FR3065331A1 - CUTTING APPARATUS, ESPECIALLY FOR BENDING AN EXTENDED PART OF AN EXCELLENT PREDETERMINED CROSS SECTION, SUCH AS A MULTILAYER CABLE - Google Patents

Abstract

An elongate piece cutting apparatus (1) comprising a hollow body (2), a cutting device (5) and a base (4) supporting the cutting device (5), the hollow body (2) defining a through passage (3) for receiving the workpiece (20), the hollow body (2) and the base (4) being configured to be mounted relative to each other, rotatable about an axis (XX ') passing through the passage (3) therethrough and the cutting device (5) comprising a cutting blade (6) and a blade holder (7) carried by the base (4) integrally in rotation with the base (4), the cutting blade (6) being positionable on the blade holder (7) in a position in which it is at least partially projecting within a volume defined by the axial extension of said passage (3) crossing. The blade holder (7) forms with the cutting blade (6) a slide assembly on the base (4) and the apparatus (1) comprises for sliding movement of the blade holder (7) and the blade (6) associated cutting, sliding displacement guiding means (8, 9) respectively equipping the hollow body (2) and the cutting device (5).

Description

(57) Apparatus (1) for cutting an elongated part (20) comprising a hollow body (2), a cutting device (5) and a base (4) supporting the cutting device (5), the body ( 2) hollow delimiting a passage (3) passing through for receiving the part (20), the hollow body (2) and the base (4) being configured to be mounted, relative to one another, movable in rotation about an axis (XX ') passing through the through passage (3) and the cutting device (5) comprising a cutting blade (6) and a blade holder (7) carried by the base (4) so integral in rotation with the base (4), the cutting blade (6) being positionable on the blade holder (7) in a position in which it protrudes at least partially inside a volume defined by the extension axial of said through passage (3).

The blade holder (7) forms with the cutting blade (6) a sliding assembly on the base (4) and the apparatus (1) comprises, for sliding movement of the blade holder (7) and the blade (6) associated cutting, means (8, 9) for sliding guide movement fitted respectively to the hollow body (2) and the cutting device (5).

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FIELD OF THE INVENTION

The invention relates to a cutting device, in particular for stripping an elongated piece of any known predetermined cross section, such as a multilayer cable.

It relates more particularly to a cutting device comprising a hollow body, a cutting device and a support base for the cutting device, the to hollow body delimiting a through passage inside which the part is able to be introduced and held so fixed in rotation, the hollow body and the base carried by the hollow body being mounted, one relative to the other, movable in rotation about an axis passing through the through passage and the cutting device comprising a blade cutter and a blade holder carried by the base integrally in rotation with the base, the blade being positionable on the blade holder in a position in which it protrudes at least partially inside the through passage or a volume defined by the axial extension of said through passage to eliminate, by relative displacement in rotation of the hollow body and the base, preferably by rotation of the base around the body hollow, at least part of the external surface of the part

PRIOR ART

Many electrical cables, in particular so-called dry cables, in particular high density polyethylene, are made up, from their periphery towards their core, of layers respectively forming a sheath, a semiconductor layer, an insulating layer and a conductive core, the stripping having the function of eliminating at least one of said layers.

Although many cables have a circular section, in recent years the presence of non-circular cables has been noted. Such cables can have a particularly complex external peripheral shape with the presence of flats, hollows, bumps or the like. The stripping of cables with such complex shapes is not possible with traditional stripping devices without generating notches or the removal of a layer of extremely variable thickness in the product. The same is true when the cutting blade is a spring loaded sliding blade. In this case, we observe an irregular and too deep cut of the layer to be eliminated because a sliding blade loaded by spring will always want to swallow more material. It is known to those skilled in the art to put a support stop to limit this cutting depth, but in this case the line of contact of the stop with the cable moves passing from front to behind the edge. cutting blade generating on the periphery of the cable too deep cutting areas and not deep enough or nonexistent cutting areas. The stripping pliers type solutions can be envisaged on cables whose layers are not integral with one another, called peelable. Only solutions of the planer type which entail a punctual removal on layers integral with one another, called non-peelable, are possible, but the implementation of such solutions leads to an increase in the time required for cutting and a poor finish on the connection of stopping the cut and a succession of flat in the longitudinal cable, which requires finishing by sanding.

GOALS AND SUMMARY

An object of the invention is to provide a cutting device whose design allows to strip a cable of non-circular cross section by allowing the cutting of a strip of material of controlled thickness in the form of a spiral winding.

To this end, the subject of the invention is a cutting device, in particular for stripping an elongated piece of any known predetermined cross section, such as a multilayer cable, said device comprising a hollow body, a cutting device. and a support base for the cutting device, the hollow body delimiting a through passage inside which the part is capable of being inserted and fixedly fixed in rotation, the hollow body and the base being configured to be mounted, the one with respect to the other, movable in rotation about an axis passing through the through passage, and the cutting device comprising a cutting blade and a blade holder carried by the base in rotation with the base, the cutting blade being positionable on the blade holder in a position in which it at least partially projects inside the through passage or a volume defined by the extension ent axial of said through passage to eliminate, by relative displacement in rotation of the hollow body and the base, preferably by rotation of the base around the hollow body, at least part of the external surface of the part, characterized in that the blade holder forms with the cutting blade a sliding assembly which, in the state driven in relative displacement in rotation of the base and the hollow body over at least 360 °, is mounted on the movable sliding base in a direction orthogonal to the relative axis of rotation of the base and the hollow body, on the one hand in the direction of a spacing, on the other hand in the direction of a bringing together of the cutting blade, of the axis of relative rotation of the base and of the hollow body, and in that the apparatus comprises, for the sliding movement of the blade holder and of the associated cutting blade, sliding displacement guide means equipping the hollow body and the device respectively neck eg.

The design of the cutting apparatus thus allows, in parallel with the relative rotational drive of the hollow body and the base, in particular in parallel with the rotational drive of the base and the associated blade holder with respect to the hollow body, a sliding movement of the blade holder and of the associated blade in a direction orthogonal to the relative axis of rotation of the base and of the hollow body on the one hand, in the direction of a separation of the blade from section of the axis of relative rotation of the base and the hollow body, on the other hand, in the direction of bringing the cutting blade closer to the axis of relative rotation of the base and the hollow body, to allow at least one movement of separation and one movement of approximation of the cutting blade, of the axis of relative rotation of the base and of the hollow body, in order to allow on a rotation of rotation of the base, the follow-up by the cutting blade, in particular by the cutting edge of the cutting blade, d a predefined shape loop path allowing the stripping of a cable in which the result of said stripping is substantially homothetic shape of the shape of the loop.

According to one embodiment of the invention, the sliding displacement guide means equipping the hollow body and the cutting device respectively comprise a guide path formed on the hollow body, and a follower element of said guide path equipping the cutting device, the guide path forming a loop surrounding the through passage of said hollow body and having a trace of the loop according to the desired path for the cutting blade.

The fact that the guide means comprise a guide path or cam path produced in the form of a closed loop circuit around the through passage of the hollow body and that this guide path is capable of being traversed by a follower element during relative displacement in rotation of the hollow body and the base allow the blade holder and the associated blade fitted to the base to be guided continuously on a rotation of the base. This results in precise guiding of the blade and of the associated blade holder and consequently the production of a precise cut.

According to one embodiment of the invention, the guide path formed on the hollow body takes the form of a groove surrounding the through passage of said hollow body and the follower element of said guide path equipping the cutting device, preferably the blade holder of the cutting device, assumes the shape of a finger or an insertable axis in said groove

Alternatively, the guide path formed on the hollow body takes the form of a rib surrounding the through passage of said hollow body and the follower element of said guide path fitted to the cutting device, preferably the blade holder of the cutting device. cut, takes the form of a positionable hook, in the manner of a jumper, straddling said rib.

According to one embodiment of the invention, the through passage of the hollow body has an internal circumferential shape complementary to the known predetermined external circumferential shape of the piece to be cut, in particular to be stripped.

îo As a variant, the through passage of the hollow body is equipped with radial members for holding the piece to be cut in position inside said through passage, said radial members being adjustable members in position capable of projecting more or less the interior of said through passage. The presence of these radial members allows using the same hollow body to cut cables of homothetic external circumferential shape.

According to one embodiment of the invention, said hollow body is formed of at least two elements, said elements preferably comprising at least one socket and a socket holder inside which the socket is capable of being mounted so removable, the through passage of the hollow body and the guide means equipping the hollow body being arranged at the socket. This results in the possibility, by simply replacing the socket with a new socket, of cutting a piece of different cross section.

According to one embodiment of the invention, the cutting blade is mounted on the adjustable blade holder in position in a direction parallel to the direction of sliding movement of the blade holder on the base and the guide means equipping the device cutters are arranged on the blade holder of the cutting device. This adjustable mounting in position of the blade on the blade holder allows adjustment of the cutting depth.

According to one embodiment of the invention, the cutting blade has a leading or leading edge and an opposite rear edge, the leading or leading edge of the cutting blade being formed by a cutting edge extending , over at least part of its length, parallel to the relative axis of rotation of the base and the hollow body, the leading edge being connected to the rear edge by a concave profile of the concavity cutting blade turned towards the through passage, said concave profile forming a clearance capable of preventing a tailgating of the cutting blade.

According to one embodiment of the invention, the base comprises a plate îo provided with a through hole so that it can be threaded onto the hollow body and extend around the through passage of said hollow body, this plate being provided, on the one of its faces, of the blade holder and, preferably, of a handle for rotating the base, said handle projecting from said face.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be clearly understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

FIG. 1 represents a sectional view of a cutting device according to the invention in the inserted state of a cable inside the through passage,

FIG. 2 represents a perspective view of the cutting apparatus of FIG. 1,

FIG. 3 represents a view in partially exploded position of the elements constituting a cutting apparatus according to the invention,

FIG. 4 represents two top views taken from the base side, of a cutting device according to the invention, the through passage of the figure on the left being provided, for holding said cable in a fixed manner in rotation inside said passage, of radial members while the through passage of the figure on the right has, for maintaining the cable in a fixed manner in rotation inside said passage, an internal circumferential shape complementary to the external circumferential shape of the cable,

FIG. 5 represents a partial perspective view of a hollow body equipped with a rib-type guide path engaged with a hook of the blade holder, to FIG. 6 represents a partial sectional view of a hollow body equipped with '' a rib-type guide path engaged with a blade holder hook,

FIG. 7 represents four top views taken from the base side, of a cutting device according to the invention, said views read in a clockwise direction illustrating the sliding movement of the blade holder and of the associated blade on the one hand, in the direction of approximation, on the other hand, in the direction of a separation of the axis of rotation of the base, during the rotation of the base over 360 °.

DETAILED DESCRIPTION

As mentioned above, the cutting device 1 is more particularly intended for cutting, in particular for stripping an elongated piece 20.

In the example shown, this elongated part 20 is a multilayer cable whose external layer to be removed is a semiconductor layer covering an insulating layer, this insulating layer surrounding a conductive core.

This elongated part 20 generally has a complex, non-circular external circumferential shape, preventing the use of a traditional cutting device, this circumferential shape being predetermined known.

This cutting device 1 comprises a hollow body 2, a cutting device 5 and a base 4 supporting the cutting device 5. The hollow body 2 delimits a through passage 3, inside which the part 20 is capable of being introduced from one end of said hollow body 2, to project on the opposite end side of said hollow body 2.

This part 20 is fixedly kept in rotation inside the hollow body 2. The hollow body 2 is able to be moved axially along the part 20 to the cut.

In the example shown in the figures, the hollow body 2 is formed of two coaxial tubular elements. These elements include a socket 21 and a socket holder 22 inside which the socket 21 is adapted to be removably mounted.

The passage 3 passing through the hollow body 2 is arranged at the socket 21.

To allow the part 20 to be cut to remain fixed in rotation inside the hollow body 2, the passage 3 passing through from the hollow body 2 may have an internal circumferential shape, complementary to the predetermined external circumferential shape known from part 20 to cut, as illustrated in the right-hand drawing of FIG. 4. Thus, since the hollow body is not circular, the mere fact of threading the part 20 in the passage 3 passing through the body 2 ensures that it remains fixed in rotation.

As a variant, and as illustrated in the drawing on the left in FIG. 4, the passage 3 passing through the hollow body 2 can be equipped with radial members 10 for holding the part 20 to be cut in position inside said passage passing through, said radial members 10 being members adjustable in position, capable of projecting more or less inside said passage 3 passing through. These radial members 10, which form clamping jaws, are thus slidingly moved to a position in abutment against the external surface of the part to be cut.

In the example shown, there are three radial members 10 and are distributed circumferentially around the inner periphery of said through passage.

The hollow body 2 and the base 4 are configured to be mounted one relative to the other, movable in rotation about an axis XX ’longitudinal of the passage 3 passing through. The hollow body 2 and the base 4 are therefore, in the configuration of use of the cutting apparatus, arranged coaxial.

To allow this relative rotation movement of the hollow body 2 and the base 4, a rolling member 12, interposed between the base 4 and the hollow body 2 is provided. Thus, this rolling member 12, threaded onto the hollow body 2, has two coaxial rings, namely an inner ring and an outer ring, capable of rotating relative to one another. The base 4 is mounted integral in rotation with the external ring of the rolling member 12, while the hollow body 2 is mounted integral in rotation with the internal ring of the rolling member 12. Thus, in the configuration of use of the device, the hollow body 2 can be fixed and the base 4 rotate around the hollow body 2. Obviously, the reverse can be envisaged, namely the fixed base 4 and the hollow body 2 rotating relative to the base 4.

In the example shown, the base 4 comprises a plate 41 provided with a through hole 411 so that it can be threaded onto the hollow body 2 and extend around the passage 3 passing through the hollow body 2, while being coupled to the outer ring of the rolling member 12.

This plate 41 is held by clamping integral with the outer ring of the rolling member 12 whose inner ring is fixed by clamping to the hollow body 2 ίο. The flange of the plate 41 is shown at 42 in the figures. This plate 41 has one of its faces, called from below, facing the end of the through passage of the hollow body 2 called the inlet of the through passage 3 and corresponding to the end by which the part is introduced into said through passage 3 . This plate 41 has its other face, called the top, facing the end of the passage 3 passing through the hollow body 2 called the exit from the through passage and corresponding to the end by which the piece 20 to be cut projects from the through passage up to coming into abutment against a part of the cutting device 5 carried by the top face of said plate 41.

This face of the top of the plate 41 is also equipped with a handle 11 for driving the base 4 in rotation around the hollow body 2, this handle 11 being in the form of an elongated body extending perpendicular to the face. from above the plate and mounted free to rotate on said plate, preferably around an axis parallel to the axis XX 'of relative rotation of the hollow body 2 and the base 4.

The cutting device 5 comprises a cutting blade 6 and a blade holder 7 carried by the base 4 in rotation with the base 4. Thus, the rotation drive of the base 4 around the axis XX ' causes the cutting blade 6 and the blade holder 7 to rotate about said axis XX '.

The cutting blade 6 is positionable on the blade holder 7, in a position in which it at least partially projects inside the passage 3 passing through or of a volume defined by the axial extension of said passage 3 passing through, to eliminate by relative displacement in rotation of the hollow body 2 and of the base 4, in particular by rotation of the base 4 around the hollow body 2, at least part of the external surface of the part 20.

In the example shown, the cutting blade 6 projects into the volume which extends in the axial extension of the passage 3 passing through, at the outlet end side of the part 20 to be cut from said passage 3 passing through.

In the example shown, the cutting blade 6 is mounted on the blade holder 7 adjustable in position in a direction parallel to the sliding direction of movement of the blade holder 7 on the base 4. This adjustment in position makes it possible to adjust the cutting depth of the cutting blade 6. To allow this adjustment in position, the cutting blade 6 is equipped with a threaded housing fixed in rotation and the blade holder 7 is equipped with a wheel 13 disposed at one end of a threaded rod, the other end of the threaded rod îo engaging with the threaded housing of the cutting blade 6. Thus, the rotational movement of the wheel 13 causes in parallel an axial movement of the cutting blade 6, to allow it to project more or less in the volume defined by the axial extension of the through passage.

This volume defined by the axial extension of the through passage corresponds to the volume defined by the projection of said through passage 3 on a plane orthogonal to said passage and arranged opposite the outlet end of the through passage, spaced from the outlet end of said crossing passage.

In the example shown, the cutting blade 6 has a leading or leading edge 61, and an opposite rear edge 62. The leading or leading edge 61 of the cutting blade 6 is formed by a cutting edge extending over at least part of its length, parallel to the axis XX 'of relative rotation of the base 4 and of the body hollow. The leading edge 61 is connected to the rear edge 62 by a concave profile 63 of the cutting blade 6, with a concavity turned towards the through passage 3, said concave profile 63 forming a clearance capable of preventing a tailgating of the blade 6 from chopped off.

To allow the cutting blade 6 to follow a complex trajectory, other than perfectly circular, the cutting blade 6 and the blade holder 7 form an assembly mounted on the base 4 movable to slide, in a direction orthogonal to the axis XX 'of relative rotation of the base 4 and of the hollow body, on the one hand in the direction of a spacing, on the other hand in the direction of a bringing together of the cutting blade 6 of the axis XX' of relative rotation of the base 4 and the hollow body.

Thus, in the state driven in relative displacement in rotation of the hollow body and the base 4 over at least one rotation, the blade holder is able, in parallel with this relative displacement in rotation, to be driven in displacement at sliding.

To allow such sliding movement, the blade holder 7 is connected to the base 4 by suitable connecting means. These connecting means can affect a large number of forms. Thus, the blade holder 7 can be equipped, in the manner of a carriage, with rolling or sliding members, these members cooperating with rails carried by the base 4.

In the example shown, the blade holder 7 is provided with two oblong slots each crossed by a rod connecting the blade holder 7 to the base 4. Each rod is equipped with flats along which the longitudinal edges of the longitudinal light of the blade holder slide when sliding the blade holder moves.

The cutting apparatus 1 comprises, for sliding movement of the blade holder 7 and the cutting blade 6 in a controlled manner, in order to allow the cutting blade to follow a complex trajectory, means 8, 9 for guiding sliding movement equipping respectively the hollow body 2 and the cutting device 5, in particular here the blade holder 7 of the cutting device 5. The guide means 9 fitted to the cutting device 5 could be arranged on the cutting blade 6 when the depth is not adjustable.

These guide means 8, 9 allow the blade holder 7 and the associated cutting blade 6 to be moved, on the one hand, in the direction of a separation of the cutting blade 6 from the axis XX ' relative rotation of the base 4 and the hollow body 2, on the other hand, in the direction of bringing the cutting blade 6 closer to the axis XX 'of relative rotation of the base 4 and the hollow body 2, in the driven state of rotation of the base 4 and the hollow body 2 over at least 360 °, to allow the cutting blade 6 to follow the complex profile of the part 20 to be cut.

These means 8, 9 for sliding guide of the blade holder 7 and of the associated cutting blade 6 configured to allow, in the driven state îo in relative displacement in rotation of the base 4 and the hollow body 2, the sliding movement of the cutting blade 6 and the associated blade holder 7, firstly in the direction of a separation of the cutting blade from the axis XX 'of relative rotation of the base 4 and of the body 2 hollow, on the other hand in the direction of approximation of the cutting blade 6 of the axis XX 'of relative rotation of the base 4 and the hollow body 2, can affect a large number of shapes.

In the example shown in the figures, the means 8, 9 for sliding displacement guide fitted respectively to the hollow body 2 and the blade holder 7 comprise a guide path 8 formed on the hollow body 2 and a follower element 9 of said path 8 for guiding the blade holder 7.

The guide path 8 forms a loop, that is to say a closed circuit surrounding the passage 3 passing through said hollow body 2 and has a trace of the loop as a function of the desired path for the cutting blade 6. The follower element 9 is kept in permanent engagement with the guide path 8.

In the example shown in Figure 1, the guide path 8 formed on the hollow body 2 takes the form of a groove 81 surrounding the passage 3 passing through said hollow body 2 and the element 9 follower of said guide path 8 fitted the blade holder 7 takes the shape of a finger 91 or of an axis insertable in said groove 81.

Thus, in the inserted state of the finger 91 in the groove 81, the relative displacement in rotation of the base 4 and of the hollow body 2 causes, in a helical movement, in parallel a sliding movement of the cutting blade 6 and the associated blade holder 7, in the direction of approximation and spacing of the axis XX 'of relative rotation of the base 4 and the hollow body 2.

In the example shown in Figures 5 and 6, the guide path 8 formed on the hollow body 2 takes the form of a rib 82 surrounding the passage 3 passing through said hollow body 2 and the element 9 follower of said path 8 of guide fitted to the blade holder 7 takes the form of a positionable hook 92, in the manner of a jumper, straddling said rib 82.

The guide path 8 has a substantially homothetic profile of the profile of the part 20 to be cut. This guide path profile 8 can be defined empirically or by calculation, from the desired displacement for the cutting blade 6.

In the examples shown, the guide path 8 equipping the hollow body 2 is disposed at the sleeve 21, on an end face of the sleeve 21. Thus, for cutting a piece 20 to be cut having a new cross section, it suffices to change the bush 21 and replace it with a bush 21 fitted with a guide path corresponding to the new cross section of the part 20 to be cut.

To allow the cutting of an elongated part 20 using a cutting device 1 according to the invention, the procedure is as follows: the elongated part 20 is inserted into the passage 3 passing through the hollow body 2, until 'coming into abutment of the free end of the elongated part 20 against the cutting blade 6 of the cutting device 5. The base 4 supporting the cutting device 5 is rotated about the axis XX ′ passing through the passage 3 passing through it in a helical movement, while the hollow body 2 remains fixed in rotation. The base 4 supporting the cutting device 5 and the hollow body 2 thus tend, during this relative rotation drive, to advance axially along the part 20 to be cut. During the drive in rotation of the base 4, the cutting blade 6 and the blade holder 7 are driven in rotation about the axis XX ', and the cooperation of the follower element 9 equipping the blade holder 7 with the guide path 8 equipping the hollow body 2 causes the sliding blade 6 and the blade holder 7 to move in the direction of approach and spacing of the axis XX 'to follow the complex profile of the part 20 to be cut, eliminating a layer of material in the form of a helical drop. The rotary drive of the base 4 and of the associated cutting device 5 is continued until the layer of material on the desired piece length has been eliminated.

When an elongated part 20 having a different cross section must be cut, it suffices to replace the sleeve, before proceeding with the cutting operation as mentioned above.

Claims (10)

1. Apparatus (1) for cutting, in particular for stripping an elongated part (20) of any known predetermined cross section, such as a cable 5 multilayers, said apparatus (1) comprising a hollow body (2), a cutting device (5) and a base (4) supporting the cutting device (5), the hollow body (2) delimiting a passage (3) through which the part (20) is capable of being inserted and held fixed in rotation, the hollow body (2) and the base (4) being configured to be mounted, one relative to the other, movable in rotation about an axis (XX ¹ ) passing through the through passage (3), and the cutting device (5) comprising a cutting blade (6) and a blade holder (7) carried by the base (4) integral in rotation with the base (4), the cutting blade (6) being positionable on the blade holder (7) in a position in which it protrudes at least partially inside the passage (3) 15 through or of a volume defined by the axial extension of said through passage (3) to eliminate, by relative displacement in rotation of the hollow body (2) and the base (4), preferably by rotation of the base (4) around the hollow body (2), at least part of the external surface of the part (20), characterized in that the blade holder (7) forms with the cutting blade (6) a 20 sliding assembly which, in the driven state in relative displacement in rotation of the base (4) and the hollow body (2) over at least 360 °, is mounted on the base (4) movable in sliding in a direction orthogonal to the axis (XX ¹ ) of relative rotation of the base (4) and of the hollow body (2), on the one hand in the direction of a spacing, on the other hand in the direction of a bringing together of the blade (6) 25 of cutting, of the axis (XX ¹ ) of relative rotation of the base (4) and of the hollow body (2), and in that the apparatus (1) comprises, for the sliding movement of the blade holder (7) and the associated cutting blade (6), means (8, 9) for guiding in sliding movement equipping the hollow body (2) and the cutting device (5) respectively. 2. Cutting device (1) according to claim 1, characterized in that the sliding guide means (8, 9) for sliding displacement equipping the hollow body (2) and the cutting device (5) respectively comprise a path ( 8) guide formed on the hollow body (2), and a follower element (9) of said guide path (8) fitted to the cutting device (5), the guide path (8) forming a loop surrounding the passage 5 (3) passing through said hollow body (2) and presenting a trace of the loop as a function of the desired path for the cutting blade (6). 3. Apparatus (1) for cutting according to claim 2, characterized in that the guide path (8) formed on the hollow body (2) îo affects the shape of a groove (81) surrounding the passage (3) through of said hollow body (2) and in that the element (9) follower of said guide path (8) fitted to the cutting device (5), preferably the blade holder (7) of the cutting device (5), affects the shape of a finger (91) or of an insertable axis in said groove (81). 4. Apparatus (1) for cutting according to claim 2, characterized in that the guide path (8) formed on the hollow body (2) affects the shape of a rib (82) surrounding the passage (3) through said hollow body (2) and in that the element (9) follower of said guide path (8) 20 fitted to the cutting device (5), preferably the blade holder (7) of the cutting device 5), takes the form of a hook (92) which can be positioned, in the manner of a rider, astride said rib (82). 5. Cutting device (1) according to one of the preceding claims, 25 characterized in that the passage (3) passing through the hollow body (2) has an internal circumferential shape complementary to the known predetermined external circumferential shape of the part (20) to be cut, in particular to be stripped. 30 6. Apparatus (1) for cutting according to one of claims 1 to 4, characterized in that the passage (3) passing through the hollow body (2) is equipped with radial members (10) for holding the workpiece (20 ) to be cut in position inside said passage (3) passing through, said radial members (10) being members adjustable in position capable of projecting more or less inside said passage (3). 5 7. Apparatus (1) for cutting according to one of the preceding claims, characterized in that said hollow body (2) is formed of at least two elements, said elements preferably comprising at least one socket (21) and a door -socket (22) inside which the sleeve (21) is capable of being removably mounted, the passage (3) passing through the hollow body (2) and the guide means (8) equipping the body (2 ) hollow being arranged at the socket (21). 8. Apparatus (1) for cutting according to one of the preceding claims, characterized in that the cutting blade (6) is mounted on the blade holder (7) 15 adjustable in position in a direction parallel to the sliding direction of movement of the blade holder (7) on the base (4) and in that the guide means (9) fitted to the cutting device (5) are arranged on the blade holder (7) of the cutting device (5). 20 9. Apparatus (1) for cutting according to one of the preceding claims, characterized in that the cutting blade (6) has an edge (61) leading or leading and an edge (62) opposite rear, the edge ( 61) leading or leading to the cutting blade (6) being formed by a cutting edge extending, over at least part of its length, parallel to the axis (XX ¹ ) of relative rotation of the base 25 (4) and the hollow body (2), the leading edge (61) being connected to the rear edge (62) by a concave profile (63) of the concavity cutting blade (6) facing the passage ( 3) through, said concave profile (63) forming a clearance capable of preventing a tailgating of the cutting blade (6). 30 10. Apparatus (1) for cutting according to one of the preceding claims, characterized in that the base (4) comprises a plate (41) provided with an orifice (411) passing through so as to be able to be threaded onto the body (2) hollow and extend around the passage (3) passing through said hollow body (2), this plate (41) being provided, on one of its faces, with the blade holder (7) and, preferably, with a handle (11) for rotating the base (4), said handle (11) projecting from said face. 2/4 3/4