Abstract
A grinding tool, in particular a diamond cup wheel, includes at least one main body, which has at least one connection region and at least one contact region, the contact region at least substantially completely surrounding the connection region when viewed in at least one main extension plane of the main body. The grinding tool further includes a plurality of grinding elements, which are arranged on the main body. The main body delimits a plurality of suction openings which, when viewed along a circumferential direction of the main body, are each arranged between at least two grinding elements of the plurality of grinding elements.
Claims
1. A grinding tool comprising: at least one main body that comprises at least one connection region and at least one contact region, which at least substantially completely surrounds the connection region as viewed in at least one plane of main extent of the main body; and a multiplicity of grinding elements arranged on the main body, wherein the main body delimits a multiplicity of suction extraction openings, each of which is arranged between at least two grinding elements of the multiplicity of grinding elements along a circumferential direction of the main body.
2. The grinding tool as claimed in claim 1, wherein: the multiplicity of grinding elements are arranged as groups of grinding elements on the main body, and each of the multiplicity of suction extraction openings is arranged between two groups of grinding elements as viewed along the circumferential direction of the main body.
3. The grinding tool as claimed in claim 1, wherein a ratio of a minimum distance of the suction extraction openings from a central axis of the main body to a maximum diameter of the contact region is at least 0.05.
4. The grinding tool as claimed in claim 1, wherein that a ratio of a maximum longitudinal extent of the suction extraction openings to a maximum diameter of the contact region is at most 0.9.
5. The grinding tool as claimed in claim 1, wherein each of the multiplicity of suction extraction openings, as viewed in the plane of main extent of the main body has a cross-sectional area of at least 195 mm.sup.2.
6. The grinding tool as claimed in claim 1, wherein the multiplicity of suction extraction openings includes at most five suction extraction openings.
7. The grinding tool as claimed in claim 1, wherein the multiplicity of suction extraction openings are arranged in the contact region and, as viewed in the plane of main extent of the main body, extend over at least 30% of a maximum radial extent of the contact region from a side of the contact region that delimits the connection region to an outer edge of the contact region.
8. The grinding tool as claimed in claim 1, wherein the suction extraction openings, as viewed in the plane of main extent of the main body, are arranged spaced apart from each other around a central axis over an angular range of at least 45°.
9. The grinding tool as claimed in claim 2, wherein at least one individual group of the groups of grinding elements comprises at most five grinding elements.
10. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements has at least one inner grinding element arranged in an inner edge region of the contact region on the main body delimiting the connection region, and a maximum of six inner grinding elements are arranged on the main body.
11. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least one outer grinding element arranged in an outer edge region of the contact region on the main body, and a maximum of six outer grinding elements are arranged on the main body.
12. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least two outer grinding elements and at least one inner grinding element, the at least two outer grinding elements are arranged in an outer edge region of the contact region and the at least one inner grinding element is arranged in an inner edge region of the contact region that delimits the connection region, and the inner grinding element, as viewed along the circumferential direction of the main body, is arranged between two outer grinding elements.
13. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least one radial grinding element, which is arranged in such a manner that a longitudinal axis of the radial grinding element is at least substantially parallel to a transverse axis of the main body, and the transverse axis intersects a central axis of the main body.
14. The grinding tool as claimed in claim 1, wherein the grinding tool is a diamond cup wheel.
Description
DRAWINGS
[0020] Further advantages are given by the following description of the drawings. The drawings show eight exemplary embodiments of the invention. The drawings, the description and the claims contain numerous features in combination. Persons skilled in the art will expediently also consider the features individually and combine them to form appropriate further combinations.
[0021] There are shown:
[0022] FIG. 1 a schematic representation of a grinding tool according to the invention, in a top view,
[0023] FIG. 2 a schematic representation of the grinding tool according to the invention, in a side view,
[0024] FIG. 3 a schematic representation of a first alternative design of a grinding tool according to the invention having four suction extraction openings, in a top view,
[0025] FIG. 4 a schematic representation of the first alternative design of the grinding tool according to the invention, in a side view,
[0026] FIG. 5 a schematic representation of a second alternative design of a grinding tool according to the invention having radially aligned grinding elements, in a top view,
[0027] FIG. 6 a schematic representation of a third alternative design of a grinding tool according to the invention having obliquely aligned inner grinding elements, in a top view,
[0028] FIG. 7 a schematic representation of a fourth alternative design of a grinding tool according to the invention having central grinding elements, in a top view,
[0029] FIG. 8 a schematic representation of a fifth alternative design of a grinding toll according to the invention having mutually staggered grinding elements, in a top view,
[0030] FIG. 9 a schematic representation of a sixth alternative design of a grinding tool according to the invention having five suction extraction openings, in a top view, and
[0031] FIG. 10 a schematic representation of a seventh alternative design of a grinding tool according to the invention having obliquely arranged inner and outer grinding elements, in a top view.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
[0032] FIG. 1 shows a grinding tool 10a in a plan view. Preferably, the grinding tool 10a is realized as a diamond cup wheel. It is also conceivable, however, for the grinding tool 10a to be of a different design that is considered appropriate by persons skilled in the art. The grinding tool 10a has a main body 12a, which comprises a connection region 14a and a contact region 16a. The contact region 16a surrounds the connection region 14a at least substantially completely as viewed in at least one plane of main extent 17a of the main body 12a. The plane of main extent 17a of the main body 12a is at least substantially perpendicular to a central axis 24a of the main body 12a (see FIG. 2). The grinding tool 10a has nine grinding elements 36a, 40a, which are arranged on the main body 12a. It is also conceivable, however, for the grinding tool 10a to have a number of grinding elements 36a, 40a that is other than nine, such as, for example, six grinding elements 36a, 40a, twelve grinding elements 36a, 40a or the like. The main body 12a delimits three suction extraction openings 20a, the suction extraction openings 20a, as viewed along a circumferential direction 22a of the main body 12a, being in each case arranged between at least two, in particular in each case three, grinding elements 36a, 40a of the grinding elements 36a, 40a. It is also conceivable, however, for the main body 12a to delimit a number of suction extraction openings 20a that is other than three, such as, for example, four, five, six or the like suction extraction openings 20a. The central axis 24a of the main body 12a is realized as an axis of rotational symmetry of the main body 12a and extends centrally through the connection region 14a. The central axis 24a is at least substantially perpendicular to the plane of main extent 17a of the main body 12a. In particular, the central axis 24a is realized as an axis of rotation about which the grinding tool 10a can be driven in rotation. Preferably, the circumferential direction 22a is arranged, within the plane of main extent 17a of the main body 12a, along a circular path of which the mid-point is located on the central axis 24a. The connection region 14a and the contact region 16a, as viewed in the plane of main extent 17a of the main body 12a, are realized in the shape of a circular ring and are centered around the central axis 24a. In particular in a design of the grinding tool 10a in which the main body 12a, in particular the connection region 14a and/or the contact region 16a, in particular as viewed in the plane of main extent 17a of the main body 12a, has a basic shape that is other than a circular ring, other designs of the circumferential direction 22a are also conceivable. The main body 12a has a contact surface 26a in the contact region 16a on a side that in particular faces away from the connection region 14a, the grinding elements 36a, 40a being arranged on the contact surface 26a.
[0033] The grinding elements 36a, 40a are arranged in groups, in particular symmetrically in groups, distributed around the central axis 24a, as viewed in the plane of main extent 17a of the main body 12a. The suction extraction openings 20a are arranged in symmetrically distributed manner around the central axis 24a, as viewed in the lane of main extent 17a of the main body 12a. The suction extraction openings 20a are delimited by inner surfaces 28a of the main body 12a which, as viewed in the plane of main extent 17a of the main body 12a, span a maximum angular range 98a around the central axis 24a, the grinding elements 36a, 40a being arranged outside the maximum angular ranges 98a of the inner surfaces 28a. The suction extraction openings 20a delimited by the main body 12a are preferably all realized identically. The grinding elements 36a, 40a are preferably all realized identically. It is also conceivable, however, for the grinding elements 36a, 40a and/or the suction extraction openings 20a to be realized differently.
[0034] The grinding elements 36a, 40a, as viewed in the plane of main extent 17a of the main body 12a, individually have a cross-sectional area 32a that corresponds to a value from a value range of from 120 mm.sup.2 to 300 mm3, preferably 170 mm.sup.2 to 220 mm.sup.2, particularly preferably 190 mm.sup.2 to 195 mm.sup.2, and very particularly preferably 192 mm.sup.2. The grinding elements 36a, 40a, along a longitudinal axis 119a of the grinding elements 36a, 40a, individually have a maximum extent 34a that corresponds to a value from a value range of, in particular, from 20 mm to 30 mm, preferably 22 mm to 26 mm, particularly preferably 23 mm to 25 mm and very particularly preferably of 24 mm. The grinding elements 36a, 40a, at least substantially perpendicular to the longitudinal axes 119a of the grinding elements 36a, 40a, individually have a maximum transverse extent 35a that corresponds to a value from a value range of, in particular, from 6 mm to 10 mm, preferably 7 mm to 9 mm, particularly preferably 7.5 mm to 8.5 mm and very particularly preferably of 8 mm. Three of the grinding elements 36a, 40a are realized as inner grinding elements 36a, the inner grinding elements 36a, as viewed in the plane of main extent 17a of the main body 12a, being arranged at least substantially completely in an inner edge region 38a of the contact region 16a on the main body 12a that delimits the connection region 14a. Six of the grinding elements 36a, 40a are realized as outer grinding elements 40a, the outer grinding elements 40a, as viewed in the plane of main extent 17a of the main body 12a, being arranged at least substantially completely in an outer edge region 42a of the contact region 16a on the main body 12a. Preferably, the grinding elements 36a, 40a, in particular the outer grinding elements 40a and the inner grinding elements 16a, are arranged in such a manner that the longitudinal axes 119a of the grinding elements 36a, 40a have an angle 120a with respect to a maximum diameter 64a of the main body 12a, which in each case passes through a mid-point 117a of the grinding elements 36a, 40a, that corresponds to a value from a value range of, in particular, from 82° to 98°, preferably 85° to 95°, particularly preferably 88° to 92° and very particularly preferably 90°.
[0035] In particular, the outer edge region 42a, preferably as viewed in the plane of main extent 17a of the main body 12a, extends within a minimum radial distance 44a from an outer edge 46a of the grinding tool 10a, in particular of the contact region 16a, the minimum radial distance 44a corresponding to a value from a value range of, in particular, from 6 mm to 16 mm, preferably 8 mm to 14 mm, particularly preferably 9 mm to 11 mm and very particularly preferably of 10 mm. Preferably, the inner edge region 38a, preferably as viewed in the plane of main extent 17a of the main body 12a, extends within a minimum radial distance 48a from an inner edge 50a of the contact region 16a that delimits the connection region 14a, the minimum radial distance 48a corresponding to a value from a value range of, in particular, from 6 mm to 16 mm, preferably 8 mm to 14 mm, more preferably 9 mm to 11 mm and very particularly preferably of 10 mm. The inner grinding elements 36a, as viewed in the plane of main extent 17a of the main body 12a, have a minimum distance 52a from the central axis 24a that corresponds to a value from a value range of, in particular, from 35 mm to 50 mm, preferably 40 mm to 45 mm, particularly preferably 41 mm to 43 mm and very particularly preferably of 42 mm. In particular, the outer grinding elements 40a each have a lateral surface 54a, the outer grinding elements 40a being arranged in such a manner that the lateral surfaces 54a of the outer grinding elements 40a, as viewed from the central axis 24a, are arranged in a plane with the outer edge 46a of the main body 12a, in particular of the contact region 16a. The grinding elements 36a, 40a of the grinding tool 10a are realized as diamond grinding elements. The grinding elements 36a, 40a each individually comprise a multiplicity of diamond particles 58a on a side 56a of the grinding elements 36a, 40a that faces away from the contact surface 26a. Preferably, the grinding elements 36a, 40a have a curved shape. The grinding elements 36a, 40a, as viewed in the plane of main extent 17a of the main body 12a, each have two lateral surfaces 60a, which are at least substantially rectilinear, the two lateral surfaces 60a being transverse to the circumferential direction 22a. The grinding elements 36a, 40a, as viewed in the plane of main extent 17a of the main body 12a, each have two further lateral surfaces 62a, which at least partially are at least substantially parallel to the circumferential direction 22a and transverse to the maximum diameter 64a of the main body 12a, in particular of the contact region 16a. In particular, the further lateral surfaces 62a, as viewed in the plane of main extent 17a of the main body 12a, are at least partially rectilinear and are curved in an edge region of the further lateral surfaces 62a. However, other designs of the grinding elements 36a, 40a are also conceivable.
[0036] The suction extraction openings 20a are arranged at least substantially entirely within the contact region 16a, as viewed in the plane of main extent 17a of the main body 12a. The main body 12a, in particular the contact region 16a and the connection region 14a, are realized in one piece. The main body 12a delimits, within the connection region 14a around the central axis 24a, at least one recess 66a for fastening the grinding tool 10a to a grinding tool machine. The recess 66a delimited by the connection region 14a, as viewed in the plane of main extent 17a of the main body 12a, is realized in the shape of a circular surface. A maximum diameter 68a of the recess 66a has a value from a value range of, in particular, from 15 mm to 30 mm, preferably 20 mm to 26 mm, more preferably 22 mm to 24 mm and very particularly preferably of 23 mm. The connection region 14a has a maximum diameter 70a corresponding to a value from a value range of, in particular, from 60 mm to 85 mm, preferably 70 mm to 80 mm, particularly preferably 75 mm to 79 mm and very particularly preferably of 77 mm. The contact region 16a has a maximum radial extent 72a around the central axis 24a that corresponds to a value from a value range of, in particular, from 15 mm to 30 mm, preferably 20 mm to 26 mm, particularly preferably 22 mm to 24 mm and very particularly preferably of 23 mm.
[0037] The grinding elements 36a, 40a are arranged as groups 74a of grinding elements 36a, 40a on the main body 12a. The groups 74a of grinding elements 40a each individually comprise two outer grinding elements 40a and one inner grinding element 36a, the two outer grinding elements 40a of the group 74a being arranged in the outer edge region 42a of the contact region 16a, and the inner grinding element 36a of the group 74a being arranged in the inner edge region 38a of the contact region 16a that delimits the connection region 14a, and the inner grinding element 36a of the group 74a, as viewed along the circumferential direction 22a of the main body 12a, being arranged at least substantially completely between the two outer grinding elements 40a of the group 74a. The suction extraction openings 20a are in each case arranged between two groups 74a of grinding elements 36a, 40a, as viewed along the circumferential direction 22a of the main body 12a. Each of the groups 74a of grinding elements 36a, 40a comprises three grinding elements 36a, 40a. In particular, the two outer grinding elements 40a and the inner grinding element 36a, which in particular are arranged along the circumferential direction 22a between two of the suction extraction openings 20a, in each case form a group 74. The grinding tool 10a has three groups 74a of grinding elements 36a, 40a. A ratio of a minimum distance 75a of the suction extraction openings 20a delimited by the main body 12a from the central axis 24a of the main body 12a to a maximum diameter 76a of the contact region 16a corresponds to a value from a value range of, in particular, from 0.2 to 0.4, preferably 0.3 to 0.38, more preferably 0.34 to 0.36 and very particularly preferably of 0.35. Preferably, the maximum diameter 76a of the contact region 16a corresponds to a value from a value range of, in particular, from 100 mm to 185 mm, preferably 120 mm to 150 mm, particularly preferably 122 mm to 130 mm and very particularly preferably 123 mm, in particular to the maximum diameter 64a of the main body 12a. However, other designs of the grinding tool 10a, in particular of the suction extraction openings 20a, are also conceivable, for example having a value of the maximum diameter 64a, 76a of the main body, in particular of the contact region 16a, from a value range of from 100 mm to 105 mm, 110 mm to 115 mm, 145 mm to 155 mm or 175 mm to 185 mm. The radial distance 75a of an inner, in particular innermost, surface 28a of the main body 12a, that faces away from the central axis 24a and delimits a suction extraction opening 20a, from the central axis 24a has a value from a value range of, in particular, from 30 mm to 50 mm, preferably 37 mm to 45 mm, particularly preferably 40 mm to 43 mm and very particularly preferably of 42 mm. In particular, a minimum radial distance 75a from the suction extraction openings 20a to the central axis 24a of the main body 12a is greater than a minimum radial distance 52a from one of the inner grinding elements 36a to the central axis 24a. Preferably, a maximum radial distance 82a from the suction extraction openings 20a to the central axis 24a of the main body 12a is less than a maximum radial distance 84a from one of the outer grinding elements 40a to the central axis 24a.
[0038] A ratio of a maximum longitudinal extent 86a of the suction extraction openings 20a delimited by the main body 12a to the maximum diameter 76a of the contact region 16a corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.25, particularly preferably 0.19 to 0.21 and very particularly preferably of 0.2. In particular, the maximum longitudinal extent 86a of the suction extraction openings 20a is at least substantially parallel to the plane of main extent 17a of the main body 12a. The maximum longitudinal extent 86a of the suction extraction openings 20a has a value from a value range of, in particular, from 20 mm to 30 mm, preferably 23 mm to 27 mm, particularly preferably 24 mm to 26 mm and very particularly preferably of 25 mm. The suction extraction openings 20a, as viewed in the plane of main extent 17a of the main body 12a, have a maximum transverse extent 88a that corresponds to a value from a value range of, in particular, from 10 mm to 14 mm, preferably 11 mm to 13 mm, particularly preferably 11.5 mm to 12.5 mm and very particularly preferably of 12 mm. The maximum transverse extent 88a is at least substantially parallel to a maximum diameter 64a, 76a of the main body 12a, in particular of the contact region 16a, and at least substantially perpendicular to the maximum longitudinal extent 86a of the suction extraction openings 20a. For example, the suction extraction openings 20a delimited by the main body 12a, in particular inner surfaces 28a of the main body 12a delimiting the suction extraction openings 20a, have an at least partially round contour as viewed in the plane of main extent 17a of the main body 12a. The contour of the suction extraction openings 20a delimited by the main body 12a, in particular of the inner surfaces 28a of the main body 12a delimiting the suction extraction openings 20a, is realized as a as a closed line segment, which comprises two sides that are of equal length and parallel to each other and that in each case are connected at their ends, which in each case are aligned in the same direction, via a semicircular side. In particular, inner surfaces 28a of the main body 12a that delimit the suction extraction openings 20a are at least substantially perpendicular to the plane of main extent 17a or the main body 12a or oblique to the plane of main extent 17a of the main body 12a. The suction extraction openings 20a individually have a longitudinal axis 90a along which the maximum longitudinal extent 86a is aligned. Preferably, the suction extraction openings 20a are arranged in such a manner that the longitudinal axis 90a, in particular as viewed in the plane of main extent 17a of the main body 12a, is at least substantially perpendicular to a maximum diameter 64a, 76a of the main body 12a, in particular of the contact region 16a.
[0039] The suction extraction openings 20a delimited by the main body 12a, as viewed in the plane of main extent 17a of the main body 12a, individually have a cross-sectional area 92a that corresponds to a value from a value range of, in particular, from 195 mm.sup.2 to 365 mm.sup.2, preferably 240 mm.sup.2 to 300 mm.sup.2, particularly preferably 260 mm.sup.2 to 280 mm.sup.2 and very particularly preferably of 269.1 mm.sup.2. In particular, a ratio of a total cross-sectional area of the suction extraction openings 20a, which is formed in particular from a sum of the cross-sectional areas 92a of the suction extraction openings 20a, to a total area of the contact surface 26a corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.16 to 0.26, particularly preferably 0.2 to 0.22 and very particularly preferably of 0.213. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20a to a total cross-sectional area of the main body 12a in the plane of main extent 17a of the main body 12a corresponds to a value from a value range of, in particular, from 0.05 to 0.2, preferably 0.1 to 0.15, particularly preferably 1.12 to 0.13 and very particularly preferably 0.124. The cross-sectional areas 92a of the suction extraction openings 20a are surrounded, in the plane of main extent 17a of the main body 12a, by the inner surfaces 28a of the main body 12a that delimit the suction extraction openings 20a. The cross-sectional areas 92a of the suction extraction openings 20a in the plane of main extent 17a of the main body 12a individually each have at least one basic shape, which is delineated in particular by the contour of the suction extraction openings 20a, in particular of the inner surfaces 28a. The suction extraction openings 20a delimited by the main body 12a are arranged in the contact region 16a and, as viewed in the plane of main extent 17a of the main body 12a, extend over in particular 30-70%, preferably 45-55%, particularly preferably 50-54% and very particularly preferably 52.2%, of the maximum radial extent 72a of the contact region 16a, in particular from the inner edge 50a of the contact region 16a that delimits the connection region 14a to the outer edge 46a of the contact region 16a. The suction extraction openings 20a delimited by the main body 12a, as viewed in the plane of main extent 17a of the main body 12a, are arranged spaced apart from each other around a central axis 24a of the main body 12a over an angular range 96a, the angular range 96a extending over, in particular, from 40° to 100°, preferably 70° to 95°, particularly preferably 88° to 95° and very particularly preferably 91°. Preferably, the angular range 98a spanned by the individual suction extraction openings 20a extends around the central axis 24a over, in particular, from 10° to 60°, preferably 20° to 40°, particularly preferably 25° to 30° and very particularly preferably 28.6°.
[0040] FIG. 2 shows a cross-section of the grinding tool 10a that is at least substantially perpendicular to the plane of main extent 17a of the main body 12a, in particular the sectional plane shown in FIG. 1. The main body 12a is at least partially cup-shaped within the connection region 14a. In particular, in a region 100a of the connection region 14a surrounding the recess 66a delimited by the connection region 14a, the connection region 14a is planar. Within the connection region 14a, the main body 12a comprises a wall 102a that is transverse to the contact region 16a. In particular, the wall 102a of the main body 12a has an angle 104a with respect to the plane of main extent 17a of the main body 12a of, in particular, from 30° to 80°, preferably 50° to 80°, more preferably 70° to 78° and very particularly preferably 75.2°. The main body 12a has, preferably within the contact region 16a, in particular at least substantially perpendicular to the plane or main extent 17a of the main body 12a, a maximum thickness 106a that corresponds to a value from a value range of, in particular, from 1 mm to 10 mm, preferably 2 mm to 6 mm, particularly preferably 3 mm to 5 mm and very particularly preferably of 4 mm. The grinding elements 36a, 40a, at least substantially parallel to the central axis 24a, individually have a maximum thickness 108a that corresponds to a value from a value range of, in particular, from 1 mm to 10 mm, preferably 2 mm to 7 mm, particularly preferably 4 mm to 6 mm and very particularly preferably of 5 mm.
[0041] FIGS. 3 to 10 show further exemplary embodiments of the invention. The descriptions and the drawings that follow are limited substantially to the differences between the exemplary embodiments, and in principle reference may also be made to the drawings and/or the description of the other exemplary embodiments, in particular of FIGS. 1 and 2, in respect of components that have the same designation, in particular in respect of components denoted by the same references. To distinguish the exemplary embodiments, the letter a has been appended to the references of the exemplary embodiment in FIG. 1. In the exemplary embodiments of FIGS. 2 to 8, the letter a is replaced by the letters b to h.
[0042] FIG. 3 shows a first alternative design of a grinding tool 10b realized as a diamond cup wheel, in a plan view. The grinding tool 10b has a main body 12b comprising a connection region 14b and a contact region 16b. The contact region 16b at least substantially completely surrounds the connection region 14b as viewed in at least one plane of main extent 17b of the main body 12b. The grinding tool 10b has twelve grinding elements 36b, 40b arranged on the main body 12b. It is also conceivable, however, for the grinding tool 10b to have a number of grinding elements 36b, 40b that is other than twelve. The main body 12b delimits four suction extraction openings 20b which, as viewed along a circumferential direction 22b of the main body 12b, are arranged in each case between at least two, in particular in each case three, of the grinding elements 36b, 40b. It is also conceivable, however, for the main body 12b to delimit a number of suction extraction openings 20b that is other than four. The grinding tool 10b represented in FIG. 3 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10b represented in FIG. 3. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10b represented in FIG. 3 preferably has four suction extraction openings 20b and four groups 74b of grinding elements 36b, 40b, each group 74b of grinding elements 36b, 40b comprising two outer grinding elements 40b and one inner grinding element 36b. The inner grinding element 36b of an individual group 74b is arranged at least partially between the two outer grinding elements 40b of the group 74b as viewed along a circumferential direction 22b. The grinding elements 36b, 40b and the suction extraction openings 20b are preferably realized in respect of their dimensions, in the plane of main extent 17b of the main body 12b, in a manner identical to the grinding elements 36a, 40a and the suction extraction openings 20a of the grinding tool 10a described in FIGS. 1 and 2. The suction extraction openings 20b delimited by the main body 12b, as viewed in the plane of main extent 17b of the main body 12b, are arranged spaced apart from each other around a central axis 24b of the main body 12b over an angular range 96b of, in particular, from 30° to 90°, preferably 50° to 70°, particularly preferably 58° to 65° and very particularly preferably 61.4°. Preferably, an angular range 98b spanned by the individual suction extraction openings 20b extends around the central axis 24b over, in particular, from 10° to 50°, preferably 20° to 40°, more preferably 25° to 32° and very particularly preferably 28.6°. In particular, a ratio of a total cross-sectional area of the suction extraction openings 20b, which is formed in particular from a sum of the cross-sectional areas 92b of the suction extraction openings 20b, to a total area of the contact surface 26b corresponds to a value from a value range of, in particular, from 0.1 to 0.5, preferably 0.22 to 0.38, particularly preferably 0.28 to 0.32 and very particularly preferably 0.306. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20b to a total cross-sectional area of the main body 12b in the plane of main extent 17b of the main body 12b corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.2, particularly preferably 0.17 to 0.18 and very particularly preferably 0.173.
[0043] FIG. 4 shows a cross-section of the grinding tool 10b that is at least substantially perpendicular to the plane of main extent 17b of the main body 12b, in particular the sectional plane shown in FIG. 3.
[0044] FIG. 5 shows a second alternative design of a grinding tool 10c realized as a diamond cup wheel, in a plan view. The grinding tool 10c has a main body 12c comprising a connection region 14c and a contact region 16c. The contact region 16c surrounds the connection region 14c at least substantially completely as viewed in at least one plane of main extent 17c of the main body 12c. The grinding tool 10c has nine grinding elements 40c, 110c arranged on the main body 12c. It is also conceivable, however, for the grinding tool 10c to have a number of grinding elements 40c, 110c that is other than nine.
[0045] The main body 12c delimits three suction extraction openings 20c which, as viewed along a circumferential direction 22c of the main body 12c, are in each case arranged between at least two, in particular in each case three, of the grinding elements 40c, 110c. It is also conceivable, however, for the main body 12c to delimit a number of suction extraction openings 20c that is other than three. The grinding tool 10c represented in FIG. 5 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10c represented in FIG. 5. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10c represented in FIG. 5 preferably has three radial grinding elements 110c and six outer grinding elements 40c. The radial grinding elements 110c each have a longitudinal axis 112c that is at least substantially parallel to a maximum diameter 64c, 76c of the main body 12c, in particular of the contact region 16c. The radial grinding element 110c is arranged in such a manner that the longitudinal axis 112c of the radial grinding element 110c is at least substantially parallel to a transverse axis 113c and/or a maximum diameter 64c, 76c or the main body 12c, in particular of the contact region 16c, the transverse axis 113c intersecting the central axis 24c of the main body 12c. In particular, the longitudinal axes 112c of the radial grinding elements 110c intersect at a point on a central axis 24c of the main body 12c. Preferably, the longitudinal axes 112c of the radial grinding elements 110c are at least substantially perpendicular to the circumferential direction 22c and/or transverse to a longitudinal axis 114c of one of the outer grinding elements 40c that forms part of the same group 74c of grinding elements 40c, 110c as the radial grinding element 110c, respectively. The radial grinding elements 110c are arranged at least partially within an outer edge region 42c and an inner edge region 38c of the contact region 16c on the main body 12c. The radial grinding elements 110c have a maximum radial extent 116c that is greater than a maximum radial extent 118c of the suction extraction openings 20c, in particular along a maximum diameter 64c, 76c of the main body 12c, particularly of the contact region 16c. The grinding elements 40c, 110c of the grinding tool 10c form three groups 74c of grinding elements 40c, 110c, each group 74c comprising two outer grinding elements 40c and one radial grinding element 110c. The radial grinding element 110c of an individual group 74c of grinding elements 40c, 110c, as viewed along the circumferential direction 22c, is in each case arranged between the two outer grinding elements 40c of the group 74c. The radial grinding elements 110c are preferably realized with respect to dimensions of the grinding elements 40c, 110c, in the plane of main extent 17c of the main body 12c, in a manner identical to the outer grinding elements 40c, and preferably differ only in an arrangement on the main body 12c. Also conceivable, however, are other designs of the grinding tool 10c, in particular of the radial grinding elements 110c, for example with a different arrangement of the radial grinding elements 110c relative to the suction extraction openings 20c.
[0046] FIG. 6 shows a third alternative design of a grinding tool 10d realized as a diamond cup wheel, in a plan view. The grinding tool 10d has a main body 12d comprising a connection region 14d and a contact region 16d. The contact region 16d surrounds the connection region 14d at least substantially completely as viewed in at least one plane of main extent 17d of the main body 12d. The grinding tool 10d comprises eight grinding elements 36d, 40d arranged on the main body 12d. It is also conceivable, however, for the grinding tool 10d to have a number of grinding elements 36d, 40d that is other than eight. The main body 12d delimits four suction extraction openings 20d which, as viewed along a circumferential direction 22d of the main body 12d, are in each case arranged at least partially between at least two, in particular in each case two, of the grinding elements 36d, 40d. It is also conceivable, however, for the main body 12d to delimit a number of suction extraction openings 20d that is other than four. The grinding tool 10d represented in FIG. 6 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool ltd represented in FIG. 6. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10d represented in FIG. 6 preferably has four groups 74d of grinding elements 36d, 40d that in each case are arranged between two of the suction extraction openings 20d. The grinding elements 36d, 40d are preferably realized in respect of their dimensions, in the plane of main extent 17d of the main body 12d, in a manner identical to the grinding elements 36a, 40a of the grinding tool 10a described in FIGS. 1 and 2. Each of the groups 74d of grinding elements 36d, 40d comprises an outer grinding element 40d and an inner grinding element 36d, the inner grinding element 36d being transverse to the circumferential direction 22d and to a maximum diameter 64d, 76d of the main body 12d, in particular of the contact region 16d. The inner grinding element 36d is arranged, in particular, at least partially within an inner edge region 38d of the contact region 16d. The inner grinding element 36d has a longitudinal axis 119d that has an angle 120d of, in particular, from 30° to 82°, preferably 50° to 85°, more preferably 65° to 75° and very particularly preferably 70°, with respect to an axis 124d of the main body 12d that passes through a mid-point 117d of the inner grinding element 36d and along a maximum diameter 64d, 76d of the main body 12d, in particular of the contact region 16d. The outer grinding element 40d, as viewed in the plane of main extent 17d of the main body 12d, is arranged spaced apart from an outer edge 46d of the main body 12d and/or of the contact region 16d within an outer edge region 42d of the contact region 16d, the outer edge region 42d, preferably as viewed in the plane of main extent 17d of the main body 12d, extending within a minimum radial distance 44d that has a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 18 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm, from the outer edge 46d of the grinding tool 10d, in particular of the contact region 16d. In particular, the outer grinding elements 40d have a maximum distance 122d from the outer edge 46d that has a value from a value range of, in particular, from 0.5 mm to 5 mm, preferably 1 mm to 3 mm, particularly preferably 1.5 m to 2.5 mm and very particularly preferably of 2 mm. The suction extraction openings 20d are arranged in such a manner that a longitudinal axis 90d of the suction extraction openings 20d has an angle 123d of, in particular, from 30° to 82°, preferably 50° to 75°, particularly preferably 64° to 68° and very particularly preferably 66°, with respect to an axis 125d of the main body 12d that passes through a mid-point 121d of the suction extraction openings 20d and along a maximum diameter 64d, 76d of the main body 12d, in particular of the contact region 16d. Preferably, the longitudinal axes 90d of the suction extraction openings 20d extend along major semi-axes of the ellipsoidal cross-sectional areas 92d of the suction extraction openings 20d. In particular, the suction extraction openings 20d are arranged, in respect of an arrangement relative to the circumferential direction 22d, like the inner grinding elements 36d. Along their longitudinal axes 90d, the suction extraction openings 20d each have a maximum longitudinal extent 86d that has a value from a value range of, in particular, from 10 mm to 50 mm, preferably 20° to 40 mm, particularly preferably 28 mm to 32 mm and very particularly preferably of 30 mm. In particular, the suction extraction openings 20d each individually have an ellipsoidal cross-sectional area 92d that corresponds to a value from a value range of, in particular, from 180 mm.sup.2 to 500 mm.sup.2, preferably 300 mm.sup.2 to 350 mm.sup.2, particularly preferably 320 mm.sup.2 to 340 mm.sup.2 and very particularly preferably of 330 mm.sup.2. The suction extraction openings 20d have, in particular at least substantially perpendicular to their longitudinal axes 90d, a maximum transverse extent 88d corresponding to a value from a value range of, in particular, from 10 mm to 22 mm, preferably 12 mm to 18 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm. The suction extraction openings 20d delimited by the main body 12d are arranged spaced apart from each other around the central axis 24d of the main body 12d, as viewed in the plane of main extent 17d of the main body 12d, over an angular range 96d of, in particular, from 30° to 80°, preferably 40° to 60°, particularly preferably 45° to 50° and very particularly preferably 47°. Preferably, an angular range 98d spanned by the individual suction extraction openings 20d extends around the central axis 24d over, in particular, from 30° to 60°, preferably 40° to 55°, particularly preferably 47° to 51° and very particularly preferably 49°.
[0047] FIG. 7 shows a fourth alternative design of a grinding tool 10e realized as a diamond cup wheel, in a plan view. The grinding tool 10e has a main body 12e comprising a connection region 14e and a contact region 16e. The contact region 16e surrounds the connection region 14e at least substantially completely as viewed in at least one plane of main extent 17e of the main body 12e. The grinding tool 10e comprises twelve grinding elements 36e, 40e, 126e arranged on the main body 12e. It is also conceivable, however, for the grinding tool 10e to have a number of grinding elements 36e, 40e, 126e that is other than twelve. The main body 12e delimits four suction extraction openings 20e which, as viewed along a circumferential direction 22e of the main body 12e, are in each case arranged at least partially between at least two, in particular in each case three, of the grinding elements 36e, 40e, 126e. It is also conceivable, however, for the main body 12e to delimit a number of suction extraction openings 20e that is other than four. The grinding tool 10e represented in FIG. 7 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10e represented in FIG. 7. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10e represented in FIG. 7 preferably has four groups 74e of grinding elements 36e, 40e, 126e that in each case are arranged between two of the suction extraction openings 20e. The grinding elements 36e, 40e, 126e are preferably realized in respect of their dimensions, in the plane of main extent 17e of the main body 12e, in a manner identical to the grinding elements 36a, 40a of the grinding tool 10a described in FIGS. 1 and 2. Each of the groups 74e of grinding elements 36e, 40e, 126e comprises an outer grinding element 40e, an inner grinding element 36e and a middle grinding element 126e. The middle grinding element 126e is arranged outside an outer edge region 42e of the contact region 16e and outside an inner edge region 38e of the contact region 16e on the contact region 16e, in particular on a contact surface 26e, of the main body 12e. In particular, along a maximum diameter 64e, 76e of the main body 12e, in particular of the contact region 16e, the middle grinding element 126e has a minimum distance 128e from an outer edge 46e of the main body 12e, in particular of the contact region 16e, that corresponds to a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 16 mm, particularly preferably 12 mm to 14 mm and very particularly preferably of 13 mm. The middle grinding element 126e is at least substantially perpendicular to a maximum diameter 64e, 76e of the main body 12e, in particular of the contact region 16e. The outer grinding element 40e, as viewed in the plane of main extent 17e of the main body 12e, is arranged spaced apart from an outer edge 46e of the main body 12e and/or of the contact region 16e within an outer edge region 42e of the contact region 16e, the outer edge region 42e, preferably as viewed in the plane of main extent 17e of the main body 12e, extending within a minimum radial distance 44e that has a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 16 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm, from the outer edge 46d of the grinding tool 10d, in particular of the contact region 16d. In particular, the outer grinding elements 40d have a maximum distance 122e from the outer edge 46e that corresponds to a value from a value range of, in particular, from 0.5 mm to 5 mm, preferably 1 mm to 4 mm, particularly preferably 1.5 mm to 2.5 mm and very particularly preferably of 2 mm. The grinding elements 36e, 40e, 126e of the individual groups 74e of grinding elements 36e, 40e, 126e are arranged in a mutually staggered manner, in particular the middle grinding element 126e of a group 74e being offset in the circumferential direction 22e with respect to the outer grinding element 40e of the group 74e, and the inner grinding element 36e of the group 74e being offset in the circumferential direction 22e with respect to the middle grinding element 126e. In particular, the middle grinding element 126e is arranged at least partially between the inner grinding element 36e and the outer grinding element 40e as viewed in the plane of main extent 17e of the main body 12e. The suction extraction openings 20e are each arranged in such a manner that a longitudinal axis 90e of one of the suction extraction openings 20e has an angle 123e of, in particular, from 30° to 82°, preferably 50° to 70°, particularly preferably 58° to 62° and very particularly preferably 60°, with respect to an axis 125e of the main body 12e that passes through a mid-point 121e of the suction extraction opening 20e and along a maximum diameter 64e, 76e of the main body 12e, in particular of the contact region 16e. The suction extraction openings 20e each have along their longitudinal axes 90e a maximum longitudinal extent 86e corresponding to a value from a value range of, in particular, from 10 mm to 50 mm, preferably 20 mm to 40 mm, more preferably 28 mm to 32 mm and very particularly preferably of 30 mm. In particular, the suction extraction openings 20e have an ellipsoidal cross-sectional area 92e that corresponds to a value from a value range of, in particular, from 180 mm.sup.2 to 500 mm.sup.2, preferably 250 mm.sup.2 to 360 mm.sup.2, particularly preferably 300 mm.sup.2 to 310 mm.sup.2 and very particularly preferably of 306 mm.sup.2. The suction extraction openings 20e have, in particular at least substantially perpendicular to their longitudinal axes 90e, a maximum transverse extent 88e that corresponds to a value from a value range of, in particular, from 5 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 12 mm to 14 mm and very particularly preferably of 13 mm.
[0048] FIG. 8 shows a fifth alternative design of a grinding tool 10f realized as a diamond cup wheel, in a plan view. The grinding tool 10f has a main body 12f comprising a connection region 14f and a contact region 16f. The contact region 16f surrounds the connection region 14f at least substantially completely as viewed in at least one plane of main extent 17f of the main body 12f. The grinding tool 10f has twelve grinding elements 36f, 40f, 126f arranged on the main body 12f. It is also conceivable, however, for the grinding tool 10f to have a number of grinding elements 36f, 40f, 126f that is other than twelve. The main body 12f delimits three suction extraction openings 20f which, as viewed along a circumferential direction 22f of the main body 12f, are in each case arranged at least partially between at least two, in particular in each case four, of the grinding elements 36f, 40f, 126f. It is also conceivable, however, for the main body 12f to delimit a number of suction extraction openings 20f that is other than three. The grinding tool 10f represented in FIG. 8 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference maybe made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10f represented in FIG. 8. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10f represented in FIG. 8 preferably has three groups 74f of grinding elements 36f, 40f, 126f, each group 74f comprising four grinding elements 36f, 40f, 126f. The grinding elements 36f, 40f, 126f and the suction extraction openings 20f are preferably realized in respect of their dimensions, in the plane of main extent 17f of the main body 12f, in a manner identical to the grinding elements 36a, 40a and to the suction extraction openings 20a of the grinding tool 10a described in FIGS. 1 and 2. Each group 74f of grinding elements 36f, 40f, 126f comprises two outer grinding elements 40f, one inner grinding element 36f and one middle grinding element 126f. In particular, the inner grinding element 36f and the middle grinding element 126f, as viewed in the plane of main extent 17f of the main body 12f, are arranged at least partially between the two outer grinding elements 40f along the circumferential direction 22f. The middle grinding element 126f is arranged, outside an outer edge region 42f of the contact region 16f and outside an inner edge region 38f of the contact region 16f, on the contact region 16f, in particular on a contact surface 26f, of the main body 12f. The middle grinding element 126f is at least substantially perpendicular to a maximum diameter 64f, 76f of the main body 12f, in particular of the contact region 16f. In particular, along a maximum diameter 64f, 76f of the main body 12f, in particular of the contact region 16f, the middle grinding element 126f has a minimum distance 128f from an outer edge 46f of the main body 12f, in particular of the contact region 16f, that corresponds to a value from a value range of, in particular, from 8 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 12 mm to 14 mm and very particularly preferably 13 mm. The inner grinding element 36f, as viewed in the plane of main extent 17f of the main body 12f, is arranged, along the circumferential direction 22f, between the middle grinding element 126f and one of the two outer grinding, elements 40f.
[0049] FIG. 9 shows a sixth alternative design of a diamond cup wheel grinding tool 10g, in a plan view. The grinding tool 10g has a main body 12g comprising a connection region 14g and a contact region 16g. The contact region 16g surrounds the connection region 14g at least substantially completely as viewed in at least one plane of main extent 17g of the main body 12g. The grinding tool 10g has fifteen grinding elements 36g, 40g arranged on the main body 12g. It is also conceivable, however, for the grinding tool 10g to have a number of grinding elements 36g, 40g that is other than fifteen. The main body 12g delimits five suction extraction openings 20g which, as viewed along a circumferential direction 22a, of the main body 12g, are in each case arranged at least partially between at least two, preferably in each case three, of the grinding elements 36g, 40g. It is also conceivable, however, for the main body 12g to delimit a number of suction extraction openings 20g that is other than five. The grinding tool 10g represented in FIG. 9 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference maybe made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10g represented in FIG. 9. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10g represented in FIG. 9 preferably has five groups 74g of grinding elements 36g, 40g that in each case are arranged between two of the five suction extraction openings 20g. In particular, each group 74g comprises three grinding elements 36g, 40g. The grinding elements 36g, 40g are preferably realized in respect of their dimensions, in the plane of main extent 17g of the main body 12g, in a manner identical to the grinding elements 36g, 40g and to the suction extraction openings 20a of the grinding tool 10a described FIGS. 1 and 2. Each group 74g individually comprises two outer grinding elements 40g and an inner grinding element 36g that is transverse to the circumferential direction 22g and to a maximum diameter 64g, 76g of the main body 12g, in particular of the contact region 16g. In particular, the inner grinding element 36g is arranged at least partially within an inner edge region 38g of the contact region 16g. The inner grinding element 36g has a longitudinal axis 119g which has an angle 120g of, in particular, from 30° to 70°, preferably 40° to 60°, more preferably 50° to 54° and very particularly preferably 52°, with respect to an axis 124g of the main body 12g that passes through a mid-point 117g of the inner grinding element 36g and along a maximum diameter 64g, 76g of the main body 12g, in particular of the contact region 16g. The suction extraction openings 20g delimited by the main body 12g have a longitudinal axis 90g that is at least substantially parallel to a maximum diameter 64g, 76g of the main body 12g, in particular of the contact region 16g. In particular, the suction extraction openings 20g extend from the inner edge region 38g, in particular an inner edge 50g of the contact region 16g that delimits the connection region 14g, at least substantially over a maximum radial extent 72g of the contact region 16g into the outer edge region 42g. Along their longitudinal axes 90g, the suction extraction openings 20g each have a maximum longitudinal extent 86g corresponding to a value from a value range of, in particular, from 10 mm to 40 mm, preferably 15 mm to 30 mm, more preferably 18 mm to 22 mm and very particularly preferably of 20 mm. In particular, the suction extraction openings 20g have an ellipsoidal cross-sectional area 92g that corresponds to a value from a value range of, in particular, from 180 mm.sup.2 to 400 mm.sup.2, preferably 200 mm.sup.2 to 300 mm.sup.2, particularly preferably 220 mm.sup.2 to 235 mm3 particularly preferably of 228 mm.sup.2.
[0050] The suction extraction openings 20g have, in particular at least substantially perpendicular to their longitudinal axes 90g, a maximum transverse extent 88g that corresponds to a value from a value range of, in particular, from 5 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 13.5 mm to 15.5 mm and very particularly preferably of 14.5 mm. The suction extraction openings 20g delimited by the main body 12g, as viewed in the plane of main extent 17g of the main body 12g, are arranged spaced apart from each other around the central axis 24g of the main body 12g over an angular range 96g of, in particular, from 30° to 60°, preferably 40° to 50°, particularly preferably 43° to 47° and very particularly preferably 45°. Preferably, an angular range 98g spanned by the individual suction extraction openings 20g extends around the central axis 24g over, in particular, from 10° to 40°, preferably 20° to 30°, more preferably 22° to 26° and very particularly preferably 24°. The suction extraction openings 20g delimited by the main body 12g are arranged in the contact region 16g and, as viewed in the plane of main extent 17g of the main body 12g, extend over at least 60%, preferably at least 70%, more preferably at least 80° and very particularly preferably 83%, of a maximum radial extent 72g of the contact region 16g, in particular from the inner edge 50g of the contact region 16g that delimits the connection region 14a to an outer edge 46g of the contact region 16g. In particular, a ratio of a total cross-sectional area of the suction extraction openings 20g, which is formed in particular from a sum of the cross-sectional areas 92g of the suction extraction openings 20g, to a total area of a contact surface 26g of the contact region 16g corresponds to a value from a value range of, in particular, from 0.15 to 0.5, preferably 0.3 to 0.4, particularly preferably 0.32 to 0.34 and very particularly preferably 0.33. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20g, to a total cross-sectional area of the main body 12g in the plane of main extent 17g of the main body 12g corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.25, particularly preferably 0.17 to 0.19 and very particularly preferably 0.18.
[0051] FIG. 10 shows a seventh alternative design of a grinding tool 10h realized as a diamond cup wheel, in a plan view. The grinding tool 10h has a main body 12h comprising a connection region 14h and a contact region 16h. The contact region 16h at least substantially completely surrounds the connection region 14h as viewed in at least one plane of main extent 17h of the main body 12h. The grinding tool 10h has fifteen grinding elements 36h, 40h, 130h, 132h arranged on the main body 12h. It is also conceivable, however, for the grinding tool 10h to have a number of grinding elements 36h, 40h, 130h, 132h that is other than fifteen. The main body 12h delimits three suction extraction openings 20h which, as viewed along a circumferential direction 22h of the main body 12h, are in each case arranged at least partially between at least two, preferably in each case five, of the grinding elements 36h, 40h, 130h, 132h. It is also conceivable, however, for the main body 12h to delimit a number of suction extraction openings 20h that is other than three. The grinding tool 10h represented in FIG. 10 is of a design that is at least substantially similar to the grinding tool 10a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10h represented in FIG. 10. In contrast to the grinding tool 10a described in the description of FIGS. 1 and 2, the grinding tool 10h represented in FIG. 10 preferably has three groups 74h of grinding elements 36h, 40h, 130h, 132h that in each case are arranged between two of the three suction extraction openings 20h. The grinding elements 36h, 40h, 130h, 132h and the suction extraction openings 20h are preferably realized in respect of their dimensions, in the plane of main extent 17h of the main body 12h, in a manner to the grinding elements 36a, 40a and to the suction extraction openings 20a of the grinding tool 10a realized as described in FIGS. 1 and 2. In particular, each group 74h comprises five grinding elements 36h, 40h, 130h, 132h. Each group 74h of grinding elements 36h, 40h, 130h, 132h individually comprises two outer grinding elements 40h, an inner grinding element 36h, a further outer grinding element 130h that is transverse to the circumferential direction 22h and a further inner grinding element 132h that is transverse to the circumferential direction 22h. The further inner grinding element 132h is in particular arranged at least partially within an inner edge region 38h of the contact region 16h. The further outer grinding element 130h is in particular arranged at least partially within an outer edge region 42h of the contact region 16h. The further inner grinding elements 132h each have a longitudinal axis 134h, which has an angle 120h of, in particular, from 40° to 82°, preferably 50° to 70°, particularly preferably 62° to 66° and very particularly preferably 64°, with respect to an axis 124h of the main body 12h that passes through a mid-point 117h of the further inner grinding element 132h and along a maximum diameter 64h, 76h of the main body 12h, in particular of the contact region 16h. The further outer grinding elements 130h each have a longitudinal axis 136h, which has an angle 142h of, in particular, from 40° to 82°, preferably 50° to 70°, particularly preferably 60° to 64° and very particularly preferably 62°, with respect to an axis 138h of the main body 12h that passes through a mid-point 140h of the further outer grinding element 130h and along a maximum diameter 64h, 76h of the main body 12h, in particular of the contact region 16h. The further inner grinding element 132h and the further outer grinding element 130h are arranged in such a manner that the longitudinal axes 134h, 136h of the further inner grinding element 132h and of the further outer grinding element 130h span an angle 144h of, in particular, from 8° to 50°, preferably 20° to 40°, particularly preferably 28° to 32° and very particularly preferably 30°. The inner grinding element 36h, the further inner grinding element 132h and the further outer grinding element 130h, as viewed in the plane of main extent 17h of the main body 12h, are arranged along the circumferential direction 22h at least partially between the two outer grinding elements 40h. The further outer grinding element 130h, as viewed along the plane of main extent 17h of the main body 12h, is arranged along the circumferential direction 22h at least substantially completely between the further inner grinding element 132h and one of the outer grinding elements 40h. In particular, the inner grinding elements 36h each have a longitudinal axis 148h, which has an angle 152h of, in particular, from 60° to 90°, preferably 70° to 68°, particularly preferably 82° to 86° and very particularly preferably 84°, with respect to an axis 150h of the main body 12h that passes through the mid-point 146h of the inner grinding element 130h and along a maximum diameter 64h, 76h of the main body 12h, in particular of the contact region 16h.
