EP2167257B1 - Ring press - Google Patents
Ring press Download PDFInfo
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- EP2167257B1 EP2167257B1 EP08773813A EP08773813A EP2167257B1 EP 2167257 B1 EP2167257 B1 EP 2167257B1 EP 08773813 A EP08773813 A EP 08773813A EP 08773813 A EP08773813 A EP 08773813A EP 2167257 B1 EP2167257 B1 EP 2167257B1
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- EP
- European Patent Office
- Prior art keywords
- pressing
- elements
- ring press
- ring
- rollers
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/02—Special design or construction
- B21J7/14—Forging machines working with several hammers
- B21J7/145—Forging machines working with several hammers the hammers being driven by a rotating annular driving member
Definitions
- the present invention relates to a ring press according to the preamble of claim 1.
- Ring presses are used for the production of dimensionally accurate sleeves, such as plain bearings, small motor housings, chain sleeves, chain rollers and the like. These sleeves are bent from strip material in a first step using a bending tool. This is usually a bending machine used. However, the roundness of the sleeve produced by bending does not yet have the desired accuracy within the tolerances of the finished product.
- Ring presses according to the preamble of claim 1 are known and have, for example, four pairs each orthogonal to each other arranged pressing elements. At their radially outer ends, these pressing elements comprise roller-type or ball-type force transmission elements which are acted upon by pressure generating elements rotatable in the circumferential direction relative to the pressing elements when the pressing elements are in their pressing position.
- the movement of the pressing elements in the radial direction is, for example, by a on the respective role of a pressing element passing past, inclined pressure piece whose inclination is designed such that upon further rotation in the circumferential direction a greater pressure is exerted on the pressing element.
- ring presses are known in which the pressure generating arrangement acts on the pressing elements via a hinge connection, in particular a kind of double ball joint between pressure generating arrangement and pressing element.
- the pressure generating arrangement and the pressing elements are connected to one another such that, depending on the rotational position of the pressure generating arrangement relative to the pressing elements, the pressing element is pressed into its pressing position or pulled into its release position.
- This type of ring press requires reciprocation of the pressure generating assembly to move the pressing members between the release position and the press position.
- annular press having a plurality of rollers that are unrolled to generate pressure over a continuous circumferential path formed by the respective radially outer edges of the press members.
- a continuous circumferential path formed by the radially outer edges of the pressing elements allows continuous rolling movement of the rollers in one direction of rotation.
- a reciprocating movement of the pressure generating arrangement relative to the pressing elements is thus not required.
- pressure is transmitted from at least one of the rollers to a corresponding associated pressing element.
- the object of the invention is to provide a ring press that meets the above tolerance requirements.
- the circumferential path has a profile which is regular in the circumferential direction and has alternating radial elevations and countersinkings, such that all rolling elements are moved synchronously into the pressing position when the rollers roll over an elevation.
- Such a profile of the circumferential path allows for rolling the rollers in one direction of rotation also a repeated, repeated pressure generation on the workpiece.
- the profile can be designed such that it always has the same pressure generating characteristic regardless of the direction of rotation of the pressure generating arrangement.
- the elevations and depressions of the profile are designed to be direction-dependent, for example, such that the transition from a reduction in a survey is relatively weakly inclined to build up the pressure continuously and relatively slowly, and that the transition from the survey in the next reduction is relatively steep, so that the pressure on the workpiece quickly decreases.
- the profile can also be designed exactly the opposite, in order to obtain the highest pressure abruptly and then reduce it at the same rotational speed of the rollers slower.
- the pressure generating arrangement preferably has a race on whose radial inner side the rollers roll off.
- the race, the rollers and the peripheral track thus form a kind of rolling bearing in which the race and the rollers roll relative to the circumferentially fixed pressing elements.
- the rollers are thus guided radially inward and can be rolled out over 360 °.
- This construction also has the advantage that the ring press is very compact.
- the raceway is tapered on its radial outer side in the axial direction and abuts against the inside of a clamping ring of the pressure generating arrangement which is of opposite conical configuration in the axial direction.
- the clamping ring is preferably connected to a drive ring of the pressure generating arrangement, in particular screwed. Further, it is proposed in this context that the clamping ring in the axial direction relative to the race and the drive ring is adjustable to adjust the pressure acting on the workpiece.
- the two conical, superimposed peripheral surfaces of the race and the clamping ring allow by axial movement of the clamping ring on the axially fixed race adjusting the radial direction acting on the pressing elements and thus the workpiece pressure.
- the adjustability can be in a range up to 0, 10 mm in the radial direction.
- slot-like openings are formed in the pressing elements, in which stationary guide elements are received with respect to the pressing elements, which guide the radial movement of the pressing elements to the center of the dome or the ring press.
- rollers do not abut each other during rolling between the race and the continuous peripheral edge, it is proposed that between two circumferentially adjacent rollers each have a spacer is provided which is fixed to the race.
- the pressure generating arrangement, the pressing elements and the guide elements are supported immovably in the axial direction and are in particular on a base plate.
- the guide elements are attached to the base plate, preferably screwed.
- the pressing elements and the guide elements in the axial direction on the base plate is preferably a Cover plate or a flange provided, which is or is screwed to the base plate, said screw particularly preferably passes through the guide elements and they are thus also fixed.
- the gearbox in particular has a pinion attached to a shaft of the electric motor which meshes with teeth formed on the outer circumference of the drive ring of the pressure generating arrangement.
- the electric motor may be mounted, for example, on the other side of the base plate supporting the pressure generating assembly, the pressing elements and the guide elements, the shaft of the electric motor passing through a corresponding bore in the base plate, so that the meshing between the pinion mounted on the shaft and the drive ring is possible.
- the pressing elements are movable by return means from the pressing position to the release position when the rollers are in the subsidence of the profile of the continuous circumferential path ,
- the elevations and depressions in the profile of the continuous circumferential path are preferably arranged such that the elevations and depressions are arranged in the profile of the continuous circumferential path such that in each case a number n elevations are formed completely on the outer radial edge of each pressing element, that a number n 1 depressions are completely formed on each pressing element and that the still required to complete the profile reductions are formed in each case half in the circumferential direction directly adjacent pressing elements.
- the ring press 24 comprises rollers and eight pressing elements, so that in the pressing position in each case three rollers act on a pressing element.
- the number of rollers is equal to the number of protrusions per pressing element multiplied by the number of pressing elements, and that the number of counterbores is equal to the number of rollers or the total number of protrusions.
- the profile begins along the circumferential direction with a half countersink, then join the three surveys with each intervening complete subsidence and the profile is completed after the third survey by another half reduction.
- the respective half-sinks in the transition region between the two pressing elements a complete reduction, so that over the entire circumference of the circumferential path the same number of complete elevations and full subsidence is formed.
- a base plate 10 can be seen on which a pressure generating arrangement 12 is supported in the axial direction of a rotation axis D of the ring press.
- the pressure generating assembly 12 is driven via a pinion 14, which rotates counterclockwise with respect to the viewing direction in this embodiment, wherein the rotational movement of the pinion 14 via an in Fig. 2 shown toothing 15 is transmitted to a drive ring 16 of the pressure generating arrangement.
- the drive ring 16 is thus driven in the clockwise direction and transmits this direction of rotation to the other in the circumferential direction U movable elements of the pressure generating arrangement 12th
- a clamping ring 18 which is secured by means of screws 20 on the drive ring 16 extends.
- the drive ring 16 has, based on the cross-sectional view of Fig. 2 on its right side a radially inwardly extending projection 22 through which the screws 20 are passed.
- This radial Projection 22 forms together with the base plate 10 a receiving space in which a race 24 and rollers 26 are received.
- a plurality of pressing elements 28 which are arranged in the circumferential direction next to each other and in the example at their radial outer end portions 29 and at their radial inner end portions 31 in the circumferential direction touch ( Fig. 4 . 5 ).
- the pressing elements 28 have a regular profile, which comprises alternately radial elevations 32 and countersinks 34, which is shown in the enlarged, perspective illustration of a single pressing element according to FIG Fig. 5 is apparent.
- the pressing elements 28 have an oblong hole-shaped opening 36 through which a guide element 38 passes.
- This guide element 38 has a length in the radial direction which is slightly smaller than the length of the oblong hole 36, so that the pressing elements 28 can move in the radial direction relative to the stationary guide element 38.
- the guide elements 38 rest on the rear side on the base plate 10 and are held by means of a resting on the front of the drive ring 16 cover plate 40 in the axial direction.
- the cover plate 40 and the guide elements 38 are fixed by common screws 42 on the base plate 10, wherein the guide elements are also received in recesses.
- the pressing elements 28 are moved by the rolling of the rollers 26 on the continuous circumferential path 46 in the radial direction R to a mandrel 48, on which a workpiece to be machined, in particular a sleeve 50, is pushed.
- the sleeve 50 is acted upon and pressurized by the radial inner edges 52 of the pressing elements 28 which each form a circular arc segment, so that the sleeve 50 is pressed into its final shape between the pressing elements 28 and the mandrel 50.
- the case generated by the ring press pressures are very high and amount to about 100 tons or more, which is a multiple, about 4- to 6 times, the pressure that can be generated by conventional ring presses.
- the particular metallic sleeve material usually comes in the flow area, so that an optimal and precise shaping is possible.
- the pressing elements 28 are in a release position when the rollers 26 are located in a countersink 34. In this position, a sufficient distance between the mandrel 48 and the radial inner edges 52 of the pressing elements 28 is given, which allows the feeding of a workpiece or the release of an already pressed workpiece 50.
- the pressing elements 28 are pressed into their pressing position in which they press a sleeve 50 concentrically against the mandrel 48.
- the mandrel 48 includes in its center the axis of rotation D of the pressure generating arrangement 12, in particular the circumferentially moving elements drive ring 16, clamping ring 18 and race 24.
- the mandrel 48 in the release position of the pressing elements 28 is also rotatable about the axis D together with the In this way, those areas of the sleeve can be brought into shape, which lie in a first pressing step in the circumferential direction exactly between two adjacent pressing elements 28. It can thus be bridged other pressure points and joints with multiple pressing.
- the supplied lubricant is used in this embodiment as a return means for the pressing elements 28. If this by rolling the Rollers 26 are placed over the elevations 32 in the radial direction to the axis of rotation D out under pressure, lubricant, which is located in a formed between the slot 36 and guide member 38 intermediate space or chamber 60, also pressurized. This hydraulic pressure allows the press members 28 to be returned radially outward when the rollers 26 are in a counterbore 34 of the continuous circumferential path 46.
- FIG. 3 Upper part of the pressure generating arrangement is from the Fig. 3 it can be seen that the clamping ring 18 and the race 24 have conical contact surfaces 62 and 64, respectively. Since the clamping ring 18 by means of the screw 20 with respect to the race 24 and the drive ring 16 in the axial direction is adjustable, can be adjusted by the interaction of the inclined contact surfaces 62, 64, a bias on the rollers and thus the pressing elements. This adjustability makes it possible to make radial adjustments in the range up to about 0.10 mm.
- the clamping ring 18 and the race 24 in principle form a wedge gear in which the rotational movements transmitted by the pinion 14 to the drive ring 16 by means of adhesion to the rollers 26 is transmitted.
- spacers 66 can be seen, which are mounted on the race 24. These spacers 66 hold the rollers 26 equidistant from one another and prevent the rollers 26 from approaching or being removed relative to one another when rolling in the circumferential direction. This ensures that always all rollers 26 are arranged simultaneously on a survey 32 or in a reduction 34 of the circumferential path 46, so that the pressing elements 28 are operated synchronously in the radial direction R.
- the elevations 32 which in the exemplary embodiment have the same gradients from a countersink 34 and down to a countersink 34, could also be designed differently.
- one of the slopes could be steeper be executed when a sudden pressure increase or decrease is desired.
- a rapid or slow pressure increase or decrease may also be controlled via the rotational speed of the pressure generating arrangement by means of a control unit of the ring press or a production machine unit comprising the ring press, not shown and explained here.
- the pressing elements 28 have between the radially outer and radially inner end portions 29, 31 a recess 33 which serves to receive and distribute lubricant. Furthermore, the contact surfaces between the pressing elements 28 are reduced in the circumferential direction by this recess 33.
- the number of times a workpiece 50 is pressurized during processing depends on the circulation rate of the pressure generating assembly. For example, in the embodiment shown, an eighth-turn of the pressure generating arrangement 12 leads to a three-times pressurization of the sleeve 50, since during such eighth rotation, the rollers 26 are unrolled over three elevations 32.
- rollers 26 and as many elevations 32 and counterbores 34 are formed on the circumferential path 30.
- the remaining depressions 34 ' are each formed by two adjacent pressing elements 28, on each of which half a countersink 34' is formed. It is of course possible to change both the number of pressing elements and the number of rollers and the number of elevations and reductions on the circumferential path. It is essential in such an adaptation that the rolling movement of the rollers over the elevations and depressions of the circumferential path enables the synchronous actuation of the pressing elements.
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Description
Die vorliegende Erfindung betrifft eine Ringpresse gemäß dem Oberbegriff von Anspruch 1.The present invention relates to a ring press according to the preamble of claim 1.
Ringpressen werden zur Herstellung von maßgenauen Hülsen verwendet, wie beispielsweise Gleitlager, Kleinmotorengehäuse, Kettenhülsen, Kettenrollen und dergleichen. Diese Hülsen werden aus Bandmaterial in einem ersten Arbeitsschritt mit Hilfe eines Biegewerkzeugs rundgebogen. Hier kommt normalerweise eine Verbiegungsmaschine zum Einsatz. Die durch das Biegen erzeugte Rundheit der Hülse weist allerdings noch nicht die gewünschte Genauigkeit innerhalb der Toleranzen des Fertigproduktes auf.Ring presses are used for the production of dimensionally accurate sleeves, such as plain bearings, small motor housings, chain sleeves, chain rollers and the like. These sleeves are bent from strip material in a first step using a bending tool. This is usually a bending machine used. However, the roundness of the sleeve produced by bending does not yet have the desired accuracy within the tolerances of the finished product.
Es ist daher erforderlich, die vorgebogene Hülse in einem zweiten Schritt in einer Ringpresse unter hohem Druck rundzupressen, so dass die Hülse den gewünschten Toleranzen entspricht.It is therefore necessary to press the pre-bent sleeve in a second step in a ring press under high pressure, so that the sleeve corresponds to the desired tolerances.
Ringpressen gemäß dem Oberbegriff von Anspruch 1 sind bekannt und weisen beispielsweise vier jeweils paarweise orthogonal zueinander angeordnete Presselemente auf. An ihren radial äußeren Enden weisen diese Presselemente rollen- oder kugelartige Kraftübertragungselemente auf, die von in Umfangsrichtung relativ zu den Presselementen drehbaren Druckerzeugungselementen beaufschlagt sind, wenn die Presselemente in ihrer Pressstellung sind. Die Bewegung der Presselemente in radialer Richtung wird dabei beispielsweise durch ein an der jeweiligen Rolle eines Presselements vorbeigehendes, geneigtes Druckstück erreicht, dessen Neigung derart ausgestaltet ist, dass bei weiterer Verdrehung in Umfangsrichtung ein größerer Druck auf das Presselement ausgeübt wird.Ring presses according to the preamble of claim 1 are known and have, for example, four pairs each orthogonal to each other arranged pressing elements. At their radially outer ends, these pressing elements comprise roller-type or ball-type force transmission elements which are acted upon by pressure generating elements rotatable in the circumferential direction relative to the pressing elements when the pressing elements are in their pressing position. The movement of the pressing elements in the radial direction is, for example, by a on the respective role of a pressing element passing past, inclined pressure piece whose inclination is designed such that upon further rotation in the circumferential direction a greater pressure is exerted on the pressing element.
Ferner sind auch gattungsgemäße Ringpressen bekannt, bei denen die Druckerzeugungsanordnung über eine Gelenkverbindung, insbesondere eine Art doppeltes Kugelgelenk zwischen Druckerzeugungsanordnung und Presselement auf die Presselemente wirkt. Dabei sind die Druckerzeugungsanordnung und die Presselemente derart miteinander verbunden, dass je nach Drehstellung der Druckerzeugungsanordnung relativ zu den Presselementen das Presselement in seine Pressstellung gedrückt wird oder in seine Freigabestellung gezogen wird. Diese Art der Ringpresse erfordert eine Hin- und Herbewegung der Druckerzeugungsanordnung, um die Presselemente zwischen Freigabestellung und Pressstellung zu bewegen.Furthermore, generic ring presses are known in which the pressure generating arrangement acts on the pressing elements via a hinge connection, in particular a kind of double ball joint between pressure generating arrangement and pressing element. In this case, the pressure generating arrangement and the pressing elements are connected to one another such that, depending on the rotational position of the pressure generating arrangement relative to the pressing elements, the pressing element is pressed into its pressing position or pulled into its release position. This type of ring press requires reciprocation of the pressure generating assembly to move the pressing members between the release position and the press position.
Aus der
Eine kontinuierliche Umfangsbahn, die von den radialen äußeren Rändern der Presselemente gebildet ist, ermöglicht eine kontinuierliche Abrollbewegung der Rollen in einer Drehrichtung. Eine Hin- und Herbewegung der Druckerzeugungsanordnung relativ zu den Presselementen ist somit nicht erforderlich. Dabei wird von wenigstens einer der Rollen Druck auf ein entsprechendes zugeordnetes Presselement übertragen.A continuous circumferential path formed by the radially outer edges of the pressing elements allows continuous rolling movement of the rollers in one direction of rotation. A reciprocating movement of the pressure generating arrangement relative to the pressing elements is thus not required. In this case, pressure is transmitted from at least one of the rollers to a corresponding associated pressing element.
An die oben genannten Fertigungstoleranzen werden hohe Ansprüche gestellt und es werden Genauigkeiten im Bereich von 1/100-Millimetern gefordert.At the above manufacturing tolerances high demands are made and it accuracies in the range of 1/100-millimeters are required.
Aufgabe der Erfindung ist es, eine Ringpresse bereitzustellen, die den genannten Toleranzanforderungen gerecht wird.The object of the invention is to provide a ring press that meets the above tolerance requirements.
Zur Lösung dieser Aufgabe wird eine Ringpressegemäß Anspruch 1 vorgeschlagen.To solve this problem, a ring press according to claim 1 is proposed.
Besonders bevorzugt ist es, dass die Umfangsbahn ein in Umfangsrichtung regelmäßiges Profil mit sich abwechselnden radialen Erhebungen und Senkungen aufweist, derart, dass beim Abrollen der Rollen über eine Erhebung alle Presselemente synchron in die Pressstellung bewegt werden.It is particularly preferred that the circumferential path has a profile which is regular in the circumferential direction and has alternating radial elevations and countersinkings, such that all rolling elements are moved synchronously into the pressing position when the rollers roll over an elevation.
Ein derartiges Profil der Umfangsbahn ermöglicht beim Abrollen der Rollen in einer Drehrichtung auch eine mehrmalige, wiederholte Druckerzeugung auf das Werkstück. Das Profil kann derart ausgestaltet sein, dass es unabhängig von der Drehrichtung der Druckerzeugungsanordnung eine immer gleiche Druckerzeugungscharakteristik aufweist. Denkbar ist allerdings auch, dass die Erhebungen und Senkungen des Profils laufrichtungsabhängig ausgebildet sind, beispielsweise derart, dass der Übergang von einer Senkung in eine Erhebung relativ schwach geneigt ist, um den Druck kontinuierlich und relativ langsam aufzubauen, und dass der Übergang von der Erhebung in die nächste Senkung relativ steil ausgebildet ist, so dass der Druck auf das Werkstück schnell nachlässt. Je nach den gewünschten Fertigungsbedingungen kann das Profil auch genau umgekehrt ausgebildet sein, um den höchsten Druck schlagartig zu erhalten und ihn anschließend bei gleicher Umlaufgeschwindigkeit der Rollen langsamer zu reduzieren.Such a profile of the circumferential path allows for rolling the rollers in one direction of rotation also a repeated, repeated pressure generation on the workpiece. The profile can be designed such that it always has the same pressure generating characteristic regardless of the direction of rotation of the pressure generating arrangement. However, it is also conceivable that the elevations and depressions of the profile are designed to be direction-dependent, for example, such that the transition from a reduction in a survey is relatively weakly inclined to build up the pressure continuously and relatively slowly, and that the transition from the survey in the next reduction is relatively steep, so that the pressure on the workpiece quickly decreases. Depending on the desired manufacturing conditions, the profile can also be designed exactly the opposite, in order to obtain the highest pressure abruptly and then reduce it at the same rotational speed of the rollers slower.
Damit die Rollen an der Umfangsbahn abgerollt werden können, weist die Druckerzeugungsanordnung bevorzugt einen Laufring auf, an dessen radialer Innenseite sich die Rollen abwälzen. Der Laufring, die Rollen und die Umfangsbahn bilden somit eine Art Wälzlager, bei dem sich der Laufring und die Rollen relativ zu den in Umfangsrichtung feststehenden Presselementen abrollen. Die Rollen sind somit radial innen geführt und können über 360° geführt abgerollt werden. Diese Bauweise hat überdies den Vorteil, dass die Ringpresse sehr kompakt ist.So that the rollers can be unrolled on the circumferential path, the pressure generating arrangement preferably has a race on whose radial inner side the rollers roll off. The race, the rollers and the peripheral track thus form a kind of rolling bearing in which the race and the rollers roll relative to the circumferentially fixed pressing elements. The rollers are thus guided radially inward and can be rolled out over 360 °. This construction also has the advantage that the ring press is very compact.
Um eine einstellbare Vorspannung zu ermöglichen, die vom Laufring auf die Rollen und somit die Presselemente ausgeübt wird, wird vorgeschlagen, dass der Laufring auf seiner radialen Außenseite in Axialrichtung konisch ausgeführt ist und an der Innenseite eines in Axialrichtung gegenläufig konisch ausgebildeten Spannrings der Druckerzeugungsanordnung anliegt. Dabei ist der Spannring vorzugsweise mit einem Antriebsring der Druckerzeugungsanordnung verbunden, insbesondere verschraubt. Ferner wird in diesem Zusammenhang vorgeschlagen, dass der Spannring in Axialrichtung relativ zum Laufring und zum Antriebsring verstellbar ist, um den auf das Werkstück wirkenden Druck einzustellen.In order to enable an adjustable preload, which is exerted by the race on the rollers and thus the pressing elements, it is proposed that the raceway is tapered on its radial outer side in the axial direction and abuts against the inside of a clamping ring of the pressure generating arrangement which is of opposite conical configuration in the axial direction. In this case, the clamping ring is preferably connected to a drive ring of the pressure generating arrangement, in particular screwed. Further, it is proposed in this context that the clamping ring in the axial direction relative to the race and the drive ring is adjustable to adjust the pressure acting on the workpiece.
Die beiden konisch ausgebildeten, aufeinander liegenden Umfangsflächen des Laufrings und des Spannrings ermöglichen durch eine axiale Bewegung des Spannrings auf dem axial feststehenden Laufring die Einstellung des in Radialrichtung auf die Presselemente und somit das Werkstück wirkenden Drucks. Die Verstellbarkeit kann in einem Bereich bis zu 0,10 mm in radialer Richtung liegen.The two conical, superimposed peripheral surfaces of the race and the clamping ring allow by axial movement of the clamping ring on the axially fixed race adjusting the radial direction acting on the pressing elements and thus the workpiece pressure. The adjustability can be in a range up to 0, 10 mm in the radial direction.
Erfindungsgemäß wird vorgeschlagen, dass in den Presselementen langlochartige Öffnungen ausgebildet sind, in denen bezüglich der Presselemente ortsfeste Führungselemente aufgenommen sind, welche die radiale Bewegung der Presselemente zum Zentrum des Doms bzw. der Ringpresse führen.According to the invention, slot-like openings are formed in the pressing elements, in which stationary guide elements are received with respect to the pressing elements, which guide the radial movement of the pressing elements to the center of the dome or the ring press.
Damit die Rollen während des Abrollens zwischen dem Laufring und dem kontinuierlichen Umfangsrand nicht aneinander stoßen, wird vorgeschlagen, dass zwischen zwei in Umfangsrichtung benachbarten Rollen jeweils ein Distanzstück vorgesehen ist, das am Laufring befestigt ist.Thus, the rollers do not abut each other during rolling between the race and the continuous peripheral edge, it is proposed that between two circumferentially adjacent rollers each have a spacer is provided which is fixed to the race.
Bevorzugt sind die Druckerzeugungsanordnung, die Presselemente und die Führungselemente in axialer Richtung unverschieblich abgestützt und liegen insbesondere auf einer Grundplatte auf. Dabei sind insbesondere die Führungselemente an der Grundplatte befestigt, vorzugsweise verschraubt. Um die Druckerzeugungsanordnung, die Presselemente und die Führungselemente in Axialrichtung an der Grundplatte zu halten, ist vorzugsweise eine Abdeckplatte bzw. ein Flansch vorgesehen, die bzw. der mit der Grundplatte verschraubt ist, wobei diese Verschraubung besonders bevorzugt durch die Führungselemente hindurchgeht und diese damit ebenfalls fixiert sind.Preferably, the pressure generating arrangement, the pressing elements and the guide elements are supported immovably in the axial direction and are in particular on a base plate. In particular, the guide elements are attached to the base plate, preferably screwed. In order to hold the pressure generating arrangement, the pressing elements and the guide elements in the axial direction on the base plate, is preferably a Cover plate or a flange provided, which is or is screwed to the base plate, said screw particularly preferably passes through the guide elements and they are thus also fixed.
Um die Druckerzeugungsanordnung relativ zu den Presselementen zu verdrehen, wird vorgeschlagen, die Druckerzeugungsanordnung durch einen Elektromotor und ein mit diesem gekoppeltes Getriebe anzutreiben. Dabei weist das Getriebe insbesondere ein an einer Welle des Elektromotors angebrachtes Ritzel auf, das mit am Außenumfang des Antriebsrings der Druckerzeugungsanordnung ausgebildeten Zähnen kämmt. Der Elektromotor kann beispielsweise auf der anderen Seite der die Druckerzeugungsanordnung, die Presselemente und die Führungselemente abstützenden Grundplatte befestigt sein, wobei die Welle des Elektromotors durch eine entsprechende Bohrung in der Grundplatte hindurchgeht, so dass das Kämmen zwischen dem an der Welle angebrachten Ritzel und dem Antriebsring ermöglicht ist.In order to rotate the pressure generating arrangement relative to the pressing elements, it is proposed to drive the pressure generating arrangement by an electric motor and a gear coupled thereto. In this case, the gearbox in particular has a pinion attached to a shaft of the electric motor which meshes with teeth formed on the outer circumference of the drive ring of the pressure generating arrangement. The electric motor may be mounted, for example, on the other side of the base plate supporting the pressure generating assembly, the pressing elements and the guide elements, the shaft of the electric motor passing through a corresponding bore in the base plate, so that the meshing between the pinion mounted on the shaft and the drive ring is possible.
Um ein Werkstück über den Dorn der Ringpresse zuzuführen oder es nach dem Pressvorgang aus der Ringpresse zu entnehmen, wird vorgeschlagen, dass die Presselemente durch Rückstellmittel von der Pressstellung in die Freigabestellung bewegbar sind, wenn sich die Rollen in den Senkungen des Profils der kontinuierlichen Umfangsbahn befinden.In order to feed a workpiece over the mandrel of the ring press or to remove it from the ring press after the pressing process, it is proposed that the pressing elements are movable by return means from the pressing position to the release position when the rollers are in the subsidence of the profile of the continuous circumferential path ,
Erfindungsgemäß wird vorgeschlagen, dass in der Ringpresse vorhandenes Schmieröl zur Rückstelldruckerzeugung verwendet wird. Dies erfolgt dadurch, dass Schmieröl, das sich in jeweiligen Zwischenräumen befindet, die zwischen dem Führungselement und einer Langlochöffnung eines jeweiligen Presselements ausgebildet sind, in diesem Zwischenraum in der Pressstellung unter Druck gesetzt wird, derart, dass der aufgebaute hydraulische Druck ausreicht, um das Presselement relativ zum Führungselement radial nach außen zu bewegen, wenn der von den Rollen auf die Presselemente ausgeübte Druck nachlässt.According to the invention it is proposed that in the ring press existing lubricating oil is used for restoring pressure generation. This is done by pressurizing lubricating oil, which is located in respective gaps formed between the guide member and a slot opening of a respective pressing member, in this space in the pressing position such that the built-up hydraulic pressure is sufficient to press the pressing member to move radially outwards relative to the guide element when the one of the Rolls on the pressing elements exerted pressure subsides.
Die Erhebungen und Senkungen im Profil der kontinuierlichen Umfangsbahn sind bevorzugt derart angeordnet, dass die Erhebungen und Senkungen im Profil der kontinuierlichen Umfangsbahn derart angeordnet sind, dass jeweils eine Anzahl n Erhebungen vollständig auf dem äußeren radialen Rand jedes Presselements ausgebildet sind, dass eine Anzahl n-1 Senkungen vollständig auf jedem Presselement ausgebildet sind und dass die zur Vervollständigung des Profils noch erforderlichen Senkungen jeweils zur Hälfte auf in Umfangsrichtung direkt benachbarten Presselementen ausgebildet sind.The elevations and depressions in the profile of the continuous circumferential path are preferably arranged such that the elevations and depressions are arranged in the profile of the continuous circumferential path such that in each case a number n elevations are formed completely on the outer radial edge of each pressing element, that a number n 1 depressions are completely formed on each pressing element and that the still required to complete the profile reductions are formed in each case half in the circumferential direction directly adjacent pressing elements.
Besonders bevorzugt ist eine Ausführungsform, bei der die Ringpresse 24 Rollen und acht Presselemente umfasst, so dass in der Pressstellung jeweils drei Rollen auf ein Presselement wirken. Damit die synchrone Bewegung der Presselemente ermöglicht wird, wird vorgeschlagen, dass die Anzahl Rollen gleich der Anzahl an Erhebungen pro Presselement multipliziert mit der Anzahl der Presselemente ist, und dass die Anzahl der Senkungen gleich der Rollenanzahl bzw. der gesamten Anzahl an Erhebungen ist.Particularly preferred is an embodiment in which the
Bezogen auf die Ausführungsform mit 24 Rollen bedeutet dies, dass ein Presselement n=3 Erhebungen aufweist, die vollständig auf dem äußeren radialen Rand des Presselements ausgebildet sind. Das Profil beginnt entlang der Umfangsrichtung mit einer halben Senkung, danach schließen sich die drei Erhebungen mit jeweils dazwischenliegender vollständiger Senkung an und das Profil wird nach der dritten Erhebung durch eine weitere halbe Senkung abgeschlossen. Wenn nun zwei Presselemente direkt nebeneinander liegen, bilden die jeweiligen halben Senken im Übergangsbereich zwischen den beiden Presselementen eine vollständige Senkung, so dass über den gesamten Umfang der Umfangsbahn die gleiche Anzahl von vollständigen Erhebungen und vollständigen Senkungen ausgebildet ist.With reference to the embodiment with 24 rollers, this means that a pressing element n = 3 has elevations that are completely formed on the outer radial edge of the pressing element. The profile begins along the circumferential direction with a half countersink, then join the three surveys with each intervening complete subsidence and the profile is completed after the third survey by another half reduction. Now, if two pressing elements lie directly next to each other, the respective half-sinks in the transition region between the two pressing elements a complete reduction, so that over the entire circumference of the circumferential path the same number of complete elevations and full subsidence is formed.
Die Erfindung wird nachfolgend anhand einer beispielhaften, nicht einschränkenden Ausführungsform unter Bezugnahme auf die anliegenden Figuren beschrieben.
- Fig. 1
- ist eine Draufsicht in Axialrichtung der Ringpresse, wobei die Ringpresse teilweise geöffnet dargestellt ist.
- Fig. 2
- ist eine Querschnittsdarstellung gemäß der Schnittlinie II-II.
- Fig. 3
- ist eine Vergrößerung der Schnittansicht der
Fig. 2 oberhalb der Drehachse der Ringpresse. - Fig. 4
- ist eine vergrößerte, perspektivische Ansicht der Rollenanordnung in der Ringpresse.
- Fig. 5
- ist eine vergrößerte perspektivische Ansicht eines Presselements.
- Fig. 1
- is a plan view in the axial direction of the ring press, wherein the ring press is shown partially open.
- Fig. 2
- is a cross-sectional view along the section line II-II.
- Fig. 3
- is an enlargement of the sectional view of
Fig. 2 above the axis of rotation of the ring press. - Fig. 4
- is an enlarged perspective view of the roller assembly in the ring press.
- Fig. 5
- is an enlarged perspective view of a pressing member.
In der schematischen Draufsicht gemäß
Entlang dem Innenumfang des Antriebsrings 16 erstreckt sich ein Spannring 18, der vermittels Schrauben 20 am Antriebsring 16 befestigt ist. Der Antriebsring 16 weist bezogen auf die Querschnittsdarstellung der
An ihrem radial äußeren Rand 30 weisen die Presselemente 28 ein regelmäßiges Profil auf, das abwechselnd radiale Erhebungen 32 und Senkungen 34 umfasst, was aus der vergrößerten, perspektivischen Darstellung eines einzelnen Presselements gemäß
Die Presselemente 28 weisen eine langlochförmige Öffnung 36 auf, durch die ein Führungselement 38 hindurchgeht. Dieses Führungselement 38 weist in radialer Richtung eine Länge auf, die etwas kleiner ist als die Länge des Langlochs 36, so dass sich die Presselemente 28 in radialer Richtung relativ zum feststehenden Führungselement 38 bewegen können. Die Führungselemente 38 liegen auf ihrer Rückseite auf der Grundplatte 10 auf und sind mittels einer auf der Vorderseite des Antriebsrings 16 aufliegenden Abdeckplatte 40 in axialer Richtung gehalten. Die Abdeckplatte 40 und die Führungselemente 38 sind durch gemeinsame Schrauben 42 auf der Grundplatte 10 fixiert, wobei die Führungselemente zudem in Vertiefungen aufgenommen sind.The
Die Presselemente 28 werden durch das Abrollen der Rollen 26 auf der kontinuierlichen Umfangsbahn 46 in radialer Richtung R zu einem Dorn 48 bewegt, auf den ein zu bearbeitendes Werkstück, insbesondere eine Hülse 50, aufgeschoben ist. Die Hülse 50 wird durch die jeweils ein Kreisbogensegment bildenden radialen Innenränder 52 der Presselemente 28 beaufschlagt und unter Druck gesetzt, so dass die Hülse 50 zwischen den Presselementen 28 und dem Dorn 50 in ihre endgültige Form gepresst wird. Die dabei durch die Ringpresse erzeugten Drücke sind sehr hoch und betragen bis etwa 100 Tonnen oder auch mehr, was einem Vielfachen, etwa dem 4- bis 6-Fachen, des Drucks entspricht, der durch herkömmliche Ringpressen erzeugt werden kann. Dabei kommt das insbesondere metallische Hülsenmaterial in der Regel in den Fließbereich, so dass eine optimale und präzise Formgebung ermöglicht ist.The
Aufgrund der Profilgebung sind die Presselemente 28 in einer Freigabestellung, wenn sich die Rollen 26 in einer Senkung 34 befinden. In dieser Stellung ist zwischen dem Dorn 48 und den radialen Innenrändern 52 der Presselemente 28 ein ausreichender Abstand gegeben, der das Zuführen eines Werkstücks bzw. das Freigeben eines bereits gepressten Werkstücks 50 ermöglicht. Wenn die Rollen 26 auf einer Erhebung 32 stehen, sind die Presselemente 28 in ihre Pressstellung gedrückt, in der sie eine Hülse 50 konzentrisch gegen den Dorn 48 pressen.Due to the profiling, the
Der Dorn 48 umfasst in seinem Zentrum die Drehachse D der Druckerzeugungsanordnung 12, insbesondere der sich in Umfangsrichtung bewegenden Elemente Antriebsring 16, Spannring 18 und Laufring 24. Bevorzugt ist der Dorn 48 in der Freigabestellung der Presselemente 28 ebenfalls um die Achse D drehbar zusammen mit der aufgeschobenen Hülse 50. Hierdurch können auch diejenigen Bereiche der Hülse in Form gebracht werden, die in einem ersten Pressschritt in Umfangsrichtung genau zwischen zwei benachbarten Presselementen 28 liegen. Es können somit andere Druckstellen und Nahtstellen überbrückt werden bei mehrfachem Pressen.The
Aus der
Das zugeführte Schmiermittel dient bei dieser Ausführungsform auch als Rückstellmittel für die Presselemente 28. Wenn diese durch das Abrollen der Rollen 26 über die Erhebungen 32 in Radialrichtung zur Drehachse D hin unter Druck gesetzt werden, wird Schmiermittel, das sich in einem zwischen Langloch 36 und Führungselement 38 gebildeten Zwischenraum bzw. -kammer 60 befindet, ebenfalls unter Druck gesetzt. Dieser Hydraulikdruck ermöglicht es, dass die Presselemente 28 radial nach außen zurückgestellt werden können, wenn sich die Rollen 26 in einer Senkung 34 der kontinuierlichen Umfangsbahn 46 befinden.The supplied lubricant is used in this embodiment as a return means for the
Bezug nehmend auf die vergrößerte Querschnittsansicht des bezogen auf die
In der
Bezug nehmend auf
Die Presselemente 28 weisen zwischen den radial äußeren und radial inneren Endbereichen 29, 31 eine Aussparung 33 auf, die zur Aufnahme und Verteilung von Schmiermittel dient. Ferner werden durch diese Aussparung 33 die Kontaktflächen zwischen den Presselementen 28 in Umfangsrichtung reduziert.The
Wie oft ein Werkstück 50 bei der Bearbeitung unter Druck gesetzt wird, hängt von der Umlaufzahl der Druckerzeugungsanordnung ab. Beispielsweise führt im gezeigten Ausführungsbeispiel eine Achteldrehung der Druckerzeugungsanordnung 12 zu einem dreimaligen Druckbeaufschlagen der Hülse 50, da während einer solchen Achteldrehung die Rollen 26 über drei Erhebungen 32 abgerollt werden.The number of times a
Es ist noch anzumerken, dass im Ausführungsbeispiel 24 Rollen 26 und ebenso viele Erhebungen 32 und Senkungen 34 auf der Umfangsbahn 30 ausgebildet sind. Dabei befinden sich auf einem Presselement 28 immer drei vollständige Erhebungen 32 und zwei dazwischenliegende vollständige Erhebungen 34. Die übrigen Senkungen 34' werden jeweils durch zwei benachbarte Presselemente 28 gebildet, auf denen jeweils eine halbe Senkung 34' ausgebildet ist. Es ist selbstverständlich möglich, sowohl die Anzahl Presselemente als auch die Anzahl Rollen und die Anzahl von Erhebungen und Senkungen auf der Umfangsbahn zu verändern. Wesentlich bei einer solchen Anpassung ist, dass durch die Abrollbewegung der Rollen über die Erhebungen und Senkungen der Umfangsbahn die synchrone Betätigung der Presselemente ermöglicht ist.It should also be noted that in the
Claims (14)
- Ring press, comprising
a mandrel (48), by means of which an annular workpiece (50) to be pressed can be guided in axial direction to the ring press and on which the workpiece (50) can be supported,
a plurality of pressing elements (28) guided in radial direction (R) by means of which pressure can be exerted onto the workpiece (50) supported on the mandrel (48), and
a pressure generating arrangement (12) that is rotatable in circumferential direction relative to the pressing elements (28), during the rotation of which relative to the pressing elements (28) the pressing elements (28) are moved from a release position to a pressing position, wherein the pressure generating arrangement comprises a plurality of rollers (26) which are rolled to generate pressure over a continuous circumferential track (46) formed by the respective radial outer edges (30) of the pressing elements,
characterised in that elongated hole-like openings (36) are formed in the pressing elements (28), in which openings guiding elements (38) are mounted that are fixed relative to the pressing elements (28), which guiding elements guide the radial movement of the pressing elements (28) to the centre of the mandrel (48) or the ring press, wherein the pressing elements (28) can be moved by hydraulic restoring means, which comprise the guiding elements (38) and the openings (36), from the pressing position into the release position, in that lubricating oil in the respective intermediate spaces, which are formed between a respective guiding element (38) and an opening (36), is put under pressure in the pressing position. - Ring press according to claim 1, characterised in that the circumferential track (46) has a regular profile in circumferential direction with alternately radial elevations (32) and depressions (34, 34') such that when rolling the rollers (26) over an elevation (32) all of the pressing elements (28) are moved synchronously into the pressing position.
- Ring press according to claim 1 or 2, characterised in that the pressure generating arrangement (12) comprises a race (24) on the radial inner side of which the rollers (26) run.
- Ring press according to claim 3, characterised in that the race (24) is configured to be conical on its radial outside (64) in axial direction and bears against the inside (62) of a tension ring (18) of the pressure generating arrangement (12) formed to be counter-conical in axial direction.
- Ring press according to claim 4, characterised in that the tension ring (18) is connected to a drive ring (16) of the pressure generating arrangement (12), in particular is screwed to the latter.
- Ring press according to claim 5, characterised in that the tension ring (18) can be adjusted in axial direction relative to the race (24) and to the drive ring (16) in order to adjust the pressure acting on the workpiece (50).
- Ring press according to any one of the preceding claims, characterised in that between two rollers (26) that are adjacent in circumferential direction a spacer (66) is provided which is secured to the race (24).
- Ring press according to any one of the preceding claims, characterised in that the pressure generating arrangement (12), the pressing elements (28) and the guiding elements (38) are supported non-displaceably in axial direction, in particular lie on a base plate (10).
- Ring press according to claim 8, characterised in that the guiding elements (38) are secured to the base plate (10), in particular are screwed to the latter.
- Ring press according to any one of the preceding claims, characterised in that the pressure generating arrangement (12) is driven by an electric motor (54) and a gear (14) coupled therewith.
- Ring press according to claim 10, characterised in that the gear comprises a pinion (14) attached to a shaft (56) of the electric motor (54), which pinion meshes with teeth (15) formed on the outer circumference of the drive ring (16) of the pressure generating arrangement.
- Ring press according to any one of claims 2 - 11, characterised in that the elevations (32) and depressions (34, 34') are arranged in the profile of the continuous circumferential track (46) such that a number n of elevations (32) are formed completely on the outer radial edge (30) of each pressing element (28), in that a number n-1 of depressions (34) are formed completely on each pressing element and in that the depressions (34') still required to complete the profile (30) are each half formed on pressing elements (28) directly adjacent to one another in circumferential direction.
- Ring press according to claim 12, characterised in that it comprises 24 rollers (26) and 8 pressing elements (28) so that in the pressing position three rollers (26) act on a pressing element (28).
- Ring press according to claim 12 and 13, characterised in that the number of rollers (26) is equal to the number n of elevations (32) per pressing element (28) multiplied by the number of pressing elements (28) and in that the number of depressions (34, 34') is equal to the number of rollers or the total number of elevations (32).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08773813T PL2167257T3 (en) | 2007-07-06 | 2008-07-02 | Ring press |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007031482A DE102007031482A1 (en) | 2007-07-06 | 2007-07-06 | ring Press |
PCT/EP2008/005401 WO2009007048A1 (en) | 2007-07-06 | 2008-07-02 | Ring press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2167257A1 EP2167257A1 (en) | 2010-03-31 |
EP2167257B1 true EP2167257B1 (en) | 2013-02-27 |
Family
ID=39852355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08773813A Not-in-force EP2167257B1 (en) | 2007-07-06 | 2008-07-02 | Ring press |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2167257B1 (en) |
DE (1) | DE102007031482A1 (en) |
ES (1) | ES2401399T3 (en) |
PL (1) | PL2167257T3 (en) |
WO (1) | WO2009007048A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009035205A1 (en) | 2009-07-29 | 2011-02-10 | Otto Bihler Handels-Beteiligungs-Gmbh | Working machine, in particular wire or strip bending machine |
DE102009042441A1 (en) | 2009-09-22 | 2011-03-31 | Otto Bihler Handels-Beteiligungs-Gmbh | Ring press with torque motor |
DE102009042442A1 (en) | 2009-09-22 | 2011-03-31 | Otto Bihler Handels-Beteiligungs-Gmbh | Ring press with hydraulic clamping ring adjustment |
LT6174B (en) | 2013-10-09 | 2015-06-25 | Uab "Elmo Technologijos" | Lighting system utilizing day light |
DE102016207062A1 (en) | 2016-04-26 | 2017-10-26 | Otto Bihler Handels-Beteiligungs-Gmbh | Press with double cam translated driven pressing element |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR793147A (en) * | 1935-07-30 | 1936-01-16 | Chanay & Maitrot | Further training in shrinking machines |
FR857899A (en) * | 1939-07-17 | 1940-10-03 | Chanay & Maitrot | Further training in shrinking machines |
DE2547821A1 (en) * | 1975-10-25 | 1977-04-28 | Erich Ribback | Rotary forging machine with four radial hammers - has rams designed to reduce impact wear and noise |
DE2834360C3 (en) * | 1978-08-04 | 1981-03-19 | Fritz Werner Industrie-Ausrüstungen GmbH, 6222 Geisenheim | Positioning device for the kneading mechanism of a rotary kneading machine in ring type |
JP2887513B2 (en) * | 1990-09-07 | 1999-04-26 | 株式会社ジャロック | Swaging machine |
DE4206260C2 (en) * | 1992-02-28 | 1994-03-03 | Erbsloeh Julius & August | Forming device with at least one ram hammer |
DE19954210B4 (en) * | 1999-11-11 | 2008-04-03 | Volkswagen Ag | swaging machine |
DE10149924A1 (en) * | 2001-10-10 | 2003-04-30 | Uniflex Hydraulik Gmbh | radial press |
-
2007
- 2007-07-06 DE DE102007031482A patent/DE102007031482A1/en not_active Withdrawn
-
2008
- 2008-07-02 WO PCT/EP2008/005401 patent/WO2009007048A1/en active Search and Examination
- 2008-07-02 PL PL08773813T patent/PL2167257T3/en unknown
- 2008-07-02 ES ES08773813T patent/ES2401399T3/en active Active
- 2008-07-02 EP EP08773813A patent/EP2167257B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
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DE102007031482A1 (en) | 2009-01-08 |
EP2167257A1 (en) | 2010-03-31 |
WO2009007048A1 (en) | 2009-01-15 |
ES2401399T3 (en) | 2013-04-19 |
PL2167257T3 (en) | 2013-08-30 |
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