tool

Abstract

The present invention relates to a tool (1) for machining the peripheral surface of a workpiece, the tool (1) comprising an interface (3) configured for fixing the tool (1) to a counter interface and a base body (5) that is at least partially cylindrical, the base body (5) having a peripheral wall (7) surrounding a mounting space (9) and configured to be open at its front side so that a workpiece can be at least partially accommodated in the mounting space (9), at least one cutting edge (13) engaging in the mounting space (9) is arranged in the base body (5) for machining the peripheral surface of the workpiece, the peripheral wall (7) having at least one chip-passing recess (17) that is arranged relative to the at least one cutting edge (13) in such a way that chips removed by the at least one cutting edge (13) during machining of the workpiece can exit from the mounting space (9) to an outer peripheral area (19) of the base body (5) through the at least one chip-passing recess (17).

Description

Technical Field

[0001] The present invention relates to a tool for machining the outer peripheral surface of a workpiece.

Background Art

[0002] In particular, workpieces having a large outer diameter exceeding 170 mm and, at the same time, a large protruding length of at least 0.8 times the outer diameter are generally machined, especially by turning in a turn-mill center. This is particularly disadvantageous with respect to the overall manufacturing strategy for the production of complex parts, especially the stator housing of an electric motor, since it requires a lot of time and cost, especially with regard to the use of different machining stations and the reclamping of different tools required, on the one hand, for internal machining and, on the other hand, for external machining. In particular, the inner diameter of such workpieces can generally be machined using a rotating tool of a machining center, whereby rapid and especially automated reclamping is possible. Therefore, it is desirable that the outer diameter, i.e., the outer peripheral surface, of such workpieces can also be machined using a rotating tool of a machining center. However, currently, machining of the outer peripheral surface in a machining center is only possible using a so-called bridge tool with a cutting edge on an arm protruding radially from the interface, and due to geometric and stability reasons, only relatively small protruding lengths and / or outer diameters can be machined. The problems outlined here occur especially with respect to the micro-machining (IT7 quality) of correspondingly large outer diameters with a particularly large protruding length.

Summary of the Invention

[0003] The present invention is based on the problem of providing a tool for machining the outer peripheral surface of a workpiece that at least reduces, preferably avoids, the above-mentioned disadvantages.

[0004] This problem is solved by providing the technical teachings presented, in particular the teachings of the independent claims and the dependent claims as well as the embodiments disclosed in this specification.

[0005] In particular, the problem is solved by providing a tool for machining the outer circumferential surface of a workpiece, which comprises an interface configured to attach the tool to a mating interface. The tool also has a base that is at least partially cylindrical. The base has a circumferential wall with a mounting space, and is configured to have an opening at the front end so that the workpiece can be at least partially accommodated in the mounting space. At least one cutting edge that engages with the mounting space for machining the outer circumferential surface of the workpiece is disposed on the base. The circumferential wall has at least one chip passage recess, which is positioned relative to the at least one cutting edge so that chips removed by the at least one cutting edge during machining of the workpiece can exit the mounting space through the at least one chip passage recess into the outer peripheral region of the base. The base, being at least partially cylindrical, provides the tool with a high degree of stability so that large outer diameters can be machined with high quality even with a large overhang length, and especially fine machining (at least IT7 quality or higher) is possible. During machining, the workpiece to be machined can be held in a mounting space with an open front end, and the tool grips the workpiece with its circumferential wall in at least a specific area. Thus, the tool is configured particularly as a tubular or bell-shaped tool, providing inherently high stability. The outer circumferential surface of the workpiece, i.e., the outer diameter, can be machined with at least one cutting edge engaged in the mounting space, i.e., protruding radially into the mounting space. Since the chips generated during machining can exit radially outward through chip passage recesses corresponding to the cutting edges, damage to the workpiece surface, especially the outer circumferential surface of the workpiece, by particularly trapped chips positioned between the outer circumferential surface of the workpiece and the circumferential wall of the tool is effectively prevented. This, along with the high stability of the tool, ensures very high machining quality. Furthermore, the chip passage recesses advantageously reduce the weight of the tool, which has a positive impact on machining accuracy when the protrusion length is large.Finally, the interface allows the tool to be advantageously connected to the other interface, particularly preferably to the spindle of a machining center, and in particular, enables rotational machining of the workpiece, such as rotating either the tool or the workpiece around the tool's virtual longitudinal axis, or rotating both the tool and the workpiece relative to the tool's longitudinal axis. This advantageously allows at least the essential machining steps of the workpiece, particularly both internal and external machining, to be performed at the same machining station, particularly the machining center, which significantly reduces the time and cost associated with machining the workpiece. In particular, setup and reclamping times are greatly reduced.

[0006] In particular, the tool proposed here enables the complete machining of pot-shaped stator housings for electric motors using a single machine, especially a machining center. Both the inner diameter, i.e., the inner circumferential surface, and the outer diameter, i.e., the outer circumferential surface, of the pot-shaped stator housing can be machined on the same machine, especially a machining center.

[0007] In preferred embodiments of the tool, the interface is configured as a hollow shank taper interface, a steep taper interface, a Morse taper interface, or in another suitable manner.

[0008] In the context of this technical instruction, the axial or longitudinal direction is understood, in particular, as the direction extending along the longest extension, preferably along the axis of symmetry or rotation of a tool that is symmetrical in a cylindrical manner, and especially rotationally symmetric. The radial direction is perpendicular to the axial direction. The circumferential direction concentrically surrounds the axial direction.

[0009] In a preferred embodiment, the tool has exactly one cutting edge. In another preferred embodiment, the tool has multiple cutting edges.

[0010] In a preferred embodiment, the tool has exactly one chip passage recess. In another preferred embodiment, the tool has multiple chip passage recesses.

[0011] In a preferred embodiment of the tool, the base is configured to be circular or cylindrical or rotationally symmetric.

[0012] In a preferred embodiment of the tool, the base is configured in a tubular shape.

[0013] In a preferred embodiment of the tool, at least one cutting edge is positioned on the circumferential wall of the base.

[0014] In particular, at least one cutting edge has a geometrically defined or geometrically determined cutting edge.

[0015] In a preferred embodiment of the tool, at least one cutting edge is configured as a cutter plate, cutting insert, or replaceable cutting edge having at least one geometrically defined or geometrically determined cutting edge.

[0016] In particular, at least one cutting edge engages with the outer circumferential surface of the workpiece when the workpiece is at least partially housed in the mounting space.

[0017] A further development of the present invention provides that the tool comprises a plurality of cutting edges as the at least one cutting edge, the peripheral wall comprises a plurality of chip passage recesses, and at least one of the plurality of cutting edges is assigned to each of the plurality of chip passage recesses such that the chips removed by the assigned cutting edge can exit the mounting space out to the outer peripheral region through the assigned chip passage recess. It is possible to assign exactly one of the plurality of cutting edges to each of the plurality of chip passage recesses. However, it is also possible to assign a plurality of cutting edges, in particular at least two cutting edges, to at least one of the plurality of chip passage recesses. However, it is preferable that each of the plurality of cutting edges be assigned one, in particular exactly one chip passage recess, so that for each of the plurality of cutting edges, the chips removed by the respective cutting edge can exit radially out to the outer peripheral region through the assigned chip passage recess. When the tool comprises a plurality of chip passage recesses, the weight of the tool is also advantageously reduced, and the concept of a lightweight structure is also taken into consideration.

[0018] A further development of the present invention provides that at least one chip passage recess is configured to be closed along a circumferential line of the closed recess. The circumferential line of the recess extends around a radial vector perpendicular to the axial direction of the tool and penetrates the chip passage recess. Thus, the circumferential line of the recess is a line that surrounds the periphery of the chip passage recess, not the periphery of the tool. Thus, "periphery" as used herein refers to the periphery of the chip passage recess and not the periphery of the tool. In this case, at least one chip passage recess is configured in particular as a window in the circumferential wall. In particular, the chip passage recess is particularly completely enclosed by the material of the circumferential wall and / or by the material of another tool component, such as the cutting ring on the front. In this way, the stability of the substrate, and by extension the entire tool, is also increased.

[0019] A further development of the present invention provides that the peripheral wall has at least one additional recess. The at least one additional recess advantageously contributes to further weight reduction of the tool, and as a result, the tool can be made particularly lightweight. Thus, the concept of a lightweight structure is particularly considered.

[0020] In particular, unlike the chip passage recess, no cutting edge is assigned to the additional recess. Therefore, the additional recess does not have a cutting edge. Specifically, the additional recess is not used for chip passage.

[0021] A further development of the present invention provides that the at least one additional recess extends through the peripheral wall. In particular, the mounting space opens to the outer peripheral region in the area of ​​the additional recess. This design results in a significant reduction in the weight of the tool.

[0022] Alternatively, it is preferable that at least one additional recess is closed on at least one side in the radial direction. The additional recess is preferably closed on both sides, either facing the mounting space or the outer peripheral area of ​​the tool. Additional recesses closed on both sides can be manufactured, in particular, by a generative or additive manufacturing process.

[0023] In one embodiment, the peripheral wall is thinned in the region of the additional recess, i.e., its thickness is reduced. However, the peripheral wall still has a finite thickness even in the region of the additional recess. In particular, the additional recess is configured as a pocket in the peripheral wall. Therefore, in particular, the additional recess has a bottom that separates the volume of the additional recess from the mounting space or the outer peripheral region. At least one additional recess closed toward the mounting space also leads to a significant reduction in the weight of the tool, and at the same time, the tool has significantly greater stability than when the additional recess extends through the peripheral wall.

[0024] In a preferred embodiment of the tool, the peripheral wall has at least one additional recess extending through the peripheral wall and at least one additional recess that is closed on at least one side. Thus, various embodiments of the additional recesses can be advantageously combined with one another, particularly to simultaneously reduce the weight and improve the stability of the tool.

[0025] A further development of the present invention provides that the at least one cutting edge is positioned on a raceway circle having a diameter of at least 170 mm to a maximum of 300 mm, preferably at least 180 mm to a maximum of 280 mm, preferably at least 190 mm to a maximum of 270 mm, and preferably at least 200 mm to a maximum of 260 mm. Thus, the tool is advantageously configured to machine workpieces having particularly large outer diameters.

[0026] Further developments of the present invention provide that the mounting space has a length from the opening end face to the base face opposite the opening end face in the axial direction, and that the length corresponds to the raceway circle multiplied by a coefficient of at least 0.8 to a maximum of 3.5, preferably at least 2 to a maximum of 3, preferably at least 1.5 to a maximum of 2.5. Thus, the tool is configured to machine workpieces having particularly large overhang lengths. In particular, the opening end face is located on the opposite side of the interface in the axial direction. The mounting space is open in the region of the end face, allowing a workpiece to be inserted into the mounting space from the opening end face. In particular, the opening end face surrounds the opening of the mounting space into which the workpiece can be inserted. The base face is located in the longitudinal direction on the interface side. Preferably, the interface is integrally formed with the base face or connected in the form of multiple parts.

[0027] According to a further development of the invention, the tool is provided with at least one first cutting edge and at least one second cutting edge as the at least one cutting edge, and the at least one first cutting edge is arranged offset in the axial direction of the base body with respect to the at least one second cutting edge. Further, a first orbital circle different from the second orbital circle assigned to the at least one second cutting edge is assigned to the at least one first cutting edge. Thus, the at least one first cutting edge and the at least one second cutting edge are offset not only axially but also radially with respect to each other. Thereby, advantageously, stepped outer surface machining of the workpiece, in particular simultaneous or successive machining of a plurality of different outer diameters of the same workpiece, becomes possible.

[0028] According to a further development of the invention, it is provided that the base body and the interface are configured in the form of a plurality of parts and are connected to each other. This advantageously enables, in particular, the interface to be manufactured separately from the base body, especially from a different material. Thereby, ultimately, a higher rigidity and / or stability can be provided especially for the interface compared to the base body, which is advantageous because generally greater forces act on the region of the interface. At the same time, the base body can be configured to be lightweight while being stable.

[0029] In a preferred embodiment of the tool, it is provided that the interface is connected to the base body, in particular the base surface, by a form-fit connection, a friction connection, and / or a material connection. Preferably, the interface is screwed to the base body, in particular the base surface.

[0030] In an alternative preferred embodiment of the tool, the interface is integrally formed with the base body, preferably made of the same material. Thereby, the tool can be manufactured in a particularly cost-effective and simple manner.

[0031] A further embodiment of the present invention provides that the substrate comprises a first material and the interface comprises a second material. In particular, the first material is different from the second material. Thus, the substrate and the interface comprise or are composed of different materials. This advantageously allows for the optimization of material selection with respect to various desired properties, on the one hand for the interface and on the other hand for the substrate. In particular, it is possible to provide improved rigidity and / or stability for the interface, and the substrate can be configured to be both lightweight and stable.

[0032] In a preferred embodiment of the tool, the first material has a lower density than the second material. That is, the substrate can be made particularly lightweight. At the same time, the interface can be configured to be particularly rigid and / or stable.

[0033] In a preferred embodiment of the tool, the first material is a light metal and the second material is steel. Preferably, the first material is aluminum or an aluminum alloy. The selection of the corresponding materials allows for a lightweight and stable design of the substrate, as well as a rigid and / or stable design of the interface.

[0034] A further development of the present invention provides that a cutting ring having at least one front cutting edge is positioned on the opening end face of the base body. The at least one front cutting edge allows for advantageous machining of the end face of the workpiece, i.e., particularly the axially perpendicular face, in addition to the outer circumferential surface.

[0035] In a preferred embodiment, the cutting ring has exactly one front cutting edge. In another preferred embodiment, the cutting ring has multiple front cutting edges. Preferably, the cutting ring comprises at least one front cutting edge, which includes at least one first front cutting edge and at least one second front cutting edge, wherein the at least one first front cutting edge is radially offset on the cutting ring with respect to at least one second front cutting edge.

[0036] In particular, at least one front cutting edge has a geometrically defined or geometrically determined cutting edge.

[0037] In a preferred embodiment of the tool, at least one front cutting edge is configured as a cutter plate, cutting insert, or replaceable cutting edge having at least one geometrically defined or geometrically determined cutting edge.

[0038] In a preferred embodiment of the tool, the cutting ring is composed of multiple parts together with the base and connected to the base. In this way, the selection of materials for the cutting ring and the base can be advantageously optimized with respect to the properties required in each case.

[0039] In a preferred embodiment of the tool, the cutting ring has a third material having a higher density than the first material of the substrate. That is, the cutting ring can be advantageously configured to be more stable and / or harder than the substrate. Preferably, the cutting ring also advantageously contributes to the overall stability of the tool. Preferably, the third material is the same material as the second material of the interface.

[0040] In a preferred embodiment of the tool, the third material is steel.

[0041] In a preferred embodiment of the tool, the cutting ring has at least one chip evacuation groove assigned to at least one front cutting edge, which is arranged and configured such that chips removed by at least one front cutting edge can be removed through the chip evacuation groove assigned to the front cutting edge, particularly radially and / or axially in the direction of the interface. Preferably, each of the multiple front cutting edges of the cutting ring is assigned a particularly separate chip evacuation groove.

[0042] A further development of the present invention provides that at least one cutting edge is integrally formed with the circumferential wall. Preferably, at least one cutting edge is machined from the circumferential wall. Preferably, the cutting edge, and in particular the cutting edge, is coated with a hard material.

[0043] In alternative embodiments of the tool, at least one cutting edge is provided to be material-connected to the circumferential wall. Preferably, at least one cutting edge is bonded, welded, or soldered to the circumferential wall.

[0044] In alternative embodiments of the tool, at least one cutting edge is provided attached to the circumferential wall by a shape connection and / or friction connection. Preferably, at least one cutting edge is screwed to the circumferential wall.

[0045] Alternatively, or additionally, it is preferable that at least one cutting edge be adjustablely positioned on the circumferential wall. In this way, the position of at least one cutting edge, particularly in the axial and / or radial directions, can be advantageously set and, in particular, finely adjusted. In this way, the machining diameter of at least one cutting edge, i.e., the raceway circle in particular, can be adjusted with high precision.

[0046] In a preferred embodiment of the tool, at least one cutting edge is provided housed in a cutting edge cassette, the cutting edge cassette being positioned on the circumferential wall, particularly fixed, preferably screwed. The cutting edge can be connected to the cutting edge cassette by material connection, particularly by adhesive, soldering, and / or welding, or by shape connection and / or friction connection, particularly screwed. In a preferred embodiment, a tool adjustment mechanism configured to adjust the axial and / or radial position of the cutting edge may be provided on the cutting edge cassette, or the cutting edge can be adjusted indirectly via adjustment of the cutting edge cassette by providing the adjustment mechanism on the circumferential wall and configuring it to act on the cutting edge cassette.

[0047] In one embodiment of the tool, at least one front cutting edge is provided to be integrally formed with the cutting ring. Preferably, at least one front cutting edge is machined from the cutting ring. Preferably, the front cutting edge, and in particular the cutting edge of the front cutting edge, is coated with a hard material.

[0048] In alternative embodiments of the tool, at least one front cutting edge is provided to be material-connected to the cutting ring. Preferably, at least one front cutting edge is bonded, welded, or soldered to the cutting ring.

[0049] In alternative embodiments of the tool, at least one front cutting edge is provided attached to the cutting ring by a shape connection and / or friction connection. Preferably, at least one front cutting edge is screwed to the cutting ring.

[0050] Alternatively, or additionally, preferably, it is provided that at least one front cutting edge is adjustablely positioned in the cutting ring. In this way, the position of at least one front cutting edge, particularly in the axial and / or radial directions, can be advantageously set and, in particular, finely adjusted. In this way, the machining diameter of at least one front cutting edge, i.e., the orbital circle, can be adjusted with high precision.

[0051] In a preferred embodiment of the tool, at least one front cutting edge is provided housed in a cutting edge cassette, the cutting edge cassette being positioned on a cutting ring, particularly fixed, preferably screwed. The front cutting edge can be connected to the cutting edge cassette by material connection, particularly by adhesive, soldering, or welding, or by shape connection and / or friction connection, particularly screwed. In a preferred embodiment, the cutting edge cassette may also be provided with an end adjustment mechanism of the tool configured to adjust the axial and / or radial position of the front cutting edge, or the front cutting edge can be adjusted indirectly by adjusting the cutting edge cassette by providing the tool end adjustment mechanism on the cutting ring and configuring it to act on the cutting edge cassette.

[0052] A further development of the present invention provides that at least one guide bar engaging with the mounting space is disposed on the base. In this way, the tool is advantageously configured to perform micro-machining, in particular finishing, of the outer surface of a workpiece. On the other hand, if the tool does not have such a guide bar, it can be configured to perform pre-machining, in particular, of the outer surface of a workpiece.

[0053] A further development of the present invention provides that the peripheral wall including the at least one chip passage recess comprises a plurality of recesses, and each of the plurality of recesses is selected from the group consisting of chip passage recesses and additional recesses. This makes it possible to make the substrate particularly lightweight. Therefore, the at least one chip passage recess is in particular one of the recesses.

[0054] In one embodiment of the tool, the plurality of recesses are arranged so that the material of the circumferential wall does not deform in the region of the load path that occurs during machining of the workpiece. In particular, the plurality of recesses are preferably arranged so that the material of the circumferential wall does not deform only where the load path occurs during machining of the workpiece. In particular, the recesses, especially the chip passage recesses and additional recesses, are surrounded by webs or struts that form the circumferential wall, which extend along the load path. In particular, the base is configured in a pseudo-lattice structure. Thus, the tool has very high stability with an extremely small weight, advantageously in the sense of a lightweight structure concept. [Brief explanation of the drawing]

[0055] The present invention will be described in more detail below with reference to the drawings. [Figure 1] Figure 1 shows a first embodiment of the tool. [Figure 2] Figure 2 shows the first embodiment of the tool shown in Figure 1. [Figure 3] Figures 1 and 2 show detailed diagrams of the first embodiment of the tool. [Figure 4] A diagram of a second embodiment of the tool is shown. [Modes for carrying out the invention]

[0056] Figure 1 shows the first diagram of a first embodiment of a tool 1 for machining the outer surface of a workpiece (not shown). The tool 1 includes an interface 3, which is configured to attach the tool 1 to a mating interface, particularly to the mating interface of a machining center, particularly to the spindle of a machine. The tool 1 also has a base 5 that is at least partially cylindrical, preferably circular, and especially tubular. The base 5 has a circumferential wall 7 which surrounds a mounting space 9 in the circumferential direction and is configured to open in the area of ​​a front surface 11. In this way, the workpiece can be at least partially inserted into the mounting space 9 through the open front surface 11 and held in the mounting space 9.

[0057] The longitudinal or axial direction of tool 1 extends along the longitudinal axis or rotation axis A of tool 1. The radial direction is perpendicular to the longitudinal axis A, and the circumferential direction concentrically surrounds the longitudinal axis A.

[0058] At least one cutting edge 13 engaging with the mounting space 9 is positioned on the base 5 and configured to machine the outer circumferential surface of the workpiece. In particular, multiple cutting edges 13 are positioned on the base 5. The cutting edges 13 can be formed integrally with the circumferential wall 7. However, in the embodiments shown herein, the cutting edges 13, preferably configured as cutting inserts, are preferably configured in the form of multiple parts together with the circumferential wall 7 and are attached to the circumferential wall 7. Fixation is possible not only by material connection but also by shape connection and / or friction connection. Preferably, the cutting edges 13 are adjustablely positioned on the circumferential wall 7. In the embodiments shown herein, the cutting edges 13 are held in a cutting edge cassette 15, and in particular are screwed to the cutting edge cassette 15, which is then screwed to the circumferential wall 7.

[0059] The peripheral wall 7 also has at least one chip passage recess 17, which is positioned relative to at least one cutting edge 13 so that chips removed by at least one cutting edge 13 during workpiece machining can exit radially through at least one chip passage recess 17 from the mounting space 9 to the outer peripheral region 19 of the base 5. In particular, the embodiment of workpiece 1 shown herein has multiple such chip passage recesses 17, in which case each cutting edge 15 corresponds to a chip passage recess 17.

[0060] Tool 1 is configured to be both lightweight and stable, enabling high-quality machining of workpieces, particularly those with large outer diameters and large overhangs, especially in machining centers.

[0061] Preferably, each chip passage recess 17 is configured to be closed along the circumferential line of the closed recess, and as a result is surrounded in particular by the material of the circumferential wall 7, thus forming a pseudo-window in the circumferential wall 7.

[0062] At least one cutting edge 13 is preferably positioned on a raceway circle having a diameter of at least 170 mm to a maximum of 300 mm, preferably at least 180 mm to a maximum of 280 mm, preferably at least 190 mm to a maximum of 270 mm, and preferably at least 200 mm to a maximum of 260 mm.

[0063] The mounting space 9 preferably has a length from the end face 21 located on the front surface 11 to the base surface 23 on the opposite side in the direction of the longitudinal axis A, and this length corresponds to the raceway circle of at least one cutting edge 13 multiplied by a coefficient of at least 0.8 to a maximum of 3.5, preferably at least 2 to a maximum of 3, preferably at least 1.5 to a maximum of 2.5.

[0064] Preferably, the tool 1 comprises at least one cutting edge 13, which includes at least one first cutting edge 13.1 and at least one second cutting edge 13.2, wherein the first cutting edge 13.1 is offset from the second cutting edge 13.2 in the direction of the longitudinal axis A, and at the same time, it is also offset in the radial direction. In particular, a first orbital circle is assigned to the first cutting edge 13.1, which is different from the second orbital circle assigned to the second cutting edge 13.2. In this way, stepped outer surface machining of the workpiece is possible.

[0065] A cutting ring 27, which has at least one front cutting edge 25, is preferably located on the front surface 11 and is preferably composed of multiple parts together with the base 5, connected to the base 5, and in particular screwed. In particular, the cutting ring 27 preferably has end faces 21. The front cutting edges 25 are preferably screwed to the cutting ring 27. The cutting ring 27 preferably has at least one chip evacuation groove 29 through which chips removed by at least one front cutting edge 25 can be discharged to the outside, particularly radially and / or axially rearward in the direction of the interface 3. Preferably, each front cutting edge 25 is assigned a chip evacuation groove 29.

[0066] Figure 2 shows a second diagram of the tool according to the first embodiment of tool 1 shown in Figure 1.

[0067] Elements that are identical and functionally identical are given the same reference numerals in all figures; therefore, please refer to the above explanation in all cases.

[0068] In the embodiments shown herein, interface 3 is configured as a hollow shank taper interface. In other embodiments, interface 3 may be configured as a steep taper interface, a Morse taper interface, or in any other suitable manner.

[0069] Preferably, the interface 3 is composed of multiple components together with the base 5 and is connected to the base 5 particularly by shape connections, friction connections, and / or material connections. Preferably, the interface 3 is screwed to the base 5, particularly to the base surface 23.

[0070] Preferably, the substrate 5 comprises a first material, and the interface 3 comprises a second material. Preferably, the first material has a lower density than the second material, and in particular the first material is a light metal, especially aluminum or an aluminum alloy, and the second material is steel.

[0071] The cutting ring 27 preferably includes a third material having a higher density than the first material of the substrate 5, and the third material is preferably steel.

[0072] Figure 3 shows a detailed view of the first embodiment of the tool 1 according to Figures 1 and 2. The cutting edges 13 and the corresponding chip passage recesses 17 can be seen particularly clearly in this figure.

[0073] Figure 4 shows a diagram of a second embodiment of the tool 1. The peripheral wall 7 preferably has at least one additional recess 31, and in this case has multiple additional recesses 31, and for clarity, only some of the additional recesses 31 are designated by corresponding reference numerals. In the embodiment shown herein, the additional recesses 31 extend through the peripheral wall 7 so that the mounting space 9 opens to the outer peripheral region 19 through the additional recesses 31. In contrast to the chip passage recesses 17, no cutting edge 13 is assigned to the additional recesses 31. The chip passage recesses 17 and the additional recesses 31 are collectively referred to as the recess 32.

[0074] In another embodiment, the additional recess 31 can be configured to close radially on at least one side, particularly toward the mounting space 9. Alternatively, the additional recess 31 can close toward the outer peripheral region 19, or be closed on both sides. It is also possible to have an embodiment in which at least one of the additional recesses 31 extends through the peripheral wall 7, and at least one of the additional recesses 31 is configured to close on at least one side.

[0075] The recesses 32, i.e., the chip passage recesses 17 and the additional recesses 31, are preferably arranged so that the material of the peripheral wall 7 does not become recessed in areas where load paths occur during workpiece machining. In this way, the tool 1 is configured in a pseudo-grid shape, making it lightweight and highly stable.

[0076] At least one guide bar 33 that engages with the mounting space 9 is preferably located on the base 5. In the embodiment shown herein, there are multiple guide bars 33, and for clarity, only some of the guide bars 33 are given corresponding reference numerals. The guide bars 33 configure the tool 1 to perform finishing operations on a workpiece in particular.

[0077] The embodiment of tool 1 shown herein comprises a first chip passage recess 17.1 and a second chip passage recess 17.2, which are designed to differ from each other in particular as follows: The first chip passage recess 17.1 is configured to close along the circumferential line of the closed recess, while the second chip passage recess 17.2 is configured to open at the front. However, in this configuration of tool 1, a cutting ring can also be placed on the front surface 11, in which case the second chip passage recess 17.2 is also closed.

[0078] The first embodiment of the tool 1 shown in Figure 1 may also be modified to include at least one additional recess 31.

Claims

1. A tool (1) for machining the outer surface of a workpiece, The interface (3) is configured to fix the tool (1) to the other interface, It comprises a base (5) which is at least partially cylindrical, The base (5) has a peripheral wall (7) that surrounds the mounting space (9), and is configured to have an open front so that the workpiece can be accommodated at least partially in the mounting space (9). At least one cutting edge (13) projecting radially into the mounting space (9) is positioned on the base (5) to machine the outer circumferential surface of the workpiece. The peripheral wall (7) has at least one chip passage recess (17), which is positioned relative to the at least one cutting edge (13) so that chips removed by the at least one cutting edge (13) during machining of the workpiece can pass through the at least one chip passage recess (17) out of the mounting space (9) to the outer peripheral region (19) of the base (5). The peripheral wall (7) is provided with at least one additional recess (31), The tool (1) is configured such that the at least one additional recess (31) is closed on at least one side in the radial direction.

2. The tool (1) according to claim 1, wherein the tool (1) comprises a plurality of cutting edges (13), the peripheral wall (7) comprises a plurality of chip passage recesses (17), and at least one of the plurality of cutting edges (13) is assigned to each of the plurality of chip passage recesses (17) such that the chips removed by the assigned cutting edge (13) can exit the mounting space (9) to the outer peripheral region (19) through the assigned chip passage recess (17).

3. The tool (1) according to claim 1, wherein the at least one chip passage recess (17) is configured to be closed along a closed circumferential line of the chip passage recess (17).

4. The tool (1) according to claim 1, wherein the at least one additional recess (31) extends through the peripheral wall (7).

5. The tool (1) according to claim 1, wherein the at least one cutting edge (13) is arranged on a raceway circle having a diameter equal to the machining diameter of the at least one cutting edge (13), and having a diameter of at least 170 mm to a maximum of 300 mm.

6. The tool (1) according to claim 5, wherein the mounting space (9) has a length from the opening end face (21) to the opposite base face (23), and the length corresponds to the raceway circle multiplied by a coefficient of at least 0.8 to a maximum of 3.

5.

7. The tool (1) according to claim 1, wherein the tool (1) comprises at least one first cutting edge (13.1) and at least one second cutting edge (13.2), the at least one first cutting edge (13.1) is positioned offset in the axial direction of the base (5) relative to the at least one second cutting edge (13.2), and further, the at least one first cutting edge (13.1) is assigned a first orbital circle different from the second orbital circle assigned to the at least one second cutting edge (13.2).

8. The tool (1) according to claim 1, wherein the base (5) and the interface (3) are composed of multiple parts and connected to each other.

9. The tool (1) according to claim 1, wherein the substrate (5) comprises a first material, and the interface (3) comprises a second material, wherein the first material has a lower density than the second material.

10. The tool (1) according to claim 1, wherein a cutting ring (27) having at least one front cutting edge (25) is disposed on the opening end face of the base body (5), and the cutting ring (27) together with the base body (5) is configured in the form of multiple parts and is connected to the base body (5).

11. The at least one cutting edge (13) It is integrally formed with the peripheral wall (7), or The peripheral wall (7) is connected by a material connection, or The peripheral wall (7) is attached by shape connection and / or friction connection, The tool (1) according to claim 1, which is adjustablely positioned on the peripheral wall (7).

12. The tool (1) according to claim 1, wherein at least one guide bar (33) protruding radially into the mounting space (9) is disposed on the base (5).

13. The tool (1) according to claim 1, wherein the peripheral wall (7) including the at least one chip passage recess (17) comprises a plurality of recesses (32), and each of the plurality of recesses (32) is selected from the group consisting of chip passage recesses (17) and additional recesses (31).

Images