EP3225325B1 - Coiling tool for spring coiling machine - Google Patents

Coiling tool for spring coiling machine Download PDF

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Publication number
EP3225325B1
EP3225325B1 EP17156349.7A EP17156349A EP3225325B1 EP 3225325 B1 EP3225325 B1 EP 3225325B1 EP 17156349 A EP17156349 A EP 17156349A EP 3225325 B1 EP3225325 B1 EP 3225325B1
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EP
European Patent Office
Prior art keywords
coiling
tool
tool holder
tool according
insert
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EP17156349.7A
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German (de)
French (fr)
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EP3225325B2 (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 winding tool for a spring coiling machine, with a tool holder and a removable wind insert, which is attached to the tool holder.
  • the wire coming from a wire retraction is advanced against one or two wind fingers or against wind pins, deflected by this on a circular path and shaped as a spring.
  • the EP 2 520 384 A1 describes a wind tool and forms the basis for the preamble of claim 1.
  • a winch insert is used, which is exchangeably and adjustably mounted in a tool holder and held there with a Pratzenan für us.
  • different alignments and positions of the winch insert can be adjusted via a large number of adjusting screws.
  • this known tool however, there is a large number of different, partly rotatable individual elements, which is rather complicated in the overall arrangement and requires a relatively large amount of space.
  • the US Pat. No. 7,082,797 B1 describes a wind tool, in which the winch insert is inserted into a recessed receptacle corresponding to its shape in the front end region of the tool holder and fastened there by means of a screw.
  • the tool holder is provided at its front end, where the winch insert protrudes from it, with a lateral broadening, which leads to that z. B.
  • two such tools can not be very closely placed side by side or moved together.
  • Windewerkzeug the winch insert attached to the tool holder, if it can not be used further due to wear, must be replaced, which is relatively expensive.
  • a Windewerkzeug of the type mentioned is in the spring coiling machine from the US 4,387,585 used. It consists of a freely rotatable roller, which is attached to a tool holder and against which the conveyed wire starts for deflection. Such winders are preferably used in large machines in which a considerable friction between the tool and the workpiece occurs. However, it is necessary to use for the rotatable mounting of the Winderolle fitting screws, bearings, seals and lubrication, which is considerably expensive. In the case of wear on the Winderolle or other damage, the Winderolle must be replaced, which means a significant installation effort and is costly.
  • the present invention seeks to propose a wind tool of the type mentioned, which is the same quickly reusable in the event of wear or breakage of the use of the wind without a change.
  • the winch insert comprises a cylindrical base and, axially adjacent to this, a wind body, wherein mounted in the assembled state of the cylindrical base is rotatably mounted on a formed on the front end portion of the tool holder support surface, and At its front end region opposite this area abuts against a support section which defines the support surface there, extending in the manner of a circular segment, and in that the winch insert is fastened to the tool holder via a central tensioning means.
  • the winding tool according to the invention When installed in the spring-winding machine, the winding tool according to the invention is set up once with respect to its axial position. Thereafter, the position and position of the Windewerkmaschines no longer needs to be changed, since even in the event of wear, breakage of the use of wind o. ⁇ . Only the central clamping something solved, then the use of wind a bit further rotated and then the clamping means are tightened again got to. This is made possible by the non-rotatable attachment of the winch insert to the tool holder, through which, unlike a rotatable roller, occurring wear, breakage o. ⁇ . During winding only at the point where the wire starts against the winch insert can occur.
  • the winch insert which is mounted non-rotatably on the tool holder, with its the front of the tool holder (and thus the point of contact of the wire to be twisted) back facing away from the supporting step, which is formed on the tool holder, from, so that on the forces acting on the winch are not (or only to a small extent) to be absorbed by the central tensioning means, the essential part of the forces to be absorbed being supported by the supporting step.
  • a further preferred embodiment of the invention consists in the fact that on the side facing the support surface of the tool holder, an effective in the circumferential direction screening is attached to the bearing surface of the tool holder associated with a corresponding latching counter element and mounted so that it a rapid solution of a lock for a quick further rotation of the winch use on the tool holder with a subsequent reclosing allowed.
  • such a grid in the form of a circumferential toothing or in the form of radially extending grooves may be formed on the winch insert, which cooperate with appropriate counter-elements, such as with feather keys or with pins in the support surface of the tool holder form fit.
  • the height of the support step approximately corresponds to the axial thickness of the cylindrical base, so that the peripheral surface of the support base is available in its entire height locally for the transmission of the two forces acting locally.
  • the wind body present axially next to the support base can be provided in any suitable form, but is particularly preferably designed to be circular or else in the form of a polygonal body. Wind body and support base are preferably integrally molded.
  • the wind body is provided at its periphery with a circumferential groove for wire guidance.
  • the winch insert preferably consists of hard metal, tool steel, ceramic or a fiber composite material.
  • Fig. 1 is a perspective oblique view of the structure of a wire forming machine in the form of a spring coiling machine 1 (only in principle) shown.
  • two wind units 7a and 7b are arranged one above the other, wherein one (in Fig. 1 but not shown) slope device may be present.
  • the spring coiling machine 1 according to Fig. 1 is further provided with a cutting unit 8, which operates with a movable cutting tool 9, which cooperates with a cutting mandrel 10 during the cutting process.
  • Each winch unit 7a, 7b is provided with a wind tool 11, which, like the Fig. 1 shows, each attached to a lever 12a and 12b.
  • Each of these levers 12a, 12b is in turn moved via an associated control cam 14a or 14b with the interposition of a respective guided on the corresponding control cam roller 13a and 13b, wherein each of the control cams 14a and 14b is driven by its own programmable servo motor.
  • the drive of the control cams 14a, 14b takes place intermittently both forward, as well as turning backwards.
  • Fig. 2 is a Windewerkmaschine 11 in perspective and in Fig. 3 the same wind tool shown in an exploded view. At first reference will be made to these figures.
  • the Windewerkmaschine 11 first comprises an elongated tool holder 15 which at its front end portion (in the FIGS. 2 and 3 : overhead End region), which is facing the wire 5 in the mounted state, has a substantially flat support surface 16 which is bounded at its front end region opposite the region of a circular section extending support step 17.
  • This support surface 16 is open towards the front end of the tool holder 15 (see. Fig. 3 ), with mounted wind insert 18 this at the front end of the tool holder 15 projects beyond this forward (see Fig. 2 ).
  • the winch insert 18 For mounting the winch insert 18 is fixed on the support surface 16 via a central fastening screw 19, which is screwed into a threaded bore 20 which is centrally mounted in the support surface 16 of the tool holder 15.
  • the winch insert 18 includes, like the FIGS. 2 and 3 show a lower (ie the support surface 16 facing) cylindrical base 21, to the axially directly (and on the side facing away from the support surface 16 of the cylindrical base 21), a wind body 22 connects.
  • This wind body 22 is provided at its periphery with a circumferential Winderille 23, against which the conveyed wire 5 starts in operation and is deflected by her to a circular path and formed into a helical shape.
  • FIGS. 4 and 5 once again in a single representation show a wind body 22 in a circular form (namely Fig. 4 : Perspective view of the front, and Fig. 5 : Perspective view of the back).
  • Fig. 3 How out Fig. 3 can be removed is perpendicular to the longitudinal extension of the tool holder 15 in the support surface 16, passing through the threaded bore 20, a rectilinear groove 25 mounted in the two parallel keys 26, each on one side of the threaded bore 20 at the local end of the receiving groove 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 chosen so that the passport springs 26 used there in the mounted state on the open top of the receiving groove 25 protrude and protrude when mounted wind body 22 each in one of the attached there, radially star-shaped outwardly extending grooves 24, thereby a rotationally fixed connection of the wind body 22 with the tool holder 15 is created.
  • Winderolle 22 For the shape of the wind insert 18 but also other than in the FIGS. 2 to 5 training shown as a Winderolle 22 are used.
  • the winch insert 18 with a polygonal body 28, which is also provided with a circumferential Winderille 23, in which case the drawing of the Fig. 6 expressly referred to as essential.
  • the polygon body 28 is an octagonal body, and here as well a toe-cornered or dodecagonal or even hexagonal body could be used.
  • the height H of the support stage 17 corresponds in the illustrated embodiment, the axial length h of the cylindrical base 21, the thus in its on the support surface 16th assembled state can thus be supported over the entire height H of the support level 17 under load.
  • the winch insert 18 may be made of any suitable material, but is preferably made of cemented carbide, tool steel, ceramic or a fiber composite.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Springs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Wind Motors (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 winding tool for a spring coiling machine, with a tool holder and a removable wind insert, which 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-winding machines for which the wind-up tool according to the invention can be used, the wire coming from a wire retraction is advanced against one or two wind fingers or against wind pins, deflected by this on a circular path and shaped 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 wind tools used, there are those in which the tool holder and the winch insert are made in one piece or the winch is soldered into the tool holder. The EP 2 520 384 A1 describes a wind tool and forms the basis for the preamble of claim 1. In the EP 0 344 178 B1 a Windewerkzeug is described in which a winch insert is used, which is exchangeably and adjustably mounted in a tool holder and held there with a Pratzenanordnung. In this case, different alignments and positions of the winch insert can be adjusted via a large number of adjusting screws. In this known tool, however, there is a large number of different, partly rotatable individual elements, which is rather 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 US Pat. No. 7,082,797 B1 describes a wind tool, in which the winch insert is inserted into a recessed receptacle corresponding to its shape in the front end region of the tool holder and fastened there by means of a screw. In this case, the tool holder is provided at its front end, where the winch insert protrudes from it, with a lateral broadening, which leads to that z. B. in the case of a two-finger wind system, two such tools can not be very closely placed side by side or moved together. In this known Windewerkzeug the winch insert attached to the tool holder, if it can not be used further due to wear, must be replaced, 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 Windewerkzeug of the type mentioned is in the spring coiling machine from the US 4,387,585 used. It consists of a freely rotatable roller, which is attached to a tool holder and against which the conveyed wire starts for deflection. Such winders are preferably used in large machines in which a considerable friction between the tool and the workpiece occurs. However, it is necessary to use for the rotatable mounting of the Winderolle fitting screws, bearings, seals and lubrication, which is considerably expensive. In the case of wear on the Winderolle or other damage, the Winderolle must be replaced, which means a significant 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 present invention seeks to propose a wind tool of the type mentioned, which is the same quickly reusable in the event of wear or breakage of the use of the wind without a change.

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.According to the invention this is achieved in a wind tool of the type mentioned in that the winch insert comprises a cylindrical base and, axially adjacent to this, a wind body, wherein mounted in the assembled state of the cylindrical base is rotatably mounted on a formed on the front end portion of the tool holder support surface, and At its front end region opposite this area abuts against a support section which defines the support surface there, extending in the manner of a circular segment, and in that the winch insert is fastened to the tool holder via a central tensioning means.

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.When installed in the spring-winding machine, the winding tool according to the invention is set up once with respect to its axial position. Thereafter, the position and position of the Windewerkzeugs no longer needs to be changed, since even in the event of wear, breakage of the use of wind o. Ä. Only the central clamping something solved, then the use of wind a bit further rotated and then the clamping means are tightened again got to. This is made possible by the non-rotatable attachment of the winch insert to the tool holder, through which, unlike a rotatable roller, occurring wear, breakage o. Ä. During winding only at the point where the wire starts against the winch insert can occur. If by loosening the clamping means and by rotating the winch insert a new, undamaged portion of the latter spent at the point of contact of the wire, which can be carried out very quickly by a small rotation of the winch insert, then it is not only a brief interruption in labor input of the spring coiling machine but the winch use can also be pretty are often rotated further in this way, resulting in a particularly good utilization of the wind tool and thus to a saving of tooling 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 work cycle of the spring coiling machine, the winch insert, which is mounted non-rotatably on the tool holder, with its the front of the tool holder (and thus the point of contact of the wire to be twisted) back facing away from the supporting step, which is formed on the tool holder, from, so that on the forces acting on the winch are not (or only to a small extent) to be absorbed by the central tensioning means, the essential part of the forces to be absorbed being supported by the supporting step.

Auch können bei dem erfindungsgemäßen Windewerkzeug bei einem gleichen Werkzeughalter unterschiedliche Windeeinsätze für z. B. unterschiedliche Drahtdurchmesser eingesetzt und rasch ausgetauscht werden.Also, in the wind tool according to the invention with a same tool holder different wind inserts for z. B. different wire diameter used and replaced quickly.

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 rotationally fixed installation of the winch insert on the tool holder all known to a person skilled, this purposeful measures can be provided. Most preferably, however, one (or more) parallel key (s) or one (or more) locking pin (s), preferably embedded in the support surface on the tool holder, provided for non-rotatably mounting 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 tensioning means for fastening the winch insert to the tool holder, but it is particularly advantageous if a screw or a bolt or a clamping claw is used for this purpose. The use of a quick release can be equally advantageous.

Eine weitere bevorzugte Ausgestaltung der Erfindung besteht auch darin, 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 und so angebracht ist, daß es eine rasche Lösung einer Verrastung für ein schnelles Weiterdrehen des Windeeinsatzes auf dem Werkzeughalter mit einer anschließenden Wiederverrastung gestattet.A further preferred embodiment of the invention consists in the fact that on the side facing the support surface of the tool holder, an effective in the circumferential direction screening is attached to the bearing surface of the tool holder associated with a corresponding latching counter element and mounted so that it a rapid solution of a lock for a quick further rotation of the winch use on the tool holder with a subsequent reclosing allowed.

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 in the form of a circumferential toothing or in the form of radially extending grooves may be formed on the winch insert, which cooperate with appropriate counter-elements, such as with feather keys or with pins in the support surface of the tool holder form fit.

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.It is further preferred if the height of the support step approximately corresponds to the axial thickness of the cylindrical base, so that the peripheral surface of the support base is available in its entire height locally for the transmission of the two forces acting locally.

Der axial neben dem Stützsockel vorliegende Windekörper kann in jeder geeigneten Form vorgesehen sein, wird aber besonders bevorzugt kreisförmig oder auch in Form eines Polygonkörpers ausgebildet. Dabei sind Windekörper und Stützsockel bevorzugt einteilig geformt.The wind body present axially next to the support base can be provided in any suitable form, but is particularly preferably designed to be circular or else in the form of a polygonal body. Wind body and support base are preferably integrally molded.

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

Vorzugsweise besteht bei dem erfindungsgemäßen Windewerkzeug der Windeeinsatz aus Hartmetall, Werkzeugstahl, Keramik oder einem Faserverbundwerkstoff.In the wind tool according to the invention, the winch insert preferably consists 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 will be explained in more detail by way of example with reference to the drawing in principle. Show it:
Fig. 1
a very principal perspective front view of a spring coiling machine with two Windefingern each with a Windewerkzeug invention;
Fig. 2
a perspective view of a Windewerkzeuges invention;
Fig. 3
a perspective view of the Windewerkzeugs Fig. 2 but in a disassembled state;
Fig. 4
a perspective view of a winch insert in a windmill according to the invention, seen from the front side thereof;
Fig. 5
a perspective view of the winch use Fig. 4 but seen from its axial back;
Fig. 6
a perspective view of another embodiment of a winch insert in a windmill according to the invention, as seen on the front, as well as
Fig. 7
a perspective view of the winch use Fig. 6 but seen on 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 numerals 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 Fig. 1 is a perspective oblique view of the structure of a wire forming machine in the form of a spring coiling machine 1 (only in principle) shown.

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 in the drawing only indicated machine frame 2, on the front side of a wire feed 3 is mounted, which is formed of a plurality of juxtaposed pairs of wire feed rollers 4. About this an endless wire 5 a wire guide 6 is conveyed and advanced through this into a wind 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 wind station 7, two wind units 7a and 7b are arranged one above the other, wherein one (in Fig. 1 but not shown) slope 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 drawing of the wire 5 through the wire feed 3 via the wire feed rollers 4 via a (in Fig. 1 not shown) program-controlled servomotor.

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 Fig. 1 is further provided with a cutting unit 8, which operates 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 winch unit 7a, 7b is provided with a wind tool 11, which, like the Fig. 1 shows, each attached to a lever 12a and 12b.

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 control cam 14a or 14b with the interposition of a respective guided on the corresponding control cam roller 13a and 13b, wherein each of the control cams 14a and 14b is driven by its own programmable servo motor. In this case, the drive of the control cams 14a, 14b takes place intermittently both forward, as well as turning 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 Fig. 2 is a Windewerkzeug 11 in perspective and in Fig. 3 the same wind tool shown in an exploded view. At first reference will be 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).Like from the FIGS. 2 and 3 shows, the Windewerkzeug 11 first comprises an elongated tool holder 15 which at its front end portion (in the FIGS. 2 and 3 : overhead End region), which is facing the wire 5 in the mounted state, has a substantially flat support surface 16 which is bounded at its front end region opposite the region of a circular section extending support step 17. This support surface 16 is open towards the front end of the tool holder 15 (see. Fig. 3 ), with mounted wind insert 18 this at the front end of the tool holder 15 projects beyond this forward (see Fig. 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 mounting the winch insert 18 is fixed on the support surface 16 via a central fastening screw 19, which is screwed into a threaded bore 20 which is centrally mounted in the support 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 winch insert 18 includes, like the FIGS. 2 and 3 show a lower (ie the support surface 16 facing) cylindrical base 21, to the axially directly (and on the side facing away from the support surface 16 of the cylindrical base 21), a wind 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 wind body 22 is provided at its periphery with a circumferential Winderille 23, against which the conveyed wire 5 starts in operation and is deflected by her to 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).At the bottom of the cylindrical base 21 22 radially outwardly extending grooves 24 are recessed in this embodiment of the wind body, as best seen in the illustration of Fig. 5 is recognizable, wherein the FIGS. 4 and 5 once again in a single representation show a wind body 22 in a circular form (namely Fig. 4 : Perspective view of the front, and Fig. 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 Fig. 3 can be removed is perpendicular to the longitudinal extension of the tool holder 15 in the support surface 16, passing through the threaded bore 20, a rectilinear groove 25 mounted in the two parallel keys 26, each on one side of the threaded bore 20 at the local end of the receiving groove 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 chosen so that the passport springs 26 used there in the mounted state on the open top of the receiving groove 25 protrude and protrude when mounted wind body 22 each in one of the attached there, radially star-shaped outwardly extending grooves 24, thereby a rotationally fixed connection of the wind body 22 with 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 a closure or even a breakage of the winch insert 18 occurs during operation of the spring coiling machine 1 in such a winding tool 11, it is only necessary to loosen the fastening screw 19 for the winch insert 18 so far that the winch insert 18 is lifted axially from the supporting surface 16 until the grooves 24 disengage from the feather keys 26, after which the winch insert 18 is rotated until the subsequent groove 24 on the underside of the cylindrical base 21 overlies the feather keys 26. Subsequently, the winch insert 18 can again be displaced axially to the support surface 16, wherein the feather keys 26 can now engage in the new groove 24 located above them on the underside of the cylindrical base 21. After this, only the fixing screw 19 has to be tensioned and the winch 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 rotationally fixed attachment of the winch insert 18 on the tool holder 15, of course, other measures than those in the FIGS. 2 to 5 are shown used. So there is z. As well as the possibility of another form of a suitable grid on the bottom (ie, the support surface 16 of the tool holder 15 side facing) of the cylindrical base 21 and provide 15 in the support surface 16 of the tool holder corresponding Verrastungs antidote. Thus, a grid in the form of a toothing can be provided, which cooperates with appropriately designed blocking elements in the support surface 16. It must be ensured in any case, only that the effected latching can easily be reversed when the winch insert 18 is changed on the tool holder 15 or in case of damage again something is to be rotated relative 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 wind insert 18 but also other than in the FIGS. 2 to 5 training shown as a Winderolle 22 are used.

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.So show the 6 and 7 (in perspective views, those of the 4 and 5 similar) are an embodiment of the winch insert 18 with a polygonal body 28, which is also provided with a circumferential Winderille 23, in which case the drawing of the Fig. 6 expressly referred to as essential. In the illustrated embodiment, the polygon body 28 is an octagonal body, and here as well a toe-cornered or dodecagonal or even hexagonal body could be used.

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.The height H of the support stage 17 corresponds in the illustrated embodiment, the axial length h of the cylindrical base 21, the thus in its on the support surface 16th assembled state can thus be supported over the entire height H of the support level 17 under load.

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 may be made of any suitable material, but is preferably made of cemented carbide, tool steel, ceramic or a fiber composite.

Claims (11)

  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).
  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 one of Claims 1 to 3, characterized in 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).
  5. Coiling tool according to Claim 4, characterized in that the detent is provided in the form of a toothing.
  6. Coiling tool according to Claim 4, 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).
  7. Coiling tool according to one of Claims 1 to 6, characterized in that the height (H) of the supporting step (17) corresponds approximately to the axial length (h) of the cylindrical base (21).
  8. Coiling tool according to one of Claims 1 to 7, characterized in that the coiling body (22) is configured in a circular manner.
  9. Coiling tool according to one of Claims 1 to 6, characterized in that the coiling body is configured in the form of a polygonal body (28).
  10. Coiling tool according to one of Claims 1 to 9, characterized in that the coiling body (22, 28) is provided at its circumference with an encircling channel (23) for wire guidance.
  11. Coiling tool according to one of Claims 1 to 10, 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 true EP3225325B1 (en) 2018-09-12
EP3225325B2 EP3225325B2 (en) 2022-03-09

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CN (1) CN107262632A (en)
DE (1) DE102016105935B4 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3698897A1 (en) 2019-02-21 2020-08-26 WTH Laqua GmbH Coiling tool for spring coiling machine

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN115673182B (en) * 2022-11-10 2024-06-04 常州泰瑞弹簧有限公司 Multifunctional spring coiling machine

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US4387585A (en) 1981-01-13 1983-06-14 Torin Corporation Spring coiling machine with improved coil starter means
EP0344178B1 (en) 1987-01-16 1991-07-03 Gerhard Baisch Winding device for spring winding machines with exchangeable, preadjustable elements
US7082797B1 (en) 2003-12-19 2006-08-01 Wiese Thomas R Coiling point tool for spring coiling machine, and method of using same
DE102011100434B4 (en) 2011-05-04 2014-11-20 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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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
CN202021271U (en) * 2010-12-28 2011-11-02 四川川润股份有限公司 Multi-machine universal mold

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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
EP0344178B1 (en) 1987-01-16 1991-07-03 Gerhard Baisch Winding device for spring winding machines with exchangeable, preadjustable elements
US7082797B1 (en) 2003-12-19 2006-08-01 Wiese Thomas R Coiling point tool for spring coiling machine, and method of using same
DE102011100434B4 (en) 2011-05-04 2014-11-20 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3698897A1 (en) 2019-02-21 2020-08-26 WTH Laqua GmbH Coiling tool for spring coiling machine
EP3698897B1 (en) 2019-02-21 2021-03-10 WTH Laqua GmbH Coiling tool for spring coiling machine

Also Published As

Publication number Publication date
EP3225325B2 (en) 2022-03-09
EP3225325A1 (en) 2017-10-04
DE102016105935A1 (en) 2017-10-05
DE102016105935B4 (en) 2018-04-26
CN107262632A (en) 2017-10-20

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