Tool head for a piercing tool and / or a turning tool

Abstract

The invention relates to a tool head (1, 100, 200, 300, 400) for a piercing tool and / or a turning tool, comprising: a cutting holder part (3); a coolant channel structure (9) with a coolant outlet (12, 36) associated with the cutting holder part (3); a coupling surface (13); and a pipe element (6) protruding from the coupling surface (13) along a central pipe longitudinal axis (5) for the intake of coolant into the coolant channel structure (9), wherein the coupling surface (13) has a rib structure (14, 30, 38) which, at least on both sides of the pipe element (6), defines a pipe-axially measured and overall maximum rib height level (19) of the rib structure (14, 30, 38) and, starting therefrom, extends in the direction towards the pipe element (6) or onto a transverse axis (31) of the pipe element and is formed so as to be continuously lowered below the maximum rib height level (19).

Description

[0001] Tool head for a grooving tool and / or a turning tool

[0002] The present invention relates to a tool head for a grooving tool and / or a turning tool and a manufacturing method for manufacturing a tool head for a grooving tool and / or a turning tool.

[0003] 5 EP 1722973 Al discloses a grooving tool. The grooving tool known from EP 1722973 Al comprises a coupling part that can be detachably connected to a tool head. The coupling part known from EP 1722973 Al has a first toothed surface and the tool head has a second toothed surface. When these surfaces engage with each other, they form an interface between these parts, which are then connected to each other by three 10 screws. The tool head known from EP 1722973 Al has a tube section that serves as a coolant inlet into the tool head. The tool head has a coolant outlet that is fluidly connected to the coolant inlet.

[0004] The problem with the tool head known from EP 1722973 Al is that the second toothed surface is often convex on the side of the pipe section, i.e., curved outwards. This means the tool head tilts very easily when the aforementioned screws are tightened, resulting in the aforementioned interface being fixed at an angle. Consequently, the tool head is often not aligned as precisely during grooving as is required for machining spatially difficult-to-access areas of the component.

[0005] 20 The aforementioned crowning of the second tooth surface typically arises from the need to bring it to the same height level by grinding and / or milling, particularly if the pipe section is already mounted before the tool head creates the tooth surface or is formed in the area of ​​the tooth surface. In this case, it obstructs the grinding or milling tool, preventing it from creating the ribbed structure in a single operation, i.e., from right to left, for example. Instead, it must be repeatedly repositioned and re-positioned to avoid collisions with the pipe section.

[0006] The object of the present invention is to provide a more precisely couplingable and at the same time simpler to manufacture tool head for a grooving tool and / or turning tool, and 30 a more precise and at the same time simpler manufacturing method for a tool head for a grooving tool and / or a turning tool with respect to its coupling capability.

[0007] The problem of the present invention is solved by the subject matter of claim 1. Advantageous further developments of the invention can be found in the dependent claims, which can be freely combined with each other.

[0008] The tool head for a grooving tool and / or a turning tool has a

[0009] 5 Cutting holder part, a coolant channel structure with a coolant outlet associated with the cutting holder part, a coupling surface and a pipe element projecting from the coupling surface along a central longitudinal axis of the pipe to the coolant inlet into the coolant channel structure, wherein the coupling surface has a rib structure which defines at least on both sides of the pipe element a pipe-axially dimensioned and overall maximum 10 rib height level of the rib structure and extends from this point towards the pipe element or a transverse axis of the pipe element and is continuously recessed below the maximum rib height level.

[0010] Typically, the rib structure is largely recessed so that, depending on the structural design of the ribs, most ribs and / or most rib sections extend below the maximum rib height level. The rib structure is present on at least both sides of the pipe element. It is conceivable and also possible for the rib structure to be present on a corresponding third or further side of the pipe element, so that the pipe element is at least partially surrounded. The rib structure has several ribs on at least both sides of the pipe element, between which the pipe element is consequently arranged. The rib structure on both sides of the pipe element defines the maximum rib height level, which is usually also the overall maximum axially dimensioned surface height of the coupling surface outside the pipe element.It is conceivable and possible that, if the rib structure is formed on three or more sides of the pipe element, it defines the overall maximum rib height level on each of these sides. The rib structure is formed by several ribs, each of which has a linear or planar rib ridge. An example of a planar rib ridge would be one that, viewed from above along the central longitudinal axis of the pipe, is rectangular or triangular.

[0011] 30 Where the rib structure defines the maximum rib height level, it consequently touches a height plane arranged perpendicular to the central longitudinal axis of the tube, usually by

[0012] The rib structure extends along each outer rib and / or through and along several rib ends, which consequently intersect the vertical plane. From this point, where it defines the maximum rib height level at least on both sides of the pipe element, the rib structure extends towards the pipe element or towards a transverse axis to the pipe element and is continuously recessed below the maximum rib height level. Thus, it is continuously recessed along the central longitudinal axis of the pipe between where it defines the maximum rib height level at least on both sides and where it ends on the side of the pipe element, so that it runs below the maximum rib height level at any point between these two points.

[0013] If the rib structure extends towards the transverse axis of the pipe element and is continuously recessed below the maximum rib height level, the rib structure has a groove-like basic shape. If the rib structure extends towards the pipe element and is continuously recessed below the maximum rib height level, the rib structure has a

[0014] 15 funnel-shaped basic form. Where the rib structure defines the maximum rib height level, the coupling surface is formed in the tube-axial direction for tube-axial support of the coupling surface at least on both sides of the tube element.

[0015] By extending from this point towards the pipe element or the transverse axis of the pipe element, and thereby continuously below the maximum

[0016] Since the rib structure is recessed to a constant rib height level, a convex basic shape of the rib structure on the side of the pipe element is avoided between and within the sides where it defines the maximum rib height level at least on both sides and thus provides axial support for the coupling surface at least on both sides of the pipe element. Where the rib structure is recessed in this way, it is designed for lateral rib flank contact with another rib structure formed at a constant rib height level, for example, of a coupling part, without touching a base surface portion of the other rib structure formed at a constant base height level.

[0017] The rib structure of the coupling surface consequently transforms the tube-axial support function of the 30 coupling surface, i.e., where the rib structure defines the maximum rib height level at least on both sides of the tube element, into a torque absorption function, i.e., where

[0018] The rib structure is designed to be recessed below the maximum rib height level, thus spatially decoupled. This allows for more precise coupling of the tool head, as it can engage with the coupling part 5 in a tilt-resistant manner when forming an interface and the rib structure of the coupling surface engages with the other coupling surface of the coupling part 5. The recessed shape of the rib structure can be produced particularly easily using additive manufacturing.

[0019] According to a further development, the rib structure is designed to be recessed in such a way that it follows a recessed portion of the coupling surface. This recessed portion of the coupling surface is the part of the coupling surface from which the rib structure 10 rises. This recessed portion of the coupling surface also prevents crowning on the side of the pipe element in this area of ​​the coupling surface. By designing the recessed portion of the coupling surface accordingly, the coupling surface can be manufactured additively in a particularly simple manner.

[0020] According to a further development, the rib structure or the base surface area is designed with a setback angle ranging from 0.5° to 15°. This setback angle is determined in a cross-section parallel to the longitudinal axis of the pipe, between a design line perpendicular to the longitudinal axis and located below the coupling surface, and a height contour line of the rib structure or the base surface area on the same side of the pipe element. Typically, the cross-section contains the central longitudinal axis of the pipe. At a setback angle of 0°, the rib structure would extend continuously at its maximum rib height. At a setback angle of 0.5°, the ribs of the rib structure are set less deeply below their maximum height than at a setback angle of 15°.In the range of the insertion angle from 0.5° to 15°, the ribs are sufficiently “flat” that they can form a correspondingly large lateral rib surface contact with the aforementioned further rib structure of the coupling part, and at the same time a convexity of the rib structure on the side of the pipe element is reliably avoided.

[0021] The height contour line can follow the ridge of a rib in cross-section if it is cut along its longitudinal extent in the 30° cross-section. The height contour line connects the high points of the rib structure in cross-section by linear segments when multiple ribs are present.

[0022] The cross-section is cut perpendicular to its longitudinal extent so that the angle of depression can be measured at each linear segment with respect to the design line. If the bottom surface area is recessed, the rib structure follows this, so that the height contour line then follows the bottom surface area in the cross-section. The height contour line follows the bottom surface area when it is cut in the cross-section between two adjacent ribs and thus appears as a continuous line in the cross-section. The height contour line connects the high points of the bottom surface area, which are consequently lower than the high points of the rib structure, in the cross-section by linear segments when several ribs in the cross-section are cut perpendicular to their longitudinal extent, so that the angle of depression can be measured at each linear segment with respect to the design line. Usually, the central longitudinal axis of the pipe lies in the cross-section.According to further training, the insertion angle is in the range of 0.8° to 5°. This range of insertion angle has proven to be optimally producible using additive manufacturing and at the same time represents the optimum between reliably preventing crowning of the rib structure and ensuring sufficiently large rib flank contact with the rest of the rib structure of the coupling part.

[0023] According to a further development, the rib structure defines the maximum rib height level at least on both sides of the pipe element by an outermost end rib and / or by several rib ends. As a result, the rib structure is largely recessed, 20 such that, depending on the structural design of the ribs, most ribs and / or most rib portions extend below the maximum rib height level. In other words, the rib structure is thus largely recessed below the rib height level along the central longitudinal axis. The outermost end rib or the several rib ends consequently form the highest edge of the rib structure, measured axially to the pipe element.

[0024] According to a further development, the rib structure is radially and / or parallel structured along the central longitudinal axis of the tube when viewed from above. "And" in "and / or" here means that the rib structure is partly radial and partly linear, with either a radial or a parallel structuring typically being implemented.30 If the rib structure is radially structured along the central longitudinal axis of the tube when viewed from above, it exhibits ribs that extend radially away from the tube element.

[0025] Publicer sections, for example with linear or surface-shaped rib ridges. If the rib structure is structured parallel to each other along the central longitudinal axis of the tube in the direction of viewing, it has ribs in plan view that extend parallel to each other, for example with linear or surface-shaped rib ridges.

[0026] 5. According to a further development, the rib structure is free of mechanical machining marks. According to this further development, the rib structure is manufactured without grinding or milling, and in particular, is directly additively manufactured.

[0027] According to a further development, the pipe element achieves a higher pipe height level, dimensioned axially, compared to the maximum rib height level. Following this development, pipe element 10 extends beyond the maximum rib height level and can thus be inserted particularly deeply into another coolant channel structure outside the tool head during coupling.

[0028] According to a further development, the tool head has a holder part connected to the cutting holder part, from which the cutting holder part projects along the central longitudinal axis of the tube in the viewing direction. The holder part has a top and a bottom surface, between which the cutting holder part is arranged along the central longitudinal axis of the tube in the viewing direction. The holder part has the coupling surface, and the rib structure defines the maximum rib height level at least on the top and bottom surfaces. The holder part thus ensures a particularly torque-stable mounting of the cutting holder part in the coupled state. The ribs of the rib structure extend along the central longitudinal axis of the tube in the viewing direction. If the rib structure is parallel, they are typically parallel or perpendicular to a normal vector of a surface section of the top surface.

[0029] According to further training, the cutting holder part, the holder part, and the tube element are designed as a monolithic unit. The tube element is thus irreversibly and permanently connected to the holder part and presents an obstacle to milling or grinding the rib structure, which cannot be irreversibly removed.

[0030] According to a further development, the rib structure is provided by at least one recess extending along the pipe element for the passage of a screw element.

[0031] 30 interrupted. The tool head can thus be attached to a coupled joint using screws.

[0032] The public-state reversibly detachable fixing, whereby the coupling surface can be supported in a tilt-resistant manner. Usually, three or four such recesses are provided.

[0033] According to a further development, the cutting tool holder has a cutting element that it receives and holds. The tool head is thus directly designed for grooving and / or turning, in that the cutting element accordingly has a cutting geometry designed for grooving, with which a groove is typically created or a section of the component is parted off by rotating the component relative to the tool head. The cutting element can also have a cutting geometry designed for turning, with which a groove is typically created or a section of the component is parted off by rotating the component relative to the tool head.

[0034] 10. The tool head is used to produce a circular cylindrical, conical, or curved component surface, or to shorten the component by facing. Within certain limits, the tool head can also be used for turning if the cutting element is designed for grooving, and conversely, the tool head can also be used for grooving if the cutting element is designed for turning. A person skilled in the art can recognize from the cutting edge geometry whether the cutting element is primarily, and therefore usually best, suited for grooving or turning. The same applies to the tool head.

[0035] According to further training, the coolant outlet is designed for rake face cooling. The coolant outlet can thus cool a rake face of a cutting element or the cutting element itself.

[0036] 20 The problem is also solved by a manufacturing process according to claim 14.

[0037] The manufacturing process for producing a tool head for a grooving tool and / or a turning tool comprises the steps: a) providing a metallic powder, b) melting the metallic powder layer by layer followed by layer-by-layer solidification, so that a tool head according to one of claims 1 to 13, according to the disclosed further developments 25 of the tool head and / or according to the disclosed embodiments is constructed. The advantages and effects described for the tool head produced in this way are realized analogously.

[0038] According to a further development of the process, the rib structure produced by step b) is provided without mechanical post-processing. By placing the rib structure 30 continuously below the maximum height level on the side of the pipe element,

[0039] Once the tool head is countersunk and manufactured in this way, no further mechanical post-processing is required to precisely couple the tool head.

[0040] Further advantages and expediencies of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures.

[0041] 5 of the figures show

[0042] Fig. 1: a perspective view of a tool head for a rotary tool according to a first embodiment;

[0043] Fig. 2: another perspective view of the tool head according to the first embodiment;

[0044] 10 Fig. 3: a top view of a coupling surface of the tool head according to the first embodiment;

[0045] Fig. 4: a sectional view of the tool head according to the first embodiment with respect to the section line AA shown in Fig. 3;

[0046] Fig. 5 shows a sectional view of a tool head according to a second embodiment, analogous to Fig. 4;

[0047] Fig. 6: a sectional view of a tool head according to a third embodiment, analogous to Fig. 4;

[0048] Fig. 7: a perspective view of a tool head for a rotary tool according to a fourth embodiment;

[0049] 20 Fig. 8: a top view of a coupling surface of the tool head according to the fourth embodiment;

[0050] Fig. 9: a perspective view of a tool head for a rotary tool according to a fifth embodiment;

[0051] Fig. 10: a top view of a coupling surface of the tool head according to 25 of the fifth embodiment.

[0052] First embodiment

[0053] Figures 1 to 4 show a tool head 1 for a rotary tool according to a first embodiment of a tool head according to the invention. As intended, the

[0054] PublicToolhead 1 is best used for rotary turning by moving the toolhead 1 along a direction 2 while rotating a component relative to the toolhead 1, thus machining the workpiece. The toolhead 1 has a cutting holder part 3 and a holder part 4 connected to the cutting holder part 3. The cutting holder part 3 is positioned in

[0055] 5 Viewing direction along a central longitudinal axis 5 of a pipe element 6 of the tool head 1 from the holder part 4. The holder part 4 has a top 7 and a bottom 8. As shown, for example, in Fig. 3, the cutting holder part 3 is arranged between the top 7 and the bottom 8 in the viewing direction along the central longitudinal axis 5 of the pipe.The holder part 4, and thus the tool head 1, has a coolant channel structure 9, which consists of a first channel 10 extending along the central longitudinal axis 5 of the tube and fluidly connected to the tube element 6, a second channel 11 extending transversely to the central longitudinal axis 5 of the tube and fluidly branching off from the first channel 10, and three third channels 12, which are thinner than the second channel 11 and exit the holder part 4 fluidly, directed towards the cutting holder part 3 15, thus forming a coolant outlet of the coolant channel structure 9. Only one of the third channels 12 is designated with the reference numeral 12 in Fig. 3. The tube element 6 serves as the coolant inlet to the coolant channel structure 9.

[0056] The holder part 4, and thus the tool head 1, has a coupling surface 13. The 20 mm pipe element 6 is centrally located with respect to the coupling surface 13 and projects from the coupling surface 13 along the central longitudinal axis 5 of the pipe, so that the coolant inlet is formed centrally in the area of ​​the coupling surface 13. The coupling surface 13 has a ribbed structure 14, which, by way of example, is radially structured in the direction of view along the central longitudinal axis 5 of the pipe. The ribbed structure 14 has ribs 15 distributed around the circumference of the pipe element 6. The ribs 15 are thus formed at least on both sides of the pipe element 6. The ribs 15 each have a triangular, and thus a planar, ribbed ridge 16, which widens in the radial direction away from the central longitudinal axis 5 of the pipe.The rib structure 14 can thus be engaged with a correspondingly structured further rib structure of 30 on another coupling surface in the sense of a Hirth coupling, so that the tool head 1 is designed to be couplingable with the further coupling surface. By the.

[0057] Public rib structure 14 and the correspondingly designed rib structure, which a person skilled in the art can readily deduce from the rib structure 14, are brought into engagement, the cutting holder part 3 is fixed in a predetermined position and orientation and is protected against the torque occurring during rotary turning, caused by the

[0058] 5 shear forces, supported.

[0059] The ribs 15 are spaced apart from each other in pairs by grooves 17 of the coupling surface 13 which extend radially with respect to the central longitudinal axis of the tube 5 and thus with respect to the tube element 6, as shown for example in Fig. 3; the ribs 15 and the grooves 17 are arranged alternately in the circumferential direction with respect to the tube element 6.

[0060] The rib structure 14 is interrupted by four recesses 18 extending axially along the central longitudinal axis 5 of the tube, which are designed to accommodate a screw element; in Figures 2 and 3, only one of the four recesses is designated with the reference numeral 18. The screw elements can be inserted into and through the tool head 15 on the side of an outer surface 20 opposite the coupling surface 14, by the recesses 18 interrupting the outer surface 20, as shown, for example, in Figure 2.

[0061] The cross-sectional view according to Fig. 4, which is oriented parallel to the central longitudinal axis 5 of the tube and thus shows the tool head 1 radially along and through the grooves 17 arranged at 12 o'clock and 6 o'clock with respect to Fig. 3, shows that the rib structure 14 defines a tube-axially dimensioned overall maximum rib height level 19 of the rib structure 14 on both sides 20 of the tube element 6; the rib height level 19 is a plane arranged perpendicular to the central longitudinal axis 5 of the tube, to which the rib structure extends as far as possible parallel to the central longitudinal axis 5 of the tube. In a combined view of Fig. 3 and Fig. 4, it becomes clear that the radially outermost and circular rib ends 20 of the ribs 15 are each tangent to the rib height level 19, i.e., this plane. This defines the maximum rib height level 19 also on the top side 7 and the bottom side 8. Fig. 3 and Fig.Figure 4 further shows, in a summary, that the rib structure 14, and thus the ribs 15, extending radially from where the rib ends 20 are tangent to the maximum rib height level 19, is continuously recessed 30 below the maximum rib height level 19 on the tube element 6. At any point within the rib ends 20, the rib structure 14 is therefore recessed relative to the...

[0062] The rib structure 14 is formed below the maximum rib height level 19, as shown in Fig. 4. The rib structure 14 is recessed in such a way that it follows a recessed base area 21 of the coupling surface 13; this base area 21 also forms the base of the grooves 17. The base area 21, and thus the rib structure 14 and the ribs 15, are recessed at an angle of repose α of, for example, 10°, which lies in the range of 0.5° to 15°, as shown in Fig. 4. The angle of repose α is measured in a cross-section according to Fig. 4 between a design line 22, oriented perpendicular to the central longitudinal axis of the pipe 5 and contained in the cross-section according to Fig. 4, which is arranged below the coupling surface 14, and a height contour line 23.In the case of the rib structure 14, i.e., a radially structured rib structure, the height contour line 23 is tangent to the floor area portion that extends continuously in the cross-section according to Fig. 4. In the case of the height contour line 23, it could just as well be a tangent applied to the rib ridges 16, whereby the angle of depression α would remain unchanged.

[0063] 15 By forming the rib structure 14 as shown particularly in conjunction with Fig. 3, the rib ends 20 assume a tube-axially dimensioned support function for the tilt-resistant attachment of the rib structure 14 to a physical plane oriented analogously to the maximum rib height level 19, while the rib structure 14 is formed on the side of the tube element 6 and thus within the rib ends 20 in such a way that the rib structure 14 avoids any contact with the physical plane, but at the same time is suitable for lateral engagement with and on the ribs of a correspondingly structured rib structure between the rib ends 20. The tool head 1 can therefore be coupled in such a way that it does not tilt when screws inserted through the recesses 18 are tightened for connection to a holder.25 The upper surface 7 has a conventional planar section 24 to which a normal vector 25 is assigned, oriented perpendicular to the central longitudinal tube axis 5. The normal vector 25 can be used, in accordance with the present disclosure, to describe and define the rib structure 14 together with the central longitudinal tube axis 5.

[0064] The holder part 4 and the pipe element 6 form a monolithic unit together with the cutting holder part 3. Consequently, the pipe element 6 cannot be removed from the holder 4 and thus from the area of ​​the coupling surface 13 reversibly, i.e. only destructively.

[0065] The tool head 1 further comprises a cutting element 26 for rotary turning with a rake face 5 27, towards which the third coolant channels 12 are directed for cooling the rake face 27. The cutting element 26 is reversibly held in the cutting holder part 3 by a screw 28.

[0066] Fig. 4 shows that the pipe element 6 reaches a higher pipe height level 29, dimensioned axially, compared to the maximum rib height level 19. The pipe element 6 thus projects 10 along the central longitudinal axis 5 of the pipe out of the rib height level 19 on the side of the pipe element 6.

[0067] Fig. 4, in conjunction with Fig. 3, further shows that the rib structure 14 has a concave, funnel-shaped basic form, and that the rib structure 14 runs mostly, i.e., except for the rib ends 20, below the maximum rib height level 19.

[0068] The tool head 1 was additively manufactured in the area of ​​the cutting holder part 3 and the holder part 4, and thus also in the area of ​​the coupling surface 13 and the rib structure 14. The rib structure 14 is free of any machining marks.

[0069] Second embodiment

[0070] Figure 5 shows, in a sectional view analogous to Figure 4, a second embodiment of a tool head 100, which, except for a smaller curvature angle α of, for example, 3° (which lies in the range of 0.8° to 5°), is constructed analogously to tool head 1. Therefore, identical reference numerals are used. The smaller curvature angle α of 3° allows for a larger lateral overlap with the ribs of a corresponding tool head 100.

[0071] 25 rib structure.

[0072] Third embodiment

[0073] Fig. 6 shows, in a sectional view analogous to Fig. 4, a third embodiment of a tool head 200, which, except for a smaller curvature angle a of exemplary 1.5°, which lies in the range of 0.8° to 5°, is identical to the tool head 1 and the tool head 200.

[0074] It is structured in a public-analogous manner. Therefore, identical reference symbols are used. The even smaller curvature angle α of 1.5° allows for an even greater lateral overlap with the ribs of a corresponding rib structure.

[0075] Fourth embodiment

[0076] Figures 7 and 8 show a fourth embodiment of a tool head 300, which is analogous to tool head 1 except for a differently structured ribbed structure 30. Figure 7 is analogous to Figure 1 and Figure 8 is analogous to Figure 3. In contrast to the ribbed structure 14 of the coupling surface 13 of tool head 300, the ribbed structure 30 of the coupling surface 13 of tool head 1 is structured parallel to each other in the viewing direction along the central longitudinal axis 5 of the tube. The ribbed structure 30 is formed from ribs 31 running parallel to each other in this viewing direction, extending on both sides of the tube element 6 and circumferentially surrounding it. The ribbed structure 30 has an outermost end rib 32 on both the upper side 7 and the lower side 8.The two outermost end ribs 32, like the other ribs 31, extend parallel to the central longitudinal axis 5 of the tube in the viewing direction and are oriented perpendicular 15 to the central longitudinal axis 5 of the tube and perpendicular to the normal vector 25. Along their longitudinal extent, they define the maximum rib height level 19 on both sides of the tube element 6 by being continuously tangent to the maximum rib height level 19. From this point, the rib structure 30 is continuously recessed below the maximum rib height level 19 in the direction of a transverse axis 33 of the tube element 6.

[0077] 20. The rib structure 30 thus has a trough-shaped basic form extending along the transverse axis 33, which is oriented perpendicular to and intersecting the central longitudinal axis 5 of the tube. The rib ends 34, located between the outermost end ribs 32, on the right and left outer sides with respect to Fig. 8, of the ribs 31 are thus continuously recessed below the maximum rib height level 19. The curvature angle α is measured in a cross-section oriented analogously to Fig. 4, which is thus oriented perpendicular to the transverse axis 33, by measuring the height contour line 23 along the rib ridges 31a of the ribs 31 and ribs 32, which are formed linearly in the viewing direction along the central longitudinal axis 5 of the tube, or, equivalently, along the cross-section between the ribs 31 and 32 thus cut.

[0078] 30 floor area shares 31b of the coupling surface 14 on each side of the pipe element 6 in the form

[0079] Public a continuous tangent connects and the angle between the height contour line 23 constructed in this way and the dimension line 22 is measured.

[0080] Fifth embodiment

[0081] Figures 9 and 10 show a fifth embodiment of a tool head 400, which is analogous to tool head 1 except for a differently structured ribbed structure 30 and a grooving design. Figure 9 is analogous to Figure 1 and Figure 10 to Figure 3. The tool head 400 is designed for grooving in that the cutting holder part 3 has an upper clamping section 35 and a lower support section 36, between which a cutting element 37 designed for grooving is clamped. The coolant channel structure 9 differs from that of tool head 1 in that it has an additional coolant outlet 38 for supplying coolant to a clearance surface 38a of the cutting element 37 and a single-channel coolant outlet 12. The rib structure 39 of the coupling surface 13 of the tool head 400 is analogous to the rib structure 30 of the coupling surface 13 of the tool head 300 in the direction towards the

[0082] The transverse axis 33 is continuously recessed, while the ribs 40 of the rib structure 39 are aligned parallel to the normal vector 25 along the central longitudinal axis 5 of the tube in the viewing direction, thus extending longitudinally from the upper surface 7 to the lower surface 8. They define the maximum rib height level 19 on the upper surface 7 and the lower surface 8, respectively, by and along several such outermost rib ends 41 of the ribs 40, in that the outermost rib ends 41 are tangent to the maximum rib height level 19. The rib structure 39 thus has a trough-shaped basic form analogous to the rib structure 30, but it is interrupted by the upper clamping section 35.

[0083] The curvature angle a is measured in a cross-section oriented analogously to Fig. 4, which is thus oriented perpendicular to the transverse axis 33, by making the height contour line 23 tangent to the 25 rib ridges 41a of the ribs 31, which are formed linearly in the direction of view along the central longitudinal axis of the tube 5, or equivalently, to the bottom surface portions 41b of the coupling surface 14 extending in the cross-section between the ribs 40 on each side of the tube element 6 in the form of a continuous tangent and measuring the angle between the height contour line 23 thus constructed and the design line 22.

[0084] The tool heads 1, 100, 200, 300 and 400 are manufactured using an additive manufacturing process. This additive manufacturing process comprises the following steps: a) providing a metallic powder, b) melting the metallic powder layer by layer, followed by layer-by-layer solidification, so that one of the tool heads 1, 100, 200, 300 and 400 is additively built up.

[0085] The present invention is not limited to the tool heads 1, 100, 200, 300 and 400, in particular not to a specific curvature angle α in the range of 0.5° to 15° and / or to design details of the tool heads 1, 100, 200, 300 and 400. The latter are selected by those skilled in the art such that the corresponding design of one of the tool heads 1, 100, 200, 300 and 400 meets the specific requirements of turning and / or grooving. Rather, it is crucial for those skilled in the art that the rib structures 14, 30 and 39 are formed as disclosed, continuously recessed below the rib height level 19 in the direction of the tube element 6 or the transverse axis 33, wherein the orientation and dimensioning of the ribs 15, 30 and 39 are selected such that they support the cutting element 26.

[0086] 15 or 37, respectively, in the coupled state, at a predetermined rotational position or a predetermined insertion position, usually at the level of the transverse axis 31, to be held stably in the coupled state.

[0087] Public

Claims

REQUIREMENTS 1. Tool head (1, 100, 200, 300, 400) for a grooving tool and / or a turning tool, comprising a cutting holder part (3), a coolant channel structure (9) with a coolant outlet (12, 36) associated with the cutting holder part (3), a coupling surface (13) and a pipe element (6) projecting from the coupling surface (13) along a central longitudinal tube axis (5) for coolant inlet into the coolant channel structure (9), wherein the coupling surface (13) rib structure (14, 30, 38) which defines a tube-axially dimensioned and overall maximum rib height level (19) of the rib structure (14, 30, 38) at least on both sides of the tube element (6) and extends from this in the direction of the tube element (6) or on a transverse axis (31) of the tube element (6) and is continuously recessed below the maximum rib height level (19).

2. Tool head (1, 100, 200, 300, 400) according to claim 1, wherein the rib structure (14, 30, 38) is formed in such a way as to be formed following a recessed bottom surface portion (21, 31b, 41b) of the coupling surface (13).

3. Tool head (1, 100, 200, 300, 400) according to claim 1 or 2, wherein the rib structure (14, 30, 38) or the bottom surface portion (21, 31b, 41b) is formed at an angle of retraction (a) in the range of 0.5° to 15°, wherein the angle of retraction (a) is dimensioned in a cross-section arranged parallel to the longitudinal axis (5) of the pipe between a dimensioning line (22) perpendicular to the central longitudinal axis (5) of the pipe and arranged below the coupling surface (13) and a height contour line (23) of the rib structure (14, 30, 38) or of the bottom surface portion (21, 31b, 41b) on the same side of the pipe element (6).

4. Tool head (1, 100, 200, 300, 400) according to claim 3, wherein the insertion angle (a) is in the range of 0.8° to 5°.

5. Tool head (1, 100, 200, 300, 400) according to any one of the preceding claims, wherein the rib structure (14, 30, 38) defines the maximum rib height level (19) at least on both sides of the tube element (6) by an outermost end rib (32) and / or by several rib ends (20, 41).

6. Tool head (1, 100, 200, 300, 400) according to any one of the preceding claims, wherein the rib structure (14, 30, 38) is structured radially and / or parallel in the direction of view along the central longitudinal axis of the tube (5).

7. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the rib structure (14, 30, 38) is free of mechanical machining marks.

8. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the tube element (6) reaches a higher tube height level (29) dimensioned in the tube axis relative to the maximum rib height level (19).

9. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the tool head (1, 100, 200, 300, 400) has a holder part (4) which is connected to the cutting holder part (3), from which the cutting holder part (3) projects in the direction of view along the central longitudinal axis (5) of the tube, and which has a top (7) and a bottom (8) between which the cutting part (3) is arranged in the direction of view along the central longitudinal axis (5) of the tube, wherein the holder part (4) has the coupling surface (13), wherein the rib structure (14, 30, 38) defines the maximum rib height level (19) at least on the side of the top (7) and the bottom (8).

10. Tool head (1, 100, 200, 300, 400) according to claim 9, wherein the cutting holder part, the holder part and the tube element (6) are formed as a monolithic unit.

11. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the rib structure (14, 30, 38) is interrupted by at least one recess (18) extending along the tube element (5) for the passage of a screw element.

12. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the cutting holder (3) has a cutting element (26, 37) received and held therein.

13. Tool head (1, 100, 200, 300, 400) according to one of the preceding claims, wherein the coolant outlet (12) is designed for chip surface cooling.18 14. Manufacturing method for producing a tool head (1, 100, 200, 300, 400) for a grooving tool and / or a turning tool, comprising the steps: a) Providing a metallic powder, b) layer-by-layer melting followed by layer-by-layer solidification of the metallic powder, so that a tool head (1, 100, 200, 300, 400) is built up according to one of claims 1 to 13.

15. Manufacturing method according to claim 14, wherein the rib structure (14, 30, 38) produced by step b) is provided without mechanical post-processing.

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