TURNING TOOL SYSTEM WITH A TURNING TOOL HOLDER

Description

[0001] The present invention relates to a turning tool system with a turning tool holder.

[0002] Various processes are used in the machining of workpieces, of which turning is among the most commercially important. Particularly in the machining of metallic materials, a trend toward increasingly complex machining operations and ever-increasing machining speeds can be observed, which is accompanied by increased demands on the cooling of the turning tool used. Furthermore, more difficult-to-machine materials are increasingly being used, which also place greater demands on the cooling of the turning tool.

[0003] Turning often involves using turning tools in which the cutting edge that engages the material to be machined is mounted on a replaceable cutting insert made of a particularly hard and wear-resistant material, such as cemented carbide, cermet, or a cutting ceramic, which is attached to a seat on a turning tool holder made of a tougher material, such as steel. In addition to a long-established technique in which coolant is supplied to the cutting edge area via coolant hoses and nozzles designed separately from the turning tool, in recent years there has been an increasing use of turning tools that feature an internal coolant guide that has at least one coolant channel that runs through the interior of the turning tool holder.In the present context, the term nozzle is understood to mean a structure that enables the exit of a directed jet without this structure necessarily having to have a focusing or flow velocity-increasing design.

[0004] When implementing an internal coolant system in a turning tool holder, a common problem in practice is that the nozzles from which the coolant flows toward the cutting edge are subject to severe wear from the chips generated during turning. Particularly in turning tool holders used for various turning operations or under different operating parameters, the problem often arises that the nozzles prevent the chips generated during turning from flowing freely.

[0005] US 5,340,242 A describes a turning tool system according to the preamble of claim 1.

[0006] EP 3 219 421 A1 describes a tool holder with fluid supply channels for supercritical CO 2 .

[0007] It is an object of the present invention to provide a turning tool system which is cost-effective to manufacture, enables a targeted supply of coolant to the area of ​​the cutting edge, is robust and insensitive to the conditions during turning and preferably also enables the use of a so-called minimum quantity lubrication (MQL).

[0008] The problem is solved by a turning tool system according to claim 1. Advantageous further developments are specified in the dependent claims.

[0009] Since the nozzle body is designed to be replaceable, it can be replaced easily and cost-effectively in the event of wear. In the event that the nozzle body should be spatially in the way during the intended turning operation, it can also be removed and, if necessary, replaced with a blind plug. Since the inner coolant channel extends through the shaft section and the nozzle outlet area angled thereto, which can preferably be formed integrally or monolithically, a particularly compact design is possible. Furthermore, the inner coolant channel can be formed in this way without significant changes to the flow cross-section, thereby avoiding undesirable pressure drops and undesirable separation of the coolant.Since the nozzle body is attached to the machining section via the clamping element arranged in the turning tool holder, which extends transversely to the longitudinal axis of the shaft section, the fastening mechanism is well protected against both chips and the coolant used. Compared to a design in which, for example, the shaft section were provided with an external thread that interacts directly with an internal thread in the bore, the nozzle body can be attached very quickly, and the part of the nozzle body protruding from the surface of the machining section does not need to be provided with interfering engagement surfaces for a screwing tool.

[0010] According to a further development, the clamping element is arranged in a transverse bore communicating with the bore. In this case, a particularly well-protected and compact arrangement of the fastening mechanism is realized. The transverse bore can, for example, extend essentially perpendicular to the bore.

[0011] According to a further development, the transverse bore is a threaded bore with an internal thread that interacts with an external thread on the clamping element. In this case, the nozzle body can be attached to the machining section particularly quickly and reliably. If the clamping element is designed as a grub screw (i.e., a screw without a laterally protruding screw head), a particularly compact implementation of the fastening mechanism is achieved.

[0012] According to a further development, the recess is an annular groove extending around the shaft area. In this case, the recess can be created particularly simply and cost-effectively by turning during the manufacture of the nozzle body.

[0013] According to a further development, the recess has a clamping surface extending obliquely to a longitudinal axis of the shaft region, onto which a retaining surface of the clamping element acts in a wedge-shaped manner, so that the nozzle body is clamped against the surface of the machining section. In this case, the nozzle body is particularly reliably attached to the machining section by utilizing the principle of the inclined plane, and the fastening mechanism is highly insensitive to manufacturing tolerances. The clamping surface can particularly preferably extend at an angle between 20° and 70° to the longitudinal axis of the shaft section, preferably between 35° and 55°.

[0014] According to a further development, a first anti-rotation element is arranged on the surface of the machining section, which interacts with a second anti-rotation element on an underside of the nozzle outlet area to prevent rotation of the nozzle body about a longitudinal axis of the shaft area. In this case, it is ensured in a particularly simple and cost-effective manner that the exiting coolant jet is reliably directed to the intended area of ​​the cutting insert.

[0015] If the first anti-rotation element is a projection and the second anti-rotation element is a recess in the underside of the nozzle outlet area, this also enables particularly simple and cost-effective production of the anti-rotation mechanism. In particular, the second anti-rotation element can be formed by a pin arranged in a further bore extending from the surface of the machining section, which enables particularly fast and cost-effective production of the turning tool holder. The pin can, for example, simply be pressed into the further bore or be provided with an external thread that interacts with an internal thread in the further bore.

[0016] According to a further development, the coolant outlet is arranged such that a coolant jet emerging from the nozzle body is directed onto a chip surface of a cutting insert arranged on the seat. In this case, particularly efficient cooling of the turning tool and the machined surface of the workpiece is provided.

[0017] According to a further development, an annular sealing element is arranged between an outer circumferential surface of the shaft region and an inner circumferential surface of the bore. In this case, unwanted lateral leakage of the coolant is reliably prevented, and the sealing element is reliably protected against damage. The sealing element can be formed, for example, by an O-ring arranged in a circumferential groove. If the sealing element is arranged on a side of the recess facing away from the nozzle outlet region, the fastening mechanism for the nozzle body is also reliably protected against contamination and contact with the coolant by the sealing element.

[0018] At least one further coolant outlet with a bore extending from the surface is formed on the machining section to the side of the seat. The further coolant outlet can preferably be designed substantially identically to the first coolant outlet. By providing the further coolant outlet, particularly efficient cooling of the cutting edge can be achieved by supplying two coolant jets to the chip surface. Furthermore, the further coolant outlet makes it possible, for example, instead of the first coolant outlet, to supply a coolant jet to the area of ​​the cutting edge only via the further coolant outlet and a nozzle body arranged there. In this case, for example, the bore of the first coolant outlet can be closed off by a blind plug.This can be particularly advantageous if the arrangement of the nozzle body in the bore of the first coolant outlet would hinder chip flow or otherwise spatially hinder turning.

[0019] The first coolant outlet and the additional coolant outlet are designed such that the nozzle body can be inserted selectively into the bore of the first coolant outlet or into the bore of the additional coolant outlet. Thus, the same nozzle body can be used at both the first coolant outlet and the additional coolant outlet, and the same blind plug can be used, if desired, to selectively close the bore of the first coolant outlet or the bore of the additional coolant outlet.

[0020] According to a further development, the coolant channel formed in the nozzle body is free of abrupt cross-sectional changes. In this case, a sharp drop in coolant pressure across the nozzle body is reliably prevented, and the coolant jet can be delivered to the cutting edge area at high pressure. Furthermore, unwanted separation of the coolant can be prevented, which is particularly advantageous in the case of so-called minimum quantity lubrication (MQL).

[0021] According to a further development, the coolant channel extends through the nozzle body in a spatially curved manner. The coolant channel can extend through the nozzle body, in particular, in an arc shape, without abrupt changes in direction. In this case, an undesirably high pressure drop and the risk of coolant separation are particularly reliably avoided.

[0022] According to a further development, the nozzle body is made of a different material than the rest of the turning tool holder. Preferably, the nozzle body can be made of a harder and more wear-resistant material, such as cemented carbide. In this case, the nozzle body does not wear as quickly, even when it comes into contact with, for example, flowing chips.

[0023] The turning tool system comprises at least one blind plug that can be inserted into the bore instead of the nozzle body to seal it fluid-tight. By providing the additional blind plug, the first coolant outlet can be reliably closed and, if provided, another coolant outlet can be used instead if the arrangement of the nozzle body in the bore of the first coolant outlet would impede the intended turning operation.

[0024] Further advantages and benefits of the invention will become apparent from the following description of embodiments with reference to the accompanying figures.

[0025] From the figures show: Fig. 1: a schematic perspective view of a turning tool holder according to an embodiment with a mounted nozzle body and a mounted blind plug; Fig. 2: a schematic side view of the machining section in the turning tool holder from Fig. 1 ; Fig. 3: a schematic perspective view of the nozzle body; Fig. 4: a schematic side view of the nozzle body; Fig. 5: a schematic plan view of the machining section in the turning tool holder from Fig. 1 ; Fig. 6: an enlarged detail of a section along CC in Fig. 5 ; Fig. 7: a schematic perspective view of the blind plug; Fig. 8: a schematic side view of the blind plug without sealing element; Fig. 9: an enlarged detailed view of a section along BB in Fig. 5 ; Fig. 10: an enlarged detail of a section along DD through the blind plug in Fig. 5 ; Fig. 11: a schematic perspective view of the turning tool holder with two mounted nozzle bodies; and Fig. 12: a schematic top view of the turning tool holder without nozzle body and without blind plug.

[0026] An embodiment of the turning tool holder 1 is described below with reference to the Fig. 1 bis Fig. 12 described. In the specific example shown, the turning tool holder 1 is designed as a so-called monoblock holder; however, it should be noted that the turning tool holder 1 can also have other configurations.

[0027] The turning tool holder 1 has a clamping section 2 for clamping to a tool holder of a processing machine and a machining section 3 which is formed integrally or monolithically with the clamping section 2 and on which a seat 4 is formed for receiving an interchangeable cutting insert 20. The turning tool holder 1 can be made, for example, of steel or a relatively tough hard metal. Although the specific example shows an implementation in which the seat 4 is designed such that the cutting insert 20 is fastened to the seat 4 via a fastening screw 21, other conventional designs, such as fastening via a clamping claw or the like, are also possible.

[0028] The cutting edge 22, which engages the material to be machined, is formed on the cutting insert 20 in a conventional manner. The cutting insert 20 is made of a hard and wear-resistant material and can be formed, in particular, from cemented carbide, cermet, or a cutting ceramic. The cutting insert 20 can be designed, in particular, as an indexable insert having a plurality of cutting areas that can be inserted one after the other.

[0029] The turning tool holder 1 has an internal coolant guide, which is designed to supply coolant through the interior of the turning tool holder 1 to the machining section 3. The internal coolant guide has at least one first coolant inlet 5, via which coolant can be supplied into the internal coolant guide. Although in the illustrated embodiment, only one coolant inlet 5 is shown, which is formed on an end face of the clamping section 2, the turning tool holder 1 can preferably have a plurality of alternatively usable coolant inlets 5, which are each connected in a communicating manner to the internal coolant guide. The coolant inlets that are not specifically required can be closed with a closure element 6, as shown in Fig. 1 is shown as an example for the first coolant inlet 5.

[0030] As particularly in the Fig. 11 und Fig. 12 As can be seen, in the specifically illustrated example, the turning tool holder 1 has a first coolant outlet 7a and a further coolant outlet 7b, each formed on an upper surface 8 of the machining section 3 laterally of the seat 4. In the embodiment, both the first coolant outlet 7a and the second coolant outlet 7b are designed to supply coolant to a chip surface of the replaceable cutting insert 20.

[0031] As particularly in the Fig. 1, Fig. 2 and Fig. 11 As can be seen, in the embodiment, a third coolant outlet 9 is also formed, which is also in fluid connection with the internal coolant guide and via which coolant can be supplied to a free surface of the cutting insert 20.

[0032] Since the first coolant outlet 7a and the further coolant outlet 7b are essentially identical to one another apart from their spatial position, only the first coolant outlet 7a is described in more detail below and the description applies equally to the further coolant outlet 7b.

[0033] The first coolant outlet 7a has a bore 10 that extends from the surface 8 of the machining section 3 into the material of the turning tool holder 1 and is in fluid communication with the first coolant inlet 5 and, if present, additional coolant inlets via the internal coolant guide. In this embodiment, the bore 10 is formed as a cylindrical bore whose longitudinal axis extends perpendicular to the surface 8. In this embodiment, the bore 10 is provided, in particular, with a smooth wall.

[0034] As particularly in the Fig. 6 , Fig. 9 and Fig. 11 As can be seen, a replaceable nozzle body 30 is inserted into the bore 10 of the first coolant outlet 7a, which will be described in more detail below. The nozzle body 30 can preferably be made of a different material than the rest of the turning tool holder, in particular of a harder and more wear-resistant material. For example, the nozzle body 30 can be made of hard metal. In this case, it is particularly resistant to wear caused by running off chips. The nozzle body 30 is in the Fig. 3 und Fig. 4 further shown individually. The nozzle body 30 is formed in one piece or monolithically and has a shaft portion 31, which is designed such that it can be inserted into the bore 10, and a nozzle outlet portion 32 formed at an angle thereto. The shaft portion 31 is formed rotationally symmetrical with respect to a longitudinal axis L, which in Fig. 4 is shown schematically. In the specifically illustrated embodiment, an annular circumferential recess is formed on the outer circumference of the shaft region, in which an annular sealing element 40 is arranged. In the illustrated embodiment, the annular sealing element 40 is realized as a rubber O-ring. The shaft region 31 and the annular sealing element 40 are dimensioned such that the shaft region 31 can be inserted into the bore 10 and the annular sealing element 40 is arranged in a sealing manner between the outer circumferential surface of the shaft region 31 and the inner circumferential surface of the bore 10. In this way, the annular sealing element 40 prevents undesired coolant passage between the outer circumferential surface of the shaft region 31 and the inner circumferential surface of the bore 10.

[0035] The angled nozzle outlet region 32 of the nozzle body 30 is oriented such that an underside of the nozzle outlet region 32 rests on the surface 8 of the machining section 3 when the shaft region 31 is inserted into the bore 10. In order to fix the nozzle body 30 in its orientation and to prevent rotation of the nozzle body 30 about the longitudinal axis L, a first anti-rotation element 11 is arranged on the surface 8 of the machining section 3, which interacts with a second anti-rotation element 33 arranged on the underside of the nozzle outlet region 32. In the embodiment shown in the drawings, the second anti-rotation element 33 is designed as a recess in the underside of the nozzle outlet region 32 and the first anti-rotation element 11 as a projection engaging therein, as shown in particular in Fig. 9 can be seen. This can be implemented in a particularly simple and cost-effective manner. However, a reverse design is also possible, in which the first anti-rotation element 11 is designed as a recess and the second anti-rotation element 33 as a projection. In the example shown, the first anti-rotation element 11 is formed by a pin 12 which is inserted into a bore 13 extending from the surface 8 of the machining section 3, which enables a particularly cost-effective implementation. The pin 12 can, for example, be pressed into a smooth-walled bore 13 or the pin 12 can be provided with an external thread which interacts with a corresponding internal thread in the bore 13.

[0036] The nozzle body 30 has an outlet opening 35 for a coolant jet at the nozzle outlet area 32, which is aligned via the interaction of the first anti-rotation element 11 and the second anti-rotation element 33 such that the coolant jet is directed onto a chip surface of a cutting insert 20 arranged on the seat 4. As can be seen in particular in the Fig. 6 and Fig. 9 As can be seen, an inner coolant channel 36 extends through the shaft region 31 and the nozzle outlet region 32 angled thereto, said channel being designed to conduct coolant from the inner coolant guide to the outlet opening 35. The inner coolant channel 36 extends through the nozzle body 30 in a spatially curved manner and is free of abrupt cross-sectional changes, so that the coolant in the nozzle body 30 is gently deflected toward the outlet opening 35. In the shaft region 31, the inner coolant channel 36 extends essentially parallel and coaxial to the longitudinal axis L.

[0037] The fastening of the nozzle body 30 in the bore 10 is described below with reference to the Fig. 3, Fig. 4 and Fig. 6 described in more detail.

[0038] As in the Fig. 3 und Fig. 4 As can be seen, the shaft region 31 of the nozzle body 30 is provided with a recess 37. In the exemplary embodiment, the recess 37 is designed as a groove running annularly around the shaft region 31. In the example shown, the groove runs annularly, in particular coaxially to the longitudinal axis L, which enables particularly simple and cost-effective production. The recess 37 also has a substantially trapezoidal cross-sectional profile, as in Fig. 4 and in Fig. 6 As can be seen particularly in Fig. 6 As can be seen, a transverse bore 14 communicating with the bore 10 is formed in the machining section 3 of the turning tool holder 1. The transverse bore 14 extends transversely to the bore 10 and consequently also transversely to the longitudinal axis L of the shank region 31. In particular, the transverse bore 14 can extend perpendicular to the longitudinal axis L. In the exemplary embodiment, the transverse bore 14 is formed as a threaded bore with an internal thread and extends to a side surface of the machining section 3.

[0039] A clamping element 16 is arranged in the transverse bore 14 and is designed to engage the recess 37 on the shaft region 31 in order to fasten the nozzle body 30 to the processing section 3. The clamping element 16 is provided with an external thread that interacts with the internal thread in the transverse bore 14. A side of the clamping element 16 facing away from the bore 10 is provided with an engagement structure for a screwing tool, via which engagement structure the clamping element 16 can be actuated with a screwing tool that is inserted from the side surface of the processing section 3 into the transverse bore. The engagement structure can be designed, for example, as a slot for a slotted screwdriver, as a Phillips head, as a hexagon socket, or the like. In the specifically illustrated embodiment, the clamping element 16 is designed as a grub screw.

[0040] As in Fig. 6 As can be seen, the recess 37 on the shaft region 31 of the nozzle body 30 has a clamping surface 37a that runs obliquely to the longitudinal axis L of the shaft region 31 and is determined by the trapezoidal cross-sectional profile of the recess 37. The clamping surface 37a is oriented at an angle such that it moves away from the longitudinal axis L with increasing distance from the nozzle outlet region 32, thus widening the outer circumference of the shaft region 31 with increasing distance from the nozzle outlet region 32. The end face of the clamping element 16 facing the bore 10 is laterally beveled or chamfered, so that a holding surface 16a that also runs obliquely to the longitudinal axis L is formed. The outer circumference of the clamping element 16 thus tapers in the direction of the bore 10.The position of the recess 37 on the shaft portion 31 and the position of the transverse bore 14 are coordinated such that the retaining surface 16a of the clamping element 16 acts wedge-shaped according to the principle of the inclined plane on the clamping surface 37a of the recess 37 such that the nozzle body 30 is drawn into the bore 10 when the clamping element 16 is screwed into the transverse bore 14. In this way, the nozzle body 30 is clamped against the surface 8 of the machining section 3, whereby the first anti-rotation element 11 and the second anti-rotation element 33 are also held in positive engagement.

[0041] The recess 37 is arranged on the shaft region 31 between the nozzle outlet region 32 and the annular sealing element 40, so that the clamping mechanism formed by the clamping element 16 and the recess 37 is arranged so as to be protected from the coolant.

[0042] The additional coolant outlet 7b is designed in a manner similar to the first coolant outlet 7a. Consequently, a bore 10 and a transverse bore 14 with a clamping element 16 are also provided, and a first anti-rotation element 11 is also provided on the surface 8 of the machining section 3.

[0043] Due to the corresponding design of the first coolant outlet 7a and the further coolant outlet 7b, the nozzle body 30 can be inserted either into the bore 10 of the first coolant outlet 7a or into the bore 10 of the further coolant outlet 7b. Furthermore, it is possible, for example, to insert a nozzle body 30 into both the bore 10 of the first coolant outlet 7a and the bore 10 of the second coolant outlet 7b, as shown, for example, in Fig. 11 is shown. If only one nozzle body 30 is to be used, which may be the case, for example, if the arrangement of a nozzle body 30 in the bore 10 of the first coolant outlet 7a or in the bore 10 of the further coolant outlet 7b would have a spatially disturbing effect during turning, the bore 10 of the first coolant outlet 7a or the bore 10 of the further coolant outlet 7b can be closed with a blind plug 50, which will be described below. Fig. 1, Fig. 2 , Fig. 5 and Fig. 10 In each case, a situation is shown in which the further coolant outlet 7b is sealed fluid-tight by means of a blind plug 50.

[0044] If neither the first coolant outlet 7a nor the second coolant outlet 7b is to be used, both can be closed with respective blind plugs 50.

[0045] The blind plug 50 is in Fig. 8 shown in a side view without an annular sealing element 40, in Fig. 7 in a perspective view with an annular sealing element 40 arranged thereon. The blind plug 50 has a shaft region 51, the outer circumferential surface of which is formed substantially identically to the shaft region 31 of the nozzle body 30, as shown in the Fig. 7 und Fig. 8 can be seen. In Fig. 10For the sake of simplicity, the annular sealing element 40 is not shown. The shaft portion 51 of the blind plug has a recess 37 with a clamping surface 37a and a circumferential depression in which the annular sealing element 40 is received. Instead of the nozzle outlet portion 32 in the nozzle body 30, the blind plug 50 has a flat cover portion 52 that has a slightly larger cross-section than the bore 10 and is designed to be so flat that it does not protrude significantly from the surface 8 of the machining section 3 when the shaft portion 51 is received in the bore 10.

[0046] Due to the substantially identical design of the shaft portion 51 of the blind plug 50 to the shaft portion 31 of the nozzle body 30, the blind plug 50 can be fastened with the clamping element 16 in the bore 10 of the first coolant outlet 7a and in the bore of the second coolant outlet 7b in the same manner as previously described for the nozzle body 30.

Claims

1. A turning tool system having a turning tool holder (1), the turning tool holder (1) having a clamping portion (2) for connection to a tool fitting of a machine tool and a machining portion (3) having a seat (4) for receiving an interchangable cutting insert (20), wherein formed in the turning tool holder (1) is an internal coolant guide for supplying coolant to the machining portion (3), which coolant guide has at least one first coolant inlet (5) and at least one first coolant outlet (7a) arranged at the side of the seat (4) on the machining portion (3), wherein the first coolant outlet (7a) has a bore (10) which is arranged at the side of the seat (4) and extends from a surface (8) of the machining portion (3), and in which is inserted an interchangable nozzle body (30), which has a shank region (31) inserted into the bore (10) and a nozzle outlet region (32) which is formed at an angle to said shank region and is arranged on the surface (8) of the machining portion (3), wherein an internal coolant channel (36) extends through the shank region (31) and the nozzle outlet region (32) that is at an angle to said shank region, characterized in that the shank region (31) has on an outer circumferential surface a recess (37), into which a clamping element (16) arranged in the turning tool holder (1) and arranged transverse to a longitudinal axis (L) of the shank region (31) engages, by means of which clamping element the nozzle body (30) is fastened to the turning tool holder (1), at least one further coolant outlet (7b) with a bore (10) extending from the surface (8) is formed on the machining portion (3) at the side of the seat (4), the first coolant outlet (7a) and the further coolant outlet (7b) are formed in such a way that the nozzle body (30) can be inserted selectively into the bore (10) of the first coolant outlet (7a) or into the bore (10) of the further coolant outlet (7b), and the turning tool system has at least one blind plug (50), which can be inserted into the bore (10) of the first coolant outlet (7a) or into the bore of the further coolant outlet (7b) instead of the nozzle body (30) in order to close said bore in a fluid-tight manner.

2. The turning tool system as claimed in claim 1, wherein the clamping element (16) is arranged in a transverse bore (14) which is connected to the bore (10) in a communicating manner.

3. The turning tool system as claimed in claim 2, wherein the transverse bore (14) is a threaded bore with an internal thread which interacts with an external thread on the clamping element (16).

4. The turning tool system as claimed in one of claims 1 to 3, wherein the recess (37) is a groove which encircles the shank region (31) in an annular manner.

5. The turning tool system as claimed in one of the preceding claims, wherein the recess (37) has a clamping surface (37a) which runs obliquely with respect to a longitudinal axis (L) of the shank region (31) and on which a holding surface (16a) of the clamping element (16) acts in a wedge-shaped manner, with the result that the nozzle body (30) is clamped against the surface (8) of the machining portion (3).

6. The turning tool system as claimed in one of the preceding claims, wherein arranged on the surface (8) of the machining portion (3) is a first rotation-prevention element (11), which interacts with a second rotation-prevention element (33) on a bottom side of the nozzle outlet region (32) for the purpose of preventing rotation of the nozzle body (30) about a longitudinal axis (L) of the shank region (31).

7. The turning tool system as claimed in claim 6, wherein the first rotation-prevention element (11) is a projection and the second rotation-prevention means (33) is a depression in the bottom side of the nozzle outlet region (32).

8. The turning tool system as claimed in one of the preceding claims, wherein the first coolant outlet (7a) is arranged in such a way that a coolant jet emerging from the nozzle body (30) is directed onto a rake face of a cutting insert (20) arranged on the seat (4).

9. The turning tool system as claimed in one of the preceding claims, wherein an annular sealing element (40) is arranged between an outer circumferential surface of the shank region (31) and an inner circumferential surface of the bore (10).

10. The turning tool system as claimed in claim 9, wherein the sealing element (40) is arranged on a side of the recess (37) that faces away from the nozzle outlet region (32).

11. The turning tool system as claimed in one of the preceding claims, wherein the coolant channel (36) formed in the nozzle body (30) is free of abrupt changes in cross section.

12. The turning tool system as claimed in one of the preceding claims, wherein the coolant channel (36) extends in a spatially curved manner through the nozzle body (30).

13. The turning tool system as claimed in one of the preceding claims, wherein the nozzle body (30) is formed from a different material than the remainder of the turning tool holder (1).