Honing tool and method for manufacturing a honing sleeve

Description

[0001] The invention relates to a honing sleeve for a honing tool with at least one honing diameter adjustable by means of at least one expanding bar of the honing tool.

[0002] From CN 109 434 666 A a honing tool is known with at least one honing diameter adjustable by means of at least one expanding bar of the honing tool and a honing sleeve, wherein the expanding bar is formed on the honing sleeve.

[0003] A honing tool according to the preamble of claim 1 is known from US 3 710 518 A.

[0004] A honing tool with an adjustable honing diameter and a honing sleeve are known from DE 10 2014 117 174 A1.

[0005] The commonly used honing tool, and especially its honing sleeve, often has a short service life. In particular, cracks and even fractures of the honing tool body and / or the honing sleeve frequently occur, which in turn leads to increased maintenance and process costs.

[0006] It is therefore an object of the present invention to offer a honing tool with an adjustable honing diameter as well as a method for manufacturing a honing sleeve, which enables cost-effective honing with an adjustable honing diameter.

[0007] The problem is solved by a honing tool with the features of claim 1.

[0008] One of the underlying ideas of the invention is that the service life of honing sleeves of this type is often reduced by the formation of a projection along a longitudinal slot of the honing sleeve, over which the honing sleeve can be driven rotaryally. For example, the previously cited publication DE 10 2014 117 174 A1 shows this in the Fig. 1 The honing tool features a projection formed as an inward bend. The honing sleeve can thus be driven by applying torque to the projection. However, this often leads to cracking in the honing sleeve along or in the area of ​​the longitudinal slot. To accommodate the projection, the honing tool body currently has a groove, which weakens the tool body, frequently resulting in breakage of the tool body, which is particularly costly.

[0009] In contrast, according to the invention, the honing sleeve can be driven rotaryally by means of a reaming bar received in the reaming bar receptacle of the honing sleeve. An additional projection is therefore not required. No additional groove is needed in a tool body to receive the projection. The service life of the tool body, particularly for smaller diameters, for example, less than or equal to 10 mm and especially preferably less than or equal to 5 mm, can thus be extended. The position of the reaming bar receptacle of the honing sleeve is freely selectable or at least substantially freely selectable. In particular, the reaming bar receptacle can be positioned at a distance from the longitudinal slot, especially from its two free longitudinal edges. Thus, the reaming bar receptacle can be located outside an area of ​​the honing sleeve that would otherwise be weakened by the longitudinal slot. The service life of the honing sleeve can therefore be significantly extended.

[0010] Furthermore, improved concentricity and therefore reduced vibrations during operation can result. This also reduces wear and consequently extends service life.

[0011] The expansion bar mount can be designed to provide a rotationally fixed mount for the expansion bar.

[0012] To adjust the honing diameter, the honing sleeve can be expandable. For this purpose, a longitudinal slot with two free longitudinal edges is formed in the honing sleeve. The expansion can then be achieved along the longitudinal slot. In particular, the expansion can be accomplished by spreading the longitudinal slot. The longitudinal slot is easy to produce if the at least two free longitudinal edges of the slot are tangential or at least substantially tangential. The honing sleeve can be designed without any chamfers in the area of ​​the longitudinal slot. Therefore, chamfering of one or even both free longitudinal edges is unnecessary.

[0013] According to the invention, the expanding bar receptacle can be designed as a stop on at least one side, preferably two sides, for an expanding bar to be received in it. The expanding bar receptacle can be designed as a groove, in particular on the inside of the honing sleeve, and / or the expanding bar receptacle can have a groove. The honing sleeve can be reinforced in the area of ​​the expanding bar receptacle.

[0014] According to the invention, a widening bar of the honing tool, for which the honing sleeve is intended, can be received in the widening bar receptacle.

[0015] The expanding bar mounted in the expanding bar holder can be configured to control the honing diameter. To control the honing diameter, the expanding bar can also be configured to control the expansion of the honing sleeve. Furthermore, the expanding bar can be configured to drive the honing sleeve rotaryally. The expanding bar can therefore be multifunctional.

[0016] The expanding bar can be designed as a counterpart to an expanding mandrel of a honing tool for which the honing sleeve is intended. In particular, the expanding bar can be designed as a web. Preferably, the expanding bar has a chamfer along its free side surface facing the central axis of the honing sleeve. By selecting and / or adjusting the slope of this chamfer, the accuracy and / or extent of the expansion of the honing sleeve can be adapted to the specific requirements by selecting and / or adjusting the expansion bar with the expanding mandrel.

[0017] The honing sleeve can be configured for either left- or right-hand rotation in all embodiments. According to the invention, the expansion bar receptacle can be designed as a one-sided stop for this purpose.

[0018] In all embodiments, it is also conceivable that the honing sleeve is designed for both clockwise and counterclockwise operation. For this purpose, the expanding bar receptacle can be designed as a two-sided stop, particularly for the expanding bar to be accommodated within it.

[0019] To adapt to different honing situations, for example, to different cylinders to be honed, especially those with different inner diameters, the honing sleeve is preferably flexible and—most preferably—elastically deformable. To increase and / or adjust the deformability of the honing sleeve, it can have at least one recess. Such a recess can serve as a local weakening of the honing sleeve. Thus, the at least one recess can reduce the forces required to expand the honing sleeve. In this context, it is particularly preferred if several recesses are provided, especially if they are evenly distributed across the outer surface of the honing sleeve.

[0020] A cutting element can be formed and / or arranged on the outside of the honing sleeve. The cutting element can be designed as at least one honing strip and / or have at least one honing strip. A friction material can be applied and / or arranged on the outer surface of such a honing strip. Alternatively or additionally, the cutting element itself can also be designed as a friction material and / or have such a friction material. Such a friction material can be a diamond-containing material, a boron nitride-containing material, in particular a cubic boron nitride (CBN)-containing material, a corundum-containing material, and / or a ceramic material. The friction material can particularly preferably have a Mohs hardness of at least 8. In general, the cutting element can be formed and / or arranged on the outer surface of the honing sleeve, either partially or over the entire area.

[0021] The honing sleeve can be made at least partially of plastic and / or steel, preferably with the exception of the cutting element.

[0022] The honing sleeve can be manufactured in a particularly simple way using a rapid prototyping process, especially wire EDM and / or 3D printing. A honing sleeve manufactured using 3D printing can be particularly cost-effective.

[0023] Particularly in manufacturing processes that allow layer-by-layer and / or point-by-point build-up and / or removal of material, for example 3D printing, the shape of the honing sleeve, especially the shape of the expansion bar or the expansion bar mount, can be produced easily and / or individually.

[0024] If the honing sleeve has at least two separate cutting areas, the honing tool for which the honing sleeve is intended can have different honing diameters. Furthermore, the overall service life of the honing sleeve can be extended, particularly by using the at least two cutting areas sequentially.

[0025] The extended service life of the honing sleeve enables longer maintenance intervals and longer service lives for the honing tool overall, thereby reducing the process costs of a honing process.

[0026] The honing tool can be used in a particularly flexible and versatile way if the honing sleeve can be attached and / or arranged detachably on the honing tool.

[0027] If the honing sleeve is at least partially made of plastic, it can be designed for single use. This allows the rest of the honing tool to be used for a very long overall service life, with only the honing sleeve, a particularly important wear part, needing to be replaced as required. Manufacturing the honing sleeves from plastic allows for particularly cost-effective production, thus making replacement cost-effective overall.

[0028] To adjust the effective outer diameter of the honing tool, particularly in the cutting area, and thus the honing diameter, the honing tool has a reaming mandrel for adjustable expansion of the honing sleeve. The reaming mandrel can have one or more chamfers. The chamfers can be at an angle to the longitudinal axis of the reaming mandrel. The angle can be from 0.5° to 10°, preferably 1.5°.

[0029] One or more of the chamfers can be formed by one or more cones on the expanding mandrel. In other words, the honing tool can be equipped with a single or multiple cone, for example, a double or triple cone.

[0030] Several of the angled surfaces can be arranged one after the other for a honing tool with multiple cutting areas.

[0031] For a honing tool with a multiple cone, it can be provided that the honing sleeve has at least two separate cutting areas, in particular as many cutting areas as cones.

[0032] The expanding bar can have at least one bevel. The bevels can run at an angle to the longitudinal axis of the expanding bar. The angle can be 0.5° to 10°, particularly preferably 1.5°.

[0033] The expanding mandrel and the expanding bar can be designed to be complementary in such a way that an axial relative displacement with respect to the expanding mandrel results in a radial displacement of the expanding bar. This allows for precise control of the honing sleeve expansion. To control the expansion, it is therefore sufficient to displace the expanding mandrel along its longitudinal axis relative to the rest of the honing tool.

[0034] Preferably, the expanding bar, which is provided as a counterpart to the expanding mandrel, can be designed to be complementary to the one or more inclined surfaces of the expanding mandrel, in particular to the one or more cones.

[0035] Furthermore, it is conceivable that the expanding mandrel has at least one, preferably three, five or six, expanding surfaces on which the expanding bar of the honing tool can be arranged and / or slidably positioned relative to the expanding mandrel.

[0036] The honing tool comprises a tool body on which the honing sleeve sits. The tool body can be cylindrical or at least substantially cylindrical. It may have a flat surface. This flat surface can be complementary to at least part of the honing sleeve, particularly to the expansion bar receptacle. In this case, the flat surface can interact with the honing sleeve, especially with its expansion bar receptacle. This improves the seating of the honing sleeve on the honing tool and, in particular, on the tool body. It can also improve the torque transmission to the honing sleeve for its rotary drive.

[0037] The honing tool, in particular the tool body, can have a coolant supply, preferably running inside it.

[0038] Furthermore, the tool body features two sliding surfaces along which a sliding nose of the honing sleeve can slide during the expansion of the honing sleeve. The sliding surfaces are at a non-zero angle to each other in cross-section and can, in particular, be adjacent to one another. The stability, stiffness, and / or fracture strength of the tool body can be improved if the sliding surfaces are designed to be separate from each other. The sliding surfaces can also be limited to one or more short sections of the cross-sectional circumference of the tool body. For example, they can be designed such that they each occupy a maximum of 20 percent of the cross-sectional circumference. The sliding surfaces are designed such that, during radial displacement of the expansion bar of the honing sleeve or the expansion bar receptacle of the honing sleeve, the sliding noses slide along the sliding surfaces.The honing sleeve can be expanded, particularly while maintaining a circular or at least substantially circular cross-section, by radially displacing the expansion bar mount outwards. It may suffice for the sliding surfaces to be flat or at least substantially flat.

[0039] Furthermore, the invention includes a method for manufacturing a honing sleeve with the features of claim 6.

[0040] The honing sleeves are manufactured using 3D printing. This method allows for the simple formation of the honing sleeve protrusions. It enables layer-by-layer and / or spot manufacturing.

[0041] If the honing sleeves are manufactured using a layer-by-layer and / or spot-cutting process, several honing sleeves can be produced simultaneously or at least almost simultaneously within the same layer. This reduces production time and therefore production costs.

[0042] One of the honing sleeves to be manufactured is positioned and / or manufactured inside another honing sleeve. Particularly when using a layer-by-layer and / or point-by-point manufacturing process, this can reduce the travel distances of a print head or similar component of a production machine, such as a 3D printer. This allows for shorter production times and further reductions in manufacturing costs.

[0043] According to the invention, several honing sleeves are manufactured simultaneously using 3D printing.

[0044] The honing sleeves of the honing tool according to the invention feature a flared flange receptacle. With conventional manufacturing methods for producing honing sleeves, such as bending, such special structures cannot be manufactured or can only be produced with a very high additional effort, resulting in very high manufacturing costs. In contrast, our own investigations show the surprising effect that manufacturing using 3D printing can reduce the production costs to half, and in some cases even to less than one-tenth, of what was previously common.

[0045] Furthermore, manufacturing using 3D printing enables particularly high flexibility; in particular, different types of honing sleeves, for example for different honing diameters and / or honing diameter ranges, can be manufactured individually but still cost-effectively.

[0046] Since no specially manufactured molds or the like are required, particularly short overall delivery times can be achieved.

[0047] It is conceivable to manufacture honing sleeves containing plastic and / or metal using 3D printing.

[0048] Further features and advantages of the invention will become apparent from the following detailed description of the embodiments of the invention, with reference to the figures of the drawing which show details essential to the invention, as well as from the claims.

[0049] The features shown in the drawing are presented in such a way that the special features according to the invention can be clearly made visible.

[0050] They show: Fig. 1 a honing tool in perspective view; Figs. 2 and 3 a honing tool not belonging to the invention in two different states with differently set honing diameters, each in a cross-sectional view; Fig. 4 a honing tool according to the invention in a cross-sectional view; Figs. 5 and 6 a honing tool not belonging to the invention in two different states with differently set honing diameters, each in a cross-sectional view; Fig. 7 a honing sleeve not belonging to the invention in perspective view; Fig. 8 another honing sleeve not belonging to the invention in perspective view; Fig. 9 a longitudinal section view of the honing sleeve of the Fig. 8 and Fig. 10 two honing sleeves during their manufacture in a 3D printer in schematic, perspective view.

[0051] To facilitate understanding of the invention, corresponding elements in the following description of the figures in the drawing are provided with the same reference numerals. Fig. 1 shows a honing tool 10 with an adjustable honing diameter. The honing tool 10 has a honing sleeve. 12 The honing sleeve 12 has several cutting elements on its outer surface. 14 on, of which in Fig. 1 For illustrative purposes, only one is clearly visible. The cutting elements 14 are preferably arranged evenly distributed along the outside of the honing sleeve 12. They are designed in the form of honing strips. The cutting elements 14 are preferably coated with a friction material, in particular a diamond-containing and / or a corundum-containing material.

[0052] The honing sleeve 12 sits in the area of ​​a recess. 20 on a tool body 16.

[0053] A widening mandrel extends through the tool body 16. 18, The honing tool 10 is slidably guided, particularly along its longitudinal direction. The expanding mandrel 18 protrudes from the tool body 16 at its rear end.

[0054] As will be explained in more detail in the following figures of the drawing, the honing diameter can be determined. D by moving the expanding mandrel 18 relative to the tool body 16 and / or to the honing sleeve 12 and in particular also by adjusting the diameter of the honing sleeve 12.

[0055] At the end of the tool body 16 opposite the end where the expanding mandrel 18 protrudes from the tool body 16, there is a spacer sleeve. 22arranged. In particular, the spacer sleeve 22 can be configured to prevent the honing sleeve 12 from slipping off the tool body 16 along its longitudinal direction. The spacer sleeve 22 can also be configured to position the honing sleeve 12 in a desired position on the honing tool 10.

[0056] The spacer sleeve 22 is detachably mounted on the tool body 16 and secured by a fastener. 23 The honing sleeve 12 is fixed to the tool body 16. It can, for example, be pushed onto the tool body 16. The honing sleeve 12 can thus be removed by first removing the closure 23 and the spacer sleeve 22 from the tool body 16 and then pulling the honing sleeve 12 off the tool body 16 along its longitudinal axis. The honing sleeve 12 can be reassembled analogously in the reverse order of these steps.

[0057] Fig. 2 and Fig. 3Figure 10 shows a honing tool 10 in a cross-sectional view, whereby in this and all subsequent cross-sectional views the section is perpendicular to the longitudinal direction in the area of ​​the honing sleeve 12 (see also Fig. 1 ) has been drawn.

[0058] Fig. 2 shows the honing tool 10 with its honing sleeve 12 in an unexpanded state, whereas in the state according to Fig. 3 The honing sleeve 12 is expanded. Thus, the honing diameter D is in the state according to Fig. 3 greater than the one according to Fig. 2 .

[0059] The honing sleeve 12 is longitudinally slotted. Between its two free longitudinal edges 24 is therefore a longitudinal slot 26 formed. Due to the different honing diameters D, the longitudinal slot 26 is in the states according to Fig. 2 respectively Fig. 3 It is developed to varying degrees.

[0060] The honing sleeve 12 has a widening bar mount. 28to accommodate a widening strip 30 The expanding bar receptacle 28 is preferably formed on the inside of the honing sleeve 12. It is particularly preferably spaced apart from the two free longitudinal edges 24. Preferably, the expanding bar receptacle 28 is located opposite, or at least substantially opposite, the longitudinal slot 26. In this embodiment, the expanding bar receptacle 28 has a groove. 29 The expanding bar 30 is received in the groove 29. In this embodiment, the expanding bar receptacle 28, and in particular its groove 29, forms a two-sided stop for the expanding bar 30. This expanding bar 30 of the honing tool 10 is rotationally fixed, particularly with respect to rotation about the longitudinal direction, in the expanding bar receptacle 28.

[0061] The honing tool 10 also has two further widening bars 30.

[0062] The expansion strips 30 run parallel to the longitudinal direction, i.e., in the representation according to Fig. 2 or Fig. 3 perpendicular to the image plane.

[0063] The expanding mandrel 18 has several, in particular three, expanding surfaces in the area of ​​its front end, i.e. the end opposite the rear end. 34 The expanding mandrel 18 tapers from back to front in the area of ​​these expanding surfaces 34. In particular, its front end forms a triangle in cross-section. Thus, the expanding mandrel 18 has bevels along the expanding surfaces 34.

[0064] The expansion bars 30 each rest with one of their side surfaces against one of the expansion surfaces 34 of the expansion mandrel 18. The side surfaces and the expansion surfaces 34 are designed to correspond to each other.

[0065] In the state of the honing tool 10 according to Fig. 3 The expanding mandrel 18 is inserted deeper into the honing tool 10 than in the state according to Fig. 2 .

[0066] Due to the slopes formed by the widening surfaces 34, the following conditions apply: Fig. 3 the expansion strips 30 compared to the condition according to Fig. 2 radially outwards displaced. Thus, in the state according to Fig. 3 The honing sleeve 12 is widened by the widening bars 30.

[0067] The widening is also evident in the fact that the two free longitudinal edges 24 in the state according to Fig. 3 are further apart than in the state according to Fig. 2 and accordingly the longitudinal slot 26 in the state according to Fig. 3 is wider than in the state according to Fig. 2 .

[0068] In groove 29 is the one according to Fig. 2 and Fig. 3The upwardly pointing expanding bar 30, i.e., the expanding bar 30 held in the expanding bar receptacle 28, is fixed against the honing sleeve 12 in a rotationally fixed manner during both clockwise and counterclockwise rotations (in the respective plane of the image) of the honing tool 10. Thus, when the tool body 16 rotates, the honing sleeve 12 can be driven by this expanding bar 30. An additional projection, particularly in the area of ​​the longitudinal edges 24, is not required.

[0069] It can also be seen that the tool body 16 is essentially cylindrical. Deviating from a completely cylindrical shape, it has a flattened section. 36 trained. The flattening 36 is designed to complement the widening ridge receptacle 28.

[0070] In comparison of the Fig. 2 with the Fig. 3 It can also be seen that the honing sleeve 12 during the expansion, i.e. during the transition from the state according to Fig. 2 to the state according to Fig. 3 , on the outer side surfaces of the two - according to Fig. 2 and Fig. 3 - can slide along the lower widening strips 30.

[0071] Fig. 4 shows a comparison with the honing tool 10 of the Fig. 2 and the Fig. 3 modified honing tool 10, in particular with a modified honing sleeve 12.

[0072] On the tool body 16, sliding surfaces are provided in the area of ​​the longitudinal slot 26 and thus preferably opposite the expanding bar receptacle 28. 40 trained.

[0073] When the honing sleeve 12 is widened, it slides, particularly in the area of ​​the free longitudinal edges 24, by means of sliding lugs. 42 on these sliding surfaces 40.

[0074] It can be seen that the sliding surfaces 40 are formed at an angle to each other in cross-section.

[0075] The sliding surfaces 40 can be curved or flat in cross-section. In particular, they can be curved such that the honing sleeve 12 retains a circular cross-section, or at least a substantially circular cross-section, when expanded.

[0076] As from Fig. 4 As can be further seen, in this embodiment the two lower expansion strips 30 (see Fig. 2 ) can be dispensed with.

[0077] In particular, the honing tool 10 in this embodiment thus has only a single expanding bar 30. The tool body 16 therefore exhibits improved stability and / or fracture resistance compared to embodiments with multiple expanding bars. This embodiment with a single expanding bar 30, and generally embodiments with few expanding bars 30, can therefore be advantageously used for honing tools 10 for small honing diameters D ( Fig. 1), for example, of a maximum of 10 mm, particularly preferably 5 mm.

[0078] Fig. 5 and Fig. 6 show another embodiment of a honing tool 10 with a honing sleeve 12a Each in a cross-sectional view. Again, the two representations differ in... Fig. 5 or Fig. 6 in the state of the honing tool 10. Accordingly, the honing diameter D in the state according to Fig. 6 greater than in the state according to Fig. 5 .

[0079] In contrast to the preceding embodiments according to Figs. 2 to 4 Instead of a reamer receptacle, a reamer 30 is arranged on the honing sleeve 12a, in particular attached to or formed thereon. In particular, in this embodiment, the honing tool 10 has a total of three reamers 30, one of which is formed on the honing sleeve 12a.

[0080] The other two, in Fig. 5 and Fig. 6The lower, expanding ribs 30, on the other hand, only contact the honing sleeve 12a with their outer side surfaces. They thus constitute additional expanding ribs 30. It is generally conceivable to provide fewer than two additional expanding ribs 30, in particular no additional expanding ribs 30, or more than two additional expanding ribs 30 in addition to the expanding rib 30 formed on the honing sleeve 12a.

[0081] Again, the expanding bars 30 rest against an expanding mandrel 18 on their inner side surfaces. To control the expanding bars 30 and thus the honing diameter D, the expanding mandrel 18 again has inclined surfaces by which expanding surfaces are formed on the expanding mandrel 18, analogous to the preceding embodiments.

[0082] Fig. 7 and Fig. 8 Figure 12 shows two different embodiments of honing sleeves 12, 12a, each in perspective view.

[0083] The honing sleeve 12 of the embodiment according to Fig. 7It features a flared flange receptacle 28. It thus corresponds to the embodiment of the honing sleeve 12 according to Fig. 2 and Fig. 3 It can therefore be used with a honing tool 10 according to Fig. 2 and Fig. 3 are used. Essentially, with the exception of the sliding noses 42 ( Fig. 4 ), the honing sleeve 12 also corresponds to the embodiment according to Fig. 4 .

[0084] In contrast, in the embodiment of the honing sleeve 12a according to Fig. 8 A widening strip 30 is formed on this strip. It thus corresponds to the embodiment of the honing sleeve 12a according to Fig. 5 and Fig. 6 . Such a honing sleeve 12a can therefore be honed with a honing tool 10 according to Fig. 5 and Fig. 6 be used.

[0085] The expansion bar 30 ( Fig. 8 ) protrudes in particular in a web-like manner from the inside of the honing sleeve 12a.

[0086] Both honing sleeves 12, 12a according to Fig. 7 respectively Fig. 8 They also have several cutouts. 44The recesses 44 can have an elongated shape. Preferably, they are evenly distributed over the respective outer surface of the honing sleeves 12, 12a.

[0087] The recesses 44 can be dimensioned such that a predefined elasticity of the respective honing sleeve 12, 12a is achieved.

[0088] The honing sleeves 12, 12a can be made of plastic and / or metal. In general, the honing sleeves 12, 12a can be made of and / or have an elastically deformable material.

[0089] Fig. 9 shows a longitudinal section view according to the section plane IX-IX according to Fig. 8 .

[0090] Two of the recesses 44, which are shown in the illustration according to Fig. 9 are partially obscured by the widening bar 30 of the honing sleeve 12a.

[0091] The expanding bar 30 has a slope corresponding to the expanding mandrel 18 associated with it (see Fig. 5 and associated description) complementary slope 38 on. In particular, the slope 38 runs at an angle alpha relative to the longitudinal direction of the honing sleeve 12a. The angle alpha is preferably between 0.5° and 10°, particularly preferably 1.5°.

[0092] Both honing sleeves 12, 12a are manufactured using a rapid prototyping process, in particular by means of 3D printing.

[0093] A process for manufacturing honing sleeves is described below. Fig. 10 explained in more detail.

[0094] This shows Fig. 10 a 3D printer 46, with the two honing sleeves 12', 12" They can be manufactured using 3D printing.

[0095] The honing sleeve 12" is located inside the honing sleeve 12'. Specifically, the honing sleeve 12" is manufactured within the honing sleeve 12'. For this purpose, the honing sleeve 12" has a smaller diameter than the honing sleeve 12'.

[0096] In the Fig. 10 In the depicted state, both honing sleeves 12', 12" are already honed to a height of h manufactured. A printhead 48 The 3D printer 46 produces another layer of the honing sleeves 12', 12" at height h.

[0097] Thus, both honing sleeves 12', 12" can be manufactured simultaneously or within the same manufacturing layer of the 3D printer 46 or its print head 48 and in particular layer by layer.

[0098] The travel distances of the print head 48 required for the production of the honing sleeves 12', 12" can be reduced by the nested arrangement of the two honing sleeves 12', 12" by the print head 48, in particular the travel distances for switching between the two honing sleeves 12', 12"". This significantly reduces the production time for the two honing sleeves 12', 12" compared to single, especially sequential, production. Reference symbol list

[0099] 10 Honing tool 12, 12a, 12', 12" Honing sleeve 14 Cutting medium 16 Tool body 18 Expanding mandrel 20 Indentation 22 Spacer sleeve 23 Closure 24 Longitudinal edge 26 Longitudinal slot 28 Expanding bar holder 29 Groove 30 Expanding bar 34 Expanding surface 36 Flattening 38 Bevel 40 Sliding surface 42 Sliding nose 44 Recess 46 3D printer 48 Print head alpha Angle D Honing diameter h Height IX-IX Cutting plane

Claims

1. Honing tool with a honing sleeve (12, 12', 12") with at least one honing diameter (D) that can be adjusted by means of an expansion bar (30) of the honing tool (10), wherein the honing sleeve (12, 12', 12") has an expansion bar receptacle (28) for receiving an expansion bar (30), and wherein the honing tool (10) has a tool body (16) on which the honing sleeve (12, 12', 12") is mounted, wherein the honing tool (10) has an expansion mandrel (18) for the adjustable expansion of the honing sleeve, and wherein a longitudinal slot (26) with two free longitudinal edges (24) is formed on the honing sleeve (12, 12', 12"), characterized in that exactly one expansion bar (30) is provided and two sliding surfaces (40) are formed on the tool body (16), along each of which a sliding nose (42) of the honing sleeve (12, 12', 12") can slide along during expansion of the honing sleeve (12, 12a, 12', 12"), wherein the sliding surfaces (40) are formed at an angle to each other in cross-section.

2. Honing tool according to claim 1, characterized in that the honing sleeve (12, 12', 12") has at least one recess (44).

3. Honing tool according to one of the preceding claims, characterized in that a cutting means (14) is formed and / or arranged on the outside of the honing sleeve (12, 12', 12").

4. Honing tool according to one of the preceding claims, characterized in that the honing sleeve (12, 12', 12") has at least two cutting areas separated from each other.

5. Honing tool according to one of the preceding claims, characterized in that the honing sleeve (12, 12', 12") can be removably arranged and / or is arranged on the honing tool (10).

6. Method for manufacturing a honing sleeve (12, 12', 12") on which an expansion bar is formed and / or which has an expansion bar receptacle (28), and on which at least one longitudinal slot (26) with two free longitudinal edges (24) is formed, for a honing tool (10), characterized in that several honing sleeves (12, 12', 12") are manufactured simultaneously by means of a 3D printer (46), wherein at least one of the honing sleeves (12, 12', 12") to be manufactured is arranged and / or manufactured inside another of the honing sleeves (12, 12', 12") 12") and the honing sleeves (12, 12', 12") have sliding noses (42) in the area of the two free longitudinal edges (24).