Device for stripping a lacquer-insulated wire

Abstract

The invention relates to a device (1) for stripping a lacquer-insulated wire, having a rotatably drivable carrier shaft (20) extending along an axis of rotation and an internal-cutting cutting tool (30) carried by the carrier shaft (20) coaxially with respect to the carrier shaft (20) and having a plurality of tool cutting edges (31) distributed about a predetermined machining diameter. The tool cutting edges (31) are fixed to the cutting tool (30) in a positionally invariable manner relative to the axis of rotation.

Description

[0001] DESCRIPTION

[0002] DEVICE FOR STRIPPING AN ENAMEL-INSULATED WIRE

[0003] The invention relates to a device for stripping a varnish-insulated wire, comprising a rotationally drivable carrier shaft and an internally cutting cutting tool with a plurality of tool cutting edges carried by the carrier shaft.

[0004] Generic devices for stripping enamel-insulated wires, e.g., enameled copper wires, are generally known from the prior art. Such devices comprise a stripping head driven in rotation by an electric motor and carrying a plurality of cutting tools or blades. The cutting tools are individually and continuously adjustable radially to strip wires with different outer diameters. The wire is manually inserted into the stripping head until a previously set length stop is reached. During this process, the cutting tools in the stripping head mill away the wire insulation. The wire is then withdrawn, and the process can be repeated with additional wires. In the simplest case, the cutting tools are designed as spring steel blades. For a longer service life or for difficult-to-handle copper wires, carbide blades are also used.

[0005] With the devices known from the state of the art, wires of different diameters can be stripped using individually continuously radially adjustable cutting tools. However, the individual adjustment of the cutting tools makes it almost impossible for all cutting tools to have the same radial machining diameter. This can result in the cutting tools being subjected to different loads during operation and therefore wearing out at different rates. Ultimately, the cutting tools have to be replaced more frequently and the service life of the device is reduced. Secondly, there is a risk that the insulating varnish cannot be completely removed with the existing devices. With enamel-insulated copper wire, a very small amount of material must be removed in addition to the enamel insulation in order to achieve complete removal.Consequently, very tight diameter tolerances of the cutting tools must be maintained to ensure that neither too little insulating varnish nor too much copper wire is removed. This requirement often cannot be satisfactorily met with manually adjustable cutting tools.

[0006] Based on the devices known from the prior art, the object of the invention is therefore to provide a device for stripping a varnish-insulated wire, with which wires of different diameters can be stripped and which ensures a high processing quality.

[0007] The object is achieved by a device having the features of independent claim 1. Advantageous or preferred embodiments are the subject of the dependent claims.

[0008] A device according to the invention for stripping a varnish-insulated wire comprises a rotationally drivable support shaft extending along a rotational axis and an internally cutting tool carried coaxially by the support shaft, having a plurality of cutting edges distributed around a predetermined machining diameter. When the cutting tool is mounted on the support shaft, the cutting edges are fixed in position relative to the rotational axis of the support shaft. The fixed position of the cutting edges therefore does not allow for individual radial adjustment of the cutting edges relative to the rotational axis of the support shaft.

[0009] In a preferred embodiment, the support shaft is a hollow shaft in order to accommodate the wire inserted into the cutting tool and the chips generated during the machining of the wire, i.e. the enamel insulation and the removed wire material. The support shaft can furthermore have one or more radial openings through which the removed chips can be removed from the support shaft to the outside. A length stop can additionally be provided within the support shaft, which limits the insertion length of the wire into the cutting tool or into the support shaft. The tool cutting edges are preferably designed such that they execute a skiving cut through which the resulting chips are removed away from the cutting tool and into the support shaft.For this purpose, the tool cutting edges can be inclined at a defined angle to the rotation axis in a longitudinal section through the rotation axis of the cutting tool and the respective tool cutting edge.

[0010] The fixed position of the cutting edges on the cutting tool, combined with the coaxial alignment of the cutting tool with respect to the support shaft, ensures that the radial distance between the cutting edges relative to the rotational axis of the cutting tool or the support shaft remains fixed. Since all cutting edges of a cutting tool are distributed around a predetermined machining diameter or are located on the same machining diameter, a enamel-insulated wire fed coaxially to the support shaft axis can be stripped extremely precisely using the internally cutting cutting tool, achieving a high machining quality. Furthermore, the multiple cutting edges wear evenly, which can increase the service life of the device.

[0011] The specified machining diameter, on which the cutting edges of the cutting tool are positioned, is matched to the diameter of the wire to be stripped. A change in the machining diameter (for example, in the case of a change in the diameter of the wire to be stripped) therefore requires a new cutting tool with cutting edges positioned at the desired machining diameter.

[0012] In order to be able to process different wire diameters, the device according to the invention can therefore comprise a set of several cutting tools in which the tool cutting edges are located on different processing diameters.

[0013] Each cutting tool can be designed in the form of a preferably round disc and accommodated with a defined fit in a cylindrical receiving opening in the support shaft that is open at the front. Alternatively, the shape of the disc can also be rectangular, square, polygonal, or the like, with the shape of the receiving opening in the support shaft being adapted to the shape of the cutting tool. The disc, with the tool cutting edges distributed around a central disc axis and fixed in position, can be manufactured with particularly high precision and, due to the defined fit, can be inserted into the receiving opening in the support shaft with a tight radial clearance corresponding to the fit.In the state in which the cutting tool sits in the receiving opening in the support shaft, the central disk axis coincides with the axis of rotation of the support shaft, so that the tool cutting edges lie on the specified machining diameter and are fixed in a fixed position relative to the axis of rotation of the support shaft.

[0014] Compared to a device in which the tool cutting edges must be individually adjusted to a machining diameter determined by the wire to be stripped, the machining quality can be significantly improved because only one cutting tool suitable for the diameter of the wire to be stripped needs to be attached to the support shaft. The mating fit enables a technically simple and reproducible replacement of a worn cutting tool, for example, or when the diameter of a wire to be stripped changes, with a new cutting tool.

[0015] In a preferred embodiment, the cutting tool is interchangeably fixed in the receiving opening, preferably by radial clamping. If the cutting tool is accommodated in a cylindrical receiving opening in the support shaft that is open at the front, the cutting tool can be easily replaced without having to dismantle a housing that may be arranged around the support shaft. Due to the fixed position of the tool cutting edges on the cutting tool, it is necessary to replace the cutting tool in order to be able to strip wires with different outer diameters. In a preferred embodiment, the cutting tool is clamped in the receiving opening by several, for example three, screws, for example grub screws. The screws are screwed into radial bores in the support shaft and engage in a V-shaped groove that runs around the cutting tool.The screw axes are advantageously aligned relative to the V-shaped groove in such a way that tightening the screws not only radially clamps the cutting tool but also pulls it axially down in the support shaft, e.g. against an axial stop in the support shaft or a bottom of the receiving opening, and thus ensures optimal connection between the cutting tool and the support shaft. In a preferred embodiment, the cutting tool is formed as a single piece from a preferably disc-shaped hard metal body in order to ensure a long service life, in which the tool cutting edges are incorporated. Alternatively, the cutting tool can be made from high-speed steel (HSS), polycrystalline diamond (PCD) or the like. The single-piece design of the cutting tool ensures the best possible positionally fixed fixation of the tool cutting edges on the cutting tool. If the tool cutting edges become worn, the entire cutting tool must therefore be replaced.Since the cutting edges, which are provided on the cutting tool in a fixed position, define the specified machining diameter, the machining diameter of the cutting tool can be adjusted to the diameter of the wire to be stripped. Changing the machining diameter therefore requires a new cutting tool with cutting edges positioned at the desired machining diameter.

[0016] Alternatively, the cutting tool can also be formed from a preferably disc-shaped base body and cutting inserts that are clearly fixed to the base body, for example in the form of platelets. In this case, it is sufficient if only the cutting inserts are made of cemented carbide, high-speed steel (HSS), polycrystalline diamond (PCD), or the like. The positionally fixed fixing of the tool cutting edges relative to the axis of rotation, which is crucial for high machining quality, can be achieved in this case, for example, by the cutting inserts being able to be arranged with reproducible positional accuracy using stops provided on the base body that are positionally fixed. For example, the cutting inserts can be arranged with form-fitting precision in receiving pockets formed on the base body. The cutting inserts can be fastened in the receiving pockets by screwing, soldering, or the like.This alternative embodiment allows for the replacement of only the worn cutting inserts, for example, instead of the entire cutting tool. To replace the cutting inserts, it may be necessary to first remove the base body from the carrier shaft, then replace the cutting inserts and then reinstall the base body equipped with the new cutting inserts into the carrier shaft. Due to the clearly defined position of the cutting inserts on the base body, however, adjustment of the cutting inserts or tool cutting edges relative to the rotation axis is also not necessary in this alternative embodiment, meaning that the tool cutting edges are always precisely positioned relative to the rotation axis even after the cutting inserts have been replaced. In this alternative embodiment, a change in the machining diameter can therefore be achieved by arranging new, suitable cutting inserts on the base body of the cutting tool.

[0017] The device preferably comprises a guide bushing, in particular a vertical one, positioned upstream of the cutting tool at a defined axial distance, which forms a feed channel leading to the cutting tool. The guide bushing ensures that the wire to be stripped is fed essentially coaxially to the axis of rotation of the cutting tool, thereby further improving processing quality. This is particularly important because the wires are often cut to a defined length before the actual stripping, which can cause the wires to bend and sometimes become curved in the area of ​​the wire ends, making consistently precise feeding to the cutting tool difficult or impossible.Advantageously, the guide bushing is arranged so that it can be axially adjusted, and the defined axial distance between the guide bushing and the cutting tool is kept as small as possible to ensure that the wire end moves as coaxially as possible to the rotation axis when fed toward the cutting tool. However, the axial distance between the guide bushing and the cutting tool is necessary to prevent frictional engagement and thus grinding of the cutting tool, which rotates with the carrier shaft, against the stationary guide bushing.

[0018] The feed channel can form a conical tapered section toward the cutting tool and a cylindrical guide section adjoining the conical tapered section. The conical tapered section facilitates the insertion of the wire into the guide bushing, particularly during rapid wire feeding in automated operation. The cylindrical guide section adjoining the tapered section can straighten bent wire ends, align the wire precisely coaxially with the rotational axis of the cutting tool, and ensure optimal wire guidance during the machining of the enamel insulation. Since the guidance of the wire during machining plays a decisive role in the processing quality of the wire, the axial length of the guide section is greater than the axial length of the conical tapered section in a preferred embodiment of the invention.

[0019] The device can comprise a housing surrounding the support shaft and holding the guide bushing. In a preferred embodiment, the housing has one or more radial openings in the area around the support shaft through which the enamel insulation and wire shavings removed from the wire can be removed, for example, via a suction unit attached to the housing.

[0020] In a preferred embodiment, the guide bush is received with a defined fitting fit in a cylindrical receiving opening in the housing. The receiving opening is preferably an axial end-face opening through which both the cutting tool and the guide bush can be inserted into the housing. Like the fitting fit of the cutting tool in the support shaft, the fitting fit of the guide bush is advantageously selected such that, on the one hand, a radial hold of the guide bush in the receiving opening in the housing is ensured, but on the other hand, axial displaceability in the direction of the cutting tool is still present. Preferably, the guide bush is substantially round and has a flat clamping surface on its outer circumference. The shape of the guide bush can alternatively be rectangular, square, polygonal, or the like, with the shape of the receiving opening being adapted accordingly.

[0021] In a preferred embodiment, the inner diameter of the guide bushing's receiving opening is larger than the outer diameter of the cutting tool. Due to the larger inner diameter of the receiving opening compared to the outer diameter of the cutting tool, the cutting tool can be easily replaced without having to disassemble the device housing by pulling the cutting tool axially through the receiving opening after loosening the clamping screws. This allows the device to be quickly and flexibly adapted to different wire diameters.

[0022] In a preferred embodiment, the guide bushing is replaceably fixed in the receiving opening in the housing, preferably by radial clamping. For this purpose, at least one radial bore can be provided in the housing, into which a screw is screwed, which can be actuated from the outer side of the housing. This screw presses against an outer peripheral surface or clamping surface of the guide bushing and clamps the guide bushing firmly in the receiving opening.

[0023] The support shaft preferably has a connecting flange at its end section facing away from the cutting tool for connection to a drive shaft of a drive motor. The connecting flange can, in particular, serve to absorb the torque generated by the drive motor by means of a force-locking connection.

[0024] In a preferred embodiment, the carrier shaft has, at its end section facing away from the cutting tool, a cylindrical centering pin projecting axially beyond the connecting flange for positioning relative to the drive shaft of the drive machine.

[0025] The device can have a drive motor that drives the carrier shaft and an adapter that is mounted on a drive shaft of the drive motor and to which the carrier shaft is flanged. The adapter is preferably fastened to the connecting flange of the carrier shaft by means of a screw connection. For this purpose, a plurality of through axial bores can be formed in the connecting flange, into which screws are screwed, which are screwed into threaded bores formed in the adapter and clamp the adapter axially against the connecting flange. To transmit the torque from the drive shaft to the adapter, the drive shaft can have an inclined surface against which a threaded pin that is screwed essentially radially to the adapter presses in order to clamp the drive shaft to the adapter.

[0026] In a preferred embodiment, the centering pin is centered in a centering opening of the adapter facing the carrier shaft.

[0027] The centering pin can be centered in the centering opening, preferably by radial clamping. For this purpose, the adapter can have a plurality of radial bores into which screws are screwed, which press against the centering pin of the carrier shaft on the outer circumference.

[0028] In a preferred embodiment, the housing is attached axially to an adapter plate of the drive motor at the front end. Preferably, the housing of the support shaft and the adapter plate of the drive motor are clamped together by screws that are screwed into the housing of the support shaft and press radially against the adapter plate of the drive motor.

[0029] In a preferred embodiment, the device according to the invention comprises the above-mentioned components of the support shaft, the cutting tool held by the support shaft, the guide bushing positioned upstream of the cutting tool, and the housing surrounding the support shaft and holding the guide bushing. The device, assembled from these components, forms a modularly constructed complete tool that can be easily and flexibly adapted to a given wire or processing diameter.

[0030] A preferred embodiment of a device according to the invention is described below with the aid of the accompanying drawings. It shows:

[0031] Fig. 1 is a sectional view along a longitudinal central axis of a device according to the invention for stripping a varnish-insulated wire;

[0032] Fig. 2 is a perspective view of the device according to the invention;

[0033] Fig. 3 is a front view of the device according to the invention;

[0034] Fig. 3a is a side view of the device according to the invention;

[0035] Fig. 3b is a sectional view of the device according to the invention along the line AA in Fig. 3;

[0036] Fig. 4 is a side view of a drive motor of the device according to the invention;

[0037] Fig. 5 is a front view of a cutting tool of the device according to the invention;

[0038] Fig. 5a is a sectional view taken along line FF in Fig. 5;

[0039] Fig. 5b is a sectional view along the line GG in Fig. 5a;

[0040] Fig. 5c is a detailed view of area H in Fig. 5b;

[0041] Fig. 6 is a front view of a guide bushing of the device according to the invention; and Fig. 7 is a sectional view along the line AA in Fig. 6.

[0042] 1 and 2 show a device 1 for stripping a varnish-insulated wire according to a preferred embodiment in a sectional view along a longitudinal central axis and in a perspective view, respectively. The modular device 1 has a drive motor in the form of an electric motor 3 with a drive shaft 5 for generating a torque. The electric motor 3 has an adapter plate 7 on the side of the drive shaft 5 on the axial end face for connecting a housing 50, which will be described later. The torque of the electric motor 3 is transmitted to a support shaft 20 via an adapter 10. The support shaft 20 carries, at its end facing away from the electric motor 3, a detachably attached cutting tool 30 for stripping or removing the varnish insulation from the wire. At its axially forward end, the device 1 has a guide bushing 40 for inserting and guiding the wire to be stripped (not shown in Fig. 1).The guide bushing 40 is detachably secured in the housing 50, which houses the support shaft 20 and the adapter 10. Fig. 1 also schematically shows a suction unit 60 for extracting the insulating varnish stripped from the wire or the removed wire material.

[0043] In the following, the individual components of the device 1 according to the invention and their mode of operation are discussed in more detail with reference to Figs. 1 to 7.

[0044] As shown in Fig. 1 and 3b, the device 1 has the stationary guide bushing 40 arranged in front of the cutting tool 30 at a defined axial distance. The guide bushing 40 is shown in detail in Fig. 6 and 7 and forms a feed channel leading to the cutting tool 30. The guide bushing 40 ensures that the wire to be stripped is fed essentially coaxially to the axis of rotation of the cutting tool 30, whereby a high processing quality can be achieved. This is particularly important since the wires are often cut to a defined length before the actual stripping, which can cause the wires to bend and are sometimes curved in the area of ​​the wire ends, which makes consistently precise feeding to the cutting tool difficult or impossible.As shown in Figure 7, the feed channel forms a conical tapered section 42 and a cylindrical guide section 44 adjoining the conical tapered section 42. The conical tapered section 42 facilitates the insertion of the wire into the guide bushing 40, particularly during rapid feeding of wires in automated operation. In the preferred embodiment, the tapered section 42 is formed from a first tapered section with a first cone angle α and a second tapered section with a second cone angle β. The cone angle α of the first tapered section is greater than the cone angle β of the second tapered section in order to make the insertion of the wire into the guide bushing even easier.The cylindrical guide section 44 adjoining the tapered section 42 can straighten bent wire ends, align the wire precisely coaxially with the rotational axis of the cutting tool 30, and ensure optimal wire guidance during the machining of the enamel insulation. Since the guidance of the wire during machining plays a decisive role in the processing quality of the wire, an axial length L44 of the guide section 44 is, in the preferred embodiment, greater than an axial length L42 of the conical tapered section 42.

[0045] In the preferred embodiment shown, the guide bushing 40 is received with a defined mating fit (clearance fit) in a cylindrical receiving opening 52 in the housing 50. The receiving opening 52 is an axially frontal opening through which both the cutting tool 30 and the guide bushing 40 can be inserted into the housing 50.

[0046] The fit of the guide bushing 40 is advantageously selected such that, on the one hand, a radial hold of the guide bushing 40 in the receiving opening 52 in the housing 50 is ensured, but, on the other hand, an axial displaceability in the direction of the cutting tool 30 is still present in order to adjust the position of the guide bushing 40. As shown in Fig. 6, the outer contour of the guide bushing 40 is round except for a flat clamping surface 41 and has an outer diameter Ü40.

[0047] In the preferred embodiment, the guide bushing 40 is interchangeably fixed in the receiving opening 52 in the housing 50 by radial clamping. For this purpose, a radial bore 53 is provided in the housing 50, into which a screw 54 is screwed, which can be actuated from the outer side of the housing 50. This screw 54 presses against the clamping surface 41 of the guide bushing 40 and clamps the guide bushing 40 firmly in the receiving opening 52.

[0048] The guide bushing 40 is arranged in the receiving opening 52 in the housing 50 in an axially adjustable manner, with a defined axial distance of the guide bushing 40 from the cutting tool 30 being kept as small as possible to ensure that the wire end is moved as coaxially as possible to the rotational axis of the cutting tool 30 when fed toward the cutting tool 30. However, the axial distance between the guide bushing 40 and the cutting tool 30 is necessary to prevent frictional engagement and thus grinding of the cutting tool 30, which rotates with the carrier shaft 20, against the stationary guide bushing 40.

[0049] In the preferred embodiment shown, the support shaft 20 is a hollow shaft in order to be able to accommodate the wire inserted through the guide bushing 40 into the cutting tool 30 and the chips generated during the machining of the wire, i.e. the enamel insulation and the removed wire material. The support shaft 20 has a radial opening 21 in the area axially behind the cutting tool 30, through which the removed chips can be discharged from the support shaft 20 to the outside. In the area around the support shaft 20, the housing 50 has one or more radial openings 54 through which the enamel insulation removed from the wire and wire chips emerging from the radial opening 21 of the support shaft 20 can be removed via a suction unit 60 attached to the housing 50.

[0050] The cutting tool 30, which is shown in detail in Figs. 5 to 5c, is in the form of a round disk with an outer diameter D30 and is received with a defined fit in a cylindrical receiving opening 22 in the support shaft 20 that is open at the end. The cutting tool 30 has four tool cutting edges 31 that are evenly distributed around the circumference of the cutting tool 30 and are equidistant from a rotational axis 33 of the cutting tool 30. The tool cutting edges 31 are designed to perform a skiving cut, through which the chips generated during machining (the enamel insulation and the wire material) are removed from the cutting tool 30 into the support shaft 20. As shown in Fig.As shown in Figure 5a, the peeling cut is achieved in that the tool cutting edges 31 do not run parallel to the rotational axis 33, but are inclined at a defined angle y, which in the embodiment shown is 0.25°, to the rotational axis of the cutting tool 30.

[0051] In the preferred embodiment shown, the cutting tool 30 is formed in one piece from hard metal to ensure a long service life. Due to the one-piece design of the cutting tool 30, the tool cutting edges 31 are fixed to the cutting tool 30 in a fixed position. The disc-shaped cutting tool 30, with the tool cutting edges 31 distributed around the specified machining diameter and fixed in a fixed position, can be manufactured with particularly high precision.

[0052] As shown in Figs. 1 and 3b, the cutting tool 30 is interchangeably fixed in the receiving opening 22 of the support shaft 20 by radial clamping and, due to the defined mating fit, is inserted into the receiving opening 22 in the support shaft 20 with a tight radial clearance corresponding to the mating fit. In particular, in the embodiment shown, the cutting tool 30 is clamped in the receiving opening 22 by three screws 35. The screws 35 are screwed into radial bores in the support shaft 20 and engage in a V-shaped groove 32 (see Fig. 5a) running around the cutting tool 30. The screw axes are advantageously aligned relative to the V-shaped groove 32 such that tightening of the screws 35, in addition to the radial clamping, ensures an axial downward pull of the cutting tool 30 in the support shaft 20 against a bottom 23 of the receiving opening 22 and thus an optimal connection of the cutting tool 30 and the support shaft 20.

[0053] In the preferred embodiment, an inner diameter of the receiving opening 52 of the guide bushing 40 is larger than the outer diameter D30 of the cutting tool 30. Due to the larger inner diameter of the receiving opening 52 compared to the outer diameter D30 of the cutting tool 30, the cutting tool 30 can be easily replaced without having to disassemble the housing 50 of the device 1 by axially pulling the cutting tool 30 out through the receiving opening 52 after loosening the screws 35. In this way, the device 1 can be quickly and flexibly adapted to different wire diameters by replacing the cutting tool 30.

[0054] The fixed position of the tool cutting edges 31 on the cutting tool 30, combined with the coaxial alignment of the cutting tool 30 with respect to the support shaft 20, ensures that the radial distance between the tool cutting edges 31 relative to the support shaft axis is fixed. Since all tool cutting edges 31 are distributed around a predetermined machining diameter or are located on the same machining diameter, a lacquer-insulated wire fed coaxially to the support shaft axis can be stripped extremely precisely using the internally cutting cutting tool 30, achieving a high machining quality. Furthermore, the multiple tool cutting edges 31 wear evenly, which can increase the service life of the device 1.

[0055] The support shaft 20 has a connecting flange 24 for connection to the adapter 10 at its end section facing away from the cutting tool 30. As shown in Fig. 3b, the adapter 10 is fastened to the connecting flange 24 of the support shaft 20 by means of a screw connection. For this purpose, a plurality of through axial bores are formed in the connecting flange 24, into which screws 25 are screwed. These screws are screwed into threaded bores formed in the adapter 10 and clamp the adapter 10 axially against the connecting flange 24. The connecting flange 24 serves in particular to absorb the torque generated by the electric motor 3 by means of a force-locking connection from the adapter 10.

[0056] At its end portion facing away from the cutting tool 30, the support shaft 20 has a cylindrical centering pin 26 projecting axially beyond the connecting flange 24, with which the support shaft 20 is centered relative to the adapter 10 and relative to the drive shaft 5 of the electric motor 3. The centering pin 26 is centered, in particular, in a centering opening 11 of the adapter 10 facing the support shaft 20.

[0057] The centering pin 26 is centered in the centering opening by radial clamping. For this purpose, the adapter 10 has a plurality of radial bores 12 into which screws 14 are screwed, which press against the centering pin 26 of the support shaft 20 on the outer circumference.

[0058] As shown in Fig. 1 and 4, the drive shaft 5 has an inclined surface 4 for transmitting the torque to the adapter 10, against which a threaded pin 15 screwed substantially radially to the adapter 10 presses in order to clamp the drive shaft 5 to the adapter 10.

[0059] The housing 50 of the support shaft 20 is attached axially to the end face of the adapter plate 7 of the electric motor 3. In particular, the housing 50 of the support shaft 20 and the adapter plate 7 are clamped together by screws 55, which are screwed into the housing 50 of the support shaft 20 and press radially against the adapter plate 7 of the electric motor 3.

[0060] In the preferred embodiment, the cutting tool 30 is formed entirely in one piece from a disk-shaped hard metal body into which the cutting edges are incorporated. Alternatively, the cutting tool can be formed from high-speed steel (HSS), polycrystalline diamond (PCD), or the like. In any case, the one-piece design of the cutting tool ensures that the cutting edges are clearly and permanently fixed to the cutting tool and relative to the support shaft axis. If the cutting edges become worn, the entire cutting tool must be replaced. Since the cutting edges, which are provided on the cutting tool in a positionally fixed manner, define the specified machining diameter, the machining diameter of the cutting tool can be adapted to the diameter of the wire to be stripped using the cutting tool used.A change in the machining diameter therefore requires a new cutting tool with cutting edges located on the desired machining diameter.

[0061] In order to be able to process different wire diameters, the device according to the invention can therefore comprise a set of several cutting tools, in which the tool cutting edges are located at different processing diameters. The above-mentioned components of the support shaft 20, the cutting tool 30 held by the support shaft 20, the guide bushing 40 positioned upstream of the cutting tool 30, and the housing 50 surrounding the support shaft 20 and holding the guide bushing 40 form a modularly constructed complete tool that can be easily and flexibly adapted to a given wire or processing diameter.

[0062] In another embodiment not shown, the cutting tool can be formed from a preferably disc-shaped base body and cutting inserts that are clearly fixed to the base body, for example in the form of platelets. In this case, it is sufficient if only the cutting inserts are made of hard metal, high-speed steel (HSS), polycrystalline diamond (PCD) or the like. The positionally fixed fixing of the tool cutting edges relative to the axis of rotation, which is crucial for high machining quality, can be achieved in this case, for example, by the cutting inserts being able to be arranged with reproducible positional accuracy by means of stops provided on the base body that are positionally fixed. For example, the cutting inserts can be arranged with positive-locking and precise positioning in receiving pockets formed on the base body. The cutting inserts can be fastened in the receiving pockets by screwing, soldering or the like.This alternative embodiment allows for the replacement of just the worn cutting inserts, for example, instead of the entire cutting tool. To replace the cutting inserts, it may be necessary to first remove the base body from the carrier shaft, then replace the cutting inserts, and then reinstall the base body equipped with the new cutting inserts into the carrier shaft. Due to the clearly defined position of the cutting inserts on the base body, however, adjustment of the cutting inserts or tool cutting edges relative to the rotation axis is also not necessary in this alternative embodiment, meaning that the tool cutting edges are always precisely positioned relative to the rotation axis even after the cutting inserts have been replaced. In this alternative embodiment, a change in the machining diameter can therefore be achieved by arranging new, suitable cutting inserts on the base body of the cutting tool. List of reference symbols.

[0063] D30 outer diameter

[0064] D40 outer diameter

[0065] L42 axial length

[0066] L44 axial length a cone angle ß cone angle

[0067] Y angle

[0068] I Device

[0069] 3 electric motor

[0070] 4 Inclined surface

[0071] 5 Drive shaft

[0072] 7 Adapter plate

[0073] 10 adapters

[0074] II Centering opening

[0075] 12 Radial bore

[0076] 14 Screw

[0077] 15 threaded pin

[0078] 20 carrier wave

[0079] 21 radial opening

[0080] 22 Receiving opening

[0081] 23 Floor

[0082] 24 Connecting flange

[0083] 25 Screw centering pin

[0084] Cutting tool

[0085] Tool cutting edge

[0086] Nut

[0087] axis of rotation

[0088] screw

[0089] Guide bushing

[0090] clamping surface

[0091] Tapering section

[0092] Guide section

[0093] Housing

[0094] Receiving opening

[0095] Radial bore

[0096] screw

[0097] screw

[0098] Suction unit

Claims

Claims 1. Device (1) for stripping a lacquer-insulated wire, comprising a rotatably driven carrier shaft (20) extending along an axis of rotation and an internally cutting cutting tool (30) carried coaxially to the carrier shaft (20) by the carrier shaft (20) with several cutting edges (31) distributed around a predetermined machining diameter, characterized in that the cutting edges (31) are fixed in position relative to the axis of rotation on the cutting tool (30).

2. Device (1) according to claim 1, characterized in that the cutting tool (30) is designed in the form of a round disc and is received with a defined joining fit in a cylindrical receiving opening (22) open at the end face in the carrier shaft (20).

3. Device (1 ) according to claim 2, characterized in that the cutting tool (30) is fixed in the receiving opening (22), preferably by radial clamping, in an interchangeable manner.

4. Device (1) according to one of the preceding claims, characterized in that the cutting tool (30) is formed in one piece from hard metal.

5. Device (1) according to one of the preceding claims, comprising a guide bushing (40) positioned in front of the cutting tool (30) at a defined axial distance, which forms a feed channel leading to the cutting tool (30).

6. Device (1 ) according to claim 5, characterized in that the feed channel to the cutting tool (30) forms a conical tapered section (42) and a cylindrical guide section (44) adjoining the conical tapered section (42).

7. Device (1) according to claim 5 or 6, comprising a housing (50) surrounding the carrier shaft (20) and holding the guide bushing (40).

8. Device (1 ) according to claim 7, characterized in that the guide bushing (40) is received with a defined joining fit in a cylindrical receiving opening (52) in the housing (50).

9. Device (1) according to claim 8, characterized in that an inner diameter of the receiving opening (52) is larger than an outer diameter (D30) of the cutting tool (30).

10. Device (1 ) according to claim 8 or 9, characterized in that the guide bushing (40) is fixed in the receiving opening (52) in the housing (50), preferably by radial clamping, in a replaceable manner.

11. Device (1) according to one of the preceding claims, characterized in that the carrier shaft (20) has a connecting flange (24) at its end section facing away from the cutting tool (30) for connection with a drive shaft (5) of a drive machine (3).

12. Device (1) according to claim 11, characterized in that the carrier shaft (20) has at its end section facing away from the cutting tool (30) a cylindrical centering pin (26) projecting axially beyond the connecting flange (24) for positioning relative to the drive shaft (5) of the drive machine (3).

13. Device (1 ) according to claim 11 or 12, characterized by a drive machine (3) driving the carrier shaft (20) and an adapter (10) mounted on a drive shaft (5) of the drive machine (3), to which the carrier shaft (20) is flanged.

14. Device (1 ) according to claim 12 or 13, characterized in that the centering pin (26) is centered in a centering opening (11 ) of the adapter (10) facing the carrier shaft (20).

15. Device (1 ) according to claim 14, characterized in that the centering pin (26) is centered in the centering opening (11), preferably by radial clamping.

16. Device (1 ) according to one of claims 11 to 15 in conjunction with one of claims 8 to 10, characterized in that the housing (50) is attached axially to an adapter plate (7) of the drive machine (3).

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