METHOD FOR REMOVING PART OF A SCREEN SHEET FROM A LINE CABLE CLADDING AND SHEET REMOVAL DEVICE ALLOWING THE REMOVAL OF PART OF A SCREEN SHEET FROM A LINE CABLE CLADDING AT A BREAK POINT IN THE LINE CABLE CLADDING

Abstract

A method for removing a portion of a shielding foil (4) of a sheathed cable (2) is proposed, the method comprising the following steps: providing the sheathed cable (2) with the shielding foil (4), wherein the shielding foil (4) has a predetermined breaking point (5) extending substantially along a circumference of the shielding foil (4); bending a portion of the sheathed cable (2) with the shielding foil (4) in a first direction to generate a tensile stress at the predetermined breaking point (5) on a portion of the circumference of the shielding foil (4) such that the shielding foil (4) tears at the predetermined breaking point (5) on a portion of the circumference of the shielding foil (4);Moving a first part of the sheathed cable (2) in a substantially elliptical, in particular circular, movement to generate a tearing stress over substantially the entire circumference of the shielding foil (4), so that the shielding foil (4) tears at the predetermined breaking point (5) over the entire circumference of the shielding foil (4); and removing the part of the shielding foil (4) separated from the sheathed cable (2).

Description

[0001] The present invention relates to a method for removing part of a shielding foil of a sheathed cable and a foil removal device for removing part of a shielding foil of a sheathed cable at a predetermined breaking point from the sheathed cable.

[0002] The shielding foil of a sheathed cable, which protects internal conductors from alternating electric fields, often needs to be cleanly separated and removed from the sheathed cable, i.e., without forming any tufts.

[0003] JP 3 469 398 B2 describes a device that perforates the shielding foil through the outer sheath of the cable using needles. Simultaneously, the outer sheath is cut at another point. After processing, the outer sheath and the shielding foil are pulled straight off the remaining cable. The shielding foil tears at the perforation. A disadvantage of this method is that, particularly if the shielding foil is made of, for example, plastic with a vapor-deposited metal layer, fraying can occur.

[0004] WO 2015 / 125 129 A describes a method for removing a shielding foil. If the shielding foil is made of a metallized plastic, the ductility of the foil means that the successful formation of a shear fracture or shear crack cannot be guaranteed. Therefore, the formation of flakes cannot be reliably ruled out.

[0005] WO 2014 / 001 716 A1 discloses a device in which the shielding foil is cut across its entire circumference using a laser beam, while the insulating layer of the inner cables or wires remains undamaged by the laser beam. A disadvantage of this is that cutting or removing the shielding foil takes a very long time.

[0006] Further prior art is known from US 6,631,554 B1, US 8,302,295 B2, WO 2008 / 084 216 A1, EP 2 828 030 A1, US 7,947,921 B2, US 6,509,547 B1 and EP 1 641 572 B1.

[0007] Among other things, there may be a need for a method for removing part of a shielding foil from a sheathed cable or for a foil removal device for removing part of a shielding foil from a sheathed cable at a predetermined breaking point, by means of which the shielding foil can be easily and quickly separated or removed without fraying.

[0008] Such a need can be met by a method for removing a portion of the shielding foil of a sheathed cable or a foil removal device for removing a portion of the shielding foil of a sheathed cable at a predetermined breaking point from the sheathed cable according to the independent claims. Advantageous embodiments are defined in the dependent claims.

[0009] According to a first aspect of the invention, a method for removing a portion of a shielding foil of a sheathed cable is proposed, the method comprising the following steps: providing the sheathed cable with the shielding foil, wherein the shielding foil has a predetermined breaking point extending substantially along a circumference of the shielding foil; bending a portion of the sheathed cable with the shielding foil in a first direction to generate a tearing stress at the predetermined breaking point on a portion of the circumference of the shielding foil such that the shielding foil tears at the predetermined breaking point on a portion of the circumference of the shielding foil; moving a first portion of the sheathed cable in a substantially elliptical, in particular circular, movement to generate a tearing stress over substantially the entire circumference of the shielding foil such that the shielding foil tears at the predetermined breaking point over the entire circumference of the shielding foil;and removing the portion of the shielding foil that has been separated from the sheathed cable.

[0010] One advantage of this method is that it reliably prevents the shielding foil from fraying. This means that the shielding foil tears only along the predetermined breaking point and does not tear anywhere else. Furthermore, the process can be carried out very quickly because the elliptical movement can be performed very rapidly. In addition, the process is technically very simple.

[0011] According to a second aspect of the invention, a foil removal device is proposed for removing a part of a shield foil of a sheathed cable at a predetermined breaking point from the sheathed cable, wherein the removal device comprises: - a bending gripper for gripping a first part of the sheathed cable and for holding the gripped first part of the sheathed cable such that the sheathed cable is at least partially in a bent state, so that a tearing stress is generated at the predetermined breaking point on a part of the circumference of the shield foil such that the shield foil tears at the predetermined breaking point on a part of the circumference of the shield foil;and - a rotary device for moving the bending gripper such that the first part of the sheathed cable is moved along an elliptical, in particular circular, path to generate a breaking stress over substantially the entire circumference of the shielding foil, so that the shielding foil tears at the predetermined breaking point over the entire circumference of the shielding foil.;

[0012] The advantage of this design is that when separating the shielding foil from the cable sheath using the foil removal device, fraying is reliably prevented. This ensures that the shielding foil tears only along the predetermined breaking point and that no other tears form. Furthermore, the foil removal device allows for very quick separation and removal of the shielding foil from the cable sheath. The foil removal device is also particularly cost-effective.

[0013] Possible features and advantages of embodiments of the invention can be considered, among other things and without limiting the invention, as being based on the ideas and findings described below.

[0014] According to one embodiment, the movement of the first part of the sheathed cable is carried out in an elliptical, and in particular circular, motion in a direction of rotation that is opposite to the winding direction of the shield foil along a circumference of the sheathed cable. An advantage of this is that, particularly if the inner part of the shield foil has a less dense perforation in the overlap area than the outer part of the shield foil in the overlap area, the tear at the predetermined breaking point is reliably directed into the inner part of the shield foil. Consequently, fraying, even in the overlap area of ​​the shield foil, is prevented even more reliably.

[0015] According to one embodiment, before the first part of the sheathed cable is moved in an elliptical motion, the shielding foil is pre-tensioned in the longitudinal direction of the sheathed cable. This ensures, in particular, that the shielding foil tears along the predetermined breaking point. Furthermore, the bending angle or deflection angle at which the sheathed cable is bent can be small. Thus, the method can also be carried out with particularly bend-sensitive sheathed cables without unintentionally damaging the cable.

[0016] According to one embodiment, the length of a bending section, in which the sheathed cable is bent by the elliptical movement of the first part of the sheathed cable, and / or the bending angle, in which the sheathed cable is bent by the elliptical movement of the first part of the sheathed cable, are adapted to the properties of the sheathed cable. This ensures particularly gentle handling of the sheathed cable during the removal of part of the shielding foil. Thus, unintentional damage to the sheathed cable is prevented even more reliably. The properties of the sheathed cable can, for example, include its bending stiffness.

[0017] According to one embodiment, the method further comprises the following step: Detaching the shielding foil, separated from the sheathed cable at the predetermined breaking point, from a bending gripper that holds the detached portion of the shielding foil, using compressed air and / or suction. The advantage of this method is that the detached portion of the shielding foil is easily removed from the bending gripper and / or from the sheathed cable.

[0018] According to one embodiment, a second part of the sheathed cable is gripped in such a way that the predetermined breaking point is located between the first and second parts of the sheathed cable. This reduces the length over which the sheathed cable is bent, thus providing even more reliable protection against unintentional damage. Furthermore, this reduces the angular deflection or bending of the sheathed cable required to tear the shielding foil at or along the predetermined breaking point, while maintaining the same tensile / breaking stress.

[0019] According to one embodiment, the first part of the sheathed cable is moved in an elliptical motion by means of a gimbal suspension. This makes it particularly easy to rotate the first part of the sheathed cable.

[0020] According to one embodiment, the first part of the sheathed cable is moved in an elliptical motion by means of the gimbal suspension such that the pivot point of the gimbal suspension lies on a plane in which the predetermined breaking point of the shield foil is located. This allows the sheathed cable to break particularly reliably at the predetermined breaking point, while at the same time minimizing movement of the portion of the sheathed cable moving in an elliptical shape. Consequently, the sheathed cable is particularly reliably protected against unintended damage.

[0021] According to one embodiment, the method further comprises the following step: creating the predetermined breaking point of the shielding foil by perforating the foil with holes and / or slots along its circumference. An advantage of this is that the predetermined breaking point is technically simple and particularly quick to produce.

[0022] According to one embodiment, in an overlapping area of ​​the shielding foil, where the shielding foil is arranged overlapping along a circumference of the sheathed cable, an outer part of the shielding foil, radially in the direction of the sheathed cable, is slot-perforated at the predetermined breaking point, and an inner part of the shielding foil, radially in the direction of the sheathed cable, is hole-perforated at the predetermined breaking point. The advantage of this is that the predetermined breaking point is technically simple to produce and tears particularly reliably without fraying.

[0023] According to one embodiment, the foil removal device further comprises an additional gripper for grasping a second part of the sheathed cable such that the predetermined breaking point is located between the additional gripper and the bending gripper. This reduces the length over which the sheathed cable is bent, thus providing even more reliable protection against unintentional damage. Furthermore, this reduces the angular deflection of the sheathed cable required to tear the shield foil at or along the predetermined breaking point, while maintaining the same tensile / breaking stress.

[0024] According to one embodiment, the foil removal device further comprises one or more blow-out openings in the bending gripper for blowing out a fluid to detach the shielding foil from the bending gripper and / or a suction device for extracting the shielding foil separated from the sheathed cable. The advantage of this is that the detached part of the shielding foil can be easily removed from the bending gripper and / or from the sheathed cable.

[0025] According to one embodiment of the foil removal device, the bending gripper has a frustoconical recess that widens away from the predetermined breaking point, in particular a frustoconical recess with an opening angle of less than or equal to approximately 4°. An advantage of this is that the bending gripper can hold the sheathed cable or a tip of the sheathed cable particularly securely.

[0026] According to one embodiment, the rotating device is designed such that the direction of rotation of the first part of the sheathed cable, when moving the first part along an elliptical, and in particular circular, path, can be adjusted to the winding direction of the shielding foil along the circumference of the sheathed cable. An advantage of this is that, particularly if the inner part of the shielding foil has a less dense perforation in the overlap area than the outer part of the shielding foil in the overlap area, the tear at the predetermined breaking point can be reliably directed into the inner part of the shielding foil. Consequently, fraying, even in the overlap area of ​​the shielding foil, is prevented even more reliably.

[0027] Elliptical motion can also be motion that only approximates an ellipse. In particular, elliptical motion can also be motion that does not have two foci, but where the motion along its path is continuous, i.e., it does not make any abrupt jumps. Elliptical motion can also be a type of wobbling motion.

[0028] It should be noted that some of the possible features and advantages of the invention are described herein with reference to different embodiments. A person skilled in the art will recognize that the features can be suitably combined, adapted, or exchanged to arrive at further embodiments of the invention.

[0029] Embodiments of the invention are described below with reference to the accompanying drawings, whereby neither the drawings nor the description are to be interpreted as limiting the invention. Fig. 1 shows a perspective view of a first embodiment of the foil removal device according to the invention; Fig. 2 shows a detailed view of a sheathed cable with a shielding foil having a predetermined breaking point; Fig. 3a shows a cross-sectional view of another sheathed cable; Fig. 3b shows a cross-sectional view of the sheathed cable made of Fig. 2 Fig. 4 shows a cross-sectional view of the film removal device made of Fig. 1 Fig. 5a shows a side view of the sheathed cable made of Fig. 2 before bending; Fig. 5b shows a side view of the sheathed cable made of Fig. 5a during bending before tearing the shielding foil at a predetermined breaking point; Fig. 5c shows a side view of the sheathed cable made of Fig. 5a or Fig. 5b during bending after tearing the shielding foil over part of the circumference of the shielding foil; Fig. 6a shows the foil removal device. Fig. 1 with the bending gripper in a basic position without a sheathed cable; Fig. 6b shows the foil removal device made of Fig. 6a , after rotating the bending gripper from the basic position; Fig. 6c shows the film removal device from Fig. 6a or Fig. 6b after rotating the bending gripper; Fig. 6d shows the film removal device. Fig. 6a or Fig. 6b or Fig. 6c after a further rotation of the bending gripper; and Fig. 6e shows the film removal device made of Fig. 6a or Fig. 6b or Fig. 6c or Fig. 6d after another rotation of the bending gripper.

[0030] The figures are schematic only and not to scale. Identical reference symbols in the different figures denote identical or equivalent features.

[0031] Fig. 1 shows a perspective view of a first embodiment of the film removal device according to the invention 1. Fig. 2 shows a detailed view of a sheathed cable 2 with a shielding foil 4 which has a predetermined breaking point 5. Fig. 3a shows a cross-sectional view of another sheathed cable 2. Fig. 3b shows a cross-sectional view of the sheathed cable 2 made of Fig. 2 . Fig. 4 shows a cross-sectional view of the film removal device 1 from Fig. 1 .

[0032] The foil removal device 1 is designed for removing a portion of a shielding foil 4 from a sheathed cable 2. For this purpose, the portion of the shielding foil 4 is separated from the remaining sheathed cable 2, or from the remaining portion of the shielding foil 4 that is and remains connected to the sheathed cable 2. The shielding foil 4 comprises metal for shielding electromagnetic radiation in and / or from the conductors of the sheathed cable 2 that run within the shielding foil 4. The shielding foil 4 essentially surrounds or encircles the conductors of the sheathed cable 2. The shielding foil 4 is very thin. In particular, the shielding foil can comprise or consist of a plastic with a vapor-deposited metal layer.

[0033] A predetermined breaking point 5 is formed at a location or in an area that runs essentially along the circumference of the shielding foil 4. The predetermined breaking point 5 can, for example, have a slot perforation and / or a hole perforation 6. The predetermined breaking point 5 can be formed using a laser beam and / or a mechanical cutting tool. The circumferential direction of the shielding foil 4 runs in Fig. 3a or Fig. 3b in the plane of the drawing around the four ladders.

[0034] As in Fig. 2 The outer insulation or layer of the sheathed cable 2, which is arranged radially outside the shielding foil 4, is shown partially removed.

[0035] The foil removal device 1 comprises a bending gripper 10 for gripping or holding the sheathed cable 2. The bending gripper 10 comprises four gripping jaws. The gripping jaws can be positioned perpendicular to a longitudinal direction of the sheathed cable 2, which is defined by the Fig. 4 The gripping jaws, which run from left to right, can be moved towards each other to grip the sheathed cable 2. The gripping jaws can be moved away from each other perpendicular to the longitudinal direction of the sheathed cable 2 to release the sheathed cable 2.

[0036] The bending gripper 10 grips or holds the part of the shielding foil 4 that is to be removed from the sheathed cable 2.

[0037] The gripping jaws can together form a gripping surface 11, which is oriented in a direction that is in Fig. 4 The path runs from left to right, corresponding to a frustoconical recess. The angle of the frustoconical recess can be less than or equal to approximately 4°, e.g., approximately 2° or approximately 3°. The gripping surface 11 of the bending gripper 10 can have a rough surface. The gripping jaws can be identical or of the same type.

[0038] The bending gripper 10 is attached by means of a gimbal suspension 8. The axis 9 of the gimbal suspension 8 runs in Fig. 4 from top to bottom. The further axis 9' of the gimbal suspension 8, perpendicular to axis 9, runs in Fig. 4 out of the plane of the drawing. The intersection of the two axes 9, 9' of the gimbal suspension 8 is the point where the predetermined breaking point 5 of the shielding foil 4 is located. In other words, the sheathed cable 2 is arranged in the foil removal device 1 such that the pivot point of the gimbal suspension 8 of the bending gripper 10 is located in a plane in which the predetermined breaking point 5 lies or which is spanned by the predetermined breaking point 5.

[0039] The bending gripper 10 or the gripping jaws can have a (minimal) distance of less than approx. 1 mm from the predetermined breaking point 5 (along the longitudinal direction of the sheathed cable 2).

[0040] The bending gripper 10 is connected to an eccentric device 13 via a further cardan suspension 8 and / or via a ball joint. An eccentric actuator 14 can move an element of the eccentric device 13 such that the bending gripper 10, e.g. while holding or gripping the sheathed cable 2, rotates (or tilts) about the axis 9' and consequently bends the sheathed cable 2.

[0041] The foil removal device 1 can optionally include an additional gripper 12 that grips or holds a portion of the sheathed cable 2. The additional gripper 12 is positioned at a distance from the bending gripper 10 such that the predetermined breaking point 5 can be located between the first portion of the sheathed cable 2 gripped by the bending gripper 10 and the second portion of the sheathed cable 2 gripped by the additional gripper 12. The additional gripper 12 allows a small portion or short section of the sheathed cable 2 to be bent by the bending gripper 10. The first portion of the sheathed cable 2 can be the cable tip 3 or a part thereof. The first portion of the sheathed cable 2 can also include a portion of the cable that is directly adjacent to the cable tip 3 and faces away from the bending gripper 10.

[0042] Fig. 5a shows a side view of the sheathed cable 2 from Fig. 2 before bending. Fig. 5b shows a side view of the sheathed cable 2 from Fig. 5a during bending before tearing the shielding foil 4 at a predetermined breaking point 5. Fig. 5c shows a side view of the sheathed cable 2 from Fig. 5a or Fig. 5b during bending after tearing the screen foil 4 over part of the circumference of the screen foil 4.

[0043] The predetermined breaking point 5 is an area that extends essentially along a circumferential direction (in Fig. 5a (into or out of the plane of the drawing). At the predetermined breaking point 5, the shielding foil 4 is perforated or weakened in another controlled manner. The sheathed cable 2 or the shielding foil 4 is gripped in a first part of the shielding foil 4 by the bending gripper 10 and at least partially perpendicular to the longitudinal direction of the sheathed cable 2, which extends in Fig. 5a running from left to right, it moves and is thereby bent. A section of the sheathed cable 2 is consequently bent by bending a part of the section of the sheathed cable 2 perpendicular to the direction that runs in Fig. 5a from left to right, is moved. The situation during the bending of the sheathed cable 2 before the tearing of the shielding foil 4 at the predetermined breaking point 5 is in Fig. 5b to see.

[0044] It is also conceivable that the sheathed cable 2 is bent (manually) and then gripped or held in its bent shape by the bending gripper 10. In this case, the sheathed cable 2 is not gripped and bent in an upright position, but rather the bending gripper 10 is already, for example, on the elliptical path along which the first part of the sheathed cable 2 is then moved. The first part of the sheathed cable 2 is thus moved manually and then held by the bending gripper 10.

[0045] The sheathed cable 2 is bent further until a crack 16 has formed on part of the circumference of the shielding foil 4. This is in Fig. 5c shown. Now the sheathed cable 2 is no longer bent in the previous direction, i.e., the bending angle is not increased further.

[0046] Subsequently, a first section of the sheathed cable 2, which has been gripped by the bending gripper 10, and a section of the sheathed cable 2 that is further away from the predetermined breaking point 5 than from the bending gripper 10, are moved in an elliptical motion. In other words, the first section of the sheathed cable 2 that has been gripped or is held by the bending gripper 10, and the section of the sheathed cable 2 located between the bending gripper 10 and the auxiliary gripper 12 or the transport carriage, are moved in an elliptical motion. No part of the sheathed cable 2 or the shielding foil 4 is twisted relative to the rest of the sheathed cable 2.

[0047] The elliptical movement can be circular. The angle at which the sheathed cable 2 is bent can be changed during the elliptical movement. This is particularly effective for sheathed cables 2 with an elongated and / or asymmetrical cross-section, as it ensures that sufficient tensile stress is always present to tear the shielding foil 4 at the predetermined breaking point 5, while simultaneously preventing unintentional damage to the sheathed cable 2.

[0048] By rotating the first part of the sheathed cable 2 using the bending gripper 10, the breaking stress or tensile stress moves over the entire circumference of the shielding foil 4. The shielding foil 4 gradually tears over the entire circumference of the shielding foil 4 or the sheathed cable 2.

[0049] The gripper 10 is used to strip or remove the shielding foil 4 from the sheathed cable 2.

[0050] After the portion of the shielding foil 4 held by the bending gripper 10 has been torn off and the shielding foil 4 has been removed from the sheathed cable 2, the bending gripper 10 can release the portion of the shielding foil 4. Air pressure then detaches the shielding foil 4 from the bending gripper 10, specifically from the gripping surfaces 11 of the bending gripper 10, and it can subsequently be vacuumed up using a suction nozzle 19.

[0051] Fig. 6a-6e The drawings show the process, although the sheathed cable 2 is not shown or visible in the drawings. Fig. 6a The film removal device 1 shows Fig. 1 with the bending gripper 10 in a basic position without a sheathed cable 2. The first part of the sheathed cable 2 is held in the basic position of the bending gripper 10 along a longitudinal direction that runs in the direction of the longitudinal direction of the rest of the sheathed cable 2. Fig. 6b The film removal device 1 shows Fig. 6a , after rotating the bending gripper 10 from the basic position about the axis 9'. Fig. 6c The film removal device 1 shows Fig. 6a or Fig. 6b after the bending gripper has rotated or wobbled 10. Fig. 6d The film removal device 1 shows Fig. 6a or Fig. 6b or Fig. 6c after a further rotation or wobble of the bending gripper 10. Fig. 6e The film removal device 1 shows Fig. 6a or Fig. 6b or Fig. 6c or Fig. 6d after a further rotation or wobble of the bending gripper 10.

[0052] The rotation or wobbling of the bending gripper 10 is carried out by rotating or moving the eccentric device 13 by means of a motor 15.

[0053] The bending gripper 10 is initially in a basic position, as shown in Fig. 6a The direction of expansion of the sheathed cable 2 is the same at the location of the additional gripper 12 as on the side of the bending gripper 10 facing away from the predetermined breaking point 5.

[0054] First, the sheathed cable 2 with the shield foil 4, which has a predetermined breaking point 5, is positioned such that the predetermined breaking point 5 is located between the bending gripper 10 and the auxiliary gripper 12. If no auxiliary gripper 12 is present, a portion of the sheathed cable 2 is held by a transport carriage. The transport carriage can transport the sheathed cable 2 to the foil removal device 1 and, after the removal of a portion of the shield foil 4, away from the foil removal device 1.

[0055] The predetermined breaking point 5 of the shielding foil 4 is located at the intersection of the axes 9, 9' of the gimbal suspension 8. This means that the sheathed cable 2 is arranged such that the central axis of the sheathed cable 2 is at the level of the Fig. 4 the axis 9' of the gimbal suspension 8 runs from back to front through the plane of the drawing, and the predetermined breaking point 5 runs from left to right in Fig. 4 at the level of the in Fig. 4 is arranged on the axis 9 of the gimbal suspension 8, which runs from top to bottom.

[0056] The gripping jaws are moved towards each other to grip the sheathed cable 2 or a part of the sheathed cable 2 where the shielding foil 4 is exposed.

[0057] Now the ball joint that connects the bending gripper 10 to the eccentric device 13 is moved, namely in Fig. 6b downwards. This causes the bending gripper 10 to rotate. This bends a portion of the sheathed cable 2 downwards. The deflection or angular position of the bending gripper 10 is so large that the shielding foil 4 tears at the predetermined breaking point 5 due to the tensile stress generated on a portion of the circumference of the shielding foil 4 or the sheathed cable 2, namely on the upper side of the shielding foil 4, since a portion of the sheathed cable 2 is bent downwards.

[0058] The bending gripper 10 is rotated about the pivot point of the gimbal suspension 8. The angle can be, for example, in a range of approximately 10° to approximately 30°, particularly approximately 15° to approximately 25°. For example, the angle can be approximately 17° to approximately 20°, particularly approximately 18°.

[0059] The eccentric device 13, and thus also the bending gripper 10, is then rotated by means of a motor 15 around the pivot point of the gimbal suspension 8. The position of the sheathed cable 2 at the predetermined breaking point 5 remains essentially unchanged. The portion of the sheathed cable 2 immediately adjacent to the predetermined breaking point 5 and facing away from the auxiliary gripper 12 is moved along an elliptical path.

[0060] In Fig. 6b-Fig. 6e The bending gripper 10 is rotated in a direction which, viewed in a direction running from the auxiliary gripper 12 to the bending gripper 10, is counterclockwise.

[0061] By rotating the bending gripper 10 and thereby bending a section of the sheathed cable 2 in different directions, the tensile stress moves over the entire circumference of the shielding foil 4, so that the tear 16 moves along the predetermined breaking point 5 over the circumference of the shielding foil 4, until finally the part of the shielding foil 4 held by the bending gripper 10 is completely torn off the sheathed cable 2 (which is held by the additional gripper 12).

[0062] The sheathed cable 2 is released from the auxiliary gripper 12 and moved away by means of the carriage. The sheathed cable 2 is thus removed from the foil removal device 1, so that the auxiliary gripper holds back the separated part of the shielding foil 4 and locally separates it from the sheathed cable 2.

[0063] Now the bending gripper 10 opens to release the detached part of the shielding foil 4.

[0064] Compressed air can now be blown through compressed air channels 18, 18' of the gripping jaws or blow-out opening of the bending gripper 10, whereby the part of the shielding foil 4 separated from the sheathed cable 2 is detached from the gripping jaws or moved away.

[0065] The separated part of the screen foil 4 is then extracted through a suction nozzle 19 and a suction hose 20.

[0066] The foil removal device 1 is now ready to remove part of the shielding foil 4 of another sheathed cable 2.

[0067] The bending gripper 10 can be rotated around the pivot point of the gimbal suspension 8 to complete a rotation of approximately 360°. To ensure tearing across the entire circumference of the shielding foil 4, it is also conceivable that the bending gripper 10 could be rotated by approximately 720°.

[0068] The direction of rotation of the bending gripper 10 can depend on a winding direction 17 of the shielding foil 4. The shielding foil 4 typically has an overlap area 7. In the overlap area 7, the shielding foil 4 has two layers: an outer layer with respect to the radial direction of the sheathed cable 2 and an inner layer with respect to the radial direction of the sheathed cable 2.

[0069] In Fig. 3a The screen foil 4 has a winding direction 17 counterclockwise. Fig. 3b The screen foil 4 has a winding direction 17 in a clockwise direction.

[0070] The direction of rotation of the bending gripper 10 is preferably opposite to the winding direction 17 of the shielding foil 4, so that the tear 16 at the predetermined breaking point 5 is directed into the radially lower part of the shielding foil 4. If the direction of rotation of the bending gripper 10 is in the direction of the winding direction 17 of the shielding foil 4, a second tear 16 can occur under unfavorable circumstances, and consequently the risk of fringe formation, especially at the meeting point of both tears, is greatly increased. This applies particularly if the lower part of the shielding foil 4 has less or poorer perforation 6 than the upper part of the shielding foil 4 in the overlap area 7.

[0071] In the overlap area 7, the radially outer part of the shielding film 4 can be provided with a slot perforation, and the radially inner part of the shielding film 4 can be provided with a hole perforation. The slot perforation can comprise a long slot extending along the entire length of the overlap area 7 along the circumferential direction of the shielding film 4.

[0072] The additional gripper 12 can be designed as a prism gripper. This gives the additional gripper 12 an enlarged gripping area in which the cable can be grasped by the additional gripper 12. Furthermore, this results in higher positioning accuracy.

[0073] It is also conceivable that a bending gripper 10 is arranged on an eccentric device 13, i.e. the cable is bent manually, secured in the bending gripper 10 and then the bending gripper 10 is moved on an elliptical motion, in particular a circular motion.

[0074] If the sheathed cable 2 is sensitive, particularly sensitive to bending, the predetermined breaking point 5 can be subjected to a tensile stress before a section of the sheathed cable 2 is bent. This reduces the bending angle.

[0075] Finally, it should be noted that terms such as "comprising," "encompassing," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps from other embodiments described above. Reference numerals in the claims are not to be considered as limitations.

Claims

1. A method for removing a portion of a shielding foil (4) of a sheathed cable (2), the method comprising the following steps: providing the sheathed cable (2) with the shielding foil (4), the shielding foil (4) having a predetermined breaking point (5) extending substantially along a circumference of the shielding foil (4); bending a portion of the sheathed cable (2) with the shielding foil (4) in a first direction to generate a tearing stress at the predetermined breaking point (5) on a portion of the circumference of the shielding foil (4) such that the shielding foil (4) tears at the predetermined breaking point (5) on a portion of the circumference of the shielding foil (4); moving a first portion of the sheathed cable (2) in a substantially elliptical, in particular circular, movement to generate a tearing stress over substantially the entire circumference of the shielding foil (4) such that the shielding foil (4) tears at the predetermined breaking point (5) over the entire circumference of the shielding foil (4);and removing the part of the shielding foil (4) separated from the sheathed cable (2).

2. Method according to claim 1, wherein the movement of the first part of the sheathed cable (2) is carried out in an elliptical, in particular circular, movement in a direction of rotation which is opposite to a winding direction (17) of the shielding foil (4) along a circumference of the sheathed cable (2).

3. Method according to claim 1 or 2, wherein, prior to the step of moving the first part of the sheathed cable (2) in an elliptical movement, the shielding foil (4) is prestressed in the longitudinal direction of the sheathed cable (2).

4. Method according to one of the preceding claims, wherein a length of a bending area in which the sheathed cable (2) is bent by the elliptical movement of the first part of the sheathed cable (2) and / or a bending angle in which the sheathed cable (2) is bent by the elliptical movement of the first part of the sheathed cable (2) is adapted to the properties of the sheathed cable (2).

5. Method according to one of the preceding claims, further comprising the following step: Detaching the shielding foil (4) separated from the sheathed cable (2) at the predetermined breaking point (5) from a bending gripper (10) which holds the part of the shielding foil (4) separated from the sheathed cable (2), by means of compressed air and / or suction of the detached shielding foil (4).

6. Method according to one of the preceding claims, wherein a second part of the sheathed cable (2) is gripped such that the predetermined breaking point (5) is located between the first part of the sheathed cable (2) and the second part of the sheathed cable (2).

7. Method according to one of the preceding claims, wherein the first part of the sheathed cable (2) is moved in an elliptical motion by means of a gimbal suspension (8).

8. Method according to claim 7, wherein the first part of the sheathed cable (2) is moved in an elliptical motion by means of the gimbal suspension (8) such that the pivot point of the gimbal suspension (8) is located on a plane in which the predetermined breaking point (5) of the shielding foil (4) runs.

9. Method according to one of the preceding claims, further comprising the following step: creating the predetermined breaking point (5) of the shielding foil (4) by perforating the shielding foil (4) by punching holes and / or slitting along the circumference of the shielding foil (4).

10. Method according to claim 9, wherein in an overlap area (7) of the shielding foil (4), in which the shielding foil (4) is arranged overlapping along a circumference of the sheathed cable (2), an outer part of the shielding foil (4) in the radial direction of the sheathed cable (2) is slot-perforated at the predetermined breaking point (5) and an inner part of the shielding foil (4) in the radial direction of the sheathed cable (2) is hole-perforated at the predetermined breaking point (5).

11. Foil removal device (1) for removing a part of a shield foil (4) of a sheathed cable (2) at a predetermined breaking point (5) from the sheathed cable (2), wherein the removal device comprises: - a bending gripper (10) for gripping a first part of the sheathed cable (2) and for holding the gripped first part of the sheathed cable (2) such that the sheathed cable (2) is at least partially in a bent state, so that a tear stress is generated at the predetermined breaking point (5) on a part of the circumference of the shield foil (4) such that the shield foil (4) tears at the predetermined breaking point (5) on a part of the circumference of the shield foil (4);and - a rotary device for moving the bending gripper (10) such that the first part of the sheathed cable (2) is moved along an elliptical, in particular circular, path to generate a breaking stress over substantially the entire circumference of the shielding foil (4), so that the shielding foil (4) tears at the predetermined breaking point (5) over the entire circumference of the shielding foil (4).

12. Foil removal device (1) according to claim 11, further comprising an additional gripper (12) for gripping a second part of the sheathed cable (2) such that the predetermined breaking point (5) is located between the additional gripper (12) and the bending gripper (10).

13. Foil removal device (1) according to claim 11 or 12, further comprising: one or more blow-out openings in the bending gripper (10) for blowing out a fluid to release the shielding foil (4) from the bending gripper (10) and / or a suction device for suctioning the shielding foil (4) separated from the sheathed cable (2).

14. Film removal device (1) according to one of claims 11-13, wherein the bending gripper (10) has a frustoconical recess widening away from the predetermined breaking point (5), in particular a frustoconical recess with an opening angle of the recess of less than or equal to approximately 4°.

15. Foil removal device (1) according to one of claims 11-14, wherein the rotary device is designed such that a direction of rotation of the first part of the sheathed cable (2) when moving the first part of the sheathed cable (2) along an elliptical, in particular circular, path, can be tuned to a winding direction (17) of the shielding foil (4) along a circumference of the sheathed cable (2).