CN104923569A - Dynamic calculation method for hot-rolling laminar-cooling strip steel time velocity diagram - Google Patents
Dynamic calculation method for hot-rolling laminar-cooling strip steel time velocity diagram Download PDFInfo
- Publication number
- CN104923569A CN104923569A CN201410106342.1A CN201410106342A CN104923569A CN 104923569 A CN104923569 A CN 104923569A CN 201410106342 A CN201410106342 A CN 201410106342A CN 104923569 A CN104923569 A CN 104923569A
- Authority
- CN
- China
- Prior art keywords
- section
- steel
- dynamic calculation
- hodograph
- laminar
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
Abstract
The invention discloses a dynamic calculation method for a hot-rolling laminar-cooling strip steel time velocity diagram, and the method comprises the steps: 1, designing a dynamic calculation main program for the laminar-cooling strip steel time velocity diagram according to a dynamic calculation rule; 2, designing a pre-judgment subprogram for the laminar-cooling strip steel time velocity diagram according to a rule for the pre-judging whether a TVD segment needs to be calculated or not; 3, designing a calculation subprogram for the laminar-cooling strip steel time velocity diagram. The method achieves the automatic dynamic calculation of the laminar-cooling strip steel time velocity diagram in an operation process of a steel strip when an acceleration or speed is not consistent with a forecast value, so as to guarantee that parameters used by a coiling temperature control module is in real time and accurate. The method is very beneficial to the improvement of coiling temperature control. The method has more significance under the condition that there is no other effect dynamic calculation method for the laminar-cooling strip steel time velocity diagram currently.
Description
Technical field
The present invention relates to course of hot rolling control system, particularly, relate to hot-rolling laminar salband steel time hodograph Dynamic calculation method.
Background technology
In course of hot rolling control system, improving control precision of coiling temperature is one of main target of system.Oiler temperature control (CTC) be one comparatively complicated, generally presetting by the CTC based on Mathematical Modeling, dynamically setting and CTC feedback dynamically set the function of the closed-loop control realization formed in CTC feedforward.The factor affecting control precision of coiling temperature mainly contains band steel at exit temperature at finishing, speed, belt plate shape, section cooling apparatus factor etc.Strip speed be participate in presetting, feedforward dynamically set and feed back dynamic setting model calculate a major parameter, its determine band steel in cooling zone each sprinkling zone by the length (i.e. cool time) of time.Cool time is the major parameter of warm extrusion die, is also a foundation of valve setpoint Array Construction.Therefore, strip speed change is very important on the impact of coiling temperature precision.
So forecast section cooling strip speed becomes a critical function of laminar cooling system.The method adopted leaves finish to gauge frame with section cooling band steel time hodograph forecast band steel, enters the cold cooling zone of layer, then enter the velocity variations situation of coiling machine.The basic definition of the time hodograph of section cooling band steel: complete band steel TVD figure has at most seven sections (segment is called for short Seg later) to form as shown in Figure 1.
Seg0 threading section: band steel to travel at the uniform speed the cold entrance thermometric (EMP) of layer from finish to gauge frame (F7) with threading speed.
Seg1 mono-section of adding: be with steel with the first acceleration (temperature acceleration), till running to coiling machine from EMP.
Seg2 bis-section of adding: after coiling machine is nipped, is with steel with the second acceleration (power acceleration), till running to maximal rate.
Seg3 maximal rate section: band steel travels at the uniform speed with maximal rate deceleration point.
Seg4 throws steel braking section: band steel runs slowly from deceleration point with power deceleration throwing steel speed.
Seg5 exports roller-way at the uniform velocity section: band steel to travel at the uniform speed afterbody deceleration point from throwing steel speed.
Seg6 batches braking section: band steel decelerates to from afterbody deceleration point batch tail speed, until batch end to batch deceleration.
Because of band steel length and steel grade classification reason, each section of Seg2 ~ Seg5 may not can exist.The situation that may occur is see Fig. 2 to Fig. 4.
In process computer system, the method depositing band steel TVD figure preserves each section of characteristic (initial velocity, acceleration, running time and range ability).These characteristics are calculated by the speed control parameter forecast from rolling line and strip length and outlet roller-way length etc.Strip speed controling parameters from rolling line forecast has threading speed, the first acceleration, the second acceleration, the maximum permission speed of service, power deceleration, maximum permission to throw steel speed, batch deceleration and batch tail speed.
In the prior art, the method for employing is before band steel enters cooling zone, and system precomputes the time hodograph (being later called for short layer cold belt steel TVD) of section cooling band steel according to the last frame strip speed controling parameters that rolling precomputation is formed.At band steel by section cooling region process, CTC dynamic control model used all will use this layer of cold belt steel TVD.
This scheme has following problem: 1, require that the speeds control of milling train to band steel strictly follows the speed of its rolling precomputation forecast, the speed that guarantee laminar flow cooling control uses is correct.But in actual production process, due to reasons such as exit temperature at finishing control and rolling rhythms, it is inevitable sometimes that rolling line system automatically or manually adjusts mill speed.2, the other reasons such as equipment also may cause practical rolling speed or coiling speed and forecast speed to have deviation.
Therefore, be necessary, when finding that speed actual achievement and forecast are not inconsistent, not undertaken dynamically calculating again by the time hodograph of part to section cooling band steel.
Through retrieval,
do not find identical or similar report, following pertinent literature is for the reference of understanding section cooling temperature control general principle.
Application number: 201310600841.1, patent name: a kind of section cooling temperature-controlled process and system
This patent document discloses a kind of control method of section cooling temperature, be specially: using the starting and ending place temperature of steel plate slightly cold section and fine cold-leg as constraints, determine the steel plate operation standard speed, slightly cold section and the fine cold-leg standard valve quantity that meet this constraints; Gather steel plate actual motion speed, by it with steel plate operation standard velocity ratio comparatively, according to comparative result adjustment slightly cold section with fine cold-leg valve quantity; Gather the actual initial temperature of slightly cold section of section start, it is compared with steel plate initial temperature, according to comparative result adjustment slightly cold section and fine cold-leg valve quantity; Measure the actual steel plate final cooling temperature of fine cold-leg end, it is compared with target final cooling temperature, according to comparative result adjustment slightly cold section and fine cold-leg valve quantity.
Summary of the invention
For defect of the prior art, the object of the invention is in course of hot rolling control system, the computational methods of laminar flow salband steel time hodograph are provided, especially a kind of under mill speed actual achievement and forecast are not inconsistent situation, hot-rolling laminar salband steel time hodograph is carried out to the method dynamically calculated again, to ensure in course of hot rolling control system in real time, forecast with unerring accuracy section cooling strip speed.The present invention can be widely used in the Process Control System of various hot rolling line.
According to hot-rolling laminar salband steel time hodograph Dynamic calculation method provided by the invention, comprise the steps:
The first step: according to dynamic calculation rule, design laminar flow salband steel time hodograph dynamic calculation main program;
Second step: according to anticipation TVD section the need of the rule calculated, design laminar flow salband steel time hodograph anticipation subprogram;
3rd step: design laminar flow salband steel hodograph counting subroutine.
Preferably, described dynamic calculation rule, is specially:
The subsegment number of-final each target phase depends on acceleration on this target phase or velocity variations number of times;
-when there is acceleration or speed and forecast and not being inconsistent, first to judge which section current band steel operates in, then revise last subsegment data of this target phase, generate new subsegment data, finally recalculate the characteristic of follow-up operation section.
Preferably, described according to the rule of anticipation TVD section the need of calculating, be specially:
When-precomputation or band steel operate in threading section or the section of adding, need calculating one section of adding characteristic;
When-band steel operates in two sections of adding, run if band steel can reach maximal rate, so need to calculate maximal rate section, throw steel braking section and two section of adding characteristics;
When-band steel operates in two sections of adding, if need two sections of adding to throw steel, then need to calculate and throw steel braking section characteristic, otherwise only need calculating two section of adding characteristic;
-always need calculating to batch at the uniform velocity section and batch braking section characteristic.
Compared with prior art, the present invention has following beneficial effect:
Present invention achieves in the process run at band steel, when acceleration or speed and forecast are inconsistent, automatically carry out the dynamic calculation of section cooling band steel time hodograph, with ensure oiler temperature control model parameter in real time with accurate.It is very useful to raising control precision of coiling temperature.When at present also there is no the Dynamic calculation method of other effective section cooling band steel time hodographs, have more meaning.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is that complete band steel TVD schemes;
Fig. 2, Fig. 3, Fig. 4 are that situation schematic diagram may appear in each section of Seg2 ~ Seg5 because of band steel length and steel grade classification reason;
Fig. 5 is the master module processes schematic flow sheet of section cooling band steel time hodograph;
Fig. 6 is section cooling band steel time hodograph anticipation subprogram handling process schematic diagram;
Fig. 7 is section cooling band steel time hodograph counting subroutine handling process schematic diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
The Dynamic calculation method of section cooling band steel time hodograph comprises the dynamic calculation rule of a section cooling band steel time hodograph, an anticipation TVD section is the need of the rule calculated, the dynamic calculation procedure of a section cooling band steel time hodograph is (containing a section cooling band steel time hodograph dynamic calculation main program, a section cooling band steel time hodograph anticipation subprogram, section cooling strip speed figure counting subroutine).Its design process comprises:
The first step: according to dynamic calculation rule, design laminar flow salband steel time hodograph dynamic calculation main program.
Second step: according to anticipation TVD section the need of the rule calculated, design laminar flow salband steel time hodograph anticipation subprogram.
3rd step: design laminar flow salband steel hodograph counting subroutine.
Wherein, the dynamic calculation rule of section cooling band steel time hodograph is as follows:
1, because band steel acceleration or speed occur and forecast the change be not inconsistent, may cause occurring multiple subsegment on a certain target phase or several target phase.The subsegment number of final each target phase depends on acceleration on this section or velocity variations number of times.
2, when acceleration or speed and forecast occurring and not being inconsistent, first to judge which section current band steel operates in, then revise last subsegment data of this target phase, generate new subsegment data.Finally recalculate the characteristic of follow-up operation section.
Wherein, anticipation TVD section is the need of computation rule following (in order):
1, when precomputation or band steel operate in threading section or the section of adding, calculating one section of adding characteristic is needed.
When 2, being with steel to operate in two sections of adding, run if band steel can reach maximal rate, so need to calculate maximal rate section, throw steel braking section and two section of adding characteristics;
When 3, being with steel to operate in two sections of adding, if need two sections of adding to throw steel, then need to calculate and throw steel braking section characteristic, otherwise only need calculating two section of adding characteristic.
4, calculating is always needed to batch at the uniform velocity section and batch braking section characteristic.
Wherein, the dynamic calculation procedure designing laminar flow salband steel time hodograph comprises following steps:
The first step: according to dynamic calculation rule, the primary module of design laminar flow salband steel time hodograph.
Second step: according to anticipation TVD section the need of computation rule, design laminar flow salband steel time hodograph anticipation subprogram.
3rd step: design laminar flow salband steel hodograph counting subroutine.
Below the present invention is described in more detail.
Embodiment 1: certain laminar flow cooling control system (operating system windows2003, programming language C++).
Specific implementation:
Section cooling band steel time hodograph Dynamic calculation method of the present invention, comprise a section cooling band steel time hodograph dynamic calculation main program according to dynamic calculation Design with Rule, a band steel time hodograph anticipation subprogram according to anticipation Design with Rule and a band steel time hodograph counting subroutine.
Describedly comprise a section cooling band steel time hodograph dynamic calculation main program, its handling process following (see accompanying drawing 5):
The first step, is initialized as 0 by each section of calculation flag.
Second step, does is judgement precomputation or dynamic calculation? precomputation in this way, performs the 3rd step, in this way dynamic calculation, performs the 4th step.
3rd step, pre-calculated data prepares: fetch equipment location parameter, the mill speed controling parameters of rolling line budget; Using threading speed as calculating initial velocity, putting threading section calculation flag is 1, and arranging band steel current place section is threading section.
4th step, dynamic calculation data encasement: using current strip speed as calculating initial velocity, read TVD characteristic table, according to the strip length that the current strip length that passes through of F7 or coiling machine batch, calculates the target phase at current band steel place.Current acceleration is as subsequent calculations acceleration.
5th step, with calculating initial velocity and calculating acceleration as parameter call TVD anticipation subprogram.
6th step, checks each section of calculation flag, as there is the mark equaling 1, performs the 7th step; Otherwise terminate.
7th step, calls TVD counting subroutine.
8th step, upgrades TVD segment data table: after last subsegment of table Central Plains present segment and subsequent segment data being deleted, and connects the correction section of sequence write present segment and new subsegment data and subsequent segment data.
Describedly comprise a band steel time hodograph anticipation subprogram according to anticipation Design with Rule, its handling process following (see accompanying drawing 6):
The first step, judges which target phase band steel operates on.
As in threading section or the section of adding, calculating the section of adding end speed juxtaposition one section of an adding calculation flag is 1, performs second step.
As in two sections of adding, arranging two, to add initial velocity be current band steel actual speed, performs second step.
As thrown steel braking section, so, putting and throwing steel braking section calculation flag is 1, performs the 7th step.
As exported at the uniform velocity section, so performing the 7th step.
Otherwise returning each section of calculation flag is 0.
Second step, calculates removing threading section, the section of adding, exports at the uniform velocity section and batch braking section, the residue length of band steel.Judge whether residual strip is greater than 0, in this way, when estimation can reach maximal rate respectively, the length of two sections of adding and throwing steel braking section; Otherwise perform the 7th step.
3rd step, judges whether residual strip length is more than or equal to two and adds segment length, in this way, performs the 4th step; Otherwise perform the 5th step.
4th step, judge that two add end speed and whether are more than or equal to maximal rate, in this way, putting maximal rate section calculation flag is 1, performs the 6th step; Otherwise perform the 6th step.
5th step, judges that two add end speed and whether are more than or equal to and throw steel speed, in this way, performs the 6th step; Otherwise putting two section of adding calculation flag is 1, perform the 7th step.
6th step, putting two sections of adding respectively and throwing steel braking section calculation flag is 1.
7th step, putting at the uniform velocity section is respectively 1 with batching braking section calculation flag.
8th step, returns each section of calculation flag.
Describedly comprise a band steel time hodograph counting subroutine, its handling process following (see accompanying drawing 7):
The first step, judges the whether set of threading section calculation flag, in this way, calculates threading segment data.
Second step, judges the section of an adding calculation flag whether set, in this way, calculates one and adds segment data.
3rd step, judges the whether set of two section of adding calculation flag, if two section of adding calculation flag are 1, judges whether maximal rate segment mark is set, perform the 4th step in this way, otherwise perform the 5th step; If two section of adding calculation flag are 0, perform the 6th step.
4th step, first, calculates band steel in two section of adding service datas.Then, calculate band steel and decelerated to the throwing steel braking section data of throwing steel speed by maximal rate.Finally, band steel is calculated in maximal rate section service data.Forward the 7th step to.
5th step, judge to throw the whether set of steel braking section calculation flag, in this way, judge whether two section of adding speed are greater than and throw steel speed, in this way, first calculate and throw steel braking section data, then calculating two adds segment data; Otherwise only calculate two and add segment data.Forward the 7th step to.
6th step, judges to throw the whether set of steel braking section calculation flag, calculates in this way and throw steel braking section data.
7th step, calculates and exports at the uniform velocity segment data.
8th step, calculates and batches braking section data.
9th step, returns each segment data of calculating.
After the program designed according to the above is run, to the adjustment result sample of section cooling band steel time hodograph as shown in appendix 1.
Subordinate list 1: band steel time hodograph is rear characteristic contrast table before adjustment
Note: 1. when actual measureed value of acceleration changes, correcting reason is finish rolling speed governing.
2. acceleration is constant, and when the deviation of surveying speed and precomputation speed is greater than 0.03m/s, correcting reason is velocity correction.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (3)
1. a hot-rolling laminar salband steel time hodograph Dynamic calculation method, is characterized in that, comprise the steps:
The first step: according to dynamic calculation rule, design laminar flow salband steel time hodograph dynamic calculation main program;
Second step: according to anticipation TVD section the need of the rule calculated, design laminar flow salband steel time hodograph anticipation subprogram;
3rd step: design laminar flow salband steel hodograph counting subroutine.
2. hot-rolling laminar salband steel time hodograph Dynamic calculation method according to claim 1, is characterized in that, described dynamic calculation rule, is specially:
The subsegment number of-final each target phase depends on acceleration on this target phase or velocity variations number of times;
-when there is acceleration or speed and forecast and not being inconsistent, first to judge which section current band steel operates in, then revise last subsegment data of this target phase, generate new subsegment data, finally recalculate the characteristic of follow-up operation section.
3. hot-rolling laminar salband steel time hodograph Dynamic calculation method according to claim 1, is characterized in that, described according to the rule of anticipation TVD section the need of calculating, is specially:
When-precomputation or band steel operate in threading section or the section of adding, need calculating one section of adding characteristic;
When-band steel operates in two sections of adding, run if band steel can reach maximal rate, so need to calculate maximal rate section, throw steel braking section and two section of adding characteristics;
When-band steel operates in two sections of adding, if need two sections of adding to throw steel, then need to calculate and throw steel braking section characteristic, otherwise only need calculating two section of adding characteristic;
-always need calculating to batch at the uniform velocity section and batch braking section characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106342.1A CN104923569B (en) | 2014-03-20 | 2014-03-20 | Hot-rolling laminar cools down strip time hodograph Dynamic calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106342.1A CN104923569B (en) | 2014-03-20 | 2014-03-20 | Hot-rolling laminar cools down strip time hodograph Dynamic calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104923569A true CN104923569A (en) | 2015-09-23 |
| CN104923569B CN104923569B (en) | 2017-06-23 |
Family
ID=54111177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410106342.1A Active CN104923569B (en) | 2014-03-20 | 2014-03-20 | Hot-rolling laminar cools down strip time hodograph Dynamic calculation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104923569B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798320A (en) * | 2021-08-19 | 2021-12-17 | 武汉钢铁有限公司 | Method and system for controlling finish rolling speed of strip steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0390206A (en) * | 1989-08-31 | 1991-04-16 | Kobe Steel Ltd | Control method for cooling of hot rolled steel plate |
| JP2004160532A (en) * | 2002-11-15 | 2004-06-10 | Nippon Steel Corp | Hot-rolled steel strip cooling control method |
| CN101433919A (en) * | 2008-07-17 | 2009-05-20 | 东北大学 | Control method for laminar cooling of medium plate |
| CN101462126A (en) * | 2007-12-21 | 2009-06-24 | 株式会社日立制作所 | Coiling temperature control apparatus and control method |
| CN102125937A (en) * | 2010-01-14 | 2011-07-20 | 宝山钢铁股份有限公司 | Temperature control method in hot-rolled strip tailing-out process |
| CN102294366A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Dynamic control method for online cooling control system of medium-thickness steel plate |
-
2014
- 2014-03-20 CN CN201410106342.1A patent/CN104923569B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0390206A (en) * | 1989-08-31 | 1991-04-16 | Kobe Steel Ltd | Control method for cooling of hot rolled steel plate |
| JP2004160532A (en) * | 2002-11-15 | 2004-06-10 | Nippon Steel Corp | Hot-rolled steel strip cooling control method |
| CN101462126A (en) * | 2007-12-21 | 2009-06-24 | 株式会社日立制作所 | Coiling temperature control apparatus and control method |
| CN101433919A (en) * | 2008-07-17 | 2009-05-20 | 东北大学 | Control method for laminar cooling of medium plate |
| CN102125937A (en) * | 2010-01-14 | 2011-07-20 | 宝山钢铁股份有限公司 | Temperature control method in hot-rolled strip tailing-out process |
| CN102294366A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Dynamic control method for online cooling control system of medium-thickness steel plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798320A (en) * | 2021-08-19 | 2021-12-17 | 武汉钢铁有限公司 | Method and system for controlling finish rolling speed of strip steel |
| CN113798320B (en) * | 2021-08-19 | 2023-10-31 | 武汉钢铁有限公司 | Strip steel finish rolling speed control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104923569B (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103894425B (en) | The control method of finishing temperature and device | |
| CN102125937B (en) | Temperature control method in hot-rolled strip tailing-out process | |
| JP2018509301A (en) | Rolling method for sheet materials with different longitudinal thickness | |
| CN102389902B (en) | Sectional cooling control method for emulsion of working roller of single-frame rolling mill | |
| CN105522003A (en) | Sectional cooling control method for low-cost hot-rolled strip steel | |
| CN104874613B (en) | Compensated the method realizing second flow balance between hot continuous rolling frame by rolling mill speed | |
| CN106862283B (en) | The ultrafast cold Process Control System of hot rolling | |
| CN105327949A (en) | Flow control method for rolling temperature of hot rolled steel strip | |
| JP2008149354A (en) | Device and method for controlling winding temperature | |
| CN104841701B (en) | Method for controlling sheet coiling temperature during large-deceleration rolling of hot-rolled strip steel | |
| CN104801551A (en) | Hot continuous rolling strip thick plate coiling temperature control method | |
| CN107695108B (en) | A kind of tensile stress dynamic compensation method improving rolling process stability | |
| CN109590328A (en) | A kind of bar segmentation lines difference fast adjustment method | |
| CN105414205A (en) | PLC-based online predication method for temperatures of steel plates | |
| CN104923569A (en) | Dynamic calculation method for hot-rolling laminar-cooling strip steel time velocity diagram | |
| CN107282650B (en) | A kind of high acceleration control method guaranteeing finishing temperature | |
| CN109926452A (en) | Course control method for use, process control equipment and terminal applied to steel rolling | |
| US11230749B2 (en) | Method for operating an annealing furnace | |
| CN105855298B (en) | A kind of high-precision boron-containing steel hot-rolling draught pressure computational methods | |
| CN103464470B (en) | Hot continuous rolling necking compensation control method | |
| CN1329134C (en) | Method for regulating the temperature of a metal strip, especially in a cooling path | |
| CN108655176A (en) | Cold rolling forward slip model self-adaptive computing method for stable rolling | |
| CN104324950B (en) | A kind of rolling system and its method | |
| CN108971236A (en) | A kind of draught pressure forecast method of hot continuous rolling composite strip | |
| CN113798320A (en) | Method and system for controlling finish rolling speed of strip steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |