Tool, cutting device for a tool and method for producing a tool

Abstract

There is described a tool (2) comprising a holder (4) comprising at least one cutting device (6, 6a, 6b) for machining a workpiece wherein the holder (4) comprises at least one blade seat (8) in which the cutting device (6, 6a, 6b) is mounted, wherein the holder (4) comprises a first medium channel (28) for conducting a coolant and / or lubricant (M), the first medium channel (28) comprises a first outlet opening (32) which is arranged at least partially in the insert holder (8), and the cutting device (6, 6a, 6b) comprises a second medium channel (34) which is arranged at least partially in the insert holder (8). The cutting device (6, 6a, 6b) has a second media channel (28) connected to the first media channel (28) and comprising at least one second outlet opening (38) arranged in a lateral surface (22, 24) of the cutting device (6, 6a, 6b). A cutting device (6, 6a, 6b) and a method for manufacturing a tool (2) are also described.

Description

Field of the Invention

[0001] The present invention relates to a tool, in particular a rotary tool, a cutting device for such a tool, and a method for manufacturing such a tool, in particular its holder. Background Art

[0002] Tools can be designed to be modular and then include an interchangeable cutting device mounted on a tool holder. The cutting device is typically plate-shaped, such that the corresponding mounting position on the holder is referred to as a blade seat. The cutting device can be a simple cutting blade (or just a "blade") or a combination of such a cutting blade including a shim, which is also typically plate-shaped.

[0003] When using a tool including an interchangeable cutting device, it is desirable to supply coolant and / or lubricant according to the application. For this purpose, corresponding media channels are incorporated, for example, into the holder and lead to the vicinity of the cutting device in order to discharge the coolant and / or lubricant at this location.

[0004] Reference is made to US 8 439 608 B2. Summary of the Invention

[0005] In view of this background, the object of the present invention is to improve the supply of coolant and / or lubricant to the cutting device in a tool using an interchangeable cutting device. In terms of design, the tool itself should be as simple as possible. For this purpose, a corresponding improved tool, an improved cutting device for this purpose, and a method for manufacturing such a tool are described.

[0006] The object is achieved by a tool having the features according to claim 1, a cutting device having the features according to claim 12, and a method having the features according to claim 13. Advantageous embodiments, further developments, and variants are the subject of the dependent claims. The information provided regarding the tool also applies to the cutting device and the method, and vice versa.

[0007] The tool includes a holder and at least one cutting device for machining a workpiece. Typically, the tool includes a plurality of cutting devices, in particular cutting devices of the same type, which are distributed regularly or irregularly in one or more planes along the holder. The holder includes at least one blade seat in which the cutting device is mounted. In particular, the tool includes exactly one blade seat for each cutting device. In a suitable embodiment, the holder includes a base body and one or more arms (also referred to as tooth seats). The base body is typically cylindrical and, in particular, solid, and the arms each form a cantilever in the radial direction on the base body. Then one or more blade seats are integrated into each arm.

[0008] The tool is preferably a rotary tool, which means that during the operation for machining a workpiece, the holder and thus the cutting device rotate about a longitudinal axis (also: axis of rotation). The longitudinal axis extends in the axial direction; perpendicular thereto is the radial direction. The tool rotates about the longitudinal axis in the circumferential direction (tangential direction). The tool is preferably a milling and / or drilling tool, and this is assumed hereinafter without loss of generality. In principle, the following explanations also apply accordingly to other tools, such as cutting tools, and the invention described herein can also be applied to these tools.

[0009] The blade seat includes a base, which preferably points in the circumferential direction and is then also referred to as the tangential surface. This is assumed hereinafter without loss of generality. Alternatively, the base points in a different direction, for example in the radial direction, such that the cutting device is then tangentially arranged in the blade seat. Optionally, the blade seat includes one or more lateral surfaces that extend laterally from the base and, for example, generally point in the axial direction or the radial direction or a combination thereof. The cutting device is generally plate-shaped and includes a rear side that abuts the base. Due to the final alignment, this side is also referred to as the tangential surface. In addition, the cutting device includes a front side opposite the rear side. Furthermore, depending on the design, the cutting device includes one or more lateral surfaces that connect the front side to the rear side. For example, a square cutting device includes four lateral surfaces, specifically two radial surfaces (pointing in the radial direction) and two axial surfaces (pointing in the axial direction).

[0010] The cutting device includes at least one (usually multiple) cutting edge that abuts the front side. The lateral surface is connected to the cutting edge and is thus also a clearance surface, which means that during machining, each lateral surface forms a clearance angle with the workpiece. However, embodiments are also conceivable in which one lateral surface is not or only partially bounded by the cutting edge and thus does not or only partially represent a clearance surface.

[0011] The holder includes an initial medium channel for conducting coolant and / or lubricant. The coolant and / or lubricant are also simply referred to as "medium". The medium is usually a liquid. The first medium channel includes (at least or exactly) one first outlet opening, which is at least partially arranged in the blade seat. If there are multiple blade seats, the tool includes a corresponding number of first medium channels, and each of these first medium channels leads to one of the blade seats in the blade seat. The first medium channel is entirely located within the holder. For example, the first outlet opening is rounded or oval. The first outlet opening is particularly completely covered by the cutting device. The first medium channel particularly extends through both the base body and one of the arms of the holder and extends to the blade seat integrated therein.

[0012] The cutting device then comprises a second medium channel which is connected to the first medium channel and which comprises at least one second outlet opening arranged in the lateral surface of the cutting device, in particular in the clearance surface. The second medium channel also comprises a second inlet opening through which the medium enters the second medium channel from the first outlet opening of the first medium channel. The first outlet opening and the second inlet opening are in particular directly adjacent to one another, but this is not absolutely necessary. The second outlet opening can basically be of any desired shape, but a circular or oval shape is particularly suitable.

[0013] The tool then comprises a total of two medium channels, specifically the first medium channel of the holder and the second medium channel of the cutting device. These two medium channels are fluidly connected to one another, which means that the medium first flows through the first medium channel, then is transferred from there to the second medium channel and finally exits via the lateral surface of the cutting device. In particular, the tool comprises such a pair of first medium channels and second medium channels for each individual cutting device.

[0014] The terms "first" and "second" in relation to the inlet opening and the outlet opening are used in this context to indicate whether the respective inlet opening or outlet opening belongs to the first medium channel or the second medium channel and should not be understood as numbers, which means that although the second medium channel comprises a second outlet opening, it does not comprise a first outlet opening.

[0015] The cutting device is preferably rotationally symmetric (i.e. designed as an indexable cutting device), in particular with respect to the cutting edge of the cutting device, but especially rotationally symmetric with respect to the design of the second medium channel such that it is characterized by the same rotational symmetry as the arrangement of the cutting edge.

[0016] An important aspect of the invention is in particular that the cutting device itself comprises a medium channel (specifically the second medium channel) through which the medium is conducted and then discharged at a suitable point. In this case, the suitable location is the lateral surface of the cutting device, which is preferably even the clearance surface of the cutting device. Thus, the discharge of the medium takes place in particular in the axial direction and / or the radial direction as compared to discharge in the circumferential direction (i.e. in the tangential direction). The lateral surface is located below the cutting edge of the cutting device which travels in front of the clearance surface during operation. By means of the invention, then, the discharge of the medium on the clearance surface of the cutting device is achieved. At this point, i.e. the discharge of the medium on the lateral surface, is not specifically described in the initially cited US 8 439 608 B2 and is particularly advantageous for rotary tools for which other challenges arise when supplying coolant and / or lubricant as compared to stationary tools, such as cutting tools.

[0017] Furthermore, compared to the holder, the design of the cutting device is particularly simple and opens up a wide range of possible designs, enabling the medium to be conducted and discharged as desired. Although the first medium channel for the tool is firmly defined by the holder, the second medium channel can be changed accordingly and adapted to the respective application by simply replacing the cutting device. Simply select the appropriate cutting device, and then the cutting device discharges the medium at the desired location through the correspondingly designed second medium channel.

[0018] In particular, there are two preferred variants for the cutting device, which will be explained in more detail below.

[0019] In the first preferred variant, the cutting device is made of a single piece (i.e., integral), specifically made as a cutting blade (or simply referred to as "blade"). Thus, the cutting device only includes a single cutting blade. This cutting blade is directly mounted in the blade seat and includes a rear side, through which the cutting blade abuts against the base of the blade seat. Optionally, the cutting blade also abuts against the lateral surface of the blade seat through at least one lateral surface.

[0020] However, in the second preferred variant, the cutting device is made of multiple parts (specifically a combination of a cutting blade and a spacer). The spacer is arranged between the cutting blade and the base of the blade seat. The spacer separates the cutting blade from the base of the blade seat, specifically by the height of the spacer. In this second embodiment, the second medium channel extends through the spacer. In this case, it is preferred that the second medium channel is completely formed in the spacer and / or the cutting blade has no design of any medium channel. However, other designs in which the second medium channel partially extends through the spacer and partially extends through the cutting blade are also possible and equally suitable.

[0021] The spacer is completely covered by the cutting blade. Preferably, the spacer is shaped the same as the rear side of the cutting blade.

[0022] In a particularly advantageous embodiment, the second medium channel is formed by means of a groove extending along the rear side of the cutting blade. In this scenario, it is particularly important that the groove is open, and the second medium channel is only formed as a closed channel when combined with the blade seat (however, the second medium channel itself remains open at the second inlet opening and the second outlet opening). Thus, the second medium channel includes a wall, which is formed on the one hand by the groove of the cutting blade and on the other hand by the blade seat. This type of groove is particularly easy to manufacture and can be simply formed, for example, by a corresponding die or mold during the manufacture of the cutting blade. There is no need to drill separate holes after the cutting blade is formed; the groove is directly formed when the cutting blade is formed. Therefore, the cutting blade is preferably a pressed part or a cast part.

[0023] In principle, the groove can have any desired shape, as long as it leads from the first outlet opening of the first medium channel to the lateral surface of the cutting device and is at least partially covered by the blade holder. For example, the groove has an S-shape. Preferably, the groove is rotationally symmetric, corresponding to the rotational symmetry of the cutting device.

[0024] The previously described embodiment (in which the second medium channel is formed by means of a groove on the rear side of the cutting blade) can also be combined with a spacer, which then completes the wall of the second medium channel instead of the blade holder. Alternatively, the front side of the spacer itself includes a second groove (specifically complementary to the groove of the cutting blade) for this purpose, which second groove simply follows, for example, the same route as the groove of the cutting blade. The concept of the groove on the rear side can also be advantageously applied to the spacer, such that it includes a rear side, regardless of the design of the cutting blade, in which the second medium channel is formed by means of the groove. Thus, a preferred embodiment is then achieved by the second medium channel generally being formed by means of a groove extending along the rear side of the cutting device. Similarly, it is also possible and advantageous for the second medium channel to be formed by means of a groove extending along one of the front sides of the spacer. In this case, the wall of the second medium channel is formed by the groove of the spacer on the one hand and the rear side of the cutting blade on the other hand. There is no need for a specially designed cutting blade; a conventional cutting blade with a flat rear side can be used.

[0025] However, especially in the case of the spacer, the second medium channel can also be designed to be immediately closed, rather than designed as an open groove as described above, because due to the material usually used for the spacer, different manufacturing methods can be used for spacer production than for cutting blades. While the cutting blade is, for example, a pressed part made of special ceramics, the spacer is only made of high-strength steel and is preferably made of a material harder than the holder in any case. In a particularly preferred embodiment, the spacer is produced by an additive manufacturing method, for example produced as a 3D printed part by means of 3D printing. Thus, almost any route for the second medium channel can be achieved.

[0026] The blade holder and / or the cutting device advantageously include a deflection profile, which is arranged such that the coolant and / or lubricant flowing out of the second outlet opening impinge on the deflection profile. The deflection profile then at least redirects the medium and advantageously also distributes or atomizes the medium, particularly immediately after it flows out of the second medium channel. The deflection profile is, for example, an edge, a protrusion, a spike, a step, a shoulder, etc. The deflection profile enables the distribution of the medium to be further shaped in the clearance surface. The deflection profile can be used for both single-piece cutting arrangements and multi-piece cutting arrangements.

[0027] Alternatively or in addition to the deflection profile, the lateral surface of the cutting device is designed for the purpose of redirecting, distributing or atomizing a medium, etc. For example, one or more grooves are formed in the lateral surface starting from the second outlet opening, or the lateral surface has a special surface profile at least in the vicinity of the second outlet opening, which further affects the conduction and / or distribution of the medium after flowing out of the second medium channel.

[0028] The transfer of the medium from the first medium channel to the second medium channel can in principle be carried out in various ways, which can also be combined, for example, by providing a plurality of first outlet openings distributed in a suitable manner. In a suitable embodiment, the blade holder includes a lateral surface (e.g., radial or axial), which abuts the cutting device through the lateral surface, and the first outlet opening is arranged in this lateral surface. Then, the transfer of the medium occurs from the lateral surface to the lateral surface, especially in the radial direction or the axial direction or a combination thereof. The second medium channel preferably extends only from one lateral surface of the cutting device to the side of another lateral surface. Alternatively or additionally, the blade holder includes a base, to which the rear side of the cutting device abuts (as already described), and the first outlet opening is arranged in this base. Then the transfer is carried out in the circumferential direction (rotation direction). Thereby, the second medium channel, for example, diagonally passes through the cutting device and extends from the rear side to the lateral surface, or as a groove in the rear side and then parallel to it.

[0029] The position of the first outlet opening in the blade holder is independent of the specific design of the cutting device (with or without a spacer), and is also independent of the specific design of the second medium channel (open groove or closed channel, and the specific route). Therefore, these individual aspects can be combined with each other according to the expectation.

[0030] In a suitable embodiment, the blade holder includes holes (e.g., internal threads) for fastening means (e.g., screws) for mounting the cutting device on the holder. Therefore, the entire cutting device (i.e., optionally including a spacer) includes clearance holes for the fastening means. The holes include recesses, especially at the end facing the cutting device, in which the first outlet opening is at least partially arranged. Therefore, the first medium channel flows into the recess of the hole, from which a particularly effective transfer of the medium is possible, especially to other points in addition to only the second medium channel.

[0031] Particularly preferred is a design in which the first media channel is straight (i.e., completely straight). Correspondingly, the first media channel is not curved. The first media channel is then, for example, a simple hole in the holder and is thus particularly easy to produce. When manufacturing the tool, especially the holder, the first media channel is then simply produced as a single hole in the holder. The first media channel is suitably designed to have a constant diameter, which means it is not conical, but nevertheless this design is basically suitable.

[0032] Also particularly preferred is an embodiment in which at least one cutting device is a first cutting device and in which the tool includes a second cutting device which, when viewed in the circumferential direction, extends behind the first cutting device. The holder includes a radial channel for cooling the cutting surface of the second cutting device. The radial channel extends in the radial direction and in particular from a central channel of the holder. This central channel extends along the longitudinal axis and conducts the media to the radial channels. Advantageously, a corresponding radial channel is formed for each blade seat in the holder. The radial channel includes a (third) outlet opening for ejecting the media onto the front side of the respective cutting device. Correspondingly, the radial channel does not particularly lead to the associated blade seat. The front side corresponds to the cutting surface of the cutting device. The radial channel is preferably designed as a simple straight hole. In this regard, the above explanation regarding the first media channel also applies to the radial channel, but in the opposite direction. Then, the first media channel starts from the radial channel, which means that a branch for the media is formed inside the holder at which a first part of the media is conducted to the cutting surface of the first cutting device and a second part of the media is branched to the clearance surface of the second cutting device. This design is particularly easy to manufacture, especially given a simple straight hole as the first media channel. Generally speaking, the first media channel includes a first inlet opening through which the media flows into the first media channel. Then, the first media channel is connected to the radial channel via this inlet opening.

[0033] Alternatively or in addition to the connector to the radial channel, the first media channel is directly connected to the central channel. Description of the Drawings

[0034] Exemplary embodiments of the invention will be explained in more detail below with reference to the drawings. Schematically shown are:

[0035] Figure 1 a tool,

[0036] Figure 2 is Figure 1 a cross-sectional view showing the tool,

[0037] Figure 3 which is from Figure 1Detailed view of the cutting device of the tool

[0038] Figure 4 is Figure 1 front view of the tool shown in

[0039] Figure 5 from Figure 4 first cross-sectional view of the tool

[0040] Figure 6 from Figure 4 second cross-sectional view of the tool

[0041] Figure 7 is Figure 3 perspective view of the cutting device in

[0042] Figure 8 from Figure 3 another perspective view of the cutting device

[0043] Figure 9 from Figure 3 rear view of the cutting device

[0044] Figure 10 from Figure 3 side view of the cutting device

[0045] Figure 11 from Figure 1 cross-sectional view of a variant of the tool

[0046] Figure 12 is Figure 11 detailed view of the cutting device of the tool shown in

[0047] Figure 13 is a view of the tool different from Figure 11

[0048] Figure 14 is a cross-sectional view of the tool in Figure 11 without the cutting device

[0049] Figure 15 from Figure 12 spacer of the cutting device

[0050] Figure 16 from Figure 1 detailed view of the tool holder of a variant of the tool Detailed Description

[0051] ​Two exemplary embodiments of the tool 2 are shown in the figures. The tool 2 includes a holder 4 and at least one cutting device 6 for machining a workpiece (not shown), in this case a plurality of cutting devices. In the exemplary embodiments shown herein, the tool 2 includes a plurality of similar cutting devices 6, which are regularly distributed in a plane along the toolholder 4. The holder 4 also includes a corresponding number of blade seats 8 in which the cutting devices 6 are mounted. The tool 2 includes exactly one blade seat 8 for each cutting device 6. The holder 4 includes a base body 10 and a plurality of arms 12 (also referred to as tooth feet). The base body 10 is generally cylindrical and solid, where the arms 12 then each form a cantilever on the base body 10 in the radial direction R. The blade seats 8 are integrated into each arm 12.

[0052] The tool 2 shown by way of example in this case is a rotary tool, which means that the holder 4 and the cutting device 6 rotate about a longitudinal axis L during operation, which longitudinal axis L extends in the axial direction A. Perpendicular to this axial direction is the radial direction R. The tool rotates about the longitudinal axis L in the circumferential direction U (tangential direction). The tool 2 shown herein is a milling and / or drilling tool, but the explanations provided herein also apply to other tools.

[0053] Each blade seat 8 includes a base 14, which generally points in the circumferential direction U. Optionally, the blade seat 8 includes one or more lateral surfaces 16 extending laterally from the base 14. The cutting device 6 is generally plate-shaped and includes a rear side 18, which abuts the base 14 and is referred to as a tangential surface due to the final orientation. Moreover, the cutting device 6 includes a front side 20 opposite the rear side 18. In addition, the cutting device 6 includes a plurality of lateral surfaces 22, 24 connecting the front side 20 to the rear side 18. By way of example, the figures show a square cutting device 6 including four lateral surfaces 22, 24, specifically two radial surfaces 22 (pointing in the radial direction R) and two axial surfaces 24 (pointing in the axial direction A).

[0054] The corresponding cutting device 6 includes at least one, typically a plurality (in this case four) cutting edges 26 adjoining the front side 20. The lateral surfaces 22, 24 adjoin the cutting edges 26 and are thus also clearance surfaces, which means that the respective lateral surfaces 22, 24 form a clearance angle with the workpiece during machining.

[0055] The holder 4 includes a first medium channel 28 for conducting a coolant and / or lubricant M, which coolant and / or lubricant M is also simply referred to as "medium" M. The medium M is typically a liquid. The first medium channel 28 includes a first inlet opening 30 and a first outlet opening 32, whereby the first outlet opening is at least partially arranged in one of the blade seats 8 in the blade holder 8. In the case of a plurality of blade seats 8, the tool 2 includes a corresponding number of first medium channels 28. The first medium channel 28 is completely located within the holder 4. The first outlet opening 32 is, for example, rounded or oval-shaped and is completely hidden by the cutting device 6 in this example. The first medium channel 28 extends through both the base body 10 and one of the arms 12 and extends into the integrated blade seat 8.

[0056] The cutting device 6 then includes a second medium channel 34, which is connected to the first medium channel 28 and includes at least one second inlet opening 36 and at least one second outlet opening 38, whereby the at least one second outlet opening is arranged in one of the lateral surfaces 22, 24 of the cutting device 6. The medium M enters the second inlet opening 36 and passes from the first outlet opening 32 of the first medium channel 28 into the second medium channel 34. The first outlet opening 32 and the second inlet opening 36 are directly adjacent to each other, but this is not absolutely necessary. In principle, the second outlet opening 38 can have any desired shape, such as a circular or oval shape.

[0057] The cutting device 6 shown by way of example in this case is rotationally symmetric, i.e., designed as a reversible cutting device, in particular with respect to the cutting edge 26, and in particular rotationally symmetric with respect to the design of the second medium channel 34, such that it is characterized by the same rotational symmetry as the arrangement of the cutting edge 26.

[0058] Thus, the corresponding cutting device 6 itself includes a medium channel 34 (specifically the second medium channel 34) through which the medium M is conducted and then discharged on the lateral surfaces 22, 24, which are actually the clearance surfaces of the cutting device 6. Thus, contrary to the discharge in the circumferential direction U (i.e., the tangential direction), the discharge of the medium M takes place in the axial direction A and / or the radial direction R. Thus, the lateral surfaces 22, 24 are located below the cutting edge 26 of the cutting device 6. This cutting edge 26 travels in front of the corresponding lateral surfaces 22, 24 during operation. Then, this enables the discharge of the medium M, specifically on the clearance surface of the cutting device 6.

[0059] Two possible variants of the cutting device 6 are explained in more detail below.

[0060] In the first possible variant, as Figures 1 to 10The cutting device 6 shown is made of a single piece (i.e., monolithic) and is specifically made as a cutting blade 40 ("cutting blade" or just "blade"). Thus, the cutting device 6 includes only a single cutting blade 40 which is directly mounted in the blade holder 8 and includes a rear side 18 adjacent to the base 14 of the blade holder 8. Optionally, the cutting blade 40 as shown in this figure also abuts the lateral surfaces 16 of the blade holder 8 via lateral surfaces 22, 24.

[0061] In a second possible variant, the cutting device 6 shown, on the other hand, is made of multiple parts and is specifically made as a combination of a cutting blade 40 and a spacer 42. In this case, the spacer 42 is arranged between the cutting blade 40 and the base 14 of the blade holder 8. Due to the spacer 42, the cutting blade 40 is at a certain distance from the base 14, specifically at a height corresponding to the spacer 42. In this second variant, the second medium channel 34 extends through the spacer 42. In the embodiment shown in this case, the second medium channel 34 is actually entirely formed in the spacer 42 and the cutting blade 40 has no medium channel. However, it is also possible and equally suitable to use an embodiment not explicitly shown herein in which the second medium channel 34 partially extends through the spacer 42 and partially through the cutting blade 40. Figures 11 to 15 In the exemplary embodiment in

[0062] In Figures 1 to 10 the second medium channel 34 is formed by means of a groove 44 extending along the rear side 18 of the cutting blade 40. This is particularly evident in Figures 7 to 10 Thus, it is important that the groove 44 is open and the second medium channel 34 is formed as a closed channel only in combination with the blade holder 8. Thus, the second medium channel 34 includes a wall which is formed on the one hand by the groove 44 of the cutting blade 40 and on the other hand by the blade holder 8. The groove 44 is formed directly, for example, during the shaping of the cutting blade 40.

[0063] In principle, the groove 44 can have any desired shape as long as the groove 44 leads from the first outlet opening 32 of the first medium channel 30 to the lateral surfaces 22, 24 of the cutting device 6 and is at least partially covered by the blade holder 8. For example, the groove 44 has an S-shape as seen in Figure 3 、 Figure 8 and Figure 9 In the present case, the groove 44 is also rotationally symmetric and corresponds to the rotational symmetry of the cutting device 6.

[0064] The previously described embodiments, in which the second medium channel 34 is formed by means of the groove 44 on the rear side 18 of the cutting blade 6, can also be combined with the spacer 42, which then completes the wall of the second medium channel 34 instead of the blade holder 8 and, instead, completes the wall of the second medium. Alternatively, the front side of the spacer itself includes a second groove for this purpose, which second groove, for example, simply follows the same route as the groove 44 of the cutting blade 6. The concept of the groove 44 on the rear side 18 can also be advantageously applied in a manner similar to that of the spacer 42, such that the spacer then - regardless of the configuration of the cutting blade 40 - includes a rear side in which the second medium channel 34 is formed by means of the groove 44. Thus, a possible general design is obtained by the second medium channel 34 being formed by the groove 44 extending along the rear side of the cutting device 6 (with or without the spacer). Similarly, the second medium channel 34 can also be formed by the groove 44 extending along the front side of the spacer 42. In this case, the wall of the second medium channel 34 is formed by the groove 44 of the spacer 42 on the one hand and the rear side of the cutting blade 40 on the other hand. No special design of the cutting blade 40 is required. A conventional cutting blade 40 with a flat rear side can be used.

[0065] Specifically, in the case of the spacer 42, the second medium channel 34 can also be designed directly as closed instead of being designed as the open groove 44 as described above. This is the case in the embodiment shown in Figures 11 to 15 . Although the cutting blade 40 is, for example, a pressed part made of special ceramic, the spacer 42 is made only of high-strength steel and is, in any case, a harder material than the holder 4. For example, the spacer is manufactured by an additive manufacturing method, such as being manufactured as a 3D printed part by means of 3D printing. In other words, almost any desired route can be achieved for the second medium channel 34.

[0066] Optionally, the blade holder 8 and / or the cutting device 6 includes a deflection profile 46, which is arranged such that the coolant and / or lubricant M flowing out of the second outlet opening 38 impinges on this deflection profile 46. An exemplary embodiment in this regard is shown in Figure 16 . In this case, the deflection profile 46 is formed on the blade holder 8 and is formed as part of the holder 4. However, the deflection profile 46 can also be formed in a similar manner on the cutting blade 40 or the spacer 42. After the medium M has flowed out of the second medium channel 34, the deflection profile 46 immediately redirects, distributes, and / or atomizes the medium M. The deflection profile 46 is, for example, an edge, a protrusion, a spike, a step, a shoulder, etc. Alternatively or in addition to the deflection profile 46, the lateral surfaces 22, 24 of the cutting device 6 are correspondingly designed for the purpose of redirecting, distributing, or atomizing the medium M, etc.

[0067] The transfer of the medium M from the first medium channel 28 to the second medium channel 34 can in principle take place in different ways, which can also be combined, for example by means of a plurality of first outlet openings 32 with a corresponding distribution. In Figures 11 to 15 In the exemplary embodiment of, the cutting device 6 abuts against the lateral surfaces 16 of the blade holder 8 via the lateral surfaces 22, 24, and the first outlet openings 32 are also arranged in this lateral surface 16. Then, the transfer of the medium M takes place from the lateral surface 16 to the lateral surfaces 22, 24 and accordingly in the radial or axial direction A, R. The second medium channel 34 extends only laterally from one lateral surface 22, 24 of the cutting device 6 to the other lateral surface 22, 24, but this process is not mandatory. Alternatively or additionally, the first outlet openings 32 are arranged in the base 14 of the blade holder 8, as in Figures 1 to 10 In the exemplary embodiment of. Then, the transfer takes place in the tangential direction (circumferential direction U). In this case, the second medium channel 34, for example, diagonally passes through the cutting device 6 from the rear side 18 to the lateral surface 22, 24 (not shown), or as a groove 44 in the rear side 18 and then parallel to it.

[0068] The position of the first outlet openings 32 in the blade holder 8 is independent of the specific design of the cutting device 6 (with or without the spacer 42), and also independent of the specific design of the second medium channel 34 (open groove 44 or closed channel and specific route). Therefore, these individual aspects are shown in the drawings in two special combinations herein, but in principle they can be combined with each other as desired. For example, the arrangement of the first outlet openings 32 from Figures 1 to 6 can also be used in combination with the spacer 42 as shown in Figures 11 to 15 , and conversely, the arrangement of the first outlet openings 32 from Figures 11 to 15 can also be used for Figures 1 to 6 . In both cases, the first medium channel 34 can be formed by means of the groove 44 (as shown in Figures 1 to 10 ), or be formed as a channel (as shown in Figures 11 to 15 ). Therefore, the channels for the spacer 42 as shown can also be directly used in the cutting blade 40, and the spacer 42 can be designed to include the groove 44 on its front side, rear side or both.

[0069] In the embodiments shown herein, the blade holder 8 includes a hole 48 (in this case an internal thread) for a fastening device 50 (in this case a screw), which is used to mount the cutting device 6 on the holder 4. Optionally, the hole 48 includes a recess 52 at the end facing the cutting device 6, and the first outlet openings 32 are at least partially arranged in this recess. The first medium channel 28 thus leads into the recess 52 of the hole 48.

[0070] In the present case, the first media channel 28 is completely straight, as is particularly visible in Figure 2 and Figure 11 . The first media channel 28 is not curved and is a simple hole in the holder 4. When manufacturing the tool 2, specifically the holder 4, the first media channel 28 is simply created as a single hole in the holder 4. In the present case, the first media channel 28 also has a constant diameter.

[0071] As already mentioned in the introduction section, the tools 2 shown herein each include a plurality of cutting devices 6. One of these cutting devices is referred to as the first cutting device 6a, and another cutting device is referred to as the second cutting device 6b, which extends behind the first cutting device 6a in the circumferential direction U. In the exemplary embodiment shown herein, the holder 4 includes a radial channel 54 for cooling the cutting surface in the second cutting device 6b. The radial channel 54 extends in the radial direction R and starts from the central channel 56 of the holder 4. This central channel 56 extends along the longitudinal axis L and conducts the medium M to the radial channel 54. For each blade seat 8, a corresponding radial channel 54 is formed in the holder 4. The radial channel 54 includes an (third) outlet opening for discharging the medium M onto the front side 20 of the respective cutting devices 6a, 6b. Thus, the radial channel 54 leads into the associated blade seat 8. The front side 20 corresponds to the cutting surface of the cutting devices 6a, 6b. In the present case, the radial channel 54 is also designed as a simple straight hole, but it extends in a direction different from the first media channel 28. Then, the first media channel 28 starts from the radial channel 54, which means that a branch 58 for the medium M is formed within the holder 4, at which a first part of the medium M is conducted to the cutting surface of the first cutting device 6a and a second part of the medium M is branched to the clearance surface of the second cutting device 6b.

[0072] List of reference numerals

[0073] 2 Tool

[0074] 4 Holder

[0075] 6 Cutting device

[0076] 6a First cutting device

[0077] 6b Second cutting device (extending behind the first cutting device)

[0078] 8 Blade seat

[0079] 10 Base body (of the holder)

[0080] 12 Arm (of the holder)

[0081] 14 Base

[0082] 16 Lateral surface (of the blade holder)

[0083] 18 Rear side (of the cutting device)

[0084] 20 Front side (of the cutting device)

[0085] 22 Lateral surface (of the cutting device), radial surface

[0086] 24 Lateral surface (of the cutting device), axial surface

[0087] 26 Cutting edge

[0088] 28 First medium channel

[0089] 30 First inlet opening (of the first medium channel)

[0090] 32 First outlet opening (of the first medium channel)

[0091] 34 Second medium channel

[0092] 36 Second inlet opening (of the second medium channel)

[0093] 38 Second outlet opening (of the second medium channel)

[0094] 40 Cutting blade

[0095] 42 Spacer

[0096] 44 Groove

[0097] 46 Deflection profile

[0098] 48 Hole

[0099] 50 Fastening device

[0100] 52 Depression

[0101] 54 Radial channel

[0102] 56 Central channel

[0103] 58 Branch

[0104] A Axial direction

[0105] L Longitudinal axis

[0106] M Medium, coolant and / or lubricant

[0107] R Radial direction

[0108] U Circumferential direction, tangential direction

Claims

1. A tool (2), a. The tool comprises a holder (4), b. The tool comprises at least one cutting device (6, 6a, 6b) for machining a workpiece, c. wherein the holder (4) comprises at least one blade seat (8), the cutting device (6, 6a, 6b) being mounted in the at least one blade seat, d. wherein the holder (4) comprises a first medium channel (28) for conducting a coolant and / or a lubricant (M), e. wherein the first medium channel (28) comprises a first outlet opening (32) arranged at least partially within the blade seat (8), f. wherein the cutting device (6, 6a, 6b) comprises a second medium channel (34), which is connected to the first medium channel (28) and comprises at least one second outlet opening (38) arranged in a lateral surface (22, 24) of the cutting device (6, 6a, 6b).

2. The tool (2) according to claim 1, The cutting device (6, 6a, 6b) is designed to be integrated, specifically, is designed as a cutting blade (40).

3. The tool (2) according to claim 2, The second medium channel (34) is formed by means of a groove (44) extending along the rear side (18) of the cutting blade (40).

4. The tool (2) according to claim 1, The cutting device (6, 6a, 6b) is designed in a multi-part manner, specifically, is designed to include a combination of a cutting blade (40) and a gasket (42), wherein the gasket (42) is arranged between the cutting blade (40) and the base (14) of the blade holder (8), The second medium channel (34) extends through the gasket (42).

5. Tool (2) according to one of claims 1 to 4, The blade holder (8) and / or the cutting device (6, 6a, 6b) comprises a deflection profile (46) which is arranged such that the coolant and / or lubricant (M) leaving the second outlet opening (38) impinges on the deflection profile (46).

6. Tool (2) according to one of claims 1 to 5, The blade seat (8) comprises a lateral surface (22, 24) which adjoins the cutting device (6, 6a, 6b) and in which the first outlet opening (32) is arranged.

7. Tool (2) according to one of claims 1 to 6, The blade holder (8) comprises a base (14) which adjoins the cutting device (6, 6a, 6b) and in which the first outlet opening (32) is arranged.

8. Tool (2) according to one of claims 1 to 7, The blade holder (8) comprises a hole (48) for a fastening device (50), wherein the fastening device is used to mount the cutting device (6, 6a, 6b), The hole (48) comprises a depression (52) in the direction of the cutting device (6, 6a, 6b), the first outlet opening (32) being arranged in the depression.

9. Tool (2) according to one of claims 1 to 8, The first medium channel (28) is designed to be straight.

10. The tool (2) according to one of claims 1 to 9, wherein the at least one cutting device is a first cutting device (6a), wherein the tool (2) comprises a second cutting device (6b) extending behind the first cutting device (6a), wherein the holder (4) comprises radial channels (54) for cooling the cutting surface in the second cutting device (6b), The first medium channel (28) extends from the radial channel (54).

11. Tool (2) according to one of claims 1 to 10, The tool is a rotating tool, in particular a milling and / or drilling tool.

12. A cutting device (6, 6a, 6b) for a tool (2) according to one of claims 1 to 11.

13. A method for producing a tool (2) according to one of claims 1 to 11, The first medium channel (28) is manufactured as a hole in the holder (4).

Images