zhang Yi, and focused protection equipment and broken belt are then rule of thumb manually adjusted by the operative employee the flatness defect that tension fluctuation causes.
The factor of tension force drop is a lot, and temperature, speed, band steel specification, roll surface roughness or the like all can influence tensile control.
Summary of the invention
The present invention is intended to address the aforementioned drawbacks, and provides a kind of continuous annealing furnace HF section tension force unusual method for early warning.The tension state that the present invention is directed to cold rolled continuous annealing stove HF section carries out early warning, proposes a kind of method of effective early warning HF section tension force drop, instructs production by effective early warning.
The method for early warning of a kind of continuous annealing furnace HF section tension force drop, it comprises,
Step 1, by the measurement of tensiometer, the tension data of stove HF section moves back in the company of collection, gathers belt steel thickness, width, material, temperature and inlet velocity data simultaneously, and carries out filter preprocessing;
Step 2 according to each data that step 1 is gathered, is carried out regression analysis to tension force and band steel geometrical dimension, material signal, analyzes with the tension force set(ting)value of original system then and compares:
Step 3, the principle of utilizing tension force and second flow amount to equate is analyzed the tension force of furnace roller between the tensiometer, and the cornerite between combined belt steel and the furnace roller, analyzes the relation between tension data and the circular frequency;
Step 4 according to survey opening the decline early warning control to the stove internal tension of the relation that exists between relation between data and the circular frequency and combined belt steel matter, roll surface roughness, speed, the temperature head, and provides the early warning result.
The method for early warning of described a kind of continuous annealing furnace HF section tension force drop, definite method of the band steel inlet velocity of described step 1 is: when non-slip, strip speed equates with roll speed; Original state when skidding is the roll surface speed in when beginning of skidding, and roll surface provides the difference of frictional force to power for Tension Difference with when skidding.
The method for early warning of described a kind of continuous annealing furnace HF section tension force drop, the relation in the described step 2 between strip tension and thickness, the width can be described as: the wide more thick more tension force of band steel is big more, and its mathematic(al) representation is:
F＝α+β×(Th×Wd)+γ×(Th×Wd)
2 (1)
Wherein: F is tension force [N], and Th is thickness [μ m], and Wd is width [mm], and α, beta, gamma are regression coefficient;
Based on formula (1), adopt measured data to return, the length tension relation of acquisition is as tensile early warning comparative figure.
The method for early warning of described a kind of continuous annealing furnace HF section tension force drop, in the described step 3, relation between described tension data and the circular frequency comprises: mainly drags principle and considers from motor, and the cornerite between combined belt steel and furnace roller, the pass of surveying between a data and the circular frequency is:
F wherein
0(t) be the inlet tension force of process furnace HF, F
1(t)～F
13(t) be tension force between the interior roller of process furnace, be TM5; T
Ei(t) be electromagnetic torque, ω
i(t) be furnace roller circular frequency, J
iThe rotational inertia of furnace roller, Ri are the furnace roller radius, i=1,2 ..., 13.
The method for early warning of described a kind of continuous annealing furnace HF section tension force drop, described step 4 is according to the actual temperature that records, speed and furnace roller coarseness data, tension force is calculated, if the tension force numerical value of calculating, less than the actual tension force numerical value that records, then make tension force drop early warning, prompting operation worker adjusts.
The method for early warning of described kind of continuous annealing furnace HF section tension force drop, the relation of described tension force and temperature is a research object to be with the steel section between adjacent two furnace rollers in the annealing furnace, this relation satisfies following model:
Wherein, Δ F is the Tension Difference between two furnace rollers, and C is band steel coefficient of thermal expansion; E is a band steel bomb modulus under the Current Temperatures; A is band steel sectional area, and l is the furnace roller spacing, and L is the length of annealing furnace.
The method for early warning of described kind of continuous annealing furnace HF section tension force drop, the relation of described tension force and speed is a research object with a pair of adjacent furnace roller, it satisfies following model:
Because the relational model between strip speed and belt steel temperature is:
Therefore, (4) are changed to
Wherein, l is the furnace roller spacing, f
1(q), f
2(q) for being the functional expression of translation operator q, Δ υ: the velocity contrast of the band steel of rod both sides, v
2-v
1=Δ v.
The present invention proposes the unusual method for early warning of a kind of continuous annealing furnace HF section tension force,, provide the early warning result by strip tension decline early warning control.Ensure that strip quality is stablized and the safety of equipment.
Description of drawings
Below, in conjunction with the accompanying drawings, the present invention is further illustrated
Fig. 1 is the figure of HF section roller system;
Fig. 2 is tension force drop early warning logical diagram of the present invention.
Embodiment
As depicted in figs. 1 and 2, the early warning of tension force drop is considered in the present invention two aspects of temperature effect in the mechanism of HF section tension control and the stove.It is HF inlet tension measurements that 4# surveys an instrument signal (TM4), and it is HF outlet tension measurements that 5# surveys an instrument signal (TM5).
When there was second difference in flow in the band steel between 2 o'clock, band steel generation elastic deformation, elastic deformation influences tension control.
The HF section has 14 rollers, drags principle according to motor, and each roller has:
F wherein
0(t) be the inlet tension force of process furnace HF, i.e. TM4 (Fig. 2), F
1(t)～F
13(t) be tension force between the interior roller of process furnace, be TM5.T
Ei(t) be electromagnetic torque, ω
i(t) be furnace roller circular frequency, J
iThe rotational inertia of furnace roller, Ri are the furnace roller radius, i=1,2 ..., 13.
The mechanism that produces from tension force, causes that the factor of strip tension fluctuation is a lot of at interference fringe steel tension stability on the continuous annealing line, and wherein strip speed, belt steel temperature change, roll surface friction and roller directly change etc. is main factor.
The relation of 1 tension force and temperature
In band steel continuous annealing process, the lifting of temperature is expanded with heat and contract with cold the band steel and then is influenced the tension force of band steel.Extend because of thermal expansion when belt steel temperature raises, is with steel, strip tension can reduce under the situation of not carrying out any control; Otherwise strip tension can increase.To be with the steel section between adjacent two furnace rollers in the annealing furnace is research object, and the relational model of band steel tension variation amount that causes because of expanding with heat and contract with cold in service and belt steel temperature is as follows:
Wherein, Δ F is the Tension Difference between two furnace rollers, and C is band steel coefficient of thermal expansion; E is a band steel bomb modulus under the Current Temperatures; A is band steel sectional area, and l is the furnace roller spacing, and L is the length of annealing furnace.
The relation of 2 tension force and speed
In band steel operational process, when the rotating speed that is adjacent the downstream furnace roller when the rotating speed of certain furnace roller does not wait, the tension of band steel between two furnace rollers must occur or relax, promptly tension force changes.Get a pair of adjacent furnace roller model (as Fig. 2) for research object, can set up certain to the relationship between adjacent furnace roller speed discrepancy and the corresponding section strip steel tension force:
Wherein, l is the furnace roller spacing.
According to continuous annealing process, belt steel temperature is relevant with its travelling speed, and realizes the quick adjustment belt steel temperature by regulating strip speed.Therefore, strip speed changes also and can and then change strip tension by the change temperature.Relational model between strip speed and belt steel temperature is:
Wherein, f
1(q), f
2(q) for being the functional expression of translation operator q.
Can further draw the influence model of strip speed to strip tension:
The relation of 3 tension force and band steel geometrical dimension
Strip tension generally can be described as with the relation of thickness and width: the width and the thickness of band steel are directly proportional in its tension force.Its mathematic(al) representation is:
F＝α+β×(Th×Wd) (6)
Or:
F＝α+β×(Th×Wd)+γ×(Th×Wd)
2 (7)
Wherein: F is tension force [N], and Th is thickness [μ m], and Wd is width [mm], and α, beta, gamma are regression coefficient.
The influence of factors such as roll surface friction and roller directly change, the present invention does not consider.
The relation of 4 tension force and each influence factor
There is certain relation between tension force and band steel matter, roll surface roughness, velocity contrast, the temperature head.
Generally speaking, the stocking of high-temperature rigid is had relatively high expectations to tensile, and the velocity contrast between TM4, the TM5 is big more, and tensile control is difficult more; Temperature head in the HF stove is big more, and control requires high more to tensile; The roll surface roughness descends, and then causes easily to skid and cause the tension force drop.
Claims (7)
1. the method for early warning of continuous annealing furnace HF section tension force drop is characterized in that, it comprises,
Step 1, by the measurement of tensiometer, the tension data of stove HF section moves back in the company of collection, gathers belt steel thickness, width, material, temperature and inlet velocity data simultaneously, and carries out filter preprocessing;
Step 2 according to each data that step 1 is gathered, is carried out regression analysis to tension force and band steel geometrical dimension, material signal, analyzes with the tension force set(ting)value of original system then and compares:
Step 3, the principle of utilizing tension force and second flow amount to equate is analyzed the tension force of furnace roller between the tensiometer, and the cornerite between combined belt steel and the furnace roller, analyzes the relation between tension data and the circular frequency;
Step 4 according to survey opening the decline early warning control to the stove internal tension of the relation that exists between relation between data and the circular frequency and combined belt steel matter, roll surface roughness, speed, the temperature head, and provides the early warning result.
2. the method for early warning of a kind of continuous annealing furnace HF section tension force drop according to claim 1 is characterized in that definite method of the band steel inlet velocity of described step 1 is: when non-slip, strip speed equates with roll speed; Original state when skidding is the roll surface speed in when beginning of skidding, and roll surface provides the difference of frictional force to power for Tension Difference with when skidding.
3. the method for early warning of a kind of continuous annealing furnace HF section tension force drop according to claim 1, it is characterized in that, relation in the described step 2 between strip tension and thickness, the width can be described as: the wide more thick more tension force of band steel is big more, and its mathematic(al) representation is:
F＝α+β×(Th×Wd)+γ×(Th×Wd)
2 (1)
Wherein: F is tension force [N], and Th is thickness [μ m], and Wd is width [mm], and α, beta, gamma are regression coefficient;
Based on formula (1), adopt measured data to return, the length tension relation of acquisition is as tensile early warning comparative figure.
4. the method for early warning of a kind of continuous annealing furnace HF section tension force drop according to claim 1, it is characterized in that, in the described step 3, relation between described tension data and the circular frequency comprises: mainly drag principle from motor and consider, cornerite between combined belt steel and furnace roller, the pass of surveying between a data and the circular frequency is:
F wherein
0(t) be the inlet tension force of process furnace HF, F
1(t)～F
13(t) be tension force between the interior roller of process furnace, be TM5; T
Ei(t) be electromagnetic torque, ω
i(t) be furnace roller circular frequency, J
iThe rotational inertia of furnace roller, Ri are the furnace roller radius, i=1,2 ..., 13.
5. the method for early warning of a kind of continuous annealing furnace HF section tension force drop according to claim 1, it is characterized in that, described step 4 is according to the actual temperature that records, speed and furnace roller coarseness data, tension force is calculated, if the tension force numerical value of calculating, less than the actual tension force numerical value that records, then make tension force drop early warning, prompting operation worker adjusts.
6. plant the method for early warning of continuous annealing furnace HF section tension force drop according to claim 1 or 5, it is characterized in that, the relation of described tension force and temperature is a research object to be with the steel section between adjacent two furnace rollers in the annealing furnace, and this relation satisfies following model:
Wherein, Δ F is the Tension Difference between two furnace rollers, and C is band steel coefficient of thermal expansion; E is a band steel bomb modulus under the Current Temperatures; A is band steel sectional area, and l is the furnace roller spacing, and L is the length of annealing furnace.
7. plant the method for early warning of continuous annealing furnace HF section tension force drop according to claim 1 or 5, it is characterized in that the relation of described tension force and speed is a research object with a pair of adjacent furnace roller, it satisfies following model:
Because the relational model between strip speed and belt steel temperature is:
Therefore, (4) are changed to
Wherein, l is the furnace roller spacing, f
1(q), f
2(q) for being the functional expression of translation operator q, Δ υ: the velocity contrast of the band steel of rod both sides, v
2-v
1=Δ v.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109702.5A CN102154543B (en) | 2010-02-11 | 2010-02-11 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109702.5A CN102154543B (en) | 2010-02-11 | 2010-02-11 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102154543A true CN102154543A (en) | 2011-08-17 |
| CN102154543B CN102154543B (en) | 2014-06-11 |
Family
ID=44436212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010109702.5A Expired - Fee Related CN102154543B (en) | 2010-02-11 | 2010-02-11 | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102154543B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406367A (en) * | 2013-08-16 | 2013-11-27 | 中冶南方（武汉）自动化有限公司 | Method for improving direct tension control precision of cold calender |
| CN104988301A (en) * | 2015-07-09 | 2015-10-21 | 武汉钢铁(集团)公司 | Annealing furnace interior control method |
| CN106350657A (en) * | 2016-08-29 | 2017-01-25 | 首钢京唐钢铁联合有限责任公司 | Anti-deflection alarm system used in continuous vertical annealing oven |
| CN106381379A (en) * | 2016-08-29 | 2017-02-08 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling tension in annealing furnace |
| CN107142370A (en) * | 2017-06-25 | 2017-09-08 | 苏州金钜松机电有限公司 | A kind of Medium drawing mach ine annealing regulation system |
| CN108229072A (en) * | 2018-02-10 | 2018-06-29 | 东北大学 | Continuous annealing soaking pit strip tension On-line Measuring Method based on data parsing |
| CN108359775A (en) * | 2018-02-27 | 2018-08-03 | 首钢京唐钢铁联合有限责任公司 | The setting method of vertical continuous annealing furnace tension |
| CN109894475A (en) * | 2019-02-28 | 2019-06-18 | 北京首钢股份有限公司 | A kind of cold-rolling continuous annealing equipment degradation trend method for early warning and device |
| CN110129545A (en) * | 2019-04-28 | 2019-08-16 | 首钢智新迁安电磁材料有限公司 | A kind of method and apparatus improving annealing furnace tension force stability |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01298120A (en) * | 1988-05-27 | 1989-12-01 | Kawasaki Steel Corp | Method for controlling tension of strip in looper |
| CN1107764A (en) * | 1994-03-02 | 1995-09-06 | 新日本制铁株式会社 | Continuous annealing apparatus of steel strip and tension control system for the same |
-
2010
- 2010-02-11 CN CN201010109702.5A patent/CN102154543B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01298120A (en) * | 1988-05-27 | 1989-12-01 | Kawasaki Steel Corp | Method for controlling tension of strip in looper |
| CN1107764A (en) * | 1994-03-02 | 1995-09-06 | 新日本制铁株式会社 | Continuous annealing apparatus of steel strip and tension control system for the same |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406367A (en) * | 2013-08-16 | 2013-11-27 | 中冶南方（武汉）自动化有限公司 | Method for improving direct tension control precision of cold calender |
| CN103406367B (en) * | 2013-08-16 | 2015-08-19 | 中冶南方（武汉）自动化有限公司 | A kind of method improving direct tension control precision of cold calender |
| CN104988301A (en) * | 2015-07-09 | 2015-10-21 | 武汉钢铁(集团)公司 | Annealing furnace interior control method |
| CN106350657A (en) * | 2016-08-29 | 2017-01-25 | 首钢京唐钢铁联合有限责任公司 | Anti-deflection alarm system used in continuous vertical annealing oven |
| CN106381379A (en) * | 2016-08-29 | 2017-02-08 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling tension in annealing furnace |
| CN106381379B (en) * | 2016-08-29 | 2018-09-18 | 首钢京唐钢铁联合有限责任公司 | A kind of annealing furnace internal tension control method and control system |
| CN107142370A (en) * | 2017-06-25 | 2017-09-08 | 苏州金钜松机电有限公司 | A kind of Medium drawing mach ine annealing regulation system |
| CN108229072A (en) * | 2018-02-10 | 2018-06-29 | 东北大学 | Continuous annealing soaking pit strip tension On-line Measuring Method based on data parsing |
| CN108359775A (en) * | 2018-02-27 | 2018-08-03 | 首钢京唐钢铁联合有限责任公司 | The setting method of vertical continuous annealing furnace tension |
| CN109894475A (en) * | 2019-02-28 | 2019-06-18 | 北京首钢股份有限公司 | A kind of cold-rolling continuous annealing equipment degradation trend method for early warning and device |
| CN109894475B (en) * | 2019-02-28 | 2020-08-14 | 北京首钢股份有限公司 | Degradation trend early warning method and device for cold rolling continuous annealing equipment |
| CN110129545A (en) * | 2019-04-28 | 2019-08-16 | 首钢智新迁安电磁材料有限公司 | A kind of method and apparatus improving annealing furnace tension force stability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102154543B (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102154543B (en) | Method for pre-warning tension fall of HF (High Frequency) section of cold-rolling continuous annealing furnace | |
| EP2286935B1 (en) | Steel plate quality assurance system and method | |
| TW401328B (en) | Rolling roll profile control equipment | |
| EP3012460B1 (en) | Systems and methods for monitoring surge conditions | |
| CN103775832A (en) | Transient flow problem method-based oil pipeline dropping detection device | |
| CN204523791U (en) | A kind of belt steel thickness real-time detection apparatus | |
| JP6136743B2 (en) | Method of changing the running plate thickness in cold tandem rolling mills | |
| Bellette et al. | Validation of a tangent track corrugation model with a two disk test rig | |
| CN202083605U (en) | Device for testing abrasive resistance of wrap paper | |
| JP3902585B2 (en) | Sheet shape control method in cold rolling | |
| Tandiono et al. | On the linear and nonlinear development of Görtler vortices | |
| IT202100023153A1 (en) | SYSTEM FOR ADJUSTING THE THICKNESS OF A PLASTIC FILM PRODUCED BY FLAT DIE EXTRUSION PROCESS | |
| Ayuba et al. | Dataset showing steel cold rolling process parameters for a 6-high cold rolling mill in Nigeria | |
| CN102189118B (en) | Method for correcting shape model online based on fixed-length sampling | |
| Sun et al. | Bridge condition assessment based on long-term strain monitoring | |
| CN104475461A (en) | Combination measurement method for elongation rate of online band steel | |
| CN114112736A (en) | Online measuring device and method for determining fracture elongation of low-carbon steel cold-rolled sheet | |
| JP7243944B1 (en) | Method for judging suitability of rolling rolls, method for rolling metal strip, and method for manufacturing cold-rolled steel sheet | |
| CN105583236A (en) | Method for online acquisition of plasticity coefficient of cold-rolled strip steel | |
| WO2023079850A1 (en) | Method for determining conformity of rolling mill roller, method for rolling metal strip, and method for producing cold-rolled steel sheet | |
| CN104237254A (en) | Cold rolling production unit strip steel crescent defect detecting system and method thereof | |
| JP6057774B2 (en) | Identification method of mill elongation formula in rolling mill | |
| Gostelow et al. | Effects of streamwise pressure gradient on turbulent spot development | |
| CN103934286A (en) | Method for online detecting harmful vibration of strip steel in shearing process of disc shear | |
| CN103390114A (en) | Detection judging system and method thereof for thickness precision of band steel finished products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee after: Shanghai Baosteel Industrial Inspection Co.,Ltd. Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: Shanghai Baosteel Industry Inspection Corp. Address after: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee after: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: Shanghai Baosteel Industrial Inspection Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: No. 3520 Tongji Road, Baoshan District, Shanghai, 201900 Patentee after: Baowu equipment Intelligent Technology Co.,Ltd. Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |