EP0542144A2 - Device for connecting a wire to a plug, contact element or the like - Google Patents

Abstract

In the case of a device for connecting a wire to a contact element or the like by deforming clamping devices by means of pressure elements of a crimping tool which is arranged in a replaceable manner in a press, an adjusting disc (14) on the clamping device side is allocated, such that it can rotate coaxially, for refining the height adjustment capability of a further adjusting disc (13) (which can rotate about the axis (A) of a locking bolt (16) or such like holding device pointing in the pressing direction (x) and is provided on the pressing device side), both adjusting discs in each case being provided with at least one annular surface (108) which rises like a spiral in the pressing direction (x). Each of the annular surfaces (108) has a radial step edge (110) as a boundary between the start and the end of the rise. In addition, the heights of the step edges are intended to be identical. <IMAGE>

Description

The invention relates to a device for connecting a wire to a contact element or the like. by deforming the clamping elements of the contact element or the like by means of pressure elements, in particular pressure elements of a crimping tool which can be exchangeably arranged in a press.

Devices of this type for cable assembly - for example for the fixed connection of wire ends with plugs and cable lugs - usually consist of a stop press with a vertically moved press stamp, which acts on a print head of the crimping tool arranged underneath, the crimping dies provided being guided downwards in this and a horizontally inserted plug member or the like. Fix the contact element by deforming the terminal lugs at one end of the cable or wire. The latter is stripped to a certain length, so that a smaller diameter than the isolated section is produced. The so-called crimp height of the acting stamp edge (s) required for the crimping process described is set by hand in dependence on the wire cross-sections or the shape of the contact element.

To set the crimp heights, for example, rotary heads with surfaces of different heights have been used, as disclosed in DE-AS 15 15 395. In such devices, the number of different height levels is predetermined, with the result that when the tool is transferred to another press with a different dimension and with different dead centers, the adjustment range may no longer be sufficient. This also applies to contacts that one have a very large area with regard to the cable to be attached to them. If a cable cross-section of 0.5 mm² is used, a crimp depth of 1.2 mm is required, with a cross-section of 4 mm² approximately 2.8 mm.

• * man benötigt Werkzeug zum Lösen von Gewindestiften;
• * es ist kein kontrolliertes Einstellen möglich;
• * der Druckpunkt der Presse liegt außerhalb des Mittelpunktes des Werkzeuges oder ist einseitig orientiert.

So-called wedge adjustments are also known which, although they allow stepless adjustment of the insulation or wire crimper, have the following disadvantages:

• * you need tools to loosen set screws;
• * controlled setting is not possible;
• * The pressure point of the press lies outside the center of the tool or is oriented on one side.

Knowing this state of the art, the inventor has set itself the goal of eliminating the identified disadvantages in a device of the type mentioned and refining the height setting. In addition, the improved device should be retrofittable to existing presses and should be automatically controllable with these.

The teaching of the independent claim leads to solving this problem. The dependent claims capture advantageous developments.

According to the invention, an adjusting disk on the clamping member side is coaxially rotatably associated with an adjusting disk provided on the pressure member side and rotatable about the axis of a locking bolt or the like holding member. The two adjusting disks are each co-rotatable least an annular surface rising spirally in the printing direction are provided. A radial step edge is created between the beginning and end of each of these ring surfaces as a boundary between the beginning and the end of the ascent.

It has proven to be advantageous to choose the dimension of the step edge height equally for all step edges.

According to a further feature of the invention, the adjusting disks lie coaxially on one another, the adjusting disk on the clamping member side enclosing a pressure plate which is associated with a surface of the other adjusting disk, i. H. this sits on.

In addition, according to the invention, the pressure plate is to be dimensioned so that it can be inserted into a central recess in the adjusting disk and, on its surface, is provided with two part-circular pressure surfaces that rise as support points for the overlying adjusting disk.

It is also advantageous to equip the pressure plate on the other surface as a support surface with a wedge-like latch protruding therefrom; the locking lug engages in a pressure block - usually located below it - and thus serves as a rotation lock.

The pitch of the clockwise increasing slope of the ring surface or the pressure surface should measure 2.18 mm with a preferred outer diameter of the adjusting disk of 56 mm or an outer diameter of the pressure plate of 42 mm.

According to a further feature of the invention, the desk-like surface of an adjusting wedge is assigned to the lower surface of the adjusting disk, the latter also being movably attached to a pressure block on the clamping element side.

• * definiertes Einstellen über eine Skala;
• * stufenloses Einstellen über einen großen Bereich;
• * Einstellen ohne Werkzeug;
• * verlustfreies Übertragen des Preßdruckes.

A stepless turret is offered with which the following advantages can be achieved:

• * defined setting on a scale;
• * stepless adjustment over a wide range;
• * Adjustment without tools;
• * lossless transfer of the pressure.

According to the invention, a locking bolt serves as a bearing for an upper adjusting disk, which is advantageously pressed onto a pressure plate via plate springs. The latter lies on a pressure block and is also fixed by the locking bolt - screwed to the pressure block - and secured against twisting by a fit on the underside.

Fig. 1:

eine Schrägsicht auf eine Vorrichtung mit einem Crimpwerkzeug in einer Anschlagpresse zum Verbinden von Kontaktelementen mit Drähten;

Fig. 2:

den Längsschnitt durch einen Draht mit zugeordnetem Kontaktelement;

Fig. 3:

eine Schrägsicht auf Fig. 2;

Fig. 4:

die Frontansicht eines Crimpwerkzeuges;

Fig. 5:

einen verkleinerten Teilschnitt durch das Crimpwerkzeug der Fig. 4, geschnitten etwa nach deren Linie V - V;

Fig. 6

ein Detail aus Fig. 5 mit Crimpstempeln, liegend (um 90° geschwenkt) dargestellt;

Fig. 7:

das Detail der Fig. 6 in Draufsicht;

Fig. 8:

Ansicht VIII zu Fig. 6 ohne Crimpstempel;

Fig. 9:

Ansicht IX zu Fig. 6 ohne Crimpstempel;

Fig. 10,11:

eine den Fig. 6, 7 entsprechende Wiedergabe des Details mit nur einem Crimpstempel;

Fig. 12:

eine vergrößerte Seitenansicht eines Teiles der Fig. 1 mit einer zugeordneter Verstellscheibe in Arbeitsstellung;

Fig. 13:

die Draufsicht auf Fig. 12;

Fig. 14:

eine Schrägsicht auf mehrere einander an einer Achse zugeordnete Teile einer erfindungsgemäßen Vorrichtung;

Fig. 15:

einen Schnitt durch einen Arretierbolzen mit perspektivisch zugeordneter Senkschraube;

Fig. 16:

die Sicht unter eine Verstellscheibe der Fig 14;

Fig. 17:

die Draufsicht auf die Verstellscheibe;

Fig. 18:

die Seitenansicht zu Fig. 17;

Fig. 19:

eine Schrägsicht auf eine Druckplatte der Fig. 14;

Fig. 20:

Draufsichten auf die Druckplatte in zwei verschiedenen Ausführungen;

Fig. 21:

die Seitenansicht zu Fig. 20;

Fig. 22:

die Sicht unter eine weitere Verstellscheibe der Fig. 14;

Fig. 23:

die Draufsicht auf die Verstellscheibe der Fig. 22;

Fig. 24:

die Seitenansicht zu Fig. 23;

Fig. 25:

eine Schrägsicht auf einen Verstellkeil der Fig. 14;

Fig. 26:

eine Seitenansicht zu Fig. 25;

Fig. 27:

einen Schnitt durch vergrößerte Teile der Fig. 14.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawing; this shows in

Fig. 1:

an oblique view of a device with a crimping tool in a stop press for connecting contact elements with wires;

Fig. 2:

the longitudinal section through a wire with an associated contact element;

Fig. 3:

an oblique view of Fig. 2;

Fig. 4:

the front view of a crimping tool;

Fig. 5:

a reduced partial section through the crimping tool of Figure 4, cut approximately along the line V - V;

Fig. 6

5 shows a detail from FIG. 5 with crimping dies lying (pivoted through 90 °);

Fig. 7:

the detail of Figure 6 in plan view.

Fig. 8:

View VIII of Figure 6 without crimp stamp;

Fig. 9:

View IX to Figure 6 without crimp stamp;

Fig. 10,11:

a representation of the details corresponding to FIGS. 6, 7 with only one crimp stamp;

Fig. 12:

an enlarged side view of part of Figure 1 with an associated adjusting disc in the working position.

Fig. 13:

the top view of Fig. 12;

Fig. 14:

an oblique view of several parts of an apparatus according to the invention assigned to one another on an axis;

Fig. 15:

a section through a locking bolt with a perspective countersunk screw;

Fig. 16:

the view under an adjusting disc of Figure 14;

Fig. 17:

the top view of the adjusting disc;

Fig. 18:

the side view of Fig. 17;

Fig. 19:

an oblique view of a pressure plate of Fig. 14;

Fig. 20:

Top views of the printing plate in two different versions;

Fig. 21:

the side view of Fig. 20;

Fig. 22:

the view under a further adjusting disc of FIG. 14;

Fig. 23:

the top view of the adjusting disc of Fig. 22;

Fig. 24:

the side view of Fig. 23;

Fig. 25:

an oblique view of an adjusting wedge of Fig. 14;

Fig. 26:

a side view of Fig. 25;

Fig. 27:

14 shows a section through enlarged parts of FIG. 14.

A stop press 80 for processing wires or cables up to 6 mm² line cross-section has a quick-change crimping tool 84 below a press housing 82 containing control and pressure devices and provided on frame legs 81 for connecting an insulated electrical wire 85 to one of a blank strand or sheet metal strip 87 separated connector, contact element 88 or the like.

In the exemplary embodiment of FIGS. 2, 3, flags - indicated by dashed lines at 89 and 89 _a - are pressed or crimped onto the previously stripped wire end 86 and the subsequently insulated wire 86 while deforming into sleeve-like clamping sections 90, 90 _{a, the} latter of which Take top edges to the element base 91 different distances t, (insulation area) and t₁ (wire end area) (Fig. 2). During crimping, the flags 89, 89 _a are rolled in so tightly that, for example, the strand of the wire end 86 _a flows and air pockets are prevented.

The so-called crimp heights t, t 1 must be adjustable in order to be able to adapt the effect of the deformation to the respective wire cross section.

The device for adjusting the crimp height consists of two units, namely a pneumatically and motor-controlled guide part 10, which is fixed on the stop press 80, and a part, which is assigned to this, to be adjusted. The latter is an adjusting disk 12 screwed onto the crimping tool 84 and rotatably mounted.

In the embodiment according to FIG. 4, the tool-side adjusting disk 12 consists of an upper disk 13 and a lower disk 14, which are penetrated by a hollow locking bolt 16. This is enclosed by an inserted plate spring 19.

4, 5 show a part of the crimping tool 84 with the adjusting disc 12 located above, the locking bolt 16 of which is seated in a pressure block 78 of the crimping tool 84. Below the adjusting disc 12, parallel crimping dies 74 and 76 are provided, the free lower edges 74 _e and 76 _{e of} which are assigned to the wire end 86 and the insulation part 85. The crimping dies 74, 76 are separated via the adjusting wheel parts 13, 14 from a press die indicated at 92 in FIG. 1 and by a spacer bush 75; the crimping die 76 for the insulation part 86 can be raised and lowered relative to the other crimping die 74 in accordance with arrow y in FIG. 5. 5 shows the left in front of the Insulation crimping stamp 76, a pressure rod 71 for a knife 72 provided underneath for separating the contact element 88 from the sheet metal strip 87 and, in addition to this knife 72, an anvil 93.

7 to 9, a cross-sectionally rectangular pressure surface for the washer 14 with an associated insulation crimping die 76 is indicated at 77, a cross-sectionally U-like pressure surface for the wire crimping die 74 at 73. In the channel profile 73 _{d of} the one pressure surface 73, a rod 77 _i the other printing surface 77 displaceable.

It is clear that both crimping dies 74, 76 can be acted upon with the upper disk 13 of the adjusting disk 12, but that the lower disk 12 adjusts the insulation crimper 76 and thus the height difference between t and t 1 in FIG. 2.

The adjusting disk 12 is associated with an adjusting wheel 24 of the guide part 10, which also consists of an upper and lower wheel 22, 23 and has an axis B parallel to its axis A, 25 radial teeth 26 projecting from the disk circumference thereof. These mesh in the working position shown in FIGS. 12, 13 with engaging grooves 18 of the adjusting disk 12.

The axially two-part adjusting wheel 24, with toothed disks 27 screwed to it, is rotatable in a front edge recess of a receiving plate 30 of the guide part 10, its shaft 32 is supported on both ends in two axle plates 34 - the edge recess above and below the receiving plate 30 - and is through Radial pins fixed. Each of the toothed pulleys 27 is or the like by a toothed belt 36. Drivetrain with drive parts 38, 38 _t - for example sprockets - connected by stepper motors 40 and 40 _t .

From the receiving plate 30 project parallel to its longitudinal axis M and on both sides of the latter holding plates 42, between which an approximately U-shaped yoke piece 43 is spanned in plan view and connected to them by cylinder screws. At the top web 44 of this yoke piece 43 there is a miniature cylinder 46, the piston rod 47 of which is connected to a transverse guide web 48. From the latter, guide profiles 50 protrude parallel to the piston rod 47, which pass through corresponding bearing bushes 52 of the yoke piece 43 and whose free ends are secured by stop blocks 54.

When the miniature cylinder 46 is pneumatically actuated, the piston rod 47 extends by increasing the distance q between the yoke piece 43 and the guide web 48 and thus guides the mounting plate 30 and the adjusting wheel 24 or upper wheel 22 and lower wheel 23 from the working position of FIGS. 12, 13 into one Rest position, stay in the adjusting disc 12 and adjusting wheel 24 at a distance from each other. When the movement is in the opposite direction, the adjusting wheel 24 comes into the working position, and the radial teeth 26 of the upper wheel 22 dip into the engaging grooves 18 of the upper disk 13 of the adjusting disk 12 in order to rotate it further by one grid. Then the adjusting wheel 24 releases from the adjusting disk 12 or its disk circumference 20 and returns to the rest position. Correspondingly, the lower wheel 23 rotates the lower disk 14, whereby the separate lower wheel drive 40 _t also allows a different adjustment direction and a different pitch of the rotation.

In the case of the device according to the invention according to FIGS. 14 to 27, which can also be operated manually, the locking pin 16 serves as a bearing for an upper adjusting disk or upper disk 13 with the interposition of at least one plate spring 19. This locking pin 16 has a length a of approximately 35.5 mm and one Outside diameter d 1 of about 14 mm has a shoulder shoulder 57 on its shaft 16 _s below its head 56 and an inner passage 58 of a diameter d of about 8 mm for a countersunk screw 60, the conical head surface 60 _{k of} which is in the closed position of a corresponding recess 59 of the locking bolt 16 hugs. In this closed position, the upper disk 13 is pressed onto a pressure plate 15, which in turn loads the lower adjusting disk or lower disk 14, the latter resting on an outer — annular — bearing surface 61 of the upper disk 13.

The upper disc 13 of an average height f of about 12 mm offers a collar 62 of diameter e 1 of 56 mm, the peripheral surface of which is designated 62 _s . The support surface 61 surrounds an annular rib 63, the outer circumference 63 _s equipped with a side groove 64 and the surface 65 is inclined to the plane of the support surface 61 at an angle, so that there is a radial step 66 of height i₁. This surface 65 of a width b of 7 mm follows a central opening 67 of the diameter e₂ of 14 mm and a likewise inclined surface 68 of the width c of likewise 7 mm with a radial step 69 of the height i₂. On the other - overhead in Fig. 14 - Surface 70 of the upper disk 13, an insert recess 70 _{a is provided} for the head 56 of the locking bolt 16.

On the circumference 62 _{s of} the collar 62, letters "A" to "K" are embossed with a division of 33 ° and - indicated at 95 - one hundred scaling lines with a division of 3.3 °.

The two inclined pressure surfaces 65 and 68 are, as shown in FIGS. 16, 17, offset from one another by 180 ° and have a clockwise pitch of 2.18 mm per revolution. A starting dimension 10.02 at the radial step 66, which is closer to the collar 62 - that is to say seen at the upper edge end in FIG. 16 - is offset by a final dimension of 12,200 which is provided at the lower free edge end; both printing surfaces 65, 68 are equipped with identical start and end dimensions.

The pressure plate 15 of the height h 1 of about 6 mm and the diameter e 3 of 42 mm has according to FIG. 19 on one of its surfaces - 96 - two protruding - limited by radial side flanks - area pieces 97.98 on a common diameter D, which offer pressure surfaces 97 _d , 98 _d as supports for the upper disk 13 - these are also offset from one another by 180 ° and rise clockwise by 2.18 mm per revolution. Here, the starting point S in Fig. 19 is clockwise at the back (dimension: 8000) and the final dimension Z (8.182) follows. The start and end dimensions of both printing surfaces 97 _d , 98 _d are the same.

On the counter surface 99 as a support surface there is a locking lug 100, which secures the pressure plate 15 against undesired rotation by engaging in a counter locking of the pressure block 78. Fig. 20 shows two versions of the pressure plate 15, namely - below - one with a smooth circumference 101 and above an embodiment whose circumference 102 has an axially parallel toothing with one hundred and eight tooth grooves 103 here; these determine a wall angle n of 90 ° with a tooth spacing of approximately 1.0 mm. It is not shown, for example in FIG. 17, that in this embodiment the outer circumference 63 _{s of} the annular rib 63 of the upper disk 13 is equipped with counter teeth.

The washer 14 of height h₄ of 10.5 mm has - on the outside in each case - an upper annular radial pressure surface 106 - the outer diameter e₄ of 56 mm, an inner diameter e₅ of 42 mm - and on the opposite side a base pressure surface 108 of an increase of 2.18 mm per revolution, increasing clockwise from and up to a radial edge 110. This has a starting dimension of 10,500 and a final dimension of 12,682. Numbers from "1" to "11" with a division of 33 ° are attached to the circumference 112 of the lower disk 14, and 100 scale lines with a division of 3.3 ° are shown in FIG. 24.

Between the upper pressure surface 106 and the lower base pressure surface 108 there is an annular wall 114, which has a width b₂ of approximately 7 mm in the region of an internal annular groove 116. The annular groove 116 receives a locking insert, not shown, which engages in a counter groove 118 of the upper disk 13 and thus holds the lower disk 14 in position.

Instead of the annular groove 116, radial through bores 120 - not shown - can also be provided - Offer spring-loaded ball catches or the like. Resilient locking pieces that are directed towards the axis A and project into the opposite groove 118 at the other end.

With 122 radial - 3 mm from the base pressure surface 108 - threaded bores for receiving resilient pressure pieces are designated; the latter engage in engagement with the teeth 102/103 of the pressure plate 15.

At the diameter D₁ of the lower plate 14, two axially parallel threaded holes 124 can be seen for receiving spring-loaded locking elements which can be used in recesses 126 in the bearing surface 61 of the upper plate 13.

Below the washer 14 there is an adjusting wedge 130 with an upper pressure surface 132 of width b₅ of 10 mm on a construction circle K. Between its center and the outer edge 133 of the pressure surface 132 facing away from it, a radius r of 30 mm extends in FIG. 25. The pressure surface 132 has a clockwise pitch of 2.18 mm per revolution. The radial wedge length n₅ measures 12 mm.

A guide pin 136 is inserted into a transverse bore 134 of the adjusting wedge 130 and engages in side grooves 138 of two guide jaws 140, between which the adjusting wedge 130 is supported. These are formed laterally on a pressure block 78, in which the countersunk screw 60 engages in the central bore 144. A radial edge groove 146 of the pressure block 78 extends from the central bore 144 as a counter detent for the detent 100 of the thrust washer 15.

If the upper adjusting disc 13 is rotated around the locking bolt 16, it screws on the two support points 97 _d , 98 _{d of} the pressure plate 15 downwards or - depending on the direction of rotation - upwards. Only an 11/12 turn is possible, the adjusting disc 13 being adjusted in height by 2 mm. This is made possible by the two spiral-like pressure surfaces 65, 68 on the upper adjusting disk 13 pointing in the printing direction x.

The pressing depth of the device is determined in this way.

The lower adjusting disk 14, which is supported on the upper adjusting disk 13, serves to adjust the insulation crimp and is supported by the upper adjusting disk 13. The middle adjustment wedge 130, which is guided in the pressure block 78, bears against it. This adjusting wedge 130 transmits the force to the insulation crimper.

It should be noted that the described inclined pressure surfaces 61, 68, 97 _d , 98 _d , 108 are self-locking. In addition, the described grids are attached, which enable precise setting to 0.02 mm.

Claims (11)

Device for connecting a wire with a contact element or the like. by deforming clamping elements by means of pressure elements of a crimping tool which can be exchangeably arranged in a press,
characterized,
that an adjusting disk (13), which is rotatable about the axis (A) of a locking bolt (16) or the like holding member and is provided on the pressure member side, is associated with a further adjusting disk (14) on the clamping member side, both adjusting disks each having at least one in the pressure direction (x) helically rising ring surface (65,68,108) are provided. Apparatus according to claim 1, characterized in that each ring surface (65,68,108) has a radial step edge (66,69; 110) as a boundary between the beginning and the end of the climb, the heights (i₁) of the step edges (66, 69; 110) are the same. Apparatus according to claim 1 or 2, characterized in that the two adjusting disks (13, 14) lie coaxially one on top of the other and the clamping-organ-side adjusting disk (14) encloses a pressure plate (15) which is associated with a surface (96) of the other adjusting disk (13). Device according to one of claims 1 to 3, characterized in that the pressure plate (15) is dimensioned so that it can be inserted into a central recess in the adjusting disc (14) and on its surface (96) with two partially circular pressure surfaces (97 _d , 98 _d ) rising surface is provided as support points for the adjusting disk (13) above. Apparatus according to claim 3 or 4, characterized in that the pressure plate (15) on the other surface (99) is equipped as a bearing surface with a wedge-like locking lug (100) protruding therefrom, the locking lug (100) of the pressure plate (15) in an edge groove (146) of a pressure block (78) axially adjoining an adjusting disk (14) can be inserted. Device according to one of claims 1 to 5, characterized by a pitch clockwise at a height of the ring surface (65,68; 108) or the pressure surface 97 _d , 98 _d ) of 2.18 mm, an outer diameter (e₁, e₄) of the adjusting disc (13, 14) measures 56 mm or an outer diameter (d₃) of the pressure plate (15) 42 mm. Device according to at least one of claims 1 to 6, characterized in that the lower surface of the adjusting disk (14) is assigned the desk-like surface (132) of an adjusting wedge (130) and the latter is movably attached to the pressure block (78) on the clamping element side. Device according to at least one of claims 1 to 7, characterized in that the circumference (102) of the pressure plate (15) is toothed in parallel to the axis. Device according to at least one of claims 1 to 8, characterized in that the adjusting disk (14) radially adjacent to the pressure plate (15) has an inner surface (114) which meshes with the toothed periphery (102) of the pressure plate. Device according to at least one of claims 1 to 9, characterized in that the adjusting disk (14) radially adjacent to the pressure plate (15) has at least one latching element (122) which engages in the toothing (103) of the pressure plate. Device according to at least one of claims 1 to 7, characterized by at least one axially parallel locking element (124) of the one adjusting disk (14), which can be inserted into a counter detent (126) of the other adjusting disk (13).

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