Side milling cutter

Abstract

The side milling cutter (100) comprises a body (10) extending from a first end (11) along a given rotation axis (R) and having an interface for rotationally driving connection to a free second end (12), on which a seating surface (14) for a disk-shaped cutter holder (20) is configured, fixed to the second end (12) and supported by a first main surface (21) facing the body (10), on which the disk-shaped cutter holder (20) is configured, the outer periphery of which projects radially from the body (10) and has a central through opening (23) passing axially through the disk-shaped cutter holder (20). A plurality of coolant supply channels (60) for feeding coolant to the second end (12) of the body (10) are configured in the disk-shaped cutter holder (20). A plurality of coolant distribution channels (50) for feeding coolant to the outer periphery of the cutter holder (20) are formed in the disk-shaped cutter holder (20).

Description

[Technical field]

[0001] The invention relates to a side milling cutter comprising a body extending along a given axis of rotation from a first end having an interface for connection to a rotary drive to a free second end configured with a seat for a disc-shaped cutter holder, and a disc-shaped cutter holder fastened to the second end. [Background technology]

[0002] To produce grooves or slits in workpieces and cut mainly metallic materials, side milling cutters are often used, in which a disk-shaped cutter holder is arranged on a body adapted for coupling to a rotary drive, on whose circumference a number of cutters are distributed. In this case, the cutters can in particular be formed by cutter inserts, which are held in corresponding seats in the cutter holder and are typically made of a harder and more wear-resistant material than the body and the disk-shaped cutter holder. For example, the body and the disk-shaped cutter holder can be made of tool steel, and the cutters can be made of superhard metal, cermet, ceramic or superhard material, such as for example PCD (polycrystalline diamond) or CBN (cubic boron nitride).

[0003] The patent document 1 describes a side milling cutter with a body and a disk-shaped cutter holder fixed thereto, in which a number of coolant supply channels are formed, each of which leads to an elongated coolant distribution chamber at the end, through which the coolant is transported to a number of inlet openings of the disk-shaped cutter holder, respectively. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] German Utility Model No. 202017105606 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE DISCLOSURE It is an object of the present invention to provide an improved side milling cutter which has improved coolant supply to the cutter and which offers increased design freedom in relation to the configuration of the disk-shaped cutter holder.

[0006] Whenever the terms axial, radial or tangential are used in the following specification, these terms are intended to relate to the axis of rotation of the respective side milling cutter, unless a different meaning arises from the particular context. [Means for solving the problem]

[0007] This problem is solved by a side milling cutter according to claim 1. Advantageous embodiments are set forth in the dependent claims.

[0008] The side milling cutter has a body extending along a given rotation axis from a first end with an interface for connection to a rotary drive to a free second end and forming a seating surface for a disk-shaped cutter holder, and a disk-shaped cutter holder fastened to the second end and supported on the seating surface with a first main surface facing the body, the disk-shaped cutter holder having a central through opening projecting radially from the body at its periphery and passing through in the axial direction. The body is formed with a plurality of coolant supply channels for supplying coolant to the second end of the body. The disk-shaped cutter holder is formed with a plurality of coolant distribution channels for supplying coolant to the periphery of the cutter holder. At least two of the plurality of coolant distribution channels branch off from a common coolant distribution chamber, which distribution chamber is formed between the body and the disk-shaped cutter holder, and at least two of the plurality of coolant supply channels open into this distribution chamber.

[0009] Due to the provision of a common coolant distribution chamber into which at least two of the plurality of coolant supply channels open, the coolant can be reliably supplied to the outer circumference of the cutter holder, even when the coolant supply channels are clogged with contaminants, for example. Due to the provision of a central through-opening axially through the disk-shaped cutter holder, the side milling cutter can be configured as a plug-in side milling cutter, which can be fastened by a central fastening screw from its free second end to a rotary drive, to which it is connected via an interface configured at its first end. Advantageously, all of the coolant supply channels of the plurality of coolant supply channels can open into one common coolant distribution chamber, and all of the coolant distribution channels of the cutter holder can branch off from one common coolant distribution chamber.

[0010] According to another embodiment, the common coolant distribution chamber extends annularly about the axis of rotation, in which case a particularly homogeneous distribution of the coolant to all coolant distribution channels is achieved.

[0011] According to another embodiment, the coolant distribution channels each have a first channel section running inside the cutter holder, closed both on the side of the first main surface of the cutter holder and on the side of the second main surface opposite to this first main surface, lying opposite the first main surface of the cutter holder and having at least one outlet opening on the outer circumference of the cutter holder, and an inlet section opening towards the through opening and towards the first main surface and extending over only a part of the thickness of the cutter holder in the region of the through opening. In this case, a relatively large cross section can be provided through the inlet section for transporting the coolant into the disk-shaped cutter holder, so that the flow resistance can be kept low.

[0012] According to another embodiment, the coolant distribution channels each have a connection connecting the inlet section to the first channel section, which connection is of a closed configuration in the direction of the through opening and with respect to the second main face. Due to the connections being provided, the axial height of the inlet section opening towards the through opening can be selected to be only a relatively small part of the axial length of the through opening, so that the remaining part of the axial length of the through opening is available for sealing against undesired coolant leakage.

[0013] If the axial height of the inlet opening towards the through opening is at most one third of the thickness of the disk-shaped cutter holder at the through opening, it is possible to reliably seal against undesired leakage of coolant through the remaining majority of the axial height of the through opening. The thickness of the cutter holder at the through opening can correspond, for example, to the thickness of the cutter holder in the seat area of ​​the cutter insert. In particular if the cutter holder is of stepped construction in the area of ​​the through opening, so that the area of ​​the first main surface that is supported on the seat surface is constructed as a protrusion or as a recess, the thickness of the cutter holder at the through opening will be different from the thickness of the cutter holder at its periphery.

[0014] According to another embodiment, the coolant distribution chamber has a cutter holder-side portion formed by a recess in the disk-shaped cutter holder adjacent to the first main surface and the through-openings and extending between the inlets of each coolant distribution channel, in which case a uniform distribution of the coolant on the circumference of the cutter holder can be achieved and overall a large flow cross section for the inflow of the coolant into the coolant distribution channels can be provided.

[0015] If the axial height of the coolant distribution chamber on the cutter holder side is a maximum of one-third of the thickness of the disk-shaped cutter holder at the through opening, it is ensured that the axial height of the through opening remains sufficient in the circumferential area to reliably seal against undesirable coolant leakage even in the circumferential area where the recesses of the cutter holder part of the coolant distribution chamber are formed.

[0016] The axial height of the cutter holder side portion of the coolant distribution chamber, i.e. the axial height of the recess, preferably corresponds approximately to the axial height of the inlet portion, and preferably corresponds approximately to the axial height of the coolant distribution channel opening into the through opening.

[0017] According to another embodiment, a centering pin protruding axially from the seating surface is formed at the second end of the body, and the through-opening of the cutter holder is adapted to the outer contour of the centering pin, the interaction of which reliably prevents undesired coolant leakage.

[0018] According to another embodiment, a through hole, which is open at the second end, extends through the centering pin. In this case, the fixing of the side milling cutter to the rotary drive can be performed simply by accessing the through hole starting from the second end. Engagement in the through hole can be performed, for example, by a screwing tool.

[0019] The inner circumferential surface of the through opening of the cutter holder preferably abuts in a sealing manner against the outer circumferential surface of the centering pin, which reliably prevents undesired leakage of coolant. The inner circumferential surface of the through opening and the outer circumferential surface of the centering pin can, for example, be ground in order to enable a hermetic fit. The inner circumferential surface of the through opening and the outer circumferential surface of the centering pin are preferably rotationally symmetrical about the axis of rotation. The outer circumferential surfaces of the centering pin and the inner circumferential surface of the through opening can, for example, be conical, the inner circumferential surface being preferably hollow cylindrical, whereas the outer circumferential surface can be correspondingly cylindrical, which allows a particularly simple and inexpensive manufacture.

[0020] According to another embodiment, the coolant supply channels open radially on the outside of the centering pin into a common coolant distribution chamber, which can be constructed in a particularly simple and inexpensive manner so that the flow resistance is minimized and the coolant is distributed uniformly over the entire circumference.

[0021] According to another embodiment, the coolant distribution chamber has a first body side with a groove running around the centering pin and deepening towards the seating surface, in which case a sufficient cross section of the coolant distribution chamber can be provided in a particularly simple and inexpensive manner and a uniform distribution of the coolant is achieved over the entire circumference of the centering pin.

[0022] According to another embodiment, the coolant distribution chamber has a second body side formed via a circumferential recess formed in the centering pin. In this case, the cross section of the coolant distribution chamber can be enlarged in a particularly simple manner, so that the flow resistance can be kept low. The recess is preferably configured in the area between the sealing circumference and the seat surface of the centering pin for the disk-shaped cutter holder.

[0023] According to another embodiment, the cutter holder has a number of seats distributed over the circumference of the disk-shaped cutter holder for receiving exchangeable cutter inserts, in which case the cutter holder can be manufactured inexpensively, for example from tool steel, and only the cutter inserts with the cutters that come into contact with the workpiece to be machined have to be made from a particularly hard and wear-resistant material, for example carbide (hard metal).

[0024] According to another embodiment, the seat is configured to receive interchangeable cutter inserts each protruding axially on both sides from a disk-shaped cutter holder, in which case a relatively narrow slit can also be configured through the side milling cutter and / or the cutting of the material can be performed with a relatively small slit width.

[0025] In the case where the side milling cutter has a plurality of replaceable cutter inserts fixed to the seat and forming that area of ​​the side milling cutter that protrudes most axially from the body, the groove can also be configured in the recess, for example very close to the bottom of the recess.

[0026] Further advantages and suitability of the invention will become apparent on the basis of the following description of an embodiment with reference to the attached drawings. [Brief description of the drawings]

[0027]

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[0028] One embodiment of a side milling cutter is described in more detail below with reference to Figures 1-21.

[0029] In a particular embodiment, the side milling cutter 100 is configured as a so-called mounted side milling cutter for end-mounting on a rotary drive of a machining tool.

[0030] The side milling cutter 100 comprises a body 10, shown in particular in FIGS. 4, 5 and 6, and a disk-shaped cutter holder 20, shown in particular in FIGS.

[0031] The body 10 extends along a given rotation axis R from a first end 11 to a free second end 12, as shown in particular in Fig. 5. An interface for connecting to a rotary drive is formed at the first end 11. In a specific embodiment, two recesses 13 are formed at the first end 11 to interact with corresponding drive mechanisms on the rotary drive for torque transmission.

[0032] At the free second end 12 of the body 10, a seating surface 14 for supporting a disk-shaped cutter holder 20 is formed. The seating surface 14 is formed in this embodiment by a flat end side of the annular configuration of the body 10 and extends in a plane perpendicular to the axis of rotation R.

[0033] Beginning at the second end 12 of the body 10, the seat surface 14 is provided with a number of threaded holes 15 for receiving fastening screws 30 for fastening the disc-shaped cutter holder 20 to the body 10. In the illustrated embodiment, a total of four threaded holes 15 and four fastening screws 30 are provided, although the number of fastening screws 30 and threaded holes 15 may be less than four or greater than four.

[0034] A centering pin 16 is formed at the second end 12 of the body 10 and projects axially relative to the seating surface 14, the function of which will be described in more detail below. As can be seen particularly in Figures 3 and 5, the centering pin 16 has a cylindrical outer peripheral surface 16a.

[0035] As can be seen in particular in FIG. 5, a through hole 17 is formed in the body 10 and extends along the rotation axis R from the second end 12 to the first end 11. The through hole 17 also extends in particular through the centering pin 16 and is open at the second end 12. The through hole 17 is configured to receive a fastening means (not shown) by means of which the side milling cutter 100 can be fastened to a rotary drive via its interface provided at the first end 11. The inner wall of the through hole 17 is in particular of stepped configuration and is provided with a shoulder 17a, which extends substantially perpendicular to the rotation axis R and on which the fastening means can be sealingly supported, for fastening the side milling cutter 100 to the rotary drive. Here, the action of the fastening means can be initiated from the free second end 12 of the body 10 or from the side milling cutter 100.

[0036] The disk-shaped cutter holder 20 will be described in more detail below. In particular, as shown in FIGS. 1 to 3, FIGS. 7 and 8, the disk-shaped cutter holder 20 has a relatively thin disk shape having a first main surface 21 and a second main surface 22 parallel thereto. In the assembled state of the side milling cutter 100, the first main surface 21 and the second main surface 22 each extend perpendicular to the rotation axis R. The first main surface 21 is formed to face the main body 10 and is configured to be supported by the seating surface 14 via an annular region. The annular region can be, for example, preferably configured as a flat surface together with the rest of the first main surface 21. However, with respect to the annular region, it is also possible to form a stepped configuration as a protrusion with respect to the remaining portion of the first main surface 21. The second main surface 22 is disposed so as to face away from the main body 10. The thickness of the disk-shaped cutter holder 20 and the axial height of the centering pin 16 are adapted to each other such that, in the assembled state of the side milling cutter 100 as particularly shown in FIGS. 1 and 2, the centering pin 16 does not protrude toward the end side and rather is substantially flush with the second main surface 22 of the cutter holder 20.

[0037] As can be particularly seen from FIGS. 7 and 8, a through-opening 23 penetrating the cutter holder 20 from the second main surface 22 toward the first main surface 21 is formed at the center of the cutter holder 20. This through-opening 23 extends coaxially with the rotation axis R and has an inner peripheral surface 23a that precisely conforms to the shape of the outer peripheral surface 16a of the centering pin 16. In this embodiment, the inner peripheral surface 23a has a hollow cylindrical shape. The inner peripheral surface 23a of the cutter holder 20 and the outer peripheral surface 16a of the centering pin 16 are adapted to each other such that they are in a sealed state with respect to the coolant, which will be described in more detail below.

[0038] In the radial direction outside the through-opening 23, a hole 24 for accommodating the clamping screw 30 is formed in the cutter holder 20 as particularly shown in FIGS. 7 and 8. As particularly shown in FIG. 8, the hole 24 has a bevel shape so as to be adjacent to the second main surface 22, and as a result, the head of the clamping screw 30 does not protrude from the second main surface 22 in the mounted state shown in FIGS. 1 and 2.

[0039] The cutter holder 20 projects radially from the body 10 and has a substantially larger outer diameter than the body 10. A plurality of seats 25 for receiving replaceable cutter inserts 40 are arranged distributed around the circumference of the cutter holder 20, as shown in particular in FIG. 1. Although in this embodiment a total of eight seats 25 are shown with cutter inserts 40 arranged thereon, for example fewer or more than eight seats 25 can be provided. The number of seats can vary, depending in particular on the outer diameter of the cutter holder 20, for example. The seats 25 are arranged such that the cutter inserts 40 arranged thereon project radially from the cutter holder 20 with their cutting edges 41.

[0040] In this embodiment, the seat 25 is configured such that the cutting edges 41 of the cutter insert 40 protrude axially on both sides from the cutter holder 20, i.e., axially beyond the second main surface 22 and axially beyond the first main surface 21, as shown in Fig. 12. Here, the width of the cutting edges in the axial direction is between 1.5 mm and 12 mm, preferably between 2 mm and 10 mm. The thickness of the cutter holder 20, i.e. the distance between the first main surface 21 and the second main surface 22, is somewhat smaller than the width of the cutting edges (e.g. in the range of 1 / 10 of a millimeter), so that sufficient free movement is ensured.

[0041] The cutting edge 41 forms the most axially protruding area of ​​the entire side milling cutter 100 at the second end 22 .

[0042] In this embodiment, the replaceable cutter insert 40 is held on the seat 25 via resiliently deflectable clamping fingers formed within the material of the cutter holder 20. Adjacent the seat 25, a chip groove 26 is formed on the outer periphery of the cutter holder 20, as shown particularly in Figures 7 and 8.

[0043] The side milling cutter 100 of this embodiment has an internal coolant supply structure intended for supplying coolant to the region of the seat 25. The coolant supply structure is configured in such a way that a coolant outlet is provided which is assigned to each seat 25 or to the cutter insert 40 attached thereto. The configuration of the internal coolant supply structure is explained in more detail below.

[0044] First, the coolant distribution channel 50 formed in the disk-shaped cutter holder 20 will be described in detail with reference to Figs.

[0045] A plurality of individual coolant distribution channels 50 are formed in the cutter holder 20. In this embodiment, the number of coolant distribution channels 50 corresponds to the number of seats 25 on the replaceable cutter insert 40 such that each seat 25 is assigned an individual coolant distribution channel 50.

[0046] In this embodiment, each coolant distribution channel 50 has an outlet opening 51 at the outer periphery of the cutter holder 20, through which the coolant leaking therefrom can be supplied to the seat 25 or to the region of the cutter insert 40 arranged therein. In this embodiment, the outlet openings 51 are respectively arranged in the region of the deepest part of the chip groove 26, but other embodiments are possible. For example, the outlet openings 51 can be arranged closer to the cutting surface of the respective cutter insert 40 or adjacent to the open surface of the respective cutter insert 40. In the illustrated embodiment, each coolant distribution channel 50 has only one outlet opening 51, but for example the coolant distribution channels 50 can also branch and have several outlet openings 51, each of which, for example, has an outlet opening oriented towards the cutting surface and an outlet opening oriented towards the open surface.

[0047] The coolant distribution channels 50 in the cutter holder 20 each have a first channel portion 52 running inside the cutter holder 20 toward an outlet opening 51, as shown particularly in Figure 8. The first channel portion 52 runs inside the cutter holder 20 so as to be closed on both the side of the first main surface 21 and the side of the opposing second main surface 22. The first channel portion 52 is preferably formed at least approximately centrally between the first main surface 21 and the second main surface 22 of the cutter holder 20.

[0048] As can be seen in particular from the detailed view of FIG. 10, which is an enlarged view of the encircling circle E of FIG. 9. The coolant distribution channels 50 each have an inlet section 53 in the radially inner region of the cutter holder 20, which inlet section 53 opens onto the first main face 21 and onto the through opening 23. Starting from the first main face 21 of the cutter holder 20, the inlet section 53 extends only over a part of the thickness of the cutter holder 20 in the region of the through opening 23, in particular over at most one third of the thickness of the disk-shaped cutter holder 20 at the through opening 23. In other words, the axial height of the inlet section 53 is at most one third of the thickness of the cutter holder 20 at the through opening 23. The inlet section 53 can be formed, for example, by cutting starting from the first main face 21 and the through opening 23.

[0049] As can be seen in particular in Figures 10 and 12, the inlet section 53 is connected to the first channel section 52 via its connecting section 54. The connecting section 54 can be constituted, for example, by a transverse hole, starting in particular from the first main face 21, which connects the inlet section 53, which opens into the first main face 21, to the first channel section 52, which is located inside the cutter holder 20. The connecting section 54 is closed against the second main face 22 and in the direction of the through-opening 23, so that the inner peripheral surface 23a, which seals against the outer peripheral surface 16a of the centering projection 16, extends in the region of the inlet section 53 over at least two-thirds of the thickness of the cutter holder 20. These features can also be seen in particular in the cross-section in the region of the inlet section 53 in Figure 12.

[0050] 10 and 12, between the respective adjacent inlet sections 53 of the adjacent coolant distribution channels 50, recesses 55 are formed in contact with the first main surface 21 and the through openings 23, the function of which will be described in more detail later. In this embodiment, the recesses 55 are formed by chamfered or beveled surfaces respectively connecting the adjacent inlet sections 53. In this way, the recesses 55 can be particularly simply produced by circumferential chamfering before or after the formation of the inlet sections 53. In the thickness direction of the cutter holder 20, the recesses 55 also extend over a maximum of 1 / 3 of the thickness of the cutter holder 20 in the region of the through openings 23, so that the sealing inner circumferential surface 23a also extends in the region of the recesses 55 over at least 2 / 3 of the thickness of the cutter holder 20.

[0051] The body 10 defines a plurality of coolant supply channels 60, the structure of which will be described in more detail below with reference to Figures 4, 5 and 6. Although a total of eight coolant supply channels 60 are shown in this embodiment, corresponding to the number of coolant distribution channels 50 in the cutter holder 20, the number of coolant supply channels 60 may also be more or less than eight, and need not specifically match the number of coolant distribution channels 50 or the number of seats 25 on the cutter holder 20.

[0052] As can be seen in particular in Figure 5, in the illustrated embodiment the coolant supply channels 60 start from the through-holes 17 and branch off, via which the coolant is supplied starting from the side of the rotary drive. As can be seen in particular in Figures 4 and 5, the coolant supply channels 60 lead into the second end of the body 10 radially outside the centering pin 16 and radially inside the position of the threaded holes 15. Here, the openings of the coolant supply channels 60 are arranged annularly around the circumference of the centering pin 16, i.e. the openings are arranged in a region that extends annularly around the centering pin 16.

[0053] In the annular region into which the coolant supply channel 60 opens, a groove 61 is formed in the circumferential direction around the centering pin 16, which is deeper than the seating surface 14, as shown in particular in Figures 4 and 6. The groove 61 is configured in this embodiment as a hollow which deepens on the seating surface 14 in the direction of the centering pin 16, i.e. radially inwards, which allows a particularly simple manufacture. However, other shapes of the annular circumferential groove 61 are also possible.

[0054] 6, the centering pin 16 is provided with a circumferential recess 62 in the region between the outer circumferential surface 16a and the annular groove 61 formed in the seating surface 14, so that the circumference of the centering pin 16 is locally reduced in this region. In other words, this circumferential recess 62 forms an annular recess on the region of the centering pin 16 adjacent the seating surface 14.

[0055] The interaction between the main body 10 and the cutter holder 20 that forms an internal coolant supply structure will be described below with reference to Figs.

[0056] When the cutter holder 20 is fastened to the body 10, the region of the first main surface 21 of the cutter holder 20 abuts against the seat surface 14 of the body 10, and the outer peripheral surface 16a of the centering pin 16 closely abuts against the inner peripheral surface 23a of the through opening 23. As can be seen by combining the figures, Figs. 15, 18 and 21 each show a detailed view of a section at a different point in the circumferential direction in a cross-sectional view of a plane including the rotation axis R. Fig. 15 shows a partial detailed cross-sectional view of a region where the coolant supply channel 60 is not open and where the inlet portion 53 of the coolant distribution channel 50 does not exist. Fig. 18 shows a detailed view of a section in the region where the inlet portion 53 of the coolant distribution channel 50 is arranged. Fig. 21 shows a detailed cross-sectional view of a region where the coolant supply channel 60 is open.

[0057] As can be seen from figures 15, 18 and 21, a coolant distribution chamber 70 is formed in the area between the body 10 and the cutter holder 20. The coolant distribution chamber 70 is formed by the interaction of an annular groove 61 in the seating surface 14, a circumferential recess 62 in the centering pin 16 and a recess 55 in the cutter holder 20. This common coolant distribution chamber 70 thus extends annularly around the axis of rotation R or the centering pin 16. The common coolant distribution chamber 70 consequently has a cutter holder-side part formed by the recess 55 on the cutter holder 20. The groove 61, which is deepened relative to the seating surface 14, forms a first body-side part of the common coolant distribution chamber 70. The circumferential recess 62 in the centering pin 16 forms a second body-side part of the common coolant distribution chamber 70.

[0058] As shown in Figure 21, the coolant supply channels 60 each open into a common coolant distribution chamber 70 formed in this region by the recesses 62, the grooves 61 and the recesses 55. The coolant can then be distributed circumferentially through the coolant distribution chamber 70, as shown in Figure 15. In the region where the inlet portions 53 of each coolant distribution channel 50 are located, the coolant can then enter each coolant distribution channel 50 from the common coolant distribution chamber 70, as shown in Figure 18.

[0059] During operation of the side milling cutter 100, the coolant is fed from the first end 11 of the body 10 through the through holes 17 into the coolant feed channels 60. An axial end-side escape of the coolant at the second end 12 through the through holes 17 is prevented via fastening means (not shown) received internally for the body on the rotary drive. Via the coolant feed channels 60, the coolant is fed into a common coolant distribution chamber 70 and distributed circumferentially through the latter into the respective coolant distribution channels 50. An end-side escape of the coolant at the second end 12 between the centering pin 16 and the through openings 23 is prevented by the inner circumferential surface 23a of the through openings 23 sealing against the corresponding outer circumferential surface 16a of the centering pin 16. Via the coolant distribution channels 50 in the cutter holder 20, the coolant is directed in a targeted manner into the area of ​​the respective seats 25.

[0060] Due to the annular configuration of the common coolant distribution chamber 70 and the fact that this distribution chamber is arranged radially inside the threaded bores 15 and the fastening screws 30, the circumferential distribution of the through openings 23 of the inlets 53 of the coolant distribution channels 50 is independent of the number and distribution of the openings of the coolant supply channels 60 on the circumference of the centering pin 16. In this way, several cutter holders 20 can be used on the same body 10, which differ from one another, for example, in terms of their outer diameter and / or the number of seats 25 and coolant distribution channels 50.

[0061] 22 and 23 show a variation of a cutter holder which can also be used with the main body 10 described above.

[0062] 22 and 23, the modified cutter holder 20' differs from the cutter holder 20 described above in that it has a greater number of seats 25 with cutter inserts 40 fastened thereto and a corresponding greater number of coolant distribution channels 50. Since the cutter holder 20' does not otherwise differ from the cutter holder 20 described above, the same reference numerals are used and a detailed description of the individual features of the cutter holder will not be repeated.

[0063] Due to the annular configuration of the common coolant distribution chamber 70, the cutter holder 20' according to this variant can be easily adapted to the body 10 to ensure that the cutter insert 40 is supplied with coolant.

[0064] Although an embodiment has been described in which the common coolant distribution chamber 70 has both the cutter holder side (recess 55), the first body side (groove 61) and the second body side (recess 62) which provides a particularly satisfactory coolant distribution whilst allowing for simple manufacture, it is possible to provide, for example, only one of these or only one of these, and again the coolant could be distributed circumferentially.

Claims

1. a main body (10) extending along a predetermined rotation axis (R) from a first end (11) having an interface for connecting to a rotation drive mechanism to a free second end (12), and having a seat (14) for a disk-shaped cutter holder (20); the disk-shaped cutter holder (20) fastened to the second end (12), supported by the seat surface (14) at a first main surface (21) facing the body (10), the outer periphery of which protrudes radially from the body (10), and having a central through opening (23) passing through in the axial direction; A side milling cutter (100) comprising: a plurality of coolant supply channels (60) formed in the body (10) for supplying coolant to the second end (12) of the body (10); The disk-shaped cutter holder (20) is formed with a plurality of coolant distribution channels (50) for supplying coolant to the outer periphery of the disk-shaped cutter holder (20); At least two of the plurality of coolant distribution channels (50) branch off from a common coolant distribution chamber (70; 55, 61, 62) formed between the body (10) and the disk-shaped cutter holder (20); said common coolant distribution chamber (70; 55, 61, 62) being located between an inner peripheral surface (23a) in sealing contact with a cylindrical outer peripheral surface (16a) on one side and said seat surface (14) of said body (10) on the other side; At least two of the plurality of coolant supply channels (60) open into the common coolant distribution chamber (70; 55, 61, 62); each of the plurality of coolant distribution channels (50) having a first channel portion (52) running within the interior of the disk-shaped cutter holder (20); The first channel portion (52) is formed by being closed at a surface on a first main surface (21) side of the disk-shaped cutter holder (20) and a surface on a second main surface (22) side opposite to the first main surface (21), the disk-shaped cutter holder (20) has at least one outlet opening (51) at its outer periphery and an inlet portion (53) opening towards the central through-opening (23) and the first main surface (21) and extending only part of the thickness of the disk-shaped cutter holder (20) in the region of the central through-opening (23); Side milling cutter.

2. 2. Side milling cutter according to claim 1, wherein said common coolant distribution chamber (70; 55, 61, 62) extends annularly about the axis of rotation (R).

3. 3. The side milling cutter according to claim 1 or 2, wherein each of the plurality of coolant distribution channels (50) has a connection portion (54) connecting the inlet portion (53) to the first channel portion (52), the connection portion (54) being in a closed arrangement in the direction of the central through opening (23) and with respect to the second main surface (22).

4. 4. A side milling cutter according to claim 1, wherein the axial height of the inlet portion (53) opening towards the central through-opening (23) is at most one-third of the thickness of the disk-shaped cutter holder (20) at the central through-opening (23).

5. 5. A side milling cutter according to claim 1, wherein a portion of the common coolant distribution chamber (70; 55, 61, 62) on the disk-shaped cutter holder (20) side is formed by a recess (55) in the disk-shaped cutter holder (20) adjacent to the first main surface (21) and the central through opening (23) and extending between the inlet portions (53) of each of the plurality of coolant distribution channels (50).

6. 6. The side milling cutter according to claim 5, wherein the axial height of the part of the common coolant distribution chamber (70; 55, 61, 62) on the side of the disk-shaped cutter holder (20) is at most one third of the thickness of the disk-shaped cutter holder (20) at the central through-opening (23).

7. 7. A side milling cutter according to claim 1, further comprising a centering pin (16) arranged at the second end (12) of the body (10) and projecting axially from the seating surface (14), the central through opening (23) in the disk-shaped cutter holder (20) being adapted to the outer contour of the centering pin (16).

8. 8. A side milling cutter according to claim 7, comprising a through hole (17) passing through said centering pin (16) and opening into said second end (12).

9. 9. A side milling cutter according to claim 7 or 8, wherein an inner circumferential surface (23a) of the central through opening (23) of the disk-shaped cutter holder (20) tightly abuts against an outer circumferential surface (16a) of the centering pin (16).

10. 10. Side milling cutter according to any one of claims 7 to 9, wherein the plurality of coolant supply channels (60) open radially into the common coolant distribution chamber (70; 55, 61, 62) radially outside the centering pin (16).

11. 11. A side milling cutter according to any one of claims 7 to 10, wherein the common coolant distribution chamber (70; 55, 61, 62) has a first body side portion formed by a groove (61) recessed around the periphery of the centering pin (16) relative to the seat surface (14).

12. 12. Side milling cutter according to any one of claims 7 to 11, wherein the common coolant distribution chamber (70; 55, 61, 62) has a second body side portion formed by a circumferential recess (62) formed in the centering pin (16).

13. 13. A side milling cutter according to any one of the preceding claims, comprising a plurality of seats (25) distributed around the circumference of the disc-shaped cutter holder (20) for receiving exchangeable cutter inserts (40).

14. 14. The side milling cutter according to claim 13, wherein the seat (25) is configured to receive replaceable cutter inserts (40) protruding axially from the disk-shaped cutter holder (20) on both sides, respectively.

15. 15. Side milling cutter according to claim 13 or 14, comprising a plurality of replaceable cutter inserts (40) fastened to the seats (25) and forming an area of ​​the side milling cutter protruding axially furthest from the body (10).

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