EP3691805A1 - Walzen eines walzguts - Google Patents
Walzen eines walzgutsInfo
- Publication number
- EP3691805A1 EP3691805A1 EP18739882.1A EP18739882A EP3691805A1 EP 3691805 A1 EP3691805 A1 EP 3691805A1 EP 18739882 A EP18739882 A EP 18739882A EP 3691805 A1 EP3691805 A1 EP 3691805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- stand
- roll
- rolling stand
- stock
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 263
- 239000000463 material Substances 0.000 title claims abstract description 15
- 239000002826 coolant Substances 0.000 claims abstract description 41
- 239000000314 lubricant Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000012159 carrier gas Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 35
- 230000001050 lubricating effect Effects 0.000 claims description 34
- 239000000839 emulsion Substances 0.000 claims description 33
- 238000001816 cooling Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 18
- 239000010731 rolling oil Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005496 tempering Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000004544 sputter deposition Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000002960 lipid emulsion Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
Definitions
- the invention relates to a rolling apparatus for rolling a rolling stock and a method for operating the rolling apparatus.
- Rolling mill is usually in one or the rolling mill
- Rolling device arranged, which has two rolling stands and can be operated in two different operating modes.
- a first mode of operation the thickness of the rolling stock in the first rolling stand of the rolling device is worth mentioning
- Produced surface roughness of the rolling stock wherein the thickness of the rolling stock is reduced only slightly, for example, less than three percent of the thickness of the incoming rolling mill in the second rolling mill.
- the first mode of operation is typically used in the production of relatively hard and thin sheet metal, for example, in the production of tinplate with a thickness of less than 0.5 mm, which is used as a can plate for food.
- the rolling stock in the rolling train is first rolled to a thickness which is approximately in the range of a desired final thickness of the rolling stock. Since this usually a correspondingly large number of rolling steps or a correspondingly large stitch loss is required, the rolling stock after these rolling steps or
- Operating mode is used, for example, when rolling a rolling stock, which is subsequently galvanized and is usually slightly thicker than the aforementioned tinplate.
- the first operating mode requires sufficient lubrication of the rolling stock as it passes through the first rolling stand and cooling of the rolling stock and work rolls of the first rolling stand after passing the first rolling stand.
- a lubricating emulsion is applied to the rolling stock before it passes through the first rolling mill, which has a relatively high proportion of lubricant of 5% to 30%.
- the emulsion used is usually an emulsion containing water and a rolling oil as a lubricant.
- For cooling the rolling stock is after passing through the first stand usually a
- Cooling emulsion applied to the work rolls of the first rolling stand and / or the rolling stock which usually has water and a rolling oil with a relatively low rolling oil content.
- DE 10 2009 054 205 A1 discloses a method for cooling and cleaning in casting plants, rolling mills or other strip processing plants, wherein cast products, rolling or
- Components of the systems are simultaneously cooled and cleaned by a gas-liquid mixture and possibly lubricated and sealed.
- WO 2012/079785 Al discloses a method and a method
- Sputtering generated and applied by means of an array of spray nozzles on at least one work roll and / or the rolling stock.
- the invention is based on the object
- the object is achieved by a rolling device with the features of claim 1 and by a method having the features of claim 12.
- Walzguts includes a first rolling mill, a spaced apart from the first rolling mill second rolling mill, a
- Each rolling stand has two work rolls spaced apart from one another by a nip through which the rolling stock can be guided.
- a lubricating mixture applying device is for applying a lubricating mixture of a carrier gas and a lubricant on a side facing away from the second rolling mill side
- Roll stand formed, wherein the lubricant is a first rolling oil.
- Suitable rolling oils for lubricating a nip are known and commercially available.
- Coolant applicator is for applying
- Coolant such as cooling water or a Cooling emulsion, formed on a side facing the second roll stand side of at least one work roll of the first rolling stand and / or on at least one Walzgutober Structure of the rolling on a second rolling stand facing side of the first rolling stand.
- Dressing agent applicator is for applying a tempering agent to one of the second rolling stand
- the pulper is an emulsion containing a second rolling oil and water.
- Suitable such tempering agents are known and commercially available.
- Lubricating mixture of a carrier gas and a lubricant on the work rolls of the rolling mill and / or the rolling stock are applied to the friction between the rolling stock and the work rolls of the first stand in the above
- the use of a lubricating mixture of a carrier gas and a lubricant has several advantages. On the one hand, this can make the
- Lubricant consumption can be reduced, since for the production of the lubricant mixture, which is sprayed directly onto the work rolls and / or the rolling stock, less lubricant than for the production of a lubricating emulsion is required. On the other hand eliminates the costly production and
- Thedeschetzbringvorraum allows cooling of the work rolls of the first rolling mill and the rolling through a coolant.
- the use of cooling water as a coolant has several advantages over the use of a
- Cooling emulsion In principle, a cooling emulsion can only be used above a certain minimum temperature
- Cooling water can be used at lower temperatures
- Cooling emulsion which is usually used for cooling.
- the skin-applying device allows the
- Carrier gas is air. Air is particularly advantageous as a carrier gas, since it is inexpensive and environmentally friendly.
- Sputtering device which are supplied to the carrier gas and the lubricant and for generating the
- Lubricating mixture of the carrier gas and the lubricant is formed. This allows the generation of the
- a further embodiment of the invention provides that the rolling stands for each work roll have at least one support roller and the rolling device a
- Cleaning fluid has on at least one support roller.
- cleaning fluid for example, water or a
- a cleaning fluid applying apparatus has a plurality of cleaning nozzles for discharging the cleaning fluid.
- the cleaning fluid application device enables cleaning of the back-up rollers from abrasion that builds up
- Roll surfaces of the backup rolls collects. This cleaning is advantageous because abrasion particles are formed during the skin pass through the roughening of the rolling stock surface, which would increasingly contaminate the rolling stock without the cleaning.
- the rolling apparatus is also
- Coolant applicator is connected and for each stand a catcher for collecting coolant, which drips from the rolling stand, and a
- Roll stand facing away from at least one work roll of the first stand or / and at least one
- the coolant is on a second roll stand side facing at least one work roll of the first stand or / and at least one
- An embodiment of the method provides that, in the first operating mode, the skin-piercing agent acts on a side of at least one work roll of the second rolling stand and / or on at least one side facing the first rolling stand
- 1 shows schematically a rolling device according to the prior art
- 2 shows schematically a rolling device according to the invention.
- FIG. 1 schematically shows a rolling device 1 for rolling a rolling stock 3 according to the prior art.
- Rolling device 1 has two rolling stands 5, 7, which are arranged one behind the other in a rolling direction 9.
- Each roll stand 5, 7 has two work rolls 11 and for each work roll 11, a support roller 13. The two
- Work rolls 11 of a roll stand 5, 7 are spaced from each other by a nip 15, through which the rolling stock 3 is guided.
- the support roller 13 of a work roll 11 is on a side facing away from the nip 15 side of
- Work roll 11 is arranged.
- the rolling apparatus 1 further has a
- the rolling apparatus 1 is operated in two different operating modes.
- a first mode of operation the thickness of the rolling stock 3 in a first stand 5, which in the
- Rolling 9 is arranged in front of the second rolling mill 7 and is thus traversed by the rolling stock 3 in front of the second rolling mill 7, significantly reduced, for example by more than three percent to the thickness of the rolled material 3 in front of the first roll stand 5.
- the rolling stock 3 In the second roll stand 7 the rolling stock 3, however, primarily trained, that is, a desired surface roughness of the rolled material 3 is produced, the thickness of the rolled material 3 is only slightly reduced, for example, less than three percent compared to the thickness of the rolled material 3 before the second rolling stand 7 the second mode of operation, the rolling stock 3 in both Rolling mills 5, 7 on the other hand trained without significant reduction in thickness.
- Lubricating emulsion is by means of lubrication 23 of the
- Lubricating emulsion contains water and a rolling oil and has a relatively high rolling oil content of crizoswe.LSG 5% to 30 on.
- a skin-pass agent is applied to the work rolls 11 of the second roll stand 7 or / and in the region of the roll gap 15 of the second roll stand 7 to the rolling stock 3 in both operating modes.
- the tempering agent is by means of tempering 31 of the
- Roll stand 5 facing sides of the work rolls 11 of the second rolling stand 7 and / or on the upper side
- the skin-pass agent is a skin-fat emulsion, which contains water and a rolling oil, wherein the tempering emulsion has a lower rolling oil content and a different rolling oil than the lubricating emulsion. Furthermore, with the skin-applying device 21 in the second operating mode, the skin-pass agent is also applied to the work rolls 11 of the first roll stand 7 and / or in the region of the roll gap 15 of the first roll stand 7 onto the rolling stock 3.
- the tempering agent is by means of another
- the rolling apparatus 1 also has a
- Cleaning fluid applying device 33 for applying a cleaning fluid on support rollers 13 of the rolling stands 5, 7 in order to clean the back-up rollers 13 of abrasion, which collects on the roll surfaces of the support rollers 13.
- Cleaning fluid is the cleaning nozzles 35 of the
- FIG. 2 shows only cleaning nozzles 35 for the support rollers 13 arranged above the work rolls 11.
- the madesfluidaufbringvoriques 33 may additionally additional cleaning nozzles 35 for the
- the cleaning fluid used is, for example, water or a cleaning emulsion.
- FIG. 2 shows a rolling device 1 according to the invention.
- This rolling device 1 differs from the rolling device 1 shown in FIG. 1 in that instead of the lubricating emulsion application device 17, it has a rolling device 1
- Lubricating mixture applicator 37 has. Further, the rolling device 1 has a coolant applying device 39 on, from which a coolant can be dispensed, either
- Cooling water or a cooling emulsion is.
- the rolling apparatus 1 shown in FIG. 2 is also operated in two different operating modes.
- a first operating mode in turn, the thickness of the rolling stock 3 is appreciably reduced in the first rolling stand 5, for example by more than three percent compared to the thickness of the rolling stock 3 in front of the first rolling stand 5, and in the second rolling stand 7 the rolling stock 3 is primarily dressed, the thickness of the
- Walzguts 3 is only slightly reduced, for example, less than three percent to the thickness of the rolling stock 3 before the second rolling stand 7.
- Rolling device 1 in turn trained without significant reduction in thickness.
- the lubricating mixture is a mixture of a carrier gas and a lubricant.
- a carrier gas is
- Lubricant applicator 37 has for each
- Lubricant be supplied via a lubricant line 45 and which is formed for generating the lubricant mixture of the carrier gas and the lubricant. Further, the lubricating mixture applying device 37 has a plurality
- Spray nozzles 47 each of which a
- Atomizing device 41 produced lubricating mixture can be fed.
- the of a sputtering device 41 with the Lubricating mixture fed spray nozzles 47 are distributed over a width of the rolling stock 3 and spray the rolling stock 3 along its width evenly with the lubricating mixture on the respective Walzgutober Design 25, 27th
- coolant (cooling water or a cooling emulsion) is applied to the work rolls 11 of the first rolling stand 5 or / and to the rolling stock 3
- the coolant is directed by means of coolant nozzles 49 of the coolant application device 39 onto the sides of the work rolls 11 of the first rolling stand 5 or / and on the upper side facing the second rolling stand 7
- the rolling device 1 has a
- Cleaning fluid application device 33 which are formed and used as in the rolling device 1 shown in Figure 1 and therefore will not be described again here.
- the rolling apparatus 1 further has a
- Coolant circuit 51 to which the
- Coolant applicator 39 is connected.
- the coolant circuit 51 has for each rolling stand 5, 7 a collecting device 53 for collecting coolant, which drips from the roll stand 5, 7, and a
- Coolant processing device 55 for cleaning the caught in the collecting devices 53 coolant.
- Coolant treatment device 55 for example, a rolling oil of the lubricating mixture and / or other substances, such as substances, from the rolling stock 3, the Work rolls 11 and / or the backing rollers 13 were rubbed away from the coolant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17194457.2A EP3461566A1 (de) | 2017-10-02 | 2017-10-02 | Walzen eines walzguts |
PCT/EP2018/069635 WO2019068382A1 (de) | 2017-10-02 | 2018-07-19 | Walzen eines walzguts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3691805A1 true EP3691805A1 (de) | 2020-08-12 |
EP3691805B1 EP3691805B1 (de) | 2021-10-20 |
Family
ID=60009528
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17194457.2A Withdrawn EP3461566A1 (de) | 2017-10-02 | 2017-10-02 | Walzen eines walzguts |
EP18739882.1A Active EP3691805B1 (de) | 2017-10-02 | 2018-07-19 | Walzen eines walzguts |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17194457.2A Withdrawn EP3461566A1 (de) | 2017-10-02 | 2017-10-02 | Walzen eines walzguts |
Country Status (7)
Country | Link |
---|---|
US (1) | US20200269296A1 (de) |
EP (2) | EP3461566A1 (de) |
JP (1) | JP2020535970A (de) |
CN (1) | CN111148582B (de) |
MX (1) | MX2020003166A (de) |
RU (1) | RU2767127C2 (de) |
WO (1) | WO2019068382A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3733317B1 (de) | 2019-04-30 | 2022-10-05 | Primetals Technologies Austria GmbH | Walzen eines walzguts |
EP3791971A1 (de) * | 2019-09-10 | 2021-03-17 | Primetals Technologies Austria GmbH | Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3835460A1 (de) * | 1988-10-18 | 1990-04-19 | Schloemann Siemag Ag | Verfahren und vorrichtung zur kuehlung und schmierung spanlos umgeformter metalle, insbesondere zur kuehlung und schmierung von walzen und walzgut beim kaltwalzen in einem walzgeruest |
US5524465A (en) * | 1991-03-29 | 1996-06-11 | Hitachi, Ltd. | Work rolls crossing type mill, rolling system and rolling method |
DE10143407A1 (de) * | 2001-09-05 | 2003-03-20 | Sms Demag Ag | Kombinierte Verwendung von Öl und Emulsionen beim Kaltwalzen von Bändern |
DE102004040375A1 (de) * | 2004-06-09 | 2005-12-29 | Sms Demag Ag | Verfahren und Walzgerüst zum Kaltwalzen von metallischem Walzgut, insbesondere von Walzband, mit Düsen für gasförmige oder flüssige Behandlungsmedien |
JP4102356B2 (ja) * | 2004-11-10 | 2008-06-18 | 新日本製鐵株式会社 | 冷間圧延設備および冷間圧延方法 |
RU2278755C1 (ru) * | 2004-11-10 | 2006-06-27 | Открытое акционерное общество "Новолипецкий металлургический комбинат" (ОАО "НЛМК") | Устройство для подачи смазочно-охлаждающей жидкости (сож) при дрессировке |
DE102009054205A1 (de) * | 2009-11-21 | 2011-05-26 | Sms Siemag Aktiengesellschaft | Kühlung und Reinigung in Bandprozesslinien |
EP2554283B1 (de) * | 2010-03-31 | 2016-05-11 | Nippon Steel & Sumitomo Metal Corporation | Verfahren und vorrichtung zur herstellung eines heissgewalzten stahlblechs |
JP2012055955A (ja) * | 2010-09-13 | 2012-03-22 | Nippon Steel Corp | 冷間圧延における圧延潤滑方法およびその装置 |
EP2465619A1 (de) | 2010-12-16 | 2012-06-20 | Siemens VAI Metals Technologies GmbH | Verfahren und Vorrichtung zum Aufbringen eines Schmiermittels beim Walzen eines metallischen Walzgutes |
JP5803842B2 (ja) * | 2012-08-16 | 2015-11-04 | 新日鐵住金株式会社 | 圧延設備及び圧延方法 |
-
2017
- 2017-10-02 EP EP17194457.2A patent/EP3461566A1/de not_active Withdrawn
-
2018
- 2018-07-19 CN CN201880064628.4A patent/CN111148582B/zh active Active
- 2018-07-19 RU RU2020113071A patent/RU2767127C2/ru active
- 2018-07-19 MX MX2020003166A patent/MX2020003166A/es unknown
- 2018-07-19 JP JP2020518753A patent/JP2020535970A/ja active Pending
- 2018-07-19 US US16/649,872 patent/US20200269296A1/en not_active Abandoned
- 2018-07-19 WO PCT/EP2018/069635 patent/WO2019068382A1/de unknown
- 2018-07-19 EP EP18739882.1A patent/EP3691805B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
RU2020113071A (ru) | 2021-11-08 |
EP3691805B1 (de) | 2021-10-20 |
JP2020535970A (ja) | 2020-12-10 |
WO2019068382A1 (de) | 2019-04-11 |
CN111148582B (zh) | 2022-05-10 |
RU2020113071A3 (de) | 2021-11-30 |
CN111148582A (zh) | 2020-05-12 |
US20200269296A1 (en) | 2020-08-27 |
EP3461566A1 (de) | 2019-04-03 |
RU2767127C2 (ru) | 2022-03-16 |
MX2020003166A (es) | 2020-07-29 |
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