EP3641973A1

EP3641973A1 - Whirling tool

Info

Publication number: EP3641973A1
Application number: EP18808268.9A
Authority: EP
Inventors: Markus Kannwischer
Original assignee: Hartmetall Werkzeugfabrik Paul Horn GmbH
Current assignee: Hartmetall Werkzeugfabrik Paul Horn GmbH
Priority date: 2017-11-20
Filing date: 2018-11-20
Publication date: 2020-04-29
Also published as: US11517967B2; CN111565875A; US20200238391A1; CA3079630A1; RU2738868C1; MX2020005157A; JP2021503383A; CN111565875B; DE102017127307A1; CA3079630C; WO2019097074A1

Abstract

The invention relates to a whirling tool (10) for machining a workpiece, comprising: a plurality of cutting plates (14), each of the cutting plates (14) having at least one cutter (15); a cutting plate carrier (12) having a plurality of cutting plate holders (22) for holding and releasable fastening of a respective one of the cutting plates (14), the cutting plate holders (22) being arranged such that the cutting plates are distributed in the circumferential direction over the cutting plate carrier(12). The cutting plate carrier (12) has a through opening (34) which extends along a central axis (26) of the cutting plate carrier (12) and through which the workpiece can be passed during the machine, and in the installed state the cutting plates (14) protrude into the through opening (34). The tool also comprises a coolant channel (38) which is arranged in the cutting plate carrier (12) and extends between an inlet opening (40) and an outlet opening (42), the outlet opening (42) leading into the through opening (34) and/or being oriented in the direction of the through opening (34).

Description

Wirbelwerkzeuq

The present invention relates to a swirling tool for machining a

Workpiece. The whirling tool according to the invention has a plurality of cutting plates, each of the cutting plates having at least one cutting edge. The swirling tool according to the invention also has a cutting plate carrier, which has a plurality of cutting plate receptacles for receiving and releasably securing each one of the cutting plates, wherein the cutting plate receptacles are distributed circumferentially over the cutting plate carrier, wherein the cutting plate carrier along a Central axis of the cutting plate carrier extending through opening, through which the workpiece during machining is guided, and wherein the cutting plates protrude in the assembled state in the through hole.

A generic whirling tool of the above type is known from DE 10 2015

1 15 310 A1 known. ) 003] Whirling is a machining production process which forms a special form of screw milling with regard to the tool and the kinetics. Whirling serves in particular for the production of threads, but can also generally be used for the production of rotationally symmetrical parts, such as screws, screws or rotors.

) 004] Due to the high performance of this machining process, eddies are particularly suitable for machining workpieces made of tough materials such as titanium or precious metal. For this reason, for example, nowadays the majority of all bone screws are made by thread whirling.

) 005] Characteristic of the whirling is that both the whirling tool and the

Turn workpiece. The swirl tool, which determines the cutting speed, orbits eccentrically positioned at high speed around the slowly rotating workpiece. The advance of the workpiece along its longitudinal axis is set according to the desired thread pitch to be produced. In addition, the eddy tool is pivoted according to the desired thread pitch. The radial feed of the swirling tool relative to the workpiece determines the thread depth.

) 006] Due to the eccentric positioning of the workpiece relative to the

Whirling tool it comes to the formation of relatively short chips. This has an advantageous effect on the surface finish of the machined workpiece.

) 007] The swirling tool according to the present invention is particularly suitable for external whirling. External vortexing, in contrast to internal vortexing, which is used to produce internal threads, is typically used to produce external threads. In external whirling, the blades are directed inwardly, with the blades projecting into the central through hole of the swirling tool. The whirling tool rotates around the workpiece. External whirling is therefore sometimes also referred to as milling with internally toothed milling cutters.

) 008] E in fundamental problem, which can be found in eddy tools, is the relatively high wear of the cutting used. This often leads to low standstill Times. In the case of swirl tools with exchangeable inserts, therefore, the inserts must be replaced frequently. This in turn leads to increased production costs.

) 009] One of the reasons for the relatively high wear of the inserts is i.a. the

difficult to ensure coolant supply. Due to the geometry of the swirl tools and the relatively complex motion that the swirling tools perform during machining of the workpiece, coolant delivery is difficult compared to many other cutting tools. This is u.a. also because the swirling tools are usually not clamped directly into the usual tool interface of a machine tool or an interchangeable robot on the machine tool. Due to the oblique position of the swirling tool necessary for swirling, specially adapted swirling units are usually used which serve as a kind of adapter between the machine tool and the swirling tool.

) 010] In the case of most whirling tools, the cooling takes place via external

Coolant hoses or pipes. The cooling is therefore far away from the cutting site. A reliable cooling of the inserts or cutting can not always be guaranteed. Likewise, the direction of the coolant jet is often severely limited due to the external coolant supply.

) 011] The present invention is therefore based on the object to provide a whirling tool with optimized cooling and lubricant supply.

) 012] This object is achieved by a whirling tool of the aforementioned

Solved by the fact that the swirling tool has a coolant channel, which is arranged in the cutting plate carrier and extending between an inlet opening and an outlet opening, wherein the outlet opening opens into the passage opening of the cutting plate carrier and / or aligned in the direction of the passage opening of the cutting plate carrier. ) 013] The vortex tool according to the invention, in contrast to the known from the prior art eddy tools on an inner coolant supply, with a coolant channel, which extends through the interior of the cutting plate carrier. Since the outlet opening of the coolant channel opens into the through opening and / or is aligned in the direction of the latter, the coolant and lubricant exit the coolant channel at a location which is very close to the cutting site. Since the cutting plates with their cutting edges also protrude into the central passage opening of the cutting plate carrier, the coolant and lubricant that emerges from the outlet opening can reach very close to the cutting edges. As a result, an optimal cooling and lubrication of the blades is achieved, whereby the wear of the cutting plates is significantly reduced. This leads to longer service lives and enables cost savings.

) 014] Due to the favorable arrangement of the outlet opening of the coolant channel takes place

In addition, a targeted removal of the resulting chips from the processing room. In addition to the improved chip removal, an improved chip breakage can also be achieved. This allows a higher surface quality on the workpiece surfaces, which are processed by means of the whirling tool according to the invention.

) 015] According to a preferred embodiment of the invention, the outlet opening of the

Coolant channel between two adjacent inserts arranged.

) 016] This has the advantage that the space between two adjacent inserts can be used to optimally direct the coolant and lubricant to the processing point. Incidentally, as a result, coolant and lubricant also reach both the front side of an insert and the rear side of the adjacent cutting plate.

Although a coolant passage having a single exhaust port is basically sufficient for the present invention, the swirling tool according to a preferred embodiment has a plurality of these coolant passages, the number of coolant passages corresponding to the number of cutting plates and each of the coolant passages in the cutting plate carrier is arranged and between each one inlet opening and each extending an outlet opening, wherein between each two adjacent

Cutting plates each one of the outlet openings is arranged. In this way, a uniform cooling and lubrication of each of the cutting plates can be ensured. It is understood that more coolant channels than cutting inserts can be provided, and that more than one outlet opening can be arranged between each two cutting plates.

) 018] For the sake of simplicity, reference will only be made to a coolant channel with respect to the configurations described below. However, it is understood that the embodiments explained below can relate both to the configuration of the swirling tool according to the invention with only a single coolant channel and to an embodiment of the swirling tool according to the invention with a plurality of coolant channels.

) 019] According to a further embodiment, the passage opening is bounded in the radial direction by an inner wall of the cutting plate carrier, wherein the outlet opening is arranged on the inner wall.

) 020] The said inner wall defines at least a part of the passage opening. In other words, it forms the outer edge of the passage opening. By attaching the outlet opening on this inner wall, an optimal supply of coolant and lubricant can be ensured, which provides for targeted cooling and lubrication of the clamping surfaces, free surfaces and / or cutting of the cutting plates in the immediate vicinity of the cutting point.

) 021] Preferably, the cutting plate receptacles in which the cutting plates are arranged, arranged on a front side of the cutting plate carrier, which is transverse to the central axis of the cutting plate carrier. In this case, "transverse" is understood to mean any orientation which is not parallel, that is to say an alignment at an angle not equal to 0 °. The term "cross" can, but does not necessarily mean orthogonal. ) 022] According to one embodiment of the present invention, the inlet opening is arranged on a rear side of the cutting plate carrier which lies opposite the front side of the cutting plate carrier and which extends transversely to the central axis.

) 023] The arrangement of the inlet opening on the back of the cutting plate carrier allows a simple transfer of the coolant and lubricant between the machine tool or vortex unit and the swirling tool. From the inlet opening on the back, the coolant and lubricant can then be guided through the interior of the cutting plate carrier to the outlet opening of the coolant channel.

) 024] According to a further embodiment, a circumferentially extending groove is arranged on the back of the cutting plate carrier, in which the input opening is arranged.

) 025] Such a circumferential groove simplifies the transfer of coolant and lubricant between

Machine tool or vortex unit and the vortex tool according to the invention even further. Because of the circumferential groove, the inlet opening of the coolant channel in this case need not be aligned exactly with a corresponding coolant transfer point on the machine tool or the vortex unit. The coolant and lubricant can enter at any point in the circumferential groove, and then pass through the groove to the inlet opening of the coolant channel.

) 026] According to a further embodiment of the present invention, the inlet opening is arranged on a circumferential circumferential surface of the cutting plate carrier.

) 027] Depending on the type of clamping of the swirling tool, this lateral surface can be used as an alternative coolant transfer point. This is particularly advantageous if the whirling tool is already clamped radially over this lateral surface in the whirling unit or the machine tool. The circumferential surface extending in the circumferential direction can, but does not necessarily have to, run parallel to the center axis of the insert carrier, ie orthogonally to the radial direction of the cutting plate carrier. ) 028] According to a further embodiment, at least a part of the coolant channel as

designed groove-shaped recess, which is arranged in one of the cutting plate receptacles and immediately adjacent to one of the cutting plates.

) 029] Thus, the coolant channel does not necessarily have to be designed in the form of a bore, but can also be designed as a groove or partially as a bore and partly as a groove. In one embodiment as a groove-shaped depression in or adjacent to the cutting tip holder, preferably an outer side of the adjacent cutting plate, which is arranged in the respective cutting tip holder, forms a part of the outlet opening. Said outer side of the cutting plate preferably forms not only a part of the outlet opening, but also a wall of the coolant channel. The coolant channel or at least a part thereof thus extends in this embodiment directly along an outer side of the cutting plate. This makes it possible to direct the coolant and lubricant even closer and more targeted in the area of cutting the cutting plates.

) 030] According to a further embodiment, the coolant channel has a first straight

Partial section which adjoins the outlet opening and runs along an imaginary line which intersects or touches the cutting edge, a rake surface or an open surface of one of the cutting plates.

) 031] The first section of the coolant channel and the outlet opening thereof are thus directed directly to the processing point on the workpiece. The imaginary line may, but need not, coincide with the symmetry axis of the first section of the coolant channel. Preferably, the imaginary line runs along the longitudinal axis of the first section of the coolant channel.

) 032] According to a further embodiment, the coolant channel has a first straight

Partial portion which is adjacent to the outlet opening and extends along an imaginary line which lies in a plane which is aligned orthogonal to the central axis of the cutting plate carrier. ) 033] The coolant and lubricant can in this way parallel to the top of the

Outlet plate carrier flow out of the outlet opening. This offers particular advantages in terms of chip removal.

) 034] According to a further embodiment, the coolant channel has a first straight

Subsection, which adjoins the outlet opening, and a second straight T eil portion, which adjoins the inlet opening, on, wherein the two subsections merge directly into each other and each other enclose an angle not equal to 0 °.

) 035] The coolant channel is designed angled in other words. This is

This is especially necessary in order to guide the coolant channel in the interior of the cutting plate carrier past the cutting plates to the desired point of the outlet opening. Instead of a curved coolant channel has an existing straight sections, angled coolant channel manufacturing advantages, since this is relatively easy to manufacture.

) 036] According to a further embodiment of the present invention, the cutting plate support on a connection flange and a radially projecting from the connecting flange head part, wherein the inlet opening, the outlet opening and the cutting plate recordings are arranged on the head part.

) 037] The coolant transfer from the machine tool or the vortex unit on the

Vortexing tool thus preferably takes place directly on the head part of the swirling tool, in which the cutting plates are arranged. Due to the radial projection of the head part with respect to the connection flange, the coolant channel can easily be accommodated in the head part, without having to change anything on the connection flange for this purpose.

) 038] It is understood that the above and the still to follow

explanatory features not only in the specified combination, but also in other combinations or in isolation, without departing from the scope of the present invention.

) 039] Embodiments of the whirling tool according to the invention are in the

The following drawings illustrate and are explained in more detail in the following description. Show it:

1 shows a perspective view of a first embodiment of the swirling tool according to the invention;

FIG. 2 is an exploded view of the embodiment shown in FIG. 1; FIG.

FIG. 3 is a rear perspective view of the embodiment shown in FIG. 1; FIG.

Fig. 4 is a rear elevational view of the embodiment shown in Fig. 1;

5 shows a semi-transparent front view of the embodiment shown in FIG. 1;

Fig. 6 is a sectional view indicated in Fig. 5;

7 is a perspective view of a second embodiment of the swirling tool according to the invention;

Fig. 8 is a side view of the embodiment shown in Fig. 7;

9 shows a semi-transparent front view of the embodiment shown in FIG. 7;

FIG. 10 is a sectional view indicated in FIG. 9; FIG.

1 is a perspective view of a third embodiment of the swirling tool according to the invention;

Fig. 12 is a rear elevational view of the embodiment shown in Fig. 11; 13 shows a semi-transparent front view of the embodiment shown in FIG. 11;

FIG. 14 is a sectional view indicated in FIG. 13; FIG.

15 shows a perspective view of a fourth embodiment of the swirling tool according to the invention;

Fig. 16 is a rear elevational view of the embodiment shown in Fig. 15;

17 is a semi-transparent front view of the embodiment shown in FIG. 15; and

Fig. 18 is a in Fig. 17 indicated sectional view.

) 040] Figs. 1-18 show four different embodiments of the invention

Whirling tool. The exemplary embodiments differ essentially in the design of an internal coolant channel, which is provided in the interior of the swirling tool. Furthermore, there are smaller structural differences between the exemplary embodiments, in particular with regard to the configuration of a connecting flange of the swirling tool, which, however, are not of primary importance in relation to the present invention.

) 041] The whirling tool according to the invention is shown in Fig. 1-18 in its entirety with the

Reference numeral 10 denotes.

) 042] The swirling tool 10 has a cutting plate carrier 12, on which several

Cutting plates 14 are releasably secured by means of fastening elements 16. The cutting plates 14 are preferably tungsten carbide inserts. The fastening screws 16 are preferably realized as clamping screws, which engage in corresponding threads which are provided in the cutting plate carrier 12. The clamping screws 16 are preferably provided with a Torx tool engagement or a Allen tool engagement, although in principle any types of tool interventions come into question. ) 043] Instead of clamping screws 16 could in principle also other types of

Fasteners are used. For example, one or more clamping elements could alternatively be used to clamp the cutting plates 14. It is also not necessarily necessary that a fastening element 16 is provided per insert 14. In general, only one fastening element for all cutting plates 14 could be used together.

) 044] The cutting plate carrier 12 is preferably made of steel. It can either be constructed in one piece (from a single integral component) or in several pieces (from a plurality of components that are detachably connected to one another). The cutting plate carrier 12 has two base regions or sections, a head part 18 and a connecting flange 20. Both sections are integrally connected to one another in the exemplary embodiment from FIG. The cutting plates 14 are arranged on the head part 18. For this purpose, the head part 18 of the cutting plate carrier 12 has a plurality of cutting plate receptacles 22 for receiving in each case one of the cutting plates 14. The cutting plate receptacles 22 are arranged distributed in the circumferential direction on the cutting plate carrier 12. The cutting plate receptacles 22 are preferably configured as recesses, wherein the individual recesses, which form the cutting plate receptacles 22, are separated from each other.

) Each of the cutting plate receptacles 22 has a bearing surface 24 on which the

respective cutting plate 14 rests flat. The bearing surfaces 24 of the various inserts recordings 22 are preferably coplanar with each other. The bearing surfaces 24 of the cutting plate receptacles 22 extend transversely, preferably orthogonally to the central axis 26 of the cutting plate carrier 12.

) 046] Transversely, preferably orthogonal to the bearing surfaces 24, each cutting plate holder 22 further comprises a plurality of contact surfaces 28, 30, 32a, 32b, on which the cutting plates 14 in the assembled state abut the cutting plate carrier 12. In the exemplary embodiment shown in FIGS. 1 and 2, the contact surfaces 28, 30 are aligned with one another at an acute angle. Also, the contact surfaces 32a, 32b are aligned in the embodiment shown here in each case at an acute angle to the contact surfaces 28, 30. The contact surfaces 32a, 32b, however, are coplanar to each other. In principle, instead of two partial contact surfaces 32a, 32b, a single, continuous contact surface 32 could also be provided at the same point per cutting tip holder 22.

) 047] The cutting plate carrier 12 is partially hollow. He has one in the middle

Through opening 34, which extends along the central axis 26 of the Schneidplatten- carrier 12. The passage opening 34 is preferably designed symmetrically to the central axis 26. The passage opening 34 is bounded by an inner wall 36 in the radial direction of the cutting plate carrier. This inner wall 36 preferably has a plurality of wall sections along the central axis 26, which are cylindrical or conical in the present exemplary embodiment. In principle, however, other shapes (not necessarily symmetrical shapes), e.g. a prismatic inner wall 36 of the passage opening 34, in question.

) 048] In the assembled state, the cutting plates 14 protrude with their in-use

Cutting 15 in the passage opening 34 of the cutting plate carrier 12 into it. The workpiece to be machined with the swirling tool 10 is usually inserted eccentrically into the passage opening 34 during machining, with the swirling tool 10 being rotated about the center axis 26 of the cutting board carrier 12. In the manufacture of a thread, the cutting plate carrier 12 is additionally pivoted relative to the workpiece by a predefined angle about an axis which is orthogonal to the central axis 26. The swivel angle is set in advance depending on the thread pitch to be produced and typically no longer changed during the production of the thread. While the cutting plate carrier 12 rotates, the workpiece is moved in its feed direction parallel to the central axis 26.

) 049] Should the cutting edges 15 of the cutting plates 14 in use become worn, the cutting plates 14 can be detached from the cutting plate carrier 12 and inserted in another position in order to continue processing with the next cutting edge 15. In the embodiment shown here, each cutting plate 14 has three cutting edges 15 each. Each of the cutting plates 14 can therefore be used in triplicate or arranged in three different positions on the cutting plate carrier 12. It goes without saying however, cutting inserts with fewer or more than three cutting edges can be used without departing from the scope of the present invention.

) 050] In the embodiments shown in FIGS. 1-18, the inventive

Whirling tool 10 each have a plurality of coolant channels 38, which are arranged in the cutting plate carrier 12. In the exemplary embodiments shown here, the same number of coolant channels 38 as cutting plates 14 are provided, wherein between each two adjacent cutting plates 14 as a respective coolant channel 38 is arranged. It should be noted at this point, however, that in principle would also meet one of these coolant channels 38, without departing from the scope of the present invention. Each of the coolant channels 38 extends between an inlet port 40 and an outlet port 42, wherein each of the coolant channels 38 preferably has its own inlet port 40 and its own outlet port 42. Common to all exemplary embodiments shown here is that the outlet openings 42 each open into the central passage opening 34 of the cutting plate carrier 12 and / or are aligned in the direction of this passage opening 34. The position of the inlet openings 40 as well as the type of guidance of the coolant channel 38 within the cutting plate carrier 12 is different from exemplary embodiment to exemplary embodiment in the exemplary embodiments shown here. This will be explained in more detail below.

In the first exemplary embodiment shown in FIGS. 1-6, the inlet openings 40 of the coolant channels 38 are each arranged on a rear side 44 of the cutting plate carrier (see FIG. 3). More specifically, the inlet openings 40 are arranged on the rear side 44 of the head part 18 of the cutting plate carrier 12. In the present case, the rear side 44 of the cutting board carrier 12 is the side of the cutting board carrier 12 facing away from the front side 46, which is shown in FIG. 1. The front side 46 is the side of the cutting plate carrier 12, on which the cutting plate receptacles 22 are arranged.

) 052] As can be seen in particular from FIGS. 3 and 4, the inlet openings 40 according to the first embodiment are arranged in a groove 48. This groove 48 is preferably designed as a circumferential groove extending in the circumferential direction. The main advantage of this groove 48 is that the swirling tool 10 in the circumferential direction relative to the tool holder in the machine tool does not have to be positioned exactly to ensure the coolant supply. Considered in the circumferential direction, the coolant can enter the groove 48 at any point and then passes along the groove 48 to the individual inlet openings 40 and thus into the individual coolant channels 38. It is understood that the groove 48 is not necessarily circular in shape for this purpose have to be. Likewise, two or more of these grooves 48 could also be provided, which cover individual circular segments, so that only one or two inlet openings are then arranged in each of these grooves.

) 053] The outlet openings 42 are according to the first embodiment on the inner wall

36 of the through hole 34 of the cutting plate carrier 12 is arranged. Each of these outlet openings 42 is arranged between two of the cutting plates 14, so that viewed in the circumferential direction alternately always a cutting plate 14, then an outlet opening 42 and then again an insert 14 on the cutting plate support 12 is arranged.

) 054] The coolant channels 38 each have two in the first embodiment

Subsections 50, 52 (see Figs. 5 and 6). Both sections 50, 52 are configured as straight (non-curved) sections. The first section 50 of each coolant channel 38 adjoins the outlet opening 42 of the respective coolant channel 38. The second section 52 of each coolant channel 38 adjoins the inlet opening 40 of the respective coolant channel 38. Both sections 50, 52 merge directly into one another. Compared with a curved / curved coolant channel, an angled coolant channel 38, which, as shown here, has two straight sections 50, 52, has the advantage that it is much easier to manufacture.

) 055] The first section 50 of each coolant channel adjoining the outlet opening 42

38 is preferably oriented such that the coolant exiting from the outlet openings 42 is directed as accurately as possible in the direction of the cutting areas of the cutting plates 14. This can be ensured in particular in that the first straight section 50 of each coolant channel is aligned in such a way that an imaginary line 58, which coincides with the central or symmetry axis of the section 50, is aligned. falls on the cutting edge 15, a rake surface 54 or one of the free surfaces 56 each one of the cutting plates 14 intersects or tangent (see Fig. 6).

In the exemplary embodiment shown in FIGS. 7-10, the inlet openings 40 of the individual coolant channels 38 are arranged not on the rear side 44 but on a circumferential surface 60 of the cutting plate carrier 12 running in the circumferential direction. This lateral surface 60 preferably runs parallel to the central axis 26 of the cutting plate carrier 12 and thus also orthogonal to the radial direction of the cutting plate carrier 12. However, the subdivision of the individual coolant channels 38 into two straight sections 50, 52 is similar to that in the first embodiment. Here, too, the first subsection 50 is preferably oriented such that the coolant is directed out of the outlet openings 42 in the direction of the cutting regions of the individual cutting plates 14. Accordingly, the position of the exhaust ports 42 is similarly selected as in the first embodiment. The second section 52 of each coolant channel 38 preferably extends in the radial direction of the cutting plate carrier.

In the third exemplary embodiment shown in FIGS. 11-14, the inlet openings 40 of the coolant channels 38 are again arranged on the rear side 44 of the cutting plate carrier 12 or on the rear side 44 of the head part 18. In contrast to the first embodiment shown in FIGS. 1-6, however, the inlet openings 40 are not arranged in a circumferential groove, but separated from each other. The coolant transfer between machine tool and whirling tool 10 thus takes place separately for each coolant channel 38. The arrangement of the outlet openings 42 is in turn similar to that according to the first two embodiments. Also, the division of the individual coolant channels 38 into two straight sections 50, 52 is similar to that explained above with reference to the first two embodiments. However, in this third exemplary embodiment, the first section 50 of each coolant channel 38 is aligned parallel to the front side 46 of the cutting plate carrier. In other words, the first section 50 of each coolant channel 38 runs along an imaginary line 62 lying in a plane 64 that is oriented orthogonally to the central axis 26 of the cutting insert carrier 12 (see FIG. 14). Otherwise, the third embodiment differs from the first two

Embodiments essentially by constructive differences, in particular with respect to the shape of the head portion 18 and the connecting flange 20. This is essentially because the whirling tool 10 according to the third Ausführungsbei- game slightly different in the machine tool or the vortex unit is attached.

In the head part 18 of the cutting plate carrier 12, for example, a plurality of fastening and positioning bores 66, 68 are provided for this purpose (see FIG. 13). The essential features of the present invention, however, remain unaffected.

In the fourth exemplary embodiment shown in FIGS. 15-18, the inlet openings 40 of the individual coolant channels 38 are again arranged in a circumferential groove 48 on the rear side 44 of the head part 18 of the cutting plate carrier 12, similar to the first exemplary embodiment. Each individual coolant channel 38 in turn consists of two straight sections 50, 52, which connect the inlet openings 40 with the respective outlet openings 42. The outlet openings 42 are arranged here again on the inner wall 36 of the passage opening 34. The essential difference from the exemplary embodiments described above is that the first section 50 of each coolant channel 38 in this exemplary embodiment is designed in each case as a groove-shaped recess 70. These groove-shaped recesses 70 are each disposed within or adjacent to one of the cutting plate receptacles 22. In this way, a coolant channel section which is open on one side and which is closed when the cutting plates 14 are inserted is formed, since an outer side 72 of each cutting plate 14 forms in each case a side wall of the first section 50 of each coolant channel 38. The first section 50 of each coolant channel 38 can thus run directly adjacent to the cutting plates 14 and along this. In this way, the coolant can get even closer and more targeted in the cutting area of the individual cutting plates 14.

) 060] In the outer sides 72 of the cutting plates 14, each having a side wall of the

The first portions 50 of the coolant channels 38 form, it does not necessarily have to be a side surface of the cutting plates 14, as shown in Fig. 15-18. The first section 50 can in principle also below the cutting plates 14th be provided and introduced into the bearing surface 24 of the individual inserts cutting 22.

) 061] Finally, it should also be mentioned that the outlet openings 42 of the coolant channels

38 need not necessarily be provided in the inner wall 36 of the passage opening 34. Essential to the invention is only that these outlet openings 42 are directed from the outside to the passage opening 34 in order to ensure a supply of coolant and lubricant in the cutting area of the cutting plates 14.

Claims

claims

A swirling tool (10) for machining a workpiece, comprising: a plurality of cutting plates (14), each of the cutting plates (14) having at least one cutting edge (15); a cutting plate carrier (12) with a plurality of cutting plate receptacles (22) for receiving and releasably securing each one of the cutting plates (14), wherein the cutting plate receptacles (22) in the circumferential direction over the cutting plate support (12) are arranged distributed the cutting plate carrier (12) has a through opening (34) running along a central axis (26) of the cutting plate carrier (12), through which the workpiece can be guided during processing, and wherein the cutting plates (14) in the assembled state into the passage opening (34) 34) protrude; and a coolant passage (38) disposed in the tip carrier (12) and extending between an inlet port (40) and an outlet port (42), the outlet port (42) opening into the port (34) and / or in the direction of the passage opening (34) is aligned.

2. Whirling tool according to claim 1, wherein the outlet opening (42) between two adjacent cutting plates (14) is arranged.

The swirling tool according to claim 1 or 2, wherein the passage opening (34) is bounded in the radial direction of the cutting plate carrier (12) by an inner wall (36) of the cutting plate carrier (12), wherein the outlet opening (42) is arranged on the inner wall (36) ,

4. Whirling tool according to one of claims 1-3, wherein the cutting plate recordings (22) on a transversely to the central axis (26) extending front side (46) of the cutting plate carrier (12) are arranged, and wherein the inlet opening (40) on a front side (46) opposite rear side (44) of the cutting plate carrier (12) is arranged, which also transversely to the center axis (26 ) runs.

5. Whirling tool according to claim 4, wherein on the back (44) of the Schneidplat- tenträgers (12) a circumferentially extending groove (48) is arranged, in which the inlet opening (40) is arranged.

6. Whirling tool according to one of claims 1-3, wherein the inlet opening (40) is arranged on a circumferential circumferential surface (60) of the Schneidplattenträ- gers (12).

7. Whirling tool according to claim 6, wherein the lateral surface (60) orthogonal to the radial direction of the cutting plate carrier (12).

8. Whirling tool according to one of claims 1-7, wherein at least a part of the coolant channel (38) is designed as a groove-shaped recess (70) which in one of the cutting plate receptacles (22) or adjacent to one of the cutting plates Receivers (22) is arranged and directly adjacent to one of the cutting plates (14).

A swirling tool according to claim 8, wherein an outer side (72) of the adjacent cutting plate (14) forms part of the outlet opening (42).

A swirling tool according to any one of claims 1-9, wherein the coolant channel (38) has a first straight section (50) adjacent to the outlet opening (42) and extending along an imaginary line (58, 62) which guides the cutting edge (42). 15), a rake surface (54) or an open surface (56) of one of the cutting plates (14) cuts or tangent.

A whirling tool according to any one of claims 1-10, wherein the coolant channel (38) has a first straight section (50) adjacent to the outlet opening (42) and extending along an imaginary line (62) which is in a plane (Fig. 64) oriented orthogonal to the central axis (26) of the die carrier (12).

12. Whirling tool according to one of claims 1-1 1, wherein the coolant channel (38) has a first straight section (50), which adjoins the outlet opening (42), and a second straight section (52), which on the inlet - (40) adjacent, has, wherein the two subsections (50, 52) directly into each other and enclose an angle not equal to 0 °.

13. Whirling tool according to one of claims 1 to 12, wherein the cutting plate carrier (12) has a connecting flange (20) and a radially projecting from the connecting flange (20) head portion (18), wherein the inlet opening (40), the Auslassöff- tion ( 42) and the cutting-plate receptacles (22) are arranged on the head part (18).

14. Whirling tool according to one of claims 1-13, wherein the swirling tool (10) has a plurality of the coolant channels (38), wherein the number of coolant channels (38) corresponds to the number of cutting plates (14), and each of the coolant channels (38) in Cutting plate carrier (12) is arranged and extending between in each case an inlet opening (40) and in each case an outlet opening (42), between each two adjacent cutting plates (14) each one of the Auslassöff- openings (42) is arranged.