EP2681000A1

EP2681000A1 - Die stock

Info

Publication number: EP2681000A1
Application number: EP12707523.2A
Authority: EP
Inventors: Matthias Luik
Original assignee: Hartmetall Werkzeugfabrik Paul Horn GmbH
Current assignee: Hartmetall Werkzeugfabrik Paul Horn GmbH
Priority date: 2011-03-02
Filing date: 2012-02-29
Publication date: 2014-01-08
Also published as: DE102011013789B3; WO2012117033A1; US20140017020A1

Abstract

The present invention relates to a die stock and also to a holder and cutting insert for such a die stock. There is proposed a die stock (1) having a holder (2) in the form of a circular ring with receiving grooves (24) that are provided on the inner circumference (23) and extend in the axial direction, said receiving grooves (24) having a receiving groove profile for receiving in each case one cutting insert; a plurality of cutting inserts (3) arranged in in each case one receiving groove (24) in the holder (2), wherein each cutting insert (3) has at least one cutting edge (33) on a cutting face (32) directed towards the central holder longitudinal axis (4) and has a holding profile on the opposite holding face (31), wherein the receiving groove profile of the receiving grooves (24) and the holding profile of the cutting inserts (3) interact with one another such that a cutting insert (3) is guided in the axial direction (z) when inserted into its receiving groove(24) and is clamped in the radial direction (r) in the fully inserted state; and a holding means (51, 52) per cutting insert (3) in order to axially fix the end side of each cutting insert (3) in the receiving groove (24).

Description

die stock

The present invention relates to a cutting blade and a holder and a cutting insert for such a cutting blade.

Cutting blades, often referred to as die, are widely used for cutting production of external threads and are known in various configurations. In one embodiment, cutting blades are made in one piece as HSS (High Speed Steel) tool. Although these are inexpensive to produce, they are limited in their performance and ineffective. due to low cutting data. Furthermore, if a cutting edge is damaged, the entire cutting blade must be replaced. Furthermore, cutting blades are known, which are made entirely of hard metal as a one-piece tool. These offer better performance, but are very expensive and expensive to manufacture. In addition, cutting blades are known with cutting inserts. However, these basically have fewer cutting inserts than the abovementioned HSS cutting blades and carbide cutting blades due to the installation space conditions. In addition, they provide, due to the required space for inserting the cutting inserts, unfavorable stability of the tool.

The present invention has for its object to provide a cutting blade and a holder and a cutting insert for such a cutting blade, which combine all or as many advantages of the known designs of cutting blades in itself.

The object is achieved by a cutting blade with:

an annular holder with attached to the inner circumference, extending in the axial direction receiving grooves with a Aufnahmutprofil for receiving a deicing each Schnei, more in each receiving groove of the holder arranged cutting inserts, each cutting insert at a directed to the central holder longitudinal cutting surface at least one cutting edge and on the opposite lying holding surface having a holding profile, wherein the receiving groove profile of the grooves and the holding profile of the cutting inserts cooperate with each other such that a cutting insert is guided when inserted into its receiving groove in the axial direction and is clamped in the fully inserted state in the radial direction, and

a holding means per cutting insert for the axial end-side fixing of the respective cutting insert in the receiving groove. Furthermore, the object is achieved with respect to the holder, wherein:

the holder is designed annular,

having on the inner circumference, extending in the axial direction receiving grooves having a Aufnahmutprofil for receiving one of a plurality of each in a recording enut of the holder arranged cutting inserts, each cutting insert on a central holder longitudinal axis directed cutting surface at least one cutting edge and on the opposite holding surface a holding profile having,

wherein the receiving groove profile of the grooves with a holding profile of the cutting inserts cooperates with each other such that a cutting insert is guided in the insertion in its receiving groove in the axial direction and clamped in the fully inserted state in the radial direction and is fixed axially frontally by means of a holding means.

Further, a cutting insert according to the invention is provided for a cutting assembly according to the invention, wherein the cutting blade an annular holder mounted on the inner circumference, extending in the axial direction receiving grooves having a Aufnahmutprofil for receiving a respective cutting insert and a holding means per cutting insert for axially fixing the end face of the respective cutting insert in the receiving groove, wherein the cutting insert:

has at least one cutting edge on a cutting surface facing the central holder longitudinal axis, and

on the opposite holding surface has a holding profile, wherein the receiving groove profile of the grooves and the holding profile of the cutting inserts cooperate with each other such that a cutting insert is guided when inserted into its receiving groove in the axial direction and is clamped in the fully inserted state in the radial direction. In the cutting blade according to the invention a good stability is achieved in that the cutting inserts are guided and held in a ring. Preferably, the annular holder is made of HSS or other steel, while the cutting inserts are made of hard metal. The cutting inserts are seated in corresponding receiving grooves which are mounted on the inner circumference of the holder. The leadership and support of the cutting inserts in the respective grooves of the holder can be done differently, each ensuring that a guide of the cutting insert in the axial direction when inserting into its receiving groove and that is clamped after insertion of the cutting insert in the radial direction to a exact positioning and thus a high machining accuracy to achieve.

The cutting inserts are in the cutting blade according to the invention thus introduced from an end face of the holder ago in the axial direction, ie parallel to the holder longitudinal axis, in the corresponding grooves and are not, as in known cutting blades, configured via a ring as a one-piece element. They are also not mounted in the radial direction from the inside of the holder forth on the holder or columnar holder elements. As a result, more cutting inserts can be attached to the holder with the same footprint compared to known cutting blades with changeable cutting inserts.

Overall, the cutting blade according to the invention, the holder according to the invention and the cutting insert according to the invention combine the advantages of the different embodiments of known cutting blades. Since the holder per se can be made of simple steel in principle, the manufacturing cost is significantly lower than a one-piece cutting body, which is made entirely of hard metal. When a cutting insert is damaged, it is sufficient to replace only this single cutting insert, which is also easily possible with the cutting unit according to the invention, without the holder having to be partially disassembled and / or other cutting inserts removed or even exchanged. Furthermore, the cutting blade according to the invention offers high machining accuracy and high stability. It is preferably provided that the cutting inserts are designed identical. This leads to a further cost reduction, since it is not necessary to produce different types of cutting inserts and to provide them to the user. Since in such a case for the use of the cutting blade for tapping the cutting inserts in principle can not be positioned identically in the axial direction, further axial positioning means are preferably provided for the axial positioning of the cutting inserts in the respective receiving groove. Such Axialpositionierungsmittel may for example be spacers that can be inserted into the grooves before the respective cutting insert is used. These spacers may either be fixed to the holder or be replaceable, so that the axial positioning of the individual cutting inserts can also be varied, for example when cutting inserts are exchanged to produce a thread with a different pitch or a different number of threads.

In a further embodiment, the invention provides that the holder comprises:

a first retaining ring, on which the receiving grooves are mounted continuously, and

a second retaining ring which is detachably connected to the first retaining ring and which has on its first retaining ring facing end as Axialpositionierungsmittel receiving recesses which correspond in number and positions with the number and positions of the receiving grooves of the first retaining ring and for supporting and positioning the respective cutting insert used in its receiving groove are provided in the axial direction.

In this embodiment, the axial positioning of the individual cutting inserts is thus determined by the depth of the receiving recesses in the second retaining ring, and it is also conceivable that in addition to this receiving recesses appropriate spacer elements can be inserted if necessary. Alternatively, it is provided in one embodiment that the holder is designed as a one-piece retaining ring and that the axial length of the receiving grooves is configured differently to the desired axial positioning of the cutting inserts. However, this represents a higher production cost. Also in this solution, appropriate spacers can be used in the grooves if necessary.

Although it is advantageous that the cutting inserts are designed identically. Alternatively, however, it is also conceivable that the axial positioning of the cutting inserts is determined by the respective length of the cutting inserts in the axial direction, wherein the receiving grooves then preferably have an identical axial length. Of course, in this embodiment of the cutting inserts, the receiving grooves may be designed to have different lengths, or the holder may be configured in two parts as described above with a first retaining ring and a second retaining ring. Furthermore, spacer elements can also be used in this case.

In a further embodiment, it is provided that on the front side of the holder from which the cutting inserts are inserted into the respective receiving groove per receiving enut a mounting recess is arranged, which opens into the receiving groove in the radial direction and to which in axial direction of a threaded hole connects to receive a respective clamping screw for axial clamping of the respective cutting insert in the receiving groove. As a result, on the one hand axial clamping of the cutting insert is achieved in the respective receiving groove. Furthermore, it can be achieved that over the front side of the holder, are introduced from the cutting inserts into the respective receiving groove, no holding or clamping elements for fixing the cutting inserts, so that the cutting blade work until the stop plan by the front side of the holder can. Namely, the fastening recesses are preferably designed such that the holding means including clamping screw are received therein and possibly form a flat surface with the end face of the holder or at least do not protrude beyond. Advantageously, the invention further provides that the cutting inserts in the region of the holding surface, which is touched in the inserted state of the respective holding means for fixing, a projection, into which engages the holding means. As a result, both a secure axial and radial clamping of the cutting insert can be effected.

Further, it is preferably provided that the holding means per cutting insert a clamping screw and engaging the cutting insert clamping plate, wherein the clamping plate and attacked by her clamping surface of the projection in the same way obliquely to the holder longitudinal axis, so that the cutting insert in the Fixation is pulled by the retaining means in the radial direction into the receiving groove. Such a configuration contributes to a further increase in the radial and axial fixation of the cutting insert in its receiving groove.

In a further development it is provided that in the inserted state of a cutting insert supported on a support surface of the holder bearing surface of the cutting insert and the support surface of the holder in the same way obliquely to the holder longitudinal axis, so that the cutting insert in the fixation by the holding means in the radial Direction is pulled into the receiving groove into it. This measure also helps to fix the cutting insert as firmly as possible in the receiving groove.

In principle, the leadership and fixation can be done differently. In one embodiment, it is provided by way of example that the receiving groove profile and the holding profile have a (in particular wedge-shaped) cross section, which becomes increasingly narrower as the distance from the holder longitudinal axis increases. But it is also reversed wedge shapes or cylindrical cross-sectional shapes basically used. In other embodiments, it is provided that the receiving groove profile and the holding profile have a cross-sectional profile, which after Type of rail, a tongue and groove or a toothing interact with each other.

The number of cutting edges on the cutting inserts can be selected depending on the application. In some applications, one cutting edge per cutting insert is sufficient. However, thread cutting often uses cutting inserts with a variety of cutting edges. The cutting edges themselves can all be designed identically, but they can also be configured differently in order to achieve the desired cutting action in successive steps through the different cutting edges.

The invention will be explained in more detail with reference to the drawing. Show it:

Fig. 1 is a front perspective view of an inventive

die stock,

2 is an exploded view of a cutting blade according to the invention,

Fig. 3 is a front perspective view and rear view of a first

Retaining rings of the cutting blade according to the invention,

4 is a front perspective view of a second retaining ring of the cutting blade according to the invention,

Fig. 5 different views of a cutting insert according to the invention of the cutting blade according to the invention and

Fig. 6 is a sectional view through a part of an inventive

Die stock. 2 shows an exploded view of this cutting blade 1. This cutting blade 1 has an annular holder 2, which is formed in the embodiment shown two retaining rings 21, 71, in principle but also can be integrally formed. On this holder 2 are on the inner circumference 23, 73 a plurality of (in this embodiment, five) cutting inserts 3 are mounted, which are each arranged in a formed in the axial direction z in the holder 2 receiving groove 24. These receiving grooves 24 have a corresponding receiving groove profile, which corresponds to a correspondingly designed holding profile (here a V-profile, which is formed by opposite holding surfaces 31 and an intermediate radius 30) on the rear longitudinal side of the cutting inserts 3, so that a cutting insert. 3 in the corresponding receiving groove when inserted in the axial direction z is guided and is clamped in the fully inserted state in the radial direction r.

At the holding profile 30, 31 opposite longitudinal side of the cutting inserts 3 each have a cutting surface 32 is provided, the at least one cutting edge 33, in this case a plurality of cutting, have. These cutting edges 33 are directed to the central holder longitudinal axis 4 in the assembled cutting blade 1, as shown in FIG. 1, so that a workpiece (not shown) arranged along the holder longitudinal axis 4, for example a pipe or a rod, can be machined, for example, to attach an external thread.

For the axial end-side fixing of the respective cutting insert 3 in the associated receiving groove 24 of the holder suitable holding means 5 are provided. These holding means are formed in the embodiment shown by a clamping plate 51 and a clamping screw 52. The clamping plate 51 has a central bore, through which the clamping screw 52 can be screwed into a bore 25 running on the first retaining ring 21 in the z-direction and having an internal thread. In the upper end face 26 of the first retaining ring 21, corresponding fastening recesses 27 are provided for receiving the clamping plate 51. see, each open in the radial direction in the receiving groove 24 and in the bottom of said threaded bore 25 is introduced.

As can be seen in particular from Fig. 2, the cutting inserts 3 on its outwardly directed longitudinal side on a projection 34 into which the clamping plate 51 engages with its inwardly directed bottom 53 to the cutting insert 3 radially and axially fix. Preferably, both the clamping plate 51 and its inwardly directed bottom 53, and attacked by her clamping surface 35 of the projection 34 in the same way obliquely to the holder longitudinal axis 4, so that the cutting insert 3 in the fixation by the clamping plate 51 in the radial direction r is pulled into the receiving groove 24.

From Fig. 2 can also be seen that the two retaining rings 21, 71 of the holder 2 are screwed together in the present embodiment by screws 6, which through holes 72 in the second retaining ring 71 into corresponding threaded holes on the second retaining ring 71st to be directed end face 29 of the first retaining ring 21 are screwed. Further, one or more pins 6 'may be provided for connection and fixation of the ring in the holder.

Further, in the embodiment shown, a plurality of retaining holes 75 are mounted on the outer periphery of the second retaining ring 71, by means of which the cutting blade can be held in a (not shown) cutting tool holder, a machine tool or otherwise.

FIG. 3 shows various views of the first retaining ring 21, namely a front perspective view (FIG. 3A) and a rear perspective view (FIG. 3B). In the rear view there are also the threaded holes 25 can be seen, in which the clamping screws 52 are screwed (from the front end side 26) for fixing the clamping plates 51 in the respective mounting recess 27. It should be noted, however, that these threaded bores 25 do not have to be designed continuously to the lower end face 29. Furthermore, the fastening to recognize holes 72, in which the fastening screws 6 screwed to screw the two retaining rings 21, 71 and the pin 6 'are inserted.

Fig. 4 shows a front perspective view of the second retaining ring 71 of the cutting blade according to the invention 1. It can be clearly seen that the lowermost part of the receiving groove 24 is not continuous through the second retaining ring 71, but each formed as a receiving recess 74, wherein These of course correspond in number and position with the number and positions of the grooves 24 of the first retaining ring 21. These receiving recesses 74 are designed so that the associated cutting insert 3 is supported in the inserted state with its underside thereon in the axial direction and the cutting insert 3 positioned in the axial direction.

For this positioning, the receiving recesses 74, for example, different depths in the second retaining ring 71, viewed from the upper end face 76, be introduced. Alternatively or additionally, corresponding spacers 77 (such a spacer element is indicated in Fig. 4 in a receiving recess 74) are used for this purpose, which can be inserted into the respective receiving recess 74 before the respective cutting insert 3 is used. Such Axialpositionierungsmittel are particularly provided when the cutting inserts 3 all have an identical length, since the cutting inserts 3 are usually arranged slightly offset from one another in the axial direction for producing a thread. The differently deep introduced receiving recesses 74 are the simplest way of fixed axial positioning. However, if the cutting inserts 3 should be replaced, for example, to produce a thread with a different pitch or at all with a different thread, in addition, the spacers 77 described can be used.

At the bottom of the receiving recess, a plane supporting surface or one or two (as shown in FIG. surfaces 78, 79 may be arranged, which are provided for supporting the cutting insert 3 and adapted to the corresponding contact surface of the cutting insert 3.

Alternatively, instead different second retaining rings 71 are provided with differently deep designed receiving recesses 74, which then cause an altered axial positioning of the cutting inserts 3. In this case, in addition to a single first retaining ring 21, the user can be provided with a set of differently configured second retaining rings 71 and different sets of cutting inserts 3 if this cutting blade is to be used to produce different threads. Of course, in each case also conceivable that the cutting inserts 3 can vary widely in the interior of the cutting blade in order to edit different workpieces.

Alternatively, of course, is also conceivable that only a single second retaining ring 71 is provided with equally deep designed receiving recesses 74 and that the axial positioning of the various cutting inserts is provided by differently long designed cutting inserts, so that the respective length of the individual cutting inserts their axial Position determined.

5 shows a cutting insert 3 according to the invention of the cutting blade 1 according to the invention in different views, namely in a first perspective side view of a first longitudinal side A (FIG. 5A), a second perspective side view of the first longitudinal side 3A (FIG. 5B) Top view of the upper end face 3B (Fig. 5C) and a side view of the second longitudinal side 3C (Fig. 5D). As can be seen in particular from FIG. 5, the holding surfaces 31 together with the radius 30 form a holding profile which has a cross section which narrows as the distance from the holder longitudinal axis 4, that is to say from the cutting surface 32, increases. The receiving groove profile of the receiving grooves 24 (see Fig. 3A, 3B) is designed accordingly, so that the receiving groove 24 provides an axial guide for the cutting insert 3 when inserted into its receiving groove 24. Especially For this purpose, the cross section of the holding profile is wedge-shaped, as can be seen in Fig. 5C.

But there are of course other cross-sectional profiles for the Aufnahmutprofil and the holding profile conceivable, for example, cross-sectional profiles which cooperate with each other in the manner of a rail, a tongue and groove or teeth and cause the axial guidance of the cutting insert 3 in its receiving groove 24. The cross-sectional profiles can also be designed so that even without attachment of the cutting insert by means of holding the cutting insert during insertion can no longer fall out of the receiving groove in the radial direction.

As can be seen in particular from Fig. 5D, the base 35 of the projection 34 is slightly oblique, that is not exactly at an angle of 90 ° to the vertical contact surface 36 of the projection, but at a slightly smaller angle than 90 ° (for example in the range between 60 ° and 89 °). At this inclined base 35 engages the bottom 53 of the clamping plate 51 which extends in a similar or the same way obliquely to the holder longitudinal axis 4. This causes the cutting insert 3 in the fixation by the clamping means, so if the clamping plate 51 is screwed by means of the clamping screw 52 firmly against the cutting insert 3, that the cutting insert 3 is pressed not only in the axial direction in the receiving groove 24, but that he is also drawn in the radial direction in the receiving groove 24.

Furthermore, it can be seen in particular from Fig. 5D that the contact surface 3D of the cutting insert 3, which extends into the receiving groove 24 of the second retaining ring 71 when inserted cutting insert, obliquely to the support surfaces 31 and thus also obliquely to the holder longitudinal axis 4, for example at an angle between holding surfaces 31 and contact surface 3D in the range of 0 ° to 60 °, preferably in the range between 15 ° and 45 °. In the same or similar manner, the corresponding support surface 79 (see Fig. 4) at the bottom of the receiving recess 74 formed obliquely. This causes the cutting insert is drawn in the radial direction in the receiving groove 24 during fixing by the holding means, which additionally helps to fix the cutting insert 3 as firmly as possible and reliable in the receiving groove 24.

Fig. 6 shows a cross section through a part of the cutting blade according to the invention. There, the position of a cutting insert 3 in the receiving groove 24 and the receiving recess 74 and the fixation means of the clamping plate 51 and the clamping screw 52 can be seen. In particular, it can be seen how the inwardly directed, obliquely extending underside 53 of the clamping plate 51 acts on the likewise inclined clamping surface 35 of the cutting insert 3 and fixes the cutting insert 3 in the radial direction. At the same time thereby the cutting insert 3 is fixed in the axial direction.

It is understood that the present invention is not limited to the embodiment shown in the figures and explained above. Numerous variants are conceivable without departing from the scope of the present invention. The individual features shown and described can also be combined with each other in other combinations. In particular, the number and basic design of the cutting inserts for the present invention does not play a significant role. Depending on the application, they can be selected accordingly.

The cutting blade according to the invention allows a simple and quick replacement of individual or all cutting inserts. The cutting inserts are each reliably guided and positioned in both the axial and in the radial direction, whereby a desired high machining accuracy is achieved. Furthermore, preferably only the cutting inserts made of hard metal, while the holder itself can be made of less expensive steel.

Claims

claims

1. cutting clip (1) with:

an annular holder (2) having on the inner circumference (23) mounted, extending in the axial direction receiving grooves (24) having a receiving groove profile for receiving a respective cutting insert, a plurality of in each case a receiving groove (24) of the holder (2) arranged cutting inserts (3), wherein each cutting insert (3) on a central holder longitudinal axis (4) directed cutting surface (32) at least one cutting edge (33) and on the opposite holding surface (31) has a holding profile, wherein the receiving groove profile of the receiving grooves (24) and the holding profile of Cutting inserts (3) cooperate with each other such that a cutting insert (3) when inserted into its receiving groove (24) in the axial direction (z) is guided and clamped in the fully inserted state in the radial direction (r), and

a holding means (51, 52) per cutting insert (3) for the axial end-side fixing of the respective cutting insert (3) in the receiving groove (24).

2. Cutting blade according to claim 1,

characterized in that the cutting inserts (3) are designed identically.

3. Cutting blade according to claim 2,

characterized in that the holder (2) Axialpositionierungsmittel (77, 78, 79) for axially positioning the cutting inserts (3) in the respective receiving groove (24).

4. Cutting blade according to claim 3, characterized in that the Axialpositionierungsmittel have spacer elements (77) which can be inserted into the receiving grooves (24) before the respective cutting insert (3) is used.

5. Cutting blade according to claim 3 or 4,

characterized in that the holder (2) comprises:

a first retaining ring (21) on which the receiving grooves (24) are mounted continuously, and

a second retaining ring (71), which is releasably connected to the first retaining ring (21) and at its the first retaining ring (71) facing end face (76) as Axialpositionierungsmittel receiving recesses (74) with respect to the number and positions with the number and correspond to the positions of the receiving grooves (24) of the first retaining ring (21) and which are provided for supporting and positioning the respective cutting insert (3) inserted in its receiving groove (24) in the axial direction (z).

6. cutting blade according to claim 1,

characterized in that the axial positioning of the cutting inserts by the respective length of the cutting inserts (3) in the axial direction (z) is determined.

7. Cutting blade according to claim 6, characterized in that the receiving grooves (24) have an identical axial length.

8. Cutting blade according to one of the preceding claims,

characterized in that on the end face (26) of the holder (2) from which the cutting inserts (3) in the respective receiving groove (24) are introduced, each receiving groove (24) has a fastening recess (27) is arranged in radial direction (r) in the receiving groove (24) opens and to which in the axial direction (z) a threaded bore (25) connects to receive a respective clamping screw (52) for axial clamping of the respective cutting insert (3) in the receiving groove (24).

9. Cutting blade according to one of the preceding claims,

characterized in that the cutting inserts (3) in the region of the holding surface (31), which is touched in the inserted state by the respective holding means (51) for fixing, have a projection (34) into which the holding means (51) engages.

10. Cutting blade according to claim 9,

characterized in that the holding means per cutting insert (3) has a clamping screw (52) and a clamping plate (51) acting on the cutting insert (3), the clamping plate (51) and the clamping surface (35) of the projection (34 ) extend in the same way obliquely to the holder longitudinal axis, so that the cutting insert (3) in the fixation by the holding means (51) in the radial direction (r) in the receiving groove (24) is pulled into it.

11. Cutting blade according to one of the preceding claims,

characterized in that in the inserted state of a cutting insert (3) to a support surface (78) of the holder (2) supported contact surface (3D) of the cutting insert (3) and the support surface (78) of the holder (2) in the same way obliquely to Holder longitudinal axis (4) extend, so that the cutting insert (3) in the fixation by the holding means (51) in the radial direction in the receiving groove (24) is pulled into it.

12. Cutting blade according to one of the preceding claims,

characterized in that the receiving groove profile and the holding profile has a particular wedge-shaped cross-section, which becomes increasingly narrow with increasing distance from the holder longitudinal axis (4). Cutting blade according to one of claims 1 to 11,

characterized in that the receiving groove profile and the holding profile have a cross-sectional profile which cooperate with each other in the manner of a rail, a groove and tongue or a toothing.

Cutting blade according to one of the preceding claims,

characterized in that the cutting inserts (3) each have a plurality of in the axial direction (z) juxtaposed cutting edges (33).

A holder (2) for a cutting clip (1) according to claim 1, wherein:

the holder (2) is annular in shape,

on the inner circumference (23) mounted in the axial direction (z) extending receiving grooves (24) having a receiving groove profile for receiving in each case one of a plurality of in each receiving groove (24) of the holder (2) arranged cutting inserts (3), each cutting insert ( 3) has at least one cutting edge (33) on a cutting surface (32) facing the central holder longitudinal axis (4) and a holding profile on the opposite holding surface (31),

wherein the receiving groove profile of the receiving grooves (24) cooperates with a holding profile of the cutting inserts (3) such that a cutting insert (3) when inserted into its receiving groove (24) in the axial direction (z) is guided and in the fully inserted state in the radial direction (R) is clamped and fixed by means of a holding means (51, 52) axially frontally.

Cutting insert for a cutting blade (1) according to claim 1, wherein the cutting blade (1) has an annular holder (2) mounted on the inner circumference (23) in the axial direction (z) receiving grooves (24) having a receiving groove profile for receiving a respective cutting insert (3) and a holding means (51, 52) per cutting insert (3) for axially fixing the respective end of the respective cutting insert (3) in the receiving groove (24), wherein the cutting insert (3): has at least one cutting edge (33) on a cutting surface (32) facing the central holder longitudinal axis (4), and

on the opposite holding surface (31) has a holding profile, wherein the receiving groove profile of the receiving grooves (24) and the holding profile of the cutting inserts (3) cooperate with each other such that a cutting insert (3) when inserted into its receiving groove (24) in the axial direction ( z) is guided and in the fully inserted state in the radial direction (r) is clamped.