EP1551577A1 - Method and device for the production of a pneumatic tyre rim - Google Patents

Method and device for the production of a pneumatic tyre rim

Info

Publication number
EP1551577A1
EP1551577A1 EP03747977A EP03747977A EP1551577A1 EP 1551577 A1 EP1551577 A1 EP 1551577A1 EP 03747977 A EP03747977 A EP 03747977A EP 03747977 A EP03747977 A EP 03747977A EP 1551577 A1 EP1551577 A1 EP 1551577A1
Authority
EP
European Patent Office
Prior art keywords
flanks
contour
rim
wall thickness
chuck
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.)
Granted
Application number
EP03747977A
Other languages
German (de)
French (fr)
Other versions
EP1551577B1 (en
Inventor
Udo Friese
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WF Maschinenbau und Blechformtecknik GmbH and Co KG
Original Assignee
WF Maschinenbau und Blechformtecknik GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP1551577A1 publication Critical patent/EP1551577A1/en
Application granted granted Critical
Publication of EP1551577B1 publication Critical patent/EP1551577B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/30—Making other particular articles wheels or the like wheel rims
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49496—Disc type wheel
    • Y10T29/49503—Integral rim and disc making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49496—Disc type wheel
    • Y10T29/49504—Disc shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49524—Rim making
    • Y10T29/49529—Die-press shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49524—Rim making
    • Y10T29/49531—Roller forming

Definitions

  • the present invention relates to a method for producing a weight-optimized pneumatic tire rim according to the preamble of claim 1 and an apparatus for carrying out the method.
  • Wall thickness which is only present in the finished tire rim in the claimed areas, is reduced accordingly by extrusion.
  • the present invention is therefore based on the object of further developing a method of the generic type in such a way that the production times are shortened and thus less expensive production is possible.
  • the pipe section used as a blank has, due to production, relatively large tolerances in its wall thickness, which hitherto resulted in extrusion to a predetermined wall thickness of the flanks to the aforementioned corners of the edges.
  • the new process creates an exact, predeterminable volume of material that is available for the further processing of the flanks (length extension, contouring and bringing to predetermined wall thicknesses).
  • the longitudinal extension, which results from the partial wall thickness reduction, which is carried out by means of pressure rollers, is preferably limited by a stop which is provided all around on the outer surface of the tool inner lining and against which the respective flank rests in the end position, i.e. after the end of the pressure roller ,
  • the volume of the flanks that is defined after the pressure rolling means that their length can also be determined after the deformation has ended, taking into account the desired wall thicknesses.
  • Wall thickness equalization pushed into the drop zone, where it leads to a wall reinforcement.
  • the starting wall thickness of the pipe section can therefore be chosen to be less than the end wall thickness in the area of the deep bed zone, the
  • the final thickness in turn results from the original wall thickness and the tolerance material of the flanks.
  • the diameter of the cylindrical tube section is smaller than the largest outside diameter of the rim bed to be produced by the subsequent processing steps, whereas the diameter of the tube section corresponds to the largest diameter of the rim bed if the end-side expansion is dispensed with.
  • a device for carrying out the method is designed such that a two-part tool lining, contoured on its outer lateral surface, is provided for receiving the cylindrical tube section, the two
  • Tool lining parts are axially movable relative to each other.
  • FIGS. 1 and 2 show a further exemplary embodiment of a device for carrying out a first method step in a schematic longitudinal section.
  • This device has an inner tool chuck 2, which consists of a first chuck part 3 and a second chuck part 4, which can be moved relative to one another in the axial direction in a spring-loaded manner.
  • the outer jacket of the inner tool chuck 2 is provided with a preliminary contour 5, into which the pipe section 1 can be correspondingly pressed by means of pressing / rolling rollers 8.
  • FIG. 1 The beginning of the method can be seen in FIG. 1, in which the cylindrical tubular section 1 a lies on the outside of the tool chuck 2.
  • the pressure-dependent alz rollers 8 are used to shift tolerance-related excess material of a certain specific, flank 6-forming, rotationally symmetrical region, with equalization of the wall thickness S1, into the region of a deep bed zone 7, from which the flanks formed on both sides 6 extend under the same wall thickness S2. Both the deep bed zone 7 and the flanks 6 assume the shape predetermined by the preliminary contour 5.
  • the tolerance-related excess material leads to a thickening of the wall thickness S3 of the deep bed zone 7 compared to the original wall, while this is leveled in the area of the flanks 6 to such an extent that it corresponds, for example, to the lower tolerance measure.
  • a thickness of 3.5 + _ 0.1 is given as the initial wall thickness of the tubular cylinder la, so that the wall thickness S2 of the flanks 6 is 3.4, while the wall thickness S3 of the deep bed zone 7 can be approximately 3.85.
  • the equalization of the wall thickness in the area of the flanks 6 has led to a thickening of the deep bed zone 7 compared to the original use of material.
  • both the first chuck part 3 and the second chuck part 4 have a circumferential stop 9, on which the pipe section la and then continue
  • the precontoured rim base 1 is supported at the end in the course of the method.
  • the second chuck part 4 is adjusted with spring force until it reaches an end position, as shown in broken lines in FIG. 1, and how it moves
  • flanks 6 are further contoured while stretching outwards, as can be seen in FIG. 3.
  • this device which has at least one pressing / rolling roller 8
  • the respective different wall thicknesses of the flanks 6 can be produced.
  • one of the two flanks 6, starting from the deep bed zone 7, is brought to a wall thickness S4 by means of the pressing / rolling roller 8, which presses from the inside out, which can be 2.6, for example, with reference to the previous dimensions.
  • stops 9a are provided all around on the first and second chuck parts 3a and 4a and each form the end of the contour 5a.
  • the height of the rim well 1 and the wall thicknesses of the flanks 6 can be exactly predetermined.
  • the end regions of the flanks 6 are finished by shaping rollers 10.
  • circumferential rim flanges 11 and bosses 12 are molded on, which serve to receive a tire.
  • an inner tool chuck 2b which consists of a first chuck part 3b and a second chuck part 4b, the outside of which is at least partially shaped in accordance with the contour of the rim base 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Tires In General (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Testing Of Balance (AREA)

Abstract

The invention relates to a method for production of a weight-optimised pneumatic tyre rim. A tube section (1a), preferably produced from a welded tube is used to produce a rim bed (1) by cold forming, with rotationally symmetrical, partially different wall thicknesses and then connected to a rim inner joining surface. According to the invention, firstly the wall of the cylindrical tube section (1a), starting from both end edges, around a given rotationally symmetrical region, which forms a flank (6), is brought to a largely exact wall thickness (S2) with formation of a pre-form, whereby the excess material of the flank (6), outside the tolerance range, is displaced in to a deep bed zone (7) between the two flanks (6) and then the flanks (6) are shaped by drawing to the free edge region using pressure, optionally varying in the thickness thereof (S4, SS) and reduced to a given mass.

Description

Verfahren und Vorrichtung zur Herstellung einer Luftreifenfelge Method and device for manufacturing a pneumatic tire rim
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer gewichtsoptimierten Luftreifenfelge gemäß dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zur Durchführung des Verfahrens.The present invention relates to a method for producing a weight-optimized pneumatic tire rim according to the preamble of claim 1 and an apparatus for carrying out the method.
Zur Herstellung einer solchen Luftreifenfeige ist es beispielsweise aus der DE-OS 26 47 464 bekannt, auf einem längsgeschweißten, zylindrischen Rohrabschnitt, der auch als Bandage bezeichnet wird, durch Andrücken mindestens einer rotierenden Drück- oder Streckrolle in Korrespondenz mit einem Werkzeug-Innenfutter dieTo produce such a pneumatic tire fig, it is known, for example from DE-OS 26 47 464, on a longitudinally welded, cylindrical tube section, which is also referred to as a bandage, by pressing on at least one rotating pressing or stretching roller in correspondence with a tool inner lining
Ausgangswandstärke, also die des Rohrabschnitts, zu verdünnen unter gleichzeitiger Längenstreckung, so daß sich partiell unterschiedliche, funktionsabhängig vorgegebene Wanddicken über rotationssymmetrische Bereiche ergeben.Output wall thickness, that of the pipe section, to be diluted with simultaneous elongation, so that there are partially different, function-dependent predetermined wall thicknesses over rotationally symmetrical areas.
So wird üblicherweise die Felgenschüssel mit dem Felgenbett im Bereich einesSo is usually the rim bowl with the rim well in the area of
Tiefbettes verschweißt, wozu dies eine bestimmte Wanddicke haben muß.Welded low bed, for which this must have a certain wall thickness.
Aufgrund von geforderten Gewichtsoptimierungen sollen die Bereiche, die, im Gegensatz zu dem genannten Schweißbereich, keiner besonderen Beanspruchung unterliegen, so dünn wie möglich ausgebildet sein, so daß die ursprünglicheDue to the required weight optimization, the areas which, in contrast to the welding area mentioned, are not subject to any particular stress should be as thin as possible, so that the original
Wanddicke, die bei der fertigen Luftreifenfelge lediglich in den genannten beanspruchten Bereichen noch vorliegt, durch Fließpressen entsprechend reduziert wird.Wall thickness, which is only present in the finished tire rim in the claimed areas, is reduced accordingly by extrusion.
Allerdings ist dies mit einer Reihe von Nachteilen verbunden. So sind beispielsweise mehrere Arbeitsschritte erforderlich, um die Wandstärkenreduzierung zu erreichen, was zu relativ hohen Fertigungszeiten und sich daraus ergebenden hohen Fertigungskosten führt. Hierzu trägt auch bei, daß die Ränder der Flanken durch das Fließpressen, also das Strecken des Materials, „zipfelig" werden, d. h., es entsteht eine im weitesten Sinne ausgefranste Kante, die eine Nachbearbeitung erforderlich macht.However, this has a number of disadvantages. For example, several work steps are required to achieve the reduction in wall thickness, which leads to relatively long production times and the resulting high production costs. This also contributes to the fact that the edges of the flanks become "lumpy" as a result of the extrusion, that is to say the stretching of the material, that is to say an edge which is frayed in the broadest sense and which requires reworking.
Insbesondere unter dem Gesichtspunkt, daß solche Luftreifenfelgen als Serienteile in großen Stückzahlen hergestellt werden, kommt den genannten Nachteilen eine besondere Bedeutung zu.In particular from the point of view that such pneumatic tire rims are produced in large quantities as series parts, the disadvantages mentioned are of particular importance.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art so weiter zu entwickeln, daß die Herstellungszeiten verkürzt werden und damit eine kostengünstigere Fertigung möglich ist.The present invention is therefore based on the object of further developing a method of the generic type in such a way that the production times are shortened and thus less expensive production is possible.
Diese Aufgabe wird durch ein Verfahren gelöst, das die Merkmale des Anspruchs 1 aufweist sowie durch eine Vorrichtung mit den Merkmalen des Anspruchs 7.This object is achieved by a method which has the features of claim 1 and by a device with the features of claim 7.
Der als Rohling eingesetzte Rohrabschnitt weist fertigungsbedingt in seiner Wandstärke relativ große Toleranzen auf, die bisher beim Fließpressen auf eine vorbestimmte Wandstärke der Flanken zu den genannten Zipfelungen der Ränder führte.The pipe section used as a blank has, due to production, relatively large tolerances in its wall thickness, which hitherto resulted in extrusion to a predetermined wall thickness of the flanks to the aforementioned corners of the edges.
Durch das neue Verfahren hingegen wird ein exaktes, vorherbestimmbares Materialvolumen geschaffen, das für die weitere Bearbeitung der Flanken (Längenstreckung, Konturierung und Bringen auf vorbestimmte Wandstärken) zur Verfügung steht.The new process, on the other hand, creates an exact, predeterminable volume of material that is available for the further processing of the flanks (length extension, contouring and bringing to predetermined wall thicknesses).
Dabei wird die Längenstreckung, die sich aus der mittels Drückwalzen durchgeführten, gegebenenfalls partiellen Wandstärkenreduzierung ergibt, vorzugsweise durch einen Anschlag begrenzt, der an der Mantelfläche des Werkzeug- Innenfutters umlaufend vorgesehen ist und an dem die jeweilige Flanke in Endstellung, also nach Beendigung des Drückwalzens anliegt. Durch das nach dem Drückwalzen definiert vorliegende Volumen der Flanken ist auch deren Länge nach Beendigung der Verformung, unter Berücksichtigung der gewünschten Wandstärken, bestimmbar.The longitudinal extension, which results from the partial wall thickness reduction, which is carried out by means of pressure rollers, is preferably limited by a stop which is provided all around on the outer surface of the tool inner lining and against which the respective flank rests in the end position, i.e. after the end of the pressure roller , The volume of the flanks that is defined after the pressure rolling means that their length can also be determined after the deformation has ended, taking into account the desired wall thicknesses.
Hierdurch ist nicht nur eine maßlich genaue Fertigung des Felgenbettes möglich, sondern es kann auch auf das nachträgliche Besäumen der Ränder verzichtet werden, da aufgrund des bei jedem als Serienprodukt herzustellenden Felgenbettes gleiche Flanken- Volumina nach dem ersten Verfahrensschritt vorliegen.This not only enables a dimensionally accurate manufacture of the rim base, but it is also possible to dispense with the subsequent trimming of the edges, since the same flank volumes are present after the first process step for each rim base to be produced as a series product.
Das sich aus den Dickentoleranzen ergebende überschüssige Material wird bei derThe excess material resulting from the thickness tolerances is used in the
Wandstärkenegalisierung in die Tiefbettzone geschoben, wo es zu einer Wandverstärkung führt.Wall thickness equalization pushed into the drop zone, where it leads to a wall reinforcement.
Als Ausgangswandstärke des Rohrabschnitts kann daher eine solche gewählt wer- den, die geringer ist als die Endwandstärke im Bereich der Tiefbettzone, derenThe starting wall thickness of the pipe section can therefore be chosen to be less than the end wall thickness in the area of the deep bed zone, the
Enddicke sich wiederum ergibt aus der Ursprungs-Wandstärke und dem zugetragenen Toleranz-Material der Flanken.The final thickness in turn results from the original wall thickness and the tolerance material of the flanks.
Nach einem weiteren Gedanken der Erfindung ist vorgesehen, daß vor der Egali- sierung der Wandstärke des dann noch zylindrischen Rohrabschnitts als Ausgangprodukt dieser an zumindest einer, vorzugsweise jedoch beiden Endseiten aufgeweitet wird.According to a further idea of the invention, it is provided that, before the leveling of the wall thickness of the then cylindrical tube section as the starting product, it is widened on at least one, but preferably both, end sides.
In diesem Fall ist der Durchmesser des zylindrischen Rohrabschnitts kleiner als der größte Außendurchmesser des durch die nachfolgenden Bearbeitungsschritte herzustellenden Felgenbetts, wohingegen der Durchmesser des Rohrabschnitts dem größten Durchmesser des Felgenbetts entspricht, wenn auf die endseitige Aufweitung verzichtet wird.In this case, the diameter of the cylindrical tube section is smaller than the largest outside diameter of the rim bed to be produced by the subsequent processing steps, whereas the diameter of the tube section corresponds to the largest diameter of the rim bed if the end-side expansion is dispensed with.
Da das Materialvolumen der Felge in jedem Fall gleich bleibt, ist entsprechend bei geringerem Durchmesser des Emsatz-Rohrabschnitts eine größere Breite oder Wandstärke des Rohrabschnitts vorzusehen. Die genannte Aufweitung des Rohrabschnitts hat fertigungstechnische Vorteile, da beim anschließenden Drücken zur Konturierung ein unkontrolliertes Auswandern der Endbereiche verhindert wird.Since the material volume of the rim remains the same in any case, a larger width or wall thickness of the pipe section must be provided accordingly with a smaller diameter of the Emsatz pipe section. The widening of the pipe section mentioned has advantages in terms of production technology, since the subsequent pressing for contouring prevents an uncontrolled migration of the end regions.
Eine Vorrichtung zur Durchführung des Verfahrens ist so ausgebildet, daß zur Aufnahme des zylindrischen Rohrabschnitts ein zweiteiliges, an seiner äußeren Mantelfläche konturiertes Werkzeug-Innenfutter vorgesehen ist, wobei die beidenA device for carrying out the method is designed such that a two-part tool lining, contoured on its outer lateral surface, is provided for receiving the cylindrical tube section, the two
Werkzeug-Innenfutter-Teile relativ zueinander axial bewegbar sind.Tool lining parts are axially movable relative to each other.
Weitere vorteilhafte Ausbildungen sowohl des Verfahrens wie auch der Vorrichtung sind in den Unteransprüchen gekennzeichnet.Further advantageous developments of both the method and the device are characterized in the subclaims.
Das erfindungsgemäße Verfahren wird nachfolgend anhand der Zeichnungen, die ein Ausfuhrungsbeispiel einer Vorrichtung zur Durchführung des Verfahrens zeigen, nochmals beschrieben.The method according to the invention is described again below with reference to the drawings, which show an exemplary embodiment of a device for carrying out the method.
Es zeigen:Show it:
Figurencharacters
1 und 2 eine Vorrichtung zur Durchführung eines ersten Verfahrensschritts, jeweils im Längsschnitt dargestellt,1 and 2 a device for carrying out a first method step, each shown in longitudinal section,
Figurencharacters
3 und 4 jeweils eine weitere Vorrichtung für jeweils folgende Verfahrensschritte, ebenfalls im Längsschnitt gezeigt,3 and 4 each show a further device for the following method steps, also shown in longitudinal section,
Figur 5 ein weiteres Ausfuhrungsbeispiel einer Vorrichtung zur Durchführung eines ersten Verfahrensschritts in einem schematischen Längsschnitt. Eine in den Figuren 1 und 2 gezeigte Vorrichtung zur Herstellung einer gewichtsoptimierten Luftreifenfeige, bei der aus einem zylindrischen Rohrabschnitt la, vorzugsweise aus Stahl, durch Kaltverformen ein Felgenbett 1 mit rotationssymmetrisch partiell unterschiedlichen Wanddicken hergestellt wird, das anschließend mit einer nicht dargestellten Felgenschüssel verbunden wird, vorzugsweise durch5 shows a further exemplary embodiment of a device for carrying out a first method step in a schematic longitudinal section. A device shown in FIGS. 1 and 2 for producing a weight-optimized pneumatic tire fig, in which a rim base 1 with rotationally symmetrical partially different wall thicknesses is produced from a cylindrical tube section 1 a, preferably made of steel, which is then connected to a rim bowl (not shown), preferably by
Verschweißen.Welding.
Diese Vorrichtung weist ein Werkzeuginnenfutter 2 auf, das aus einem ersten Futterteil 3 und einem zweiten Futterteil 4 besteht, die in axialer Richtung federbelas- tet relativ zueinander bewegbar sind.This device has an inner tool chuck 2, which consists of a first chuck part 3 and a second chuck part 4, which can be moved relative to one another in the axial direction in a spring-loaded manner.
Der Außenmantel des Werkzeuginnenfutters 2 ist mit einer Vorkontur 5 versehen, in die mittels Drück/Walz-Rollen 8 der Rohrabschnitt 1 entsprechend eindrückbar ist.The outer jacket of the inner tool chuck 2 is provided with a preliminary contour 5, into which the pipe section 1 can be correspondingly pressed by means of pressing / rolling rollers 8.
Aus der Figur 1 ist der Beginn des Verfahrens erkennbar, bei dem der zylinder- förmige Rohrabschnitt la außenseitig an dem Werkzeuginnenfutter 2 anliegt.The beginning of the method can be seen in FIG. 1, in which the cylindrical tubular section 1 a lies on the outside of the tool chuck 2.
Ausgehend von den beiden Endseiten des Rohrabschnitts la wird mittels der DrückΛ¥alz-Rollen 8 toleranzbedingtes Überschußmaterial eines jeweiligen bestimmten, eine Flanke 6 bildenden rotationssymmetrischen Bereichs unter Egalisierung der Wandstärke Sl in den Bereich einer Tiefbettzone 7 verschoben, von dem aus sich beidseitig die gebildeten Flanken 6 unter gleicher Wandstärke S2 erstrecken. Dabei nehmen sowohl die Tiefbettzone 7 wie auch die Flanken 6 die von der Vorkontur 5 vorbestimmte Form an.Starting from the two end sides of the pipe section 1 a, the pressure-dependent alz rollers 8 are used to shift tolerance-related excess material of a certain specific, flank 6-forming, rotationally symmetrical region, with equalization of the wall thickness S1, into the region of a deep bed zone 7, from which the flanks formed on both sides 6 extend under the same wall thickness S2. Both the deep bed zone 7 and the flanks 6 assume the shape predetermined by the preliminary contour 5.
Das toleranzbedingte Überschußmaterial führt zu einer Verdickung der Wandstärke S3 der Tiefbettzone 7 gegenüber der ursprünglichen Wandung, während diese im Bereich der Flanken 6 so weit egalisiert ist, daß sie beispielsweise dem unteren Toleranzmaß entspricht. Beispielhaft wird als Ausgangs Wandstärke des Rohrzylinders la eine Dicke von 3,5 +_ 0,1 angegeben, so daß die Wandstärke S2 der Flanken 6 3,4 ist, während die Wanddicke S3 der Tiefbettzone 7 etwa 3,85 sein kann. Hier hat die Egalisierung der Wandstärke im Bereich der Flanken 6 zu einer Verdickung der Tiefbettzone 7 gegenüber dem ursprünglichen Materialeinsatz geführt.The tolerance-related excess material leads to a thickening of the wall thickness S3 of the deep bed zone 7 compared to the original wall, while this is leveled in the area of the flanks 6 to such an extent that it corresponds, for example, to the lower tolerance measure. For example, a thickness of 3.5 + _ 0.1 is given as the initial wall thickness of the tubular cylinder la, so that the wall thickness S2 of the flanks 6 is 3.4, while the wall thickness S3 of the deep bed zone 7 can be approximately 3.85. Here, the equalization of the wall thickness in the area of the flanks 6 has led to a thickening of the deep bed zone 7 compared to the original use of material.
Um den Rohrabschnitt la in axialer Richtung zu halten und um zu verhindern, daß beim Walzen eine axiale Streckung erfolgt, weisen sowohl das erste Futterteil 3 wie auch das zweite Futterteil 4 einen umlaufenden Anschlag 9 auf, an dem sich zunächst der Rohrabschnitt la und im weiteren Verlauf des Verfahrens das vor- konturierte Felgenbett 1 endseitig abstützt.In order to keep the pipe section la in the axial direction and to prevent axial stretching during rolling, both the first chuck part 3 and the second chuck part 4 have a circumferential stop 9, on which the pipe section la and then continue The precontoured rim base 1 is supported at the end in the course of the method.
Entsprechend der durch die Vorkonturierung erfolgenden Längenverkürzung des Rohrabschnitts la wird das zweite Futterteil 4 mit Federkraft nachgeführt, bis es eine Endstellung erreicht, wie sie in Figur 1 gestrichelt gezeigt ist und wie sie dieCorresponding to the shortening of the length of the pipe section 1 a resulting from the pre-contouring, the second chuck part 4 is adjusted with spring force until it reaches an end position, as shown in broken lines in FIG. 1, and how it moves
Figur 2 wiedergibt.Figure 2 reproduces.
Im folgenden Verfahrensschritt werden die Flanken 6 unter Streckung nach außen hin weiter konturiert, wie dies in der Figur 3 erkennbar ist.In the following process step, the flanks 6 are further contoured while stretching outwards, as can be seen in FIG. 3.
Hier ist ein weiteres Werkzeuginnenfutter 2a dargestellt, dessen erstes und zweites Futterteil 3a bzw. 4a gegenüber dem ersten und zweiten Futterteil 3 bzw. 4 nach Figuren 1 und 2 einen veränderten und gestreckten Verlauf der Kontur 5a aufweisen.Here, a further inner tool chuck 2a is shown, the first and second chuck parts 3a and 4a of which, compared to the first and second chuck parts 3 and 4 according to FIGS. 1 and 2, have a modified and elongated profile of the contour 5a.
Mittels dieser Vorrichtung, die zumindest eine Drück/Walz-Rolle 8 aufweist, sind die jeweils unterschiedlichen Wandstärken der Flanken 6 herstellbar.By means of this device, which has at least one pressing / rolling roller 8, the respective different wall thicknesses of the flanks 6 can be produced.
Unter Längenstreckung wird eine der beiden Flanken 6, ausgehend von der Tief- bettzone 7, mittels der von innen nach außen drückenden Drück/Walz-Rolle 8 auf eine Wanddicke S4 gebracht, die unter Bezugnahme auf die vorherigen Maßangaben beispielsweise 2,6 sein kann. Die gegenüber liegende Flanke 6 hingegen wird so weit gestreckt, daß sich innerhalb der Flanke 6 ein rotationssymmetrischer Bereich mit der Wandstärke ebenfalls S4 = 2,6 und ein anderer Bereich mit der Wandstärke S5 = 1,8 ergibt.With longitudinal stretching, one of the two flanks 6, starting from the deep bed zone 7, is brought to a wall thickness S4 by means of the pressing / rolling roller 8, which presses from the inside out, which can be 2.6, for example, with reference to the previous dimensions. The opposite flank 6, on the other hand, is stretched so far that within the flank 6 there is a rotationally symmetrical area with the wall thickness also S4 = 2.6 and another area with the wall thickness S5 = 1.8.
Endseitig wird die Verformung der Flanken 6 durch Anschläge 9a begrenzt, die umlaufend am ersten bzw. zweiten Futterteil 3a bzw. 4a vorgesehen sind und jeweils den Abschluß der Kontur 5a bilden.At the end, the deformation of the flanks 6 is limited by stops 9a, which are provided all around on the first and second chuck parts 3a and 4a and each form the end of the contour 5a.
Das zuvor durch die Egalisierung der Flanken 6 genau bestimmbare Volumen findet sich wieder in der nun demgegenüber größeren axialen Erstreckung und der teilweise partiell verringerten Wandstärke.The volume that could previously be exactly determined by leveling the flanks 6 is again found in the now larger axial extension and the partially partially reduced wall thickness.
In jedem Fall sind die Höhe des Felgenbettes 1 und die Wandstärken der Flanken 6 exakt vorherbestimmbar.In any case, the height of the rim well 1 and the wall thicknesses of the flanks 6 can be exactly predetermined.
In einer folgenden Weiterbearbeitung des Felgenbettes 1, wie sie in der Figur 4 gezeigt ist, werden die Endbereiche der Flanken 6 durch Formrollen 10 endbearbeitet. In an sich bekannter Weise werden hierbei umlaufende Felgenhörner 11 und Buckel 12 (humps) angeformt, die der Aufnahme eines Reifens dienen.In a subsequent further processing of the rim well 1, as shown in FIG. 4, the end regions of the flanks 6 are finished by shaping rollers 10. In a manner known per se, circumferential rim flanges 11 and bosses 12 (humps) are molded on, which serve to receive a tire.
Auch hier ist ein Werkzeuginnenfutter 2b vorgesehen, das aus einem ersten Futterteil 3b und einem zweiten Futterteil 4b besteht, die außenseitig zumindest teilweise der Kontur des Felgenbettes 1 entsprechend geformt sind.Here too, an inner tool chuck 2b is provided, which consists of a first chuck part 3b and a second chuck part 4b, the outside of which is at least partially shaped in accordance with the contour of the rim base 1.
In der Figur 5 ist erkennbar, daß der größte Durchmesser der Futterteile 3, 4 im Bearbeitungsbereich bzw. im Anlagebereich mit dem Rohrabschnitt la größer ist als der lichte Durchmesser dieses Rohrabschnitts la, so daß der zunächst zylindrische Rohrabschnitt la mit seinen Endkanten an der jeweils zugeordneten Vorkon- tur 5 der Futterteile 3, 4 anliegt. Bei einem axialen Zustellen der Futterteile 3, 4 zueinander werden die Endbereiche des Rohrabschnitts la jeweils zu einer Aufweitung lb verformt.In Figure 5 it can be seen that the largest diameter of the chuck parts 3, 4 in the processing area or in the contact area with the pipe section la is larger than the clear diameter of this pipe section la, so that the initially cylindrical pipe section la with its end edges on the respectively assigned Pre-contour 5 of the chuck parts 3, 4 is present. When the chuck parts 3, 4 are axially fed towards one another, the end regions of the tube section 1 a are each deformed into an expansion 1 b.
Die weitere Bearbeitung, d. h. die Konturierung auch in den Endbereichen erfolgt, wie beschrieben, mittels der Drück/Walz-Rollen 8. The further processing, that is to say the contouring also in the end regions, takes place, as described, by means of the pressing / rolling rollers 8.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Felgenbett la Rohrabschnitt lb Aufweitung1 rim bed la pipe section lb widening
2 Werkzeug-Innenfutter2 tool lining
2a Werkzeug-Innenfutter2a tool lining
3 erstes Futterteil3 first lining part
3a erstes Futterteil3a first lining part
4 zweites Futterteil4 second lining part
4a zweites Futterteil4a second lining part
5 Vorkontur5 pre-contour
5a Kontur5a contour
6 Flanke6 flank
7 Tiefbett-Zone7 low bed zone
8 Driick/Walz-Rolle8 Press / roller
9 Anschlag9 stop
9a Anschlag9a stop
10 Formrolle10 form roll
11 Felgenhorn11 rim flange
12 Buckel 12 humps

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer gewichtsoptimierten Luftreifenfelge, bei dem aus einem vorzugsweise aus einem geschweißten Rohr hergestellten Rohrabschnitt (la) durch Kaltverformen ein Felgenbett (1) mit rotationssymmetrisch partiell unterschiedlichen Wanddicken hergestellt und anschließend mit einer Felgenschüssel verbunden wird, dadurch gekennzeichnet, daß die Wandung des Rohrabschnitts (la), ausgehend von den beiden Endseiten her, jeweils über einen bestimmten rotationssymmetrischen Bereich, der eine Flanke (6) bildet, unter Bildung einer Vorkontur auf eine weitgehend exakte Wandstärke (S2) gebracht wird, wobei das toleranzbedingte Überschußmaterial der Flanken (6) in eine Tiefbettzone (7) zwischen den beiden Flanken (6) geschoben wird, und daß danach die Flanken (6) durch Drückwalzen unter Streckung zum freien Randbereich hin konturiert und in ihrer Dicke (S4, S5), gegebenenfalls partiell unterschiedlich, auf ein vorbestimmtes Maß reduziert werden.1. A method for producing a weight-optimized pneumatic tire rim, in which a rim well (1) with rotationally symmetrical partially different wall thicknesses is produced from a tube section (la), which is preferably made from a welded tube, and then connected to a rim bowl, characterized in that the wall of the pipe section (la), starting from the two end sides, is brought to a largely exact wall thickness (S2) over a certain rotationally symmetrical area, which forms a flank (6), forming a pre-contour, the tolerance-related excess material of the flanks ( 6) is pushed into a deep bed zone (7) between the two flanks (6), and that the flanks (6) are then contoured by spinning rollers with stretching to the free edge area and their thickness (S4, S5), possibly partially different, on a predetermined amount can be reduced.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß vor der Egalisierung der Wandstärke (Sl) der zylindrische Rohrabschnitt (la) an zumindest ei- ner, vorzugsweise beiden Endseiten aufgeweitet wird.2. The method according to claim 1, characterized in that before equalizing the wall thickness (Sl), the cylindrical tube section (la) is widened on at least one, preferably both end sides.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Flanken (6) bei der Streckung mit ihren Stirnseiten gegen einen Anschlag (9a) gedrückt werden.3. The method according to any one of the preceding claims, characterized in that the flanks (6) are pressed with their end faces against a stop (9a) during stretching.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Vorkonturierung der Flanken (6) und deren Egalisierung der Wandstärke (Sl) durch Walzen erfolgt.4. The method according to any one of the preceding claims, characterized in that the pre-contouring of the flanks (6) and their leveling of the wall thickness (Sl) is carried out by rolling.
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das toleranzbedingte Überschußmaterial der Flanken (6) für eine weitgehend gleichmäßige Verdickung der Wandstärke (S3) des Tiefbettes (7) genutzt wird.5. The method according to any one of the preceding claims, characterized in that the tolerance-related excess material of the flanks (6) for one largely uniform thickening of the wall thickness (S3) of the deep bed (7) is used.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeich- net, daß das Felgenbett (1) während der Streckung der Flanken (6) zu einer6. The method according to any one of the preceding claims, characterized in that the rim well (1) during the stretching of the flanks (6) to one
Endkontur geformt wird,Final contour is formed,
7. Verfahren nacheinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die freien Endbereiche der Flanken (6) nach deren Streckung durch Formrollen endbearbeitet werden.7. The method according to any one of the preceding claims, characterized in that the free end regions of the flanks (6) are finished by stretching them after they have been stretched.
8. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß zur Vorkonturierung des Felgenbettes (1) und Egalisierung der Wandstärke der Flanken (6) ein Werkzeug-Innenfutter (2) vorgesehen ist, das ein erstes Futterteil (3) und ein zweites Futterteil (4) aufweist, die in axialer Richtung relativ zueinander bewegbar sind und deren äußere Mantelflächen eine Vorkontur (5) aufweisen.8. A device for performing the method according to claim 1, characterized in that for pre-contouring the rim well (1) and equalizing the wall thickness of the flanks (6) a tool inner lining (2) is provided, which has a first lining part (3) and a second lining part (4) which are movable in the axial direction relative to each other and whose outer lateral surfaces have a pre-contour (5).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der größte Durchmesser der Futterteile (3, 4) im Bearbeitungsbereich größer ist als der lichte Durchmesser des zunächst zylindrischen Rohrabschnitts (la).9. The device according to claim 8, characterized in that the largest diameter of the chuck parts (3, 4) in the machining area is larger than the clear diameter of the initially cylindrical tube section (la).
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Vorkontur (5) durch umlaufende Anschläge (9) in Form einer Kante begrenzt ist.10. The device according to claim 8, characterized in that the preliminary contour (5) is delimited by circumferential stops (9) in the form of an edge.
11. Vorrichtung nach einem der Ansprüche 8-10, dadurch gekennzeichnet, daß das axial bewegbare Futterteil (3) oder (4) federbelastet gegen das andere Futterteil (3) oder (4) bewegbar ist.11. Device according to one of claims 8-10, characterized in that the axially movable chuck part (3) or (4) is spring-loaded against the other chuck part (3) or (4) can be moved.
12. Vorrichtung nach Ansprach 11, dadurch gekennzeichnet, daß ein weiteres12. The device according spoke 11, characterized in that another
Werkzeug-Innenfutter (2a) vorgesehen ist, das aus einem ersten Futterteil (3a) und einem zweiten Futterteil (4a) besteht und das mantelseitig eine Kontur (5a) aufweist, die der Kontur des fertigen Felgenbetts (1) im Bereich der Flanken (6) entspricht.Tool inner chuck (2a) is provided which consists of a first chuck part (3a) and a second chuck part (4a) and which has a contour (5a) on the casing side has, which corresponds to the contour of the finished rim well (1) in the region of the flanks (6).
13. Vorrichtung nach einem der Ansprüche 8-12, dadurch gekennzeichnet, daß die Kontur (5a) endseitig durch jeweils einen umlaufenden Anschlag (9a) begrenzt ist.13. Device according to one of claims 8-12, characterized in that the contour (5a) is delimited at the ends by a circumferential stop (9a).
14. Vorrichtung nach einem der Ansprüche 8-13, dadurch gekennzeichnet, daß mindestens eine Drück/Walz-Rolle (8) vorgesehen ist, mit der der Rohrab- schnitt (la) in die Vorkontur (5) bzw. die Kontur (5a) eindrückbar ist.14. Device according to one of claims 8-13, characterized in that at least one pressing / rolling roller (8) is provided, with which the pipe section (la) into the preliminary contour (5) or the contour (5a) is impressible.
15. Vorrichtung nach einem der Ansprüche 8-14, dadurch gekennzeichnet, daß Formrollen (10) vorgesehen sind, mit denen die Endbereiche des konturierten Felgenbetts bearbeitbar sind. 15. Device according to one of claims 8-14, characterized in that form rollers (10) are provided with which the end regions of the contoured rim well can be machined.
EP03747977A 2002-10-17 2003-09-06 Method and device for the production of a pneumatic tyre rim Expired - Lifetime EP1551577B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248356A DE10248356A1 (en) 2002-10-17 2002-10-17 Method and device for producing a weight-optimized pneumatic tire rim
DE10248356 2002-10-17
PCT/EP2003/009912 WO2004035243A1 (en) 2002-10-17 2003-09-06 Method and device for the production of a pneumatic tyre rim

Publications (2)

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EP1551577A1 true EP1551577A1 (en) 2005-07-13
EP1551577B1 EP1551577B1 (en) 2007-04-25

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Application Number Title Priority Date Filing Date
EP03747977A Expired - Lifetime EP1551577B1 (en) 2002-10-17 2003-09-06 Method and device for the production of a pneumatic tyre rim

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US (1) US7774938B2 (en)
EP (1) EP1551577B1 (en)
AT (1) ATE360486T1 (en)
AU (1) AU2003267055A1 (en)
CA (1) CA2501179C (en)
DE (3) DE10248356A1 (en)
ES (1) ES2286452T3 (en)
WO (1) WO2004035243A1 (en)

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JP5221894B2 (en) * 2007-05-08 2013-06-26 中央精機株式会社 Wheel rim forming device for vehicles
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DE202018100889U1 (en) 2018-02-16 2018-04-24 Leifeld Metal Spinning Ag forming machine

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US7774938B2 (en) 2010-08-17
DE10248356A1 (en) 2004-04-29
CA2501179A1 (en) 2004-04-29
DE50307145D1 (en) 2007-06-06
ATE360486T1 (en) 2007-05-15
DE20314146U1 (en) 2003-11-13
EP1551577B1 (en) 2007-04-25
US20060123629A1 (en) 2006-06-15
WO2004035243A1 (en) 2004-04-29
ES2286452T3 (en) 2007-12-01
CA2501179C (en) 2008-09-16
AU2003267055A1 (en) 2004-05-04

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