EP3225325B2 - Coiling tool for spring coiling machine - Google Patents

Coiling tool for spring coiling machine Download PDF

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Publication number
EP3225325B2
EP3225325B2 EP17156349.7A EP17156349A EP3225325B2 EP 3225325 B2 EP3225325 B2 EP 3225325B2 EP 17156349 A EP17156349 A EP 17156349A EP 3225325 B2 EP3225325 B2 EP 3225325B2
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EP
European Patent Office
Prior art keywords
coiling
tool
insert
tool holder
tool according
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EP17156349.7A
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German (de)
French (fr)
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EP3225325B1 (en
EP3225325A1 (en
Inventor
Alexander JANNOTTI
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Wafios AG
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Wafios AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically
    • B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like

Definitions

  • the invention relates to a coiling tool for a spring coiling machine, with a tool holder and an exchangeable coiling insert that is attached to the tool holder.
  • the wire coming from a wire feeder is advanced against one or two coiling fingers or against coiling pins, deflected by them on a circular path and formed as a spring.
  • the winding tools used there are those in which the tool holder and the winding insert are made in one piece or the winding insert is soldered into the tool holder.
  • the EP 2 520 384 A1 describes a winding tool and forms the basis for the preamble of claim 1.
  • a winding tool is described in which a winding insert is used, which is fastened in an exchangeable and adjustable manner in a tool holder and held there with a claw arrangement. Different orientations and positioning of the winch insert can be set using a large number of adjusting screws.
  • this known tool however, there are a large number of different individual elements, some of which can be rotated, which is quite complicated in the overall arrangement and requires a relatively large amount of space.
  • the U.S. 7,082,797 B1 describes a winding tool in which the winding insert is inserted into a recessed receptacle in the front end area of the tool holder that corresponds to its shape and is fastened there by means of a screw.
  • the tool holder is at its front end, where the winch insert protrudes from it, provided with a lateral widening, which means that z. B. in the case of a two-finger winch system, two such tools cannot be placed side by side or moved together very closely.
  • the winding insert fastened to the tool holder has to be replaced when it can no longer be used due to wear, which is relatively expensive.
  • a winding tool of the type mentioned is in the spring coiling machine from U.S. 4,387,585 deployed. It consists of a freely rotatable roller that is attached to a tool holder and against which the wire being fed runs for deflection. Winding rolls of this type are preferably used in large machines in which there is considerable friction between the tool and the workpiece. However, it is necessary to use fitted screws, roller bearings, sealing rings and lubrication for the rotatable bearing of the winding roll, which is considerably expensive. In the event of wear and tear on the winding roll or other damage, the winding roll must be replaced, which means a noticeable installation effort and is costly.
  • the invention is based on the object of proposing a winding tool of the type mentioned at the outset, which can be used again quickly in the event of wear or breakage of the winding insert without having to change it.
  • the winding insert comprises a cylindrical base and, axially next to this, a winding body, with the cylindrical base being non-rotatably attached to a bearing surface formed on the front end region of the tool holder in the assembled state, and in its area opposite this front end area rests against a supporting step that delimits the contact surface there and runs in the shape of a segment of a circle, and that the winch insert is fastened to the tool holder via a central clamping means, and that on the side of the cylindrical base facing the contact surface of the tool holder there is an effective in its circumferential direction Grid is attached, which is associated with a corresponding locking counter-element on the bearing surface of the tool holder.
  • the coiling tool according to the invention is set up once in terms of its axial position when it is installed in the spring coiling machine. After that, the location and position of the winding tool no longer has to be changed, since even if the winding insert wears out, breaks, or the like, only the central clamping device is loosened slightly, the winding insert is then rotated a little further and then the clamping device is tightened again got to. This is made possible by the non-rotatable attachment of the winch insert to the tool holder, which, unlike a rotating winch reel, means that wear, breakage or the like during winding can only occur at the point where the wire runs against the winch insert.
  • the coil insert which is mounted non-rotatably on the tool holder, is supported with its rear side facing away from the front side of the tool holder (and thus the contact point of the wire to be coiled) on the support step, which is formed on the tool holder, so that the the forces acting on the use of the winch cannot (or only to a small extent) be absorbed by the central tensioning means, with the majority of the forces to be absorbed being supported by the support stage.
  • fastening means can also be provided for the central clamping means for fastening the winch insert to the tool holder, but it is particularly advantageous if a screw or a screw bolt or a clamping claw is used for this purpose.
  • a quick-release fastener can also be equally advantageous.
  • such a grid can be in the form of a circumferential toothing or in the form of radially running grooves on the winding insert, which interact positively with suitable counter-elements, such as feather keys or pins, in the bearing surface of the tool holder.
  • the height of the support step corresponds approximately to the axial thickness of the cylindrical base, so that the peripheral surface of the support base is available locally over its entire height for the transmission of the support forces acting between the two.
  • the winding body located axially next to the support base can be provided in any suitable form, but is particularly preferably designed in a circular form as a winding roller or else in the form of a polygonal body. In this case, the winch body and the support base are preferably formed in one piece.
  • the winch body is provided on its circumference with a circumferential groove for wire guidance.
  • the winding insert is preferably made of hard metal, tool steel, ceramic or a fiber composite material.
  • In 1 is shown in a perspective oblique view of the structure of a wire forming machine in the form of a spring coiling machine 1 (only in principle).
  • This has a machine frame 2, which is only indicated in the drawing, and on the front side of which a wire feeder 3 is attached, which is formed from several pairs of wire feeder rollers 4 arranged next to one another.
  • An endless wire 5 is conveyed to a wire guide 6 via this and advanced through it into a winding station 7 .
  • two winding units 7a and 7b are arranged one above the other, one (in 1 although not shown) incline device may be present.
  • the wire 5 is drawn in through the wire feed 3 via the wire feed rollers 4 via a (in 1 not shown) program-controlled servo motor.
  • the spring coiling machine 1 according to 1 is further provided with a cutting unit 8, which works with a movable cutting tool 9, which cooperates with a cutting mandrel 10 during the cutting process.
  • Each winding unit 7a, 7b is provided with a winding tool 11 which, like the 1 shows, is attached to a lever 12a and 12b, respectively.
  • Each of these levers 12a, 12b is in turn moved via an associated cam 14a or 14b with the interposition of a roller 13a or 13b guided on the corresponding cam, with each of the cams 14a or 14b being driven by its own program-controlled servomotor.
  • the control cams 14a, 14b are driven intermittently both forwards and backwards.
  • In 2 is a winding tool 11 in a perspective view and in 3 the same winding tool shown in an exploded view. Reference is first made to these figures.
  • the winding tool 11 first comprises an elongate tool holder 15 which, at its front end region (into the Figures 2 and 3 : upper end area), which faces the wire 5 in the mounted state, has a substantially flat bearing surface 16, which is delimited at its area opposite the front end area by a support step 17 running in the shape of a segment of a circle.
  • This support surface 16 is open towards the front end of the tool holder 15 (cf. 3 ), whereby when the winch insert 18 is mounted, it protrudes forwards at the front end of the tool holder 15 (see 2 ).
  • the winding insert 18 is fixed on the bearing surface 16 via a central fastening screw 19 which is screwed into a threaded hole 20 which is arranged centrally in the bearing surface 16 of the tool holder 15 .
  • the winding insert 18 includes, like the Figures 2 and 3 show, a lower (ie the bearing surface 16 facing) cylindrical base 21, which is axially directly (and on the bearing surface 16 facing away from the cylindrical base 21) a winding body 22 connects.
  • This winding body 22 is provided on its circumference with a circumferential winding groove 23 against which the conveyed wire 5 runs during operation and is deflected by it onto a circular path and formed into a helical shape.
  • a straight receiving groove 25 is attached, in which two feather keys 26, each on one side of the threaded bore 20 at the end of the receiving groove there 25, are used and fastened in each case via a fastening screw 27 in the groove 25.
  • the depth of the receiving groove 25 is selected so that the feather keys 26 inserted there protrude in the assembled state on the open upper side of the receiving groove 25 and, when the winch body 22 is assembled, protrude into one of the radially star-shaped outwardly extending grooves 24, whereby a non-rotatable connection of the winding body 22 to the tool holder 15 is created.
  • the coil insert 18 becomes worn or even breaks, it is only necessary to loosen the fastening screw 19 for the coil insert 18 to such an extent that the coil insert 18 is lifted axially from the support surface 16 until the grooves 24 disengage the keys 26, after which the winding insert 18 is rotated until the following groove 24 on the underside of the cylindrical base 21 overlies the keys 26. Subsequently the winding insert 18 can again be displaced axially towards the bearing surface 16, with the feather keys 26 now being able to engage in the new groove 24 on the underside of the cylindrical base 21 lying above them. After this, only the fastening screw 19 has to be tightened and the winding insert 18 can be used again immediately.
  • the winch insert 18 with a polygonal body 28, which is also provided with a circumferential winch groove 23, which here on the graphic representation of 6 expressly referred to as essential.
  • the polygonal body 28 is an octagonal body, although a decagonal or twelve-sided or even just a hexagonal body could also be used here.
  • the height H of the support step 17 corresponds to the axial length h of the cylindrical base 21, which can thus be supported over the entire height H of the support step 17 under load when it is mounted on the bearing surface 16.
  • the winch insert 18 can be made of any suitable material, but is preferably made of hard metal, tool steel, ceramic or a fiber composite material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Wind Motors (AREA)
  • Springs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Description

Die Erfindung bezieht sich auf ein Windewerkzeug für eine Federwindemaschine, mit einem Werkzeughalter und einem auswechselbaren Windeeinsatz, der am Werkzeughalter befestigt ist.The invention relates to a coiling tool for a spring coiling machine, with a tool holder and an exchangeable coiling insert that is attached to the tool holder.

Bei Federwindemaschinen, für welche das erfindungsgemäße Windewerkzeug einsetzbar ist, wird der von einem Drahteinzug herkommende Draht gegen einen oder auch zwei Windefinger oder gegen Windestifte vorgeschoben, durch diese auf eine Kreisbahn abgelenkt und als Feder geformt.In spring coiling machines for which the coiling tool according to the invention can be used, the wire coming from a wire feeder is advanced against one or two coiling fingers or against coiling pins, deflected by them on a circular path and formed as a spring.

Bei den eingesetzten Windewerkzeugen gibt es solche, bei denen der Werkzeughalter sowie der Windeeinsatz einstückig ausgeführt sind oder der Windeeinsatz in den Werkzeughalter eingelötet wird. Die EP 2 520 384 A1 beschreibt ein Windewerkzeug und bildet die Basis für den Oberbegriff des Anspruchs 1. In der EP 0 344 178 B1 wird ein Windewerkzeug beschrieben, bei dem ein Windeeinsatz eingesetzt wird, der auswechselbar und verstellbar in einem Werkzeughalter befestigt und dort mit einer Pratzenanordnung gehaltert ist. Dabei sind über eine Vielzahl von Einstellschrauben unterschiedliche Ausrichtungen und Positionierungen des Windeeinsatzes einstellbar. Bei diesem bekannten Werkzeug liegt jedoch eine Vielzahl unterschiedlicher, teils verdrehbarer Einzelelemente vor, was ziemlich kompliziert in der Gesamtanordnung ist und relativ viel Platz benötigt.In the case of the winding tools used, there are those in which the tool holder and the winding insert are made in one piece or the winding insert is soldered into the tool holder. the EP 2 520 384 A1 describes a winding tool and forms the basis for the preamble of claim 1. In the EP 0 344 178 B1 a winding tool is described in which a winding insert is used, which is fastened in an exchangeable and adjustable manner in a tool holder and held there with a claw arrangement. Different orientations and positioning of the winch insert can be set using a large number of adjusting screws. In this known tool, however, there are a large number of different individual elements, some of which can be rotated, which is quite complicated in the overall arrangement and requires a relatively large amount of space.

Die US 7 082 797 B1 beschreibt ein Windewerkzeug, bei dem der Windeeinsatz in eine seiner Form entsprechende, vertiefte Aufnahme im vorderen Endbereich des Werkzeughalters eingesetzt und dort mittels einer Schraube befestigt wird. Dabei ist der Werkzeughalter an seinem vorderen Endbereich, wo der Windeeinsatz aus ihm vorragt, mit einer seitlichen Verbreiterung versehen, was dazu führt, daß z. B. im Fall eines Zweifinger-Windesystems zwei solche Werkzeuge nicht sehr eng seitlich nebeneinander plaziert bzw. zusammengefahren werden können. Bei diesem bekannten Windewerkzeug muß der am Werkzeughalter befestigte Windeeinsatz, wenn er infolge Verschleißes nicht mehr weiter verwendet werden kann, ausgetauscht werden, was relativ kostspielig ist.the U.S. 7,082,797 B1 describes a winding tool in which the winding insert is inserted into a recessed receptacle in the front end area of the tool holder that corresponds to its shape and is fastened there by means of a screw. The tool holder is at its front end, where the winch insert protrudes from it, provided with a lateral widening, which means that z. B. in the case of a two-finger winch system, two such tools cannot be placed side by side or moved together very closely. In this known winding tool, the winding insert fastened to the tool holder has to be replaced when it can no longer be used due to wear, which is relatively expensive.

Ein Windewerkzeug der eingangs genannten Art wird bei der Federwindemaschine aus der US 4 387 585 eingesetzt. Es besteht aus einer frei drehbaren Rolle, die an einem Werkzeughalter befestigt ist und gegen die der angeförderte Draht zur Umlenkung anläuft. Solche Winderollen werden bevorzugt bei großen Maschinen eingesetzt, bei denen eine recht erhebliche Reibung zwischen Werkzeug und Werkstück auftritt. Allerdings ist es erforderlich, für die drehbare Lagerung der Winderolle Paßschrauben, Wälzlager, Dichtringe und eine Schmierung einzusetzen, was erheblich kostspielig ist. Im Falle von Verschleiß an der Winderolle oder einer sonstigen Beschädigung muß die Winderolle ausgewechselt werden, was einen merklichen Montageaufwand bedeutet und kostenintensiv ist.A winding tool of the type mentioned is in the spring coiling machine from U.S. 4,387,585 deployed. It consists of a freely rotatable roller that is attached to a tool holder and against which the wire being fed runs for deflection. Winding rolls of this type are preferably used in large machines in which there is considerable friction between the tool and the workpiece. However, it is necessary to use fitted screws, roller bearings, sealing rings and lubrication for the rotatable bearing of the winding roll, which is considerably expensive. In the event of wear and tear on the winding roll or other damage, the winding roll must be replaced, which means a noticeable installation effort and is costly.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, ein Windewerkzeug der eingangs genannten Art vorzuschlagen, das bei auftretendem Verschleiß oder Bruch des Windeeinsatzes ohne einen Wechsel desselben rasch wieder einsetzbar ist.Proceeding from this, the invention is based on the object of proposing a winding tool of the type mentioned at the outset, which can be used again quickly in the event of wear or breakage of the winding insert without having to change it.

Erfindungsgemäß wird dies bei einem Windewerkzeug der eingangs genannten Art dadurch erreicht, daß der Windeeinsatz einen zylindrischen Sockel und, axial neben diesem, einen Windekörper umfaßt, wobei im montierten Zustand der zylindrische Sockel auf einer am vorderen Endbereich des Werkzeughalters ausgebildeten Auflagefläche drehfest angebracht ist, sowie an seinem diesem vorderen Endbereich gegenüberliegenden Bereich gegen eine die Auflagefläche dort begrenzende, kreisabschnittförmig verlaufende Stützstufe anliegt, und daß der Windeeinsatz über ein zentrales Spannmittel am Werkzeughalter befestigt ist, und daß an der der Auflagefläche des Werkzeughalters zugewandten Seite des zylindrischen Sockels eine in dessen Umfangsrichtung wirksame Rasterung angebracht ist, der auf der Auflagefläche des Werkzeughalters ein entsprechendes Verrastungs-Gegenelement zugeordnet ist.According to the invention, this is achieved with a winding tool of the type mentioned at the outset in that the winding insert comprises a cylindrical base and, axially next to this, a winding body, with the cylindrical base being non-rotatably attached to a bearing surface formed on the front end region of the tool holder in the assembled state, and in its area opposite this front end area rests against a supporting step that delimits the contact surface there and runs in the shape of a segment of a circle, and that the winch insert is fastened to the tool holder via a central clamping means, and that on the side of the cylindrical base facing the contact surface of the tool holder there is an effective in its circumferential direction Grid is attached, which is associated with a corresponding locking counter-element on the bearing surface of the tool holder.

Das erfindungsgemäße Windewerkzeug wird beim Einbau in die Federwindemaschine bezüglich seiner axialen Position einmal eingerichtet. Danach muß die Lage und Position des Windewerkzeugs nicht mehr verändert werden, da selbst im Falle eines auftretenden Verschleißes, eines Bruchs des Windeeinsatzes o. ä. nur das zentrale Spannmittel etwas gelöst, anschließend der Windeeinsatz ein Stückchen weiter gedreht und sodann das Spannmittel wieder angezogen werden muß. Dies wird ermöglicht durch die drehfeste Anbringung des Windeeinsatzes am Werkzeughalter, durch die, anders als bei einer drehbaren Winderolle, auftretender Verschleiß, Bruch o. ä. während des Windens nur an der Stelle, an der der Draht gegen den Windeeinsatz anläuft, auftreten kann. Wird durch Lösen des Spannmittels und durch Verdrehen des Windeeinsatzes ein neuer, unbeschädigter Abschnitt des letzteren an die Anlaufstelle des Drahtes verbracht, was durch eine kleine Verdrehung des Windeeinsatzes besonders rasch durchführbar ist, dann kommt es nicht nur zu einer nur kurzen Unterbrechung beim Arbeitseinsatz der Federwindemaschine, sondern der Windeeinsatz kann auch ziemlich oft in dieser Weise weitergedreht werden, was zu einer besonders guten Ausnutzung des Windewerkzeugs und damit zu einer Einsparung von Werkzeugkosten führt.The coiling tool according to the invention is set up once in terms of its axial position when it is installed in the spring coiling machine. After that, the location and position of the winding tool no longer has to be changed, since even if the winding insert wears out, breaks, or the like, only the central clamping device is loosened slightly, the winding insert is then rotated a little further and then the clamping device is tightened again got to. This is made possible by the non-rotatable attachment of the winch insert to the tool holder, which, unlike a rotating winch reel, means that wear, breakage or the like during winding can only occur at the point where the wire runs against the winch insert. If a new, undamaged section of the latter is brought to the contact point of the wire by releasing the tensioning device and twisting the winch insert, which can be carried out particularly quickly by twisting the winch insert slightly, then there is not just a brief interruption when the spring coiling machine is used, but the coiling insert can also be turned further in this way quite often, which leads to a particularly good utilization of the coiling tool and thus to a saving in tool costs.

Im Arbeitszyklus der Federwindemaschine stützt sich der Windeeinsatz, der am Werkzeughalter unverdrehbar montiert ist, mit seiner der Vorderseite des Werkzeughalters (und damit der Anlaufstelle des zu windenden Drahtes) abgewandten Rückseite an der Stützstufe, die am Werkzeughalter ausgebildet ist, ab, so daß die auf den Windeeinsatz einwirkenden Kräfte nicht (oder nur zu einem geringen Teil) über das zentrale Spannmittel aufzunehmen sind, wobei der wesentliche Anteil der aufzunehmenden Kräfte von der Stützstufe abgestützt wird.In the working cycle of the spring coiling machine, the coil insert, which is mounted non-rotatably on the tool holder, is supported with its rear side facing away from the front side of the tool holder (and thus the contact point of the wire to be coiled) on the support step, which is formed on the tool holder, so that the the forces acting on the use of the winch cannot (or only to a small extent) be absorbed by the central tensioning means, with the majority of the forces to be absorbed being supported by the support stage.

Auch können bei dem erfindungsgemäßen Windewerkzeug bei einem gleichen Werkzeughalter unterschiedliche Windeeinsätze für z. B. unterschiedliche Drahtdurchmesser eingesetzt und rasch ausgetauscht werden.With the winding tool according to the invention, different winding inserts for e.g. B. different wire diameters can be used and quickly replaced.

Zur drehfesten Montage des Windeeinsatzes am Werkzeughalter können alle einem Fachmann bekannten, hierfür sinnvollen Maßnahmen vorgesehen werden. Ganz besonders vorzugsweise werden jedoch eine (oder mehrere) Paßfeder(n) oder ein (oder auch mehrere) Arretierstift(e), bevorzugt in die Auflagefläche am Werkzeughalter geeignet eingelassen, zur drehfesten Anbringung des Windeeinsatzes vorgesehen.For the non-rotatable assembly of the winch insert on the tool holder, all measures known to a person skilled in the art that are useful for this purpose can be provided. Very particularly preferably, however, one (or more) feather key(s) or one (or more) locking pin(s), preferably suitably embedded in the bearing surface on the tool holder, are provided for non-rotatably attaching the winch insert.

Auch für das zentrale Spannmittel zur Befestigung des Windeeinsatzes am Werkzeughalter können alle geeigneten Befestigungsmittel vorgesehen werden, ganz besonders vorteilhaft ist es jedoch, wenn hierfür eine Schraube oder ein Schraubbolzen oder eine Spannpratze eingesetzt werden. Auch der Einsatz eines Schnellverschlusses kann gleichermaßen vorteilhaft sein.All suitable fastening means can also be provided for the central clamping means for fastening the winch insert to the tool holder, but it is particularly advantageous if a screw or a screw bolt or a clamping claw is used for this purpose. The use of a quick-release fastener can also be equally advantageous.

Bevorzugt kann eine solche Rasterung in Form einer umlaufenden Verzahnung oder auch in Form radial verlaufender Nuten am Windeeinsatz ausgebildet sein, die jeweils mit geeigneten Gegenelementen, etwa mit Paßfedern oder mit Stiften, in der Auflagefläche des Werkzeughalters formschlüssig zusammenwirken.Preferably, such a grid can be in the form of a circumferential toothing or in the form of radially running grooves on the winding insert, which interact positively with suitable counter-elements, such as feather keys or pins, in the bearing surface of the tool holder.

Es ist weiterhin bevorzugt, wenn die Höhe der Stützstufe angenähert der axialen Dicke des zylindrischen Sockels entspricht, damit für die Übertragung der zwischen beiden wirkenden Stützkräfte lokal die Umfangsfläche des Stützsockels in dessen gesamter Höhe verfügbar ist. Der axial neben dem Stützsockel vorliegende Windekörper kann in jeder geeigneten Form vorgesehen sein, wird aber besonders bevorzugt in kreisrunder Form als Winderolle oder auch in Form eines Polygonkörpers ausgebildet. Dabei sind Windekörper und Stützsockel bevorzugt einteilig geformt.It is also preferred if the height of the support step corresponds approximately to the axial thickness of the cylindrical base, so that the peripheral surface of the support base is available locally over its entire height for the transmission of the support forces acting between the two. The winding body located axially next to the support base can be provided in any suitable form, but is particularly preferably designed in a circular form as a winding roller or else in the form of a polygonal body. In this case, the winch body and the support base are preferably formed in one piece.

Vorteilhafterweise ist der Windekörper an seinem Umfang mit einer umlaufenden Rille zur Drahtführung versehen.Advantageously, the winch body is provided on its circumference with a circumferential groove for wire guidance.

Vorzugsweise besteht bei dem erfindungsgemäßen Windewerkzeug der Windeeinsatz aus Hartmetall, Werkzeugstahl, Keramik oder einem Faserverbundwerkstoff.In the case of the winding tool according to the invention, the winding insert is preferably made of hard metal, tool steel, ceramic or a fiber composite material.

Die Erfindung wird nachfolgend anhand der Zeichnung im Prinzip beispielshalber noch näher erläutert. Es zeigen:

Fig. 1
eine ganz prinzipielle perspektivische Vorderansicht einer Federwindemaschine mit zwei Windefingern mit jeweils einem erfindungsgemäßen Windewerkzeug;
Fig. 2
eine perspektivische Darstellung eines erfindungsgemäßen Windewerkzeuges;
Fig. 3
eine perspektivische Darstellung des Windewerkzeugs aus Fig. 2, jedoch in einem demontierten Zustand;
Fig. 4
eine perspektivische Darstellung eines Windeeinsatzes bei einem erfindungsgemäßen Windewerkzeug, gesehen von dessen Vorderseite her;
Fig. 5
eine perspektivische Darstellung des Windeeinsatzes aus Fig. 4, jedoch gesehen von dessen axialer Rückseite her;
Fig. 6
eine perspektivische Darstellung einer anderen Ausgestaltung eines Windeeinsatzes bei einem erfindungsgemäßen Windewerkzeug, gesehen auf dessen Vorderseite hin, sowie
Fig. 7
eine perspektivische Darstellung des Windeeinsatzes aus Fig. 6, jedoch gesehen auf dessen Rückseite hin.
The invention is explained in more detail below with reference to the drawing, in principle, by way of example. Show it:
1
a very basic perspective front view of a spring coiling machine with two coiling fingers, each with a coiling tool according to the invention;
2
a perspective view of a winding tool according to the invention;
3
a perspective view of the winding tool 2 , but in a dismantled state;
4
a perspective view of a winding insert in a winding tool according to the invention, seen from the front;
figure 5
a perspective view of the winch insert 4 , but viewed from its axial rear;
6
a perspective view of another embodiment of a winding insert in a winding tool according to the invention, viewed from the front side, and
Figure 7
a perspective view of the winch insert 6 , but viewed from the back.

In der nachfolgenden Beschreibung sind in unterschiedlichen Figuren gleiche Teile stets mit denselben Bezugszeichen versehen.In the following description, the same parts are always provided with the same reference symbols in different figures.

In Fig. 1 ist in einer perspektivischen Schrägansicht der Aufbau einer Drahtumformmaschine in Form einer Federwindemaschine 1 (nur ganz prinzipiell) gezeigt.In 1 is shown in a perspective oblique view of the structure of a wire forming machine in the form of a spring coiling machine 1 (only in principle).

Diese weist ein in der Zeichnung nur angedeutetes Maschinengestell 2 auf, an dessen Vorderseite ein Drahteinzug 3 angebracht ist, der aus mehreren nebeneinander angebrachten Paaren von Drahteinzugswalzen 4 gebildet wird. Über diese wird ein endloser Draht 5 einer Drahtführung 6 zugefördert und durch diese hindurch in eine Windestation 7 vorgeschoben.This has a machine frame 2, which is only indicated in the drawing, and on the front side of which a wire feeder 3 is attached, which is formed from several pairs of wire feeder rollers 4 arranged next to one another. An endless wire 5 is conveyed to a wire guide 6 via this and advanced through it into a winding station 7 .

An der Windestation 7 sind, übereinander angeordnet, zwei Windeeinheiten 7a und 7b vorgesehen, wobei auch noch eine (in Fig. 1 allerdings nicht gezeigte) Steigungseinrichtung vorhanden sein kann.At the winding station 7, two winding units 7a and 7b are arranged one above the other, one (in 1 although not shown) incline device may be present.

Das Einziehen des Drahtes 5 durch den Drahteinzug 3 über die Drahteinzugswalzen 4 erfolgt über einen (in Fig. 1 nicht dargestellten) programmgesteuerten Servomotor.The wire 5 is drawn in through the wire feed 3 via the wire feed rollers 4 via a (in 1 not shown) program-controlled servo motor.

Die Federwindemaschine 1 gemäß Fig. 1 ist ferner mit einer Schneideinheit 8 versehen, die mit einem beweglichen Schneidwerkzeug 9 arbeitet, das beim Schneidvorgang mit einem Schneiddorn 10 zusammenwirkt.The spring coiling machine 1 according to 1 is further provided with a cutting unit 8, which works with a movable cutting tool 9, which cooperates with a cutting mandrel 10 during the cutting process.

Jede Windeeinheit 7a, 7b ist mit einem Windewerkzeug 11 versehen, das, wie die Fig. 1 zeigt, jeweils an einem Hebel 12a bzw. 12b angebracht ist.Each winding unit 7a, 7b is provided with a winding tool 11 which, like the 1 shows, is attached to a lever 12a and 12b, respectively.

Jeder dieser Hebel 12a, 12b wird seinerseits über eine zugeordnete Steuerkurve 14a bzw. 14b unter Zwischenschaltung jeweils einer auf der entsprechenden Steuerkurve geführten Rolle 13a bzw. 13b bewegt, wobei jede der Steuerkurven 14a bzw. 14b von einem eigenen programmgesteuerten Servomotor angetrieben wird. Dabei erfolgt der Antrieb der Steuerkurven 14a, 14b intermittierend sowohl vorwärts, wie auch rückwärts drehend.Each of these levers 12a, 12b is in turn moved via an associated cam 14a or 14b with the interposition of a roller 13a or 13b guided on the corresponding cam, with each of the cams 14a or 14b being driven by its own program-controlled servomotor. The control cams 14a, 14b are driven intermittently both forwards and backwards.

In Fig. 2 ist ein Windewerkzeug 11 in perspektivischer Darstellung und in Fig. 3 dasselbe Windewerkzeug in einer Explosionsdarstellung gezeigt. Auf diese Figuren wird zunächst Bezug genommen.In 2 is a winding tool 11 in a perspective view and in 3 the same winding tool shown in an exploded view. Reference is first made to these figures.

Wie aus den Fig. 2 und 3 hervorgeht, umfaßt das Windewerkzeug 11 zunächst einen länglichen Werkzeughalter 15, der an seinem vorderen Endbereich (in den Fig. 2 und 3: obenliegenden Endbereich), der im montierten Zustand dem Draht 5 zugewendet ist, eine im wesentlichen ebene Auflagefläche 16 aufweist, die an ihrem dem vorderen Endbereich gegenüberliegenden Bereich von einer kreisabschnittförmig verlaufenden Stützstufe 17 begrenzt wird. Diese Auflagefläche 16 ist zum vorderen Ende des Werkzeughalters 15 hin offen (vgl. Fig. 3), wobei bei montiertem Windeeinsatz 18 dieser am vorderen Ende des Werkzeughalters 15 über diesen nach vorne hin übersteht (siehe Fig. 2).How from the Figures 2 and 3 As can be seen, the winding tool 11 first comprises an elongate tool holder 15 which, at its front end region (into the Figures 2 and 3 : upper end area), which faces the wire 5 in the mounted state, has a substantially flat bearing surface 16, which is delimited at its area opposite the front end area by a support step 17 running in the shape of a segment of a circle. This support surface 16 is open towards the front end of the tool holder 15 (cf. 3 ), whereby when the winch insert 18 is mounted, it protrudes forwards at the front end of the tool holder 15 (see 2 ).

Zur Montage wird der Windeeinsatz 18 auf der Auflagefläche 16 über eine zentrale Befestigungsschraube 19 fixiert, die in eine Gewindebohrung 20, welche zentral in der Auflagefläche 16 des Werkzeughalters 15 angebracht ist, eingeschraubt ist.For assembly, the winding insert 18 is fixed on the bearing surface 16 via a central fastening screw 19 which is screwed into a threaded hole 20 which is arranged centrally in the bearing surface 16 of the tool holder 15 .

Der Windeeinsatz 18 umfaßt, wie die Fig. 2 und 3 zeigen, einen unteren (d. h. der Auflagefläche 16 zugewandten) zylindrischen Sockel 21, an den sich axial unmittelbar (und auf der der Auflagefläche 16 abgewandten Seite des zylindrischen Sockels 21) ein Windekörper 22 anschließt.The winding insert 18 includes, like the Figures 2 and 3 show, a lower (ie the bearing surface 16 facing) cylindrical base 21, which is axially directly (and on the bearing surface 16 facing away from the cylindrical base 21) a winding body 22 connects.

Dieser Windekörper 22 ist an seinem Umfang mit einer umlaufenden Winderille 23 versehen, gegen die der angeförderte Draht 5 bei Betrieb anläuft und von ihr auf eine Kreisbahn abgelenkt sowie in Schraubenform umgeformt wird.This winding body 22 is provided on its circumference with a circumferential winding groove 23 against which the conveyed wire 5 runs during operation and is deflected by it onto a circular path and formed into a helical shape.

An der Unterseite des zylindrischen Sockels 21 sind bei dieser Ausführungsform des Windekörpers 22 radial nach außen verlaufende Nuten 24 eingelassen, wie dies am besten aus der Darstellung der Fig. 5 erkennbar ist, wobei die Figuren 4 und 5 noch einmal in Einzeldarstellung einen Windekörper 22 in kreisrunder Form zeigen (nämlich Fig. 4: Perspektivdarstellung der Vorderseite, und Fig. 5: Perspektivdarstellung der Rückseite).On the underside of the cylindrical base 21 22 radially outwardly extending grooves 24 are embedded in this embodiment of the winding body, as is best seen from the representation of FIG figure 5 is recognizable, with the Figures 4 and 5 once again show a winding body 22 in a circular shape in an individual representation (namely 4 : perspective view of the front, and figure 5 : perspective view of the back).

Wie aus Fig. 3 entnehmbar ist, ist senkrecht zur Längserstreckung des Werkzeughalters 15 in dessen Auflagefläche 16, und zwar durch die Gewindebohrung 20 hindurchlaufend, eine geradlinig verlaufende Aufnahmenut 25 angebracht, in der zwei Paßfedern 26, und zwar jede auf einer Seite der Gewindebohrung 20 am dortigen Ende der Aufnahmenut 25, eingesetzt und jeweils über eine Befestigungsschraube 27 in der Nut 25 befestigt werden. Dabei ist die Tiefe der Aufnahmenut 25 so gewählt, daß die dort eingesetzten Paßfedern 26 im montierten Zustand auf der offenen Oberseite der Aufnahmenut 25 überstehen und bei montiertem Windekörper 22 jeweils in eine der dort angebrachten, radial-sternenförmig nach außen verlaufenden Nuten 24 hineinragen, wodurch eine drehfeste Verbindung des Windekörpers 22 mit dem Werkzeughalter 15 geschaffen wird.How out 3 can be removed, perpendicular to the longitudinal extent of the tool holder 15 in its support surface 16, and running through the threaded bore 20, a straight receiving groove 25 is attached, in which two feather keys 26, each on one side of the threaded bore 20 at the end of the receiving groove there 25, are used and fastened in each case via a fastening screw 27 in the groove 25. The depth of the receiving groove 25 is selected so that the feather keys 26 inserted there protrude in the assembled state on the open upper side of the receiving groove 25 and, when the winch body 22 is assembled, protrude into one of the radially star-shaped outwardly extending grooves 24, whereby a non-rotatable connection of the winding body 22 to the tool holder 15 is created.

Wenn im laufenden Betrieb der Federwindemaschine 1 bei einem solchen Windewerkzeug 11 ein Verschließ oder gar ein Bruch des Windeeinsatzes 18 auftritt, ist es nur erforderlich, die Befestigungsschraube 19 für den Windeeinsatz 18 soweit zu lockern, daß der Windeeinsatz 18 axial von der Auflagefläche 16 angehoben werden kann, bis die Nuten 24 außer Eingriff mit den Paßfedern 26 gelangen, wonach der Windeeinsatz 18 gedreht wird, bis die nachfolgende Nut 24 auf der Unterseite des zylindrischen Sockels 21 über den Paßfedern 26 liegt. Anschließend kann der Windeeinsatz 18 wieder axial zur Auflagefläche 16 hin verschoben werden, wobei die Paßfedern 26 nunmehr in die neue, über ihnen liegende Nut 24 an der Unterseite des zylindrischen Sockels 21 eingreifen können. Hiernach muß nur noch die Befestigungsschraube 19 gespannt werden und der Windeeinsatz 18 kann sogleich wieder benutzt werden.If during operation of the spring coiling machine 1 with such a coiling tool 11 the coil insert 18 becomes worn or even breaks, it is only necessary to loosen the fastening screw 19 for the coil insert 18 to such an extent that the coil insert 18 is lifted axially from the support surface 16 until the grooves 24 disengage the keys 26, after which the winding insert 18 is rotated until the following groove 24 on the underside of the cylindrical base 21 overlies the keys 26. Subsequently the winding insert 18 can again be displaced axially towards the bearing surface 16, with the feather keys 26 now being able to engage in the new groove 24 on the underside of the cylindrical base 21 lying above them. After this, only the fastening screw 19 has to be tightened and the winding insert 18 can be used again immediately.

Für die drehfeste Befestigung des Windeeinsatzes 18 am Werkzeughalter 15 können natürlich auch andere Maßnahmen als die, die in den Figuren 2 bis 5 gezeigt sind, eingesetzt werden. So besteht z. B. auch die Möglichkeit, eine andere Form einer geeigneten Rasterung an der Unterseite (d. h. der der Auflagefläche 16 des Werkzeughalters 15 zugewandten Seite) des zylindrischen Sockels 21 anzubringen und in der Auflagefläche 16 des Werkzeughalters 15 entsprechende Verrastungs-Gegenmittel vorzusehen. So kann eine Rasterung in Form einer Verzahnung vorgesehen werden, die mit entsprechend ausgebildeten Blockierelementen in der Auflagefläche 16 zusammenwirkt. Es muß in jedem Fall nur sichergestellt sein, daß die bewirkte Verrastung auch unschwer wieder aufgehoben werden kann, wenn der Windeeinsatz 18 am Werkezughalter 15 gewechselt oder bei einer Beschädigung wieder etwas gegenüber seiner bisherigen Lage verdreht werden soll.For the non-rotatable attachment of the winding insert 18 on the tool holder 15, of course, other measures than those in the Figures 2 to 5 are shown are used. So there is z. B. also the possibility of attaching another form of a suitable grid on the underside (ie the side facing the bearing surface 16 of the tool holder 15) of the cylindrical base 21 and in the bearing surface 16 of the tool holder 15 to provide corresponding locking countermeasures. Thus, a grid in the form of teeth can be provided, which interacts with correspondingly designed blocking elements in the bearing surface 16 . In any case, it must only be ensured that the latching effected can also be undone again without difficulty if the winding insert 18 on the tool holder 15 is to be changed or, in the event of damage, is to be rotated somewhat in relation to its previous position.

Für die Form des Windeeinsatzes 18 kann aber auch eine andere als die in den Figuren 2 bis 5 gezeigte Ausbildung als Winderolle 22 eingesetzt werden.For the shape of the winding insert 18 but can also be different than that in the Figures 2 to 5 Training shown can be used as a winding roller 22.

So zeigen die Fig. 6 und 7 (in Perspektivdarstellungen, die denen der Fig. 4 und 5 ähnlich sind) eine Ausbildung des Windeeinsatzes 18 mit einem Polygonkörper 28, der ebenfalls mit einer umlaufenden Winderille 23 versehen ist, wobei hier auf die zeichnerische Darstellung der Fig. 6 ausdrücklich als wesentlich verwiesen wird. In der dargestellten Ausführungsform handelt es sich bei dem Polygonkörper 28 um einen achteckigen Körper, wobei hier gleichermaßen auch ein zehneckiger oder zwölfeckiger oder auch nur sechseckiger Körper eingesetzt werden könnte.That's how they show Figures 6 and 7 (in perspective views similar to those of Figures 4 and 5 are similar) an embodiment of the winch insert 18 with a polygonal body 28, which is also provided with a circumferential winch groove 23, which here on the graphic representation of 6 expressly referred to as essential. In the illustrated embodiment, the polygonal body 28 is an octagonal body, although a decagonal or twelve-sided or even just a hexagonal body could also be used here.

Die Höhe H der Stützstufe 17 entspricht bei dem dargestellten Ausführungsbeispiel der axialen Länge h des zylindrischen Sockels 21, der damit in seinem auf der Auflagefläche 16 montierten Zustand somit über die ganze Höhe H der Stützstufe 17 bei Belastung abgestützt werden kann.In the exemplary embodiment shown, the height H of the support step 17 corresponds to the axial length h of the cylindrical base 21, which can thus be supported over the entire height H of the support step 17 under load when it is mounted on the bearing surface 16.

Der Windeeinsatz 18 kann aus jedem geeigneten Werkstoff hergestellt sein, wird aber bevorzugt aus Hartmetall, Werkzeugstahl, Keramik oder einem Faserverbundwerkstoff gefertigt.The winch insert 18 can be made of any suitable material, but is preferably made of hard metal, tool steel, ceramic or a fiber composite material.

Claims (10)

  1. Coiling tool (11) for a spring coiling machine (1), having a tool holder (15) and an interchangeable coiling insert (18) which is fastened to the tool holder (15), characterized in that the coiling insert (18) has a cylindrical base (21) and, axially alongside the latter, a coiling body (22, 28), wherein - in the assembled state - the cylindrical base (21) sits on a bearing surface (16) formed on the front end region of the tool holder (15) and bears, in its region on the opposite side from this front end region, against a supporting step (17) that delimits the bearing surface (16) there and extends in the form of a segment of a circle, and in that the coiling insert (18) is attached in a rotationally fixed manner and is fastened to the tool holder (15) via a central clamping means (19), and that a detent (24) that acts in the circumferential direction of the cylindrical base (21) is attached to that side of the latter that faces the bearing surface (16) of the tool holder (15), said detent (24) being assigned a corresponding counterpart latching element (26) on the bearing surface (16) of the tool holder (15).
  2. Coiling tool according to Claim 1, characterized in that a feather key (26) or a locking pin for attaching the coiling insert (18) in a rotationally fixed manner are provided on the tool holder (15).
  3. Coiling tool according to Claim 1 or 2, characterized in that the central clamping means is a screw (19), a bolt or a clamping claw.
  4. Coiling tool according to Claim 1, characterized in that the detent is provided in the form of a toothing.
  5. Coiling tool according to Claim 1, characterized in that the detent is configured in the form of radially extending grooves (24) in the cylindrical base (21), which cooperate with feather keys (26) or pins in the bearing surface (16) of the tool holder (15).
  6. Coiling tool according to one of Claims 1 to 5, characterized in that the height (H) of the supporting step (17) corresponds approximately to the axial length (h) of the cylindrical base (21).
  7. Coiling tool according to one of Claims 1 to 6, characterized in that the coiling body (22) is configured in a circular manner as a coiling roller.
  8. Coiling tool according to one of Claims 1 to 5, characterized in that the coiling body is configured in the form of a polygonal body (28).
  9. Coiling tool according to one of Claims 1 to 8, characterized in that the coiling body (22, 28) is provided at its circumference with an encircling channel (23) for wire guidance.
  10. Coiling tool according to one of Claims 1 to 9, characterized in that the coiling insert (18) consists of hard metal, tool steel, ceramic or a fibre-composite material.
EP17156349.7A 2016-03-31 2017-02-15 Coiling tool for spring coiling machine Active EP3225325B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016105935.8A DE102016105935B4 (en) 2016-03-31 2016-03-31 Winding tool for a spring winding machine

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EP3225325A1 EP3225325A1 (en) 2017-10-04
EP3225325B1 EP3225325B1 (en) 2018-09-12
EP3225325B2 true EP3225325B2 (en) 2022-03-09

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3698897B2 (en) 2019-02-21 2023-12-27 WTH Laqua GmbH Coiling tool for spring coiling machine
CN115673182B (en) * 2022-11-10 2024-06-04 常州泰瑞弹簧有限公司 Multifunctional spring coiling machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011100434A1 (en) † 2011-05-04 2012-11-08 Wafios Aktiengesellschaft Winding tool for spring winding machines
US20150040634A1 (en) † 2012-03-24 2015-02-12 Numalliance Bending machine having a bending head that is movable about a stationary bending shank

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US4387585A (en) 1981-01-13 1983-06-14 Torin Corporation Spring coiling machine with improved coil starter means
DE3701088A1 (en) 1987-01-16 1988-07-28 Baisch Gerhard Dipl Ing Fh WINCH DEVICE FOR SPRING WINCHES WITH REPLACEABLE, PRE-ADJUSTABLE ELEMENTS
CN2623377Y (en) * 2003-06-20 2004-07-07 中国重型汽车集团有限公司 Diameter adjusting mechanism of an automatic spring coiling machine
US7082797B1 (en) 2003-12-19 2006-08-01 Wiese Thomas R Coiling point tool for spring coiling machine, and method of using same
CN202021271U (en) * 2010-12-28 2011-11-02 四川川润股份有限公司 Multi-machine universal mold

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011100434A1 (en) † 2011-05-04 2012-11-08 Wafios Aktiengesellschaft Winding tool for spring winding machines
US20150040634A1 (en) † 2012-03-24 2015-02-12 Numalliance Bending machine having a bending head that is movable about a stationary bending shank

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CN107262632A (en) 2017-10-20
DE102016105935B4 (en) 2018-04-26
EP3225325B1 (en) 2018-09-12
EP3225325A1 (en) 2017-10-04
DE102016105935A1 (en) 2017-10-05

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