CN114641372A - Three-layer grinding wheel - Google Patents

Three-layer grinding wheel Download PDF

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Publication number
CN114641372A
CN114641372A CN202080072484.4A CN202080072484A CN114641372A CN 114641372 A CN114641372 A CN 114641372A CN 202080072484 A CN202080072484 A CN 202080072484A CN 114641372 A CN114641372 A CN 114641372A
Authority
CN
China
Prior art keywords
grinding wheel
inner layer
diamond
abrasive grains
outer layers
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.)
Pending
Application number
CN202080072484.4A
Other languages
Chinese (zh)
Inventor
I·维格纳
P·雷里奇
K·科尔谢尔特
M·韦伯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlantic GmbH
Original Assignee
Atlantic GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Atlantic GmbH filed Critical Atlantic GmbH
Publication of CN114641372A publication Critical patent/CN114641372A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
    • B24B11/02—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls
    • B24B11/04—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels
    • B24B11/06—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels acting by the front faces, e.g. of plane, grooved or bevelled shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D99/00—Subject matter not provided for in other groups of this subclass
    • B24D99/005—Segments of abrasive wheels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention relates to a multilayer round grinding wheel 1, which comprises at least three substantially flat layers 2, 3 and 4, an inner layer 2 and two outer layers 3 and 4 adjacent to the inner layer, wherein at least the inner layer has diamond-ratio abrasive grains, and the diamond ratio of the abrasive grains in the inner layer is larger than that of the abrasive grains in the outer layers.

Description

Three-layer grinding wheel
Technical Field
The present invention relates to a grinding wheel having the features of the preamble of claim 1 and to the use of the grinding wheel.
Background
In general, grinding wheels consisting of a single uniform layer of abrasive material are known. For example, document WO 2006/079444 a1 discloses a grinding wheel having a uniform layer containing diamond abrasive particles in a synthetic resin binder for grinding ceramic balls. The grinding wheel is subjected to a force in the axial direction and the ball to be ground moves in a groove concentric with the axis of rotation.
Multilayer grinding wheels are also known, for example from document JP 2003300166 a. Therein, a grinding wheel is described having three layers stacked on top of each other in an axial direction in a sandwich-like manner. The grinding wheel is part of a grinding device for making precise cuts in the radial direction. To obtain better dimensional accuracy, the intermediate layer is made of relatively coarse diamond grains, while the two axially adjacent outer layers are made of diamond grains of finer grain size. In use, wear of the two outer layers results in the grinding peripheral surface of the grinding wheel being convex so that the grinding wheel is centered in the workpiece. Furthermore, document CN106944938 discloses a three-layer grinding wheel in which two outer layers contain a certain proportion of diamond abrasive particles, and an intermediate or inner layer contains alumina or synthetic resin. This configuration improves heat dissipation through the inner layer of the grinding wheel.
Grinding wheels having a matrix with uniform or equal amounts of diamond abrasive grains in all layers are expensive to manufacture. A three-layer wheel with no diamond grit in the middle or inner layer is not suitable for grinding ceramic balls.
Disclosure of Invention
The object of the invention is to create a grinding wheel with at least three layers, which is less expensive to manufacture than the prior art and which is particularly suitable for grinding ceramic balls.
This object is achieved by a grinding wheel having the features of claim 1 and the use of the grinding wheel.
Since the grinding wheel is provided with an inner layer or intermediate layer and at least two outer layers, and the diamond content of the abrasive grains of the inner layer is higher than that of the two outer layers directly adjacent to the inner layer, diamond abrasive grains can be saved as compared with a grinding wheel of a uniform structure or a grinding wheel such as one in which each layer differs only in abrasive grain size without a difference in diamond content. Furthermore, such a grinding wheel can be advantageously used for grinding ceramic balls, since the outer layer in contact with the ball quickly forms the necessary guide grooves and the inner layer must perform the grinding function mainly or completely, i.e. to achieve the actual grinding process.
Advantageously, at least the inner layer is designed with abrasive particles in a synthetic resin binder. It is furthermore advantageous if, on the respective end face of the inner layer, two outer layers directly adjacent to the inner layer have the same abrasive grains, in particular if these two outer layers have the same thickness in the axial direction.
When used for ball grinding, one outer planar side of the new grinding wheel is preferably bonded to a metal backing plate. The outer layer directly on the bottom plate is not used for grinding or guiding purposes during ball milling. However, it has turned out to be advantageous to provide this layer opposite another outer layer of the same design, since this will minimize the deformation of the whole grinding wheel, in particular of the inner layer during production.
Drawings
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It shows that:
FIG. 1: radial cross-section of a three-layer grinding wheel;
FIG. 2: the grinding wheel of fig. 1 with guide grooves prepared for ball milling; and
FIG. 3: the grinding wheel of fig. 1 and 2 was used for ball milling in a corresponding apparatus.
Detailed Description
In fig. 1, a grinding wheel 1 according to the invention is schematically shown in a broken-away cross-section. The grinding wheel 1 has an inner layer 2, the inner layer 2 being sandwiched between a first outer layer 3 and a second outer layer 4. The inner layer 2 has a higher diamond fraction in the abrasive grain than the two outer layers 3 and 4. For example, the inner layer 2 may have a diamond content of 50% by weight (wt%), 75% by weight, or even 90% by weight in the abrasive particles. In this specification, the proportion of abrasive particles that do not contain a binder matrix is meant. In a preferred embodiment, the abrasive particles may also consist of 100% diamond. The particle size of the abrasive particles is not very important for the present invention, suitable particle sizes are known from the prior art.
The two outer layers 3, 4 have substantially the same structure. They also contain abrasive particles, but the content of diamond is relatively low or no diamond. Thus, the diamond content of the two layers may be less than 50% by weight, in particular less than 25% or even less than 10%. In a preferred embodiment, the two outer layers 3, 4 are substantially free of diamond grit, except for impurities or inclusions unavoidable during the manufacturing process.
If the inner layer 2 is not made with 100% diamond grit, the total 100% required can be supplemented with cheaper grit, such as corundum (Al)2O3) In particular high grade corundum, silicon carbide (SiC), but any other known abrasive grain may be used. The two outer layers may also contain conventional abrasive particles. In particular, in embodiments where the two outer layers 3, 4 may be free of diamond grit, all of the grit is selected from a lower cost material such as corundum, SiC, other grit, or a mixture of acceptable non-diamond grits.
The inner layer 2 and the outer layers 3, 4 are manufactured by hot pressing in a synthetic resin binder. The ratio between the abrasive grains and the synthetic resin can be appropriately selected with reference to the conventional ratio in the prior art. The pore volume of the grinding wheel according to the invention is preferably between 3% and 10%.
The substantially identical structure of the two outer layers 3, 4 ensures that the grinding wheel is practically free from deformations during or after manufacture, for example in the cooling phase. For grinding wheels with an outer layer on only one side, warping is expected due to differential thermal conduction, thermal capacity, and differential thermal expansion of the materials.
The grinding wheel is a round grinding wheel which is rotationally symmetric about axis D.
The thickness along axis D may be selected according to the application. The dimensions of the grinding wheel and of the layers 2, 3 and 4 are therefore selectable and depend on the application. The diameter of the grinding wheel can also be selected and adjusted according to the requirements of the grinding device. In particular, the thickness of the outer layers 3, 4 may be less than the thickness of the inner layer 2, since they are mainly used to stabilize the grinding wheel. The outer layer 3, which is the feed layer for the ceramic balls, is ground after hot pressing to a size suitable for the application, i.e. to the diameter of the balls to be ground in use.
Fig. 2 shows the grinding wheel 1 of fig. 1 in the same cut-out, broken-away representation. As can be seen from the sectional view, the upper outer layer 3 is then (after hot pressing) provided with guide grooves 5, compared to the initial situation of fig. 1, the guide grooves 5 providing for the grinding wheel 1 to be used in a ball mill. The guide grooves 5 are concentric circumferential grooves provided on the outer surface of the outer layer 3 and arranged symmetrically and concentrically with respect to the rotation axis D.
Fig. 3 shows the use of the grinding wheel 1 according to the invention for ball milling on a device with a vertical drive shaft. Fig. 3 shows a schematic side view of an apparatus for ball milling. Here, a stationary guide disc 1 is provided, preferably made of cast steel. The guide disc 10 is provided on its bottom surface with a circumferential guide groove 11, and a plurality of balls 12 to be ground are guided in the guide groove 11. The bottom plate 13 is provided with a grinding wheel 1 thereon, seen from below, the grinding wheel 1 having an inner layer 2 and two outer layers 3, 4, the bottom plate 12 being rotated by a drive shaft 15.
For grinding, a pressure P is applied from the upper side to the stationary guide disc 10. The bottom plate 13 is rotated by the drive means, causing the balls 12 to roll in the guide grooves 11, in particular also in the guide grooves 5 of the grinding wheel 1. Although the guide grooves in the first outer layer 3 have not yet made any significant contribution to the erosion of the ceramic balls, an efficient grinding process begins when the balls 12 pass through the layer 3 and come into contact with the diamond containing layer 2. The difference in velocity in different regions of the guide grooves causes the abrasive particles to move relative to the surface of the ceramic ball. The abrasive particles then cause wear of the surface of the sphere, thereby improving the surface quality and shape of the sphere.
The grinding wheel according to the invention can be used in ball milling apparatuses having a vertical drive shaft as well as in ball milling apparatuses having a horizontal drive shaft.
The advantage of the grinding wheel described in this connection is that, especially when used for ball grinding, the entire thickness of the inner layer 2 can be used for the grinding process. The outer layer of cheaper abrasive particles is used only for the initial guidance of the ball blank in the guide groove 5 and for fixing the grinding wheel to the bottom plate 13. The support layer 4 has the further effect that the layer 3 containing diamond abrasive particles can be used until full wear and that the diamond material to be discarded can be reduced compared to a single layer disc. If both tasks are performed by the diamond layer in the case of a single layer diamond abrasive wheel, the total consumption of diamond abrasive particles is higher than in the case of the aforementioned multilayer abrasive wheel having an inner layer containing a higher proportion of diamond. Furthermore, the softer running-in layer 2 leads to the fact that the formation of the grooves is significantly faster than in the case of a hard diamond layer on the one hand, and the number of low-quality ball batches is reduced on the other hand.

Claims (12)

1. A multilayer round grinding wheel (1) having at least three substantially flat layers, comprising an inner layer (2) and two outer layers (3, 4) immediately adjacent to the inner layer (2), wherein at least the inner layer (2) has a diamond fraction of abrasive grains, characterized in that the diamond fraction of the abrasive grains in the inner layer (1) is larger than the diamond fraction of the abrasive grains in the outer layers (3, 4).
2. The grinding wheel according to claim 1, characterized in that said inner layer (2) has a diamond fraction of at least 50% by weight in abrasive grains.
3. The grinding wheel according to claim 1, characterized in that said inner layer (2) has a diamond content of at least 75% by weight in abrasive grains.
4. The grinding wheel according to claim 1, characterized in that said inner layer (2) has a diamond fraction of at least 90% by weight in abrasive grains.
5. The grinding wheel according to any of the preceding claims 1 or 4, characterized in that the outer layers (3, 4) each have a diamond fraction of less than 90% by weight in the abrasive grains.
6. The grinding wheel according to any of the preceding claims 1, 3 or 4, characterized in that the outer layers (3, 4) each have a diamond content of less than 75% by weight in the abrasive grains.
7. The grinding wheel according to any of the preceding claims, characterized in that said outer layers (3, 4) each have a diamond fraction of less than 50% by weight in the abrasive grains.
8. The grinding wheel according to any of the preceding claims, characterized in that the grinding wheel (1) has exactly three layers (2, 3, 4) containing abrasive grains.
9. The grinding wheel according to any of the preceding claims, characterized in that the outer layers (3, 4) have the same structure and, in particular, the outer layers (3, 4) have the same axial thickness.
10. The grinding wheel according to any of the preceding claims, characterized in that said inner layer (2) and said outer layers (3, 4) are made of a synthetic resin binder.
11. Use of the grinding wheel (1) of any of the preceding claims for grinding balls (12).
12. Use according to claim 11, characterized in that the outer side of the grinding wheel (1) is bonded with a metal support plate (13).
CN202080072484.4A 2019-08-23 2020-08-21 Three-layer grinding wheel Pending CN114641372A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019122711.9 2019-08-23
DE102019122711.9A DE102019122711A1 (en) 2019-08-23 2019-08-23 Three-layer grinding wheel
PCT/EP2020/073533 WO2021037745A1 (en) 2019-08-23 2020-08-21 Three-layer abrasive disk

Publications (1)

Publication Number Publication Date
CN114641372A true CN114641372A (en) 2022-06-17

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Application Number Title Priority Date Filing Date
CN202080072484.4A Pending CN114641372A (en) 2019-08-23 2020-08-21 Three-layer grinding wheel

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US (1) US20220176517A1 (en)
EP (1) EP4017681A1 (en)
JP (2) JP2022545807A (en)
KR (1) KR20220078574A (en)
CN (1) CN114641372A (en)
BR (1) BR112022003308A2 (en)
DE (1) DE102019122711A1 (en)
MX (1) MX2022002287A (en)
WO (1) WO2021037745A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108594A1 (en) 2021-04-07 2022-10-13 Schaeffler Technologies AG & Co. KG Grinding wheel and method for grinding ceramic balls and device with such a grinding wheel

Citations (16)

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Publication number Priority date Publication date Assignee Title
GB650452A (en) * 1945-10-20 1951-02-28 Norton Grinding Wheel Co Ltd Improvements in diamond abrasive wheels and other abrasive articles
US4131436A (en) * 1977-09-12 1978-12-26 Wiand Ronald C Ophthalmic flat roughing wheel
JPS6311283A (en) * 1986-07-01 1988-01-18 Daido Sangyo Kk Diamond wheel and formation thereof
JPH03161274A (en) * 1989-11-16 1991-07-11 Mitsui Petrochem Ind Ltd Grinding material, manufacture thereof and grinding roll
US6286498B1 (en) * 1997-04-04 2001-09-11 Chien-Min Sung Metal bond diamond tools that contain uniform or patterned distribution of diamond grits and method of manufacture thereof
JP2003300166A (en) * 2002-04-09 2003-10-21 Read Co Ltd Multi-layer structure blade and method for manufacture thereof
US20080171492A1 (en) * 2005-01-27 2008-07-17 Michael Potzsch Method And Device For Grinding Ceramic Spheres
JP2010234597A (en) * 2009-03-31 2010-10-21 Mitsubishi Materials Corp Cutting blade, method for manufacturing cutting blade, and cutting apparatus
CN102170999A (en) * 2008-10-03 2011-08-31 Ntn株式会社 Apparatus for polishing spherical body, method for polishing spherical body and method for manufacturing spherical member
JP2012152882A (en) * 2011-01-28 2012-08-16 Mitsui Kensaku Toishi Kk Vitrified multilayer grinding wheel
CN102814746A (en) * 2012-07-09 2012-12-12 南京航空航天大学 Grinding material optimizing and distributing sintered diamond tool and manufacture method thereof
JP2015199138A (en) * 2014-04-04 2015-11-12 Ntn株式会社 Grindstone, polishing device, polishing method and method for producing ceramic member
CN105829022A (en) * 2013-12-20 2016-08-03 3M创新有限公司 Polishing cushion, polishing apparatus, polishing method, and article including object polished by the polishing method
CN106944938A (en) * 2017-05-11 2017-07-14 芜湖市华峰砂轮有限公司 A kind of resin wheel
JP2017148874A (en) * 2016-02-22 2017-08-31 株式会社ディスコ Grindstone, grinding wheel and grinding method
CN107848095A (en) * 2015-07-09 2018-03-27 德国Lukas-Erzett磨料磨具有限公司 Abrasive disk

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US2398408A (en) * 1943-08-25 1946-04-16 Carborundum Co Abrasive article
ZA713105B (en) * 1971-05-12 1972-09-27 De Beers Ind Diamond Diamond and the like grinding wheels
JPS6288577A (en) * 1985-10-14 1987-04-23 Mitsubishi Metal Corp Manufacture of resinoid grinding wheel having plurality of grain layer
JP3347612B2 (en) * 1996-11-22 2002-11-20 株式会社ノリタケスーパーアブレーシブ Super abrasive whetstone
JP2004338028A (en) * 2003-05-15 2004-12-02 Nikon Corp Grinding wheel for grinding, and grinding device equipped with the grinding wheel
JP6446313B2 (en) * 2015-04-02 2018-12-26 株式会社ミズホ Sintered vitrified superfinishing wheel

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Publication number Priority date Publication date Assignee Title
GB650452A (en) * 1945-10-20 1951-02-28 Norton Grinding Wheel Co Ltd Improvements in diamond abrasive wheels and other abrasive articles
US4131436A (en) * 1977-09-12 1978-12-26 Wiand Ronald C Ophthalmic flat roughing wheel
JPS6311283A (en) * 1986-07-01 1988-01-18 Daido Sangyo Kk Diamond wheel and formation thereof
JPH03161274A (en) * 1989-11-16 1991-07-11 Mitsui Petrochem Ind Ltd Grinding material, manufacture thereof and grinding roll
US6286498B1 (en) * 1997-04-04 2001-09-11 Chien-Min Sung Metal bond diamond tools that contain uniform or patterned distribution of diamond grits and method of manufacture thereof
JP2003300166A (en) * 2002-04-09 2003-10-21 Read Co Ltd Multi-layer structure blade and method for manufacture thereof
US20080171492A1 (en) * 2005-01-27 2008-07-17 Michael Potzsch Method And Device For Grinding Ceramic Spheres
CN102170999A (en) * 2008-10-03 2011-08-31 Ntn株式会社 Apparatus for polishing spherical body, method for polishing spherical body and method for manufacturing spherical member
JP2010234597A (en) * 2009-03-31 2010-10-21 Mitsubishi Materials Corp Cutting blade, method for manufacturing cutting blade, and cutting apparatus
JP2012152882A (en) * 2011-01-28 2012-08-16 Mitsui Kensaku Toishi Kk Vitrified multilayer grinding wheel
CN102814746A (en) * 2012-07-09 2012-12-12 南京航空航天大学 Grinding material optimizing and distributing sintered diamond tool and manufacture method thereof
CN105829022A (en) * 2013-12-20 2016-08-03 3M创新有限公司 Polishing cushion, polishing apparatus, polishing method, and article including object polished by the polishing method
JP2015199138A (en) * 2014-04-04 2015-11-12 Ntn株式会社 Grindstone, polishing device, polishing method and method for producing ceramic member
CN107848095A (en) * 2015-07-09 2018-03-27 德国Lukas-Erzett磨料磨具有限公司 Abrasive disk
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JP2017148874A (en) * 2016-02-22 2017-08-31 株式会社ディスコ Grindstone, grinding wheel and grinding method
CN106944938A (en) * 2017-05-11 2017-07-14 芜湖市华峰砂轮有限公司 A kind of resin wheel

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Publication number Publication date
JP2022545807A (en) 2022-10-31
DE102019122711A1 (en) 2021-02-25
WO2021037745A1 (en) 2021-03-04
KR20220078574A (en) 2022-06-10
BR112022003308A2 (en) 2022-05-24
US20220176517A1 (en) 2022-06-09
JP2024024111A (en) 2024-02-21
MX2022002287A (en) 2022-08-25
EP4017681A1 (en) 2022-06-29

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