Ski or snowboard

Abstract

The invention relates to a ski (2) or snowboard, having a top surface (20), a side wall surface (21), a covering (3) and at least one edge (1), comprising a body (10) having a base surface (11) and a side surface (12) which converge at an outer edge (13), wherein, in cross sections at right angles to a longitudinal axis, a side angle (ß) is enclosed between the side surface (12) and a vertical axis (Z), wherein the base surface (11) of the edge (1) abuts the covering (3) and wherein the side surface (12) of the edge (1) is adjacent to the side wall surface (21), wherein the side angle (ß) is smallest at a ski or snowboard centre in relation to the longitudinal axis and constantly increases in both directions along the longitudinal axis to a longitudinal position of the greatest front ski width up to a maximum front side angle and to a longitudinal position of the greatest rear ski width up to a maximum rear side angle depending on the polar moment of inertia of the ski or snowboard.

Description

[0001] SKI OR SNOWBOARD

[0002] TECHNICAL AREA

[0003] The present invention relates to a ski or a snowboard, a method for manufacturing such a ski or snowboard and a grinding machine with which such a ski or snowboard can be ground.

[0004] STATE OF THE ART

[0005] Skis or snowboards are known from the prior art in which a constant lateral angle is provided along the active edge length. Depending on the discipline, the lateral angle is larger or smaller, but always constant over the active edge length.

[0006] This has the disadvantage that, when cornering, the edge grip towards the ski tip and tail is increasingly reduced due to the twisting of the ski around its longitudinal axis.

[0007] DESCRIPTION OF THE INVENTION

[0008] One object of the present invention is to provide a ski or snowboard in which edge grip can be improved during turns or extreme traverses, such as during the downhill run in Kitzbühel, thereby reducing the risk of accidents for athletes and increasing their safety. This object is achieved by a ski or snowboard with the features of claim 1. Further

[0009] Design forms of the ski or snowboard, a method for manufacturing such a ski or snowboard, and a grinding machine with which such skis or snowboards can be manufactured, are defined by the features of further claims.

[0010] A ski or snowboard according to the invention extends in its intended position of use along a horizontal longitudinal axis, a horizontal transverse axis perpendicular to this longitudinal axis, and a vertical axis perpendicular to both of these. The ski or snowboard comprises a top surface, a sidewall surface, a base, and at least one edge. The edge comprises a body with a base surface and a side surface, which converge at an outer edge. In cross-sections perpendicular to the longitudinal axis, a lateral angle is enclosed between the side surface and the vertical axis. Preferably, two edges are provided, which are arranged opposite each other with respect to the transverse axis. The base surface of the edge abuts the base, and the side surface of the edge is arranged adjacent to the sidewall surface.

[0011] The lateral angle is smallest with respect to the longitudinal axis at the center of the ski or snowboard, or its zero point, and increases continuously from this center in both directions along the longitudinal axis up to a longitudinal position of the greatest front ski width, up to a maximum front lateral angle, and up to a longitudinal position of the greatest rear ski width, up to a maximum rear lateral angle, depending on the polar moment of inertia of the ski or snowboard. This dependence can be based on the polar moment of inertia at at least one front longitudinal position or at least one front and one rear longitudinal position. Preferably, it is based on the longitudinal position of the greatest front ski width and at the longitudinal position of the greatest rear ski width.The dependency can be based on the polar moment of inertia at several uniformly or unevenly distributed longitudinal positions from the zero point to the longitudinal position of the largest front ski width or to the longitudinal position of the largest front ski width and to the longitudinal position of the largest rear ski width.

[0012] This allows for optimized adjustment of the lateral angle to the conditions when cornering, thereby increasing edge grip and reducing slippage.

[0013] The length of the edge in the area between the widest front and widest rear ski widths is called the active edge length. The center of the ski or snowboard, or the zero point of the coordinate system, corresponds to the point of force application and is indicated by the manufacturer with a corresponding marking.

[0014] The increase in lateral angle can be polynomial, linear, exponential, logarithmic, or potential, or a combination thereof. That is, the increase in an edge segment can be as listed above. Individual lateral angles can be connected by a spline to achieve a smooth harmonic lateral angle profile along the longitudinal axis. The lateral angle can range from 0° to 15°, preferably from 1° to 10°. For example, a minimum lateral angle can be 3° and a maximum lateral angle 6°. The minimum lateral angle can be larger depending on the skill level of the skier. The minimum lateral angle can be larger or smaller depending on the slope conditions or the discipline being skied.

[0015] The center of a ski or snowboard is defined by a zero point with respect to the longitudinal axis. Alternatively, a central region is defined by a line segment with respect to the longitudinal axis, where the zero point lies within the central region. The zero point with respect to the longitudinal axis can be located at the geometric center of the edge or offset from it. Consequently, the lateral angle can be constant within the central region and can increase outside of it in the direction of the two free ends. Alternatively, the lateral angle can increase in the central region in the direction of the two free ends in a first way and outside of it in a second way that differs from the first.

[0016] In one version, the edge is formed as a single piece. Alternatively, the edge can be composed of several edge segments joined together.

[0017] In one embodiment, a base angle is enclosed between the base surface and the transverse axis in cross-sections perpendicular to the longitudinal axis. The base angle can be the same along the longitudinal axis, or it can vary at different positions along the longitudinal axis. The base angle can be smallest in the region central to the longitudinal axis and can increase from this central region in both directions along the longitudinal axis. The increase in the base angle can be continuous or discrete. The increase in the base angle can be aligned with the increase in the lateral angle. That is, the increase in the base angle can be equal to the increase in the lateral angle, or it can be proportional to it. Consequently, the increase in the base angle can be linear, exponential, polynomial, logarithmic, potential, or a combination thereof. The base angle can be from 0° to 5°, preferably from 0.5° to 1.2°.

[0018] In one embodiment, the ski or snowboard includes a binding which is arranged on the top surface. Alternatively, the ski or snowboard can include a binding and a plate, with the binding and plate arranged on the top surface.

[0019] In one design form, the central area of ​​the edge in the direction of the longitudinal axis coincides with an area of ​​the bond or with an area of ​​the plate.

[0020] The aforementioned embodiments of the ski or snowboard can be used in any combination within the scope of the claims, provided they do not contradict each other. A method according to the invention for manufacturing a ski or snowboard according to one of the preceding embodiments comprises the following steps:

[0021] - Determination of the lateral angle along the longitudinal axis depending on the associated rotation angles or polar moments of inertia and the defined lateral angle limits, wherein the lateral angle at a zero point is equal to the initial lateral angle, wherein the lateral angle at the longitudinal position of the greatest front ski width is equal to the maximum front lateral angle, wherein the lateral angle at the longitudinal position of the greatest rear ski width is equal to a maximum rear lateral angle, and wherein the lateral angle is smallest at the zero point and increases continuously from the zero point in both directions along the longitudinal axis depending on the previously assigned rotation angles or polar moments of inertia, wherein individual lateral angle values ​​can be connected by a spline to achieve a smooth harmonic lateral angle profile along the longitudinal axis;

[0022] - Data transmission of the specified lateral angles to a control unit of a grinding machine for skis or snowboards, for example using a STEP file; and

[0023] - Automatic lateral angle adjustment along the longitudinal axis by the grinding machine's control unit during edge grinding according to the specified lateral angle, for example, by a CNC-controlled device. In one implementation, the method further comprises the following steps:

[0024] - Providing a ski or snowboard;

[0025] - Dimensional measurement of the ski or snowboard including: o Measurement of the zero point or measurement of the zero point and measurement of a central area; o Measurement of the longitudinal position of the greatest front ski width; o Measurement of the longitudinal position of the greatest rear ski width;

[0026] - Determination of twist angles including: o Fixing the ski at the zero point; o Introducing a torsional moment about the longitudinal axis at the longitudinal position of the greatest front ski width; o Introducing a torsional moment about the longitudinal axis at the longitudinal position of the greatest rear ski width; o Measuring twist angles along the longitudinal axis from the zero point to the longitudinal position of the greatest front ski width; o Measuring twist angles along the longitudinal axis from the zero point to the longitudinal position of the greatest rear ski width;

[0027] - Data mapping encompasses the mapping of the recorded rotation angles to the positions along the longitudinal axis;

[0028] - Setting the lateral angle limits including: o Setting an initial lateral angle; o Setting a maximum forward lateral angle.

[0029] When determining the lateral angle along the longitudinal axis as a function of the associated rotation angles, the rotation angle at the origin 5(x=0) = 0, the rotation angle at the maximum front ski width 5(Xv) = 5v, and the rotation angle at the maximum rear ski width 5(Xh) = 5h. The rotation angle profile can be plotted along the longitudinal axis from the maximum rear rotation angle, through the origin, to the maximum front rotation angle. The lateral angle at the origin β(x=0) = β₀, at the maximum front ski width β(Xv) = β₁v, and at the maximum rear ski width β(Xv) = β₁v can be set according to the skier's preference. The following applies to the lateral angle profile in the front area:

[0030] For a smooth, harmonic side angle profile, a spline can be fitted through the determined side angles. This spline can be linear, quadratic, cubic, or of a higher degree. The same applies to determining the side angle in the rear section of the ski or snowboard, where the rear values ​​of the twist angles are inserted into the formula above, and the same applies to determining the side angle as a function of the polar moment of inertia, where the twist angles are replaced by the polar moments of inertia.

[0031] In one implementation, local polar moments of inertia along the longitudinal axis are determined from the rotation angles calculated along the longitudinal axis. Where: where M is the torsional moment, x is the position on the longitudinal axis (X ), G is the shear modulus and 5 (x ) is the local angle of twist.

[0032] Alternatively, the twist angle can be calculated using the formula above. Manufacturers of skis and snowboards usually possess the data required to determine the twist angle.

[0033] In one implementation, the maximum rear lateral angle is determined based on the twist angle and the specified maximum front lateral angle. Alternatively, defining the lateral angle limits includes specifying a maximum rear lateral angle.

[0034] In one implementation form, the dimension acquisition, the determination of the rotation angle and data assignment are carried out separately in time and space from the determination of the lateral angle and the data transmission, and the procedure comprises the following steps:

[0035] - Model input during dimension acquisition;

[0036] Integration of model input into data mapping;

[0037] - Data storage of the assigned data on a storage medium before the lateral angle determination;

[0038] - Providing the stored data before determining the lateral angle; and

[0039] - Model selection prior to determining the lateral angle. The aforementioned implementation forms of the method can be carried out in any combination within the scope of the claims, provided they do not contradict each other.

[0040] A grinding machine for skis or snowboards according to the invention, based on one of the preceding embodiments, comprises an input unit, a control unit, and a lateral angle adjustment unit on which an abrasive for grinding the edges is arranged. The lateral angle adjustment unit allows the control unit to automatically adjust the desired lateral angles along the longitudinal axis of the edge during grinding. The abrasive can be a grinding belt, a grinding wheel, a cup wheel, or a grinding pin.

[0041] BRIEF DESCRIPTION OF THE FIGURES

[0042] Exemplary embodiments of the present invention are explained in more detail below with reference to the figures. These serve only for illustration and are not to be interpreted restrictively. They show

[0043] Fig. 1 a schematic sectional view through the

[0044] Edge of a ski or snowboard;

[0045] Fig. 2 shows a side view of a ski;

[0046] Fig. 3 is a top view of the ski of Fig. 2;

[0047] Fig. 4 shows a graph of the twist angle profile of a ski along its longitudinal axis; Fig. 5 shows a graph of a lateral angle profile according to the invention based on the twist angle profile of Fig. 4;

[0048] Fig. 6A shows a graphic of an alternative invention according to the lateral angle profile;

[0049] Fig. 6B-C Graphics of alternative non-inventive lateral angle profiles;

[0050] Fig. 7 A flowchart of a method for producing an edge according to the invention; and

[0051] Fig. 8 An alternative flow scheme in which the determination of the lateral angle limits does not take place immediately after the data assignment.

[0052] DETAILED DESCRIPTION OF THE INVENTION

[0053] Fig. 1 shows a schematic sectional view through the edge 1 of a ski 2 or snowboard. The ski 2 extends along a horizontal longitudinal axis X, a horizontal transverse axis Y perpendicular to this axis, and a vertical axis Z perpendicular to both of these axes. The ski 2 comprises a top surface 20 and a sidewall surface 21. A base 3 is arranged opposite the top surface 20 with respect to the vertical axis Z. The edge 1 is located in the corner region between the sidewall surface 21 and the base 3. The edge 1 comprises a rod-shaped body 10 that extends substantially along the longitudinal axis X. The edge 1 includes a base surface 11, which adjoins the base 3, and a side surface 12, which is adjacent to the sidewall surface 21. The base surface 11 and the side surface 12 meet at an outer edge 13.On a side of the side surface 12 opposite the transverse axis Y, a tab 14 is provided, which is formed integrally with the body 10 and projects in the direction of the vertical axis Z above the base 3 into an interior of the ski 2. A base angle α is enclosed between the base surface 11 and the transverse axis Y, or between a base surface 30 and the base surface 30. A side angle β is enclosed between the side surface 12 and the vertical axis Z.

[0054] Fig. 2 shows a side view of a ski 2 with a binding 4 and a plate 40, and Fig. 3 shows a top view of a ski 2 with a plate 40. The coordinate system of the ski 2 has its origin, or zero point X0, at the center of the ski. The ski 2 extends from zero point X0 in a positive direction towards a tip and in a negative direction towards a tail. The active edge is defined by the longitudinal position of the largest leading ski width Xv in the direction of the transverse axis Y and by the longitudinal position of the largest trailing ski width Xh in the direction of the transverse axis Y.

[0055] Fig. 4 shows a graph of the twist angle profile 5(x) about the longitudinal axis X of a ski along this longitudinal axis X. At the origin X0, the twist angle 5 is zero 5(x=0) = 0. Towards the front and towards the rear, the twist angle 5 increases. Due to the greater distance between the origin X0 and the longitudinal position of the greatest front ski width Xv than between the origin X0 and the longitudinal position of the greatest rear ski width Xh, a locally larger twist angle results at the front than at the rear 5(Xv) > 5(Xh). More generally, the torsion or twist angle 5 can be determined using the following formula:

[0056] Where M is the torsional moment, x the position on the longitudinal axis X, G the shear modulus, and Ip the polar moment of inertia. The individual values ​​of the torsional angles are connected by a spline to obtain a smooth harmonic torsional angle profile.

[0057] Fig. 5 shows a graph of a lateral angle profile β(x) according to the invention, based on the twist angle profile 5(x) of Fig. 4. At the origin XO, an initial lateral angle βO is defined, and at the longitudinal position of the greatest front ski width Xv, a maximum front lateral angle βv is defined. The maximum rear lateral angle βh can also be defined, or it can be determined from the maximum front lateral angle βv and the lateral angle profile β(x) in the positive direction of the longitudinal axis X. The following applies to the determination of the lateral angle profile β(x) as a function of the torsion or twist angle profile 5(x):

[0058] The depicted lateral angle profile β(x) shows a continuous increase of the lateral angle β from the origin X0 in both directions along the longitudinal axis X. To achieve a smooth harmonic lateral angle profile, the individual values ​​of the lateral angles are connected by a spline. The smooth and harmonic lateral angle profile extends from the maximum front ski width Xv, through the origin X0, to the maximum rear ski width Xh.

[0059] Fig. 6A shows a lateral angle profile β(X) with a continuously linear increase of the lateral angle β from the origin X0 in both directions along the longitudinal axis X. In this case, the lateral angle profile along the longitudinal axis is determined only by the initial lateral angle βO, the maximum forward lateral angle βv, and the maximum rear lateral angle βh. The dashed-dotted line indicates that non-linearly increasing profiles are also possible computationally.

[0060] Fig. 6B shows a non-inventive lateral angle profile β(X) with a constant initial lateral angle βO in a central region Xm around the origin X0 and a continuously linear increase of the lateral angle β from the central region Xm in both directions along the longitudinal axis X.

[0061] Fig. 6C shows a non-inventive lateral angle profile β(X) with a constant initial lateral angle βO in a central region Xm around the origin X0 and a discrete step-like increase of the lateral angle β from the central region Xm in both directions along the longitudinal axis X.

[0062] Fig. 7 shows a flowchart of a process for

[0063] Production of an edge 1 according to the invention. The method comprises providing a ski 2 or snowboard and optionally a model input 50. Subsequently, a dimension acquisition 5 is carried out, which includes the acquisition of a zero point X0, optionally the acquisition of a central area Xm, the acquisition of a longitudinal position of the greatest front ski width Xv, and optionally the acquisition of a longitudinal position of the greatest rear ski width Xh. Subsequently, a twist angle determination 51 is performed, which, through a data assignment 52, results in a twist angle profile 5 (X) along the longitudinal axis X, which result can optionally be assigned to a model. The definition of the side angle limits 6 comprises defining an initial side angle βO, a maximum front side angle βv, and optionally a maximum rear side angle βh, and is usually carried out at an input unit 90 of a grinding machine 9.Subsequently, a lateral angle determination 7 is performed based on the definition of the lateral angle limit 6 and the twist angle determination 51, followed by data transmission 70. These are typically carried out by a control unit 91 of the grinding machine 9. Then, in a lateral angle adjustment unit 92, the control unit 91 performs an automatic lateral angle adjustment 8 along the longitudinal axis X during the grinding of the edge 1 according to the determined lateral angle profile β(X).

[0064] Figure 8 shows a flowchart of an alternative method for producing an edge 1 according to the invention. In contrast to the flowchart of Figure 7, the determination of the side angle limits 6 does not take place immediately after the data assignment 52. For example, the dimension acquisition 5, the twist angle determination 51, and the data assignment 52 can be carried out by a manufacturer of skis and snowboards, while the determination of the side angle limits 6, the side angle determination 7, the data transmission 70, and the side angle adjustment 8 can be carried out by an edge grinder. In this case, model input 50 is mandatory during dimension acquisition 5. After the data assignment 52, data is stored 53. The stored data must be made available again before a side angle determination 7. A model selection 54 is mandatory when determining the side angle limits 6.

[0065] REFERENCE MARK LIST

[0066] 1 edge 9 grinding machine

[0067] 10 bodies 90 input unit

[0068] 11 Base area 91 Control unit

[0069] 12 Side surface 92 Side angles¬

[0070] 13 Outer edge adjustment unit

[0071] 14 tab

[0072] 2 Skis X Longitudinal axis

[0073] 20 Cover surface X0 Zero point

[0074] 21 Side wall area Xm Central area

[0075] 3. Cover Xv Longitudinal position of the

[0076] 30 largest front surface area

[0077] 4 Binding Ski width

[0078] 40 Plate Xh Longitudinal position of the

[0079] 5 Dimension measurement largest rear

[0080] 50 Model input Ski width

[0081] 51 Determination of the rotation angle Y Transverse axis Z Vertical axis

[0082] 52 Data assignment

[0083] 53 Data storage a base angle

[0084] 54 Model selection ß Side angle

[0085] 6 Determining β O Initial lateral angle

[0086] Side angle max. front limits side angle

[0087] 7 Side angle βh max. rear determination of side angle

[0088] 70 Data transmission 5 Rotation-

[0089] 8 Side angle / torsion angle settings

Claims

PATENT CLAIMS 1. A ski (2) or snowboard, which in its intended position of use extends along a horizontal longitudinal axis (X), a horizontal transverse axis (Y) perpendicular to this, and a vertical axis (Z) perpendicular to these two, with a top surface (20), a side wall surface (21), a base (3), and at least one edge (1), comprising a body (10) with a base surface (11) and a side surface (12) which meet at an outer edge (13), wherein in cross-sections a lateral angle (β) is enclosed perpendicular to the longitudinal axis (X) between the side surface (12) and the vertical axis (Z), wherein the base surface (11) of the edge (1) adjoins the base (3) and wherein the side surface (12) of the edge (1) is arranged adjacent to the side wall surface (21), characterized in that the lateral angle (β) is smallest at a ski or snowboard center (X0) with respect to the longitudinal axis (X) and increases continuously from the ski or snowboard center (X0) in both directions along the longitudinal axis (X) up to a longitudinal position of a maximum front ski width (Xv) up to a maximum front lateral angle (βv) and up to a longitudinal position of a maximum rear ski width (Xh) up to a maximum rear lateral angle (βh) depending on the polar moment of inertia of the ski or snowboard.

2. The ski (2) or the snowboard according to claim 1, wherein the increase of the lateral angle (β) is polynomial, linear, exponential, logarithmic, potential, or a piecewise combination thereof.

3. The ski (2) or the snowboard according to claim 1 or 2, wherein the edge (1) is formed in one piece or wherein the edge (1) is composed of several edge sections joined together.

4. The ski (2) or the snowboard according to one of claims 1 to 3, wherein in cross-sections perpendicular to the longitudinal axis (X) a base angle (a) is enclosed between the base surface (11) and the transverse axis (Y), wherein the base angle (a) is the same along the longitudinal axis (X) or wherein the base angle (a) is different at different positions along the longitudinal axis (X).

5. The ski (2) or snowboard according to any one of claims 1 to 4, comprising a binding (4) arranged on the top surface (20) or comprising a binding (4) and a plate (40), wherein the binding (4) is arranged with the plate (40) on the top surface (20).

6. The ski (2) or snowboard according to claim 5, wherein the ski or snowboard center (X0) lies in the direction of the longitudinal axis (X) within a region of the binding (4) or within a region of the plate (40).

7. A method for manufacturing a ski (2) or snowboard according to any one of claims 1 to 6, comprising the steps: Side angle determination (7) along a longitudinal axis (X) of the ski (2) or snowboard depending on previously assigned twist angles and previously defined side angle limits or depending on previously assigned polar moments of inertia and previously defined side angle limits, wherein the side angle (β) at a zero point (X0) is equal to an initial side angle (βO), wherein the side angle (β) at the longitudinal position of the largest front ski width (Xv) is equal to a maximum front side angle (βv), wherein the side angle (β) at the longitudinal position of the largest rear ski width (Xh) is equal to a maximum rear side angle (βh), and wherein the side angle (β) is smallest at the zero point (X0) and increases continuously from the zero point (X0) in both directions along the longitudinal axis (X) depending on the previously assigned twist angles or polar moments of inertia; Data transmission (70) of the determined lateral angles to a control unit (91) of a grinding machine (9) for skis (2) or snowboards; and automatic lateral angle adjustment (8) along the longitudinal axis (X) by the control unit (91) of the grinding machine (9) during the grinding of the edge (1) according to the determined lateral angles.

8. The method of claim 7, comprising the steps of: Providing a ski (2) or snowboard; Dimensional measurement (5) of the ski (2) or snowboard along the longitudinal axis (X) comprising: o Measurement of the zero point (XO) or measurement of the zero point (XO) and a central area (Xm); o Measurement of a longitudinal position of the greatest front ski width (Xv); o Measurement of a longitudinal position of the greatest rear ski width (Xh); Determination of twist angles (51) comprising: o fixing the ski (2) at the zero point (XO); o introducing a torsional moment about the longitudinal axis (X) at the longitudinal position of the greatest front ski width (Xv); o introducing a torsional moment about the longitudinal axis (X) at the longitudinal position of the greatest rear ski width (Xh); o measuring twist angles (5) along the longitudinal axis (X) from the zero point (XO) to the longitudinal position of the greatest front ski width (Xv); o measuring twist angles (5) along the longitudinal axis (X) from the zero point (XO) to the longitudinal position of the greatest rear ski width (Xh); Data mapping (52) comprising mapping the detected rotation angles (5) to the positions along the longitudinal axis (X) ; and determination of the lateral angle limits (6) comprising: o determining an initial lateral angle (ßO) ; o determining a maximum front lateral angle (ßv) .

9. The method according to claim 7 or 8, wherein local polar moments of inertia along the longitudinal axis (X) are determined from the rotation angles (5) determined along the longitudinal axis (X), wherein: where M is the torsional moment, x is the position on the longitudinal axis (X), G is the shear modulus and Ip is the polar moment of inertia.

10. The method according to any one of claims 7 to 9, wherein the maximum rear lateral angle (βh) is determined based on the twist angle determination (51) and the determined maximum front lateral angle (βv), or wherein the determination of the lateral angle limits (6) comprises determining the maximum rear lateral angle (βh).

11. The method according to any one of claims 7 to 10, wherein the dimension acquisition (5), the rotation angle determination (51) and data assignment (52) are carried out separately in time and space from the lateral angle determination (7) and the data transmission (8), and the method comprises the steps: Model input (50) during dimension acquisition (5) ; Integration of the model input (50) into the data mapping Data storage (53) of the assigned data on a Storage medium before lateral angle determination (7) ; Providing the stored data before the Side angle determination (7) ; and Model selection (54) before determining the lateral angle (7) .

12. A grinding machine (9) for skis (2) or snowboards according to any one of claims 1 to 11, comprising an input unit (90), a control unit (91) which can determine the lateral angle (7) along the longitudinal axis (X) depending on the associated rotation angles and the defined lateral angle limits according to claim 7, and a lateral angle adjustment unit (92) on which an abrasive for grinding the edges (1) is arranged, with which lateral angle adjustment unit (92) the different lateral angles (β) to be achieved on the edge (1) along the longitudinal axis (X) can be automatically adjusted by the control unit (91) during grinding.

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