EP2669050B1 - Tool, system and method for the screwing of helical compression springs to a screw plate spring - Google Patents

Tool, system and method for the screwing of helical compression springs to a screw plate spring Download PDF

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Publication number
EP2669050B1
EP2669050B1 EP13169751.8A EP13169751A EP2669050B1 EP 2669050 B1 EP2669050 B1 EP 2669050B1 EP 13169751 A EP13169751 A EP 13169751A EP 2669050 B1 EP2669050 B1 EP 2669050B1
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EP
European Patent Office
Prior art keywords
tool
helical compression
fixed
mandrel
compression springs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13169751.8A
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German (de)
French (fr)
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EP2669050A2 (en
EP2669050A3 (en
Inventor
Philipp Koepff
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Dr Werner Rohrs & Co KG GmbH
Original Assignee
Dr Werner Rohrs & Co KG GmbH
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Application filed by Dr Werner Rohrs & Co KG GmbH filed Critical Dr Werner Rohrs & Co KG GmbH
Priority to PL13169751T priority Critical patent/PL2669050T3/en
Priority to SI201331040T priority patent/SI2669050T1/en
Priority to RS20180612A priority patent/RS57276B1/en
Publication of EP2669050A2 publication Critical patent/EP2669050A2/en
Publication of EP2669050A3 publication Critical patent/EP2669050A3/en
Application granted granted Critical
Publication of EP2669050B1 publication Critical patent/EP2669050B1/en
Priority to HRP20180857TT priority patent/HRP20180857T1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • B25B27/302—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs
    • B25B27/304—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs by compressing coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F35/00—Making springs from wire
    • B21F35/006—Double twist coil springs

Definitions

  • the present invention relates to a tool, system and method for bolting helical compression springs to a helical spring.
  • a nose-loaded clip for retaining a spring end on a mandrel of coil spring winding machines.
  • the nose is fixed to a rotatable ring, which is arranged eccentrically to the mandrel.
  • the nose is moved closer to the mandrel at the beginning of the rotational movement of the mandrel and a constantly increasing pressure on the clamped spring end are exerted by the nose, so that only a short, not protruding over the nose piece of spring needs to be clamped.
  • a device for winding springs on a rotating mandrel emerges.
  • a disc is adjustably mounted and is designed such that it at its periphery from a minimum up to having a maximum changing thickness.
  • the device can be applied to the rotating mandrel such that the thickness of the disc at the point of contact with the mandrel corresponds to the desired spacing of the turns of the spring to be produced.
  • the disc is then applied to the last turn of the wire on the mandrel, so that the wire runs exactly at the desired distance from this on the mandrel.
  • This coil spring set comprises two coil springs, which are wound from a spring band edgewise to the spring axis, with a longer cross-sectional side of the spring band having an angle smaller than 90 ° to the spring axis. These two coil springs are screwed together with oppositely directed oblique position of the cross sections.
  • This coil spring comprises at least one attached to one end of the spring body support member.
  • the support member and the spring body are integrally formed, wherein the spring body is made by dissolving material between the turns.
  • This device has a drive spindle in which a mandrel is arranged. About a guide assembly, a wire is applied to the mandrel, said wire is wound by the rotational movement of the drive spindle to form a coil spring on the mandrel.
  • a single bending tool of the tool kit comprises a cylindrical tool holder, on the front side of a mandrel element is arranged. On the front side of the mandrel element, a bending mandrel is formed. Furthermore, the bending tool is a bending element with a Formbacke provided which has a shaping groove for pressing a strand-shaped workpiece when bending against the bending mandrel.
  • the form grooves of different mold jaws are designed for different workpiece cross sections.
  • a device for biasing Garagentorfedern out is provided to arrange a spring on a cylindrical, mandrel-like body and fix one end of the spring with a corresponding, associated with the mandrel receptacle fixed.
  • the other free end of the spring is connected to a ratchet mechanism of the device. By operating the ratchet mechanism, the spring can be correspondingly biased and used in a corresponding mechanism of a garage door.
  • disc springs In the production here are the high material and labor costs to call. Disc springs in the application have the disadvantage that assembly and maintenance are time-consuming due to the many individual plates. In addition, the unfavorable fiber shape of the material promotes the occurrence of fractures.
  • wound helical plate springs have been developed. These can in many cases replace oppositely stacked disc spring columns.
  • the helical spring is a one-piece spring element, which consists of two identical, screwed together helical compression springs, each of which is wound from strip steel with plate spring-like cross section upright and obliquely to the central axis.
  • screw-spring springs do not disintegrate into single plates, they have the advantage that they can be delivered with a recorded fixed spring diagram.
  • the edges of the outer and inner diameter of the helical spring can be rounded when rolling or pulling the desired rectangular or trapezoidal cross section of the spring steel strip.
  • the fiber course of the band is advantageous, which ensures a high resistance to breakage under the same load.
  • the force is applied via the flat-ground spring, similar to helical compression springs.
  • the object of the present invention is to provide a tool which simplifies the screwing together of helical plate springs.
  • a helical spring is a one-piece spring element, which consists of two identical, screwed together helical compression springs, each of which is wound from strip steel with plate spring-like cross-section upright and obliquely to the central axis.
  • One end of a helical compression spring can be clamped in the tool according to the invention.
  • one end of a helical compression spring is fixed in the claw for fixing the helical compression spring.
  • a tool assembly comprising two tools according to the invention, it is possible to screw two helical compression springs to a helical spring.
  • a helical compression spring or the corresponding tool is set in rotation in rotation, wherein the second tool or the helical compression spring disposed therein experiences no rotation. In this way, the two helical compression springs are screwed together.
  • the claw with respect to the passage in approximately diametrically opposite a stop for limiting the rotational movement of a second helical compression spring can be arranged.
  • a diameter of the passage by means of a fixing means which is preferably designed as a clamping device, be adjustable so that mandrels with different diameters can be accommodated.
  • the mandrel has a lateral surface which has a cylindrical portion on which a corresponding helical compression spring with little play can be plugged.
  • the mandrel may be provided with a conical tip.
  • the distance of the claw and the stop to the axis of rotation by means of an adjusting device be adjustable so that helical compression springs of different diameters can be accommodated.
  • helical compression springs with different diameters can be fixed.
  • the claw and the stop may be releasably connected to the end face of the tool, so that an arrangement of the projection of the claw is changeable with respect to the direction of rotation.
  • a system for screwing a fferentellerfedersatzes comprises a lathe and two trained according to one of claims 1 to 8 tools, wherein a helical compression spring can be arranged on each tool and a tool is rotatably fixed in the lathe about the axis of rotation and by means of the lathe in a rotational movement can be set.
  • a mandrel is fixed in a passage of one of the two tools.
  • the other tool has a passage into which the mandrel is insertable with little play, so that the two tools can be arranged axially aligned.
  • a helical compression spring in the respective claw is fixable, so that the two helical compression springs are screwed into each other to a helical spring, wherein the mandrel extends during screwing through a passage of the other tool.
  • the shank of a tool may be fixed in the system in a chuck of a lathe.
  • the latter has an approximately cylindrical tool body 2 (FIG. Fig. 1 . Fig. 2 ).
  • the lateral surface of the tool body 2 is arranged concentrically to a rotation axis 7.
  • the tool 1 can be rotated around the axis of rotation 7 in use.
  • a passage 3 extending in the axial direction is formed.
  • the passage 3 is arranged concentrically with the axis of rotation 7 in the tool body 2.
  • threaded holes 4 are provided on the tool body 2 in the longitudinal center, extending radially.
  • a roughly cylindrically shaped mandrel 5 is arranged in the passage 3.
  • the mandrel 5 is fixed by means of four, arranged in the threaded holes 4, 6 screws.
  • the mandrel 5 has a constant cross section, which is dimensioned such that a screw compression spring to be screwed with little play on a lateral surface of the mandrel (5) can be arranged.
  • the tool body 2 has an axis of rotation 7 approximately perpendicularly arranged end face 9.
  • a claw / stop body 11 is formed on the end face 9.
  • the claw / stop body 11 forms a wide web which extends transversely across the end face 9 and is arranged centrally on the tool body 2.
  • the passage 3 extends through the web.
  • the web has two parallel narrow side surfaces 10. On a narrow side surface 10, a recess or a groove is introduced, so that the groove of the limiting portion of the web forms a claw 12 for fixing a helical compression spring.
  • the claw 12 extends approximately in the radial direction and forms a projecting in the direction of rotation 8 projection.
  • the region of the narrow side surface 10 of the web which is arranged approximately diametrically opposite the claw 12 with respect to the passage 3, forms a stop 25 against which the helical compression spring abuts.
  • the claw 12 and the stop 25 are thus arranged approximately rotationally symmetrical to the axis of rotation 7 and the mandrel 5.
  • a shaft 13 is formed at the end face 9 of the tool body 2 opposite end of the tool 1.
  • the shaft 13 is designed such that it can be clamped in a chuck of a lathe.
  • the shaft 13 can in principle have any desired shape that is suitable for connecting the tool 1 to a lathe or for clamping the tool 1 in its chuck.
  • In a plan view in the axial direction of the shaft 13 thus circular, elliptical or polygonal with three, four, five or more, if necessary. Rounded, Be formed corners.
  • the shaft 13 and the mandrel 5 are preferably formed from a single pin which is fixed in the passage 3 of the tool body 2.
  • FIG. 2 Another embodiment of the tool 1 ( Fig. 2 ) has substantially the same tool body 2, wherein in the second embodiment, neither a mandrel nor a shank are provided.
  • the passage 3 of this embodiment of the tool body 2 is slightly larger than that of the first embodiment, so that the tool body 2 can be inserted with a little play on the mandrel 5 and the mandrel 5 is freely rotatable within the tool body 2.
  • a handle 26 is attached in each case.
  • a tool 1 according to the invention is designed in accordance with a second exemplary embodiment such that the tool 1 can produce helical disc springs of different diameters.
  • the structure of the tool 1 according to the invention according to the second embodiment substantially corresponds to the structure of the tool according to the first embodiment. Unless otherwise described, the tool according to the second embodiment has the same features as the tool according to the first embodiment. Identical components are provided with the same reference numerals.
  • the tool 1 according to the second embodiment comprises a tool body 2 which is formed in two parts ( FIG. 3 to FIG. 5 ).
  • the tool body 2 according to one of the first embodiment ( Fig. 3 ) is formed of two semicircular segments 14, 15, which are connected to each other by means of screws (not shown).
  • a rectangular recess 16 is provided centrally in the two semicircular segments 14, 15 or in the region of the axis of rotation 7.
  • two leaders mounted jaws 17, 18 are arranged in the recess 16 .
  • the two clamping jaws 17, 18 are spaced apart from one another in the radial direction on a guide device, for example a rail (not shown).
  • the jaws 17, 18 form in conjunction with a Adjustment of a clamping device. With the adjustment, the two jaws 17, 18 at the same time to each other or away from each other movable. In the embodiment according to Fig. 3 this adjustment is not shown.
  • Each of the clamping jaws 17, 18 has two bores 21, 22.
  • the claw 12 is formed according to the second embodiment as an L-shaped body, wherein a leg of a protruding in the direction of rotation 8 protrusion and the other leg extends in the axial direction and is provided with a cylindrical pin.
  • the claw 12 is inserted by means of the cylindrical pin in one of the holes 21 of the jaw 17.
  • the stop 25 is an approximately cuboid-shaped body which is also provided with an extending in the axial direction 10 cylinder pin.
  • the stop 25 is inserted by means of the cylindrical pin in a corresponding bore 22 of the clamping jaw 18, which is arranged approximately diametrically opposite the claw 12 with respect to the passage 3.
  • the claw 12 and the stop 25 can be fixed in two different positions on the tool 1.
  • the positions are determined so that the claw is aligned in the two positions in each case in the opposite direction, wherein a tongue of the claw is approximately tangential to a concentric to the axis of rotation 7, so that one end of a helical compression spring, which is placed on the mandrel 5 is, in the recess of the claw comes to rest.
  • These different positions of the holes 21, 22 thus allow the arrangement of the claws for a different Rotation or winding direction of the springs.
  • This tool can thus be used for left- or right-wound springs.
  • the tool can also be used for different thickness mandrels 5.
  • the present tool is thus very flexible for different sized helical plate springs used.
  • Fig. 4 shows a second embodiment with two handles 26.
  • the tool body is divided in this embodiment into two different sized circle segments 27, 28. Otherwise, this tool corresponds to the first embodiment Fig. 3 ,
  • the system 24 includes a claw-and-stop tool which is fixed in a chuck of a lathe.
  • a helical compression spring can be arranged.
  • the tool is rotatably fixed about the axis of rotation in the chuck of the lathe and can be set in a rotary motion by means of the lathe.
  • Another tool with claw and stop and handles is axially fixed in rotation with the first tool fixed in rotation.
  • the mandrel 5 is fixed in the passage of the first tool 1/1.
  • a first helical compression spring 29 is arranged on the mandrel 5, wherein it comprises one end of the claw 12 of the first tool 1/1 and is fixed in a rotationally fixed manner.
  • a second helical compression spring 30 is also located on the mandrel, wherein the two springs 29, 30 are arranged interlocked with a first turn section. The free end of the second helical compression spring 30 is received in the recess of the claw 12 of the second tool 1/2 and thereby fixed against rotation.
  • the first tool 1/1 and thus the first coil spring 29 is rotated.
  • the second tool 1/2 is rotatably held for a user on the handles 26, whereby the second helical compression spring 30 is fixed against rotation.
  • the two springs 29, 30 are screwed together. It is expedient to pull the second tool 1/2 with a counter force away from the first tool 1/1, whereby the unit from the two helical compression springs 29, 30 is held slightly under tension. As a result, the friction forces arising when screwing the two springs 29, 30 are minimized.
  • the lathe 20 is actuated until the two helical compression springs 29, 30 abut against the respective stops 25.
  • a foot key is provided, with which the user can adjust the rotational speed of the lathe 20.
  • the two helical compression springs 29, 30 are completely screwed to a helical spring, the ends of the helical compression springs are released from the claws 12, the second tool 1/2 is lifted from the mandrel 5 and the finished screwed helical compression spring removed from the mandrel 5.
  • the two helical compression springs 29, 30 already a piece, z. B. half a turn, screwed together before they are plugged onto the mandrel 5.
  • the mandrel 5 is fixed to the first tool 1/1, which is fixed to the lathe 20.

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Description

Die vorliegende Erfindung betrifft ein Werkzeug, ein System und ein Verfahren zum Verschrauben von Schraubendruckfedern zu einer Schraubentellerfeder.The present invention relates to a tool, system and method for bolting helical compression springs to a helical spring.

In der DE 476 852 A ist eine mit einer Nase versehene Klemme zum Festhalten eines Federendes auf einem Dorn von Schraubenfederwickelmaschinen offenbart. Die Nase ist an einem drehbaren Ring fixiert, der exzentrisch zum Dorn angeordnet ist. Mittels dieser Anordnung soll bei Beginn der Drehbewegung des Dorns die Nase näher an den Dorn herangerückt und ein ständig zunehmender Druck auf das eingeklemmte Federende durch die Nase ausgeübt werden, sodass nur ein kurzes, nicht über die Nase herausstehendes Stück der Feder eingeklemmt zu werden braucht.In the DE 476 852 A there is disclosed a nose-loaded clip for retaining a spring end on a mandrel of coil spring winding machines. The nose is fixed to a rotatable ring, which is arranged eccentrically to the mandrel. By means of this arrangement, the nose is moved closer to the mandrel at the beginning of the rotational movement of the mandrel and a constantly increasing pressure on the clamped spring end are exerted by the nose, so that only a short, not protruding over the nose piece of spring needs to be clamped.

Aus der DE 898 143 geht eine Vorrichtung zum Winden von Federn auf einem rotierenden Dorn hervor. Gemäß dieser Vorrichtung ist vorgesehen, dass an einem vorderen Teil eines Handgriffs eines Werkzeugs eine Scheibe einstellbar gelagert und derart ausgebildet ist, dass sie an ihrem Umfang von einem Minimum bis zu einem Maximum wechselnde Dicke aufweist. Hierdurch kann die Vorrichtung an den rotierenden Dorn derart angelegt werden, dass die Dicke der Scheibe an der Berührungsstelle am Dorn den gewünschten Abstand der Windungen der herzustellenden Feder entspricht. Die Scheibe ist dann an die letzte Windung des Drahtes auf dem Dorn anlegbar, sodass der Draht genau im gewünschten Abstand von dieser auf den Dorn aufläuft.From the DE 898 143 For example, a device for winding springs on a rotating mandrel emerges. According to this device it is provided that on a front part of a handle of a tool, a disc is adjustably mounted and is designed such that it at its periphery from a minimum up to having a maximum changing thickness. In this way, the device can be applied to the rotating mandrel such that the thickness of the disc at the point of contact with the mandrel corresponds to the desired spacing of the turns of the spring to be produced. The disc is then applied to the last turn of the wire on the mandrel, so that the wire runs exactly at the desired distance from this on the mandrel.

In der DE 29 16 446 C2 ist ein Schraubenfedersatz offenbart. Dieser Schraubenfedersatz umfasst zwei Schraubenfedern, die aus einem Federband hochkant zur Federachse gewickelt sind, wobei eine längere Querschnittseite des Federbandes einen Winkel kleiner 90 ° zur Federachse aufweist. Diese beiden Schraubenfedern sind mit gegeneinander gerichteter Schrägstellung der Querschnitte ineinander geschraubt.In the DE 29 16 446 C2 is disclosed a coil spring set. This coil spring set comprises two coil springs, which are wound from a spring band edgewise to the spring axis, with a longer cross-sectional side of the spring band having an angle smaller than 90 ° to the spring axis. These two coil springs are screwed together with oppositely directed oblique position of the cross sections.

Aus der DE 41 00 842 C1 geht eine Schraubenfeder hervor. Diese Schraubenfeder umfasst wenigstens ein an einem Ende des Federkörpers angebrachtes Tragelement. Das Tragelement und der Federkörper sind einstöckig ausgebildet, wobei der Federkörper durch Herauslösen von Werkstoff zwischen den Windungen hergestellt wird.From the DE 41 00 842 C1 a coil spring emerges. This coil spring comprises at least one attached to one end of the spring body support member. The support member and the spring body are integrally formed, wherein the spring body is made by dissolving material between the turns.

Aus der US 26 49 130 A geht eine Vorrichtung zum Wickeln von Schraubenfedern hervor. Diese Vorrichtung weist eine Antriebsspindel auf, in der ein Dorn angeordnet ist. Über eine Führungsanordnung wird ein Draht auf dem Dorn aufgebracht, wobei dieser Draht durch die Drehbewegung der Antriebsspindel zu einer Schraubenfeder auf den Dorn aufgewickelt wird.From the US 26 49 130 A goes out an apparatus for winding coil springs. This device has a drive spindle in which a mandrel is arranged. About a guide assembly, a wire is applied to the mandrel, said wire is wound by the rotational movement of the drive spindle to form a coil spring on the mandrel.

In der EP 2 223 752 A1 ist ein Werkzeugbausatz zum Ausbilden von an einer Biegemaschine einsetzbaren Biegewerkzeugen zum Biegen oder Wickeln strangförmiger Werkstücke beschrieben. Ein einzelnes Biegewerkzeug des Werkzeugbausatzes umfasst eine zylindrische Werkzeugaufnahme, auf deren Stirnseite ein Dornelement angeordnet ist. An der Stirnseite des Dornelements ist ein Biegedorn ausgebildet. Weiterhin ist am Biegewerkzeug ein Biegeelement mit einer Formbacke vorgesehen, das eine Formnut zum Andrücken eines strangförmigen Werkstückes beim Biegen gegen den Biegedorn aufweist. Die Formnuten unterschiedlicher Formbacken sind für unterschiedliche Werkstückquerschnitte ausgelegt.In the EP 2 223 752 A1 is a tool kit for forming applicable to a bending machine bending tools for bending or winding strand-shaped workpieces described. A single bending tool of the tool kit comprises a cylindrical tool holder, on the front side of a mandrel element is arranged. On the front side of the mandrel element, a bending mandrel is formed. Furthermore, the bending tool is a bending element with a Formbacke provided which has a shaping groove for pressing a strand-shaped workpiece when bending against the bending mandrel. The form grooves of different mold jaws are designed for different workpiece cross sections.

Aus der US 4 253 350 A geht eine Vorrichtung zum Vorspannen von Garagentorfedern hervor. Gemäß dieser Vorrichtung ist vorgesehen, eine Feder auf einem zylindrischen, dornartigen Körper anzuordnen und ein Ende der Feder mit einer entsprechenden, mit dem Dorn verbundenen Aufnahme ortsfest zu fixieren. Das andere freie Ende der Feder ist mit einem Ratschenmechanismus der Vorrichtung verbunden. Durch Betätigen des Ratschenmechanismus kann die Feder entsprechend vorgespannt und in einen entsprechenden Mechanismus eines Garagentores eingesetzt werden.From the US 4,253,350 A is a device for biasing Garagentorfedern out. According to this device is provided to arrange a spring on a cylindrical, mandrel-like body and fix one end of the spring with a corresponding, associated with the mandrel receptacle fixed. The other free end of the spring is connected to a ratchet mechanism of the device. By operating the ratchet mechanism, the spring can be correspondingly biased and used in a corresponding mechanism of a garage door.

Die industrielle Produktion und die Anwendung von Tellerfedern ist mit zahlreichen Nachteilen verbunden. Bei der Produktion sind hierbei der hohe Material- und Arbeitsaufwand zu nennen. In der Anwendung weisen Tellerfedern den Nachteil auf, dass Montage und Wartung aufgrund der vielen Einzelteller zeitintensiv sind. Zudem begünstigt der ungünstige Faserverlauf des Werkstoffes das Auftreten von Brüchen.The industrial production and the use of disc springs has numerous disadvantages. In the production here are the high material and labor costs to call. Disc springs in the application have the disadvantage that assembly and maintenance are time-consuming due to the many individual plates. In addition, the unfavorable fiber shape of the material promotes the occurrence of fractures.

Um diese Nachteile zu vermeiden, wurden gewickelte Schraubentellerfedern entwickelt. Diese können in vielen Fällen gegensinnig geschichtete Tellerfedersäulen ersetzen.To avoid these disadvantages, wound helical plate springs have been developed. These can in many cases replace oppositely stacked disc spring columns.

Die Schraubentellerfeder ist ein einteiliges Federelement, das aus zwei gleichen, ineinander geschraubten Schraubendruckfedern besteht, von denen jede aus Bandstahl mit Tellerfeder ähnlichem Querschnitt hochkant und schräg zur Mittelachse gewickelt wird.The helical spring is a one-piece spring element, which consists of two identical, screwed together helical compression springs, each of which is wound from strip steel with plate spring-like cross section upright and obliquely to the central axis.

Da Schraubentellerfedern nicht in Einzelteller zerfallen, habe sie den Vorteil, dass sie mit protokolliertem unveränderlichem Federdiagramm ausgeliefert werden können. Die Kanten der Außen- und Innendurchmesser der Schraubentellerfeder können beim Walzen oder Ziehen des gewünschten rechteckigen oder trapezförmigen Querschnitts des Federbandstahles mit verrundet werden. Der Faserverlauf des Bandes ist vorteilhaft, was bei gleicher Beanspruchung eine hohe Bruchsicherheit gewährleistet. Die Krafteinleitung erfolgt über die plan geschliffene Feder, ähnlich wie bei Schraubendruckfedern.Since screw-spring springs do not disintegrate into single plates, they have the advantage that they can be delivered with a recorded fixed spring diagram. The edges of the outer and inner diameter of the helical spring can be rounded when rolling or pulling the desired rectangular or trapezoidal cross section of the spring steel strip. The fiber course of the band is advantageous, which ensures a high resistance to breakage under the same load. The force is applied via the flat-ground spring, similar to helical compression springs.

Aufgabe der vorliegenden Erfindung ist es ein Werkzeug bereitzustellen, das das Zusammenschrauben von Schraubentellerfedern vereinfacht.The object of the present invention is to provide a tool which simplifies the screwing together of helical plate springs.

Die Erfindung weist zur Lösung dieser Aufgabe die in den unabhängigen Ansprüchen angegebenen Merkmale auf. Vorteilhafte Ausgestaltungen hiervon sind in den jeweiligen Unteransprüchen angegeben.To achieve this object, the invention has the features specified in the independent claims. Advantageous embodiments thereof are specified in the respective subclaims.

Erfindungsgemäß ist ein Werkzeug zum Verschrauben von Schraubentellerfedern gemäß Anspruch 1 vorgesehen. Eine Schraubentellerfeder ist ein einteiliges Federelement, das aus zwei gleichen, ineinander geschraubten Schraubendruckfedern besteht, von denen jede aus Bandstahl mit tellerfederähnlichem Querschnitt hochkant und schräg zur Mittelachse gewickelt wird.According to the invention a tool for screwing Schraubentellerfedern is provided according to claim 1. A helical spring is a one-piece spring element, which consists of two identical, screwed together helical compression springs, each of which is wound from strip steel with plate spring-like cross-section upright and obliquely to the central axis.

Ein Ende einer Schraubendruckfeder ist in das erfindungsgemäße Werkzeug einspannbar. Hierbei wird ein Ende einer Schraubendruckfeder in der Kralle zum Fixieren der Schraubendruckfeder fixiert.One end of a helical compression spring can be clamped in the tool according to the invention. Here, one end of a helical compression spring is fixed in the claw for fixing the helical compression spring.

Durch Vorsehen einer Werkzeuganordnung umfassend zwei erfindungsgemäße Werkzeuge ist es möglich, zwei Schraubendruckfedern zu einer Schraubentellerfeder zu verschrauben. Hierbei wird eine Schraubendruckfeder bzw. das entsprechende Werkzeug in Drehrichtung in Rotation versetzt, wobei das zweite Werkzeug bzw. die darin angeordnete Schraubendruckfeder keine Rotation erfährt. Auf diese Weise werden die beiden Schraubendruckfedern ineinander verschraubt.By providing a tool assembly comprising two tools according to the invention, it is possible to screw two helical compression springs to a helical spring. Here, a helical compression spring or the corresponding tool is set in rotation in rotation, wherein the second tool or the helical compression spring disposed therein experiences no rotation. In this way, the two helical compression springs are screwed together.

Weiterhin kann der Kralle bezüglich des Durchgangs in etwa diametral gegenüberliegend ein Anschlag zum Begrenzen der Drehbewegung einer zweiten Schraubendruckfeder angeordnet sein.Furthermore, the claw with respect to the passage in approximately diametrically opposite a stop for limiting the rotational movement of a second helical compression spring can be arranged.

Beim Verschrauben zweier Schraubendruckfedern sind nach Erreichen des Anschlages beide Schraubendruckfedern vollständig ineinander geschraubt.When screwing two helical compression springs after reaching the stop both helical compression springs are completely screwed together.

Gemäß einer zweiten Ausführungsform des erfindungsgemäßen Werkzeuges kann ein Durchmesser des Durchgangs mittels eines Fixiermittels, welches vorzugsweise als Klemmeinrichtung ausgebildet ist, derart verstellbar sein, dass Dorne mit verschiedenen Durchmessen aufnehmbar sind.According to a second embodiment of the tool according to the invention, a diameter of the passage by means of a fixing means, which is preferably designed as a clamping device, be adjustable so that mandrels with different diameters can be accommodated.

Auf diese Weise ist es möglich Schraubendruckfedern mit unterschiedlichen Durchmessern mit einem einzigen Werkzeug miteinander zu verschrauben.In this way it is possible to screw together helical compression springs with different diameters with a single tool.

Der Dorn weist eine Mantelfläche auf, die einen zylinderförmigen Abschnitt besitzt, auf den eine entsprechende Schraubendruckfeder mit geringem Spiel aufsteckbar ist. Der Dorn kann mit einer konischen Spitze versehen sein.The mandrel has a lateral surface which has a cylindrical portion on which a corresponding helical compression spring with little play can be plugged. The mandrel may be provided with a conical tip.

Weiterhin kann gemäß dem zweiten Ausführungsbeispiel der Abstand der Kralle und des Anschlages zur Drehachse mittels einer Verstelleinrichtung derart einstellbar sein, dass Schraubendruckfedern verschiedenster Durchmesser aufnehmbar sind. Hierdurch können Schraubendruckfedern mit unterschiedlichem Durchmesser fixiert werden.Furthermore, according to the second embodiment, the distance of the claw and the stop to the axis of rotation by means of an adjusting device be adjustable so that helical compression springs of different diameters can be accommodated. As a result, helical compression springs with different diameters can be fixed.

Die Kralle und der Anschlag können lösbar mit der Stirnseite des Werkzeuges verbunden sein, so dass eine Anordnung des Vorsprungs der Kralle bezüglich der Drehrichtung veränderbar ist.The claw and the stop may be releasably connected to the end face of the tool, so that an arrangement of the projection of the claw is changeable with respect to the direction of rotation.

Auf diese Weise können links- und rechtsgewickelte Schraubendruckfedern zu einer Schraubentellerfeder verschraubt werden. Weiterhin ist ein System zum Verschrauben eines Schraubentellerfedersatzes vorgesehen. Dieses umfasst eine Drehmaschine und zwei gemäß einem der Ansprüche 1 bis 8 ausgebildeter Werkzeuge, wobei an jedem Werkzeug eine Schraubendruckfeder anordbar ist und das eine Werkzeug in der Drehmaschine um die Drehachse drehbar fixiert ist und mittels der Drehmaschine in eine Drehbewegung versetzbar ist. Ein Dorn ist in einem Durchgang eines der beiden Werkzeuge fixiert. Das andere Werkzeug weist einen Durchgang auf, in den der Dorn mit geringem Spiel einführbar ist, so dass die beiden Werkzeuge axial fluchtend anordbar sind. An einem jeden der beiden Werkzeuge ist eine Schraubendruckfeder in der jeweiligen Kralle fixierbar, so dass die beiden Schraubendruckfedern ineinander zu einer Schraubentellerfeder verschraubbar sind, wobei sich der Dorn beim Verschrauben durch einen Durchgang des anderen Werkzeugs erstreckt. Der Schaft eines Werkzeuges kann in dem System in einem Spannfutter einer Drehmaschine fixiert sein.In this way, left- and right-wound helical compression springs can be screwed to form a helical plate spring. Furthermore, a system for screwing a Schraubentellerfedersatzes is provided. This comprises a lathe and two trained according to one of claims 1 to 8 tools, wherein a helical compression spring can be arranged on each tool and a tool is rotatably fixed in the lathe about the axis of rotation and by means of the lathe in a rotational movement can be set. A mandrel is fixed in a passage of one of the two tools. The other tool has a passage into which the mandrel is insertable with little play, so that the two tools can be arranged axially aligned. At each of the two tools, a helical compression spring in the respective claw is fixable, so that the two helical compression springs are screwed into each other to a helical spring, wherein the mandrel extends during screwing through a passage of the other tool. The shank of a tool may be fixed in the system in a chuck of a lathe.

Unter einer Drehmaschine werden im Rahmen der vorliegenden Erfindung sämtliche rotierende Arbeitsmaschinen, wie z.B. Drehmaschinen, Fräsmaschinen, Bohrmaschinen, Motoren bzw. Antriebe oder dergleichen verstanden.Under a lathe, in the context of the present invention, all rotating working machines, such as e.g. Lathes, milling machines, drills, motors or drives or the like understood.

Die Erfindung wird im folgenden anhand der Zeichnungen näher erläutert. Diese zeigen in:

Fig. 1
ist eine perspektivische Darstellung eines erfindungsgemäßen Werkzeugs gemäß einem ersten Ausführungsbeispiel mit Dorn,
Fig. 2
ist eine perspektivische Darstellung des erfindungsgemäßen Werkzeugs gemäß dem ersten Ausführungsbeispiel mit Haltegriffen,
Fig. 3
ist eine perspektivische Darstellung des erfindungsgemäßen Werkzeugs gemäß einem zweiten Ausführungsbeispiel mit Dorn und Klemmeinrichtung,
Fig. 4
ist eine perspektivische Darstellung des erfindungsgemäßen Werkzeugs gemäß dem zweiten Ausführungsbeispiel mit Haltegriffen, und
Fig. 5
ist eine schematische Darstellung eines erfindungsgemäßen Systems zum Verschrauben von Schraubendruckfedern zu einem Schraubentellerfedersatz.
The invention will be explained in more detail below with reference to the drawings. These show in:
Fig. 1
is a perspective view of a tool according to the invention according to a first embodiment with mandrel,
Fig. 2
is a perspective view of the tool according to the invention according to the first embodiment with handles,
Fig. 3
is a perspective view of the tool according to the invention according to a second embodiment with mandrel and clamping device,
Fig. 4
is a perspective view of the tool according to the invention according to the second embodiment with handles, and
Fig. 5
is a schematic representation of a system according to the invention for screwing helical compression springs to a Schraubentellerfedersatz.

Gemäß einem ersten Ausführungsbeispiel des erfindungsgemäßen Werkzeugs 1 weist dieses einen in etwa zylindrisch ausgebildeten Werkzeugkörper 2 auf (Fig. 1, Fig. 2).According to a first exemplary embodiment of the tool 1 according to the invention, the latter has an approximately cylindrical tool body 2 (FIG. Fig. 1 . Fig. 2 ).

Die Mantelfläche des Werkzeugkörpers 2 ist konzentrisch zu einer Drehachse 7 angeordnet. Das Werkzeug 1 kann bei Benutzung um die Drehachse 7 gedreht werden. Im Werkzeugkörper 2 ist ein sich in axialer Richtung erstreckender Durchgang 3 ausgebildet. Der Durchgang 3 ist im Werkzeugkörper 2 konzentrisch zu der Drehachse 7 angeordnet.The lateral surface of the tool body 2 is arranged concentrically to a rotation axis 7. The tool 1 can be rotated around the axis of rotation 7 in use. In the tool body 2, a passage 3 extending in the axial direction is formed. The passage 3 is arranged concentrically with the axis of rotation 7 in the tool body 2.

Weiterhin sind am Werkzeugkörper 2 in etwa längsmittig, sich radial erstreckend, vier Gewindebohrungen 4 vorgesehen.Furthermore, four threaded holes 4 are provided on the tool body 2 in the longitudinal center, extending radially.

Im Durchgang 3 ist ein in etwa zylindrisch ausgebildeter Dorn 5 angeordnet. Der Dorn 5 ist mittels vierer, in den Gewindebohrungen 4 angeordneter, Schrauben 6 fixiert.In the passage 3, a roughly cylindrically shaped mandrel 5 is arranged. The mandrel 5 is fixed by means of four, arranged in the threaded holes 4, 6 screws.

Der Dorn 5 weist einen konstanten Querschnitt auf, der derart bemessen ist, dass eine zu verschraubende Schraubendruckfeder mit geringem Spiel auf einer Mantelfläche des Dornes (5) anordbar ist.The mandrel 5 has a constant cross section, which is dimensioned such that a screw compression spring to be screwed with little play on a lateral surface of the mandrel (5) can be arranged.

Der Werkzeugkörper 2 weist eine zur Drehachse 7 in etwa senkrecht angeordnete Stirnfläche 9 auf. Auf der Stirnfläche 9 ist ein Krallen-/Anschlagskörper 11 ausgebildet. Der Krallen-/Anschlagskörper 11 bildet einen breiten Steg, der sich quer über die Stirnfläche 9 erstreckt und mittig am Werkzeugkörper 2 angeordnet ist. Der Durchgang 3 erstreckt sich durch den Steg hindurch. Der Steg weist zwei parallele Schmalseitenflächen 10 auf. An einer Schmalseitenfläche 10 ist eine Ausnehmung bzw. eine Nut eingebracht, so dass der die Nut begrenzende Abschnitt des Steges eine Kralle 12 zum Fixieren einer Schraubendruckfeder bildet. Die Kralle 12 erstreckt sich etwa in radialer Richtung und bildet einen in Drehrichtung 8 vorstehenden Vorsprung. Der Bereich der Schmalseitenfläche 10 des Steges, der bezüglich des Durchganges 3 in etwa diametral gegenüberliegend zur Kralle 12 angeordnet ist, bildet einen Anschlag 25 aus, an dem die Schraubendruckfeder anschlägt. Die Kralle 12 und der Anschlag 25 sind somit etwa rotationssymmetrisch zur Drehachse 7 bzw. zum Dorn 5 angeordnet.The tool body 2 has an axis of rotation 7 approximately perpendicularly arranged end face 9. On the end face 9, a claw / stop body 11 is formed. The claw / stop body 11 forms a wide web which extends transversely across the end face 9 and is arranged centrally on the tool body 2. The passage 3 extends through the web. The web has two parallel narrow side surfaces 10. On a narrow side surface 10, a recess or a groove is introduced, so that the groove of the limiting portion of the web forms a claw 12 for fixing a helical compression spring. The claw 12 extends approximately in the radial direction and forms a projecting in the direction of rotation 8 projection. The region of the narrow side surface 10 of the web, which is arranged approximately diametrically opposite the claw 12 with respect to the passage 3, forms a stop 25 against which the helical compression spring abuts. The claw 12 and the stop 25 are thus arranged approximately rotationally symmetrical to the axis of rotation 7 and the mandrel 5.

An dem der Stirnfläche 9 des Werkzeugkörpers 2 gegenüberliegenden Ende des Werkzeuges 1 ist ein Schaft 13 angeformt. Der Schaft 13 ist derart ausgebildet, dass er in ein Spannfutter einer Drehmaschine einspannbar ist. Der Schaft 13 kann prinzipiell jede beliebige Form aufweisen, die geeignet ist, um das Wekzeug 1 mit einer Drehmaschine zu verbinden bzw. um das Werkzeug 1 in dessen Spannfutter einzuspannen. In einer Draufsicht in axialer Richtung kann der Schaft 13 somit kreisförmig, elliptisch oder polygon mit drei, vier, fünf oder mehr, ggfs. abgerundeten, Ecken ausgebildet sein. Der Schaft 13 und der Dorn 5 sind vorzugsweise aus einem einzigen Stift ausgebildet, der im Durchgang 3 des Werkzeugkörpers 2 fixiert ist.At the end face 9 of the tool body 2 opposite end of the tool 1, a shaft 13 is formed. The shaft 13 is designed such that it can be clamped in a chuck of a lathe. The shaft 13 can in principle have any desired shape that is suitable for connecting the tool 1 to a lathe or for clamping the tool 1 in its chuck. In a plan view in the axial direction of the shaft 13 thus circular, elliptical or polygonal with three, four, five or more, if necessary. Rounded, Be formed corners. The shaft 13 and the mandrel 5 are preferably formed from a single pin which is fixed in the passage 3 of the tool body 2.

Eine weitere Ausführungsform des Werkzeuges 1 (Fig. 2) weist im wesentlichen den gleichen Werkzeugkörper 2 auf, wobei in der zweiten Ausführungsform weder ein Dorn noch ein Schaft vorgesehen sind. Der Durchgang 3 dieser Ausführungsform des Werkzeugkörpers 2 ist geringfügig größer als der der ersten Ausführungsform, so dass der Werkzeugkörper 2 mit etwas Spiel auf den Dorn 5 gesteckt werden kann und der Dorn 5 frei drehbar innerhalb des Werkzeugkörpers 2 ist. An zwei gegenüberliegenden Gewindebohrungen 4 ist jeweils ein Haltegriff 26 befestigt.Another embodiment of the tool 1 ( Fig. 2 ) has substantially the same tool body 2, wherein in the second embodiment, neither a mandrel nor a shank are provided. The passage 3 of this embodiment of the tool body 2 is slightly larger than that of the first embodiment, so that the tool body 2 can be inserted with a little play on the mandrel 5 and the mandrel 5 is freely rotatable within the tool body 2. At two opposite threaded holes 4, a handle 26 is attached in each case.

Ein erfindungsgemäßes Werkzeug 1 ist gemäß einem zweiten Ausführungsbeispiel derart ausgebildet, dass das Werkzeug 1 Schraubentellerfedern unterschiedlicher Durchmesser herstellen kann. Der Aufbau des erfindungsgemäßen Werkzeugs 1 gemäß dem zweiten Ausführungsbeispiel entspricht im Wesentlichen dem Aufbau des Werkzeuges gemäß dem ersten Ausführungsbeispiel. Sofern nichts Anderes beschrieben ist, weist das Werkzeug gemäß dem zweiten Ausführungsbeispiel dieselben Merkmale wie das Werkzeug gemäß dem ersten Ausführungsbeispiel auf. Gleiche Bauteile sind mit den gleichen Bezugszeichen versehen.A tool 1 according to the invention is designed in accordance with a second exemplary embodiment such that the tool 1 can produce helical disc springs of different diameters. The structure of the tool 1 according to the invention according to the second embodiment substantially corresponds to the structure of the tool according to the first embodiment. Unless otherwise described, the tool according to the second embodiment has the same features as the tool according to the first embodiment. Identical components are provided with the same reference numerals.

Das Werkzeug 1 gemäß dem zweiten Ausführungsbeispiel umfasst einen Werkzeugkörper 2 der zweiteilig ausgebildet ist (Fig. 3 bis Fig. 5).The tool 1 according to the second embodiment comprises a tool body 2 which is formed in two parts ( FIG. 3 to FIG. 5 ).

Der Werkzeugkörper 2 gemäß einer der ersten Ausführungsform (Fig. 3) ist aus zwei halbkreisförmigen Segmenten 14, 15 ausgebildet, die miteinander mittels Schrauben (nicht dargestellt) verbunden sind.The tool body 2 according to one of the first embodiment ( Fig. 3 ) is formed of two semicircular segments 14, 15, which are connected to each other by means of screws (not shown).

Im zusammengesetzten Zustand ist in den beiden halbkreisförmigen Segmenten 14, 15 mittig bzw. im Bereich der Drehachse 7 eine rechteckförmige Ausnehmung 16 vorgesehen. In der Ausnehmung 16 sind zwei führend gelagerte Klemmbacken 17, 18 angeordnet. Die beiden Klemmbacken 17, 18 sind in radialer Richtung auf einer Führungseinrichtung, beispielsweise einer Schiene (nicht dargestellt) beabstandet voneinander anordbar. Die Klemmbacken 17, 18 bilden in Verbindung mit einer Verstelleinrichtung eine Klemmeinrichtung aus. Mit der Verstelleinrichtung sind die beiden Klemmbacken 17, 18 gleichzeitig aufeinander zu bzw. voneinander weg bewegbar. Bei der Ausführungsform gemäß Fig. 3 ist diese Verstelleinrichtung nicht dargestellt.In the assembled state, a rectangular recess 16 is provided centrally in the two semicircular segments 14, 15 or in the region of the axis of rotation 7. In the recess 16 two leaders mounted jaws 17, 18 are arranged. The two clamping jaws 17, 18 are spaced apart from one another in the radial direction on a guide device, for example a rail (not shown). The jaws 17, 18 form in conjunction with a Adjustment of a clamping device. With the adjustment, the two jaws 17, 18 at the same time to each other or away from each other movable. In the embodiment according to Fig. 3 this adjustment is not shown.

Zwischen den Klemmbacken 17, 18 kann der Dorn 5 eingeklemmt werden.Between the jaws 17, 18 of the mandrel 5 can be clamped.

Jeder der Klemmbacken 17, 18 weist zwei Bohrungen 21, 22 auf.Each of the clamping jaws 17, 18 has two bores 21, 22.

Die Kralle 12 ist gemäß dem zweiten Ausführungsbeispiel als L-förmiger Körper ausgebildet, wobei ein Schenkel einer in Drehrichtung 8 vorstehenden Vorsprung ausbildet und der andere Schenkel sich in axialer Richtung erstreckt und mit einem Zylinderstift versehen ist. Die Kralle 12 ist mittels des Zylinderstiftes in einer der Bohrungen 21 der Klemmbacke 17 eingesetzt.The claw 12 is formed according to the second embodiment as an L-shaped body, wherein a leg of a protruding in the direction of rotation 8 protrusion and the other leg extends in the axial direction and is provided with a cylindrical pin. The claw 12 is inserted by means of the cylindrical pin in one of the holes 21 of the jaw 17.

Der Anschlag 25 ist ein in etwa quaderförmig ausgebildeter Körper der ebenfalls mit einem sich in axialer Richtung 10 erstreckenden Zylinderstift versehen ist. Der Anschlag 25 ist mittels des Zylinderstiftes in einer entsprechenden Bohrung 22 der Klemmbacke 18 eingesetzt, die in etwa bezüglich des Durchgangs 3 diametral gegenüberliegend zur Kralle 12 angeordnet ist.The stop 25 is an approximately cuboid-shaped body which is also provided with an extending in the axial direction 10 cylinder pin. The stop 25 is inserted by means of the cylindrical pin in a corresponding bore 22 of the clamping jaw 18, which is arranged approximately diametrically opposite the claw 12 with respect to the passage 3.

Im Folgenden wird ein System 24 zum Verschrauben eines Schraubentellerfedersatzes beschrieben (Fig. 5).Hereinafter, a system 24 for screwing a Schraubentellerfedersatzes described ( Fig. 5 ).

Da die Klemmbacke 17, 18 jeweils zwei Bohrungen aufweisen können die Kralle 12 und der Anschlag 25 in zwei unterschiedlichen Positionen am Werkzeug 1 fixiert werden. Die Positionen sind so festgelegt, dass die Kralle in den beiden Positionen jeweils in entgegengesetzte Richtung ausgerichtet ist, wobei eine Zunge der Kralle etwa tangential zu einem zur Drehachse 7 konzentrischen Kreis angeordnet ist, so dass ein Ende einer Schraubendruckfeder, die auf den Dorn 5 aufgesetzt ist, in der Ausnehmung der Kralle zur Anlage kommt. Diese unterschiedlichen Positionen der Bohrungen 21, 22 erlauben somit die Anordnung der Krallen für eine unterschiedliche Dreh- bzw. Wicklungsrichtung der Federn. Dieses Werkzeug kann somit für links- bzw. rechtsgewickelte Federn verwendet werden.Since the clamping jaw 17, 18 each have two holes, the claw 12 and the stop 25 can be fixed in two different positions on the tool 1. The positions are determined so that the claw is aligned in the two positions in each case in the opposite direction, wherein a tongue of the claw is approximately tangential to a concentric to the axis of rotation 7, so that one end of a helical compression spring, which is placed on the mandrel 5 is, in the recess of the claw comes to rest. These different positions of the holes 21, 22 thus allow the arrangement of the claws for a different Rotation or winding direction of the springs. This tool can thus be used for left- or right-wound springs.

Da der Abstand zwischen den Klemmbacken 17, 18 verstellbar ist, kann das Werkzeug auch für unterschiedlich dicke Dorne 5 eingesetzt werden. Das vorliegende Werkzeug ist somit sehr flexibel für unterschiedlich dimensionierte Schraubentellerfedern verwendbar.Since the distance between the jaws 17, 18 is adjustable, the tool can also be used for different thickness mandrels 5. The present tool is thus very flexible for different sized helical plate springs used.

Fig. 4 zeigt eine zweite Ausführungsform mit zwei Haltegriffen 26. Der Werkzeugkörper ist bei dieser Ausführungsform in zwei unterschiedlich große Kreissegmente 27, 28 aufgeteilt. Ansonsten entspricht dieses Werkzeug der ersten Ausführungsform aus Fig. 3. Fig. 4 shows a second embodiment with two handles 26. The tool body is divided in this embodiment into two different sized circle segments 27, 28. Otherwise, this tool corresponds to the first embodiment Fig. 3 ,

Das System 24 umfasst ein mit Kralle und Anschlag versehenes Werkzeug, welches in einem Spannfutter einer Drehmaschine fixiert ist.The system 24 includes a claw-and-stop tool which is fixed in a chuck of a lathe.

In diesem Werkzeug ist eine Schraubendruckfeder anordbar. Das Werkzeug ist im Spannfutter der Drehmaschine um die Drehachse drehbar fixiert und mittels der Drehmaschine in eine Drehbewegung versetzbar.In this tool, a helical compression spring can be arranged. The tool is rotatably fixed about the axis of rotation in the chuck of the lathe and can be set in a rotary motion by means of the lathe.

Ein weiteres Werkzeug mit Kralle und Anschlag sowie Haltegriffen ist axial fluchtend zu dem ersten Werkzeug drehfest fixiert.Another tool with claw and stop and handles is axially fixed in rotation with the first tool fixed in rotation.

Der Dorn 5 ist im Durchgang des ersten Werkzeuges 1/1 fixiert.The mandrel 5 is fixed in the passage of the first tool 1/1.

Eine erste Schraubendruckfeder 29 ist auf dem Dorn 5 angeordnet, wobei es mit einem Ende von der Kralle 12 des ersten Werkzeuges 1/1 umfasst und drehfest fixiert wird. Eine zweite Schraubendruckfeder 30 befindet sich auch auf dem Dorn, wobei die beiden Federn 29, 30 mit einem ersten Windungsabschnitt ineinander verzahnt angeordnet sind. Das freie Ende der zweiten Schraubendruckfeder 30 ist in der Ausnehmung der Kralle 12 des zweiten Werkzeuges 1/2 aufgenommen und hierdurch drehfest fixiert.A first helical compression spring 29 is arranged on the mandrel 5, wherein it comprises one end of the claw 12 of the first tool 1/1 and is fixed in a rotationally fixed manner. A second helical compression spring 30 is also located on the mandrel, wherein the two springs 29, 30 are arranged interlocked with a first turn section. The free end of the second helical compression spring 30 is received in the recess of the claw 12 of the second tool 1/2 and thereby fixed against rotation.

Bei Betätigung der Drehmaschine 20 wird das erste Werkzeug 1/1 und damit die erste Schraubenfeder 29 gedreht. Das zweite Werkzeug 1/2 wird für einen Benutzer an den Haltegriffen 26 drehfest gehalten, wodurch die zweite Schraubendruckfeder 30 drehfest fixiert ist. Die beiden Federn 29, 30 werden miteinander verschraubt. Hierbei ist es zweckmäßig das zweite Werkzeug 1/2 mit einer Gegenkraft weg vom ersten Werkzeug 1/1 zu ziehen, wodurch die Einheit aus den beiden Schraubendruckfedern 29, 30 etwas unter Zugspannung gehalten wird. Hierdurch werden die beim Verschrauben der beiden Federn 29, 30 entstehenden Reibungskräfte minimiert. Die Drehmaschine 20 wird solange betätigt, bis die beiden Schraubendruckfedern 29, 30 an den jeweiligen Anschlägen 25 anschlagen. Vorzugsweise ist eine Fußtaste vorgesehen, mit welcher der Benutzer die Drehgeschwindigkeit der Drehmaschine 20 einstellen kann.Upon actuation of the lathe 20, the first tool 1/1 and thus the first coil spring 29 is rotated. The second tool 1/2 is rotatably held for a user on the handles 26, whereby the second helical compression spring 30 is fixed against rotation. The two springs 29, 30 are screwed together. It is expedient to pull the second tool 1/2 with a counter force away from the first tool 1/1, whereby the unit from the two helical compression springs 29, 30 is held slightly under tension. As a result, the friction forces arising when screwing the two springs 29, 30 are minimized. The lathe 20 is actuated until the two helical compression springs 29, 30 abut against the respective stops 25. Preferably, a foot key is provided, with which the user can adjust the rotational speed of the lathe 20.

Sind die beiden Schraubendruckfedern 29, 30 zu einer Schraubentellerfeder vollständig verschraubt, so werden die Enden der Schraubendruckfedern aus den Krallen 12 gelöst, das zweite Werkzeug 1/2 wird vom Dorn 5 abgehoben und die fertig verschraubte Schraubendruckfeder vom Dorn 5 abgenommen. Vorzugsweise werden die beiden Schraubendruckfedern 29, 30 bereits ein Stück, z. B. eine halbe Windung, ineinander verschraubt, bevor sie auf den Dorn 5 aufgesteckt werden.Are the two helical compression springs 29, 30 completely screwed to a helical spring, the ends of the helical compression springs are released from the claws 12, the second tool 1/2 is lifted from the mandrel 5 and the finished screwed helical compression spring removed from the mandrel 5. Preferably, the two helical compression springs 29, 30 already a piece, z. B. half a turn, screwed together before they are plugged onto the mandrel 5.

Bei diesem Ausführungsbeispiel ist der Dorn 5 an dem ersten Werkzeug 1/1 fixiert, das an der Drehmaschine 20 befestigt ist. Im Rahmen der Erfindung ist es selbstverständlich auch möglich, den Dorn 5 am zweiten Werkzeug 1/2, das manuell gehalten wird, zu fixieren und am anderen Werkzeug 1/1 einen Durchgang für den Dorn vorzusehen.In this embodiment, the mandrel 5 is fixed to the first tool 1/1, which is fixed to the lathe 20. In the context of the invention, it is of course also possible to fix the mandrel 5 on the second tool 1/2, which is held manually, and to provide a passage for the mandrel on the other tool 1/1.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
WerkzeugTool
22
Werkzeugkörpertool body
33
Durchgangpassage
44
Gewindebohrungthreaded hole
55
Dornmandrel
66
Schraubescrew
77
Drehachseaxis of rotation
88th
Drehrichtungdirection of rotation
99
Stirnflächeface
1010
SchmalseitenflächeEdge face
1111
Krallen-/AnschlagskörperClaw / stop body
1212
Kralleclaw
1313
Schaftshaft
1414
halbkreisförmiges Segmentsemicircular segment
1515
halbkreisförmiges Segmentsemicircular segment
1616
Ausnehmungrecess
1717
Klemmbackenjaws
1818
Klemmbackenjaws
19 2019 20
Drehmaschinelathe
2121
DurchgangsbohrungThrough Hole
2222
DurchgangsbohrungThrough Hole
23 2423 24
System zum Verschrauben von SchraubentellerfedernSystem for screwing screw disc springs
2525
Anschlagattack
2626
Haltegriffhandle
2727
Kreissegmentcircular segment
2828
Kreissegmentcircular segment
2929
SchraubendruckfederHelical compression spring
3030
SchraubendruckfederHelical compression spring

Claims (15)

  1. Tool for screwing helical compression springs to a helical plate spring with a tool body (2) having a passage (3) for receiving a mandrel (5) on which a helical compression spring (29, 30) can be arranged, wherein the passage is arranged concentric with an axis of rotation 7, about which the tool (1), when screwing the helical compression springs (29, 30), is to rotate in a predetermined direction of rotation (8), and wherein the tool body (2) has a front surface (9) arranged approximately perpendicular to the rotation axis 7, wherein adjacent to the passage (3) on the front surface (9) a claw (12) for fixing one end of a helical compression spring (29, 30) is formed,
    characterized in that
    it has a projection in the direction of rotation (8).
  2. Tool according to claim 1,
    characterized in that
    approximately diametrically opposite to the projection with respect to the passage (3) a stop (25) for limiting the rotational movement of a second helical compression spring is arranged.
  3. Tool according to claim 1 or 2,
    characterized in that
    the inside width of the passage (3) is adjustable so that mandrels (5) of different thickness can be accommodated.
  4. Tool according to one of claims 1 to 3,
    characterized in that
    the mandrel (5) at least partially has a lateral surface having a constant cross-section on which a helical compression spring can be plugged with little clearance.
  5. Tool according to one of claims 1 to 4,
    characterized in that
    the claw (12) and the stop (25) are releasably connectable to the front surface of the tool (1), so that an arrangement of the projection of the claw (12) with respect Direction of rotation (8) is variable, so that left- and right-wound helical compression springs can be accommodated.
  6. Tool according to one of claims 2 to 4,
    characterized in that
    the distance between the claw (12) and the stop (25) to the rotation axis (7) by means of an adjusting device is adjustable such that helical compression springs of different inner diameter can be fixed.
  7. Tool according to one of claims 1 to 6,
    characterized in that
    on the tool (1/2) at least one and preferably two handles (26) are provided to hold the tool rotationally fixed.
  8. Tool according to one of claims 1 to 6,
    characterized in that
    the tool (1/2) has a shank (13) which is connectable to a lathe (20) and can preferably be fixed in a chuck of the lathe.
  9. Tool according to claim 8,
    characterized in that
    the shaft (13) and the mandrel (5) are integrally formed.
  10. A system for screwing helical compression springs to a helical plate spring comprising
    - a lathe (20),
    - two tools executed according to one of claims 1 to 8, wherein a helical compression spring can be fixed on each tool (1), and the one of the two tools (1) in the lathe (20) is fixed rotatable about the rotation axis (7), and is rotatable by means of the lathe (20), and the other tool (1) is fixed in a rotationally fixed axial alignment with the one tool, and a mandrel (5) is fixed in a passage of one of the two tools (1), so that by means of the system two helical compression springs (29, 30) can be screwed into one another, wherein the mandrel (5) extends through a passage (3) of the other tool (1) during screwing.
  11. System according to claim 10,
    characterized in that
    a shank (13) of one of the tools (1) is fixed in the chuck of the lathe (20).
  12. Method for screwing helical compression springs together to form a helical plate spring,
    in which a first helical compression spring (29) is fixed in a first tool (1/1) designed according to claims 1 to 8 and arranged on a mandrel (5), wherein the first tool (1/1) is fixed in the lathe (20) rotatable about the axis of rotation (7), and by means of the lathe (20) is set in a rotational movement, and a second tool (1/2), in which a helical compression spring (30) is also fixed, axially aligned with the first tool (1/1) is held against rotation, wherein by the rotational movement of the lathe (20), the two helical compression springs (29, 30) are screwed together, so that the two helical compression springs (29, 30) form a helical plate spring.
  13. A method according to claim 12,
    characterized in that
    the screwing together of the two helical compression springs is limited by a stop (25).
  14. A method according to claim 12 or 13,
    characterized in that
    the mandrel (5) is fixed to one of the two tools and during screwing extends freely rotatable through a passage (3) of the other tool (1/1, 1/2).
  15. Method according to one of claims 12 to 14,
    characterized in that
    during screwing a tensile force acting in the axial direction is exerted on the two helical compression springs, preferably by means of handles (26).
EP13169751.8A 2012-05-30 2013-05-29 Tool, system and method for the screwing of helical compression springs to a screw plate spring Active EP2669050B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL13169751T PL2669050T3 (en) 2012-05-30 2013-05-29 Tool, system and method for the screwing of helical compression springs to a screw plate spring
SI201331040T SI2669050T1 (en) 2012-05-30 2013-05-29 Tool, system and method for the screwing of helical compression springs to a screw plate spring
RS20180612A RS57276B1 (en) 2012-05-30 2013-05-29 Tool, system and method for the screwing of helical compression springs to a screw plate spring
HRP20180857TT HRP20180857T1 (en) 2012-05-30 2018-05-30 Tool, system and method for the screwing of helical compression springs to a screw plate spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012104673A DE102012104673B3 (en) 2012-05-30 2012-05-30 Tool, system and method for screwing helical compression springs to a helical plate spring

Publications (3)

Publication Number Publication Date
EP2669050A2 EP2669050A2 (en) 2013-12-04
EP2669050A3 EP2669050A3 (en) 2014-04-16
EP2669050B1 true EP2669050B1 (en) 2018-03-21

Family

ID=48576763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13169751.8A Active EP2669050B1 (en) 2012-05-30 2013-05-29 Tool, system and method for the screwing of helical compression springs to a screw plate spring

Country Status (12)

Country Link
EP (1) EP2669050B1 (en)
AT (1) AT14133U1 (en)
DE (1) DE102012104673B3 (en)
DK (1) DK2669050T5 (en)
ES (1) ES2670829T3 (en)
HR (1) HRP20180857T1 (en)
HU (1) HUE038435T2 (en)
PL (1) PL2669050T3 (en)
PT (1) PT2669050T (en)
RS (1) RS57276B1 (en)
SI (1) SI2669050T1 (en)
TR (1) TR201807521T4 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017100581A1 (en) 2017-01-13 2018-07-19 Andreas Heiko Gruner Clamping device for tensioning a coil spring

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE476852C (en) * 1929-05-29 Engel & Biermeyer Tabbed clamp for holding the end of the spring on the mandrel of coil spring winding machines
DE898143C (en) * 1946-02-28 1953-11-26 Jakob Kummli Device for winding springs on a rotating mandrel
DE2916446C2 (en) * 1979-04-24 1985-10-24 Dr. Werner Röhrs KG, 8972 Sonthofen Coil spring set
DE4100842C1 (en) * 1991-01-14 1992-05-21 Hans Dipl.-Ing. 7310 Plochingen De Kuehl Coil spring with several concentric spring element turns - has symmetrical spring elements to attain coincidence of load and geometrical axes
DE20210744U1 (en) * 2002-07-12 2003-02-06 Starkenberg, Werner, 33829 Borgholzhausen Holder for tap cutting bits has a housing with no weak points using high tensile materials

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649130A (en) * 1951-03-09 1953-08-18 Lester A Border Coil spring winder
US4253350A (en) * 1979-01-17 1981-03-03 Vincent De Tarr Garage door spring tensioning apparatus
ATE495837T1 (en) 2009-02-26 2011-02-15 Wafios Ag TOOL KIT FOR FORMING BENDING TOOLS COUPLABLE TO A TOOL UNIT OF A BENDING MACHINE FOR BENDING OR WINDING STRONG-SHAPED WORKPIECES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE476852C (en) * 1929-05-29 Engel & Biermeyer Tabbed clamp for holding the end of the spring on the mandrel of coil spring winding machines
DE898143C (en) * 1946-02-28 1953-11-26 Jakob Kummli Device for winding springs on a rotating mandrel
DE2916446C2 (en) * 1979-04-24 1985-10-24 Dr. Werner Röhrs KG, 8972 Sonthofen Coil spring set
DE4100842C1 (en) * 1991-01-14 1992-05-21 Hans Dipl.-Ing. 7310 Plochingen De Kuehl Coil spring with several concentric spring element turns - has symmetrical spring elements to attain coincidence of load and geometrical axes
DE20210744U1 (en) * 2002-07-12 2003-02-06 Starkenberg, Werner, 33829 Borgholzhausen Holder for tap cutting bits has a housing with no weak points using high tensile materials

Also Published As

Publication number Publication date
ES2670829T3 (en) 2018-06-01
DE102012104673B3 (en) 2013-08-14
HRP20180857T1 (en) 2018-06-29
EP2669050A2 (en) 2013-12-04
TR201807521T4 (en) 2018-06-21
PL2669050T3 (en) 2018-09-28
DK2669050T5 (en) 2018-06-18
EP2669050A3 (en) 2014-04-16
SI2669050T1 (en) 2018-07-31
AT14133U1 (en) 2015-05-15
RS57276B1 (en) 2018-08-31
HUE038435T2 (en) 2018-10-29
DK2669050T3 (en) 2018-06-06
PT2669050T (en) 2018-06-08

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