DE102004043776B3 - Motor-driven crimping device - Google Patents

Abstract

Crimping device comprises a machine stand (1) with crimping tool pairs (2, 3), a drive (5) for moving the crimping tools and sensors (4.1, 4.2, 4.3) for determining the crimping force produce in the direction of the crimping tool (2). Each sensor and the drive are connected to signal lines. Preferred Features: The sensors are pressure sensors arranged between the machine stand and the crimping tool (2). An adjusting part with a pressure sensor is also provided and has an electric motor.

Description

technical area

The The invention relates to a motor-driven crimping device.

Such a crimping device is from the EP 0499 141 B1 known. It is used in the common crimping of multi-core, electrically conductive cables of different diameters and includes a signal-actuated electric motor for displacing the displaceable crimping tool. However, it is necessary to match the size of the displacement of the crimping tool exactly with the thickness of all cables to be determined and with the size of the applied, common crimp connector in order to obtain a perfect crimping result on all wires. If, on the other hand, only one too thick cable or too thick a crimp connector is used, based on the tuning done, then damage to the crimping tools, the crimped connector and / or the cable can occur. This is especially of great disadvantage if the error is not noticed and the power line is disturbed in at least one cable.

From the US 5 1091 651 A and the EP 1 211 761 A1 Crimping devices are known for producing a crimped connection on a single cable, in which the relatively movable crimping tool is supported directly on a pressure sensor in order to already provide a signal proportional to the crimping force. The dimensioning of the pressure sensor considerably exceeds that of the cable to be crimped.

From the US 6 619 088 B1 For example, a press is known in which a plurality of pressure sensors are arranged under a stationary mounted press tool to determine disturbance-related deviations of the pressing force from a standard value. Also in this embodiment only relative deformations of a single tool are detected.

From the DE 43 37 796 A1 It is known to detect the forces determined during a crimping process as a measurement curve to compare with a reference curve. An indication of the structural design of the measuring device is the reference can not be removed.

From the DE 298 00 915 U1 and the US 5,704,110 Crimping tools are known in which the crimping force of a single crimping tool is measured, compared with a desired value and used to dispose of faulty crimp connections.

presentation the invention

Of the Invention is based on the object, a crimping device show that ensures that for parallel crimping of crimp connectors on multicore cables a proper power line in all the wires and through a feeder too thick cables or faulty crimp connectors no damage to the single crimping tools can occur more.

These Task is according to the invention in a Crimping tool of the type mentioned by a device solved, having the features of claim 1. In advantageous embodiments take the subclaims Reference.

The according to the invention, motor driven crimping device comprises a machine stand with a plurality of Crimpwerkzeugpaaren, each by a displaceable in the machine stand Crimping tool and by a non-displaceable in the machine frame crimping tool are formed, with the immovable crimping tools by itself parallel to each other extending pins are formed in a common leadership a transmission housing movably received in the printing direction and in each case at least one Sensor for detecting the displacement of the displaceable Crimping tools in the direction of the immovable crimping tools resulting Crimping force is assigned, which is one of the crimping force proportional Signal provides, wherein at least one by a first signal actuatable, motorized Drive for the displacement of the displaceable crimping tools in the direction of immovable crimping tools is provided, each sensor and the drive are signal-conducting connected and wherein a controller a return of all slidable crimping tools in their initial position causes the Occurrence of a second signal on at least one sensor, the one arbitrarily exceeds the adjustable threshold.

Thus, in such a case, no self-contained crimping takes place, which is immediately recognizable to the operator or can be made clear by a separate display. The too thick cable and / or the incorrectly supplied or too thick crimp connector can be easily replaced by a correct element and then the operation can be continued without causing damage to the crimping device or a faulty crimped connection. Time-consuming repairs and service interruptions of the crimping device and zeitaufwän Dige controls are therefore no longer necessary.

Around damage To avoid the crimping device, it is sufficient in itself, the motor when crossing immediately to silence the threshold and, for example, one Use brake motor as motor. However, such engines are more expensive than conventional engines and there is a loss of time until the initiation of the backward movement of the movable crimping tool in its initial position. According to the invention Therefore, a tyristor controlled design is preferred in which the backward movement immediately followed by the interrupted forward movement.

The Device is particularly useful for applications where at least three Crimpwerkzeugpaare are provided parallel to each other. such Training courses, for example, when crimping usual Safety plug on supply cables from household appliances to application. They comprise at least three adjacent, coincidental trained Crimpwerkzeugpaare, the same time and parallel to each other actuated be matched around the three adjacent, matching Contacts of such connector simultaneously with the three wires of the cable connect to. An application of the invention to applications in determine the crimp connectors on 10 or more wires of a cable are, this is not contrary.

The Invention can therefore also with respect to the assembly be used by multiple connectors, the u. U. much more as three matching designed, side by side wires and contacts have and the e.g. used in the power or EDP area can.

Of the Sensor can depend on from the special assignment to the movable and / or immovable Crimping tool, the machine stand and / or the engine to be a push or pull sensor. He prefers to record the size elastic Deformations resulting from the intended use of the crimping device at the dormant or moving parts, if several Cores are to be equipped with crimp connectors.

at a particularly easy to manufacture design of the crimping device according to the invention is It provided that between each immovable crimping tool and the machine stand an independent is arranged by the other pressure sensors effective pressure sensor, related to the rest Crimping tools. The individual pressure sensors can thus be in a central Receiving plate be integrated, that occurring during the crimping process crimping each of the Crimpwerkzeugpaare be detected independently. Such installation of the sensors requires that the contained therein probe to the extent necessary and independent are deformable from each other. For most sensors this is sufficient for a deformability on the order of a few hundredths of a millimeter. The instructions for use of such commercially available sensors give closer Information desk. They are partly designed so small that a dense adjacent arrangement in a small space is possible without having a Mutual influence of the measurement results. The crimping tools are all up stored or contain such pins, relatively movable pins around the forces occurring in the crimping tools on remotely mounted Transmit sensors. these can for example, on different levels one above the other, next to each other and / or be distributed one behind the other to the required for the accommodation To create space.

alternative or in addition Such a pressure sensor can also be placed in the slot of the displaceable crimping tool be integrated. Under the actuator are within the scope of the invention to understand all parts of the crimping device used in the transmission the movement forces of the motor are included in the slidable crimping tool, especially the components of the possibly used Transmission, push rods, levers, wedge adjustments and / or a connecting rod and / or a link drive.

in the The simplest case is enough it, only one central drive for all sliding crimping tools to disposal to have. This can be a by a pressure medium or by electrical Power actuated Engine include and in particular from a piston / cylinder unit or an electric motor. However, this does not exclude that every displaceable crimping tool if necessary by its own motor can be displaced.

In the simplest case, an electric motor is used, in particular an electric motor with a rotor rotating about an axis, which is connected by a gear with the displaceable crimping tool. It may be provided according to an advantageous embodiment, that between the rotor and the movable crimping tool cooperating with a threaded rod threaded rod is provided, which together form the rotational movement of the rotor in a transverse movement of the mother and the movable crimping tool. It is expediently provided in such a design that between the electric motor and the displaceable crimping tool, a transmission housing is provided, in which the threaded rod axially immovable and rotatable and axially displace the threaded nut bar and is recorded non-rotatably. In order to reduce the height, the gear housing and the motor housing can be arranged side by side lying and the threaded rod and the rotor of the electric motor to be connected by a belt drive. Such a belt drive offers the advantage, with extremely low production costs, that the presently desired, very large transmission ratios can be realized very easily.

If an electric motor for displacement of the displaceable crimping tool If it is used, it offers itself, in addition or alternatively one Sensor to use, resulting from the crimping process Crimping force on the basis of the current consumption of the engine recorded and in the needed to control the crimping, second signal transforms. Such sensors are also commercially available. The current change However, the engine has, based on those in the crimping process on the crimping tools resulting force relationships, a time shift on, which is due to the long gear ratio. A Detection of crimp force ratios directly on the crimping tool is therefore preferred within the scope of the invention.

The The advantages achieved by the invention are, above all, that a damage the crimping device during the intended use even with a faulty feeder cables, in particular cables that are too thick, and / or faulty cables Crimp, is excluded. As a result, machine failures occur such causes no longer up. Within normal wear rates, the used for applications reaching crimping tools much longer be as before, without a readjustment is necessary. It is also possible declare the obtained compounds individually as "controlled error-free", which is economically advantageous.

Summary the drawing

1 shows an exemplary embodiment of the crimping device according to the invention in a perspective view from the front

2 shows the in 1 used crimping module in an enlarged view.

Execution of the invention

In the 1 shown crimping device consists of a machine stand 1 with multiple crimping tool pairs, each through one in the machine stand 1 sliding crimping tool 3 and by a in the machine stand 1 immovable crimping tool 2 are formed, wherein at least one operable by a first signal, motor drive 5 for moving the sliding crimping tools 3 Direction of the immovable crimping tools 2 is provided.

The crimp tool pairs are combined in a replaceable module, 2 , which releasably after in the crimping 1 can be used and exchanged in a few simple steps. The module is adjustable outside the crimping device, which promotes economic efficiency. It consists essentially of a base plate 6 holding the immovable crimping tools 2 includes rigidly mounted column guides 7 with a vertically mounted upper yoke 8th and three towards the immovable crimping tools 2 sliding crimping tools 3 who are rigid in the upper yoke 8th are stored and form in this embodiment components of a single, unseparated plate. The Oberjoch 8th is through a mushroom head 9 from the front in a downwardly open, C-shaped leadership of a backdrop 10 insertable and vertically displaceable by these. The relative distance can be determined by the relative rotation of two adjusting discs 12 change, which rest with not shown screw threads on each other and depending on the size of the relative rotation together can have a different support height. The upper of the support discs is directly by a compression spring, not shown, to the underside of the backdrop 10 pressed on and acts as a pressure plate. About them are the pressure forces from the backdrop 10 on the sliding crimping tools 3 transfer.

In the scenery 10 That's one end of a connecting rod 11 with a bolt extending perpendicular to its direction of movement 13 stored. The other end of the connecting rod is on an eccentric shaft 14 of the drive 5 stored. This includes a gearbox and a belt drive in addition to an electric motor. If the drive is actuated, then this has a circular movement of the eccentric shaft 14 and as a result, a vertical reciprocating motion of the scenery 10 and at the same time the sliding crimping tools 3 in the direction of the immovable crimping tools 2 result.

The immovable crimping tools 2 are formed by columnar pins which move together and independently of each other in a rigid guide 15 the base plate 6 are stored. The mobility of the pins can be limited to a few mm. By the term "immovable" is thus meant in the context of the invention that the affected crimping tools are not directly by the drive 5 are displaceable but only indirectly by those forces caused by the slidable crimping tools while performing Crimping be exercised on them. The pins are for this purpose independently and preferably with compression springs movable on the sensors 4.1 . 4.2 . 4.3 mounted, which are formed in the embodiment shown by pressure sensors and accommodated in a base plate arranged under the base plate. The base plate contains the electrical connections of the sensors 4.1 . 4.2 and 4.3 , The electrical connections therefore need not be solved for a replacement of the module.

One for each crimping tool pair 2 . 3 is thus a sensor 4.1 . 4.2 . 4.3 for detecting the case of a displacement of the displaceable crimping tool 3 associated crimping force that provides a crimping force proportional, the second signal. Each of the sensors 4.1 . 4.2 . 4.3 and the motor drive 5 are signal-conducting connected so that a return of all sliding crimping tools 3 is brought into its initial position when a second signal to at least one sensor 4.1 . 4.2 . 4.3 that exceeds an arbitrarily adjustable threshold.

Of the Threshold in which a return of all slidable crimping tools in their starting position not yet effected but the crimping process is completed and completed continuously is equivalent to a value at which by the crimping process obtained crimped the required properties with certainty and completely is free from mistakes. His achievement can be harnessed to the obtained crimp connection z.b. with a stamp as controlled to mark without errors.

Becomes the threshold value of the crimping force, on the other hand, has exceeded at least one crimping tool pair, then this corresponds to a total erroneous crimp connection. This can be eliminated immediately.

Of the Threshold is z.b. then exceeded, if too thick cable or a faulty crimp connector so introduced that will be carried out the crimping process a damage at least one Crimpwerkzeugpaars can result. These are significant greater forces required as for a normal crimping process. Setting the right values Therefore, the expert prepares no difficulties. It requires at most few attempts.

In order to make it possible to detect an exceeding of the threshold value, the electromotive drive is 5 provided with a control, not shown in the drawing, which causes a comparison of the second signal with the threshold value and when the threshold value is exceeded, a reversal of the drive 5 and thus an immediate return of all sliding crimping tools 3 causes in their starting position. This is characterized by the fact that the faulty crimp connection can be discarded in order to re-introduce further cables and crimp connectors to be processed into the crimping device and to be able to continue the work.

At the in 1 shown design three Crimpwerkzeugpaare are provided. The sensors 4.1 . 4.2 . 4.3 are designed as pressure sensors and under the immovable crimping tools 2 arranged so that the crimping forces can be detected independently of each other and converted into the second signal. Of course, it is also possible to generate the second signal in a different sensor. Narrow space at the measuring point can even force such training.

The signal-conducting connections between the sensors 4.1 . 4.2 . 4.3 and the controller and between the controller and the drive 5 are not shown in the illustration. They consist of conventional cable connections, which are connected by plug-in connections releasably connected to the respective unit or module.

Claims (11)

Motor-driven crimping apparatus comprising a machine stand ( 1 ) with several crimping tool pairs ( 2 . 3 ), each by a in the machine stand ( 1 ) displaceable crimping tool ( 3 ) and by a in the machine stand ( 1 ) immovable crimping tool ( 2 ), wherein the non-displaceable crimping tools ( 2 ) are formed by mutually parallel pins, which in a common leadership ( 15 ) of a transmission housing ( 9 ) are received movably in the printing direction and in each case at least one sensor ( 4.1 . 4.2 . 4.3 ) for detecting the displacement of the displaceable crimping tools ( 3 ) in the direction of the non-displaceable crimping tools ( 2 ) is assigned, which provides a crimp force proportional signal, wherein at least one actuatable by a first signal, motor drive ( 5 ) for moving the displaceable crimping tools ( 3 ) in the direction of the non-displaceable crimping tools ( 2 ), each sensor ( 4.1 . 4.2 . 4.3 ) and the drive ( 5 ) are connected signal-conducting and wherein a controller is a return of all sliding crimping tools ( 3 ) when a second signal appears on at least one sensor ( 4.1 . 4.2 . 4.3 ) exceeding an arbitrarily adjustable threshold. Crimping device according to claim 1, characterized in that in the crimping tools occurring forces can be transmitted by the pins on remotely mounted sensors. Crimping apparatus according to claim 1 or 2, characterized in that at least three pairs of crimping tools ( 2 . 3 ) are provided. Crimping device according to one of claims 1 to 3, characterized in that the sensor ( 4.1 . 4.2 . 4.3 ) is a pressure or tension sensor. Crimping device according to one of claims 1 to 4, in which each sensor ( 4.1 . 4.2 . 4.3 ) is designed as a pressure sensor, characterized in that the pressure sensors between the machine stand ( 1 ) and the non-displaceable crimping tools ( 2 ) are arranged. Crimping device according to one of claims 1 to 5, characterized in that between each displaceable crimping tool ( 3 ) and the scenery ( 10 ) is arranged independently of the other pressure sensors effective pressure sensor. Crimping device according to one of claims 1 to 6, characterized in that the backdrop ( 10 ) itself comprises a pressure sensor. Crimping device according to one of claims 1 to 7, characterized in that the motor drive ( 5 ) comprises an electric motor. Crimping device according to claim 8, characterized in that that the electric motor is so tyristor controlled that a Backward movement immediately to an interrupted forward movement followed. Crimping device according to claim 8 or 9, characterized in that the electric motor contains a rotatable rotor and that between the rotor and the movable crimping tools ( 3 ) a gear and a through a connecting rod ( 11 ) sliding backdrop ( 10 ) is arranged. Crimping device according to one of claims 1 to 10, characterized in that a sensor is provided which the crimping force over the current consumption of the motor detected.