EP4164073A1 - Cutter - Google Patents

Abstract

The present invention relates to a cutter (10) having a first and a second side (11, 12), a contact carrier strip guide (18) which extends along the first side (11), a wire guide (13) in which a wire ( 20), which has at least a first partial area (21) and a second partial area (22), can be arranged, a stop (14) which is aligned transversely to the line guide (13) and which has at least one opening (16), wherein the first portion (21) of the conduit (20) can extend through the opening (16) and the second portion (22) of the conduit (20) can abut the stop (14), and the stop (14) includes a portion of the first page (11) forms. The invention further relates to a crimping tool (100) for crimping a contact (30), which is provided on a contact carrier strip (34), onto a line (20), at least having a cutter (10).

Description

technical field

The invention relates to a cutter for separating a contact from a contact carrier strip, and to a crimping tool that has a cutter.

State of the art

In cable assembly, contacts are crimped onto lines to produce ready-to-connect lines. In particular when crimping by hand, the front edge of a stripped core of a cable is brought into abutment with a stripper or wire stop on the crimping tool in the prior art in order to position the cable for crimping.

The pamphlet DE 10 2008 058 168 A1 describes a device for crimping or stripping at least one wire of a multi-wire cable. The device for crimping the wires can have what is known as a cutter for separating individual crimp contacts from a carrier strip. The cutter has an opening into which the wires of the cable can be inserted in a y-direction. Furthermore, the cutter comprises a first wedge-shaped guide element and a second wedge-shaped guide element, the two guide elements being arranged or oriented orthogonally to one another. During operation of the device, a cable that is stripped towards the end and whose cores are already stripped at the ends is inserted into the opening of the cutter counter to the y-direction. The stripped ends of the wires are guided through the guide elements into four quadrants, so to speak. In particular ask the guide elements also represent an axial stop for the cable.

With progressive development in cable assembly, component dimensions and the manufacturing tolerances required are becoming ever smaller. As a result, the prior art axial positioning as described above is too inaccurate in processing. In particular, the axial positional deviation of the finished crimped contact on the core or cable is too large.

Description of the invention

It is therefore an object of the present invention to provide a device with which significantly greater precision is achieved during crimping.

The above object is achieved by a cutter according to claim 1 and a crimping tool according to claim 10. Further advantageous embodiments of the invention can be found in the dependent claims, the description and the drawings.

In particular, the above-mentioned object is achieved by a cutter for separating a contact from a contact carrier strip, having a first and a second side, a contact carrier strip guide which extends along the first side and in which a contact carrier strip can be guided, the first side having a parting plane can form between the contact and the contact carrier strip, a line guide in which a line that has at least a first partial area and a second partial area can be arranged, with the line guide extending between the first and second side, a stop that is transverse to the line guide oriented, and having at least one aperture, wherein the first portion of the conduit can extend through the aperture and the second portion of the conduit can abut the abutment, and the abutment forms a portion of the first side such that a plane exists between the first and second portion of the line can be in the parting plane between the contact and the contact carrier strip.

The cutter is adapted to sever the contact from a contact carrier strip on which the contact is provided so that only the severed contact is crimped to a wire. The constant miniaturization of the components requires an exact positioning of the line, in particular a first partial area of a line, in the crimping area with a contact. To achieve exact positioning, a stop for the second part of the cable is integrated in the cutter. The stop is arranged on the cutter such that the second portion of the line can rest against the stop and a plane between the first and second portion of the line can be in the parting plane between the contact and the contact carrier strip. This arrangement has the advantage that the cable is fixed directly at the parting plane between the contact and the contact carrier strip, and the highest possible precision is achieved.

Furthermore, the cutter has a compact, space-saving design. In particular, the stop offers the largest possible contact surface for the second partial area of the line. A large contact surface enables and supports secure positioning. The opening, through which the first portion of the line can be passed, further aligns the first portion of the line exactly. This ensures reliable alignment of the first section of the cable in the crimping area that is true to the position. Overall, this increases the precision during crimping.

Finally, by placing the second partial area against the stop, it is ensured that the first partial area protrudes as far as possible through the opening. In particular, the first sub-area protrudes through the opening into the crimping area, so that the first sub-area lies essentially completely, i.e. with the greatest possible proportion, in the crimping area. Arranging large portions of the first portion of the wire in the crimping area enables reliable crimping.

During operation, the second part of the line can be better seen by the staff and can therefore be positioned better. In particular, the staff receives visual and haptic feedback for correct positioning of the second section of the line on the stop.

The first sub-area preferably comprises a stripped wire and/or the second sub-area an insulating layer, in particular an exposed dielectric. When crimped to a contact, the stripped wire provides a mechanical and electrical connection between the wire and the contact. The dielectric preferably comprises a plastic material which remains dimensionally stable to moderate mechanical forces, such as when it is placed against a stop, or which can react with elastic deformation. The dielectric is preferably insensitive to shock. The dielectric is suitable as a stable application point for the line.

A distance between the opening and the contact carrier strip guide can preferably correspond to the height of crimp tabs of a contact. The distance is preferably determined between the closest adjacent points of the opening and the contact carrier strip guide. The distance can also be less than the height of the crimping lugs of a contact. Due to the small distance between the opening and the contact carrier strip guide, the first partial area of a line can be arranged at least in sections in the third direction between the crimping lugs. This arrangement increases precision when aligning the wire to the contact and then crimping.

The opening is preferably designed as a notch in the stop. The notch allows the first portion of the wire or wire to be inserted into the opening in a direction transverse to the longitudinal direction of the wire. This simplifies the insertion and positioning of the wire into the cutter.

The notch preferably has an insertion area and a base area, with the insertion area tapering in the direction of the base area. The insertion area serves to insert the first partial area of the cable or wire into the notch and is preferably designed to be wider than the base area. The tapered shape of the insertion area makes it easier to insert the first portion of the line or wire into the notch. The bottom area is used to fix the first sub-area of the line or the wire in the notch.

The line guide preferably has at least one taper along its longitudinal direction. The taper divides the cable routing into different parts visually and haptically. The shape of the cable guide makes it easier to align the cable correctly in the cable guide.

Preferably, the cutter further includes a line centerer for centering the line along its longitudinal direction. The line centerer makes it easier for personnel to align the line quickly and reliably along its longitudinal direction. The cable centerer offers an advantage in operation, especially for inexperienced personnel.

The line centering device preferably has a line guide in which the line can be arranged, with a length of the line guide in the longitudinal direction of the line being greater than a width of the line guide. The width runs transversely, in particular perpendicularly, to the longitudinal direction along a second direction. Since the length of the cable routing is significantly greater than its width, reliable alignment can also be ensured for cables with low rigidity.

The line guide preferably has rounded edges at least in an insertion area for the line. The insertion area is used to insert a cable into the cable centerer. The rounded edges make it easier to insert the cable. In addition, damage to the cable, which can be caused by sharp edges, is avoided.

The object mentioned above is also achieved in particular by a crimping tool for crimping a contact, which is provided on a contact carrier strip, onto a line, at least having a cutter. The external dimensions of the cutter can be adapted to cutters from the prior art. In this way, an existing crimping tool can easily be equipped with the presented cutter. The cutter, which has a stop on the parting plane between the contact and the contact carrier strip, can increase crimping precision.

Fig. 1

eine perspektivische Ansicht eines Ausführungsbeispiels eines Abschneiders;

Fig. 2

eine weitere perspektivische Ansicht des Ausführungsbeispiels des Abschneiders mit eingelegter Leitung;

Fig. 3

eine seitliche Querschnittsansicht des Ausführungsbeispiels des Abschneiders;

Fig. 4

eine perspektivische Darstellung eines Ausschnitts eines Ausführungsbeispiels eines Crimpwerkzeugs; und

Fig. 5

eine weitere perspektivische Darstellung eines Ausschnitts eines Ausführungsbeispiels eines Crimpwerkzeugs.

The following description of exemplary embodiments is made with reference to the accompanying figures. show:

1

a perspective view of an embodiment of a cutter;

2

another perspective view of the embodiment of the cutter with inserted line;

3

Figure 12 is a cross-sectional side view of the embodiment of the cutter;

4

a perspective view of a detail of an embodiment of a crimping tool; and

figure 5

a further perspective view of a detail of an embodiment of a crimping tool.

A description of exemplary embodiments follows with reference to the figures mentioned above.

1 1 shows an embodiment of a cutter 10. In the illustrated embodiment, the cutter 10 is a cuboid component and has a first and a second side 11,12. The second side 12 is preferably arranged opposite the first side 11 (cf. Fig.1 and 2 ).

The first side 11 has a contact carrier strip guide 18 (see Fig. 2 ). The contact carrier strip guide 18 is preferably formed as an indentation, in the first direction X, along the first side 11 . in the in 2 illustrated embodiment, the contact carrier strip guide 18 extends along a short side in a second direction Y. The depth of the contact carrier strip guide 18 is formed such that a contact carrier strip 34 can be guided in the contact carrier strip guide 18 with its entire width. The first page can be a Parting plane T between the contact carrier strip 34 and a contact 30 which is attached to the contact carrier strip 34 form.

The first side 11 also has a stop 14 . The stop 14 is a portion of the first side 11. The stop 14 has a specific thickness. A distance between the dielectric 22 and the inner contact 30 can be set via the thickness of the stop 14 . In particular, there is ideally a visible distance between the partial area 22 and the crimping area 32 . The material strength or thickness of the stop 14 can be matched to a defined distance, preferably in the crimped state, between the partial area 22 and the crimping area 32 . The stop 14 has at least one opening 16 . The width of the opening 16 is chosen such that only the first partial area 21 of a line 20 can extend through the opening 16 . The first portion 21 of the line 20 can extend through the opening 16 until the second portion 22 of the line 20 rests against the stop 14 . Preferably, the opening 16 is formed as an indentation. In particular, the opening 16 has an insertion area 16a and a bottom area 16b. In a preferred embodiment, the lead-in area 16a tapers in the direction of the base area 16b due to beveled edges (see Fig. 2 ). The tapered shape facilitates the insertion of a line 20, in particular the first portion 21. The bottom portion 16b is preferably formed in such a way that it is flush with the first portion 21 of a line 20 laterally or on the circumference of the line 20. A precise fixing of the line 20 can be achieved by the flush finish.

The duct 13 is an opening that extends between the first side 11 and the second side 12 . In particular, the line guide 13 is formed as a recess or notch. The cable guide 13 preferably extends transversely to the contact carrier strip guide 18 between the first and second side 11, 12. This shape makes it possible to insert a cable 20 into the cable guide 13 along the first direction X, its longitudinal direction, or also from a third direction Z to be inserted into the line guide 13. Alternatively, combinations of both movements are possible. The line guide 13 preferably has at least one taper 17 along its longitudinal direction X. in the in figs 1 to 3 illustrated embodiment, the taper 17 through formed a projection. In alternative exemplary embodiments, the taper 17 can be formed by a plurality of projections, steps or a continuous transition, or it can be absent altogether. The taper 17 can be helpful when inserting the line 20, for example by arranging a third section 23 of the line 20, which for example includes the line 20 with an inverted braided shield, in the widest part of the line guide 13, while the second section 22 of the Line 20 is arranged in a narrower part, and both parts are easily distinguishable visually and haptically.

The line 20 is preferably a single-core line. In this case, it is not possible to use the splitting area of several wires as the attachment point for the line 20. The core 21 of the line 20 is surrounded by an insulating layer 22 . in the in figs 2 and 3 illustrated embodiment, the insulating layer 22 is an exposed dielectric. The braided shield 23 of the line 20 can, as in 3 shown, be everted over the line 20 (s. Third portion 23 of the line 20). In an alternative exemplary embodiment, the braided shield 23 or one or more layers overlying the insulation layer 22 can also extend over the second partial area 22 of the line, ie the layers can extend in the final position of the line 20 in the line guide 13 up to the stop 14 .

When inserting a cable 20 into the cable guide 13 of the cutter 10, the cable 20 is preferably inserted into the cable guide 13 coming from the XZ direction and finally pushed in the first direction X towards the stop until the second partial area 22 of the cable 20 reaches the stop 14 is present. In the final position, the first side 11 preferably forms a plane, in particular a boundary plane, between the first and second sections 21, 22 of the line 20. In practice, due to a finite width of the stop 14, the plane between the first and second sections 21 , 22 of the line 20 and the parting plane T between the crimping lugs 32 and the contact carrier strip 34 may be arranged adjacent to or adjacent to one another.

4 shows an embodiment of a crimping tool 100 for crimping a contact 30 that is provided on a contact carrier strip 34, or in particular the crimping lugs 32 on a line 20. In operation, the contact carrier strip 34 is pushed by a feed 102 on the crimping tool 100 along a second direction Y moved forward. The feed 102 engages in particular in pilot holes 36 on the contact carrier strip 34 and pushes the contact carrier strip 34 forward (see Fig. figure 5 ). The contacts 30, which are arranged at a distance from one another on the contact carrier strip 34, are successively fed to a crimping area of the crimping tool 100.

Before the actual crimping, the contact 30 to be crimped must be separated from the contact carrier strip 34 . For this purpose, the contact 30 with the contact carrier strip 34 in the contact carrier strip guide 18 is moved forward in the second direction Y until the contact 30 is aligned with the opening 16 in the third direction Z. In this position, the two crimping lugs 32 of the contact 30 are arranged to the side of the opening 16 . When the line 20 is then inserted into the line guide 13 of the cutter 10, the first portion 21 of the line 20 is in the second direction Y, and at least partially also in the third direction Z, between the crimping lugs 32. The short distance D between the Opening 16 and the contact 30 increases the precision when arranging line 20 to contact 30 and thus also the precision during the subsequent crimping. The use of a wire stop 108 as in the prior art is obsolete.

In order to facilitate the alignment of the line 20 in the line guide 13 of the cutter 10, a line centering device 40 is arranged on the cutter 10 in the exemplary embodiment shown. The line centerer 40 has in particular a line guide 43 which is aligned along the first direction X with the line guide 13 of the cutter 10 . The wire centerer 40 is optional and can be mounted on the crimping tool 100 or a cutter holder if required. In particular, the line centering device 40 has a hard and smooth surface, so that a line 20 can be quickly pushed into the line guide 43 and removed again. The length of the line guide 43 in the first direction X can be adapted to the rigidity of the line 20 used to be adjusted. The stiffer a line 20 is, the shorter the line guide 43 can be formed.

The first portion 21 of the line 20, i.e. the stripped wire 21 in the illustrated embodiment, lies along the first direction X completely in the crimping area, i.e. between the crimping lugs 32. Over the length of the first portion 21 of the line 20, i.e. how wide the wire 21 is stripped from the end of the line, it is possible to set how far the line 20 protrudes into the crimping area or is crimped.

To separate contact 30 from contact carrier strip 34, an actuator 106 exerts a force on bearing surfaces 19 on cutter 10 and moves cutter 10 in the third direction Z so that a cutting edge (not shown) separates contact 30 from contact carrier strip 34 is reached. The contact 30 is then crimped via its crimping lugs 32 to the line 20 or the wire 21 of the line 20 using a crimper 104. After the crimping has been completed, the actuator 106 and the crimper 104 move back relative to their starting position and the crimped line 20 can be removed.

REFERENCE LIST

10

cutter

11

first page

12

second page

13

wiring

14

attack

16

opening

16a

insertion area

16b

floor area

17

rejuvenation

18

Contact carrier strip guide

19

bearing surfaces

20

Management

21

first part (core)

22

second sub-area (dielectric)

23

third section (shielding)

30

Contact

32

crimp tab

34

contact carrier strips

36

pilot hole

40

line centerer

43

wiring

100

crimp tool

102

feed

104

crimpers

106

actuator

108

wire stop

D

Distance

X

first direction (longitudinal direction)

Y

second direction (transverse direction)

Z

third direction

Claims (10)

Cutter (10) for separating a contact (30) from a contact carrier strip (34), comprising: a) a first and a second side (11, 12); b) a contact carrier strip guide (18) which extends along the first side (11) and in which a contact carrier strip (34) can be guided, the first side (11) having a parting plane (T) between the contact (30) and the Contact carrier strips (34) can form; c) a line guide (13) in which a line (20) having at least a first partial area (21) and a second partial area (22) can be arranged, the line guide (13) being located between the first and second side ( 11, 12); d) a stop (14) which is aligned transversely to the line guide (13) and which has at least one opening (16), the first partial area (21) of the line (20) being able to extend through the opening (16) and the second portion (22) of the line (20) can rest against the stop (14); and e) the stop (14) forms a portion of the first side (11), so that a plane between the first and second portion (21, 22) of the line (20) in the parting plane (T) between the contact (30) and the contact carrier strip (34) can lie. Cutter according to Claim 1, in which the first partial area (21) comprises a stripped wire and/or the second partial area (22) comprises an insulating layer, in particular an exposed dielectric. A cutter according to claim 1 or 2, wherein a distance (D) between the opening (16) and the contact carrier strip guide (34) can correspond to the height of crimping lugs (32) of a contact (30). Cutter according to one of Claims 1-3, in which the opening (16) is designed as a notch in the stop (14). A cutter according to claim 4, wherein the notch has a lead-in portion (16a) and a bottom portion (16b), the lead-in portion (16a) tapering towards the bottom portion (16b). Cutter according to one of Claims 1 - 5, in which the line guide (13) has at least one taper (17) along its longitudinal direction (X). A cutter according to any one of claims 1-6, further comprising a wire centerer (40) for centering the wire (20) along its longitudinal direction (X). Cutter according to Claim 7, in which the line centering device (40) has a line guide (43) in which the line (20) can be arranged, a length of the line guide (43) being greater in the longitudinal direction (X) of the line (20). as a width of the wiring (43). Cutter according to Claim 8, in which the line guide (40) has rounded edges at least in an insertion area for the line (20). Crimping tool (100) for crimping a contact (30), which is provided on a contact carrier strip (34), onto a line (20), at least having a cutter (10) according to any one of claims 1 - 9.

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