EP0473036B1 - Wire bending machine for insulated wire - Google Patents

Wire bending machine for insulated wire Download PDF

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Publication number
EP0473036B1
EP0473036B1 EP91113832A EP91113832A EP0473036B1 EP 0473036 B1 EP0473036 B1 EP 0473036B1 EP 91113832 A EP91113832 A EP 91113832A EP 91113832 A EP91113832 A EP 91113832A EP 0473036 B1 EP0473036 B1 EP 0473036B1
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EP
European Patent Office
Prior art keywords
wire
bending
carrier
machine according
bending machine
Prior art date
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Expired - Lifetime
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EP91113832A
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German (de)
French (fr)
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EP0473036A2 (en
EP0473036A3 (en
Inventor
Rob Van Hoorn
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ABB BV
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Bv Hollandse Apparatenfabriek Haf
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Publication of EP0473036A2 publication Critical patent/EP0473036A2/en
Publication of EP0473036A3 publication Critical patent/EP0473036A3/en
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Publication of EP0473036B1 publication Critical patent/EP0473036B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26

Definitions

  • the invention relates to a wire bending machine according to the preamble of claim 1, see document EP-A-0 274 240.
  • Wiring in electrical engineering devices often requires insulated wires made of solid material, which are cut to a certain length and bent into a certain shape, the ends of the bent wires must be stripped so that the pieces of wire can be reworked at the appropriate locations in the device without rework can be inserted and connected in an electrically conductive manner.
  • pieces of wire of a certain length were cut from an endless wire, stripped of insulation and bent into the appropriate shape using a bending machine.
  • the bending machine contained two jaws that could be moved towards each other, between which the wire to be bent was manually inserted has been; the jaws were in the shape that the wire should be bent, such as an L-shape and the like. The bending process was triggered manually each time.
  • a wire bending machine in which the bending process for wire pieces is essentially automatic is known.
  • This wire bending machine has a wire feed station which has two pairs of opposing rollers between which the wire is conveyed; it has a bending station by means of which the wire is bent, a stripping station and a cutting station.
  • the bending station has suitably associated jaws of a desired shape, similar to the jaw shape of the device described above. However, this means that only one bending shape can be produced; if the wire is to be bent into another bending shape, the jaws of the bending station must be replaced.
  • the object of the invention is to provide a wire bending machine of the type mentioned, in which wire with different thicknesses can be bent in any shape with any wire length without exchanging elements and components.
  • the bending station has a support which can be rotated about the longitudinal axis of the wire and on which is mounted a bending pin which can be rotated eccentrically about an axis running perpendicular thereto. If the eccentrically arranged bending pin is rotated about its axis of rotation, then the wire protruding from the carrier can pass through the Pins are bent, the bending direction depends on the angular position of the support and thus the axis of rotation of the bending pin. This allows the bends to be bent in different directions so that any bending shape can be achieved.
  • the carrier and the bending pin carrier to which the bending pin is attached can expediently be set in rotation about their own axis independently of one another.
  • a motor for rotating the bending pin carrier can be fastened
  • the carrier can have a cylinder section and a bearing block attached to it with a cylindrical bore in which the axis of rotation of the bending pin carrier is rotatably mounted.
  • the cylinder section of the carrier comprises a drive shaft (also called a drive pin) with a central through-bore for receiving the wire, with rotary bearings being provided between the cylinder section and the drive pin or the drive shaft.
  • the drive shaft preferably has a bevel gear, which meshes with the bending pin carrier, which is also designed as a bevel gear.
  • the carrier can be controlled together with the drive pin and the bending pin carrier in such a way that the plane of rotation or rather the rotary cylinder described by the bending pin with its or its central axis each Take any angular position in relation to the central axis of the wire fed can. Accordingly, the wire can be bent in any direction.
  • a motor is attached to the support for driving the bending pin support; here, however, since when the carrier is rotated, the motor also rotates, so that a high output is required for driving the carrier because of the weight of the motor for the turntable.
  • the drive motor for the carrier is considerably lighter and simpler to design than the version with its own motor for the bending pin carrier.
  • two drive motors are provided which drive the drive pin and the carrier preferably by means of a toothed belt drive.
  • two pairs of rollers are provided, each having a driven and a loosely rotating wheel, which promote the connection of the wire between them by friction.
  • At least one stripping station is then provided in the intermediate area, ie in the area between the two pairs of rollers.
  • the pressure of the pair of rollers at the front in the conveying direction on the wire located between them is greater than that of the rear pair of rollers, so that the wire area between the pairs of rollers is stretched.
  • This can be achieved in that the diameter of at least one of the wheels of the pair of rollers at the front in the wire conveying direction is larger than that of the rollers of the other pair of rollers, which increases the surface pressure between the rollers of the front pair of rollers and also the peripheral speed of the rollers is greater, whereby the wire is pulled and the wire is tensioned.
  • the idler, idler rollers of each pair of rollers can be lifted off the other roller. This prevents the wire from being threaded between the pairs of rollers in the direction of its longitudinal axis. The wire can then simply be inserted laterally.
  • each of the stripping stations is responsible for one wire diameter.
  • each stripping station can advantageously be chosen so that the stripping station has an anvil on which the wire rests, the contact surface (anvil surface) in the direction transverse to the conveying direction of the wire corresponds approximately to the diameter of the core of the wire, that a relative to that Anvil U-shaped cutting element displaceable perpendicular to the conveying direction is provided, the leg ends of which are provided with cutting edges, and that the spacing of the legs corresponds to the width of the anvil surface and thus approximately the thickness of the core of the wire, so that insulating sections are moved by moving the cutting element over the anvil cut off on the insulation of the wire.
  • the front and rear of the anvil or the cutting element are connected in such a way that vertical cutting knives are connected so that the insulation of the wire in front of and behind the anvil or the cutting element is cut off from above and from below.
  • the entire wire bending device is of course only suitable for wire made of solid material.
  • the entire bending device is controlled electronically by means of a program control.
  • the program contains the device data, the number and the distance of the stripping device, the distance of the bending head and the distance of the cutting device (scissors) from a reference point. This reference point is preferably the bending point.
  • the following data is entered into the program control: diameter of the wire, length of the wire between the bending point and the cutting length, bending direction, number of bent wire pieces, stripping length.
  • the computer calculates the stripping point, the required feed and the angle of rotation of the stepper motors, whereby the bending radius is taken into account when dimensioning the cutting length depending on the wire thickness.
  • the stripping station corresponding to the wire diameter is always activated.
  • the bending device according to FIG. 1 has a base frame 10, which consists of two spaced apart feet 11 and 12 made of U-shaped profile material, one cross bar 13 and 14 arranged at the upper end of each foot 11 and 12, and two on the cross bars 13 and 14 attached horizontal support tubes 15 and 16 is formed.
  • a plurality of clamping devices 17, 18, 19, 20, 21 and 22 are fastened between the support tubes 15 and 16 (and a clamping device 17 to 22 is fastened on each support tube 15 and 16, which clamping devices 17 to 22 for fixing and holding) the individual components of the bending device on the support tubes 15 and 16).
  • the clamping devices 17 to 22 are slidably fastened on the support tubes 15 and 16 in the direction of the support tubes 15 and 16.
  • a support plate 23 and 24 are attached, on each of which two bearing blocks 25 and 26, 251 / 261 and 252 / 262 are screwed.
  • the two bearing blocks 25 and 26 each have a distance between them and are penetrated by a drive shaft 27 and 28, respectively. Both drive shafts extend transversely to the longitudinal extent of the carrier tubes 15 and 16, respectively.
  • a roller wheel 29 and 30 On both drive shafts 27 and 28 between the two bearing blocks 25 and 26 there is a roller wheel 29 and 30, the roller wheel 29 located on the left in the drawing FIG. 1 by means of a drive motor 31 is driven.
  • gears 32 and 33 At the free end of the drive shafts 27 and 28 there are gears 32 and 33, which are wrapped together by a toothed belt, so that this results in a toothed belt drive through which the gear 33 is driven with the roller 30.
  • a loosely running roller 35 and 36 interacts with the rollers 29 and 30, which two rollers 35 and 36 are each pressed against the lower rollers 29 and 30 by means of a spring arrangement 37 and 38.
  • the two spring arrangements 37 and 38 are the same, so that only the spring arrangement facing the viewer is to be described.
  • a support frame 39 is fastened on the support plate 23 and is formed from a base plate 40, two transverse side plates 41 and 42 and a transverse support wall 44 provided with a recess 43.
  • the base plate 40 lies on the support plate 23 and is fastened to it.
  • the two side walls 41 and 42 run perpendicular to the base plate 40 and transversely to the longitudinal extension of the two support tubes and the support wall 44 extends perpendicular to the base plate 40, perpendicular to the side walls 41 and 42 and parallel to the longitudinal extension of the support tubes.
  • the drive motor 31 is fastened, and the end of the drive shaft 27 on the drive motor side passes through the support wall 44 at the bore 43.
  • a bore 45 is provided on the upper end of the side walls 41 and 42 opposite the base plate 40, only the bore of the side wall 41 is visible.
  • the bore 45 is penetrated by an axis of rotation 46 and serves to support a triangular holder 47, on the tip of which the roller 35 is mounted.
  • a bolt 48 is attached, at the free end of a cross plate 49 is attached.
  • a compression spring 51 which presses the bridge member 50 and thus the triangular support 47 down, that is, against the bearing block 25 1 and thus the roller 35 against the roller 29.
  • a pivot lever 52 is rotatably supported, which rests with its tip on the upper surface of the bearing block 25 1.
  • the triangular support can be raised, so that the roller 35 is raised and a wire to be fed (not shown). are inserted laterally across the roller plane between the rollers.
  • roller 36 can also be lifted off the roller 30 by means of a pivoting lever 522.
  • the diameter of the roller 30 is slightly larger than the diameter of the roller 29, so that the pressure between the rollers 30, 36 on the wire is greater than the pressure between the rollers 35 and 29.
  • the peripheral speed of the roller 30 is greater than that Roll 29, which is why the wire between the two pairs of rollers 35/29 and 36/30 is stretched.
  • each of the stripping devices 53, 54 and 55 has a fixed anvil 56, on each of which a cutting knife 57 and 58 is arranged in the conveying direction of the wire, which cutting knives 57, 58 have the upper anvil surface 59 protrude according to the thickness of the insulation of the wire to be stripped.
  • a semi-circular recess 60 or 61 corresponding to the thickness of the wire insulation is provided on the cutting knife 57 or 58 at its upper edge.
  • the fixed anvil 56 interacts with a cutting element 62 which can be displaced in the vertical direction.
  • the cutting element 62 is U-shaped and accordingly has two legs 63 and 64, the clearance between which corresponds to the thickness of the fixed anvil transverse to the conveying direction.
  • the ends of the legs 63 and 64 are sharpened by a bevel 65 and 66 and thus have cutting edges 67 and 68.
  • Connected to the cutting element 62 are upper cutting knives 69 and 70, which correspond to the lower cutting knives, correspondingly project beyond the cutting edges 67 and 68 and also have a recess 71, only the front recess 71 being visible in FIG. 4.
  • Figure 5 shows the effect of the stripping station.
  • a wire 72 with a wire core 73 and an insulation 74 enveloping it.
  • the cutting edges 67 and 68 cut off the insulation regions which protrude beyond the side surfaces of the anvil 56; the cut-off partial areas 75, 76 of the insulation 64 are in the form of a segment of a circle and are shown in FIG.
  • the insulation 74 is cut in the vertical direction by the front and rear cutting knives 57, 58, 69, 70 and when the wire 72 is conveyed further, the upper and lower insulating masses 77 and 78 which are still located between the legs 63 and 64 fall in FIG out.
  • the wire is stripped.
  • a bearing block 90 on which a bending head 91 is supported, is fastened to the clamping device 22, which lies at the front in the conveying direction. Reference is made to this in FIG. 2.
  • the bearing block 91a can be seen schematically, which has a cylindrical longitudinal bore 92, in which the cylindrical section 93 of a carrier 94 is rotatably supported by means of bearing elements 95, preferably ball bearings.
  • the cylindrical section 93 is likewise provided with a cylindrical bore 96, in the interior of which a drive shaft or a drive pin 99, which is mounted with a through bore 98, is received by means of bearing elements 97.
  • the drive pin has a bevel gear 100.
  • the drive pin 99 has a gear 101 which is coupled via a toothed belt drive 102 to the pinion 103 of a fixedly mounted drive motor 104.
  • the drive motor 104 can be seen in FIG. 1 on the right-hand side in the conveying direction of the wire.
  • the cylindrical section 93 is also connected at its rear end in the conveying direction by means of a toothed belt drive 105 to a drive motor 106, which drive motor 106 is located on the left side of the device (see FIG. 1).
  • the carrier 94 has an eccentric projection 107, in which a receiving bore 108 running transversely to the conveying direction of the wire is made, in which a pin 110 is supported by means of bearing elements 109, on the axis of the conveying axis of the wire, which is denoted by MM in FIG. 2 , facing end, a rotating plate 111 serving as a bending pin carrier is attached, on which a bending pin 112 is attached eccentrically to the central axis of the pin 110.
  • This bending pin 112 rotates about the central axis of the pin 110 and in this way describes a hollow cylinder which is penetrated by the central axis of the conveying direction of the wire is, so that when the wire protrudes from the through hole 98, the bending pin 112 can bend the wire when it is driven by the turntable 111 on its cylindrical arc.
  • the turntable 111 is also designed as a bevel gear and meshes with the bevel gear 100.
  • the drive pin 99 is driven by means of the motor 104, as a result of which the bevel gear 100 and thus also the bevel gear 111 rotate. If the bending direction is to change, both motors 104 and 106 are driven. And because the peripheral speeds of the bevel gears 100 and 111 are the same, the pin 112 remains in its angular position in relation to the pin 110.
  • the motor 106 probably causes the projection 107 to rotate, but the bending pin 112 does not rotate about its axis.
  • the rotary movement of the pin 112 about the central axis of the pin 110 can also be measured by a rotary transducer on the motor 104, so that no right angles are bent, but angles between 0 and 90 °. Of course, such a rotary transducer can also be arranged on the motor 106 in order to be able to adjust the angular position of the carrier.
  • FIG. 2 is implemented in the machine according to FIG. 1.
  • FIG. 3 shows a further embodiment of the invention.
  • a carrier 114 in the form of a hollow cylindrical shaft is mounted in the bearing block 91a.
  • the rear end, seen in the conveying direction, on the left in FIG. 3, is provided with a toothed wheel 115, which is coupled via a toothed belt 116 to a pinion 117 of a drive motor 118.
  • a drive motor 122 is attached, the longitudinal axis of which is oriented transversely to the line M-M.
  • the motor pin 123 passing through the leg 121 carries a turntable 124, to which a bending pin 125 is fastened.
  • the mode of operation is the same as that of the device according to FIG. 2, only the motor 104 as the motor 122 being attached directly to the carrier head via the L-shaped holder 119. Due to the weight ratios of the motor 122, the arrangement according to FIG. 3 is not quite as optimal as that according to FIG. 2.
  • FIG. 6 shows a roller arrangement or a pair of rollers with a driven roller 29 and a loose idler roller 35.
  • the idler idler roller 35 has a V-shaped cutout 126 on the circumference, so that the wire 72 is pressed at three points, as by arrows P1, P2 and P3 are shown.
  • the drive motors 104, 106; 118 and 120 are stepper motors that can be rotated into certain angular positions of their drive pins.
  • the cutting element 62 is pulled down by means of a piston-cylinder arrangement 79, 80, 81.
  • the cutting element 62 can also be arranged in a stationary manner and the anvil 56 can be moved upwards. Under certain control circumstances, both can also be moved against one another by means of suitable mechanics.
  • the central bore 98 through the drive pin 99 must of course be shaped accordingly in the area in which the bending pin 112 is located. Accordingly, it has a constriction (not shown in FIG. 2) at the front end located in the conveying direction, the inside diameter of which corresponds to the largest wire diameter, and at the transition from the inner wall of this constriction to the outer end face of the drive pin, which in FIG Bevel gear 100, a circular transition is provided, through which a bending radius is formed.
  • a constriction not shown in FIG. 2
  • the funnel opening of which corresponds to the required bending radius there is a kind of funnel.
  • the bending device or bending machine is controlled electronically by means of a program control, the program control controlling the electric motors for bending and advancing the wire, as well as electromagnetic valves for actuating the piston-cylinder arrangement 79, 80 and 81.

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Description

Die Erfindung betrifft eine Drahtbiegemaschine gemäß dem Oberbegriff des Anspruches 1, siehe Dokument EP-A- 0 274 240.The invention relates to a wire bending machine according to the preamble of claim 1, see document EP-A-0 274 240.

Zur Verdrahtung in elektrotechnischen Geräten sind oft isolierte Drähte aus Vollmaterial erforderlich, die auf eine bestimmte Länge abgelängt und in eine bestimmte Form gebogen sind, wobei die Enden der gebogenen Drähte abisoliert sein müssen, damit die Drahtstücke ohne Nacharbeit an die entsprechenden Stellen in dem betreffenden Gerät einfügbar und darin elektrisch leitend anschließbar sind.Wiring in electrical engineering devices often requires insulated wires made of solid material, which are cut to a certain length and bent into a certain shape, the ends of the bent wires must be stripped so that the pieces of wire can be reworked at the appropriate locations in the device without rework can be inserted and connected in an electrically conductive manner.

Dazu wurden von einem Endlosdraht Drahtstücke bestimmter Länge abgeschnitten, entisoliert und mittels einer Biegemaschine in die entsprechende Form gebogen. Die Biegemaschine enthielt zwei aufeinanderzu bewegbare Backen, zwischen die der zu biegende Draht manuell eingelegt wurde; die Backen besaßen die Form, die der Draht im gebogenen Zustand erhalten sollte, beispielsweise die Form eines L-Stückes und dergleichen. Der Biegevorgang wurde jedesmal manuell ausgelöst.For this purpose, pieces of wire of a certain length were cut from an endless wire, stripped of insulation and bent into the appropriate shape using a bending machine. The bending machine contained two jaws that could be moved towards each other, between which the wire to be bent was manually inserted has been; the jaws were in the shape that the wire should be bent, such as an L-shape and the like. The bending process was triggered manually each time.

Eine Drahtbiegemaschine, bei der das Biegeverfahren für Drahtstücke im wesentlichen automatisch abläuft, ist bekannt. Diese Drahtbiegemaschine besitzt eine Drahtzuführstation, die zwei Paar gegeneinanderlaufende Rollen aufweist, zwischen denen der Draht gefördert wird; sie besitzt eine Biegestation, mittels der der Draht gebogen wird, eine Entisolierstation und eine Abschneidestation. Die Biegestation besitzt geeignet einander zugeordnete Backen einer gewünschten Form, ähnlich wie die Backenform der oben beschriebenen Einrichtung. Dies bedeutet allerdings, daß immer lediglich nur eine Biegeform hergestellt werden kann; wenn der Draht in eine andere Biegeform gebogen werden soll, müssen die Backen der Biegestation ausgetauscht werden.A wire bending machine in which the bending process for wire pieces is essentially automatic is known. This wire bending machine has a wire feed station which has two pairs of opposing rollers between which the wire is conveyed; it has a bending station by means of which the wire is bent, a stripping station and a cutting station. The bending station has suitably associated jaws of a desired shape, similar to the jaw shape of the device described above. However, this means that only one bending shape can be produced; if the wire is to be bent into another bending shape, the jaws of the bending station must be replaced.

Aufgabe der Erfindung ist es, eine Drahtbiegemaschine der eingangs genannten Art zu schaffen, bei der ohne Austausch von Elementen und Komponenten Draht mit unterschiedlichen Dicken in beliebige Form bei beliebiger Drahtlänge gebogen werden kann.The object of the invention is to provide a wire bending machine of the type mentioned, in which wire with different thicknesses can be bent in any shape with any wire length without exchanging elements and components.

Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruches 1.This object is achieved according to the invention by the characterizing features of claim 1.

Die Biegestation besitzt erfindungsgemäß einen um die Drahtlängsachse drehbaren Träger, an dem ein um eine senkrecht dazu verlaufende Achse exzentrisch drehbarer Biegezapfen gelagert ist. Wenn der exzentrisch angeordnete Biegezapfen um seine Drehachse verdreht wird, dann kann der aus dem Träger herausragende Draht durch den Zapfen gebogen werden, wobei die Biegerichtung abhängig ist von der winkligen Lage des Trägers und damit der Drehachse des Biegezapfens. Damit können die Abwinkelungen in verschiedene Richtung abgebogen werden, so daß eine beliebige Biegeform erreicht werden kann.According to the invention, the bending station has a support which can be rotated about the longitudinal axis of the wire and on which is mounted a bending pin which can be rotated eccentrically about an axis running perpendicular thereto. If the eccentrically arranged bending pin is rotated about its axis of rotation, then the wire protruding from the carrier can pass through the Pins are bent, the bending direction depends on the angular position of the support and thus the axis of rotation of the bending pin. This allows the bends to be bent in different directions so that any bending shape can be achieved.

In zweckmäßiger Weise sind der Träger und der Biegezapfenträger, an dem der Biegezapfen angebracht ist, unabhängig voneinander jeweils um ihre eigene Achse in Drehung versetzbar.The carrier and the bending pin carrier to which the bending pin is attached can expediently be set in rotation about their own axis independently of one another.

Dabei bestehen zwei Möglichkeiten: zum einen kann am Träger ein Motor zur Drehung des Biegezapfenträgers befestigt sein, und zum anderen kann der Träger einen Zylinderabschnitt und einen daran angebrachten Lagerbock mit einer zylindrischen Bohrung aufweisen, in der die Drehachse des Biegezapfenträgers drehbar gelagert ist.There are two options: on the one hand, a motor for rotating the bending pin carrier can be fastened, and on the other hand, the carrier can have a cylinder section and a bearing block attached to it with a cylindrical bore in which the axis of rotation of the bending pin carrier is rotatably mounted.

In besonders vorteilhafter Ausgestaltung gemäß der zweiten Möglichkeit der Erfindung umfaßt der Zylinderabschnitt des Trägers eine Antriebswelle (auch Antriebszapfen genannt) mit einer zentralen Durchgangsbohrung zur Aufnahme des Drahtes, wobei zwischen dem Zylinderabschnitt und dem Antriebszapfen oder der Antriebswelle Drehlager vorgesehen sind. Die Antriebswelle besitzt in bevorzugter Weise ein Kegelzahnrad, welches mit dem ebenfalls als Kegelzahnrad ausgebildeten Biegezapfenträger kämmt. Wenn man nun den Träger einerseits und den Antriebszapfen andererseits von unterschiedlichen Motoren in geeigneter Weise ansteuert, dann kann der Träger zusammen mit dem Antriebszapfen und dem Biegezapfenträger so gesteuert werden, daß die Dreheebene oder besser der vom Biegezapfen beschriebene Drehzylinder mit ihrer bzw. seiner Mittelachse jede beliebige Winkelstellung bezogen auf die Mittelachse des zugeführten Drahtes einnehmen kann. Demgemäß kann der Draht in jede beliebige Richtung gebogen werden. Dies ist auch dann möglich, wenn am Träger ein Motor zum eigenen Antrieb des Biegezapfenträgers befestigt ist; hier allerdings wird, da dann, wenn der Träger gedreht wird, sich auch der Motor mitdrehen, so daß für den Antrieb des Trägers wegen des Gewichtes des Motors für den Drehteller eine hohe Leistung erforderlich wird. Mit der Ausführung, bei der der Biegezapfenträger am Träger drehbar gelagert ist und mit dem Antriebszapfen mittels der Kegelzahnradanordnung drehbar gekuppelt wird, ist der Antriebsmotor für den Träger gegenüber der Ausführung mit dem eigenen Motor für den Biegezapfenträger erheblich leichter und einfacher auszubilden.In a particularly advantageous embodiment according to the second possibility of the invention, the cylinder section of the carrier comprises a drive shaft (also called a drive pin) with a central through-bore for receiving the wire, with rotary bearings being provided between the cylinder section and the drive pin or the drive shaft. The drive shaft preferably has a bevel gear, which meshes with the bending pin carrier, which is also designed as a bevel gear. If you now control the carrier on the one hand and the drive pin on the other hand in a suitable manner by different motors, then the carrier can be controlled together with the drive pin and the bending pin carrier in such a way that the plane of rotation or rather the rotary cylinder described by the bending pin with its or its central axis each Take any angular position in relation to the central axis of the wire fed can. Accordingly, the wire can be bent in any direction. This is also possible if a motor is attached to the support for driving the bending pin support; here, however, since when the carrier is rotated, the motor also rotates, so that a high output is required for driving the carrier because of the weight of the motor for the turntable. With the version in which the bending pin carrier is rotatably mounted on the carrier and is rotatably coupled to the drive pin by means of the bevel gear arrangement, the drive motor for the carrier is considerably lighter and simpler to design than the version with its own motor for the bending pin carrier.

Im letzteren Falle sind zwei Antriebsmotoren vorgesehen, die den Antriebszapfen und den Träger vorzugsweise mittels eines Zahnriementriebes antreiben.In the latter case, two drive motors are provided which drive the drive pin and the carrier preferably by means of a toothed belt drive.

Zum Antrieb des Drahtes, also zu dessen Vorschub, sind zwei Rollenpaare vorgesehen, die je ein angetriebenes und ein lose mitlaufendes Rad aufweisen, die den Drahtschluß zwischen sich durch Reibschluß fördern. In deren Zwischenbereich, also in dem Bereich zwischen den beiden Rollenpaaren ist dann wenigstens eine Entisolierstation vorgesehen.To drive the wire, that is to say to advance it, two pairs of rollers are provided, each having a driven and a loosely rotating wheel, which promote the connection of the wire between them by friction. At least one stripping station is then provided in the intermediate area, ie in the area between the two pairs of rollers.

Damit eine optimale Spannung bei der Drahtförderung im Draht herrscht, ist der Druck des in Förderrichtung vorne befindlichen Rollenpaares auf den dazwischen befindlichen Draht größer als der des hinteren Rollenpaares, so daß der Drahtbereich zwischen den Rollenpaaren gespannt ist. Dies kann dadurch erreicht werden, daß der Durchmesser wenigstens eines der Räder des in Drahtförderrichtung vorne liegenden Rollenpaares größer ist als der der Rollen des anderen Rollenpaares, wodurch die Flächenpressung zwischen den Rollen des vorderen Rollenpaares erhöht ist und auch die Umfangsgeschwindigkeit der Rollen größer ist, wodurch an dem Draht gezogen und der Draht gespannt wird.In order for there to be an optimal tension when the wire is being conveyed in the wire, the pressure of the pair of rollers at the front in the conveying direction on the wire located between them is greater than that of the rear pair of rollers, so that the wire area between the pairs of rollers is stretched. This can be achieved in that the diameter of at least one of the wheels of the pair of rollers at the front in the wire conveying direction is larger than that of the rollers of the other pair of rollers, which increases the surface pressure between the rollers of the front pair of rollers and also the peripheral speed of the rollers is greater, whereby the wire is pulled and the wire is tensioned.

In weiterer Ausgestaltung der Erfindung sind die lose mitlaufenden, nicht angetriebenen Rollen jedes Rollenpaares von der anderen Rolle abhebbar. Dadurch wird vermieden, daß der Draht in Richtung seiner Längsachse zwischen die Rollenpaare einzufädeln ist. Der Draht kann dann einfach seitlich eingelegt werden.In a further embodiment of the invention, the idler, idler rollers of each pair of rollers can be lifted off the other roller. This prevents the wire from being threaded between the pairs of rollers in the direction of its longitudinal axis. The wire can then simply be inserted laterally.

In dem Bereich zwischen den Rollenpaaren befinden sich in bevorzugter Weise mehrere Entisolierstationen, die Drähte unterschiedlichen Durchmessers entisolieren können. Dabei ist jede der Entisolierstationen für jeweils einen Drahtdurchmesser zuständig.In the area between the pairs of rollers there are preferably a plurality of stripping stations which can stripping wires of different diameters. Each of the stripping stations is responsible for one wire diameter.

Der Aufbau jeder Entisolierstation kann vorteilhaft so gewählt sein, daß die Entisolierstation einen Amboß aufweist, auf dem der Draht aufliegt, wobei die Aufliegefläche (Amboßfläche) in Richtung quer zur Förderrichtung des Drahtes etwa dem Durchmesser der Seele des Drahtes entspricht, daß ein relativ zu dem Amboß senkrecht zur Förderrichtung verschiebbares U-förmiges Schneidelement vorgesehen ist, dessen Schenkelenden mit Schneidkanten versehen sind, und daß der Abstand der Schenkel der Breite der Amboßfläche und damit etwa der Dicke der Seele des Drahtes entspricht, so daß durch Bewegung des Schneideelementes über den Amboß Isolierabschnitte an der Isolierung des Drahtes abgeschnitten werden.The structure of each stripping station can advantageously be chosen so that the stripping station has an anvil on which the wire rests, the contact surface (anvil surface) in the direction transverse to the conveying direction of the wire corresponds approximately to the diameter of the core of the wire, that a relative to that Anvil U-shaped cutting element displaceable perpendicular to the conveying direction is provided, the leg ends of which are provided with cutting edges, and that the spacing of the legs corresponds to the width of the anvil surface and thus approximately the thickness of the core of the wire, so that insulating sections are moved by moving the cutting element over the anvil cut off on the insulation of the wire.

Dabei sind in Drahtförderrichtung gesehen, stirnseitig vor und hinter hinter dem Amboß bzw. dem Schneidelement jeweils damit verbundene senkrecht verlaufende Schneidmesser so vorgesehen, daß die Isolierung des Drahtes vor und hinter dem Amboß bzw. des Schneidelementes von oben und von unten abgetrennt wird.Seen in the wire conveying direction, the front and rear of the anvil or the cutting element are connected in such a way that vertical cutting knives are connected so that the insulation of the wire in front of and behind the anvil or the cutting element is cut off from above and from below.

Weitere Ausgestaltungen der Erfindung sind den weiteren Unteransprüchen zu entnehmen.Further refinements of the invention can be found in the further subclaims.

Die gesamte Biegevorrichtung für Draht ist natürlich nur geeignet für Draht aus Vollmaterial. Die gesamte Biegevorrichtung wird elektronisch mittels einer Programmsteuerung angesteuert. Im Programm sind die Vorrichtungsdaten, die Nummer und der Abstand der Abisoliervorrichtung vorhanden, der Abstand des Biegekopfes und der Abstand der Abschneideeinrichtung (Schere) von einem Referenzpunkt. Dieser Referenzpunkt ist in bevorzugter Weise der Biegepunkt. Zur Durchführung des Biegevorganges werden in die Programmsteuerung folgende Daten eingegeben: Durchmesser des Drahtes, Länges des Drahtes zwischen Biegepunkt und Abschneidelänge, Biegerichtung, Anzahl der gebogenen Drahtstücke, Abisolierlänge. Hieraus errechnet sich der Rechner die Abisolierstelle, den erforderlichen Vorschub sowie den Drehwinkel der Schrittmotoren, wobei bei der Bemessung der Abschneidelänge der Biegeradius je nach Drahtdicke berücksichtigt wird. Weiterhin wird immer die dem Drahtdurchmesser entsprechende Abisolierstation angesteuert.The entire wire bending device is of course only suitable for wire made of solid material. The entire bending device is controlled electronically by means of a program control. The program contains the device data, the number and the distance of the stripping device, the distance of the bending head and the distance of the cutting device (scissors) from a reference point. This reference point is preferably the bending point. To carry out the bending process, the following data is entered into the program control: diameter of the wire, length of the wire between the bending point and the cutting length, bending direction, number of bent wire pieces, stripping length. From this, the computer calculates the stripping point, the required feed and the angle of rotation of the stepper motors, whereby the bending radius is taken into account when dimensioning the cutting length depending on the wire thickness. Furthermore, the stripping station corresponding to the wire diameter is always activated.

Anhand der Zeichnung, in der zwei Ausführungsbeispiele der Erfindung dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen und weitere Vorteile näher erläutert und beschrieben werden.The invention, further advantageous refinements and improvements and further advantages are to be explained and described in more detail with reference to the drawing, in which two exemplary embodiments of the invention are shown.

Es zeigen:

Figur 1
eine perspektivische Ansicht einer erfindungsgemäßen Biegevorrichtung,
Figur 2
eine Schnittansicht durch eine erste Ausführungsform des Biegekopfes für die Maschine gemäß Figur 1,
Figur 3
eine weitere Ausführungsform des Biegekopfes für eine Biegevorrichtung nach Figur 1,
Figur 4
eine perspektivische Ansicht einer Abisolierstation, in schematischer Darstellung,
Figur 5
eine Schnittansicht durch die Abisolierstation gemäß Figur 4, nach dem Abisoliervorgang und
Figur 6
eine Aufsicht auf ein Rollenpaar, mit geschnittenem Draht.
Show it:
Figure 1
2 shows a perspective view of a bending device according to the invention,
Figure 2
2 shows a sectional view through a first embodiment of the bending head for the machine according to FIG. 1,
Figure 3
1 shows another embodiment of the bending head for a bending device according to FIG. 1,
Figure 4
1 shows a perspective view of a stripping station, in a schematic illustration,
Figure 5
a sectional view through the stripping station according to Figure 4, after the stripping process and
Figure 6
a top view of a pair of rollers, with cut wire.

Die Biegevorrichtung gemäß Figur 1 besitzt ein Grundgestell 10, welches aus zwei in Abstand zueinander angeordneten Füßen 11 und 12 aus U-förmigem Profilmaterial je eine am oberen Ende jedes Fußes 11 bzw. 12 angeordnete Quertraverse 13 und 14 und zwei an den Quertraversen 13 und 14 befestigten horizontalen Trägerrohren 15 und 16 gebildet ist. Zwischen den Trägerrohren 15 und 16 und an diesen befestigt sind mehrere Klemmvorrichtungen 17, 18, 19, 20, 21 und 22 (wobei auf jedem Trägerrohr 15 und 16 jeweils eine Klemmvorrichtung 17 bis 22 befestigt ist, welche Klemmvorrichtungen 17 bis 22 zur Fixierung und Halterung der einzelnen Komponenten der Biegevorrichtung an den Trägerrohren 15 und 16 dienen). Die Klemmvorrichtungen 17 bis 22 sind dabei auf den Trägerrohren 15 und 16 in der Richtung der Trägerrohre 15 und 16 verschiebbar befestigbar.The bending device according to FIG. 1 has a base frame 10, which consists of two spaced apart feet 11 and 12 made of U-shaped profile material, one cross bar 13 and 14 arranged at the upper end of each foot 11 and 12, and two on the cross bars 13 and 14 attached horizontal support tubes 15 and 16 is formed. A plurality of clamping devices 17, 18, 19, 20, 21 and 22 are fastened between the support tubes 15 and 16 (and a clamping device 17 to 22 is fastened on each support tube 15 and 16, which clamping devices 17 to 22 for fixing and holding) the individual components of the bending device on the support tubes 15 and 16). The clamping devices 17 to 22 are slidably fastened on the support tubes 15 and 16 in the direction of the support tubes 15 and 16.

Auf den Klemmvorrichtungen 17 und 21 sind je eine Tragplatte 23 und 24 befestigt, auf denen je zwei Lagerböcke 25 und 26, 25₁/26₁ und 25₂/26₂ festgeschraubt sind. Die beiden Lagerböcke 25 und 26 haben jeweils einen Abstand zwischen sich und sind von einer Antriebswelle 27 bzw. 28 durchgriffen. Beide Antriebswellen verlaufen quer zu der Längserstreckung der Trägerrohre 15 bzw. 16. Auf beiden Antriebswellen 27 und 28 zwischen den beiden Lagerböcken 25 und 26 befindet sich ein Rollenrad 29 und 30, wobei das in der Zeichnung Figur 1 links befindliche Rollenrad 29 mittels eines Antriebsmotores 31 angetrieben ist. Am freien Ende der Antriebswellen 27 und 28 befinden sich Zahnräder 32 und 33, die miteinander von einem Zahnriemen umschlungen sind, so daß sich hierdurch ein Zahnriementrieb ergibt, durch welchen das Zahnrad 33 mit der Rolle 30 mit angetrieben wird.On the clamping devices 17 and 21, a support plate 23 and 24 are attached, on each of which two bearing blocks 25 and 26, 25₁ / 26₁ and 25₂ / 26₂ are screwed. The two bearing blocks 25 and 26 each have a distance between them and are penetrated by a drive shaft 27 and 28, respectively. Both drive shafts extend transversely to the longitudinal extent of the carrier tubes 15 and 16, respectively. On both drive shafts 27 and 28 between the two bearing blocks 25 and 26 there is a roller wheel 29 and 30, the roller wheel 29 located on the left in the drawing FIG. 1 by means of a drive motor 31 is driven. At the free end of the drive shafts 27 and 28 there are gears 32 and 33, which are wrapped together by a toothed belt, so that this results in a toothed belt drive through which the gear 33 is driven with the roller 30.

Mit den Rollen 29 und 30 wirkt jeweils eine lose mitlaufende Rolle 35 und 36 zusammen, welche beiden Rollen 35 und 36 jeweils mittels einer Federanordnung 37 und 38 gegen die unteren Rollen 29 und 30 gedrückt sind. Die beiden Federanordnungen 37 und 38 sind gleich, so daß lediglich die dem Beschauer zugewandte Federanordnung beschrieben werden soll. Auf der Tragplatte 23 ist ein Haltegestell 39 befestigt, welches aus einer Grundplatte 40, zwei quer dazu verlaufende Seitenplatten 41 und 42 sowie einer quer dazu verlaufenden, mit einer Ausnehmung 43 versehenen Tragwand 44 gebildet ist. Die Grundplatte 40 liegt auf der Tragplatte 23 auf und ist an dieser befestigt. Die beiden Seitenwände 41 und 42 verlaufen senkrecht zur Grundplatte 40 und quer zur Längserstrekkung der beiden Trägerrohre und die Trägerwand 44 verläuft senkrecht zur Grundplatte 40, senkrecht zu den Seitenwänden 41 und 42 und parallel zu der Längserstrekkung der Trägerrohre. An der Außenseite der Trägerwand 44 ist der Antriebsmotor 31 befestigt, und das antriebsmotorseitige Ende der Antriebswelle 27 durchgreift die Trägerwand 44 an der Bohrung 43. An dem der Grundplatte 40 entgegengesetzt liegenden oberen Ende der Seitenwände 41 und 42 ist eine Bohrung 45 vorgesehen, wobei lediglich die Bohrung der Seitenwand 41 sichtbar ist. Die Bohrung 45 wird von einer Drehachse 46 durchgriffen und dient zur Lagerung eines dreieckförmigen Halters 47, an dessen Spitze die Rolle 35 gelagert ist. Auf der Oberfläche des Lagerbockes 25₁ ist ein Bolzen 48 befestigt, an dessen freiem Ende eine Querplatte 49 befestigt ist. Zwischen einem am Dreieckträger 47 angebrachten Brückenelement 50 und der Querplatte 49 befindet sich eine Druckfeder 51, die das Brückenelement 50 und damit den Dreieckträger 47 nach unten, also gegen den Lagerbock 25₁ und damit die Rolle 35 gegen die Rolle 29 drückt. An dem spitzen Ende des Dreieckträgers ist ein Schwenkhebel 52 drehbar gelagert, der mit seiner Spitze auf der oberen Fläche des Lagerbockes 25₁ aufliegt. Durch Verschwenken des Schwenkhebels 52 um seine Drehachse kann - da die Spitze eine Kreisbogenbewegung um die Drehachse des Schwenkhebels und damit um die Drehachse der Rolle 35 ausführt - der Dreiecksträger angehoben werden, so daß die Rolle 35 angehoben wird und ein zuzuführender Draht (nicht gezeigt) seitlich quer zu der Rollenebene zwischen die Rollen eingeführt werden.A loosely running roller 35 and 36 interacts with the rollers 29 and 30, which two rollers 35 and 36 are each pressed against the lower rollers 29 and 30 by means of a spring arrangement 37 and 38. The two spring arrangements 37 and 38 are the same, so that only the spring arrangement facing the viewer is to be described. A support frame 39 is fastened on the support plate 23 and is formed from a base plate 40, two transverse side plates 41 and 42 and a transverse support wall 44 provided with a recess 43. The base plate 40 lies on the support plate 23 and is fastened to it. The two side walls 41 and 42 run perpendicular to the base plate 40 and transversely to the longitudinal extension of the two support tubes and the support wall 44 extends perpendicular to the base plate 40, perpendicular to the side walls 41 and 42 and parallel to the longitudinal extension of the support tubes. On the outside of the support wall 44, the drive motor 31 is fastened, and the end of the drive shaft 27 on the drive motor side passes through the support wall 44 at the bore 43. A bore 45 is provided on the upper end of the side walls 41 and 42 opposite the base plate 40, only the bore of the side wall 41 is visible. The bore 45 is penetrated by an axis of rotation 46 and serves to support a triangular holder 47, on the tip of which the roller 35 is mounted. On the surface of the bearing block 25₁ a bolt 48 is attached, at the free end of a cross plate 49 is attached. Between a triangular support 47 attached to the bridge member 50 and the cross plate 49 is a compression spring 51 which presses the bridge member 50 and thus the triangular support 47 down, that is, against the bearing block 25 1 and thus the roller 35 against the roller 29. At the tip end of the triangular support, a pivot lever 52 is rotatably supported, which rests with its tip on the upper surface of the bearing block 25 1. By pivoting the pivot lever 52 about its axis of rotation, since the tip performs a circular arc movement about the axis of rotation of the pivot lever and thus about the axis of rotation of the roller 35, the triangular support can be raised, so that the roller 35 is raised and a wire to be fed (not shown). are inserted laterally across the roller plane between the rollers.

Die gleiche Ausführung findet sich auch im Bereich der Rolle 36, so daß mittels eines Schwenkhebels 52₂ die Rolle 36 ebenfalls von der Rolle 30 abgehoben werden kann.The same design is also found in the area of the roller 36, so that the roller 36 can also be lifted off the roller 30 by means of a pivoting lever 52₂.

Der Durchmesser der Rolle 30 ist geringfügig größer als der Durchmesser der Rolle 29, so daß die Pressung zwischen den Rollen 30, 36 auf den Draht größer ist als die Pressung zwischen den Rollen 35 und 29. Die Umfangsgeschwindigkeit der Rolle 30 ist größer als die der Rolle 29, weswegen dem Draht zwischen den beiden Rollenpaaren 35/29 und 36/30 gespannt wird.The diameter of the roller 30 is slightly larger than the diameter of the roller 29, so that the pressure between the rollers 30, 36 on the wire is greater than the pressure between the rollers 35 and 29. The peripheral speed of the roller 30 is greater than that Roll 29, which is why the wire between the two pairs of rollers 35/29 and 36/30 is stretched.

Zwischen den beiden Rollenpaaren 35/29 und 36/30 befinden sich drei Entisolierstationen 53, 54 und 55, die auf den Klemmvorrichtungen 18, 19 und 20 befestigt sind.Between the two pairs of rollers 35/29 and 36/30 there are three stripping stations 53, 54 and 55 which are fastened on the clamping devices 18, 19 and 20.

Jede der Entisoliervorrichtungen 53, 54 und 55 besitzt, wie aus Figur 4 ersichtlich ist, einen feststehenden Amboß 56, an dessen in Förderrichtung des Drahtes vorderer und hinterer Seite je ein Schneidemesser 57 und 58 angeordnet ist, welche Schneidemesser 57, 58 die obere Amboßfläche 59 entsprechend der Dicke der Isolierung des zu entisolierenden Drahtes überragen. An dem Schneidemesser 57 bzw. 58 an dessen oberen Kante ist je eine der Dicke der Drahtisolierung entsprechende halbkreisförmige Vertiefung 60 bzw. 61 vorgesehen. Der feststehende Amboß 56 wirkt mit einem in vertikaler Richtung verschiebbaren Schneidelement 62 zusammen. Das Schneidelement 62 ist U-förmig ausgebildet und besitzt demgemäß zwei Schenkel 63 und 64, deren lichter Abstand voneinander der Dicke des feststehenden Ambosses quer zur Förderrichtung entspricht. Die Enden der Schenkel 63 und 64 sind durch eine Abschrägung 65 und 66 angeschärft und besitzen somit Schneidkanten 67 und 68. Mit dem Schneidelement 62 verbunden sind obere Schneidmesser 69 und 70, die den unteren Schneidmessern entsprechen, in entsprechender Weise die Schneidkanten 67 und 68 überragen und ebenfalls eine Vertiefung 71 aufweisen, wobei lediglich die vordere Vertiefung 71 in der Figur 4 sichtbar ist.As can be seen from FIG. 4, each of the stripping devices 53, 54 and 55 has a fixed anvil 56, on each of which a cutting knife 57 and 58 is arranged in the conveying direction of the wire, which cutting knives 57, 58 have the upper anvil surface 59 protrude according to the thickness of the insulation of the wire to be stripped. A semi-circular recess 60 or 61 corresponding to the thickness of the wire insulation is provided on the cutting knife 57 or 58 at its upper edge. The fixed anvil 56 interacts with a cutting element 62 which can be displaced in the vertical direction. The cutting element 62 is U-shaped and accordingly has two legs 63 and 64, the clearance between which corresponds to the thickness of the fixed anvil transverse to the conveying direction. The ends of the legs 63 and 64 are sharpened by a bevel 65 and 66 and thus have cutting edges 67 and 68. Connected to the cutting element 62 are upper cutting knives 69 and 70, which correspond to the lower cutting knives, correspondingly project beyond the cutting edges 67 and 68 and also have a recess 71, only the front recess 71 being visible in FIG. 4.

Die Figur 5 zeigt die Wirkung der Entisolierstation. Auf der oberen Amboßfläche 59 des Ambosses 56 liegt ein Draht 72 mit einer Drahtseele 73 und einer diese umhüllenden Isolierung 74 auf. Wenn sich das Schneidelement 62 aus der in Figur 4 gezeigten Stellung nach unten in Pfeilrichtung P bewegt, dann schneiden die Schneidkanten 67 und 68 die Isolierungsbereiche, die die Seitenflächen des Ambosses 56 überragen, ab; die abgeschnittenen Teilbereiche 75, 76 der Isolierung 64 sind kreissegmentartig und in der Figur 5 links und rechts, gerade abfallend, dargestellt. Durch die vorderen und hinteren Schneidmesser 57, 58, 69, 70 wird die Isolierung 74 in vertikaler Richtung durchschnitten und wenn der Draht 72 weiterbefördert wird, fallen die in der Figur 5 noch zwischen den Schenkeln 63 und 64 befindlichen oberen und unteren Isoliermassen 77 und 78 heraus. Der Draht ist entisoliert. Unter Umständen kann man auch die vorderen und hinteren Schneidmesser 57, 58; 69, 70 in vertikaler Richtung beweglich anordnen. Dann schneidet man die Isolierung bis zu einem Anschlag ab und danach werden die seitlichen Teilbereiche 75 und 76 entfernt.Figure 5 shows the effect of the stripping station. On the upper anvil surface 59 of the anvil 56 there is a wire 72 with a wire core 73 and an insulation 74 enveloping it. When the cutting element 62 moves downward in the direction of arrow P from the position shown in FIG. 4, the cutting edges 67 and 68 cut off the insulation regions which protrude beyond the side surfaces of the anvil 56; the cut-off partial areas 75, 76 of the insulation 64 are in the form of a segment of a circle and are shown in FIG. The insulation 74 is cut in the vertical direction by the front and rear cutting knives 57, 58, 69, 70 and when the wire 72 is conveyed further, the upper and lower insulating masses 77 and 78 which are still located between the legs 63 and 64 fall in FIG out. The wire is stripped. Under certain circumstances, the front and rear cutting knives 57, 58; Arrange 69, 70 movably in the vertical direction. Then you cut off the insulation up to a stop and then the side sections 75 and 76 are removed.

Aus Figur 1 ist ersichtlich, daß die Betätigung des Schneidelementes 62 mittels Kolben-Zylinderanordnungen 79, 80, 81 betätigt ist. Die Kolben-Zylinderanordnungen 79, 80 und 81 sind unten an den Klemmvorrichtungen 18, 19 und 20 befestigt und die Übertragung der Kolben-Zylinderbewegung erfolgt über Verbindungsbolzen 82, 83 und 84, die mit einer oberen Quertraverse 85, 86 und 87 in Verbindung stehen, an denen die Schneidelemente 62 mit den Schneidmessern 69 und 70 angebracht sind. Man erkennt die Schneidelemente 62 von außen, unterhalb denen sich der Schneidamboß 56 befindet.From Figure 1 it can be seen that the actuation of the cutting element 62 is actuated by means of piston-cylinder arrangements 79, 80, 81. The piston-cylinder arrangements 79, 80 and 81 are fastened at the bottom to the clamping devices 18, 19 and 20 and the transmission of the piston-cylinder movement takes place via connecting bolts 82, 83 and 84, which are connected to an upper crossbar 85, 86 and 87, to which the cutting elements 62 with the cutting knives 69 and 70 are attached. The cutting elements 62 can be seen from the outside, below which the cutting anvil 56 is located.

An der Klemmvorrichtung 22, die in Förderrichtung vorne liegt, ist ein Lagerbock 90 befestigt, an dem ein Biegekopf 91 aufgelagert ist. Es sei hierzu Bezug genommen auf die Figur 2. Man erkennt schematisch den Lagerbock 91a, der eine zylindrische Längsbohrung 92 aufweist, in dem der zylindrische Abschnitt 93 eines Trägers 94 mittels Lagerelementen 95, vorzugsweise Kugellager, drehbar gelagert ist. Der zylindrische Abschnitt 93 ist ebenfalls mit einer zylindrischen Bohrung 96 versehen, in deren Innerem mittels Lagerelementen 97 eine mit einer Durchgangsbohrung 98 gelagerte Antriebswelle oder ein Antriebszapfen 99 aufgenommen ist. An dem vorderen Ende besitzt der Antriebszapfen ein Kegelzahnrad 100. Am hinteren Ende besitzt der Antriebszapfen 99 ein Zahnrad 101, welches über einen Zahnriementrieb 102 mit dem Zahnritzel 103 eines ortsfest gelagerten Antriebsmotors 104 gekuppelt ist. Man erkennt den Antriebsmotor 104 in Figur 1 auf der in Förderrichtung des Drahtes rechten Seite. Der zylindrische Abschnitt 93 ist an seinem in Förderrichtung gesehen hinterem Ende ebenfalls mittels eines Zahnriemenantriebes 105 mit einem Antriebsmotor 106 verbunden, welcher Antriebsmotor 106 auf der linken Seite der Vorrichtung gelegen ist (siehe Figur 1). Der Träger 94 besitzt exzentrisch einen Vorsprung 107, in welchem eine quer zur Förderrichtung des Drahtes verlaufende Aufnahmebohrung 108 eingebracht ist, in der mittels Lagerelementen 109 ein Zapfen 110 aufgelagert ist, an dessen der Fördermittelachse des Drahtes, die in der Figur 2 mit M-M bezeichnet ist, zugewandten Ende ein als Biegezapfenträger dienender Drehteller 111 angebracht ist, an dem exzentrisch zur Mittelachse des Zapfens 110 ein Biegezapfen 112 angebracht ist. Dieser Biegezapfen 112 dreht sich um die Mittelachse des Zapfens 110 und beschreibt auf diese Weise einen Hohlzylinder, der von der Mittelachse der Förderrichtung des Drahtes durchdrungen ist, so daß dann, wenn der Draht aus der Durchgangsbohrung 98 herausragt, der Biegezapfen 112 den Draht biegen kann, wenn er angetrieben über den Drehteller 111 sich auf seinem Zylinderbogen bewegt. Der Drehteller 111 ist ebenfalls als Kegelzahnrad ausgebildet und kämmt mit dem Kegelzahnrad 100.A bearing block 90, on which a bending head 91 is supported, is fastened to the clamping device 22, which lies at the front in the conveying direction. Reference is made to this in FIG. 2. The bearing block 91a can be seen schematically, which has a cylindrical longitudinal bore 92, in which the cylindrical section 93 of a carrier 94 is rotatably supported by means of bearing elements 95, preferably ball bearings. The cylindrical section 93 is likewise provided with a cylindrical bore 96, in the interior of which a drive shaft or a drive pin 99, which is mounted with a through bore 98, is received by means of bearing elements 97. At the front end, the drive pin has a bevel gear 100. At the rear end, the drive pin 99 has a gear 101 which is coupled via a toothed belt drive 102 to the pinion 103 of a fixedly mounted drive motor 104. The drive motor 104 can be seen in FIG. 1 on the right-hand side in the conveying direction of the wire. The cylindrical section 93 is also connected at its rear end in the conveying direction by means of a toothed belt drive 105 to a drive motor 106, which drive motor 106 is located on the left side of the device (see FIG. 1). The carrier 94 has an eccentric projection 107, in which a receiving bore 108 running transversely to the conveying direction of the wire is made, in which a pin 110 is supported by means of bearing elements 109, on the axis of the conveying axis of the wire, which is denoted by MM in FIG. 2 , facing end, a rotating plate 111 serving as a bending pin carrier is attached, on which a bending pin 112 is attached eccentrically to the central axis of the pin 110. This bending pin 112 rotates about the central axis of the pin 110 and in this way describes a hollow cylinder which is penetrated by the central axis of the conveying direction of the wire is, so that when the wire protrudes from the through hole 98, the bending pin 112 can bend the wire when it is driven by the turntable 111 on its cylindrical arc. The turntable 111 is also designed as a bevel gear and meshes with the bevel gear 100.

Um den Biegezapfen 112 ist Drehung zu versetzen, wird mittels des Motors 104 der Antriebszapfen 99 angetrieben, wodurch sich das Kegelzahnrad 100 und damit auch das Kegelzahnrad 111 drehen. Wenn sich die Biegerichtung ändern soll, werden beide Motoren 104 und 106 angetrieben. Und weil die Umfangsgeschwindigkeiten der Kegelzahnräder 100 und 111 gleich sind, bleibt der Zapfen 112 in seiner winkeligen Lage bezogen auf den Zapfen 110 stehen. Der Motor 106 bewirkt wohl die Verdrehung des Vorsprunges 107, nicht aber der Biegezapfen 112 um seine Achse verdreht. Gegebenenfalls kann durch einen Drehmeßaufnehmer am Motor 104 auch die Drehbewegung des Zapfens 112 um die Mittelachse des Zapfens 110 gemessen werden, so daß keine rechten Winkel abgebogen werden, sondern Winkel zwischen 0 und 90°. Selbstverständlich kann auch am Motor 106 ein solcher Drehmeßaufnehmer angeordnet sein, um die winkelige Stellung des Trägers einstellen zu können.In order to offset the bending pin 112, the drive pin 99 is driven by means of the motor 104, as a result of which the bevel gear 100 and thus also the bevel gear 111 rotate. If the bending direction is to change, both motors 104 and 106 are driven. And because the peripheral speeds of the bevel gears 100 and 111 are the same, the pin 112 remains in its angular position in relation to the pin 110. The motor 106 probably causes the projection 107 to rotate, but the bending pin 112 does not rotate about its axis. If necessary, the rotary movement of the pin 112 about the central axis of the pin 110 can also be measured by a rotary transducer on the motor 104, so that no right angles are bent, but angles between 0 and 90 °. Of course, such a rotary transducer can also be arranged on the motor 106 in order to be able to adjust the angular position of the carrier.

Die Ausführung der Figur 2 ist bei der Maschine nach Figur 1 verwirklicht. Man erkennt dort die beiden hintereinandergelegenen Zahnräder 101 und das Zahnrad 113 des Zahnriementriebes 105, die von den Motoren 104 und 106 angetrieben werden.The embodiment of FIG. 2 is implemented in the machine according to FIG. 1. One can see there the two gear wheels 101 and the gear wheel 113 of the toothed belt drive 105, which are driven by the motors 104 and 106.

Die Figur 3 zeigt eine weitere Ausgestaltung der Erfindung. In dem Lagerbock 91a ist ein Träger 114 in Form einer hohlzylindrischen Welle gelagert. Das in Förderrichtung gesehen hintere, in der Figur 3 links gelegene Ende ist mit einem Zahnrad 115 versehen, das über einen Zahnriemen 116 mit einem Ritzel 117 eines Antriebsmotors 118 gekoppelt ist. Am vorderen Ende befindet sich ein L-förmiger Halter 119, dessen einer Schenkel 120 an der Stirnfläche der Welle 114 und dessen anderer Schenkel exzentrisch zu der Mittellängsachse des Drahtes angeordnet ist. Auf der Außenfläche des Schenkels 121 ist ein Antriebsmotor 122 befestigt, dessen Längsachse quer zur Linie M-M ausgerichtet ist. Der den Schenkel 121 durchgreifende Motorzapfen 123 trägt einen Drehteller 124, an dem ein Biegezapfen 125 befestigt ist. Die Wirkungsweise ist die gleiche wie die der Vorrichtung nach Figur 2, wobei lediglich der Motor 104 als Motor 122 direkt am Trägerkopf über den L-förmigen Halter 119 befestigt ist. Aufgrund der Gewichtsverhältnisse des Motors 122 ist die Anordnung gemäß Figur 3 nicht ganz so optimal wie die gemäß Figur 2.FIG. 3 shows a further embodiment of the invention. A carrier 114 in the form of a hollow cylindrical shaft is mounted in the bearing block 91a. The rear end, seen in the conveying direction, on the left in FIG. 3, is provided with a toothed wheel 115, which is coupled via a toothed belt 116 to a pinion 117 of a drive motor 118. At the front end there is an L-shaped holder 119, one leg 120 of which is arranged on the end face of the shaft 114 and the other leg is arranged eccentrically to the central longitudinal axis of the wire. On the outer surface of the leg 121, a drive motor 122 is attached, the longitudinal axis of which is oriented transversely to the line M-M. The motor pin 123 passing through the leg 121 carries a turntable 124, to which a bending pin 125 is fastened. The mode of operation is the same as that of the device according to FIG. 2, only the motor 104 as the motor 122 being attached directly to the carrier head via the L-shaped holder 119. Due to the weight ratios of the motor 122, the arrangement according to FIG. 3 is not quite as optimal as that according to FIG. 2.

Die Figur 6 zeigt eine Rollenanordnung bzw. ein Rollenpaar mit einer angetriebenen Rolle 29 und einer lose mitlaufenden Rolle 35. Die lose mitlaufende Rolle 35 besitzt einen V-förmigen Ausschnitt 126 am Umfang, so daß der Draht 72 an drei Stellen gepreßt wird, wie durch die Pfeile P1, P2 und P3 dargestellt.FIG. 6 shows a roller arrangement or a pair of rollers with a driven roller 29 and a loose idler roller 35. The idler idler roller 35 has a V-shaped cutout 126 on the circumference, so that the wire 72 is pressed at three points, as by arrows P1, P2 and P3 are shown.

Die Antriebsmotoren 104, 106; 118 und 120 sind Schrittmotoren, die in bestimmte winklige Stellungen ihrer Antriebszapfen verdrehbar sind.The drive motors 104, 106; 118 and 120 are stepper motors that can be rotated into certain angular positions of their drive pins.

Oben ist dargestellt worden, daß das Schneideelement 62 mittels einer Kolben-Zylinderanordnung 79, 80, 81 nach unten gezogen wird. Selbstverständlich kann auch das Schneideelement 62 ortsfest angeordnet und der Amboß 56 nach oben bewegbar sein. Unter bestimmten Steuerungsumständen können auch beide mittels einer geeigneten Mechanik gegeneinander bewegt werden.It has been shown above that the cutting element 62 is pulled down by means of a piston-cylinder arrangement 79, 80, 81. Of course, the cutting element 62 can also be arranged in a stationary manner and the anvil 56 can be moved upwards. Under certain control circumstances, both can also be moved against one another by means of suitable mechanics.

Die Zentralbohrung 98 durch den Antriebszapfen 99 muß natürlich in dem Bereich, in dem sich der Biegezapfen 112 befindet, entsprechend geformt sein. Sie besitzt demgemäß eine in der Figur 2 nicht dargestellte Verengung an dem in Förderrichtung vorn gelegenen Stirnende, deren Innendurchmesser dem größten Drahtdurchmesser entspricht, und am Übergang von der Innenwandung dieser Verengung zu der äußeren Stirnfläche des Antriebszapfen, der in der Figur 2 die äußeren Stirnfläche des Kegelrades 100 ist, ist ein kreisförmiger Übergang vorgesehen, durch den ein Biegeradius gebildet wird. Mit anderen Worten: dort befindet sich eine Art Trichter, dessen Trichteröffnung dem erforderlichen Biegeradius entspricht.The central bore 98 through the drive pin 99 must of course be shaped accordingly in the area in which the bending pin 112 is located. Accordingly, it has a constriction (not shown in FIG. 2) at the front end located in the conveying direction, the inside diameter of which corresponds to the largest wire diameter, and at the transition from the inner wall of this constriction to the outer end face of the drive pin, which in FIG Bevel gear 100, a circular transition is provided, through which a bending radius is formed. In other words: there is a kind of funnel, the funnel opening of which corresponds to the required bending radius.

Die Biegevorrichtung oder Biegemaschine wird elektronisch mittels einer Programmsteuerung angesteuert, wobei die Programmsteuerung die Elektromotoren zum Biegen und zum Vorschieben des Drahtes sowie Elektromagnetventile zur Betätigung der Kolben-Zylinderanordnung 79, 80 und 81 ansteuert. Dabei sind eingegeben als feste Größen die Abstände der einzelnen Entisoliervorrichtungen, des Biegekopfes, d. h. des Biegezapfens in der Stellung, in der er in unmittelbarer Nähe des Biegeradius sich bewegt, sowie der Abstand einer Abtrennvorrichtung, die in Figur 1 nicht gezeigt ist, von diesem Biegepunkt; eingegeben als variable Größen, werden der Durchmesser des Drahtes, die Länge des Drahtes zwischen Biegepunkt und Abschneidelänge, wobei der Biegeradius mit berücksichtigt wird, die Biegerichtung, die Anzahl der abgebogenen Drähte und die Abisolierlänge.The bending device or bending machine is controlled electronically by means of a program control, the program control controlling the electric motors for bending and advancing the wire, as well as electromagnetic valves for actuating the piston-cylinder arrangement 79, 80 and 81. The distances between the individual stripping devices, the bending head, d. H. the bending pin in the position in which it moves in the immediate vicinity of the bending radius, and the distance of a separating device, which is not shown in FIG. 1, from this bending point; Entered as variable sizes are the diameter of the wire, the length of the wire between the bending point and the cutting length, taking into account the bending radius, the bending direction, the number of bent wires and the stripping length.

Claims (18)

  1. Wire-bending machine for wire which is provided with an insulation and consists of solid material, having a wire-feeding station, having a bending station by means of which the wire is bent around, having at least one stripping station and having a cutting-off station, characterized in that the bending station exhibits a carrier (94) which can rotate about the longitudinal axis of the fed wire and is intended for a bending-pin carrier (111, 124) with bending pin (112, 125) fitted thereon, in that the bending-pin carrier (111, 124) is mounted on the carrier (94, 114) such that it can rotate about an axis running perpendicularly to the longitudinal axis of the wire advancement, and in that the bending pin (112, 125) is fastened excentrically on the bending-pin carrier (111, 124), the longitudinal axis of said bending pin running parallel to its rotational axis, and its length, measured from the bending-pin carrier, being greater than the distance of the bending-pin carrier from the longitudinal axis of the wire, with the result that, in operation, the bending pin (112, 125) effects a movement of cylindrical form, and the central axis of the wire intercepts the cylindrical form.
  2. Bending machine according to Claim 1, characterized in that the carrier (94, 114) and the bending-pin carrier (111, 124) can be made to rotate, independently of one another, in each case about their axis.
  3. Bending machine according to Claim 2, characterized in that on the carrier (114) there is fastened a motor (122) for rotating the bending-pin carrier (124).
  4. Bending machine according to one of Claims 1 to 3, characterized in that the carrier (114) is configured as a sleeve which encloses the wire, which is to be fed in order to guide it.
  5. Apparatus according to one of Claims 1, 2 and 4, characterized in that the carrier (94) exhibits a cylinder portion (93) and a bearing block (protrusion 107) which is fitted thereon and has a cylindrical bore (108) through which the rotational axis of the bending-pin carrier (111, 124) passes.
  6. Bending machine according to Claim 5, characterized in that the cylinder portion (93) surrounds a drive shaft (99) having a central through-passage bore (98) for receiving the wire, in that rotary bearings (97) are provided between cylinder portion (93) and drive shaft (99), and in that the drive shaft (99) carries a bevel gear wheel (100) which meshes with the bending-pin carrier (111) which is configured as a bevel gear wheel.
  7. Bending machine according to one of the preceding claims, characterized in that there are provided two drive motors (104, 106) which drive the drive shaft (99) and the carrier (94), preferably by means of a toothed-belt drive (102, 105) in each case.
  8. Bending machine according to one of Claims 1 to 6, characterized in that there are provided two drive motors (118, 122), of which one drives the carrier (114) and the other drives the bending-pin carrier (124) and is fastened on the carrier (114).
  9. Bending machine according to one of the preceding claims, characterized in that, in order to drive the wire, there are provided two roller pairs which exhibit in each case one driven roller (29, 30) and one idling roller (35, 36), which receive the wire between them and convey it by means of frictional gripping.
  10. Bending machine according to Claim 9, characterized in that one roller (29) of the roller pair located at the rear in the wire-conveying direction is driven by means of a motor (31), and in that one roller (30) of the roller pair located at the front is driven by means of a chain or toothed-belt drive (34).
  11. Bending machine according to Claim 9 or 10, characterized in that the pressure of the roller pair (30, 36), located at the front in the conveying direction, on the wire located therebetween is greater than that of the rear roller pair (29, 35), with the result that the wire region between the roller pairs is tensioned.
  12. Bending machine according to Claim 11, characterized in that the diameter at least of the driven roller (30) of the roller pair located at the front in the wire-conveying direction is greater than that of the rollers (29, 35) of the other roller pair.
  13. Bending machine according to Claim 12, characterized in that the idling, non-driven rollers (35, 36) of each roller pair are arranged above the driven rollers (29, 30) and can be raised upwards from the associated driven roller (29, 30) counter to the force of a spring (48).
  14. Bending machine according to one of the preceding claims, characterized in that at least one stripping station (56, 59; 62, 67, 68) is arranged between the roller pairs.
  15. Bending machine according to one of the preceding claims, characterized in that the stripping station exhibits an anvil (56) on which the wire bears, the bearing surface (anvil surface 59) in the direction transverse to the conveying direction of the wire corresponding approximately to the diameter of the core of the wire, in that there is provided a U-shaped cutting element (62) which can be displaced relative to the anvil (56), perpendicularly to the conveying direction, and the leg ends of which are provided with cutting edges (67, 68), and in that the distance between the legs corresponds to the width of the anvil surface and thus approximately to the thickness of the core of the wire, with the result that, by moving the cutting element over the anvil (56), in the event of which the legs receive the anvil between them, portions of the wire insulation are cut off.
  16. Bending machine according to Claim 14, characterized in that there are provided vertically running cutting knives (57, 58; 69, 70) which are in each case connected respectively to the anvil (56) and to the cutting element (62) on the end sides in front of and behind said anvil and cutting element, as seen in the wire-conveying direction, and which separate off, from the top and bottom, the insulation of the wire in front of and behind the anvil and the cutting element.
  17. Bending machine according to Claim 15 or 16, characterized in that either the anvil with its associated cutting knives and/or the cutting element with its associated cutting knives can be displaced with respect to one another by means of a piston/cylinder arrangement.
  18. Bending machine according to one of the preceding claims, characterized in that it exhibits a stand which is formed by two spaced-apart, vertically aligned foot supports (11, 12), in each case one crossmember, associated to each foot support (11, 12), and carrier tubes (15, 16) which are fitted on the crossmembers at a horizontal distance therefrom, there being provided clamping devices (17, 18, 19, 20, 21, 22) which can be adjustably fixed or clamped on the carrier tubes (15, 16) and carry individual components of the bending machine, such as conveying-roller pairs, stripping stations, bending head and the like.
EP91113832A 1990-08-25 1991-08-19 Wire bending machine for insulated wire Expired - Lifetime EP0473036B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4026989 1990-08-25
DE4026989A DE4026989C2 (en) 1990-08-25 1990-08-25 Wire bending machine for wire with insulation

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EP0473036A2 EP0473036A2 (en) 1992-03-04
EP0473036A3 EP0473036A3 (en) 1992-08-12
EP0473036B1 true EP0473036B1 (en) 1994-07-27

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DE59102329D1 (en) 1994-09-01
DE4026989C2 (en) 1994-01-13
EP0473036A2 (en) 1992-03-04
EP0473036A3 (en) 1992-08-12
DE4026989A1 (en) 1992-02-27

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