EP3167974B1 - Sector shaped section continuous casting machine for heavy reduction and corresponding heavy reduction method - Google Patents
Sector shaped section continuous casting machine for heavy reduction and corresponding heavy reduction method Download PDFInfo
- Publication number
- EP3167974B1 EP3167974B1 EP14897138.5A EP14897138A EP3167974B1 EP 3167974 B1 EP3167974 B1 EP 3167974B1 EP 14897138 A EP14897138 A EP 14897138A EP 3167974 B1 EP3167974 B1 EP 3167974B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cast slab
- reduction
- driven roller
- roller set
- clamping
- 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.)
- Active
Links
- 230000009467 reduction Effects 0.000 title claims description 70
- 238000009749 continuous casting Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 15
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000005266 casting Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1284—Horizontal removing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
Definitions
- the present invention relates to the technical field of slab casting, in particular to a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof.
- the technology for heavy reduction of the solidified terminal of the continuously cast slabs refers to a process of arranging screw-down rollers at a solidified terminal of a continuously cast slab on a continuous casting line, applying heavy-reduction deformation (5-20mm to the cast slab when the solid phase rate of the center of the cast slab exceeds 80%, and then performing normal rolling production.
- the technology can obviously improve the center quality (improve macro-structure, shrink holes, looseness, segregation, etc.) of the continuously cast slabs, and can produce quality extra-thick products with a thickness of over 100mm at a relatively low compression ratio (1.5-2.5).
- the contact area obviously increases while 5-7 pairs of casting rollers of the sector-shaped section contact the slab at the same time, followed by the obvious increase in the load, so the strength and rigidity of the sector-shaped section must be greatly enhanced to resist the large load on and large elastic deformation of the sector-shaped section and the segmented roller (or casting roller).
- the segmented roller is comprised of a roll collar, a core shaft and a middle support bearing base, which greatly increases the dimension and weight of the sector-shaped section, thus causing a series of new problems to the lifting, assembling and maintenance of the sector-shaped section.
- a document with patent JPH01205861A has disclosed a control method of slab clamping force for continuous casting equipment, it is a continuous casting of metal slabs that formed slabs were delivered by guiding rollers and continuously lightly pressed. The same roll diameters are limited, the roll screwdown mode is also limited to a step-by-step light screwdown mode.
- the technical problem to be solved by the present invention is to provide a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof, to overcome defects in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, and trend of cracking in the middle of the cast slab when the sector-shaped section of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal.
- an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, comprising an upper frame, a lower frame, an upper driving roller, a lower driving roller, a left driven roller set, a right driven roller set, a screw-down gear and clamping cylinders which are positioned on the sector-shaped section of the continuous casting machine.
- the clamping cylinders are used for clamping the upper frame and the lower frame and keeping the upper frame and the lower frame at a set interval.
- the upper driving roller is connected with the screw-down gear.
- the upper driving roller is connected to the upper frame through an upper bearing base.
- the lower driving roller is connected to the lower frame through a lower bearing base.
- the left driven roller set and the right driven roller set are respectively positioned on two sides of the driving rollers.
- the left driven roller set is used for clamping the cast slab before reduction.
- the right driven roller set is used for clamping the cast slab after reduction.
- the diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1.
- the opening degrees of the right driven roller set and the driving rollers are identical with the thickness of the cast slab after reduction.
- the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction.
- the driving rollers are integrated and manufactured through an integral forming process.
- the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, characterized by comprising the following steps:
- the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
- Screw-down gear 2: Upper frame; 3: Upper driving roller; 4: Upper bearing base; 5: Lower driving roller; 6: Lower bearing base; 7: Lower frame; 8: Left driven roller set; 9: Right driven roller set; 10: Clamping cylinder; 11: Transmission device.
- the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof to solve problems in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, the trend of cracking in the middle of the cast slab when the soft reduction system of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal of the sector-shaped section.
- an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, including an upper frame 2, a lower frame 7, an upper driving roller 3, a lower driving roller 5, a left driven roller set, 8, a right driven roller set 9, a screw-down gear 1 and clamping cylinders 10 which are positioned on the sector-shaped section of the continuous casting machine.
- the clamping cylinders 10 are used for clamping the upper frame 2 and the lower frame 7 and keeping the upper frame 2 and the lower frame 7 at a set interval.
- the driving rollers and the driven rollers are driven to rotate by a transmission device 11, thus driving the cast slab to move forward.
- the upper driving roller 3 is connected with the screw-down gear 1.
- the upper driving roller 3 is connected to the upper frame 2 through an upper bearing base 4.
- the lower driving roller 5 is connected to the lower frame 7 through a lower bearing base 6.
- the left driven roller set 8 and the right driven roller set 9 are respectively positioned on two sides of the driving rollers.
- the left driven roller set 8 is used for clamping the cast slab before reduction.
- the right driven roller set 9 is used for clamping the cast slab after reduction.
- the diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1.
- the opening degrees of the right driven roller set 9 and the driving rollers are identical with the thickness of the cast slab after reduction.
- the opening degree of the left driven roller set 8 is identical with the thickness of the cast slab before reduction.
- the driving rollers are integrated and manufactured through an integral forming process.
- the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, including the following steps:
- the driving rollers of the present invention are large-diameter integrated driving rollers (namely, not segmented rollers assembled by roll collars, core shafts and middle support bearing bases). Meanwhile, considering the increase in loads when the heavy reduction is implemented, the strength and rigidity of the upper frame 2 and the lower frame 7 of the sector-shaped section are enhanced (by 2-5 times), and the bearing capabilities of the four clamping cylinders 10 are correspondingly enhanced (by 2-5 times).
- the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Metal Rolling (AREA)
Description
- The present invention relates to the technical field of slab casting, in particular to a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof.
- The technology for heavy reduction of the solidified terminal of the continuously cast slabs refers to a process of arranging screw-down rollers at a solidified terminal of a continuously cast slab on a continuous casting line, applying heavy-reduction deformation (5-20mm to the cast slab when the solid phase rate of the center of the cast slab exceeds 80%, and then performing normal rolling production. The technology can obviously improve the center quality (improve macro-structure, shrink holes, looseness, segregation, etc.) of the continuously cast slabs, and can produce quality extra-thick products with a thickness of over 100mm at a relatively low compression ratio (1.5-2.5).
- When heavy reduction is applied to the solidified terminal of the continuously cast slab, if the sector-shaped section of a casting machine adopts overall heavy reduction, the contact area obviously increases while 5-7 pairs of casting rollers of the sector-shaped section contact the slab at the same time, followed by the obvious increase in the load, so the strength and rigidity of the sector-shaped section must be greatly enhanced to resist the large load on and large elastic deformation of the sector-shaped section and the segmented roller (or casting roller). The segmented roller is comprised of a roll collar, a core shaft and a middle support bearing base, which greatly increases the dimension and weight of the sector-shaped section, thus causing a series of new problems to the lifting, assembling and maintenance of the sector-shaped section. Besides, the heavy reduction is carried out near the solidified terminal of the continuously cast slab, and the deformation (strain) generated when the multiple pairs of roller of the heavy reduction sector-shaped section perform small-deformation reduction is of poor permeability, and the strain transmitted to the center area of the continuously casting slab is small, which cannot better help improve the looseness and segregation defects of the center area. A document with patent
JPH01205861A - Therefore, when the soft reduction system of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal of the sector-shaped section of the continuous casting machine, problems including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, and the trend of cracking in the middle of the cast slab appear.
- The technical problem to be solved by the present invention is to provide a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof, to overcome defects in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, and trend of cracking in the middle of the cast slab when the sector-shaped section of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal.
- To solve the above technical problems, an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, comprising an upper frame, a lower frame, an upper driving roller, a lower driving roller, a left driven roller set, a right driven roller set, a screw-down gear and clamping cylinders which are positioned on the sector-shaped section of the continuous casting machine. The clamping cylinders are used for clamping the upper frame and the lower frame and keeping the upper frame and the lower frame at a set interval. The upper driving roller is connected with the screw-down gear. The upper driving roller is connected to the upper frame through an upper bearing base. The lower driving roller is connected to the lower frame through a lower bearing base. The left driven roller set and the right driven roller set are respectively positioned on two sides of the driving rollers. The left driven roller set is used for clamping the cast slab before reduction. The right driven roller set is used for clamping the cast slab after reduction. The diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1.
- According to the present invention, the opening degrees of the right driven roller set and the driving rollers are identical with the thickness of the cast slab after reduction.
- According to the present invention, the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction.
- According to the present invention, the driving rollers are integrated and manufactured through an integral forming process.
- To solve the above technical problems, the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, characterized by comprising the following steps:
- (1) applying a certain pressure to the upper frame via the clamping cylinders such that the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction, and clamping the cast slab before reduction via the clamping cylinders;
- (2) setting the rolling reduction to 5-20mm, operating the screw-down gear to drive the driving rollers to apply heavy reduction onto the cast slab and to deform the cast slab;
- (3) adjusting the right driven roller set such that the opening degree thereof equals the interval between the upper and lower driving rollers, and clamping the cast slab after reduction by the right driven roller set.
- In the above solution, the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
- The technical solution of the present invention has the following beneficial effects:
- 1. The contact area is reduced during the plastic deformation, and only the large-diameter integrated driving rollers screw down, so the total deformation force is obviously reduced.
- 2. The clamping force added via the clamping cylinders of the sector-shaped section is correspondingly reduced; meanwhile, structural materials and weight added to maintain the strength and the rigidity in the process of implementing the heavy reduction by the upper and lower sector-shaped sections are also reduced.
- 3. The deformation permeability is increased, equivalent to the deformation of one rolling pass of a two-roller mill with a relatively large roller diameter, which facilitates improvement on the looseness and segregation of the center area of the continuously cast slab.
-
-
FIG. 1 is a front view of a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab of an embodiment of the present invention; -
FIG. 2 is a lateral view of a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab of an embodiment of the present invention; and -
FIG. 3 is a schematic diagram of a heavy reduction method for a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab of an embodiment of the present invention. - 1. Screw-down gear; 2: Upper frame; 3: Upper driving roller; 4: Upper bearing base; 5: Lower driving roller; 6: Lower bearing base; 7: Lower frame; 8: Left driven roller set; 9: Right driven roller set; 10: Clamping cylinder; 11: Transmission device.
- In order to clarify the technical problems to be solved, the technical solution and the advantage of the present invention, the present invention is described in detail below in conjunction with the attached drawings and specific embodiments.
- The present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof to solve problems in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, the trend of cracking in the middle of the cast slab when the soft reduction system of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal of the sector-shaped section.
- As shown in
FIG.1 andFIG.2 , an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, including anupper frame 2, alower frame 7, anupper driving roller 3, alower driving roller 5, a left driven roller set, 8, a right drivenroller set 9, a screw-downgear 1 andclamping cylinders 10 which are positioned on the sector-shaped section of the continuous casting machine. Theclamping cylinders 10 are used for clamping theupper frame 2 and thelower frame 7 and keeping theupper frame 2 and thelower frame 7 at a set interval. The driving rollers and the driven rollers are driven to rotate by atransmission device 11, thus driving the cast slab to move forward. Theupper driving roller 3 is connected with the screw-downgear 1. Theupper driving roller 3 is connected to theupper frame 2 through an upper bearingbase 4. Thelower driving roller 5 is connected to thelower frame 7 through alower bearing base 6. The left driven roller set 8 and the right drivenroller set 9 are respectively positioned on two sides of the driving rollers. The left drivenroller set 8 is used for clamping the cast slab before reduction. The right drivenroller set 9 is used for clamping the cast slab after reduction. The diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1. - The opening degrees of the right driven roller set 9 and the driving rollers are identical with the thickness of the cast slab after reduction. The opening degree of the left driven
roller set 8 is identical with the thickness of the cast slab before reduction. The driving rollers are integrated and manufactured through an integral forming process. - As shown in
FIG.3 , the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, including the following steps: - (1) applying a certain pressure to the
upper frame 2 via the clamping cylinders such that the opening degree of the left drivenroller set 8 is identical with the thickness of the cast slab before reduction, and clamping the cast slab before reduction via the clamping cylinders; - (2) setting the rolling reduction to 5-20mm, operating the screw-down
gear 1 to drive the driving rollers to apply heavy reduction onto the cast slab and to deform the cast slab; - (3) adjusting the right driven
roller set 9 such that the opening degree thereof equals the interval between the upper and lower driving rollers, and clamping the cast slab after reduction by the right driven roller set. In this way, the reduction and deformation are only carried out by the large-diameter integrated drivingroller 3, while the right drivenrollers 9 on the exit side do not screw down and implement deformation. Such reduction mode is similar to the rolling deformation of the cast slab carried out by the two-roller mill. - The driving rollers of the present invention are large-diameter integrated driving rollers (namely, not segmented rollers assembled by roll collars, core shafts and middle support bearing bases). Meanwhile, considering the increase in loads when the heavy reduction is implemented, the strength and rigidity of the
upper frame 2 and thelower frame 7 of the sector-shaped section are enhanced (by 2-5 times), and the bearing capabilities of the four clampingcylinders 10 are correspondingly enhanced (by 2-5 times). - In the above solution, the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
- The technical solution of the present invention has the following beneficial effects:
- 1. The contact area is reduced during the plastic deformation, and only the large-diameter integrated driving rollers screw down, so the total deformation force is obviously reduced.
- 2. The clamping force added via the clamping cylinders of the sector-shaped section is correspondingly reduced; meanwhile, structural materials and weight added to maintain the strength and the rigidity in the process of implementing the heavy reduction by the upper and lower sector-shaped sections are also reduced.
- 3. The deformation permeability is increased, equivalent to the deformation of one rolling pass of a two-roller mill with a relatively large roller diameter, which facilitates improvement on the looseness and segregation of the center area of the continuously cast slab.
- The above embodiments are just preferable embodiments of the present invention. It should be noted that, for those ordinarily skilled in the art, various improvements and changes can be made on the basis of the principle of the present invention. The improvements and changes shall also fall within the protective scope of the present invention, which scope is defined by the appended claims.
Claims (2)
- A sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, comprising an upper frame, a lower frame, an upper driving roller, a lower driving roller, a left driven roller set, a right driven roller set, a screw-down gear and clamping cylinders which are positioned on the sector-shaped section of the continuous casting machine, characterized in that the clamping cylinders are used for clamping the upper frame and the lower frame and keeping the upper frame and the lower frame at a set interval; the upper driving roller is connected with the screw-down gear; the upper driving roller is connected to the upper frame through an upper bearing base; the lower driving roller is connected to the lower frame through a lower bearing base; the left driven roller set and the right driven roller set are respectively positioned on two sides of the driving rollers; the left driven roller set is used for clamping the cast slab before reduction; the right driven roller set is used for clamping the cast slab after reduction; and the diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1;
wherein the opening degrees of the right driven roller set and the driving rollers are identical with the thickness of the cast slab after reduction;
wherein the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction;
wherein the driving rollers are integrated and manufactured through an integral forming process. - A method for heavy reduction of a solidified terminal of a continuously cast slab, characterized by comprising the following steps:(1) applying a certain pressure to the upper frame via the clamping cylinders such that the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction, and clamping the cast slab before reduction via the clamping cylinders;(2) setting the rolling reduction to 5-20mm, operating the screw-down gear to drive the driving rollers to apply heavy reduction onto the cast slab and to deform the cast slab;(3) adjusting the right driven roller set such that the opening degree thereof equals the interval between the upper and lower driving rollers, and clamping the cast slab after reduction by the right driven roller set.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410325414.1A CN104057049B (en) | 2014-07-09 | 2014-07-09 | The continuous casting machine fan-shaped segment of the big pressure of continuous casting billet solidifying end and big reduction method thereof |
PCT/CN2014/087369 WO2016004682A1 (en) | 2014-07-09 | 2014-09-25 | Continuous casting machine sector section for deep pressing of continuous casting blank solidification tail end and deep pressing method for continuous casting blank solidification tail end |
Publications (4)
Publication Number | Publication Date |
---|---|
EP3167974A1 EP3167974A1 (en) | 2017-05-17 |
EP3167974A4 EP3167974A4 (en) | 2018-04-25 |
EP3167974B1 true EP3167974B1 (en) | 2020-01-22 |
EP3167974B8 EP3167974B8 (en) | 2020-04-08 |
Family
ID=51545144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14897138.5A Active EP3167974B8 (en) | 2014-07-09 | 2014-09-25 | Sector shaped section continuous casting machine for heavy reduction and corresponding heavy reduction method |
Country Status (6)
Country | Link |
---|---|
US (1) | US20170113266A1 (en) |
EP (1) | EP3167974B8 (en) |
JP (1) | JP6541043B2 (en) |
KR (1) | KR20170021872A (en) |
CN (1) | CN104057049B (en) |
WO (1) | WO2016004682A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104057049B (en) * | 2014-07-09 | 2016-06-15 | 北京科技大学 | The continuous casting machine fan-shaped segment of the big pressure of continuous casting billet solidifying end and big reduction method thereof |
CN105689664B (en) * | 2014-11-27 | 2017-11-28 | 宝钢工程技术集团有限公司 | Fan-shaped section and its application method under weight for improving the loose shrinkage cavity defect of slab |
CN106141127A (en) * | 2015-04-17 | 2016-11-23 | 宝钢工程技术集团有限公司 | Continuous casting producing method under weight |
CN104858383A (en) * | 2015-06-10 | 2015-08-26 | 中冶连铸技术工程有限责任公司 | Slab pressing segment |
CN106552912A (en) * | 2016-11-28 | 2017-04-05 | 东北大学 | The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end |
CN106623834B (en) * | 2016-12-22 | 2019-04-05 | 中冶京诚工程技术有限公司 | Sector section device for continuous casting slab heavy pressing |
CN109926554A (en) * | 2017-12-19 | 2019-06-25 | 宝钢工程技术集团有限公司 | A kind of fan-shaped section and its application method of improvement and elimination slab internal defect |
CN108788041B (en) * | 2018-07-03 | 2020-01-03 | 东北大学 | Sector section roller row structure for continuous casting solidification tail end heavy pressing and using method |
CN109261922B (en) * | 2018-10-26 | 2020-11-06 | 中国重型机械研究院股份公司 | Casting blank production process of solidification tail end large-reduction continuous casting machine |
CN109434056A (en) * | 2018-12-05 | 2019-03-08 | 东北大学 | A kind of double single-point weight soft reduction process of continuous casting billet solidifying end |
CN109465415A (en) * | 2018-12-07 | 2019-03-15 | 东北大学 | Fan-shaped section roll array structure under a kind of double single-point weight in continuous casting and solidifying end |
CN110181016B (en) * | 2019-05-27 | 2024-03-29 | 北京首钢国际工程技术有限公司 | 2+8 roller combined thick plate blank large-pressure casting and rolling machine |
CN110227806B (en) * | 2019-05-27 | 2024-05-14 | 北京首钢国际工程技术有限公司 | Device for greatly pressing solidification tail end of casting-rolling type continuous casting machine |
CN113843400A (en) | 2020-06-25 | 2021-12-28 | 宝山钢铁股份有限公司 | Slab cooling and reduction method for improving quality of casting blank |
CN113600775A (en) * | 2021-08-26 | 2021-11-05 | 新疆八一钢铁股份有限公司 | Slab continuous casting machine slab stagnation rapid treatment method |
CN115090840B (en) * | 2022-06-28 | 2023-06-16 | 武汉钢铁有限公司 | Online monitoring and out-of-tolerance judging system for deformation of sector section mounting base of continuous casting machine |
CN116422852B (en) * | 2023-06-12 | 2023-11-17 | 中国重型机械研究院股份公司 | Seven-roller large-reduction sector control model for continuous casting of super-thick plate |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01205861A (en) * | 1988-02-10 | 1989-08-18 | Nippon Steel Corp | Method for controlling clamping force of cast slab in continuous casting equipment |
US4901785A (en) * | 1988-07-25 | 1990-02-20 | Hazelett Strip-Casting Corporation | Twin-belt continuous caster with containment and cooling of the exiting cast product for enabling high-speed casting of molten-center product |
JP3304885B2 (en) * | 1998-07-09 | 2002-07-22 | 住友金属工業株式会社 | Roll reduction equipment in continuous casting equipment |
JP2001113349A (en) * | 1999-10-15 | 2001-04-24 | Sumitomo Metal Ind Ltd | Rolling reduction device in continuous casting equipment |
AT3953U3 (en) * | 2000-06-02 | 2001-04-25 | Voest Alpine Ind Anlagen | STRING GUIDING ELEMENT AND STRING GUIDING SEGMENT WITH INTEGRATED STRING GUIDING ELEMENT |
JP4555183B2 (en) * | 2005-07-15 | 2010-09-29 | 株式会社神戸製鋼所 | Manufacturing method of forming aluminum alloy sheet and continuous casting apparatus for forming aluminum alloy |
US8245760B2 (en) * | 2007-11-19 | 2012-08-21 | Posco | Continuous cast slab and method for manufacturing the same |
AT506549B1 (en) * | 2008-03-28 | 2011-06-15 | Siemens Vai Metals Tech Gmbh | TRAIN TOUR SEGMENT |
CN201211554Y (en) * | 2008-06-20 | 2009-03-25 | 中冶赛迪工程技术股份有限公司 | Sector section equipment |
CN201275608Y (en) * | 2008-10-27 | 2009-07-22 | 上海宝钢设备检修有限公司 | Continuous casting roll system device of slab casting machine sector segment |
CN201410546Y (en) * | 2009-06-19 | 2010-02-24 | 中冶赛迪工程技术股份有限公司 | Fan-shaped segment |
CN102500747B (en) * | 2011-11-15 | 2014-04-02 | 田志恒 | Online detection system for solid-phase internal boundaries and solidification end positions of continuous casting blanks and method |
CN202447621U (en) * | 2011-12-08 | 2012-09-26 | 武汉重冶重工科技有限公司 | Segment frame structure of slab continuous casting machine |
CN202447620U (en) * | 2011-12-08 | 2012-09-26 | 武汉重冶重工科技有限公司 | Fan-shaped section equipment of plate blank continuous casting machine |
KR101376574B1 (en) * | 2011-12-28 | 2014-04-02 | (주)포스코 | Roll gap-checking apparatus for continuous casting plant |
CN102921914B (en) * | 2012-12-01 | 2014-06-04 | 新余钢铁集团有限公司 | Heavy reduction technology for improving center segregation and center porosity of super-thick slabs |
CN103878331A (en) * | 2014-03-27 | 2014-06-25 | 中国重型机械研究院股份公司 | Sector segment structure capable of compositely pressing continuous casting solidification tail end of extra-thick plate |
KR101892838B1 (en) * | 2014-05-14 | 2018-08-28 | 신닛테츠스미킨 카부시키카이샤 | Continuous casting method for slab |
CN203944809U (en) * | 2014-07-09 | 2014-11-19 | 北京科技大学 | The continuous casting machine fan-shaped segment that continuous casting billet solidifying end is depressed greatly |
CN104057049B (en) * | 2014-07-09 | 2016-06-15 | 北京科技大学 | The continuous casting machine fan-shaped segment of the big pressure of continuous casting billet solidifying end and big reduction method thereof |
-
2014
- 2014-07-09 CN CN201410325414.1A patent/CN104057049B/en active Active
- 2014-09-25 WO PCT/CN2014/087369 patent/WO2016004682A1/en active Application Filing
- 2014-09-25 JP JP2017501264A patent/JP6541043B2/en active Active
- 2014-09-25 KR KR1020177002175A patent/KR20170021872A/en not_active Application Discontinuation
- 2014-09-25 EP EP14897138.5A patent/EP3167974B8/en active Active
-
2017
- 2017-01-09 US US15/401,325 patent/US20170113266A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20170113266A1 (en) | 2017-04-27 |
EP3167974A4 (en) | 2018-04-25 |
WO2016004682A1 (en) | 2016-01-14 |
JP2017532202A (en) | 2017-11-02 |
KR20170021872A (en) | 2017-02-28 |
JP6541043B2 (en) | 2019-07-10 |
CN104057049A (en) | 2014-09-24 |
EP3167974B8 (en) | 2020-04-08 |
CN104057049B (en) | 2016-06-15 |
EP3167974A1 (en) | 2017-05-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3167974B1 (en) | Sector shaped section continuous casting machine for heavy reduction and corresponding heavy reduction method | |
CN104399923B (en) | A kind of method producing special heavy plate continuous casting billet | |
CN105618481B (en) | Equipment and process for conducting protruding roller rolling through continuous casting slab waste heat | |
WO2015176515A1 (en) | Production technology for screw-thread steel bar with three ribbed sides | |
WO2013105670A1 (en) | Cast piece reduction device | |
CN109848383B (en) | Flexible reduction method for improving internal quality of casting blank | |
CN109332389B (en) | Method for cross rolling of magnesium alloy | |
CN104889354B (en) | Method for controlling torque of withdrawing and straightening machines for improving screw-down effects for solidification tail ends of continuous casting slabs | |
CN201329366Y (en) | Eight-roll mill | |
CN204975250U (en) | To chamfer continuous casting billet bight carrying out smooth equipment | |
CN104985149A (en) | Integrated-shaft and three-roller corner rolling device for continuous casting billet corner rolling | |
DE102010007660B4 (en) | continuous casting machine | |
CN108788041B (en) | Sector section roller row structure for continuous casting solidification tail end heavy pressing and using method | |
KR20090069822A (en) | '?'type steel manufacturing method | |
EP2869945B1 (en) | Continuously operating casting and rolling system | |
CN106141127A (en) | Continuous casting producing method under weight | |
CN108465708A (en) | Roller knife spreading formula descaler for steel billet | |
CN202180089U (en) | Torsion preventing device of blooming mill for directly producing finished products of round steel | |
CN203091705U (en) | Casting blank deviation prevention device for multi-strand square, circular and rectangular blank continuous casting machine | |
CN208066973U (en) | Roller knife spreading formula descaler for steel billet | |
CN202921661U (en) | Aluminum plate strip cold rolling mill purpose flattening roller | |
CN201070637Y (en) | Roll change lifting device of rough rolling edger mill | |
CN205270335U (en) | Special steel continuous casting and rolling equipment | |
CN209698000U (en) | A kind of slighter compress fan-shaped section for the artificial bulge of slab | |
CN205147263U (en) | Close-packed double-roller continuous withdrawal and straightening device and withdrawal and straightening equipment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20170118 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20180322 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B22D 11/12 20060101AFI20180316BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20190313 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20190919 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1226601 Country of ref document: AT Kind code of ref document: T Effective date: 20200215 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602014060519 Country of ref document: DE |
|
GRAT | Correction requested after decision to grant or after decision to maintain patent in amended form |
Free format text: ORIGINAL CODE: EPIDOSNCDEC |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PK Free format text: BERICHTIGUNG B8 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 602014060519 Country of ref document: DE Owner name: UNIVERSITY OF SCIENCE & TECHNOLOGIE BEIJING, CN Free format text: FORMER OWNER: UNIVERSTIY OF SCIENCE & TECHNOLOGY BEIJING, BEIJING, CN |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20200122 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200422 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200614 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200522 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200423 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200422 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602014060519 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20201023 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200925 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20200930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200925 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200925 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200925 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200122 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: UEP Ref document number: 1226601 Country of ref document: AT Kind code of ref document: T Effective date: 20200122 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20230911 Year of fee payment: 10 Ref country code: AT Payment date: 20230821 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230911 Year of fee payment: 10 |