EP1181119B1 - Method and device for flow turning - Google Patents

Method and device for flow turning Download PDF

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Publication number
EP1181119B1
EP1181119B1 EP00938668A EP00938668A EP1181119B1 EP 1181119 B1 EP1181119 B1 EP 1181119B1 EP 00938668 A EP00938668 A EP 00938668A EP 00938668 A EP00938668 A EP 00938668A EP 1181119 B1 EP1181119 B1 EP 1181119B1
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EP
European Patent Office
Prior art keywords
flow
rim
workpiece
wall thickness
forming units
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.)
Expired - Lifetime
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EP00938668A
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German (de)
French (fr)
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EP1181119A2 (en
Inventor
Günter POLLKÖTTER
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Leico GmbH and Co Werkzeugmaschinenbau
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Leico GmbH and Co Werkzeugmaschinenbau
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Publication of EP1181119A2 publication Critical patent/EP1181119A2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • B21H1/10—Making articles shaped as bodies of revolution rings of restricted axial length rims for pneumatic tyres
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/182—Rolling annular grooves

Definitions

  • the invention relates to a device for the pressure rolling of Pipe elements for the production of rims according to the preamble of claim 1.
  • Such a device for the production of rims is from known from DE-A-198 08 106.
  • a common robot is used for the workpieces, which can operate two spinning roller units.
  • Vehicle wheels are currently mainly made of steel or a light metal, especially an aluminum alloy manufactured.
  • vehicle wheels Compared to steel vehicle wheels, vehicle wheels have made of light metal the advantage that the lower specific weight of the light metal to vehicle wheels with a relatively small mass.
  • the task is accomplished by a device with the features of claim 1 or by using a method solved this device with the features of claim 11.
  • At least two spinning roll units are provided, which are combined in a processing station that a common feed device is provided by which workpieces for the at least two spinning roll units are fed, and that a common discharge device is provided by which workpieces from the at least two spinning roller units can be removed.
  • the pressure roller units in the Machining station with their main spindles parallel to each other are arranged. This allows the work pieces particularly easy to feed or press roll units lead away from the spinning roller units.
  • main spindles Spinning roll units at a uniform distance from each other are arranged.
  • the feeding and removal of the workpieces is designed to be particularly simple in this way.
  • the feed device for each press roll unit each comprises a feed member. This allows the workpieces to be parallel fed and taken up by the spinning roll units can and delivered in parallel by the pressure roller units and can be dissipated. This makes one special efficient production of rims achieved.
  • a central control unit is provided, through which the processing and / or feeding and / or removal of the workpieces is controllable. On In this way, individual process steps of the or removal and processing of the workpieces control each other and thereby control particularly safely.
  • the pressure rolling units, the feeders and / or laxatives as uniform Modules are formed.
  • this makes it easy Way an adaptation of a machine to customer requirements possible by putting together an appropriate number of modules becomes.
  • a failed or the module to be serviced easily and quickly with a replacement module be replaced so that a longer production loss can be avoided.
  • the modular Construction also has cost advantages in the manufacture of the Machine.
  • the reduction in wall thickness of the workpiece is formed by counter-rotating press rolls becomes.
  • This special pressure rolling process flows the material of the workpiece against the axial feed direction and is axially elongated.
  • that has Counter-rotating press rolls have the advantage that they are particularly high Strain hardening can be achieved, so that a very large Strength of the material is achieved. This allows the Setting particularly thin wall thicknesses of the rim, which the Vehicle wheel mass further reduced.
  • the pipe section can be easily attached to the rolling mandrel is. For example, in the case of synchronous spinning rolling is a Well formed on the pipe section required, the bottom by means of tailstock force and pressure disc on the free Roll mandrel end is pressed.
  • the counter-rotating pressure rolling has the advantage that the workpiece elongation is not from the long support stroke and the roll dome length is limited. This can be a conversion of the Press rolling machine, e.g. Exchange of the mandrel for production of rims of different widths, if the rim widths vary within certain limits.
  • Another preferred embodiment of the The method provides that at least in an axial central region of the workpiece set a wall thickness that is larger than the adjacent areas. On in this way it is in the area adjacent to the central area Areas the wall thickness of the material is reduced so far that with a certain required resilience of the Rim the smallest possible rim mass is achieved. In contrast, there is sufficient material in the middle area Available so that a secure welding of a wheel bowl is possible.
  • a further preferred embodiment of the invention provides before that in each area of the two free ends of the workpiece a wall thickness is set that is larger than the adjacent workpiece areas.
  • a wall thickness is set that is larger than the adjacent workpiece areas.
  • the area of the two free Ends are each formed into a rim flange. To this Way can rim horns with the required high generate mechanical resilience, while at the same time the areas adjacent to the rim flanges less Wall thickness is possible.
  • a preferred embodiment of the method stipulates that in the areas leading to the rim shoulders are shaped, the wall thickness of the workpiece defined reduced and the strength of the steel material is specifically increased. This will help you lose weight the rim reduces the wall thickness, whereby by the molding of the rim shoulders the strength of the steel material due to the onset of work hardening is increased. This makes it possible to withstand high loads of the rim significantly reduce its mass.
  • Another embodiment of the process provides that in at least one area, which leads to a Rim shoulder is molded, a portion to one Rim hump is molded.
  • the wall thickness of the Workpiece in the partial area of the rim hump to be formed be chosen accordingly.
  • Figures 1 to 3 are cross sections of the workpiece shown along cross-sectional planes.
  • the cross-sectional planes run parallel to the axis of rotation of the workpiece and include it. by virtue of the rotational symmetry of the represented Workpiece around its axis of rotation is in the in the Figures 1 to 3 shown cross sections only one Side of the cross section through the workpiece along the Cross-sectional level shown.
  • FIG 2 is a cross section through that shown in Figure 1 Workpiece 10 after the defined reduction of the Wall thickness and axial lengths shown.
  • Example was in an axial central region 11 of the Workpiece 10 leave the initial wall thickness while the adjacent areas that form the rim shoulders should be reduced in wall thickness by spinning rollers were.
  • 14 of the free ends Workpiece 10 for the rim flanges also the initial wall thickness leave.
  • pressure rolling was also specifically Strength and axial length of the intermediate form set.
  • Figure 3 shows a cross section through that shown in Figure 2 Workpiece after forming a rim profile.
  • the axial center area 11 was cut through the rim profile is drawn radially deepest, wherein a rim well 16 is formed with a large wall thickness has been.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Drückwalzen von Rohrelementen zur Herstellung von Felgen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for the pressure rolling of Pipe elements for the production of rims according to the preamble of claim 1.

Eine solche Vorrichtung zur Herstellung von Felgen ist aus der DE-A-198 08 106 bekannt. Zur Zuführung und Abführung der Werkstücke wird ein gemeinsamer Roboter eingesetzt, welcher zwei Drückwalzeinheiten bedienen kann.Such a device for the production of rims is from known from DE-A-198 08 106. For feeding and discharging a common robot is used for the workpieces, which can operate two spinning roller units.

Zur Verbesserung der Fahreigenschaften, insbesondere des Schwingungs- und Geräuschverhaltens, von Fahrzeugen wird im Kraftfahrzeugbau eine Reduktion der Masse ungefederter Fahrzeugteile angestrebt. Die Verminderung der Masse insbesondere der Fahrzeugräder spielt hierbei eine wichtige Rolle.To improve the driving characteristics, especially the Vibration and noise behavior, of vehicles in motor vehicle construction a reduction in the unsprung mass Targeted vehicle parts. The reduction in mass in particular the vehicle wheels play an important role here Role.

Fahrzeugräder werden derzeit hauptsächlich aus Stahl oder einem Leichtmetall, insbesondere einer Aluminiumlegierung hergestellt.Vehicle wheels are currently mainly made of steel or a light metal, especially an aluminum alloy manufactured.

Im Vergleich zu Fahrzeugrädern aus Stahl haben Fahrzeugräder aus Leichtmetall den Vorteil, daß das geringere spezifische Gewicht des Leichtmetalls zu Fahrzeugrädern mit einer relativ geringen Masse zu führen. Compared to steel vehicle wheels, vehicle wheels have made of light metal the advantage that the lower specific weight of the light metal to vehicle wheels with a relatively small mass.

Aus diesem Grund werden immer häufiger Fahrzeugräder aus Leichtmetall eingesetzt. Jedoch hat Stahl im Hinblick auf den gesamten Produktionsprozeß von der Erzeugung des Werkstoffes bis zu seiner Wiederverwertung deutliche Vorteile gegenüber Aluminiumlegierungen. Ein Einsatz von Fahrzeugrädern aus Stahl ist daher aus fertigungstechnischer, wirtschaftlicher und ökologischer Sicht wünschenswert.Because of this, vehicle wheels are becoming increasingly common Light metal used. However, steel has with regard to the entire production process from the production of the material clear advantages until its recycling compared to aluminum alloys. Use of vehicle wheels made of steel is therefore from a manufacturing, economically and ecologically desirable.

Besonders wirtschaftlich ist dabei die Herstellung der Felge aus einem Rohrelement, wie es etwa in der US-A-5 579 578, der WO-A-96/25 257 oder der EP-A-0-780 244 beschrieben ist.The manufacture of the rim is particularly economical from a tubular element such as that described in US-A-5 579 578, WO-A-96/25 257 or EP-A-0-780 244 is.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren unter Verwendung der Vorrichtung anzugeben, mit welchen eine besonders wirtschaftliche Herstellung von Fahrzeugrädern bei einem einfachen Vorrichtungsaufbau möglich ist.The invention has for its object to provide a device and a method using the device with which a particularly economical production of vehicle wheels is possible with a simple device structure.

Die Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 bzw. durch ein Verfahren unter Verwendung dieser Vorrichtung mit den Merkmalen des Anspruchs 11 gelöst. The task is accomplished by a device with the features of claim 1 or by using a method solved this device with the features of claim 11.

Es ist Vorgesehen, daß zumindest zwei Drückwalzeinheiten vorgesehen sind, die in einer Bearbeitungsstation zusammengefaßt sind, daß eine gemeinsame Zuführeinrichtung vorgesehen ist, durch welche Werkstücke zu den zumindest zwei Drückwalzeinheiten zuführbar sind, und daß eine gemeinsame Abführeinrichtung vorgesehen ist, durch welche Werkstücke von den zumindest zwei Drückwalzeinheiten abführbar sind.It is intended that at least two spinning roll units are provided, which are combined in a processing station that a common feed device is provided by which workpieces for the at least two spinning roll units are fed, and that a common discharge device is provided by which workpieces from the at least two spinning roller units can be removed.

Die Vorrichtung zum Drückwalzen hat den Vorteil, daß gleichzeitig mindestens zwei Werkstücke nebeneinander bearbeitet werden können, wodurch eine besonders effektive und damit kostengünstige Herstellung, insbesondere von Felgen nach dem erfindungsgemäßen Verfahren, möglich ist.The device for the pressure rolling has the Advantage that at least two workpieces side by side at the same time can be edited, making a special effective and therefore inexpensive manufacture, in particular of rims according to the inventive method, possible is.

Hierbei ist bevorzugt, daß die Drückwalzeinheiten in der Bearbeitungsstation mit ihren Hauptspindeln parallel nebeneinander angeordnet sind. Hierdurch lassen sich die WerkStücke besonders einfach zu den Drückwalzeinheiten zu- bzw. von den Drückwalzeinheiten abführen.It is preferred that the pressure roller units in the Machining station with their main spindles parallel to each other are arranged. This allows the work pieces particularly easy to feed or press roll units lead away from the spinning roller units.

Es ist besonders vorteilhaft, wenn die Hauptspindeln der Drückwalzeinheiten in einem einheitlichen Abstand zueinander angeordnet sind. Das Zu- und Abführen der Werkstücke wird auf diese Weise besonders einfach gestaltet. It is particularly advantageous if the main spindles Spinning roll units at a uniform distance from each other are arranged. The feeding and removal of the workpieces is designed to be particularly simple in this way.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist vorgesehen, daß die Zuführeinrichtung für jede Drückwalzeinheit jeweils ein Zuführorgan umfaßt. Hierdurch läßt sich erreichen, daß die Werkstücke parallel zugeführt und von den Drückwalzeinheiten aufgenommen werden können und parallel von den Drückwalzeinheiten abgegeben und abgeführt werden können. Hierdurch wird eine besonders effiziente Herstellung von Felgen erreicht.In a further preferred embodiment of the invention Device is provided that the feed device for each press roll unit each comprises a feed member. This allows the workpieces to be parallel fed and taken up by the spinning roll units can and delivered in parallel by the pressure roller units and can be dissipated. This makes one special efficient production of rims achieved.

In einer weiteren Ausgestaltung der Erfindung ist von Vorteil, daß die Zuführ organe bewegbar und in einem festen Abstand zueinander angeordnet sind. Hierbei ist es insbesondere vorteilhaft, wenn der einheitliche Abstand der Hauptspindeln der Drückwalzeinheiten zueinander und der feste Abstand der Zuführ organe zueinander gleich sind. Auf diese Weise können in regelmäßigen Abständen zugeführte Werkstücke von den Zuführorganen aufgenommen und direkt den Hauptspindeln der Drückwalzeinheiten zugeführt werden. Dieser Vorteil gilt für die entsprechenden Abführorgane in analoger Weise. Insgesamt läßt sich dadurch eine noch bessere Steigerung der Effizienz bei der Herstellung der Felgen erreichen.In a further embodiment of the invention, it is advantageous that the feed organs are movable and are arranged at a fixed distance from each other. in this connection it is particularly advantageous if the uniform distance of the main spindles of the pressure roller units to each other and the fixed distance of the feed organs are equal to each other. This way you can in regular Workpieces fed at intervals from the feed elements added and directly to the main spindles of the pressure rolling units are fed. This advantage applies to the corresponding ones Laxative organs in an analogous manner. Overall lets an even better increase in efficiency in the manufacture of the rims.

Eine weitere bevorzugte Ausführungsform der Erfindung besteht darin, daß die Zuführeinrichtung für jede Drückwalzeinheit einen Transportkanal zum Zuleiten der Werkstücke aufweist. Hierdurch läßt sich eine besonders kostengünstige Möglichkeit zum Zu- bzw. Abführen der Werkstücke realisieren.Another preferred embodiment of the invention exists in that the feeder a transport channel for each press roll unit Feeding the workpieces. This leaves a particularly cost-effective way to add or remove Realize removal of the workpieces.

Weiterhin ist bevorzugt, daß eine zentrale Steuereinheit vorgesehen ist, durch welche das Bearbeiten und/oder Zuführen und/oder Abführen der Werkstücke steuerbar ist. Auf diese Weise lassen sich einzelne Prozeßschritte des Zu- bzw. Abführens sowie des Bearbeitens der Werkstücke abhängig voneinander steuern und dadurch besonders sicher kontrollieren.It is further preferred that a central control unit is provided, through which the processing and / or feeding and / or removal of the workpieces is controllable. On In this way, individual process steps of the or removal and processing of the workpieces control each other and thereby control particularly safely.

Hierbei ist es besonders vorteilhaft, wenn durch die zentrale Steuereinheit die Drückwalzeinheiten, die Zuführorgane und die Abführorgane einzeln ansteuerbar, insbesondere zu- und abschaltbar sind. Hierdurch wird eine besonders flexible Steuerung des Werkstückdurchsatzes und eine Kapazitätsanpassung ermöglicht.It is particularly advantageous here if the central Control unit, the spinning roll units, the feed elements and the laxatives individually controllable, in particular can be switched on and off. This makes one special flexible control of workpiece throughput and capacity adjustment allows.

Schließlich ist es bevorzugt, daß die Drückwalzeinheiten, die Zuführorgane und/oder Abführorgane als einheitliche Module ausgebildet sind. Einerseits ist dadurch auf einfache Weise eine Anpassung einer Maschine an Kundenwünsche möglich, indem eine entsprechende Anzahl von Modulen zusammengestellt wird. Andererseits kann ein ausgefallenes oder zu wartendes Modul einfach und schnell durch ein Ersatzmodul ausgewechselt werden, so daß ein längerer Produktionsausfall vermieden werden kann. Schließlich bringt die modulare Bauweise auch Kostenvorteile in der Herstellung der Maschine. Finally, it is preferred that the pressure rolling units, the feeders and / or laxatives as uniform Modules are formed. On the one hand, this makes it easy Way an adaptation of a machine to customer requirements possible by putting together an appropriate number of modules becomes. On the other hand, a failed or the module to be serviced easily and quickly with a replacement module be replaced so that a longer production loss can be avoided. Finally brings the modular Construction also has cost advantages in the manufacture of the Machine.

In einer bevorzugten Ausgestaltung des Verfahrens ist vorgesehen, daß die Verringerung der Wandstärke des Werkstückes durch Gegenlauf-Drückwalzen eingeformt wird. Bei diesem speziellen Drückwalzverfahren fließt das Material des Werkstückes entgegen der axialen Zustellrichtung und wird axial gelängt. Gegenüber anderen Verfahren, insbesondere dem Gleichlauf-Drückwalzen, hat das Gegenlauf-Drückwalzen den Vorteil, daß eine besonders hohe Kaltverfestigung erzielbar ist, so daß eine sehr große Festigkeit des Werkstoffs erreicht wird. Dies erlaubt die Einstellung besonders dünner Wandstärken der Felge, was die Masse des Fahrzeugrades weiter reduziert. Weiter ist vorteilhaft, daß das Rohrstück einfach am Walzdorn befestigbar ist. So ist beispielsweise beim Gleichlauf-Drückwalzen ein am Rohrstück ausgebildeter Napf erforderlich, dessen Boden mittels Reitstockkraft und Andrückscheibe auf das freie Walzdornende gepreßt wird.In a preferred embodiment of the The method provides that the reduction in wall thickness of the workpiece is formed by counter-rotating press rolls becomes. With this special pressure rolling process flows the material of the workpiece against the axial feed direction and is axially elongated. Compared to other processes in particular the synchronous spinning roll, that has Counter-rotating press rolls have the advantage that they are particularly high Strain hardening can be achieved, so that a very large Strength of the material is achieved. This allows the Setting particularly thin wall thicknesses of the rim, which the Vehicle wheel mass further reduced. It is also advantageous that the pipe section can be easily attached to the rolling mandrel is. For example, in the case of synchronous spinning rolling is a Well formed on the pipe section required, the bottom by means of tailstock force and pressure disc on the free Roll mandrel end is pressed.

Darüber hinaus hat das Gegenlauf-Drückwalzen den Vorteil, daß die Werkstücklängung nicht vom Supportlangshub und der Walzdomlänge begrenzt ist. Dadurch kann ein Umbau der Drückwalzmaschine, z.B. Austausch des Walzdorns zur Herstellung von Felgen unterschiedlicher Breite, entfallen, sofern die Felgenbreiten innerhalb bestimmter Grenzen variieren.In addition, the counter-rotating pressure rolling has the advantage that the workpiece elongation is not from the long support stroke and the roll dome length is limited. This can be a conversion of the Press rolling machine, e.g. Exchange of the mandrel for production of rims of different widths, if the rim widths vary within certain limits.

Eine weitere bevorzugte Ausgestaltung des Verfahrens sieht vor, daß zumindest in einem axialen Mittenbereich des Werkstückes eine Wandstärke eingestellt wird, die größer ist als die angrenzender Bereiche. Auf diese Weise wird in den an den Mittenbereich angrenzenden Bereichen die Wandstärke des Materials soweit reduziert, daß bei einer bestimmten erforderlichen Belastbarkeit der Felge eine möglichst geringe Felgenmasse erreicht wird. Dagegen steht in dem Mittenbereich ausreichend Material zur Verfügung, so daß ein sicheres Anschweißen einer Radschüssel möglich ist.Another preferred embodiment of the The method provides that at least in an axial central region of the workpiece set a wall thickness that is larger than the adjacent areas. On in this way it is in the area adjacent to the central area Areas the wall thickness of the material is reduced so far that with a certain required resilience of the Rim the smallest possible rim mass is achieved. In contrast, there is sufficient material in the middle area Available so that a secure welding of a wheel bowl is possible.

Hierbei ist es besonders vorteilhaft, wenn der axiale Mittenbereich beim Einformen des Felgenprofiles radial am tiefsten eingezogen wird und dabei ein Felgenbett mit grosser Wandstärke gebildet wird. Beim Einziehen ergibt sich im Mittenbereich eine Vergrößerung der Wandstärke des Felgenbettes, so daß sich Radschüsseln oder Badscheiben in besonders zuverlässiger Weise an das Felgenbett anschweißen lassen. Einer Überhitzung und damit einer Zerstörung der Werkstoffmatrix während des Anschweißens wird somit besonders gut entgegengewirkt.It is particularly advantageous here if the axial central region when molding the rim profile radially on deepest is pulled in and thereby a rim well with large Wall thickness is formed. When moving in in the middle area an increase in the wall thickness of the rim well, so that wheel dishes or bath disks in particular weld reliably to the rim well to let. An overheating and thus a destruction of the This makes the material matrix special during welding well counteracted.

Darüber hinaus ist das eine große Wandstärke aufweisende Felgenbett zur Aufnahme besonders hoher Belastungskräfte geeignet, die an dieser Stelle zwischen Felgenbett und Radschüssel übertragen werden.In addition, it has a large wall thickness Rim bed for absorbing particularly high loads suitable at this point between the rim well and the wheel hub be transmitted.

Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, daß in jeweils einem Bereich der beiden freien Enden des Werkstückes eine Wandstärke eingestellt wird, die größer ist als die angrenzender Werkstückbereiche. Hierbei kann vorgesehen sein, daß der Bereich der beiden freien Enden jeweils zu einem Felgenhorn geformt wird. Auf diese Weise lassen sich Felgenhörner mit der erforderlichen hohen mechanischen Belastbarkeit erzeugen, wobei gleichzeitig in den an die Felgenhörner angrenzenden Bereichen eine geringere Wandstärke möglich ist.A further preferred embodiment of the invention provides before that in each area of the two free ends of the workpiece a wall thickness is set that is larger than the adjacent workpiece areas. in this connection can be provided that the area of the two free Ends are each formed into a rim flange. To this Way can rim horns with the required high generate mechanical resilience, while at the same time the areas adjacent to the rim flanges less Wall thickness is possible.

Eine bevorzugte Ausführungsform des Verfahrens sieht vor, daß in den Bereichen, welche zu den Felgenschultern geformt werden, die Wandstärke des Werkstückes definiert verringert und die Festigkeit des Stahlwerkstoffes gezielt erhöht wird. Auf diese Weise wird zur Gewichtsreduktion der Felge die Wandstärke verringert, wobei durch das Einformen der Felgenschultern die Festigkeit des Stahlwerkstoffes aufgrund der eintretenden Kaltverfestigung erhöht wird. Hierdurch läßt sich also bei hoher Belastbarkeit der Felge deren Masse signifikant reduzieren. A preferred embodiment of the method stipulates that in the areas leading to the rim shoulders are shaped, the wall thickness of the workpiece defined reduced and the strength of the steel material is specifically increased. This will help you lose weight the rim reduces the wall thickness, whereby by the molding of the rim shoulders the strength of the steel material due to the onset of work hardening is increased. This makes it possible to withstand high loads of the rim significantly reduce its mass.

Eine weitere Ausgestaltung des Verfahrens sieht vor, daß in wenigstens einem Bereich, welcher zu einer Felgenschulter geformt wird, ein Teilbereich zu einem Felgenhump geformt wird. Je nach Anforderung an die mechanische Belastbarkeit kann auch hier die Wandstärke des Werkstückes im Teilbereich des zu formenden Felgenhumpes entsprechend gewählt werden. Another embodiment of the process provides that in at least one area, which leads to a Rim shoulder is molded, a portion to one Rim hump is molded. Depending on the mechanical requirements The wall thickness of the Workpiece in the partial area of the rim hump to be formed be chosen accordingly.

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert; es zeigen in einer stark schematisierten Darstellung

Fig. 1
einen Querschnitt durch die Wand des Rohr-elementes;
Fig. 2
einen Querschnitt durch das in Fig. 1 dargestellte Werkstück nach dem definierten Verringern der Wandstärke und axialen Längen des Werkstückes;
Fig. 3
einen Querschnitt durch das in Fig. 2 dargestellte Werkstück nach dem Einformen des Felgenprofiles;
Fig. 4
eine Ansicht der erfindungsgemäßen Vorrichtung mit einer Darstellung der Zuführ- und Abführeinheiten;
Fig. 5
eine Ansicht der erfindungsgemäßen Vorrichtung mit einer Darstellung der Drückwalzelemente.
The invention is explained in more detail below with reference to drawings; it show in a highly schematic representation
Fig. 1
a cross section through the wall of the tube element;
Fig. 2
a cross section through the workpiece shown in Figure 1 after the defined reduction in wall thickness and axial lengths of the workpiece.
Fig. 3
a cross section through the workpiece shown in Figure 2 after the molding of the rim profile.
Fig. 4
a view of the device according to the invention with a representation of the feed and discharge units;
Fig. 5
a view of the device according to the invention with a representation of the pressure rolling elements.

In den Figuren 1 bis 3 sind Querschnitte des Werkstückes entlang von Querschnittsebenen dargestellt. Die Querschnittsebenen verlaufen hierbei parallel zur Rotationsachse des Werkstückes und schließen diese mit ein. Aufgrund der Rotationssymmetrie des jeweils dargestellten Werkstückes um dessen Rotationsachse ist bei den in den Figuren 1 bis 3 gezeigten Querschnitten lediglich eine Seite des Querschnittes durch das. Werkstück entlang der Querschnittsebene dargestellt.In Figures 1 to 3 are cross sections of the workpiece shown along cross-sectional planes. The cross-sectional planes run parallel to the axis of rotation of the workpiece and include it. by virtue of the rotational symmetry of the represented Workpiece around its axis of rotation is in the in the Figures 1 to 3 shown cross sections only one Side of the cross section through the workpiece along the Cross-sectional level shown.

Figur 1 zeigt einen Querschnitt durch die Wand des Rohrelementes, welches eine einheitliche Wandstärke aufweist und das Werkstück 10 bildet.FIG. 1 shows a cross section through the wall of the tubular element, which has a uniform wall thickness and forms the workpiece 10.

In Figur 2 ist ein Querschnitt durch das in Figur 1 dargestellte Werkstück 10 nach dem definierten Verringern der Wandstärke und axialen Längen dargestellt. In dem gezeigten Beispiel wurde in einem axialen Mittenbereich 11 des Werkstückes 10 die Ausgangswandstärke belassen, während die angrenzenden Bereiche, welche die Felgenschultern bilden sollen, durch Drückwalzen in ihrer Wandstärke reduziert wurden. Außerdem wurde im Bereich der freien Enden 14 des Werkstückes 10 für die Felgenhörner ebenfalls die Ausgangswandstärke belassen. Bei dem bereichsweise durchgeführten Drückwalzen wurde neben der Wandstärke auch gezielt die Festigkeit und axiale Länge der Zwischenform eingestellt.In Figure 2 is a cross section through that shown in Figure 1 Workpiece 10 after the defined reduction of the Wall thickness and axial lengths shown. In the shown Example was in an axial central region 11 of the Workpiece 10 leave the initial wall thickness while the adjacent areas that form the rim shoulders should be reduced in wall thickness by spinning rollers were. In addition, 14 of the free ends Workpiece 10 for the rim flanges also the initial wall thickness leave. In the area carried out In addition to the wall thickness, pressure rolling was also specifically Strength and axial length of the intermediate form set.

Figur 3 zeigt einen Querschnitt durch das in Figur 2 dargestellte Werkstück nach dem Einformen eines Felgenprofiles.Figure 3 shows a cross section through that shown in Figure 2 Workpiece after forming a rim profile.

In diesem Beispiel wurde der axiale Mittenbereich 11 durch das Einformen des Felgenprofiles radial am tiefsten eingezogen, wobei ein Felgenbett 16 mit großer Wandstärke gebildet wurde.In this example, the axial center area 11 was cut through the rim profile is drawn radially deepest, wherein a rim well 16 is formed with a large wall thickness has been.

Darüber hinaus zeigt das Beispiel in Figur 3 zwei jeweils an den beiden freien Enden 14 geformte Felgenhörner 17. Die beiden Felgenschultern 19 wurden jeweils aus den kaltverfestigten Bereichen mit verringerter Wandstärke geformt und weisen zusätzlich jeweils einen eingeformten Hump 20 auf.In addition, the example in Figure 3 shows two each 14 shaped rim flanges 17 at the two free ends two rim shoulders 19 were each from the work hardened Formed areas with reduced wall thickness and each additionally have a molded hump 20.

Figur 4 zeigt eine teilweise geschnittene Ansicht einer erfindungsgemäßen Vorrichtung mit drei Drückwalzeinheiten 25, einer gemeinsamen Zuführeinrichtung 30 und einer gemeinsamen Abführeinrichtung 31. Die Zuführeinrichtung 30 weist in diesem Beispiel für jede Drückwalzeinheit 25 jeweils ein Zuführorgan 32 auf, wodurch die Werkstücke 10 den einzelnen Drückwalzeinheiten 25 zugeführt werden können.Figure 4 shows a partially sectioned view of an inventive Device with three spinning roller units 25, a common feeder 30 and a common one Discharge device 31. The feed device 30 points in this example for each spinning roll unit 25 Feed member 32, whereby the workpieces 10 each Press roll units 25 can be supplied.

Die Zuführorgane 32 bestehen jeweils aus einem Schlitten 37, welcher an einem an Stützsäulen 33 befestigten Querträger 34 verschiebbar gelagert ist. An dem Schlitten 37 ist ein Greifarm 38 vertikal verstellbar angebracht. An jeweils einem freien Ende der Greifarme 38 ist zur Aufnahme von Werkstücken 10 eine Klemmgreifeinrichtung 39 angebracht. Die Schlitten 37 haben jeweils gleichen Abstand zueinander und sind starr miteinander verbunden. The feed members 32 each consist of a carriage 37, which on a cross member fastened to support columns 33 34 is slidably mounted. On the carriage 37 is a gripper arm 38 is vertically adjustable. At each a free end of the gripper arms 38 is for receiving Workpieces 10 have a clamping gripping device 39 attached. The carriages 37 are equally spaced from one another and are rigidly connected.

Des weiteren ist in Figur 4 eine Zuführstation 36 dargestellt, an welcher die zuzuführenden Werkstücke 10 für die Aufnahme durch die Zuführorgane bereitgestellt werden. Die Zuführstation 36 kann beispielsweise als Förderband mit entsprechenden Befestigungselementen 40 zum Aufnehmen der Werkstücke 10 bei deren Bereitstellung ausgebildet sein. Prinzipiell ist aber auch ein Einsatz einer mobilen Aufnahme- und Transporteinheit, wie z.B. eine entsprechend gestaltete Palette mit Befestigungselementen 40; möglich. Der Abstand der auf der Zuführstation 36 herangeführten Werkstücke 10 ist hierbei vorzugsweise gleich dem Abstand der Klemmgreifeinrichtungen 39 zueinander.Furthermore, a feed station 36 is shown in FIG. 4, on which the workpieces 10 to be fed for the Recording are provided by the feed organs. The Feed station 36 can be used, for example, as a conveyor belt corresponding fasteners 40 for receiving the Workpieces 10 be formed when they are provided. In principle, however, the use of a mobile recording and transport unit, e.g. one accordingly designed pallet with fasteners 40; possible. The distance of those brought up to the feed station 36 Workpieces 10 are preferably equal to the distance of the clamping gripping devices 39 to one another.

Die Abführeinrichtung 31 weist für jede Drückwalzeinheit jeweils einen Transportkanal 35 zum Abführen bearbeiteter Werkstücke 10 von der jeweiligen Drückwalzeinheit 25 auf. Die Transportkanäle 35 können hierbei entweder einen kreisrunden oder rechteckigen Querschnitt aufweisen.The discharge device 31 points for each spinning roll unit each a transport channel 35 for discharging processed Workpieces 10 from the respective pressure roller unit 25. The transport channels 35 can either be circular or have a rectangular cross-section.

In dem dargestellten Ausführungsbeispiel haben sowohl die Drückwalzeinheiten 25 als auch die Klemmgreifeinrichtungen 39, die Zuführorgane 32, sowie die Transportkanäle 35 jeweils einen einheitlichen Abstand zueinander.In the illustrated embodiment, both Press roll units 25 as well as the clamping gripping devices 39, the feed members 32, and the transport channels 35 each a uniform distance from each other.

Figur 5 zeigt eine Schnittansicht der erfindungsgemäßen Vorrichtung mit Einzelheiten zum Aufbau der Drückwalzeinheiten 25, wobei Elemente der Zuführ- 30 und Abführeinrichtung 31 nicht dargestellt sind. In diesem Ausführungsbeispiel werden die einzelnen Werkstücke 10 durch vertikales Zustellen von jeweils zwei Drückwalzrollen 26 bearbeitet. Je nach Verfahrensschritt wird hierbei die Wandstärke des Werkstückes 10 in bestimmten Teilbereichen verringert und das Werkstück 10 axial gelängt oder durch Zustellen einer entsprechenden Profilrolle das Werkstück 10 radial eingezogen und ein Felgenprofil geformt.Figure 5 shows a sectional view of the invention Device with details of the structure of the pressure roller units 25, elements of the feed and 30 discharge device 31 are not shown. In this embodiment are the individual workpieces 10 by vertical Feeding of two spinning roller 26 each processed. Depending on the process step, the wall thickness of the Workpiece 10 reduced in certain areas and the workpiece 10 is axially elongated or by delivering one corresponding workpiece roll, the workpiece 10 is drawn radially and shaped a rim profile.

Claims (19)

  1. Device for the flow-forming of tubular elements for the manufacture of rims, wherein
    at least two flow-forming units (25) are provided, which are combined in a machining station (27),
    a common supply device (30) is provided, through which workpieces (10) can be-supplied to the at least two flow-forming units (25) and
    a common removal device (31) is provided, through which workpieces (10) can be removed from the at least two flow-forming units (25),
    characterized in that
    for each of the flow-forming units (25) a separate transfer channel (35) is provided for carrying away the workpieces (10),
    the transfer channel (39) is in each case located below the main spindle of the flow-forming unit (25) and
    the transfer channels (35) issue into a common channel of the removal device (31).
  2. Device according to claim 1, characterized in that the flow-forming units (25) in the machining station (27) have their main spindles in parallel, juxtaposed form.
  3. Device according to one of the claims 1 and 2, characterized in that there are more than two flow-forming units (25) and that the main spindles of the flow-forming units (25) are positioned with a uniform mutual spacing.
  4. Device according to one of the claims 1 to 3, characterized in that the supply device (30) for each flow-forming unit (25) in each case comprises a supply member.
  5. Device according to claim 4, characterized in that the supply members are movable and have a fixed mutual spacing.
  6. Device according to claims 3 and 5, characterized in that the uniform mutual spacing of the main spindles of the flow-forming units (25) and the fixed mutual spacings of the supply members are identical.
  7. Device according to one of the claims 1 to 6, characterized in that the supply device (30) for each flow-forming unit has a transfer channel for feeding in the workpieces.
  8. Device according to one of the claims 1 to 7, characterized in that a. central control unit is provided, through which the machining and/or supply and/or removal of the workpieces (10) can be controlled.
  9. Device according to claim 8, characterized in that through the central control unit the flow-forming units (25), supply members and removal members are individually controllable and in particular can be switched on and off.
  10. Device according to one of the claims 1 to 9, characterized in that the flow-forming units (25), supply members and/or removal members are in each case constructed as standardized modules.
  11. Method for the manufacture of vehicle wheels with a rim made from a steel material using a device according to one of the claims 1 to 10, characterized in that
    the workpiece (10) is constituted by a tubular member which has a uniform wall thickness and is fixed in a flow-forming unit (25),
    prior to the shaping of a rim profile, the workpiece (10) is fixed on a cylindrical rolling mandrel, whose diameter corresponds to the internal diameter of the tubular element,
    by the radial and axial infeeding of at least one flow-forming roll (26), the wall thickness of the workpiece (10) is reduced in a defined manner in specific partial areas and the workpiece (10) is axially lengthened, areas of different wall thicknesses being produced and
    then the rim profile of the rim is shaped by the radial infeeding of a profile roll.
  12. Method according to claim 11, characterized in that the reduction of the wall thickness of the workpiece (10) is brought about by conventional flow-forming.
  13. Method according to claim 11 or 12, characterized in that at least in one axial central area (11) of the workpiece (10) a wall thickness is set which is larger than that of the adjacent areas.
  14. Method according to claim 13, characterized in that, during the shaping of the rim profile, the axial central area (10) is radially reduced to the lowest extent and a rim bed (16) with a large wall thickness is formed.
  15. Method according to claim 14, characterized in that following radial reduction, a wheel disk is welded to the rim bed (16).
  16. Method according to one of the claims 11 to 15, characterized in that in each case in one area of the two free ends (14) of the workpiece (10) a wall thickness is set which is larger than that of the adjacent workpiece areas.
  17. Method according to claim 16, characterized in that the area of the two free ends is in each case shaped to form a rim flange (17).
  18. Method according to one of the claims 11 to 17, characterized in that in the areas which are shaped to rim shoulders (19), the wall thickness of the workpiece (10) is reduced in defined manner and the strength of the steel material is increased in planned manner.
  19. Method according to claim 18, characterized in that in at least one area which is shaped to a rim shoulder (19), a partial area is shaped to form a rim hump (20).
EP00938668A 1999-05-26 2000-05-22 Method and device for flow turning Expired - Lifetime EP1181119B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19924062 1999-05-26
DE19924062A DE19924062A1 (en) 1999-05-26 1999-05-26 Production system for vehicle wheels with steel rims
PCT/EP2000/004636 WO2000072994A2 (en) 1999-05-26 2000-05-22 Method and device for flow turning

Publications (2)

Publication Number Publication Date
EP1181119A2 EP1181119A2 (en) 2002-02-27
EP1181119B1 true EP1181119B1 (en) 2003-11-12

Family

ID=7909205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00938668A Expired - Lifetime EP1181119B1 (en) 1999-05-26 2000-05-22 Method and device for flow turning

Country Status (3)

Country Link
EP (1) EP1181119B1 (en)
DE (2) DE19924062A1 (en)
WO (1) WO2000072994A2 (en)

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US7774938B2 (en) 2002-10-17 2010-08-17 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Method of production a tire rim having different wall thicknesses

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FR2816532B1 (en) 2000-11-13 2003-01-24 Michelin Soc Tech METHOD FOR MANUFACTURING A VEHICLE WHEEL RIM
DE102006048528A1 (en) * 2006-10-13 2008-04-17 Volkswagen Ag Steel wheel and method for its production
DE102010030174A1 (en) * 2010-06-16 2011-12-22 Behr Industry Motorcycle Components Gmbh Method for producing a closed profiled ring, in particular a rim ring for a two-wheeled vehicle
DE202016009191U1 (en) 2016-09-16 2023-08-25 Maxion Wheels Holding Gmbh Steep shoulder rim and vehicle wheel for commercial vehicles
DE102016117510A1 (en) * 2016-09-16 2018-03-22 Maxion Wheels Germany Holding Gmbh Method for the production of steep shoulder rims, steep shoulder rim and vehicle wheel herewith for commercial vehicles

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DE2651458A1 (en) * 1976-11-11 1978-05-18 Bohner & Koehle One part wheel rims for heavy vehicle - has ring rolled and pressed to have section which will be equally stressed under load
DE3344797A1 (en) * 1983-12-10 1985-06-20 Th. Kieserling & Albrecht Gmbh & Co, 5650 Solingen TRANSPORT DEVICE FOR WHEEL RIMS
DE3801628A1 (en) * 1988-01-21 1989-07-27 Kieserling & Albrecht RIM PROFILING SYSTEM
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DE19808106C2 (en) * 1997-05-26 2002-02-14 Leico Werkzeugmaschb Gmbh & Co Method and device for producing a one-piece vehicle wheel

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US7774938B2 (en) 2002-10-17 2010-08-17 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Method of production a tire rim having different wall thicknesses

Also Published As

Publication number Publication date
DE19924062A1 (en) 1999-12-09
WO2000072994A3 (en) 2001-08-30
EP1181119A2 (en) 2002-02-27
WO2000072994A2 (en) 2000-12-07
DE50004428D1 (en) 2003-12-18

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