DE102008002512B4 - Crimping pliers with adjustable replacement die - Google Patents

Abstract

Crimping tool with an open crimping die for producing a crimp connection, comprising a frame (05), a first and a second die part (04, 06), which are drivingly connected via the frame (05), each with a handle (02, 03) , wherein when closing the handles (02, 03) the two die parts (04, 06) are brought closer to each other in a pressing stroke, the die parts (04, 06) each having a first and second die element (07, 16), the one another are arranged opposite one another and when the crimp die is closed leave an opening (17) free as a mold for receiving a crimping sleeve to be crimped, characterized in that an adjusting means (08) is fastened to the first die part (04), with which the position of the first die element (07 ) in the associated first die part (04) in the direction of the second die element (16) is variable in order to the cross section of the remaining at full press through stroke between the die elements Öffnu (17), the first die part (04) together with the adjusting means mounted thereon (17).

Description

The The invention relates to a crimping tool for producing a crimp connection preferably of a plurality of electrical conductors according to the preamble of claim 1. A generic crimping tool has a two-part Frame with two die elements, preferably a die and a Stamp. When closing Crimping tool is inserted in a crimping crimping sleeve, in which the Head is inserted, compressed. The crimping tool can as well for the Making a connection between a crimp contact and a Cable end can be used.

at a splice connection become common two or more wires or lines continuously connected. It is also possible to to attach an electrical connector to a continuous cable without cutting the cable. There are different ones for this Procedures and tools. The invention relates predominantly, but not exclusively on the splicing of copper wires.

today are used to connect copper wires mostly solder, screw and possibly stripping Applied techniques that make the copper wires faster and easier to connect. For example, wire connection sleeves and used other crimp connectors in which the two are to be connected Cores, without being stripped, inserted into the wire connection sleeve which is then compressed with special pliers, wherein the electrical connection is made by insulation displacement contacts becomes. The approximately 2 cm long wire connecting sleeves consist of contact, Pressure and insulation part.

at crimp splices The stripped wire ends are inserted into a crimp barrel and then into the sleeve pressed together. Before inserting into the crimp barrel, the Wire ends in addition be twisted. By the compression of the wires in and with the Crimp barrel arises an insoluble one electrically conductive connection. When using uninsulated Crimping sleeves is about the splice a previously threaded on the vein insulating sleeve pushed and shrunk, for example. Partially, too outward insulated crimp sleeves used.

Out Many pliers and devices for manufacturing are known in the art a splice connection known.

The US 3,783,487 describes, for example, an improved cable splice connection for connecting two cables and a tool for making this connection. The device comprises two die housings each having a stop surface and a semicircular die with inwardly projecting spherical notching elements. The inserted into a sleeve cable ends are first inserted into a die part. The second die part is positioned over and fixed by guide pins. Subsequently, the two housing halves are pressed together until the stop surfaces come to rest on each other. The notching elements thereby make the press connection between the cable ends and the sleeve. An adaptation of the tool to different types of sleeve or diameter is not provided.

The US 4,385,515 proposes a tool for making a crimp splice with which different strength calibrated crimp connections can be made. Calibrated crimp connections are understood here to mean that the crimp barrel is pressed into a defined shape, here a rhombus, by means of shaped dies. A pliers-like tool is described, which comprises a plurality of juxtaposed V-shaped die elements of different sizes on a first die part, wherein a second die part has a larger V-shaped main die. To set the desired crimp size, the first die part is linearly displaceable, so that in each case a different die element is opposite to the main die. The die parts are hinged together and can be swung open to insert a crimping sleeve into the die. In the closed state, the die parts form a rombenförmige opening which corresponds to the shape of the later-compressed sleeve. For pressing the die parts are manually beaten against each other. For cable connections small cross sections, this device is not suitable.

The EP 1 329 989 B1 describes a connecting sleeve for producing a crimp splice connection on the one hand very thin lines, on the other hand, but also with different wire diameters. Due to the special design of the connector, both parallel and cross-splice connections are possible. Through various slots and recesses, which are provided in the annular sleeve, the connector can be deformed depending on the number and thickness of the inserted wires in various end shapes, always with a secure pressing is achieved. The crimping process can be easily done with simple hand tools, such as ordinary pliers, due to the special shape of the connector.

From the DE 1 180 019 is a crimping tool with a closed annular die holder known. With a die set it is possible various sizes and types of electrical connection elements with open lugs to press. This is a pair of pliers for the assembly of cables, ie for attaching various connection elements to a cable end. During the crimping process, the clamp to be attached is fixed inside the pliers and thus moved to the correct position relative to two die sets. The first die set bends the tabs of the clip around the insulation of the conductor, the second die set bends the corresponding tabs around the stripped part of the cable. The movement of the die sets along a control cam approximates the die and male, and the shaping ensures correct deflection of the flags. Such terminals are hardly used today.

From the WO 94/24733 For example, a tool is known for simultaneously pressing a plurality of insulated wires in an electrical connector, wherein connectors of different heights can be processed. The insulated wires are first inserted into a connector with insulation displacement contacts. The connector is held in a splicing head and pressed with a pressing member in the U-shaped insulation displacement contacts. The pressing member is adjustable in predetermined stages relative to the splicing head. By a predetermined adjustment of the position of the pressing member of the pressing stroke starts from a different starting position, which is adapted to the height of the respective connector. The pressing member can be adjusted, for example via an intermediate member which is rotatable about an axis. The intermediate member may be designed as an eccentric or with recesses, so that in each case a different distance between the splicing head and pressing member is preset at a rotation of the intermediate member. The splice head is clamped to the tool via a lever-pin mechanism. During the pressing process, this connection is subjected to the entire pressing force.

The GB 845,334 shows a crimping tool in the various Crimpprofile are adjustable by turning the die parts.

The EP 0 271 606 B1 describes a hand tool for pressing connectors on ribbon cables. The distance of the Gesenk parts to each other can be adjusted by a pivot on an eccentrically mounted, polygonal support member.

The US 2005/0050940 A1 describes a crimping tool with a two-part crimp die in which the height of the crimp for the insulating layer is adjustable. In the case of the tool shown here, a relative adjustment of the stamp for the insulation crimp with respect to the die takes place. The adjustment is made with an eccentrically mounted polygon. The press stroke is adjusted by setting the dead center of the ram.

The not pre-published DE 20 2007 018 838 U1 describes a crimping tool with an open crimping die, comprising two die parts, each having a die element, are arranged opposite to each other and leave open when the crimp die is closed as a mold for receiving a crimping sleeve to be pressed. The die parts are associated with a drive, by which they are approximated in a pressing stroke each other to connect the crimp barrel frictionally engaged therein conductors. Furthermore, an adjusting means is provided, with which the position of at least one die element in its associated die part in the direction of the other die element is variable to adjust the cross section of the remaining at full travel through the pressing stroke between the die elements opening. If this crimping tool can no longer be adapted to another crimp connection solely by adjusting the variable die element but the die parts have to be replaced, this leads to the loss of the set position of the die parts relative to one another. In case of frequent replacement of the die parts, the adjustment must be made over the adjusting means again and again.

From the international application WO 98/56081 A1 is a closed crimping tool for the simultaneous production of a micro-contacting and crimping known. The pliers carry an insert which carries both a two-part crimping die and a toothed segment for contacting a micro connector. The penetration depth of the toothed segment is adjustable by means of an eccentric shaft. The crimping dies are fastened in the insert by means of screws and exchangeable, but not adjustable.

Of the Invention is based on the object, an improved crimping tool to provide for the manufacture of crimp connections, which allows the rapid change of one or both die parts, wherein the set position of the adjustable Gesenkelements in his associated Die part should be preserved.

The The object is achieved by a crimping tool with the features of the claim 1 solved.

The advantages of the invention are to be seen in particular in the fact that it is possible with the new type of crimping tool to be able to process different crimping sleeves with a single tool, with a consistently good crimped connection between the conductors and the crimping sleeve The open crimp die allows the cable to thread in and out on the side, which can be beneficial in confined spaces and is essential for creating a splice-cimp connection. Closed dies can not be used in such cases as they could not be removed from the cable after making the connection from two ends of the cable.

Especially it is advantageous that the adjusting means on the first die part adjustable is attached or stored and this first die part in common with its associated adjustable die element and the actuating means releasably on Frame of the crimping tool is attached. This allows the die part be removed from the crimping tool with the adjustable die element, without thereby changing the relative position of the die element in the associated die part. For a tool can In this way, several different die parts with integrated Stellmitteln be kept, which exchange very quickly to let. A readjustment of the die element by pressing the Adjusting agent is not required after such an exchange what the set-up time for the tool overall lowers.

The Invention will be described below with reference to a crimping tool.

A Crimping tool according to the invention for connecting a plurality of conductors in a crimping sleeve comprises a two-part Crimping die, wherein each of the die parts associated with a pliers handle is. The handles are driveable with the die parts over a powerful translated Drive, preferably a toggle lever, connected, so that when closing the Handles the crimping die is closed, wherein at the die parts the needed Pressing force is applied. The thereby completed pressing stroke is through the touch preferably two stop surfaces limited, which are provided on each die part.

In the die parts are preferably a die as die elements and a punch (male) arranged, which when closing the Gesenkes approximated be and remaining in the end position opening between the die and Stamp the shape and size of the finished Crimp connection determined.

The Forceps include of course Also, a device, such as a Zwangsgesperre, the opening of the Pliers in front of the whole Go through the press stroke and thus before completing the crimping process prevented. Such devices are known in the art.

According to the invention Size or height of between die elements die and punch in the closed End position remaining opening Adjustable by at least one of the die elements in each Die part preferably mounted movably in the stroke direction and in different Positions is detectable. The displaceability in the stroke direction guaranteed that during the pressing process no tilting of the adjustable crimping element can be done. It does not matter if the stamp or the die are adjustable, or if other die elements for manufacturing the crimp connection can be used.

For the movement and determination of the die element, an adjusting means is provided, which is arranged in the die part of the element to be adjusted is.

The stop surfaces are not changed, so that in each setting of the crimp the predetermined and preset necessary press stroke to achieve a secure crimp connection is achieved. This has for the operator an increased Comfort results, because a constant Presshub allowed an ergonomic design of the handles and the distance between this. Furthermore is the tactile feedback independent of the set crimping section, so that it for the user is easier to carry out the crimping process quickly.

Around the flexibility of the crimping tool with regard to the realization of a wide variety of crimp connections continue to increase is at least the first die part, which is the adjustable die element includes, interchangeably attached in the tool. For this is this Gesenkteil connected to the actuating means, so that the complete unit solvable on Tool is attached. For the desired replacement of the die element (eg stamp) are the associated actuator together with the die part changed. Actuator and die part are so with each other connected that the relative position of the adjustable Gesenkelements remains unchanged within its die part when the die part of Tool is removed or attached to this again. The first Die part can, for example, by a screw, clamp or Locking connection are attached to the tool.

Conveniently, is also the other die part interchangeable, possibly single or in pairs with the first die part.

The Forceps can in special embodiments next to the mentioned Adjustment means further means for fine adjustment of the Presshubes include.

The said adjusting means may be formed for example by an eccentric or a polygon, which is preferably mounted rotatably about a control axis in the die part, in which the crimping element (die element) is adjustable. The crimping element is movably mounted in the die part and has a control surface which acts on the setting means. The movement of the crimping element is limited by a suitable guide, for example a groove in the die part, in the direction of the pressing stroke. Upon rotation of the actuating means about the adjusting axis, the crimping element is displaced according to the distance of the control surface from the axis.

The Adjusting means is in a preferred embodiment of the invention a pentagonal Adjusting disc whose edges each have a different vertical distance have to the adjusting axis. It is by each edge distance a represents another crimping measure. The control surface of the crimping element is at each of the five possible distance settings defined on an edge of the adjusting disk.

The Polygon shape has proven to be particularly advantageous for the actuating means, because here is an independent Adjustment of the crimping element is not possible. Due to the necessary overcoming of the Polygon corners on rotation of the actuator and the safe system the control surface takes the adjusting means with respect the control surface only secure layers. The polygon can vary depending on the type, number and size of the different ones to be processed crimp sleeves for example, four, five or have six corners.

But Other forms of the actuating means with two or more control surfaces are in the context of the invention.

A preferred embodiment The invention is illustrated in the figures and will be described below explained in more detail. It demonstrate:

1 a side view and a sectional view of a crimping tool according to the invention with an adjustable die;

2 a detailed view of a die with an adjustable crimping element;

3 a detailed representation of Gesenkes according 2 with a different setting of the crimping element;

4 a detailed perspective view of the crimping tool with removed die parts.

In 1 is a crimping tool according to the invention 01 shown. Fig. A) shows the pliers 01 in a partially broken view, Fig. b) is a sectional view along the line AA in Fig. A).

The forceps 01 includes two handles 02 . 03 , which are drivingly connected to a two-part crimp die and other frame parts, which follow only as a frame ( 05 ) are designated. The two-part crimping die comprises a first die part 04 which the handle 02 is assigned and a second die part 06 which the handle 03 assigned. The handles 02 . 03 are drive-effective via a toggle lever drive with the die parts 04 . 06 connected, while closing the handles 02 . 03 the crimping die is closed by passing a defined pressing stroke. In the illustrated open state, the die is opened so far that the wires to be mounted in the crimp contact can be inserted from the front into the die and removed after crimping in this direction together with the crimp contact. This is necessary in the manufacture of splices if the connected wire ends can not be pulled axially out of the die.

The first die part 04 comprises a die as the first die element 07 which is displaceable in the first die part 04 is arranged. In this case, a guide of the die 07 in the die part 04 in a groove extending in the stroke direction. As adjusting means for the displacement of the die 07 in this groove is a pentagonal adjusting disc 08 on a positioning axis 09 in the first die part 04 rotatably mounted. The adjusting disc 08 has five edges at its periphery 11-1 to 11-5 on, which in each case a different vertical distance a to the adjusting axis 09 to have. The matrix 07 has a control surface 12 on, which in the operating state at each edge 11 the adjusting disc 08 all over.

For adjustment of the matrix 07 becomes the adjusting disc 08 around the adjusting axis 09 turned to another of the edges 11-1 to 11-5 opposite the control surface 12 the matrix 07 to arrange. This is on the adjusting disc 08 a set screw 13 intended.

An unillustrated holding element, for example a spring, is in the first die part 04 provided to the die 07 To secure against falling out of the die and the investment of the control surface 12 on one of the edges 11-1 to 11-5 the adjusting disc 08 to ensure.

The first die part 04 further comprises a two-part stop surface in this embodiment 14 , which after passing through the pressing stroke on a stop surface 15 of the second die part 06 comes to the plant. The stop surface 15 here is also divided into two parts.

The second die part 06 comprises as a second die element a stamp 16 which when closing the handles 02 . 03 opposite the die 07 comes to rest, so that an inserted into the die, not shown crimping into the through the die 07 and the stamp 16 given shape is pressed.

2 and 3 each show a detail of the pliers according to the invention 01 with a setting of the die 07 for larger and smaller crimp sleeves. The forceps 01 is shown closed in both cases.

The stop surfaces 14 . 15 the die parts 04 respectively. 06 Touch each other when the press stroke is through and the handles 02 . 03 are closed. After reaching this state, the crimping process is completed. Between the matrix 07 and the stamp 16 then there remains an opening 17 which represents the final cross-sectional shape of the crimp after crimping.

There is a washer on the set screw 18 attached, on which a mark, for example, "1.2" and "1.3", is applied. The set screw is secured against rotation. An index 19 is on the first die part 04 intended. To adjust the remaining opening, the set screw is raised against a spring force and can then be rotated, whereby the setting for the remaining opening 17 is made. The marker corresponding to the index 19 is the currently set crimp height.

In 3 It can be seen that after a rotation of the adjusting disc 08 around the adjusting axis 09 the size of the opening 17 has become smaller. The mark 19 opposite section of the marker 18 indicates the size of the remaining crimp opening. The Stamp 16 penetrates further into the matrix in this setting 07 On, however, the end stop of the pressing stroke is unchanged by the stop surfaces 14 . 15 certainly. The way of the pressing stroke thus remains unchanged.

4 shows a perspective detail view of the pliers head. In the front area of the pliers head is the frame 05 through two parallel frame plates 21 formed between which the die parts 04 . 06 are releasably used. It can be seen that the first die part 04 with the die arranged therein adjustable 07 and the adjusting disc 08 forms a compact assembly that can be removed as a whole from the pliers head. The first die part can therefore be removed from the frame, without affecting the position of the die caused by the actuating means 07 within the first die part 04 Has. After inserting the die parts 04 . 06 between the frame plates 21 the die parts are there with retaining screws 22 secured against falling out. The power dissipation during crimping is done by the die parts 04 . 06 over bearing edges 23 to the frame 05 ,

01

tongs

02

handle

03

handle

04

die part, first

05

frame

06

die part, second

07

die

08

adjusting disk

09

axis

10

11

edge

12

control surface

13

screw

14

stop surface

15

stop surface

16

stamp

17

opening

18

disc

19

index

20

21

frame panels

22

retaining screws

23

support edges

Claims (11)

Crimping tool with an open crimping die for producing a crimp connection, comprising a frame ( 05 ), a first and a second die part ( 04 . 06 ), which over the frame ( 05 ) each with a handle ( 02 . 03 ) are drivingly connected, wherein when closing the handles ( 02 . 03 ) the two die parts ( 04 . 06 ) are approximated in a pressing stroke, the die parts ( 04 . 06 ) each have a first and second die element ( 07 . 16 ), which are arranged opposite to each other and with closed crimp die an opening ( 17 ) as a mold for receiving a crimping sleeve to be pressed free, characterized in that on the first die part ( 04 ) an actuating means ( 08 ), with which the position of the first die element ( 07 ) in the associated first die part ( 04 ) in the direction of the second die element ( 16 ) is variable to the cross-section of the remaining at full travel Presshub between the die elements opening ( 17 ), wherein the first die part ( 04 ) together with the adjusting means ( 08 ) and the associated adjustable first die element ( 07 ) on its own detachable on the frame ( 05 ) is attached. Crimping tool according to claim 1, characterized ge indicates that the two die elements have a stamp ( 16 ) and a die ( 07 ) and either the relative position of the matrix ( 07 ) and / or the relative position of the stamp ( 16 ) in the respectively associated die part ( 04 . 06 ) is adjustable by the adjusting means. Crimping tool according to claim 1 or 2, characterized in that a limitation of the pressing stroke by a on each die part ( 04 . 06 ) provided fixed stop surface ( 14 . 15 ) he follows. Crimping tool according to one of claims 1 to 3, characterized in that the adjusting means a control disc ( 08 ) is in the form of a polygon, each edge of the polygon being at a different perpendicular distance a from a positioning axis ( 09 ), around which the adjusting disc ( 08 ) pivotable on the first die part ( 04 ), and that the swaging element to be adjusted with a control surface ( 12 ) provided with the control surface ( 12 ) facing edge of the adjusting disc ( 08 ) engages with which the respective, the control surface ( 12 ) associated vertical distance a determines the relative position of the die element in the die part. Crimping tool according to claim 4, characterized in that the adjusting disc ( 08 ) has a pentagonal shape. Crimping tool according to one of claims 1 to 3, characterized that the adjusting means an eccentric pin or guided in a groove sliding block is, with clamping elements are provided to the set position of the actuating means. Crimping tool according to one of claims 4 to 6, characterized in that on one of the adjusting screw ( 13 ) provided disc ( 18 ) a plurality of markings are applied, their relative position to one on the first die part ( 04 ) or on the rack () attached index ( 19 ) the measure of the remaining opening ( 17 ). Crimping tool according to one of claims 1 to 7, characterized that it continues to include a compulsory detention order that will open the Handles prevented before the press stroke is completed. Crimping tool according to one of claims 1 to 8, characterized that open the crimping die so far is that the crimped crimp sleeve is transverse to their longitudinal extent can be removed from the crimping die. Crimping tool according to one of claims 1 to 9, characterized in that the first die part ( 04 ) via a detachable clamping, screw or locking connection on the frame ( 05 ) is attached. Crimping tool according to one of claims 1 to 10, characterized in that furthermore also the second die part ( 06 ), detachable on the frame ( 05 ) is attached.