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WO2025103592A1 - Outil abrasif, en particulier disque abrasif - Google Patents

Outil abrasif, en particulier disque abrasif Download PDF

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Publication number
WO2025103592A1
WO2025103592A1 PCT/EP2023/081948 EP2023081948W WO2025103592A1 WO 2025103592 A1 WO2025103592 A1 WO 2025103592A1 EP 2023081948 W EP2023081948 W EP 2023081948W WO 2025103592 A1 WO2025103592 A1 WO 2025103592A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
grinding tool
opening
support body
layer
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
PCT/EP2023/081948
Other languages
German (de)
English (en)
Inventor
Julian KRIEG
René KÖHNEN
Dominik Vogt
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.)
August Rueggeberg GmbH and Co KG
Original Assignee
August Rueggeberg GmbH and Co KG
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 August Rueggeberg GmbH and Co KG filed Critical August Rueggeberg GmbH and Co KG
Priority to PCT/EP2023/081948 priority Critical patent/WO2025103592A1/fr
Publication of WO2025103592A1 publication Critical patent/WO2025103592A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B24D7/12—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 with apertures for inspecting the surface to be abraded
    • 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
    • B24D7/10—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 with cooling provisions

Definitions

  • Grinding tool especially grinding wheel
  • the invention relates to a grinding tool, in particular a grinding wheel.
  • WO 2018/149 483 A1 discloses a grinding tool in the form of a grinding wheel.
  • the grinding tool comprises a support body to which an abrasive layer is directly attached.
  • the support body is first coated with an adhesive and then placed in an electrostatic field, so that the abrasive grains are moved toward the support body as a result of the electrostatic field and adhere there to the adhesive.
  • the abrasive layer can be formed in any desired three-dimensional shape depending on the shape of the support body.
  • the invention is based on the object of creating a grinding tool with improved grinding properties and improved ease of use.
  • the grinding tool should, in particular, be designed as a grinding disc.
  • a grinding tool having the features of claim 1.
  • At least one through-opening is formed in the support body.
  • the at least one through-opening or the respective through-opening is thus located within the support body.
  • the circumferential contour of the support body is not changed, in particular, by the at least one through-opening or the respective through-opening.
  • the at least one through-opening or the respective through- The access opening allows an operator to observe the workpiece and the flying sparks during grinding.
  • the at least one through opening thus forms a respective viewing window or viewing area for the workpiece being machined. This allows the operator to more easily and quickly adjust a suitable angle of attack of the grinding tool relative to the workpiece and thus the size and/or position of a working point of the grinding tool. The operator can thus use the grinding tool efficiently and with optimized wear.
  • the grinding tool or the support body exhibits a high degree of stability despite the at least one through-hole. This ensures smooth running of the grinding tool, so that wear is not increased and the service life of the grinding tool is not impaired.
  • the at least one through-opening or the respective through-opening enables improved removal of grinding dust during grinding. Grinding dust generated during grinding can be removed into the environment more easily and quickly thanks to an air flow through the at least one through-opening or the respective through-opening, so that the grinding dust does not impair further grinding. This improves the grinding performance of the grinding tool.
  • the at least one through-opening or the respective through-opening can be symmetrical and/or asymmetrical.
  • the at least one through-opening or the respective Through opening formed symmetrically with respect to at least one axis of symmetry.
  • the support body is in particular designed as a one-piece and/or in particular as non-metallic and/or in particular as electrically non-conductive.
  • the support body comprises, for example, at least one material from the group consisting of vulcanized fiber, cotton, plastic, glass fibers, and carbon fibers.
  • the support body is preferably a one-piece plastic support body.
  • the plastic support body is produced, for example, by an injection molding process, an additive manufacturing process, or a subtractive manufacturing process.
  • the support body is in particular three-dimensionally shaped.
  • the support body is preferably curved in a radial direction and/or in a circumferential direction relative to a rotational axis of the grinding tool.
  • the support body in particular has a geometrically defined shape and can have any desired shape or contour in an axial direction.
  • the support body is in particular designed as a support plate or support disk.
  • the support body of the grinding wheel is preferably made in one piece from plastic.
  • the grinding tool comprises a connecting element for clamping the grinding tool in a grinding tool drive and/or for rotating the grinding tool about a rotational axis by means of the grinding tool drive.
  • the connecting element is designed, for example, as a hub or a shaft.
  • the grinding tool designed as a grinding disc preferably comprises a hub as a connecting element, which is formed in a clamping area of the support plate.
  • the grinding tool has a grinding side facing the workpiece to be machined and a drive side facing the grinding tool drive.
  • the abrasive layer comprises at least abrasive grains and a base bond for securing the abrasive grains.
  • the base bond comprises a binder or adhesive. The binder serves to secure the abrasive grains.
  • the abrasive layer preferably comprises a top bond.
  • the top bond is applied to the secured abrasive grains.
  • the top bond comprises a binder and optionally abrasive-active fillers.
  • the binder of the top bond can be identical to or different from the binder for securing the abrasive grains.
  • the abrasive layer can be secured directly to the carrier body or indirectly via a backing layer on the carrier body. No abrasive layer is present in the region of the at least one through-opening.
  • the grinding layer is, in particular, three-dimensionally shaped.
  • the grinding layer is, in particular, curved in a radial direction and/or in a circumferential direction relative to a rotational axis of the grinding tool.
  • the three-dimensional shape of the grinding layer corresponds, in particular, to a part of a three-dimensionally shaped surface or an adhesive surface of the support body.
  • the abrasive grains preferably have a geometrically defined cutting edge.
  • the abrasive grains are, in particular, triangular in shape.
  • at least some of the abrasive grains are aligned relative to one another and/or to an adhesive surface of the support body.
  • a grinding tool according to claim 2 ensures improved grinding properties and improved operating comfort.
  • the interrupted central region is arranged in a radial direction between the clamping region and the closed outer region. Between the clamping region A closed inner region can be arranged in the radial direction between the interrupted central region and the interrupted central region.
  • the clamping region and/or the closed inner region and/or the interrupted central region and/or the closed outer region are in particular annular and/or arranged concentrically to the axis of rotation.
  • the closed inner region surrounds the clamping area in the radial direction.
  • the interrupted central region surrounds the clamping area and the closed inner region in the radial direction.
  • the closed outer region surrounds the clamping area, the closed inner region, and the interrupted central region in the radial direction.
  • the interrupted central region is interrupted in the radial direction and/or in the circumferential direction by at least one through-opening.
  • the closed outer region stabilizes the interrupted central region and thus the supporting body or the grinding tool. The grinding tool therefore runs very smoothly, which means that wear on the grinding tool is not increased and its service life is not impaired.
  • the interrupted central region begins in the radial direction with an inner end of the at least one through-opening and ends with an outer end of the at least one through-opening.
  • the closed outer region has a dimension AA in the radial direction.
  • the dimension AA corresponds to a distance of the at least one through-opening or the respective through-opening from a circumferential contour of the grinding tool or the support body in the radial direction.
  • the abrasive layer is arranged in the interrupted central region of the support body, in particular over the entire surface.
  • the abrasive layer can be arranged at least partially in the closed inner region and/or in the closed outer region.
  • the grinding tool comprises, in particular, a connecting element arranged or formed in the clamping area.
  • the connecting element is arranged or formed concentrically with the axis of rotation.
  • a grinding tool according to claim 3 ensures improved grinding properties and improved operating comfort. Because the circumferential contour of the closed outer region has a consistent direction of curvature, the support body has no recesses in the radial direction. This ensures high stability and smooth running.
  • the closed outer region is, in particular, annular.
  • the circumferential contour of the closed outer region or of the support body is, in particular, designed as a circle. The circumferential contour is, in particular, concentric with the axis of rotation of the support body or of the grinding tool.
  • a grinding tool according to claim 4 ensures improved grinding properties and improved operating comfort. Due to the fact that the grinding layer is arranged in the interrupted central region, an interrupted grinding region is formed. The interrupted grinding region is interrupted in the radial direction and/or in the circumferential direction by the at least one through-opening. No grinding layer is present in the region of the at least one through-opening, so that the respective through-opening forms a viewing window or a The respective viewing window or viewing area thus interrupts the grinding layer in the radial and/or circumferential direction.
  • the grinding layer can be arranged at least partially in a closed inner region and/or in a closed outer region of the support body, so that a closed inner grinding region and/or a closed outer grinding region is formed.
  • the closed inner grinding region and/or the closed outer grinding region is in particular annular and arranged in the radial direction directly adjacent to the interrupted grinding region, so that the grinding layer is continuous in the radial direction outside the at least one through-opening.
  • the grinding layer is preferably arranged over the entire surface in the closed inner region and/or in the closed outer region.
  • a grinding tool ensures improved grinding properties and improved ease of use.
  • the at least one reinforcement or the respective reinforcement is arranged in a border region at least partially around the associated through-opening.
  • the at least one reinforcement or the respective reinforcement is arranged on a drive side of the grinding tool or the support body.
  • the at least one reinforcement or the respective reinforcement surrounds the associated through-opening, in particular completely.
  • the at least one reinforcement or the respective reinforcement is in particular formed integrally with the support body.
  • the at least one reinforcement or reinforcements strengthen and stabilize the support body or grinding tool in the area of the respective through-opening. This ensures compliance with the relevant safety regulations and smooth running.
  • the at least one reinforcement creates a vacuum on the drive side of the grinding tool when the grinding tool rotates about the rotation axis. Due to the vacuum on the drive side, an air flow is generated through the at least one through-opening or through the respective through-opening, which enables improved removal of grinding dust and has a cooling effect.
  • a grinding tool according to claim 6 ensures improved grinding properties and improved operating comfort.
  • the respective front edge is arranged in front of the associated through-opening with respect to a predefined direction of rotation of the grinding tool, whereas the respective rear edge is arranged after the associated through-opening in the direction of rotation.
  • the rear edge and the front edge are in particular part of a reinforcement which is formed in a border region around the associated through-opening on the support body.
  • the front edge and the rear edge are arranged on a drive side of the support body or of the grinding tool.
  • the front edge and the rear edge are in particular formed integrally with the support body.
  • the front edge and the rear edge create a vacuum on the drive side, which creates an air flow from the grinding side through the corresponding through-hole to the drive side.
  • the airflow allows for the removal of grinding dust and has a cooling effect. Because the respective rear edge is raised relative to the corresponding front edge, the airflow is redirected at the rear edge, particularly toward a corresponding recess. This allows the grinding dust to be removed from the grinding tool into the environment in a desired manner.
  • a grinding tool according to claim 7 ensures improved grinding properties and improved ease of use.
  • the at least one depression or the respective depression is arranged on a drive side of the grinding tool.
  • the at least one depression or the respective depression is arranged in a circumferential direction of the grinding tool next to an associated through-opening.
  • the at least one depression or the respective depression is arranged between two through-openings adjacent in the circumferential direction.
  • the at least one depression or the respective depression extends in particular in the radial direction up to a circumferential contour of the support body or the grinding tool.
  • An air flow coming from the at least one through-opening or the respective through-opening can flow along the at least one recess or along the respective recess toward the environment. This allows grinding dust from the grinding side of the grinding tool to be discharged into the environment in the desired manner. Furthermore, the at least one recess or the respective recess reduces the flow resistance on the drive side, so that the air flow ensures a high cooling effect.
  • the at least one recess or the respective recess is, in particular, designed like a groove. formed, for example, in the form of a bead.
  • the at least one recess or the respective recess has, in particular, a width defined in the circumferential direction that widens in the radial direction.
  • each through-opening is assigned a reinforcement and/or a recess.
  • a grinding tool according to claim 8 ensures improved grinding properties and improved ease of use.
  • a plurality of through-openings are formed in the support body.
  • the through-openings can be of identical and/or different design.
  • the through-openings are formed at equal angular intervals around the axis of rotation.
  • the through-openings each have an inner end and an outer end.
  • the inner ends of the through-openings are at the same distance from the axis of rotation in the radial direction.
  • the outer ends of the through-openings are preferably at the same distance from the axis of rotation in the radial direction.
  • a grinding tool according to claim 9 ensures improved grinding properties and improved operating comfort.
  • the ratio FD/FS ensures, on the one hand, a sufficient field of vision for observing the workpiece through the at least one through-opening and, on the other hand, a sufficiently large grinding layer.
  • the larger the ratio FD/FS the larger the field of vision.
  • the The smaller the FD/FS ratio the larger the grinding layer. If multiple through holes are formed in the support body, the area FD is the sum of all partial areas of the through holes.
  • a grinding tool according to claim 10 ensures improved grinding properties and improved operating comfort.
  • the AD/AS ratio ensures, on the one hand, that an operator can adequately observe the workpiece or the grinding area and, on the other hand, that the stability of the workpiece or the grinding tool in the grinding area is maintained.
  • the larger the AD/AS ratio the better the grinding area can be observed by an operator.
  • the smaller the AD/AS ratio the higher the stability.
  • a grinding tool according to claim 11 ensures improved grinding properties and improved operating comfort.
  • the radial distance AA corresponds to a dimension of a closed outer region of the support body in the radial direction.
  • the ratio AA/AD ensures, on the one hand, that an operator can sufficiently observe the workpiece or the grinding area and, on the other hand, that the stability of the grinding tool or the support body is not impaired.
  • the larger the ratio AA/AD the larger the dimension of the closed outer region in relation to the dimension of the at least one through opening in the radial direction and the greater the stability.
  • the smaller the ratio AA/AD the larger the dimension of the at least one through opening and thus the observability of the workpiece or the grinding area.
  • a grinding tool according to claim 12 ensures improved grinding properties and improved ease of use.
  • the angle ⁇ enables alignment of the at least one through-opening or the respective through-opening to a desired setting angle of the grinding tool.
  • the angle ⁇ is defined between the radial direction and the main extension direction of the at least one through-opening or the respective through-opening in relation to an intersection point P.
  • the intersection point P lies within the respective through-opening and has the smallest distance from the axis of rotation in the radial direction. If several through-openings are formed in the support body, the through-openings can have identical angles ⁇ and/or different angles ⁇ .
  • a grinding tool according to claim 13 ensures improved grinding properties and improved operating comfort.
  • the L/B ratio enables adaptation of the at least one through-opening or the respective through-opening to the desired viewing area and the required stability of the grinding tool.
  • the at least one through-opening or the respective through-opening is designed as an elongated hole, where L/B > 1, in particular L/B > 1.5, and in particular L/B > 2.
  • a grinding tool ensures improved grinding properties and improved operating comfort.
  • the abrasive grains are fixed directly to the carrier body by means of a ground bond.
  • the ground bond comprises a binder or adhesive that serves to secure the abrasive grains to the carrier body.
  • the carrier body is bonded with the binder. or adhesive agent to form an adhesive surface.
  • the abrasive grains are transported to the adhesive surface, for example, using an electrostatic field, and adhere there. After the binder or adhesive agent has hardened, the abrasive grains are attached to the adhesive surface or the surface of the carrier body.
  • the carrier body itself thus forms a base for the abrasive grains or the abrasive layer.
  • the abrasive grains can be applied to the carrier body in one or more layers.
  • the abrasive layer preferably comprises only one layer of abrasive grains that are attached directly to the carrier body.
  • a grinding tool ensures improved grinding properties and improved ease of use.
  • the grinding layer is indirectly attached to the support body via the support layer.
  • the support layer is in particular annular and/or one-piece.
  • the support layer comprises in particular at least one material selected from the group of vulcanized fiber, rubber and paper.
  • the support layer is attached to the support body by means of a binder or adhesive.
  • the support layer is preferably attached to the support body with at least 80%, in particular with at least 90%, and in particular with at least 95% of its surface.
  • the grinding layer is attached to the support layer on a side opposite the support body.
  • the grinding layer and the support layer form in particular a coated abrasive that is attached to the support body.
  • Fig. 1 is a side view of a grinding tool in the form of a grinding wheel according to a first embodiment
  • Fig. 2 is a plan view of the grinding wheel in Fig. 1 to illustrate a grinding layer attached directly to a support body and through openings formed in the support body,
  • Fig. 3 is a rear view of the grinding wheel in Fig. 1 to illustrate reinforcements in a border area around the through openings and recesses,
  • Fig. 4 is a first sectional view through the grinding wheel along the section line IV-IV in Fig. 3,
  • Fig. 5 is a second sectional view through the grinding wheel along the section line V-V in Fig. 3,
  • Fig. 6 is an enlarged view of a detail VI in Fig. 5,
  • Fig. 7 is a plan view of a grinding tool in the form of a grinding wheel according to a second embodiment
  • Fig. 8 is a sectional view through the grinding wheel along the section line VIII-VIII in Fig. 7, and
  • Fig. 9 is an enlarged sectional view through the grinding wheel along the section line IX-IX in Fig. 7 in the area of one of the through openings.
  • the grinding tool 1 shown in Figures 1 to 6 is designed as a grinding wheel.
  • the grinding tool 1 comprises a support body 2 and an abrasive layer 3 arranged thereon.
  • the grinding tool 1 serves for grinding a workpiece W.
  • the workpiece W is, in particular, metallic.
  • the workpiece W is illustrated by way of example in Figure 4.
  • the abrasive layer 3 is only partially shown in Figures 1 and 2.
  • the grinding tool 1 forms an axis of rotation M.
  • the grinding tool 1 defines a grinding side S and a drive side A along the axis of rotation M.
  • the grinding tool 1 is driven in rotation about the axis of rotation M by means of a grinding tool drive (not shown).
  • the grinding tool 1 comprises a connecting element 4.
  • the connecting element 4 is designed as a hub and is arranged concentrically to the axis of rotation M.
  • the grinding layer 3 is arranged on the support body 2 on the grinding side S.
  • the grinding side S faces the workpiece W during grinding.
  • the drive side A faces the grinding tool drive during grinding.
  • the support body 2 is designed in the form of a support plate.
  • the support body 2 is made in one piece from a non-metallic material, for example, a plastic.
  • the support body 2 defines a circumferential contour UK, which is shaped like a circle.
  • through-openings D are formed in the support body 2, which are collectively referred to as through-openings D and individually as through-openings Di, D , D3, D4, D5 and De.
  • the through-openings D extend completely through the support body 2 in an axial direction, i.e., in the direction of the rotation axis M.
  • the through-openings D serve to observe the workpiece W during grinding. Accordingly, the through-openings D form viewing windows or viewing areas.
  • N of through-openings D the following generally applies: 1 ⁇ N ⁇ 24, in particular 2 ⁇ N ⁇ 12, and in particular 3 ⁇ N ⁇ 8.
  • the support body 2 forms in a radial direction R successively a clamping area 5, a closed inner area 6, an interrupted central area 7 and a closed outer area 8.
  • the clamping area 5 is flat.
  • the connecting element 4 is arranged or formed in the clamping area 5 concentrically to the rotation axis M.
  • the closed inner region 6 surrounds the clamping region 5.
  • the closed inner region 6 is ring-shaped and arranged concentrically to the rotation axis M.
  • the closed inner region 6 extends in the radial direction R from the clamping region 5 to the interrupted serve the central region 7 or up to the through openings D.
  • the closed inner region 6 forms a crank K, so that the interrupted central region 7 and the closed outer region 8 are spaced apart in the axial direction from the clamping region 5.
  • a clamping nut which serves to connect the grinding tool 1 to the grinding tool drive, is received in a receiving space formed by the crank K and is thus concealed. This ensures that the clamping nut does not come into contact with the workpiece W to be machined during grinding.
  • the grinding tool drive is spaced apart from the through openings D.
  • the interrupted central region 7 surrounds the clamping region 5 and the closed inner region 6.
  • the interrupted central region 7 is annular and arranged concentrically to the axis of rotation M.
  • the interrupted central region 7 extends in the radial direction R from an inner end of the through openings D to an outer end of the through openings D.
  • the interrupted central region 7 is interrupted in a circumferential direction C around the axis of rotation M and in the radial direction R by the through openings D. Due to the closed inner region 6 and the closed outer region 8, the through openings D are surrounded by the support body 2.
  • the closed outer region 8 surrounds the clamping region 5, the closed inner region 6 and the interrupted central region 7.
  • the closed outer region 8 is annular and arranged concentrically to the rotation axis M.
  • the closed outer region 8 extends in the radial direction R from the outer end of the through openings D to the circumferential contour UK. Due to its circular shape, the circumferential contour UK has a constant direction of curvature with respect to the rotation axis M.
  • the closed outer region 8 and the constant direction of curvature of the circumferential contour UK are ensured by the fact that the through openings D do not interrupt the closed outer region 8 and the circumferential contour UK and the support body 2 surrounds the through openings D.
  • the through-openings Di to De are arranged at equal angles or angular distances Acp around the rotation axis M.
  • the respective inner end of the through-openings D has a radial distance Ri from the rotational axis M, whereas the respective outer end of the through-openings D has a radial distance RA from the rotational axis M.
  • the through-openings D each have a main extension direction H, which forms an angle ⁇ with the radial direction R at an intersection point P.
  • the intersection point P lies within the respective through-opening D and has the smallest distance from the rotational axis M in the radial direction R.
  • the angle ⁇ is defined opposite to a predefined direction of rotation DR of the grinding tool 1.
  • angle ⁇ 0° ⁇ ⁇ ⁇ 60°, in particular 10° ⁇ ⁇ ⁇ 50°, and in particular 20° ⁇ a ⁇ 40°.
  • angle a for the through openings D can be identical and/or different.
  • the through-openings D have a length L in the main direction of extension H and a width B perpendicular to the main direction of extension H.
  • the general rule for the ratio L/B is: 0.5 ⁇ L/B ⁇ 10, in particular 1 ⁇ L/B ⁇ 8, and in particular 2 ⁇ L/B ⁇ 6.
  • the through-openings D are designed in the form of an elongated hole. The following applies in particular to the shape of the elongated hole: L/B > 1, in particular L/B > 1.5, and in particular L/B > 2.
  • the respective elongated hole has rounded corners.
  • the closed outer region 8 extends from the outer end of the through-openings D to the circumferential contour UK.
  • the circumferential contour UK has a radial distance Ru from the axis of rotation M in the radial direction R.
  • AA Ru - RA.
  • the radial dimension AA of the closed outer region 8 thus corresponds to the radial distance of the through-openings D from the circumferential contour UK.
  • the following generally applies to the ratio AA/AD: 0.05 ⁇ AA/AD ⁇ 0.5, in particular 0.1 ⁇ AA/AD ⁇ 0.4, and in particular 0.15 ⁇ AA/AD ⁇ 0.3.
  • the grinding layer 3 is arranged in the interrupted central region 7, in the closed outer region 8 and partially in the closed inner region 6. In the area of the through-openings D, there is no grinding layer 3.
  • the grinding layer 3 is only partially shown in Figures 1 to 6.
  • the grinding layer 3 comprises a base bond 9, abrasive grains 10 and a top bond 11.
  • the base bond 9 comprises a binder that provides an adhesive surface for the abrasive grains 10.
  • the binder of the base bond 9 and the top bond 11 can be identical or different.
  • the abrasive grains 10 are transported to the ground bond 9 or the bonding surface, for example, by an electrostatic field.
  • the abrasive grains 10 are thereby aligned with their central longitudinal axes relative to the support body 2 and relative to one another.
  • the abrasive grains 10 are triangular in cross-section.
  • the abrasive grains 10 thus have a geometrically defined cutting edge.
  • the grinding layer 3 is three-dimensionally shaped.
  • the grinding layer 3 is curved in the circumferential direction C and in the radial direction R.
  • the grinding layer 3 is annular. Because the grinding layer 3 is arranged partially in the closed inner region 6, completely in the interrupted central region 7, and completely in the closed outer region 8, the grinding layer 3 forms an inner closed grinding region Si, a middle interrupted grinding region SM, and an outer closed grinding region SA.
  • the middle interrupted grinding region SM corresponds to the interrupted central region 7 of the support body 2.
  • the closed outer grinding region SA corresponds to the closed outer region 8 of the support body 2.
  • the closed inner grinding region Si corresponds to an annular part of the closed inner region 6, which faces the through-openings D in the radial direction R.
  • the through-holes Di to De each have a corresponding area FDI to FD6.
  • the grinding layer 3 has an area Fs.
  • the following generally applies to a ratio FD/FS: 0.05 ⁇ FD/FS ⁇ 0.8, in particular 0.1 ⁇ FD/FS ⁇ 0.6, and in particular 0.15 ⁇ FD/FS ⁇ 0.4.
  • the grinding layer 3 extends in the radial direction R from a distance Rs from the rotation axis M to the distance Ru of the circumferential contour UK.
  • the following generally applies to a ratio AD/AS: 0.2 ⁇ AD/AS ⁇ 1, in particular 0.3 ⁇ AD/AS ⁇ 0.9, and in particular 0.4 ⁇ AD/AS ⁇ 0.8.
  • Each of the through-holes Di to De is assigned a reinforcement Vi to Ve and a recess Ti to Te.
  • the reinforcements are individually labeled Vi to Ve and collectively V. Accordingly, the recesses are individually labeled Ti to Te and collectively T.
  • the reinforcements Vi to Ve are arranged in a corresponding border area Ui to Ue around the corresponding through-hole Di to De.
  • the border areas are individually labeled Ui to Ue and collectively U.
  • the reinforcements V are identically designed and arranged in a respective border area U around the corresponding through-hole D.
  • the reinforcements V are arranged on the drive side A of the support body 2.
  • the reinforcements V are part of the support body 2 and are formed by it.
  • the Support body 2 has a greater material thickness than in the area of the recesses T.
  • the reinforcements V completely surround the respective associated through-opening D.
  • the reinforcements V each form a front edge 12 and a rear edge 13 when viewed in the circumferential direction C or in the predefined direction of rotation DR.
  • the front edge 12 is arranged in front of the rear edge 13 with respect to the predefined direction of rotation DR of the grinding tool 1.
  • the rear edge 13 is higher than the front edge 12.
  • the recesses T are arranged in front of the respective associated through-opening D and adjacent to the respective front edge 12 with respect to the predefined direction of rotation DR.
  • the recesses T are formed by the support body 2, which has a smaller material thickness in the region of the recesses T.
  • the recesses T have a width in the circumferential direction C that widens in the radial direction R.
  • the recesses T are preferably V-shaped in cross-section.
  • grinding tool 1 The functionality of grinding tool 1 is described in detail below:
  • the grinding tool 1 is connected in the usual way by means of the connecting element 4 to a grinding tool drive (not shown in detail), for example, to an angle grinder.
  • a drive shaft of the grinding tool drive is guided through the connecting element 4, designed as a hub, and the grinding tool 1 is connected in the clamping area 5 to the drive shaft of the grinding tool drive by means of a clamping nut.
  • the drive side A faces the grinding tool drive, whereas the grinding side S faces the workpiece W to be machined.
  • the grinding of the workpiece W is carried out by an operator. To do this, the operator guides the grinding tool 1 to the workpiece W and brings the grinding layer 3 into contact with the workpiece W.
  • the through-openings D form viewing areas, the operator can observe the workpiece W and the flying sparks through the through-openings D during the grinding process. This allows the operator to optimally adjust the angle of attack of the grinding tool 1 relative to the workpiece W and thus the size and/or position of a working point of the grinding layer 3. For example, the angle of attack or the working point is optimally adjusted when the flying sparks pass through the respective through-opening D approximately in the middle. Because the through-openings D are surrounded by the support body 2, the closed outer region 8 stabilizes the support body 2 or the grinding tool 1. Because the closed outer grinding region SA of the grinding layer 3 is arranged in the closed outer region 8, the closed outer region 8 of the support body 2 can also be used for grinding.
  • the air flow F is illustrated in Fig. 3 as an example for the through-opening Di. Starting from the respective through-opening D, the air flows out into the environment on the drive side A along the respective corresponding recess T. For this purpose, the air is deflected towards the respective front edge 12 and to the respective corresponding recess T due to the higher rear edge 13.
  • the air flow F removes grinding dust from the grinding side S through the through-openings D to the drive side A and from there into the environment, and cools the grinding layer 3. This improves the grinding performance of the grinding tool 1.
  • the abrasive layer 3 is applied directly to the support body 2, for example by electrostatic coating in an electrostatic field, the abrasive layer 3 can be three-dimensionally shaped or curved in any desired manner, and the abrasive grains 10 can be aligned relative to the support body 2 and relative to one another.
  • the grinding tool 1 in conjunction with the through-openings D surrounded by the support body 2, has improved grinding properties and improved operating comfort. Due to the enclosed outer region 8 and the reinforcements V, the grinding tool 1 has a user-friendly, smooth running and avoids an impact effect of the grinding tool 1 during grinding, thus reducing wear on the grinding tool 1 and strain on the operator. In particular, the grinding tool 1 can reduce the processing time and thus the strain on the operator.
  • a second exemplary embodiment of the invention is described below with reference to Figures 7 to 9.
  • the abrasive layer 3 is attached to the support body 2 via a support layer 14.
  • the abrasive layer 3 is only partially shown in Fig. 7.
  • the abrasive layer 3 is attached to the support layer 14 and forms abrasive material on a substrate.
  • the support layer 14 is of one-piece and annular design.
  • the abrasive layer 3 is attached to the support layer 14, which in turn is attached to the support body 2 with the side facing away from the abrasive layer 3.
  • the support layer 14 is fully covered with the Supporting body 2.
  • the supporting layer 14 is fastened in the interrupted central region 7 and partially in the closed inner region 6 and partially in the closed outer region 8.
  • the supporting layer 14 is made, for example, of vulcanized fiber, rubber, or paper.
  • the supporting layer 14 is fastened to the supporting body 2 by means of a binding agent.
  • the abrasive layer 3 is not bent or flexed and is therefore not broken.
  • the supporting layer 14 has through-openings which correspond in number, arrangement, and design to the through-openings D of the supporting body 2, so that the visible areas formed by the through-openings D are retained.

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

Abstract

L'invention concerne un outil abrasif (1), comprenant un corps de support (2) et une couche abrasive (3) disposée sur le corps de support (2). Au moins une ouverture traversante (D) est formée dans le corps de support (2) et est conçue de telle sorte qu'une pièce à travailler peut être observée pendant le meulage. L'au moins une ouverture traversante (D) est entourée par le corps de support (2). L'outil abrasif (1) présente des propriétés de meulage améliorées et un confort de fonctionnement amélioré.
PCT/EP2023/081948 2023-11-15 2023-11-15 Outil abrasif, en particulier disque abrasif Pending WO2025103592A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/081948 WO2025103592A1 (fr) 2023-11-15 2023-11-15 Outil abrasif, en particulier disque abrasif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/081948 WO2025103592A1 (fr) 2023-11-15 2023-11-15 Outil abrasif, en particulier disque abrasif

Publications (1)

Publication Number Publication Date
WO2025103592A1 true WO2025103592A1 (fr) 2025-05-22

Family

ID=88839140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/081948 Pending WO2025103592A1 (fr) 2023-11-15 2023-11-15 Outil abrasif, en particulier disque abrasif

Country Status (1)

Country Link
WO (1) WO2025103592A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002045908A1 (fr) * 2000-12-09 2002-06-13 Saint-Gobain Abrasives, Inc. Roues abrasives donnant la possibilite de voir les pieces usinees
US20020090900A1 (en) * 2001-01-10 2002-07-11 3M Innovative Properties Company Buckup plate assembly for grinding system
WO2018149483A1 (fr) 2017-02-14 2018-08-23 August Rüggeberg Gmbh & Co. Kg Procédé de production d'un outil de rectification et outil de rectification
DE102017216175A1 (de) * 2017-09-13 2019-03-14 Robert Bosch Gmbh Schleifartikel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002045908A1 (fr) * 2000-12-09 2002-06-13 Saint-Gobain Abrasives, Inc. Roues abrasives donnant la possibilite de voir les pieces usinees
US20020090900A1 (en) * 2001-01-10 2002-07-11 3M Innovative Properties Company Buckup plate assembly for grinding system
WO2018149483A1 (fr) 2017-02-14 2018-08-23 August Rüggeberg Gmbh & Co. Kg Procédé de production d'un outil de rectification et outil de rectification
DE102017216175A1 (de) * 2017-09-13 2019-03-14 Robert Bosch Gmbh Schleifartikel

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