Milling tool and method for manufacturing such a milling tool

Abstract

This invention relates to a milling tool (1) for cutting and processing wood or woody materials and a method for manufacturing such a milling tool (1). A longitudinal direction (3), a radial direction (4), and a rotational direction (5) are predetermined by the rotation axis (2) of the milling tool (1). The milling tool (1) includes a base (6) and at least one cutting edge (7) adjacent to a cutting surface (8) pointing forward along the rotational direction (5) and a free surface (9) pointing outward along the radial direction (4). The cutting edge (7) and the cutting surface (8) extend curvedly along the longitudinal direction (3). The curved cutting edge (7) and the curved cutting surface (8) are constructed on a cutting insert (10) separately constructed from the base (6). The cutting insert (10) is fixed to, and in particular welded to, the flat support surface (21) of the base (6) with its flat inner surface (20).

Description

Technical Field

[0001] The present invention relates to a milling tool for cutting and machining wood or woody materials and a method for manufacturing such a milling tool. Background Technology

[0002] A milling tool of this type, in the form of an end mill, is known from DE 10 2005 020 513 B3. This end mill has two concave curved cutting edges and corresponding concave curved cutting surfaces. The two individual cutting edges extend continuously and uninterruptedly over the entire cutting length. This milling tool is particularly useful for machining insert materials made of wood or woody materials such as particleboard or fiberboard with or without coating. The concave curved cutting edges generate cutting forces on both surfaces of the insert material, which are directed inwards towards the workpiece and thus prevent wear on the cutting edges.

[0003] The milling tool shown is implemented as a single piece, comprising the base, shank, and cutting edge. In such a monolithic tool, the material selection is determined by the requirements for the cutting edge. Therefore, if, for example, a hard metal cutting edge is desired to achieve a long service life, the end mill's entire shank is made of flat hard metal. While such a tool can achieve good cutting quality and a long service life, it also suffers from various disadvantages. The shaping of the shank or base, including the cutting groove, is costly. Concave cutting edges can only be economically manufactured using rotating manufacturing tools (milling cutters, grinding wheels). The concavity of the cutting surface is determined by the minimum possible diameter of the manufacturing tool. Expensive hard metal is also used in areas far from the cutting edge where its material properties are neither necessary nor even obstructive. The shank made of hard metal is susceptible to fracture and does not possess superior damping characteristics. In summary, such a tool is expensive. Using harder cutting materials, such as PKD (polycrystalline diamond), is not feasible in the aforementioned monolithic design under current conditions.

[0004] Furthermore, it is known, of course, that the possibility of material selection can be expanded by using individual cutting inserts. The shank and body of the end mill can, for example, be made of tool steel, with carbide or PKD inserts then welded on. This configuration is known, for example, by WO 2012 / 163338 A1, in which the tool body provides an insert holder and cutting space for each cutting insert. The flat insert holder is upright, i.e., approximately radial to the axis of rotation or transverse to the cutting direction. The associated cutting insert is welded to the upright insert holder with its flat rear side, such that its opposite flat front side forms an equally flat cutting surface.

[0005] In this structure, there is no known economically viable solution for a single cutting blade extending along the entire cutting length, consisting of a single cutting edge with a curved cutting edge and a cutting face orientation. Therefore, the cutting blade, which is flat in its basic shape, must be concavely machined on its initially flat front side while still in the welded state. Because this front side is a full-surface PKD layer, this very hard and also very expensive material must be removed in large quantities. On the one hand, this would presuppose a corresponding thickness of the PKD layer, and on the other hand, it is practically impossible to implement due to the cost.

[0006] Therefore, for the application scenario mentioned at the beginning, the combination of a concave curved cutting edge and a concave curved cutting surface disclosed in DE 10 2005 020 513 B3 is approximated in the structural form according to WO 2012 / 163338 A1 by multiple rows of individual, flat cutting inserts. For this purpose, the flat cutting inserts are inclined at an axial or tilt angle relative to the longitudinal direction of the tool with their flat cutting surfaces. The cutting surfaces of the cutting inserts positioned near the shank are inclined towards the end of the free tool, while the cutting surfaces of the cutting inserts positioned near the end of the free tool are inclined towards the shank. In other words, the end-side cutting inserts face each other. This produces the same effect as in the direction of a continuously curved cutting edge during workpiece machining, resulting in a cutting force pointing inwards towards the workpiece on both surfaces of the insert material.

[0007] However, such a structure also has drawbacks: for each of the numerous cutting inserts, the cutting space and insert holder must be milled into the tool body. The high material removal rate, besides resulting in high costs, also weakens the core of the tool body. Therefore, high-quality, only difficult-to-machine material must be used for the tool body. Disadvantages are also noticeable during operation: especially in milling tools with small flight circle diameters, the dissipation of heat generated during cutting is limited. This can further limit the performance of the milling tool, as the brazed connection between the cutting insert and the tool body may otherwise be thermally damaged or even lead to so-called "weld desoldering." Summary of the Invention

[0008] The object of the present invention is a milling tool for cutting and processing wood or woody materials, configured to be driven rotatably about a rotation axis, wherein the longitudinal direction, radial direction and rotation direction are predetermined by the rotation axis, the milling tool includes a base and at least one cutting edge arranged around the periphery of the base, wherein the cutting edge is adjacent to a cutting surface pointing forward in the rotation direction and a free surface pointing outward in the radial direction, and wherein the cutting edge and the cutting surface extend curvedly in the longitudinal direction, wherein the curved cutting edge and the curved cutting surface are constructed on a cutting insert separately constructed from the base, wherein the cutting insert has a flat inner surface facing radially inward toward the base opposite to the free surface, wherein a flat support surface corresponding to the flat inner surface is constructed on the base, and wherein the cutting insert is fixed to the flat support surface of the base with its flat inner surface. This improvement makes it possible to use a cutting edge with a curved cutting edge direction and a curved cutting surface by simple means, without the above limitations in integral tools or tools with separate cutting inserts.

[0009] This objective is achieved by a milling tool having the features of the present invention.

[0010] Furthermore, the object of the present invention is to provide a method for manufacturing such a milling tool.

[0011] This objective is achieved by a method having the features of the present invention.

[0012] This invention is based on a multi-piece structure design having a base and a cutting blade fixed thereon. The cutting blade is made from a flat blank and has a curved cutting edge and a curved cutting surface while maintaining a flat basic shape. The flat surface of the blank serves as the inner surface of the cutting blade, which, in the installed state, faces the radially external free face and radially inward toward the base.

[0013] Correspondingly, a flat support surface is formed on the substrate as a blade holder, wherein the cutting blade is fixed with its flat inner surface and, in particular, welded to the flat support surface of the substrate.

[0014] The design according to the invention provides the possibility of using individual cutting blades with very low cost, even when a curved extension of the cutting edge and cutting face is desired. The curved shape is not created on the finished tool, but rather before the individual cutting blades are manufactured. Since the curved cutting face extends through the cross-section of the raw material or composite blank, especially guided by controlled cutting via laser, erosion, or the like, it is sufficient for shaping the raw material or composite blank without having to remove large amounts of very hard blade material in a complex process. Because the flat surface of the blade material is not placed forward on the cutting face in the direction of rotation when loaded, but rather radially inward on the radially outward-pointing support surface of the substrate serving as the blade holder, a correspondingly narrow blade strip can be used. This allows for a correspondingly high number of cutting blades from existing blanks of specific geometries and sizes with low material consumption. Expensive blade material is used in a cost-effective manner. Because the shaping of the curved cutting face is not performed on the finished tool using a grinding or erosion disc, but rather during separation from the blank, arbitrary contour directions can be achieved. Therefore, it is feasible to produce irregular or multi-curved cutting surfaces, as well as cutting surfaces in the form of curved polygonal lines, in addition to the arc segments.

[0015] Tool bodies preferably made of different materials, especially steel, are also simpler to manufacture than in the case of integral tools. The cutting edge geometry does not need to be considered during manufacturing, allowing for arbitrary formation of the cutting space, insert holder, etc. Furthermore, the material chosen for the base body possesses good operating characteristics, such as impact toughness and damping, in addition to easy machinability. In particular, the main radially outward bearing surface of the base body, rather than a forward bearing surface along the rotational direction, results in relatively less material needing to be removed from the base blank during manufacturing. Besides reduced manufacturing costs, this primarily results in a larger cross-section of material in the base body compared to existing technologies, which has a higher mechanical and thermal load-bearing capacity because the remaining material cross-section is loaded with less mechanical stress and can also dissipate more heat.

[0016] The advantages of the invention are particularly evident in its structural form, wherein the milling tool has a milling section having a cutting length and a diameter, wherein the cutting length is greater than half the diameter and particularly greater than the diameter, and / or wherein the cutting blade has a blade length and a thickness, wherein the blade length is greater than the thickness, and / or wherein the milling tool has a milling section with a cutting length, wherein the at least one cutting edge extends along the entire cutting length, and / or wherein the at least one cutting edge extends between two endpoints, wherein the endpoints are located on a line parallel to the longitudinal direction. Regarding all these features, the difficulties mentioned at the beginning arise in the prior art, which are overcome by the design scheme according to the invention.

[0017] The cutting blades used according to the invention can be integral, for example, made of hard metal or monolithic diamond. In an advantageous improvement, they are made from a composite preform comprising a carrier layer, particularly a carrier layer made of hard metal, and a hard layer applied thereon, particularly a PKD layer, PVD layer, or CVD layer. This cuts out a flat cutting blade such that the free surface is formed by the hard layer, the inner surface opposite the free surface is formed by the carrier layer, and the curved cutting surface is formed by a cut through the composite preform. The cutting blade thus prepared is fixed to a support surface of the substrate with its carrier layer pointing radially inward, such that the PKD layer is located radially outside the carrier layer, i.e., radially outward, and forms the free surface thereon. Here, the curved cutting surface is machined by means of a cross section depicting the corresponding curvature. Thus, although a flat preform is used, the curvature of the cutting edge and the cutting surface is produced by the curved cutting direction, not by the entire hard layer, but by the cross section of the composite material, i.e., by the cross section of the hard layer and the carrier layer below it, being considered for forming the cutting surface.

[0018] In a preferred embodiment, the cutting edge and cutting surface extend in a curved manner, while the opposing contact surface along the direction of rotation is constructed flat. In this case, the corresponding support surface on the blade holder of the substrate is correspondingly implemented flat in the same manner, which simplifies the manufacturing process.

[0019] In a favorable alternative, the contact surface is curved in the same direction as the cutting surface. Specifically, the cutting blade has a constant width between the cutting surface and the contact surface. Consequently, each individual cutting blade also has a very narrow structure in its end region, resulting in low material consumption. In manufacturing, multiple cutting blades in such a cutting blade configuration can be nested together from the blank with minimal space requirements, thus achieving a correspondingly high yield. Attached Figure Description

[0020] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0021] Figure 1 A perspective view of a milling tool according to an embodiment of the present invention is shown. Taking an end mill as an example, the end mill has two PKD cutting inserts, the PKD layers of which point radially outward and their cutting edges have a curved orientation relative to the cutting surface.

[0022] Figure 2 It shows that according to Figure 1 A perspective view of a single cutting blade of a milling tool, its design details including a flat mating surface.

[0023] Figure 3 It shows that according to Figure 1 A variant of the milling tool, which features a cutting insert with a constant width.

[0024] Figure 4 It shows that according to Figure 3 The milling tool's individual cutting edge, further details of which include a curved backing surface,

[0025] Figure 5 It shows that according to Figure 4 The blade design features a multi-curved edge.

[0026] Figure 6 It shows that according to Figure 4 Another variation of the blade has a polygonal curved shape.

[0027] Figure 7 A perspective view of a PKD composite preform is shown, with a single cutting blade from which it is to be separated.

[0028] Figure 8 It shows that according to Figure 1 , 3 Another variant of the milling tool features a PKD layer for forming a wavy profile of the cutting edge and

[0029] Figure 9 Another variation of the milling tool is shown, which has a PKD layer profile for forming the cutting edge of the interruption. Detailed Implementation

[0030] Figure 1A perspective view of a milling tool 1 according to the invention is shown, taking an end mill as an example. However, other milling tools, such as disc milling cutters, can also be provided within the scope of the invention. In any case, the milling tool 1 according to the invention is designed for cutting wood or woody materials, i.e., particleboard or fiberboard with or without coating. The milling tool 1 has a longitudinal central axis, which is a rotation axis 2 during operation, and wherein the milling tool 1 is driven rotatably about this rotation axis 2.

[0031] The milling tool includes a base 6, which is formed herein by a tool section 18 and a shank 17 integrally formed thereon. However, a multi-piece construction may also be suitable. In any case, at least one cutting edge 7 is arranged around the periphery of the base 6, wherein, in the illustrated embodiment, the milling tool 1 has two opposing cutting edges 7 facing each other about the axis of rotation 2.

[0032] The longitudinal direction 3 extends parallel to the axis of rotation 2. The radial direction 4 is perpendicular to this, originating from the axis of rotation 2 and extending through the cutting edge 7. Perpendicular to both the longitudinal direction 3 and the radial direction 4 is the rotational direction 5, which is derived from the rotational motion of the milling tool 1 about the axis of rotation 2.

[0033] Within tool section 18, the milling tool 1 has a milling section 22 that functions for cutting, the milling section having a cutting length L that is covered by the sum of all cutting edges 7. Furthermore, the milling tool 1 has an effective diameter D in its milling section 22, which is also referred to as the flight circle diameter of the cutting edges 7. Within the scope of the invention, a tapered or other structural form with a diameter D varying along the milling section 22 can be provided. In the present case, the diameter is constant in the milling section 22, and therefore a cylindrical structural form is used. In an exemplary embodiment as an end mill, the milling section 22 is elongated, wherein the cutting length L is advantageously greater than half the diameter D. In the preferred embodiment shown, the cutting length is greater than the diameter D. Each cutting edge 7 extends between two endpoints 23, 24, wherein the endpoints 23, 24 that are associated with each other lie on a common line parallel to the longitudinal direction 3. In the preferred embodiment shown, the two cutting edges 7 further extend along the entire cutting length L. However, a segmented design is also suitable, in which multiple shorter blades are connected in series to cover the cutting length L.

[0034] In the cutting edge 7, the cutting surface 8, pointing forward in the rotational direction 5, and the free surface 9, pointing outward in the radial direction 4, meet. The free surface 9 is constructed flat, but can also be ground or reworked in some other way to conform to the flight circle or to form a profile (see below). Both the cutting edge 7 and the adjacent cutting surface 8 extend curvedly in the longitudinal direction 3. Preferably, this involves a concave curvature. However, at least a partially convex curvature may also be suitable. Here, "curvature" generally refers to a non-straight or non-flat direction, which may include bends and polygonal lines in addition to continuous curvature. The curvature extends such that the cutting edge 7 and the cutting surface 8 are parallel to the longitudinal direction 3 in their central regions, while the partial faces of the cutting surface 8 are opposite each other in their end regions. Thus, in the cutting of coated particleboard or fiberboard, especially, the opposing cutting edge regions impact the outer edge layer of the insert material. There, a cutting force component pointing inward into the insert material is generated, which prevents the coating or cover layer from breaking.

[0035] The cutting edges 7 of the milling tool 1 are formed on flat cutting inserts 10 made of composite material, while the base 6 is made of a different material, here steel or tool steel. Two identical cutting inserts 10 are fixed to the base 6. This type of single cutting insert 10... Figure 2 The image is shown in perspective. It can be seen there that the composite material, as its base, comprises a carrier layer 11 and a hard layer 12. The carrier layer 11 is typically made of a hard metal, and the hard layer 12 is applied to this hard metal in a manner known per se, such as by PVD or CVD methods (physical vapor deposition or chemical vapor deposition). Various high-hardness materials are considered for this purpose. Here, the hard layer 12 is a PKD layer (polycrystalline diamond). The plane of the hard layer 12 or its free surface defines a free surface 9, while a cutting surface 8 is formed by a cut through the composite material. In the illustrated embodiment, the curvature of the cutting edge 7 and the cutting surface 8 is approximated by polygonal lines. However, continuous curvature can also be provided, for example, as in [the embodiment described in the original text]. Figure 6 As in the embodiments.

[0036] The cutting blade 10 has a blade length l and a thickness d. Overview Figure 1 directly shows that the blade length l is equal to the cutting length L. However, unlike the embodiment, a shorter blade length L may also be suitable. In any case, it is not difficult to see that the blade length l is larger than the thickness d, and especially several times larger. Overview Figure 1 also shows that the direction of the thickness d is substantially coincident with the radial direction 4 in the mounted state.

[0037] Regarding the rotation direction 5, the rear contact surface 13 is opposite the cutting surface 8, and this rear contact surface is designed as a flat surface in the illustrated embodiment. As a result, the cutting blade 10 has a minimum width in its middle region, and this width increases towards the ends.

[0038] Opposite to the free surface 9, the cutting blade 10 has a flat inner surface 20. Overview Figure 1 and 2 It is concluded that, according to Figure 2 The prepared cutting blade 2 is mounted on or brazed to the base 6, wherein the base 6 has a support surface 21 corresponding to the inner surface 20 of the cutting blade 10. According to... Figure 2 In the installed state, the inner surface 20 of the cutting blade 10 faces radially inward toward the base 6, while the corresponding flat support surface 21 constructed on the base 6 points radially outward toward the inner surface 20 of the cutting blade 10. The inner surface 20 rests against the support surface 21, which functions as a blade holder, and there is a brazed connection between the two. In addition, as part of the blade holder, the base 6 also has a similarly flat support surface 19 corresponding to the contact surface 13 of the cutting blade 10, on which the cutting blade 10 rests planarly with its contact surface 13. The cutting blade 10 is oriented such that its carrier layer 11 points radially inward toward the contact surface of the base 6, while the hard layer 12 points radially outward, i.e., outside the carrier layer 11 in the radial direction 4 and forms a free surface 9.

[0039] Figure 3 The perspective view shows the results based on Figure 1 A variant of the milling tool 1 has two cutting blades 10', the cutting edges 7 of which are continuously concavely curved. Figure 4 A single cutting blade of these cutting blades 10' is shown in a perspective partial view, wherein the rear abutment surface 13 in the rotational direction 5 is also curved. Here, the curvature is chosen such that the cutting blade 10 extends a constant width b along its longitudinal direction between the cutting surface 8 and the abutment surface 13. Corresponding to the curvature of the rear abutment surface 13, the support surface 19 constructed in the base 6 is also curved, such that the cutting blade 10' rests planarly against its rear abutment surface 13 and undergoes a planar brazing connection thereon. Unless otherwise stated, according to Figure 3 , 4 The embodiments are similar to those according to the remaining features and reference numerals. Figure 1 , 2 The implementation is consistent with the previous one.

[0040] Figure 5 Another embodiment of the cutting blade is shown in perspective, namely having according to Figure 2 and 4The common feature of the implementation methods is the cutting blade 10". Figure 2 Consistent, cutting blade 10" according to Figure 5 It has a curved cutting edge 7 and a curved cutting surface 8, the curvature of which follows a polygonal line along the longitudinal direction 3. Figure 2 The difference is that, however, the same applies to the backing surface 13, causing the cutting blade 10" to... Figure 4 The cutting blade has a constant width b along the longitudinal direction. (10" according to...) Figure 6 The embodiment also features a constant width b; however, the curvature is not simply concave, but rather a double concave shape with a convex intermediate section located therebetween. In the remaining features and reference numerals, Figure 2 , 4 The embodiments of 5 and 6 are consistent with each other.

[0041] Figure 7 A perspective view shows a composite preform 15 in the form of a circular blank. The composite preform 15 is generally flat and has a lower carrier layer 11 made of hard metal and an upper PKD hard layer 12 firmly applied thereon. All conceivable structural forms of the cutting blades 10, including the aforementioned cutting blades 10, 10', 10"', and 10''', are manufactured according to the method according to the invention, so that they are separated and separated by means of a cut 16 that cuts through the composite preform across the plane of the composite preform. The orientation of the cut 16 for forming three different cutting blades 10, 10', and 10" is shown here exemplary. However, in practice, the guidance of the cut 16 is chosen in a nested manner so that as many identical cutting blades 10 as possible can be separated and obtained from the circular blank or the composite preform 15.

[0042] Overview Figure 7 and other figures show that the subsequent free surface 9 of a single cutting blade 10 is formed by the free surface of the hard layer 12 of the PKD composite material, while the corresponding inner surface 20 of the cutting blade 10 is formed by the free, flat surface of the carrier layer 11. The latter does not require geometric remapping and can be directly used as a brazing surface for fixing to the support surface 21. The cutting surface formed by the notch 16 itself, in addition to the rear abutment surface 13, also forms a forward-curved cutting surface 8 and a similarly curved cutting edge 7. The cutting blade 10 prepared in this way is then fixed to the base 6 of the milling tool 1, for example, by hard brazing. Subsequent machining of the curvature of the cutting edge 7 and the cutting surface 8 is no longer required in the assembled or brazed state. Subsequent machining is limited to the sharpening of the cutting edge and possible correction of the free surface 9, as follows:

[0043] Figure 8 and 9 Other variations of the milling tool according to the invention are also shown. Figure 8In addition to the embodiments according to Figure 6 In addition to the two blades 10", two additional blades 10 are installed, with the hardened layer 12 on the outer side, i.e., a wavy profile 14 in the area between the blade 7 and the free surface 9. Instead of a wavy profile, a serrated shape may also be suitable. In any case, the blade 7 thus provided is configured as a rough blade, thereby reducing the resulting cutting force. According to... Figure 9 In the embodiment, a total of three blades 10''' are evenly distributed on the circumference according to Figure 6 The installation includes a PKD layer 12 with a profile 14 in the region of the cutting edge 7 and the free face 9. Here, the profile 14 includes the hardened layer 12, which otherwise remains flat, and regular interruptions in the cutting edge 7, thereby advantageously influencing the cutting force and cut formation. Furthermore, it is also applicable to installations based on… Figure 8 and 9 The embodiments are consistent with the previously described embodiments in all other features and reference numerals.

Claims

1. A milling tool (1) for cutting and machining wood materials, said milling tool being configured to be driven rotatably about a rotation axis (2), wherein, The milling tool includes a base (6) and at least one cutting edge (7) arranged around the base (6) with a pre-defined longitudinal direction (3), radial direction (4) and rotational direction (5) via the rotational axis (2). The cutting edge (7) is adjacent to a cutting surface (8) pointing forward along the rotational direction (5) and a free surface (9) pointing outward along the radial direction (4). The cutting edge (7) and the cutting surface (8) extend curvedly along the longitudinal direction (3). The invention is characterized by a curved blade (7) and a curved cutting surface (8) constructed on a cutting blade (10) constructed separately from the substrate (6), wherein the cutting blade (10) has a flat inner surface (20) facing radially inward toward the substrate (6) opposite to the free surface (9), wherein a flat support surface (21) corresponding to the flat inner surface (20) is constructed on the substrate (6), wherein the cutting blade (10) is fixed to the flat support surface (21) of the substrate (6) with its flat inner surface (20), wherein the cutting blade (10) is made of a composite material having a carrier layer (11) and a hard layer (12), wherein the cutting blade (10) is fixed to the substrate (6) with its carrier layer (11) pointing inward in the radial direction (4), and wherein the hard layer (12) is located outside the carrier layer (11) in the radial direction (4) and forms the free surface (9).

2. The milling tool according to claim 1, Its features are, The cutting blade (10) is welded to the flat support surface (21) of the substrate (6) with its flat inner surface (20).

3. The milling tool according to claim 1, Its features are, The milling tool has a milling section (22) having a cutting length (L) and a diameter (D), wherein the cutting length (L) is greater than half of the diameter (D).

4. The milling tool according to claim 1, Its features are, The milling tool has a milling section (22) having a cutting length (L) and a diameter (D), wherein the cutting length (L) is greater than the diameter (D).

5. The milling tool according to claim 1, Its features are, The cutting blade (10) has a blade length (l) and a thickness (d), and the blade length (l) is greater than the thickness (d).

6. The milling tool according to claim 1, Its features are, The milling tool has a milling section (22) having a cutting length (L), wherein at least one cutting edge (7) extends along the entire cutting length (L).

7. The milling tool according to claim 1, Its features are, The at least one blade (7) extends between two endpoints (23, 24), wherein the endpoints (23, 24) are located on a line parallel to the longitudinal direction (3).

8. The milling tool according to claim 1, Its features are, The hard layer (12) is a PKD layer, a PVD layer, or a CVD layer.

9. The milling tool according to claim 1, Its features are, The cutting blade (10) cuts from a flat composite blank (15) having a carrier layer (11) and a hard layer (12), such that the free surface (9) is formed by the hard layer (12), the inner surface (20) opposite the free surface (9) is formed by the carrier layer, and the cutting surface (8) is formed by means of a cut (16) through the composite blank (15).

10. The milling tool according to claim 1, Its features are, The blade (7) and the cutting surface (8) extend in a curved manner, and the cutting blade (10) has a contact surface (13) opposite to the cutting surface (8) with respect to the rotation direction (5), and the contact surface (13) is flat.

11. The milling tool according to claim 1, Its features are, The blade (7) and the cutting surface (8) extend in a curved manner, the cutting blade (10) has a contact surface (13) opposite the cutting surface (8) with respect to the rotation direction (5), and the cutting blade (10) has a constant width (b) between the cutting surface (8) and the contact surface (13).

12. The milling tool according to claim 1, Its features are, The contour (14) is machined into the free surface (9).

13. The milling tool according to claim 1, Its features are, The substrate (6) is formed of a different material than the cutting blade (10).

14. The milling tool according to claim 1, Its features are, The milling tool (1) is used for cutting and processing wood.

15. A method for manufacturing a milling tool (1) for cutting and machining wood materials, wherein, The milling tool (1) is configured to be driven to rotate about a rotation axis (2), wherein a longitudinal direction (3), a radial direction (4), and a rotational direction (5) are predetermined by the rotation axis (2). The milling tool includes a base (6) and at least one cutting edge (7) arranged around the periphery of the base (6), wherein the cutting edge (7) is adjacent to a cutting surface (8) pointing forward along the rotational direction (5) and a free surface (9) pointing outward along the radial direction (4), and wherein the cutting edge (7) and the cutting surface (8) are bent along the longitudinal direction (3). The cutting blade extends in a curved manner, wherein a curved cutting edge (7) and a curved cutting surface (8) are constructed on a cutting blade (10) constructed separately from the substrate (6), wherein the cutting blade (10) is made of a composite material having a carrier layer (11) and a hard layer (12), wherein the cutting blade (10) has a flat inner surface (20) radially inward toward the substrate (6) opposite to the free surface (9), wherein a flat support surface (21) corresponding to the flat inner surface (20) is constructed on the substrate (6), characterized by the following method steps: - A flat cutting blade (10) is separated from a flat blank, the cutting blade having a curved cutting edge (7), a curved cutting surface (8), and a flat inner surface (20). - The cutting blade (10) is fixed in the radial direction (4) inwardly pointing to the flat support surface (21) of the substrate (6) with its flat inner surface (20) and its carrier layer (11), wherein the hard layer (12) is located outside the carrier layer (11) in the radial direction (4) and forms the free surface (9).

16. The method according to claim 15, characterized in that, The cutting blade (10) is brazed with its flat inner surface (20) pointing inward in the radial direction (4) to the flat support surface (21) of the substrate (6).

17. The method according to claim 15, Its features are, The cutting blade (10) is cut from a flat composite blank (15) having a carrier layer (11) and a hard layer (12), such that the free surface (9) is formed through the hard layer (12), and the inner surface (20) opposite the free surface (9) is formed by the carrier layer (11). The curved cutting surface (8) is formed by means of a cut (16) through the composite blank (15), wherein the cutting blade (10) thus prepared is fixed on the base (6) of the milling tool (1).

18. The method according to claim 15, Its features are, The milling tool (1) is used for cutting and processing wood.

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