EP3804907A1 - Procédé de fabrication d'une unité abrasive - Google Patents

Procédé de fabrication d'une unité abrasive Download PDF

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Publication number
EP3804907A1
EP3804907A1 EP20200767.0A EP20200767A EP3804907A1 EP 3804907 A1 EP3804907 A1 EP 3804907A1 EP 20200767 A EP20200767 A EP 20200767A EP 3804907 A1 EP3804907 A1 EP 3804907A1
Authority
EP
European Patent Office
Prior art keywords
abrasive
recesses
carrier
material carrier
designed
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
Application number
EP20200767.0A
Other languages
German (de)
English (en)
Other versions
EP3804907C0 (fr
EP3804907B1 (fr
Inventor
Robert Füllmann
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.)
Schmitz Metallographie GmbH
Original Assignee
Schmitz Metallographie 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 Schmitz Metallographie GmbH filed Critical Schmitz Metallographie GmbH
Publication of EP3804907A1 publication Critical patent/EP3804907A1/fr
Application granted granted Critical
Publication of EP3804907C0 publication Critical patent/EP3804907C0/fr
Publication of EP3804907B1 publication Critical patent/EP3804907B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/04—Zonally-graded surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing

Definitions

  • the invention relates to a method for producing an abrasive unit for grinding, polishing and / or lapping, an abrasive unit for grinding, polishing and / or lapping, and a processing machine for grinding, polishing and / or lapping.
  • Abrasive units are known in principle and can be provided, for example, as grinding, polishing or lapping disks.
  • Grinding wheels usually comprise a hard grinding material for removing material from a workpiece. This hard abrasive material is usually coupled with a binder that holds the hard abrasive material in one position. Polishing and lapping disks are usually designed accordingly.
  • a screen printing process is usually used to manufacture grinding, polishing or lapping disks.
  • three-dimensional screen printing processes are also used to produce such grinding and polishing disks.
  • a screen printing stencil is placed on a carrier plate, for example, and a mixture of the grinding material and the binding material is inserted into openings in the screen printing stencil. The screen printing stencil is then removed again.
  • This method can also be carried out by placing the screen printing stencil on a polishing cloth which is arranged on a carrier plate.
  • the object is achieved by a method for producing an abrasive unit for grinding, polishing and / or lapping, comprising the steps of: making a plurality of recesses in a material carrier, the recesses having opening entrances at least on one processing side of the material carrier, and Introducing an abrasive material into the plurality of recesses.
  • the invention is based on the knowledge that the production of abrasive units without screen printing offers a large number of advantages.
  • abrasive units of higher quality can be produced with the method according to the first aspect. This production is also associated with less effort.
  • the multitude of recesses is made in the material carrier.
  • the material carrier preferably comprises a processing side and the recesses have passage axes which are aligned essentially parallel to an orthogonal of the processing surface.
  • the recesses are in particular arranged and designed in such a way that an abrasive material can be introduced into them.
  • the interior of the recesses is accessible at least from the machining side, in particular through the opening entrances.
  • the abrasive material is introduced into the multitude of recesses.
  • the abrasive material is introduced into one, two, several or all of the recesses.
  • the introduction of the abrasive material into the multiplicity of recesses can take place, for example, in such a way that the abrasive material is applied to the processing side of the material carrier and spread. Spreading can be done with a spatula, for example. Such application is also known as doctoring.
  • the excess abrasive material on the processing side is then removed again, so that the abrasive material is essentially arranged in the recesses.
  • the abrasive material is designed in particular to machine a workpiece by cutting, in particular by cutting with an indefinite cutting edge.
  • the abrasive material preferably comprises abrasive elements and a binding material.
  • the binding material is preferably arranged and designed to hold the abrasive elements in one position.
  • the abrasive elements are in particular arranged and designed to produce a cutting action on a workpiece.
  • the material carrier is designed to be flexible in shape and is preferably designed as a polishing cloth and / or as a polyurethane cloth. Furthermore, it can be preferred that the material carrier is or comprises a cloth-like textile product which comprises synthetic and / or natural fibers.
  • the fibers are preferably processed into woven fabrics, nonwovens and / or felt materials, the fibers also preferably being present as laminates and / or composite materials.
  • a material carrier that is designed to be flexible in shape can be reversibly changed in shape, the structure of the material carrier essentially remaining unchanged.
  • the material carrier is designed in particular in such a way that it is subject to abrasion in a grinding, polishing and / or lapping process.
  • the person skilled in the art understands in particular to be subject to abrasion that the material carrier exhibits greater abrasion than the abrasive material.
  • the material carrier, which is designed to be flexible in shape can preferably be designed as a polishing cloth.
  • the material carrier, which is designed to be flexible in shape is designed as a polyurethane cloth.
  • the material carrier can also be designed as the cloth-like textile product.
  • the cloth-like textile product comprises synthetic and / or natural fibers. These fibers can be used as fabrics, Nonwovens and / or felt fabrics can be processed. In addition, the fibers can also be in the form of laminates and / or composites.
  • Synthetic fibers are also known as artificial fibers.
  • the natural fibers can for example be or comprise cotton fibers.
  • the material carrier is designed as a plastic film and / or as a hard paper or includes this or this.
  • the material carrier can have a foamed material and / or a non-metallic material or consist of this or these, the foamed material preferably being a polyurethane foam.
  • the recesses can advantageously be made in a material carrier embodied as a plastic film or as a hard paper.
  • the recesses can also advantageously be made in a material carrier which consists of or comprises polyurethane foam.
  • the polyurethane foam also has micropores, which enable uniform abrasion and thus wear of the material carrier when a workpiece is machined.
  • the material carrier has a material carrier thickness of less than 5 mm, in particular less than 3 mm, preferably less than 1.5 mm.
  • the material carrier thickness is to be understood in particular as the thickness of the material carrier.
  • the material carrier thickness preferably extends in a direction which is parallel to a surface orthogonal of the processing side of the material carrier.
  • the material carrier is made hydrophilic.
  • a hydrophilic material carrier has the advantage that it can absorb at least a small amount of a liquid, in particular water. Since liquids are regularly used in grinding processes and in polishing processes, the abrasive unit can thus absorb part of the liquid, in particular the water.
  • this comprises the step: arranging the material carrier with a fastening side arranged opposite the processing side on a carrier plate, the carrier plate being designed to act as a coupling element between the abrasive unit and a processing machine.
  • the carrier plate preferably has essentially the same geometry as the material carrier.
  • the carrier plate can for example consist of metal or plastic or comprise metal or plastic.
  • the carrier plate preferably comprises one, two or more protruding sections.
  • the protruding sections can, for example, have a radius that is smaller than the radius of the carrier plate.
  • the projection sections preferably protrude in such a way that they can be used to dismantle the abrasive unit from a processing machine.
  • an essentially abrasive material-impermeable intermediate element in particular a plastic film, and / or a fastening element, in particular an adhesive film, is or are arranged on the fastening side of the material carrier, with the intermediate element and / or the Fastening element is arranged between the material carrier and the carrier plate.
  • the intermediate element is preferably arranged and designed in such a way that it extends essentially completely between the material carrier and the carrier plate.
  • the intermediate element which is impermeable to abrasive material, prevents abrasive material from getting from the recesses into the space between the material carrier and the carrier plate.
  • the recesses can also extend through the intermediate element and / or the fastening element.
  • the fastening element can be arranged between the material carrier and the carrier plate.
  • the fastening element can be designed, for example, as a double-sided adhesive film that remains adhered to the material carrier and to the carrier plate. This enables a connection between the material carrier and the carrier plate.
  • the intermediate element which is impermeable to abrasive material and the fastening element can also be designed as a single element.
  • the recesses are punched and / or grooved.
  • the recesses produced by a punching process and / or by a groove process can advantageously be produced and then filled with the abrasive material
  • the recesses are designed as blind holes and / or as through holes.
  • a blind hole has the advantage that the abrasive material cannot, as a rule, emerge on a side opposite the processing side.
  • the recesses designed as through holes have the advantage of being easier to manufacture.
  • a protective element in particular a protective film, is arranged on the processing side, and the recesses are made through the protective element into the material carrier, the protective element preferably after is removed when the abrasive material is introduced.
  • the protective element When the abrasive material is introduced, the protective element enables it to be introduced into the multiplicity of recesses and essentially not onto the processing side of the material carrier. This avoids the need for a further manufacturing step after the abrasive material has been introduced into the recesses, namely the removal of the excess abrasive material from the processing side of the material carrier.
  • the protective element can, for example, be removed from the material carrier after the abrasive material has been introduced.
  • an abrasive unit is provided whose processing side of the material carrier is essentially free of abrasive material, so that only abrasive material is arranged in the recesses and possibly protruding slightly upwards from the recesses.
  • the abrasive material is introduced in such a way that the abrasive material is essentially flush with the processing side and preferably the abrasive material forms an essentially flat surface with the processing side.
  • excess abrasive material can be removed after the abrasive material has been introduced into the plurality of recesses. For example, this removal can also take place during the doctoring or filling of the recesses.
  • An essentially flat surface also means that the abrasive material protrudes slightly from the recesses. For example, this can be the case if a protective element is arranged on the processing side and this is removed again after the abrasive material has been introduced. In this case, the abrasive material can protrude beyond the processing side, for example with the thickness of the protective element.
  • an abrasive unit for grinding, polishing and / or lapping comprising a material carrier with a plurality of recesses, the recesses having opening entrances at least on one processing side of the material carrier, and an abrasive material in the recesses is arranged.
  • the abrasive material is arranged in the recesses in such a way that the abrasive material forms an essentially flat surface with the processing side.
  • a substantially flat surface lies even if the abrasive material protrudes from one of the recesses with a cantilever height, the cantilever height being less than 20%, less than 10%, less than 5% or less than 2% of a recess depth.
  • the recess depth is either the distance between the processing side and a recess base, the distance between the processing side and the fastening side, or the material thickness of the material carrier.
  • the material carrier is designed to be flexible in shape and is preferably designed as a polishing cloth and / or as a polyurethane cloth, and / or is a cloth-like textile product that includes synthetic and / or natural fibers, preferably the Fibers are processed into woven fabrics, nonwovens and / or felt fabrics, the fibers also preferably being present as laminates and / or composites.
  • the material carrier is designed as a plastic film and / or as a hard paper or includes this or this.
  • the material carrier can have a foamed material and / or a non-metallic material or consist of this or these, wherein the foamed material is preferably a polyurethane foam.
  • the material carrier has a material carrier thickness of less than 5 mm, in particular less than 3 mm, preferably less than 1.5 mm, and / or is made hydrophilic.
  • the abrasive material comprises or consists of abrasive elements and / or a binding material, the abrasive elements preferably being selected from the group consisting of: diamond, alumina, silicon carbide, boron carbide, and / or cerium oxide, and / or the binding material comprises or consists of a single- or multi-component synthetic resin, preferably epoxy resin, and / or a UV-curing synthetic resin.
  • the abrasive elements of the abrasive material are in particular arranged and designed to cause material to be removed from a workpiece.
  • the binding material holds the abrasive elements in one position.
  • one, two, several or all of the recesses have a round, oval, triangular, polygonal, in particular hexagonal, and / or groove-shaped cross section and / or are designed as a spiral slot.
  • one, two, several or all of the recesses have a recess extension that is between 1 mm and 20 mm, preferably between 5 mm to 15 mm, in particular between 8 mm to 12 mm. In the case of a circular recess, the extension of the recess corresponds in particular to the diameter.
  • the material carrier has an edge area, the edge area adjoining an outer edge of the material carrier and extending with an edge area of up to 20 mm, preferably up to 10 mm, in the direction of a center point of the material carrier , wherein the edge area is essentially free of recesses.
  • first processing section adjoins the edge area and a second processing section having the center adjoins the first processing section, the recess extent of the recesses in the first processing section being smaller than the recess extent of the recesses in the second processing section, and / or a second The spacing between two recesses in the second processing section is smaller than a first spacing between two recesses in the first processing section.
  • the material carrier can comprise a central recess having the center point.
  • the wear in the second machining section is often greater than in the first machining section.
  • a substantially constant removal rate can thus be achieved with the abrasive unit.
  • the wear in the first processing section can, however, under certain circumstances also be greater. This greater wear can be countered in the first machining section with larger recesses.
  • the central recess is in particular arranged and designed to arrange the abrasive unit on a processing machine.
  • the central recess can be used for positioning.
  • At least two recesses are arranged in such a way that they are less than 10 mm, preferably less than 8 mm, in particular less than 5 mm, spaced from one another.
  • at least two recesses can be arranged in such a way that they are spaced apart from one another by more than 1 mm, in particular more than 4 mm.
  • a protective element in particular a protective film, is arranged on the machining side in such a way that essentially no abrasive material can flow between the machining side of the material carrier and the protective element. With the protective element, it can be avoided that there is abrasive material next to the recesses.
  • the abrasive unit comprises a carrier plate which is designed to act as a coupling element between the abrasive unit and a processing machine, the material carrier being arranged on the carrier plate with a fastening side arranged opposite the processing side.
  • the fastening side of the material carrier has an intermediate element that is essentially impermeable to abrasive material, in particular a plastic film, and / or a fastening element, in particular an adhesive film, with the intermediate element and / or the fastening element between the material carrier and the carrier plate is arranged.
  • the recesses can also extend through the intermediate element and / or the fastening element.
  • the object mentioned at the beginning is achieved by a processing machine for grinding, polishing and / or lapping workpieces, comprising an abrasive unit according to one of the embodiment variants described above.
  • the method and its possible further developments have features or method steps that make them particularly suitable for being used for an abrasive unit and a processing machine and the respective further developments.
  • design variants and design details of the further aspects and their possible further developments reference is also made to the description given above for the corresponding features and further developments of the method for producing an abrasive unit.
  • the abrasive unit shown includes the material carrier 100.
  • the material carrier 100 includes a plurality of recesses 104, 106, 108, 110, 112 and further recesses.
  • the recesses 104, 106, 108, 110, 112 with the abrasive material 118 and in Figure 2 shown without the abrasive material 118.
  • the recesses 104-112 can have different cross-sectional geometries.
  • the recess 104 has a round cross section, the recess 106 an oval cross section, the recess 108 a honeycomb-shaped, hexagonal cross section, the recess 110 a triangular cross section and the recess 112 a diamond-shaped cross section.
  • the material carrier 100 is designed as a body that is flexible in shape.
  • the material carrier 100 is designed as a polishing cloth.
  • the polishing cloth can for example consist of polyurethane or polyurethane include.
  • the material carrier 100 also has a circular geometry.
  • the ones in the Figures 1 and 2 The side of the material carrier 100 shown is the machining side 102.
  • the machining side 102 faces the workpiece to be machined when the abrasive unit 1 is operating as intended.
  • the opposite of the machining side 102, in Figure 4 and 5 The fastening side 103 shown faces away from the workpiece to be machined in normal operation.
  • the recesses 104 - 112 are provided at least as a blind hole with an opening entry on one side, the opening being provided at least on the processing side 102.
  • the abrasive material 118 which is shown in FIG Figure 1 shown in black, can be introduced into the recesses 104-112 starting from the machining side 102.
  • the modification shown of the abrasive unit 1 ′ has an edge region 120, a first processing section 122 and a second processing section 124.
  • the edge region 120 adjoins an outer edge of the material carrier 100 '. With a radially aligned edge region extension, the edge region extends in the direction of the center point 113.
  • the edge region 120 is essentially free of recesses.
  • the first machining section 122 is located radially inwardly adjoining the edge region 120.
  • the first processing section 122 has a sixth recess 116 and a multiplicity of further recesses, which are designed analogously to the sixth recess 116. Radially inwardly adjoining the first machining section 122, the second machining section 124 adjoins. The second machining section 124 has the first type of recess 104 already described above.
  • the recesses of the first processing section 122 and of the second processing section 124 differ in particular in terms of size, since the recesses of the first processing section 122 are smaller are. These smaller recesses in the first machining section 122 take into account that less wear occurs in this radially outer section of the material carrier 100 ′ during the machining process.
  • FIG. 13 shows a sectional view of the FIG Figure 1 and 2 1.
  • the material carrier 100 extends in the direction of its material thickness from the processing side 102 to the fastening side 103.
  • the material carrier 100 On the processing side 102, the material carrier 100 has openings from a large number of recesses 104.
  • the recesses 104 are designed as blind holes. This means in particular that these are not designed as through openings and do not extend as far as the fastening side 103.
  • An intermediate element 130 is arranged on the fastening side 103. During operation of the abrasive unit 1, the intermediate element 130 is preferably arranged between the abrasive unit 1 and a processing machine 200.
  • the intermediate element 130 can, for example, have an adhesive effect in order to fasten the abrasive unit 1 to the processing machine 200.
  • the recesses are designed as through holes so that they extend from the machining side 102 to the fastening side 103. So that the abrasive material arranged in the recesses 104 cannot run out on the fastening side, the intermediate element 130 is arranged here in the form of an intermediate element which is impermeable to abrasive material. In addition, the intermediate element 130 can also be designed as a fastening element, in particular as an adhesive film.
  • the material carrier 100 is arranged on a carrier plate 140 by means of the intermediate element 130.
  • the carrier plate 140 can also generally be referred to as a carrier element.
  • the material carrier 100 can be coupled to a processing machine 200 by means of the carrier plate 140.
  • a protective element 132 is arranged on the machining side 102.
  • the protective element 132 is preferably arranged on the material carrier 100 before the recesses 104 are made.
  • the protective element 132 covered in Essentially the machining side 102 completely. As a result, essentially no abrasive material 118 can get onto the processing side. After the abrasive material has been introduced into the recesses 104, the protective element 132 can be removed. As a result, the machining side 102 is essentially free of abrasive material.
  • Figure 6 shows another possible geometry of a recess 150.
  • the recess 150 is designed as a spiral groove or a spiral slot.
  • FIG. 7 shows schematically a processing machine 200 which is coupled to the abrasive unit 1, 1 '.
  • This coupling is preferably such that the processing machine 200 can set the abrasive unit 1, 1 'in a rotational movement, so that a workpiece can be processed by means of the abrasive unit 1, 1'.
  • Figure 8 shows a schematic method for producing an abrasive unit 1, 1 'for grinding, polishing and / or lapping.
  • step 300 a multiplicity of recesses 104 to 112 are made in a material carrier 100, 100 ′.
  • the recesses 104 to 112 have opening entrances at least on one processing side 102 of the material carrier 100, 100 '.
  • step 302 an abrasive material is introduced into the plurality of recesses 104 to 112.
  • step 304 the material carrier 100, 100 ′ is arranged on a carrier plate 140 with a fastening side 103 opposite the processing side 102.
  • the carrier plate 140 acts as a coupling element between the abrasive unit 1, 1 ′ and a processing machine 200.
  • a protective element 132 in particular a protective film, is arranged on the processing side 102.
  • the recesses 104 to 112 are made through the protective element in the material carrier 100, in particular before the abrasive material is introduced into the recesses 104 to 112.
  • step 306 is carried out before step 300.
  • the abrasive unit 1, 1 'described above and the method described above enable a more cost-effective production of an abrasive unit, with better quality also being achieved.
  • no screen printing process is required to produce the abrasive unit 1, 1 '.
  • the use of a screen printing stencil is therefore not necessary. This reduces the effort involved in producing the abrasive unit 1, 1 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP20200767.0A 2019-10-10 2020-10-08 Procédé de fabrication d'une unité abrasive Active EP3804907B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019127341.2A DE102019127341A1 (de) 2019-10-10 2019-10-10 Verfahren zur Herstellung einer Abrasiveinheit

Publications (3)

Publication Number Publication Date
EP3804907A1 true EP3804907A1 (fr) 2021-04-14
EP3804907C0 EP3804907C0 (fr) 2023-11-15
EP3804907B1 EP3804907B1 (fr) 2023-11-15

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Application Number Title Priority Date Filing Date
EP20200767.0A Active EP3804907B1 (fr) 2019-10-10 2020-10-08 Procédé de fabrication d'une unité abrasive

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EP (1) EP3804907B1 (fr)
DE (1) DE102019127341A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211515A1 (de) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifelement, Schleifmittel und Verfahren zur Herstellung des Schleifelements und/oder des Schleifmittels
DE102022211514A1 (de) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifelement, Schleifmittel und Verfahren zur Herstellung des Schleifelements und/oder des Schleifmittels

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021215122A1 (de) 2021-12-30 2023-07-06 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifmittel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999000218A1 (fr) * 1997-06-26 1999-01-07 Vereinigte Schmirgel- Und Maschinen-Fabriken Ag Corps abrasif souple
US20160114458A1 (en) * 2014-10-17 2016-04-28 Applied Materials, Inc. Polishing pads produced by an additive manufacturing process
DE102015216538B3 (de) * 2015-08-28 2016-10-13 DIABÜ-Diamantwerkzeuge Heinz Büttner GmbH Verfahren zum Herstellen eines mehrdimensional skalierbaren Werkzeugs

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369204B1 (fr) * 2002-06-03 2006-10-11 JSR Corporation Tampon de polissage et procédé de fabrication d'un tampon de polissage
DE20305995U1 (de) * 2003-04-15 2003-07-10 Ewald Schaumstoffe GmbH & Co. KG, 48683 Ahaus Polierscheibe
DE102014207047A1 (de) * 2014-04-11 2015-10-15 Robert Bosch Gmbh Schleifscheibe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999000218A1 (fr) * 1997-06-26 1999-01-07 Vereinigte Schmirgel- Und Maschinen-Fabriken Ag Corps abrasif souple
US20160114458A1 (en) * 2014-10-17 2016-04-28 Applied Materials, Inc. Polishing pads produced by an additive manufacturing process
DE102015216538B3 (de) * 2015-08-28 2016-10-13 DIABÜ-Diamantwerkzeuge Heinz Büttner GmbH Verfahren zum Herstellen eines mehrdimensional skalierbaren Werkzeugs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211515A1 (de) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifelement, Schleifmittel und Verfahren zur Herstellung des Schleifelements und/oder des Schleifmittels
DE102022211514A1 (de) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Schleifelement, Schleifmittel und Verfahren zur Herstellung des Schleifelements und/oder des Schleifmittels

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Publication number Publication date
EP3804907C0 (fr) 2023-11-15
DE102019127341A1 (de) 2021-04-15
EP3804907B1 (fr) 2023-11-15

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