Machine Tool and Method for Preparing a Machining of a Material-removing Rotary Tool

Abstract

At least one coordinate value (z1, z2, α1, α2) of a cutting body (35) can be acquired by means of an acquisition device (27) and transferred to the control device (25). This at least one coordinate value (z1, z2, α1, α2) of each cutting body (35) can be used for the rest of the method in the control device (25). This at least one coordinate value (z1, z2, α1, α2) which is determined on the basis of the at least one image (B) can be directly taken into account during the processing of the rotational tool (13). Alternatively or additionally, this at least one coordinate value (z1, z2, α1, α2) which is determined on the basis of the at least one image (B) can be used to determine at least one further coordinate value, in particular using a sensing device (29).

Claims

1. A machine tool (10) which is configured to machine a material-removing rotary tool (13) with use of at least one tool (12), which rotary tool comprises a tool body (34) extending along a tool longitudinal axis (L) and at least one cutting body (35) which is fastened to the tool body (34), said machine tool comprising: a detector (27) connected to a controller (25) for capturing detection data of the rotary tool (13) to identify a transition point between the tool body (34) and the at least one cutting body (35), and a clamping device (14) which is configured to clamp the rotary tool (13) for machining with the at least one tool (12), wherein the controller (25) is configured to control an axis arrangement (11) of the machine tool (10) so as to move the at least one tool (12) of the machine tool (10) and the clamping device (14) for the rotary tool (13) to be machined relative to one another and so as to position the at least one tool (12) of the machine tool (10) and the clamping device (14) for the rotary tool (13) to be machined relative to a machine coordinate system (M) of the machine tool (10), and wherein the controller (25) is configured to determine at least one coordinate value (z1, z2, α1, α2) for each of the at least one cutting body (35) arranged on the tool body (34) on the basis of the detection data, wherein the at least one coordinate value (z1, z2, α1, α2) describes an edge position of an edge (45, 46) of a cutting body (35) in relation to a reference coordinate system (K) of the rotary tool (13), wherein the controller (25) is configured to carry out machining of the at least one cutting body (35) by the at least one tool (12) under consideration of the at least one coordinate value (α1, α2) and/or to determine at least one further or more precise coordinate value (r, α1, α2, z1*, z2*) of the at least one cutting body (35) under consideration of the at least one coordinate value (z1, z2) obtained by the evaluation of the detection data.

2. The machine tool according to claim 1, wherein a main axis of the detector (27) is aligned with an end face of the rotary tool (13) during the capturing of the detection data.

3. The machine tool according to claim 1, further comprising a gripping device (36) configured to grip and position the rotary tool (13).

4. The machine tool according to claim 3, wherein the gripping device (36) is configured to position the rotary tool (13) in one or more orientations in a detection region (28) of the (27).

5. The machine tool according to claim 4, wherein the gripping device (36) is configured to arrange the rotary tool (13) in the clamping device (14) once the detection data has been captured, in such a way that a predefined correlation between the reference coordinate system (K) and the machine coordinate system (M) is maintained.

6. The machine tool according to claim 5, wherein the controller (25) is configured to bring the clamping device (14) with the clamped rotary tool (13) into a predefined rotary starting position about the tool longitudinal axis (L) at the start of machining by the tool (12).

7. The machine tool according to claim 1, further comprising a probe (29) that is movable relative to the rotary tool (13) by means of the axis arrangement (11).

8. The machine tool according to claim 7, wherein the probe (29) is configured to probe an edge (45, 46, 48, 49) and/or a surface (47) of the at least one cutting body (35) at least at one probe point (A1, A2, A3, A4, A5) contactlessly or in a contact-based manner.

9. The machine tool according to claim 8, wherein the controller (25) is configured to determine a plurality of probe points (A1, A2, A3, A4, A5) on the at least one cutting body (35) on the basis of the at least one coordinate value (z1, z2) determined based on the detection data.

10. The machine tool according to claim 9, wherein the controller (25) is configured to control the axis arrangement (11) such that the probe (29) probes the at least one cutting body (35) in succession at the plurality of probe points (A1, A2, A3, A4, A5), wherein the controller (25) is configured to determine one or more probe measurement values for each of the plurality of probe points (A1, A2, A3, A4, A5), the one or more probe measurement values describing a current position of the cutting body (25) at the plurality of probe points (A1, A2, A3, A4, A5) in a reference coordinate system (K).

11. The machine tool according to claim 8, wherein the controller (25) is configured to determine a more precise coordinate value (z1*, z2*) on the basis of the at least one coordinate value (z1, z2) which was determined on the basis of the detection data.

12. The machine tool according to claim 1, wherein the detector (27) comprises a camera (27a).

13. A method for preparing a machining of a material-removing rotary tool (13) which comprises a tool body (34) extending along a tool longitudinal axis (L) and has at least one cutting body (35) arranged on the tool body (34), said method comprising the following steps: positioning the rotary tool (13) in a detection area (28) of a detector (27), capturing detection data of the rotary tool (13) to identify a transition point between the tool body (34) and the at least one cutting body (35), determining at least one coordinate value (z1, z2, α1, α2) of each of the at least one cutting body (35) arranged on the tool body (34) on the basis of the detection data, wherein the at least one coordinate value (z1, z2) describes an edge position of an edge (45, 46) of the at least one cutting body (35) in relation to a machine coordinate system (M) of a machine tool (10), machining the at least one cutting body (35) by a tool (12) and/or determining at least one further coordinate value (r, α1, α2, z1*, z2*) of the at least one cutting body (25) with use of the at least one coordinate value (z1, z2, α1, α2) determined with reference to the detection data.

Description

[0034] Advantageous embodiments of the invention will become clear from the dependent claims, the description, and the drawings. Exemplary embodiments of the invention will be explained in detail hereinafter with reference to the accompanying drawings, in which:

[0035] FIG. 1 shows a schematic, block diagram-like illustration of a machine tool according to the invention and a rotary tool of a first tool type,

[0036] FIG. 1a shows a schematic illustration of a rotary tool of a second tool type and positioning thereof when detection data is captured,

[0037] FIG. 2 shows a schematic illustration of a cutting body and position thereof with orientation relative to a reference coordinate system, and

[0038] FIG. 3 shows an exemplary embodiment of a rotary tool to be machined in a perspective illustration,

[0039] FIG. 4 shows a schematic illustration of an exemplary embodiment of a rotary tool of a first tool type in a side view, and

[0040] FIG. 5 shows a plan view of an end face of the rotary tool from FIG. 4.

[0041] FIG. 1 shows schematically a machine tool 10 in a heavily simplified manner in the form of a block diagram, wherein the machine tool according to the example is a combined grinding and eroding machine. The machine tool 10 comprises an axis arrangement 11 comprising at least one and preferably more translatory and/or rotary machine axes. A tool 12 of the machine-tool and a rotary tool 13 to be machined can be moved and/or positioned relative to one another by means of the axis arrangement 11, so as to machine the rotary tool 13 by means of the tool 12 of the machine tool. The machine tool 10 comprises a clamping device 14 in order to clamp the rotary tool. During the machining, the rotary tool 13 remains clamped in the clamping device 14.

[0042] The tool 12 of the machine tool in the exemplary embodiment comprises a grinding tool 16 or an eroding tool 17. The type of tool is dependent on whether the machine is a grinding machine, an eroding machine, or a combined grinding and eroding machine. The tool 12 of the machine tool, and in accordance with the example the grinding tool 16 or the eroding tool 17, can be driveable by a machine spindle 18 about a spindle axis S. An eroding tool 17 can be driven in rotation about the spindle axis S during the machining of the rotary tool 13, or alternatively can remain still.

[0043] The axis arrangement 11 according to the example comprises a plurality of translatory and rotary axes, such that a relative movement between the clamping device 14 or a rotary tool 13 clamped therein and the tool 12 of the machine tool is possible in up to three linear degrees of freedom x, y, z and up to three rotary degrees of freedom rx, ry, rz. Which of the machine axes or the translatory or rotary degrees of freedom is designed here for the movement of the clamping device 14 or of the tool 12 of the machine tool is dependent on the specific design of the machine tool 10 and can vary.

[0044] In order to control the axis arrangement 11, the machine tool 10 comprises a control device 25. The control device 25 is connected to the axis arrangement 11 and a control interface 26 for communication therewith. The control interface 26 is configured to transmit inputs made by an operator to the control device 25 and to display information regarding the status of the machine tool 10 to the operator. For example, such information can concern current settings, the current operating state of the machine, the course of a machine programme, any errors, etc.

[0045] The machine tool 10 additionally comprises a detection device 27 operating contactlessly and formed in accordance with the example by camera 27a. Alternatively or additionally, the detection device 27 can also comprise a scanner or another detection unit operating contactlessly.

[0046] The detection device 27, and according to the example the camera 27a, can be configured to capture detection data, according to the example at least one image B of the rotary tool 13 arranged in a detection region 28 of the detection device 27 or the camera 27a and to transmit said data to the control device 25. The control device 25 is configured to control the camera 27a to capture at least one image B and to evaluate the image data of a received image B. To this end, the control device 25 performs corresponding image evaluation processes, for example in order to identify edges or surfaces of the rotary tool 13 and the recorded image B. The captured rotary tool 13 is displayed in the image in relation to a reference coordinate system K defined by the camera 27a.

[0047] The camera 27a is preferably arranged outside the working region of the machine tool 10. In the exemplary embodiment shown here the camera 27a is arranged in a fixed manner, for example externally on a cladding or a machine frame of the machine tool 10 or on a frame of a robot or a transfer device. The camera 27a can also be arranged movably or immovably at other positions outside the working region.

[0048] The machine tool 10 may optionally additionally comprise a probe device 29. The probe device 29 is configured to probe the rotary tool 13 at one or more probe points in a contact-based manner or contactlessly, so as to determine the exact position of the probe point relative to a machine coordinate system M of the machine tool (FIGS. 2 and 3). The probe device 29 may be advantageous when machining rotary tools of a certain tool type and might not be required for other tool types of rotary tool.

[0049] In the exemplary embodiment of the probe device 29 described here, a probe element 30, for example a probe stylus, is provided, with a probe body 31 arranged at the free end thereof. The probe body 31 for example may be formed by a probe ball. If the probe body 31 comes into contact with an object, for example the rotary tool 13, this contact is detected by the probe device 29 and a corresponding probe signal T, indicating the contact, is transmitted to the control device 25. To this end, the probe device 29 is connected to the control device 25 for communication therewith.

[0050] Alternatively to the presented probe device 29, a probe device operating contactlessly can also be used. The probe device 29 for example can operate optically and can detect objects in a detection region of the probe device, so as to determine the position thereof. A further possibility lies in the probe device 29 detecting the approach towards an object, without actually contacting said object, and determining the position of the object in this way.

[0051] As shown schematically in FIG. 1, the probe device 29 in the exemplary embodiment is located on the machine spindle 18 and can be moved and positioned relative to the clamping device 14 jointly with the machine spindle 18 and the tool 12 of the machine tool via a machine axis of the axis arrangement 11. Alternatively to this embodiment, it is also possible to arrange the probe device 29 in a stationary manner relative to a machine frame or a machine bed and to move the clamping device 14 relative to the probe device 29 for the probing of the rotary tool 13.

[0052] The rotary tool 13 has a tool body 34 which extends along a tool longitudinal axis L. The tool longitudinal axis L forms the axis of rotation of the rotary tool 13 when this is driven in rotation in order to machine a workpiece. One cutting body or, as in the shown exemplary embodiments, a plurality of cutting bodies 35 is/are arranged on or integrated in the tool body 34. Cutting edges are provided on the cutting bodies 35 or cutting bodies are to be exposed or machined.

[0053] FIGS. 4 and 5 show a rotary tool 13 of a first tool type 13a. In the case of this first tool type 13a the at least one cutting body 35 is integrated as an insert 50 into the tool body 34 in such a way that the edges of the at least one cutting body 35 do not form an edge that can be probed by contact by means of the probe device 29 if the rotary tool 13 is still an unmachined blank and has not yet been finished. FIGS. 4 and 5 show the blank (rotary tool 13 of the first tool type 13a), wherein the cutting edges have to be exposed by means of the machine tool 10 or have to be machined in accordance with the desired target geometry.

[0054] The blank of the rotary tool 13 of the first tool type 13a comprises at least one cutting body, and according to the example two cutting bodies 35, on the end face 13a, which form end-face cutting bodies 35s so to speak. In the case of the blank, which has not yet been machined to a finished state, these end-face cutting bodies 35s are integrated in the tool body 34 in such a way that they cannot be probed by means of the probe device 29 operating in a contact-based manner.

[0055] In a further exemplary embodiment of a rotary tool 13 of a second tool type 13b (FIGS. 1a and 3), the cutting bodies 35 are formed as cutting plates and are fastened externally to the tool body 34 at appropriate carrier surfaces, for example by way of an integrally bonded connection, in particular a soldered connection. The positioning of the cutting bodies 35 on the tool body 34 can therefore be subject to a relatively large tolerance, such that the actual positions and orientations of the cutting bodies 35 do not coincide exactly with target positions and target orientations. This tolerance hinders the machining of the cutting bodies 35 by the tool 12 of the machine-tool in order to produce a predefined target geometry at the cutting body 35. The target geometry to be produced is stored in the control device 25 or a memory connected thereto.

[0056] The machine tool 10 additionally comprises a gripping device 36. The gripping device 36 is configured to move and/or to position the rotary tool 13. The gripping device 36 can be embodied in many different ways. In the exemplary embodiment shown schematically in FIG. 1, the gripping device 36 has a gripping arm 37 with one or more joints and/or rotary axes. The gripping arm 37 is fastened at one end, for example to the machine frame or to the substrate on which the machine tool 10 is installed, or to a base or a pedestal of the gripping device 26. The opposite free end of the gripping arm 37 comprises a gripper 38, by means of which the gripping device 26 can grip, pick up and move an object. According to the example the gripper 38 can be configured to grip the tool body 34 in order to move and position the rotary tool 13.

[0057] According to example the gripping device 36 is configured to position the rotary tool 13 in the detection region 28 of the detection device 27 or the camera 27a such that the main axis of the detection device 27 or the optical axis H of the camera 27a is oriented substantially parallel or at right angles to the tool longitudinal axis L of the rotary tool 13. The angle between the optical axis H of the camera 27a and the tool longitudinal axis L can deviate up to 15 degrees or up to 10 degrees or up to 5 degrees from the parallel or right-angled orientation. It should be noted here that the optical axis H and the longitudinal axis L do not have to be congruent or do not have to intercept one another, but can also be arranged offset relative to one another. The offset should be kept as small as possible.

[0058] In the case of the rotary tool 13 of the first tool type 13a, which comprises at least one cutting body 35 integrated in the end face 13, at least one image B or precisely one image B with a view of the end face 13a is captured (FIG. 1). The tool coordinate system W belonging to the rotary tool 13 has a predefined orientation relative to the reference coordinate system K defined by the camera 27. The rotary tool 13 can then be inserted into the clamping device 14. In so doing, a predefined relative orientation between the tool coordinate system W and the reference coordinate system K is maintained. In the exemplary embodiment shown schematically in FIG. 1, the rotary tool 13 is tilted through 90° once an image B has been captured, such that the tool longitudinal axis L is then arranged along the axis of rotation D of the clamping device 14. Once the image B has been captured, until the rotary tool 13 has been clamped, the rotary tool 13 is in no case rotated about its tool longitudinal axis L or rotated by a predefined, known angle of rotation about its tool longitudinal axis L. A correlation between the reference coordinate system K and the tool coordinate system W is therefore known to the control device 25. According to example the camera 27a is arranged in a stationary manner relative to the machine coordinate system M, such that the association of the reference coordinate system K and the machine coordinate system M is known. The machine coordinate system M in one exemplary embodiment can also be identical to the reference coordinate system K.

[0059] In a modified embodiment the camera 27a can be moved by the gripping device 36. It is then possible for example to firstly clamp the rotary tool 13 and the clamping device 14 and to capture an image B in the clamped position by means of the camera 27. To this end, the camera 27a is positioned in a predefined relative orientation in relation to the machine coordinate system M, such that the position of the at least one cutting body 35 can then be determined on the basis of the image evaluation.

[0060] On the basis of the at least one image B, the position of the at least one cutting body 35 can be determined by an image processing method. During the subsequent machining or finishing of the rotary tool 13 of the first tool type 13a the position and orientation of the at least one cutting body 35 can be taken into consideration.

[0061] If, alternatively to the camera 27a, another detection device 27 is used, the captured detection data must enable identification or determination of one or more transition points between the at least one cutting body 35 and the tool body 36. If, for example, a light or other wave-emitting detection device 27 is used, the different reflection or absorption properties of the at least one cutting body 35 and the tool body 36 can be used to determine the transition points.

[0062] If construction data of the rotary tool 13 is provided in the control device 25, for example because the rotary tool 13 is to be machined by means of the machine tool 10 within the scope of production thereof, it is sufficient to determine the position of an edge and/or surface and/or corner of a cutting body 35. At the least, not all cutting body positions have to be determined. The construction data can be used as a priori knowledge in order to calculate, on the basis of the known position of one or more of the cutting bodies 35, the positions of the other cutting bodies 35.

[0063] In the case of the second tool type 13b shown in FIGS. 1a and 3, the cutting bodies 35 are formed by cutting plates which are arranged on the tool body 34 in an accessible manner and such that they can be probed in a contact-based manner. For example, the tool body 34 can have carrier surfaces in its circumferential region, with the cutting bodies 35 embodied as cutting plates fastened on said surfaces.

[0064] The at least one image B is captured when the rotary tool 13 of the second tool type 13b is at a right angle to the tool longitudinal axis L. Ideally, the tool longitudinal axis L and the optical axis H of the camera 27a intersect one another at right angles when the at least one image B is captured. It is possible to capture a series of images B and in so doing to move the rotary tool 13 in the plane at right angles to the optical axis of the camera 27a and/or to tilt the tool longitudinal axis L relative to the optical axis H of the camera 27a. From an image sequence of this kind the image B in which the offset between the tool longitudinal axis L and the optical axis H is the smallest and the angle between the longitudinal axis L and the optical axis H (projected into a common plane) which has the smallest deviation from a right angle can be selected by image recognition methods. At least one image or a sequence of images can be captured in different rotary positions of the rotary tool 13 about the tool longitudinal axis L. At least enough images B are preferably captured that each cutting body 35 of the rotary tool 13 is captured in at least one image B.

[0065] Parallel to the tool longitudinal axis L (here: z-direction), each cutting body 35 in the case of the second tool type 13b has two edges arranged at a distance from one another, specifically a first edge 45 and on the opposite side a second edge 46. A surface 47 of the cutting body 35, which preferably constitutes a flat surface, extends between the first edge 45 and the second edge 46. The first edge 45 and the second edge 46 are connected to one another in each case via an outer edge 48 and an inner edge 49. The surface 47 is delimited by the first edge 45, the second edge 46, the outer edge 48 and the inner edge 49. The surface 47 points away from a carrier surface of the tool body 34, on which the cutting body 35 is fastened by soldering or another integrally bonded connection. In the case of the exemplary embodiment of the rotary tool 13 shown in FIG. 3, a first coordinate value z1 and a second coordinate value z2 can be determined for each cutting body 35. The first coordinate value z1 describes the position of the first edge 45 in a z-direction parallel to the tool longitudinal axis L and the second coordinate value z2 describes the position of the second edge 46 in the z-direction parallel to the tool longitudinal axis L in relation to the reference coordinate system K. The approximate position of the first edge 45 and the second edge 46 is thus known by the detection of the at least one image B.

[0066] The rotary tool 13 is inserted into the clamping device 14 once the at least one image B has been captured. The cutting bodies 35 can then be formed.

[0067] With use of the first coordinate value z1 and the second coordinate value z2, which were determined by the image evaluation, the control device 25 can determine a plurality of probe points A1 to A3 within the surface 47. According to the example three probe points A1, A2, A3 can be provided in the surface 47 in order to be able to determine the orientation of the surface 47 relative to the machine coordinate system M (FIG. 2). In addition, it is also possible to probe a fourth probe point A4 at the first edge 45 and/or a fifth probe point A5 at the second edge 46 and/or a sixth probe point A6 on the outer edge 48 in order to determine the positions of the relevant edges 45 or 46 or 48 with a higher level of accuracy. A more precise first coordinate value z1*can be determined on the basis of the probing at the fourth probe point A4, and a more precise second coordinate value z2*can be determined by the probing at the fifth probe point A5.

[0068] In addition, a first angle value α1 and optionally a second angle coordinate value α2 can be determined on the basis of one or more probe points A1-A5 and specify the rotary angle of the surface 47 or the first edge 45 or the second edge 46 about a reference plane extending along the tool longitudinal axis L and spanned for example by the x-axis and the z-axis of the reference coordinate system K. If the surface 47 is oriented parallel to this reference plane, the determination of one angle coordinate value is sufficient. The surface 47 can also be inclined relative to this reference plane, such that two angle coordinate values α1, α2 can be determined in order to describe the position of the surface 47.

[0069] In addition, at least one radial coordinate value r, which describes the distance of at least one point on the outer axis 48 from the tool longitudinal axis L is determined. This for example can be the point at which the outer edge 48 and the first edge 45 form a corner point.

[0070] The exemplary embodiment of the first tool type 13a of the rotary tool 13 shown schematically in FIGS. 4 and 5 has two cutting bodies at the end face 13s of the rotary tool 13, which cutting bodies are arranged in corresponding recesses of the tool body 34 and can be referred to as end-face cutting bodies 35s. In addition, the rotary tool 13 has inserts 50, which are formed by cutting bodies 35 integrated into the tool body 34 in a manner running in a spiral and are referred to as veins. In the blank of the rotary tool 13 shown in FIGS. 4 and 5, the inserts 50 terminate with the lateral surface of the tool body 34, such that they cannot be detected by probing. Equally, the end-face cutting bodies 35s terminate with the end face and/or the lateral surface of the tool body 34, such that probing in a contact-based manner is not possible.

[0071] The rotary tool 13 shown in FIGS. 4 and 5 shall be provided with chip flutes, clearances, cutting edges, etc. by grinding and/or erosion, for example so as to produce a spiral drill with end-face cutting bodies 35s and circumferential-side cutting bodies. Here, the tool body 34 is preferably firstly machined by grinding, and the target geometry is then machined to a finish in the same clamped position by erosion. This has the advantage that very efficient production is achieved. Compared to erosion, a greater volume of material can be removed within the same period of time in the case of grinding. However, it must be ensured that the grinding tool 16 does not come into contact with the cutting bodies 35, since otherwise the grinding tool 16 would be damaged. It is therefore important to know the position of the cutting bodies 35.

[0072] The spiral angle, the cutting body 35 forming the inserts 50, and the position thereof relative to the end-face cutting bodies 35s is known in the control device 25, since this data is necessary for the machining of the rotary tool 13 during production thereof. The end-face cutting bodies 35s each have a first edge 45 and, in the circumferential direction about the tool longitudinal axis L and at a distance therefrom, a second edge 46. On the basis of the at least one image B a first angle coordinate value α1, which specifies the angular position of the first edge 45 relative to the reference plane (FIG. 5), can be determined in relation to a reference plane extending along the tool longitudinal axis L and according to the example spanned by the z-axis and the y-axis of the tool coordinate system W. Additionally or alternatively, a second angle coordinate value α2 can be determined, which specifies the angular position of the second edge 46 of the same end-face cutting body 35s relative to the reference plane. The first and/or the second angle coordinate value α1, α2 can be determined for one or more or all end-face cutting bodies 35s.

[0073] In order to determine the angle coordinate values α1, α2 of the end-face cutting bodies 35s, it is preferably sufficient to capture a single image B at the end face 13s of the rotary tool 13.

[0074] The rotary tool 13 is positioned preferably by means of the gripping device 36 in the detection region 28 of the camera 27a and at least one image or precisely one image is captured (FIG. 1). The position of the at least one cutting body relative to the reference coordinate system K defined by the camera 27a is thus firstly given. The rotary tool 13 of the first tool type 13a is then inserted into the clamping device 14 whilst maintaining a predefined relative orientation between the reference coordinate system K, the tool coordinate system W and the machine coordinate system M. The control device therefore knows the current rotary position of at least one of the edges 45, 46 of at least one of the end-face cutting bodies 35s in relation to the machine coordinate system M. The position of the veins or inserts 50 and/or other cutting bodies 35 provided according to the example is also given on this basis, for example from construction data, present in the control device, for producing the rotary tool 13. The control device 25 can control the clamping device 14 in order to bring the clamped rotary tool 13 into a starting rotary position for machining by means of the grinding tool 16. The clamping device 14 May preferably be driven in rotation via a rotary axis rz of the axis arrangement 11, wherein the tool longitudinal axis L of the clamped rotary tool 13 coincides with an axis of rotation D of the clamping device 14 (FIG. 1).

[0075] By controlling the rotary position of the clamping device 14 about the axis of rotation D before and/or during the machining of the rotary tool 13, it can be ensured that the grinding tool 16 does not come into contact with hard end-face cutting bodies 35s or circumferential-side cutting bodies (inserts 50). The material of the tool body 34 for forming chip flutes is preferably firstly removed as far as possible by the grinding tool 16. In the same clamped position, the rotary tool 13 is then further machined by means of the eroding tool 17 in order to achieve the desired target geometry. The cutting bodies 35 forming the inserts 50 are exposed and/or machined in the circumferential region by the eroding tool 17. The end-phase cutting bodies 35s can also be machined by means of the eroding tool 17 in order to produce the target geometry.

[0076] Different tool types 13a, 13b of rotary tools 13 can be produced or reworked with the aid of the invention. The cutting bodies 35, 35s can be arranged on carrier surfaces of the tool body 34 or can be integrated in the tool body 34 by sintering or another suitable method.

[0077] At least one coordinate value z1, z2, α1, α2 of a cutting body 35, 35s can be detected by means of the camera 27a and transmitted to the control device 25. This at least one coordinate value z1, z2, α1, α2 can be used in the control device 25 for the rest of the process. This coordinate value determined on the basis of the at least one image B either can be taken into consideration directly during the machining of the rotary tool 13, or, alternatively or additionally, this at least one coordinate value z1, z2, α1, α2 determined on the basis of the at least one image B can be used in order to determine at least one further coordinate value, in particular with use of a probe device 29. Cutting bodies 35 can be sampled merely in the case of rotary tools 13 in which the cutting bodies 35 have edges that can be probed sufficiently precisely by means of the probe device 29.

LIST OF REFERENCE SIGNS

[0078] 10 machine tool [0079] 11 axis arrangement [0080] 12 tool [0081] 13 rotary tool [0082] 13a first tool type [0083] 13b second tool type [0084] 13s end face of the rotary tool [0085] 14 clamping device [0086] 16 grinding device [0087] 17 eroding tool [0088] 18 machine spindle [0089] 25 control device [0090] 26 control interface [0091] 27 detection device [0092] 27a camera [0093] 28 detection region [0094] 29 keypad device [0095] 30 probe element [0096] 31 probe body [0097] 34 tool body [0098] 35 cutting body [0099] 35s end-face cutting body [0100] 36 gripping device [0101] 37 gripping arm [0102] 38 gripper [0103] 45 first edge [0104] 46 second edge [0105] 47 surface [0106] 48 outer edge [0107] 49 inner edge [0108] 50 insert [0109] α1 first angle value [0110] α2 second angle value [0111] A1 first probe point [0112] A2 second probe point [0113] A3 third probe point [0114] A4 fourth probe point [0115] A5 fifth probe point [0116] H optical axis [0117] K reference coordinate system [0118] L tool longitudinal axis [0119] M machine coordinate system [0120] r radial coordinate value [0121] S spindle axis [0122] T probe signal [0123] W tool coordinate system [0124] z1 first coordinate value [0125] z1* more precise first coordinate value [0126] z2 second coordinate value [0127] z2* more precise second coordinate value