EP2298468A2 - Ring press with torque motor - Google Patents
Ring press with torque motor Download PDFInfo
- Publication number
- EP2298468A2 EP2298468A2 EP20100161861 EP10161861A EP2298468A2 EP 2298468 A2 EP2298468 A2 EP 2298468A2 EP 20100161861 EP20100161861 EP 20100161861 EP 10161861 A EP10161861 A EP 10161861A EP 2298468 A2 EP2298468 A2 EP 2298468A2
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- European Patent Office
- Prior art keywords
- ring
- ring press
- pressing
- drive
- rotor
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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, comprising a mandrel, via which an annular workpiece to be pressed can be fed in the axial direction of the ring press and on which the workpiece is supported, a plurality of radially movable movable pressing elements, with which pressure on the workpiece is exercisable, and a in the circumferential direction relative to the pressing elements rotatable pressure generating arrangement, the rotation of which relative to the pressing elements, the pressing elements are moved from a release position to a pressing position, wherein the pressure generating arrangement comprises a plurality of rollers which is formed to generate pressure via a respective radial outer edges of the pressing elements unwinding continuous circumferential path and wherein the pressure generating arrangement comprises a race on the radial inside of which roll off the rollers.
- Such a ring press is from the DE 10 2007 031 482 A1 known.
- the pressure generating arrangement shown there is driven via a gear transmission, in particular a pinion, which meshes with a drive ring, wherein the pinion is connected by means of a shaft with an electric motor.
- the sleeve can be centered at the beginning of the application of pressure by means of the pressing elements relative to the mandrel.
- the sleeve may initially be held with its inner circumference at a small distance from the outer circumference of the mandrel, since it is held or clamped on its outer circumference by the pressing elements.
- pressure increase is a plastic deformation of the sleeve, wherein the sleeve material is displaced towards the mandrel by radially moving the pressing elements towards the mandrel and then possibly rests against this.
- the plastic deformation generated in particular can lead to a reduction of the inner and outer diameter of the sleeve, wherein the thickness of the sleeve remains substantially the same as before pressing in the ring press or only slightly reduced.
- Such a pressing operation enables the production of sleeves with high dimensional accuracy and precision.
- the object of the invention is to develop a ring press of the known type such that the above disadvantages can be avoided.
- the ring press comprises a drive which is designed such that it can be coupled or coupled to the raceway without transmission, in order to normally transmit the speed generated by the drive or the torque generated unchanged to the raceway.
- Such transmission-free power transmission of the drive power to the race avoids losses in a translating gear such that the movement of the race is substantially identical to the movement of the drive.
- a certain speed per minute or a certain partial rotation in one or the other direction can be precisely controlled and transmitted to the pressure generating device, in particular the race.
- Transmission-free in this context is to be understood that no rotational movements transmitting gears or the like. Are present, which translate to a reduction of the drive generated rotational movement. Transmission-free should not exclude, however, that between the drive and the thus coupled raceway further, be offset by the drive in a similar manner rotatable components, which in particular produce the coupling between the race and the drive.
- the drive is an electrically driven torque motor with a radially inner, forming a hollow shaft rotor and an outer stator.
- the race can be coupled or coupled to the rotor.
- Torque motors are high torque optimized large servo motors where the rotor is normally designed as a hollow shaft.
- the torque motor can be used as a gearless direct drive of the race, which can be generated by the torque motor high torques at relatively low speeds.
- These properties are very important for a ring press according to the present invention, since relatively large sleeves are made with a diameter of up to 15 cm, wherein the material to be processed has a thickness of several millimeters.
- the use of a torque motor as a drive for the ring press allows a compact design, since the drive is installed concentrically around the pressure generating arrangement.
- the raceway is preferably on its radial outer side in the axial direction designed conical and is located on the inside of an axially opposite conical clamping ring of the pressure generating arrangement on.
- the clamping ring is preferably connected to a rotor connected to the drive ring of the pressure generating arrangement or to the rotor, in particular screwed.
- the clamping ring in the axial direction relative to the race and the drive ring or rotor is adjustable to adjust the pressure acting on the race and thus on the workpiece pressure.
- the clamping ring can also be referred to as a collar.
- the clamping ring is frictionally received between the drive ring or rotor and the raceway.
- the rotational movement of the rotor on the raceway transmitting components of the pressure generating arrangement are received substantially free of play and there is no slippage between the individual ring components and the rotor during normal operation of the ring press.
- the frictional connection of the clamping ring is releasable, preferably by establishing hydraulic pressure between the friction surfaces of the clamping ring, the race and the drive ring or rotor.
- the circumferential path of the ring press on a regular profile in the circumferential direction with alternating radial elevations and reductions, such that when rolling the rollers over a survey all the pressing elements are moved synchronously in the pressing position.
- the pressing elements In order to enable the radial advancing movement of the pressing elements, it is proposed that 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.
- the pressure generating arrangement, the pressing elements and the guide elements are preferably supported immovably in the axial direction. They are in particular on a base plate or cover.
- the pressing elements are preferably 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, wherein preferably the return means act hydraulically and / or mechanically or are formed. Such return means allow accelerated change from the press position to the release position.
- the invention also relates to a working machine, in particular wire or strip bending machine, for machining, in particular forming, continuous workpieces with a wall-like basic body which has a front and a rear machining side, with at least one tool unit for machining the workpieces and with a ring press having at least some of the above features.
- a working machine in particular wire or strip bending machine, for machining, in particular forming, continuous workpieces with a wall-like basic body which has a front and a rear machining side, with at least one tool unit for machining the workpieces and with a ring press having at least some of the above features.
- Such machines are used in particular in the production of sleeves made of metal, wherein initially plate-like workpieces are supplied to the tool unit, which have preferably been previously separated from a strip of material.
- the tool unit preferably has a plurality of bending punches, in particular four bending punches, which are designed such that they can transform the bending-type plate-like workpiece into a cylindrical sleeve.
- the sleeve thus formed is transported in the axial direction from the tool unit to the ring press.
- the ring press axially adjoins the tool assembly in the direction of the bending axis, such that the deformed sleeve can be moved by the bending core of the tool assembly via the mandrel of the ring press.
- the sleeve Prior to pressing by means of the pressing members, the sleeve may abut with an axial portion of its inner periphery at the uppermost axial outer peripheral portion of the mandrel.
- the pressing elements are moved towards the sleeve in the radial direction, it is lifted off the mandrel and held centered (concentrically) therewith, in particular forming an annular gap between sleeve and mandrel.
- the sleeve material Upon further pressure build-up, the sleeve material is plastically deformed and displaced by the pressing elements in the direction of the mandrel. In this case, the sleeve experiences in particular a reduction in its inner and outer diameters at approximately constant sleeve thickness.
- the tool unit and the ring press are mounted on the same side of the main body, wherein the ring press covers the tool unit at least partially in the operative state of the machine.
- the tool unit and the ring press are mounted on different sides of the body and that the deformed by the tool unit sleeve can be moved through an opening formed in the body through the ring press.
- the ring press is pivotally mounted on the base body, preferably a orthogonal to the ground vertical axis, such that by pivoting the ring press access to the tool unit is possible.
- the ring press can pivot in such an embodiment door-like away from the tool unit, so that, for example, maintenance work on the bending tools or bending dies can be performed.
- the ring press is locked in the operable state relative to the base body, so that its mandrel is aligned in the axial direction with the bending core of the tool unit.
- the pivoting of the ring press has the further advantage that the back of the ring press is easily accessible.
- Fig. 1 shows a schematic perspective view of a working machine 10 in the form of a bending machine for the production of cylindrical sleeves.
- the Bending machine 10 comprises a standing on a substrate U main body 12, the front processing side 14 can be seen.
- On the front processing side 14 four bending slides 16 a - d are mounted, which are connected via corresponding gear with a mounted behind the front processing side 14 central drive gear 18.
- the bending slides 16a-d move in the radial direction R to a bending core (not visible here) in order to deform a plate-like workpiece into a sleeve by means of a respective bending punch (not visible), wherein the sleeve is bent around the bending axis BA.
- the ring press 18 arranged in front of the bending slides 16a-16d in the axial direction (bending axis BA) with respect to the front machining side 14.
- the ring press 18 is attached by means of two hinges 20a and 20b to a support 22, which is screwed to the base body 12.
- the ring press 18 is thus pivotable about a pivot axis SA, so that the access to the bending slide 16 a - 16 d and Biegestkovn or to one in the Fig. 1 not visible back of the ring press 18 is possible.
- such a bending machine 10 may comprise a feed device, not shown, and a punching device, also not shown, so that from a continuous material (for example, metal strip or the like.) Plate-like workpieces punched and then the forming by the bending slides 16a - 16d and bending punch can be supplied.
- Fig. 2 shows an enlarged view of the ring press 18, wherein the ring press associated covers are removed, so that the view is released into the interior of the ring press 18.
- the ring press comprises a mandrel 24, about the outside of which a sleeve to be machined can be arranged, and with its inner circumference at least partially on the mandrel 24 may occasionally rest.
- a total of 26 designated pressure generating arrangement has a compressive forces during the pressing process drive or pressure ring 28, a clamping or adjusting ring 30 and a
- the drive ring 28 is connected to a trained as a hollow shaft rotor 34 of a torque motor 36.
- the rotor 34 has magnets 38.
- the torque motor 36 comprises a stator 40, in which associated windings and cooling channels are provided. When current flows through the windings, not shown, the rotor 34 is rotated.
- the rotor 34 is driven in the clockwise direction UZ.
- the torque motor can also be operated in the other direction.
- the roller 32 In the radial direction, the roller 32 is followed by rollers 42 and a plurality of pressing elements 44, which are arranged next to each other in the circumferential direction and are very close to their radial outer end portions 46 and at their radial inner end portions 48 in the circumferential direction. In a pressing position, the pressing elements in their end regions 46, 48 may also touch ( Fig. 3 ). At their radially outer edge 50, the pressing elements 44 have a regular profile, which alternately includes radial elevations 52 and countersinks 54. Furthermore, the pressing elements 44 each have a slot-shaped opening 56 through which a guide element 58 passes.
- This guide element 58 has in the radial direction R a length which is slightly smaller than the length of the elongated hole 56, so that the pressing elements 44 can move in the radial direction relative to the fixed guide element 58.
- the pressing elements 44 are moved by the rolling of the rollers 42 on the continuous circumferential path 60 in the radial direction R to the mandrel 24, on which the workpiece to be machined, in particular a sleeve, is pushed.
- the sleeve is acted upon and pressurized by the radial inner edges 62 of the pressing elements 44 which each form a circular arc segment, so that the sleeve is pressed between the pressing elements 44 and the mandrel 24 into their final shape.
- the sleeve can be reduced in diameter inside and outside.
- the pressures generated by the ring press are very high and amount to about 1000 tons.
- the metallic sleeve material usually comes in the area of plastic deformation (flow area or compression area), so that an optimal and precise shaping is possible, which has already been explained in the introduction.
- the generation of such high pressures is promoted by the high torques transmitting torque motor 36.
- Fig. 4 shows a simplified schematic partial sectional view of the ring press 18 according to line IV-IV of Fig. 2 . From this representation, it can be seen that the ring press has on its rear side a base plate 64, which supports the pressure generating arrangement 18 in the axial direction of the bending axis BA. On its front side, the ring press has a cover plate 66, which is screwed to the base plate 64 via the guide elements 58. In the base plate 64, a lubricant supply 68 is further formed, can be supplied via the lubricant in the formed by the base plate 64, the cover plate 66 and the drive or pressure ring 28 Ringpresseninnenraum.
- the lubricant supplied in this embodiment also serves as a return means for the pressing elements 44. If these are pressurized by the rolling of the rollers 42 via the elevations 52 in the radial direction R to the bending axis BA out, lubricant is in a between slot 56 and Guide member 58 formed intermediate space or chamber 70 is also pressurized. This hydraulic pressure allows the pressing members 44 to be returned radially outward when the rollers 42 are in a counterbore 54 of the continuous circumferential path 60.
- Alternatively or supportively prestressed spring elements can also be used in the release position of the pressing elements, as in Fig. 2 indicated at 45.
- the clamping ring 30 and the race 32 have conical contact surfaces 72 and 74, respectively.
- the clamping ring can be adjusted by means of a plurality of adjusting devices 76 with respect to the race 32 and the drive ring 28 in the axial direction become.
- a bias voltage can be adjusted to the pressing elements 44 by the interaction of the inclined contact surfaces 72, 74.
- This adjustability makes it possible to make radial adjustments in the range up to about 0.30 mm.
- the rotational movements generated by the torque motor 36 are transmitted to the rollers 42 by adhesion or frictional engagement between the clamping ring 30 and the race 32.
- a hydraulic adjusting device can be used, which is the subject of the same time filed by the applicant patent application entitled "ring press with hydraulic clamping ring adjustment".
- the contents of this patent application relating to hydraulic tension ring adjustment are incorporated herein by reference.
- the clamping ring adjustment can also be effected by a plurality of circumferentially distributed arranged screws which are manually adjustable, as for example in the DE 10 2007 031 482 A1 was proposed.
- the drive ring 28 is connected in its radially outer region via a plurality of screw connections 78 with the rotor 34 of the torque motor 36.
- the interconnected annular components rotor 34, drive or pressure ring 28, clamping or adjusting ring 30 and race 32 move during operation of the ring press at the same speed and the torque generated by the torque motor 36 can normally without slippage and unchanged the rollers 42 driving the driving ring are transmitted. Since combing gear transmission or the like. Can be dispensed with, the proposed ring press with torque motor is a simplified construction, in which the maintenance is less.
- Cooling channels 80 indicated, it being noted that the stator 40 is not shown here in detail. Furthermore, the stator 40 and the rotor 34 covering elements 84a are indicated.
- Fig. 5 shows in enlarged scale the ring press 18 of Fig. 1 together with the carrier 22 and the hinges 20a, 20b to which the ring press 18 is pivotally mounted about the axis SA.
- a handle 82 is provided on a ring press cover 84a.
- the ring press 18 in the attached state on the working machine 10 (see. Fig. 1 ), so that the mandrel 24 is aligned with the bending core, not shown, of the bending slides 16a-d and the sleeves can be moved by the bending core onto the mandrel 24.
- Fig. 5 shows the ring press with covered interior, wherein a plurality of annular covers 84a - e are used. Between the mandrel 24 and the cover 84 e, an annular gap 86 can be seen, through which the finished sleeve can be conveyed out of the ring press 18.
- Fig. 6 shows the ring press 18 and the carrier 22 of the main body 12 ( Fig. 1 ) facing back.
- the ring press is also covered on its back by annular covers, in Fig. 6 the view of the interior of the ring press is released.
- pressing elements 44 and guide elements 58 and a roller cage 88 can be seen in which the rollers 42 are received.
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Abstract
Description
Die vorliegende Erfindung betrifft eine Ringpresse, umfassend einen Dorn, über den ein zu pressendes ringförmiges Werkstück in Axialrichtung der Ringpresse zuführbar ist und an dem das Werkstück abstützbar ist, mehrere in Radialrichtung geführt bewegliche Presselemente, mit denen Druck auf das Werkstück ausübbar ist, und eine in Umfangsrichtung relativ zu den Presselementen drehbare Druckerzeugungsanordnung, bei deren Verdrehung relativ zu den Presselementen die Presselemente von einer Freigabestellung in eine Pressstellung bewegt werden, wobei die Druckerzeugungsanordnung mehrere Rollen umfasst, die zur Erzeugung von Druck über eine durch die jeweiligen radialen äußeren Ränder der Presselemente gebildete kontinuierliche Umfangsbahn abgerollt werden und wobei die Druckerzeugungsanordnung einen Laufring umfasst, an dessen radialer Innenseite sich die Rollen abwälzen.The present invention relates to a ring press, comprising a mandrel, via which an annular workpiece to be pressed can be fed in the axial direction of the ring press and on which the workpiece is supported, a plurality of radially movable movable pressing elements, with which pressure on the workpiece is exercisable, and a in the circumferential direction relative to the pressing elements rotatable pressure generating arrangement, the rotation of which relative to the pressing elements, the pressing elements are moved from a release position to a pressing position, wherein the pressure generating arrangement comprises a plurality of rollers which is formed to generate pressure via a respective radial outer edges of the pressing elements unwinding continuous circumferential path and wherein the pressure generating arrangement comprises a race on the radial inside of which roll off the rollers.
Eine derartige Ringpresse ist aus der
Bei einer derartigen Ringpresse kann die Hülse zu Beginn der Druckausübung mittels der Presselemente relativ zum Dorn zentriert werden. Dabei kann die Hülse zunächst mit ihrem Innenumfang in geringem Abstand zum Außenumfang des Doms gehalten sein, da sie an ihrem Außenumfang durch die Presselemente gehalten bzw. eingespannt ist. Bei weiterem Fortschreiten des Pressvorgangs (Druckerhöhung) erfolgt eine plastische Verformung der Hülse, wobei durch radiales Bewegen der Presselemente zum Dorn hin das Hülsenmaterial zum Dorn hin verdrängt wird und dann ggf. an diesem anliegt. Die dabei erzeugte plastische Verformung kann insbesondere zu einer Verringerung des Innen- und Außendurchmessers der Hülse führen, wobei die Dicke der Hülse im Wesentlichen gleich bleibt wie vor dem Pressen in der Ringpresse oder nur geringfügig verringert wird. Ein solcher Pressvorgang ermöglicht die Herstellung von Hülsen mit hoher Maßgenauigkeit und Präzision.In such a ring press, the sleeve can be centered at the beginning of the application of pressure by means of the pressing elements relative to the mandrel. In this case, the sleeve may initially be held with its inner circumference at a small distance from the outer circumference of the mandrel, since it is held or clamped on its outer circumference by the pressing elements. Upon further progression of the pressing process (pressure increase) is a plastic deformation of the sleeve, wherein the sleeve material is displaced towards the mandrel by radially moving the pressing elements towards the mandrel and then possibly rests against this. The plastic deformation generated in particular can lead to a reduction of the inner and outer diameter of the sleeve, wherein the thickness of the sleeve remains substantially the same as before pressing in the ring press or only slightly reduced. Such a pressing operation enables the production of sleeves with high dimensional accuracy and precision.
Es hat sich gezeigt, dass ein Antrieb mit einem übersetzenden bzw. untersetzenden Getriebe Nachteile aufweist, wenn auf die Druckerzeugungsanordnung hohe Drehmomente übertragen werden sollen, um hohe Drücke auf das zu bearbeitende Werkstück ausüben zu können. Diese Nachteile liegen insbesondere darin, dass es im Getriebe Kraftübertragungsverluste gibt aufgrund von Spiel und Reibung und dass eine präzise Ansteuerung der Druckerzeugungsanordnung erschwert ist.It has been found that a drive with a translating gear has disadvantages when high torques are to be transmitted to the pressure generating arrangement in order to be able to exert high pressures on the workpiece to be machined. These disadvantages are in particular that there are power transmission losses in the transmission due to play and friction and that a precise control of the pressure generating arrangement is difficult.
Aufgabe der Erfindung ist es, eine Ringpresse der bekannten Art derart weiterzubilden, dass die obigen Nachteile vermieden werden können.The object of the invention is to develop a ring press of the known type such that the above disadvantages can be avoided.
Zur Lösung dieser Aufgabe wird vorgeschlagen, dass die Ringpresse einen Antrieb umfasst, der derart ausgebildet ist, dass er getriebefrei mit dem Laufring koppelbar oder gekoppelt ist, um die vom Antrieb erzeugte Drehzahl bzw. das erzeugte Drehmoment normalerweise unverändert auf den Laufring zu übertragen.To solve this problem, it is proposed that the ring press comprises a drive which is designed such that it can be coupled or coupled to the raceway without transmission, in order to normally transmit the speed generated by the drive or the torque generated unchanged to the raceway.
Eine derartige getriebefreie Kraftübertragung der Antriebsleistung auf den Laufring vermeidet Verluste in einem übersetzenden bzw. untersetzenden Getriebe, so dass die Bewegung des Laufrings im Wesentlichen identisch ist mit der Bewegung des Antriebs. Somit kann durch Ansteuerung des Antriebs, beispielsweise eine bestimmte Drehzahl pro Minute bzw. eine bestimmte Teildrehung in die eine oder andere Drehrichtung präzise angesteuert und auf die Druckerzeugungsanordnung, insbesondere den Laufring übertragen werden. Getriebefrei ist in diesem Zusammenhang so zu verstehen, dass keine Drehbewegungen übertragende Zahnräder oder dgl. vorhanden sind, die zu einer Übersetzung bzw. Untersetzung der vom Antrieb erzeugten Drehbewegung führen. Getriebefrei soll allerdings nicht ausschließen, dass zwischen dem Antrieb und dem damit koppelbaren Laufring weitere, durch den Antrieb in gleichartiger Weise in Drehbewegung versetzbare Bauteile vorgesehen sind, welche insbesondere die Kopplung zwischen dem Laufring und dem Antrieb herstellen.Such transmission-free power transmission of the drive power to the race avoids losses in a translating gear such that the movement of the race is substantially identical to the movement of the drive. Thus, by controlling the drive, for example, a certain speed per minute or a certain partial rotation in one or the other direction can be precisely controlled and transmitted to the pressure generating device, in particular the race. Transmission-free in this context is to be understood that no rotational movements transmitting gears or the like. Are present, which translate to a reduction of the drive generated rotational movement. Transmission-free should not exclude, however, that between the drive and the thus coupled raceway further, be offset by the drive in a similar manner rotatable components, which in particular produce the coupling between the race and the drive.
Bevorzugt ist der Antrieb ein elektrisch angetriebener Torque-Motor mit einem in Radialrichtung innen liegenden, eine Hohlwelle bildenden Rotor und einem außen liegenden Stator. Dabei kann der Laufring mit dem Rotor koppelbar oder gekoppelt sein.Preferably, the drive is an electrically driven torque motor with a radially inner, forming a hollow shaft rotor and an outer stator. In this case, the race can be coupled or coupled to the rotor.
Torque-Motoren sind auf hohe Drehmomente optimierte, große Servomotoren, bei denen der Rotor normalerweise als Hohlwelle ausgeführt ist. Dabei kommen beispielsweise permanent erregte, bürstenlose Gleichstrommotoren, geschaltete Reluktanzmotoren oder Asynchronmotoren als Torque-Motoren in Frage. Der Torque-Motor kann als getriebeloser Direktantrieb des Laufrings verwendet werden, wobei durch den Torque-Motor hohe Drehmomente bei relativ kleinen Drehzahlen erzeugt werden können. Diese Eigenschaften sind für eine Ringpresse gemäß der vorliegenden Erfindung von großer Bedeutung, da relativ große Hülsen mit einer Durchmesser von bis zu 15 cm hergestellt werden, wobei das zu verarbeitende Material eine Stärke von mehreren Millimetern aufweist. Ferner ermöglicht die Verwendung eines Torque-Motors als Antrieb für die Ringpresse eine kompakte Bauweise, da der Antrieb konzentrisch um die Druckerzeugungsanordnung eingebaut ist. Somit kann insbesondere in axialer Richtung Platz gespart werden, verglichen mit einem Antrieb gemäß der
Der Laufring ist auf seiner radialen Außenseite in Axialrichtung vorzugsweise konisch ausgeführt und liegt an der Innenseite eines in Axialrichtung gegenläufig konisch ausgebildeten Spannrings der Druckerzeugungsanordnung an. Dabei ist der Spannring vorzugsweise mit einem mit dem Rotor verbundenen Antriebsring der Druckerzeugungsanordnung oder mit dem Rotor verbunden, insbesondere verschraubt. Gemäß einer vorteilhaften Weiterbildung ist der Spannring in Axialrichtung relativ zum Laufring und zum Antriebsring bzw. Rotor verstellbar, um den auf den Laufring und somit auf das Werkstück wirkenden Druck einstellen zu können. Der Spannring kann auch als Stellring bezeichnet werden.The raceway is preferably on its radial outer side in the axial direction designed conical and is located on the inside of an axially opposite conical clamping ring of the pressure generating arrangement on. In this case, the clamping ring is preferably connected to a rotor connected to the drive ring of the pressure generating arrangement or to the rotor, in particular screwed. According to an advantageous development of the clamping ring in the axial direction relative to the race and the drive ring or rotor is adjustable to adjust the pressure acting on the race and thus on the workpiece pressure. The clamping ring can also be referred to as a collar.
Um die Antriebskraft vom Rotor im Wesentlichen verlustfrei auf den Laufring übertragen zu können, wird vorgeschlagen, dass der Spannring reibschlüssig zwischen dem Antriebsring bzw. Rotor und dem Laufring aufgenommen ist. Somit sind die die Drehbewegung des Rotors auf den Laufring übertragenden Bauteile der Druckerzeugungsanordnung im Wesentlichen spielfrei aufgenommen und es gibt im Normalbetrieb der Ringpresse keinen Schlupf zwischen den einzelnen Ringbauteilen und dem Rotor.In order to transfer the driving force from the rotor substantially lossless on the race, it is proposed that the clamping ring is frictionally received between the drive ring or rotor and the raceway. Thus, the rotational movement of the rotor on the raceway transmitting components of the pressure generating arrangement are received substantially free of play and there is no slippage between the individual ring components and the rotor during normal operation of the ring press.
Zur Verstellung des Spannrings in Axialrichtung wird vorgeschlagen, dass die reibschlüssige Verbindung des Spannrings lösbar ist, vorzugsweise durch Aufbau von Hydraulikdruck zwischen den reibschlüssig miteinander in Kontakt stehenden Reibflächen des Spannrings, des Laufrings und des Antriebsrings bzw. Rotors. In Bezug auf eine derartige hydraulische Verstellung des Spannrings wird auf die zeitgleich eingereichte Patentanmeldung der Anmelderin mit dem Titel "Ringpresse mit hydraulischer Spannringverstellung" hingewiesen, deren Inhalt hinsichtlich der Spannringverstellung hier durch Bezugnahme aufgenommen wird.To adjust the clamping ring in the axial direction, it is proposed that the frictional connection of the clamping ring is releasable, preferably by establishing hydraulic pressure between the friction surfaces of the clamping ring, the race and the drive ring or rotor. With regard to such a hydraulic adjustment of the clamping ring is made to the simultaneously filed patent application of the applicant with the title "ring press with hydraulic clamping ring adjustment", the content of which is incorporated herein by reference with respect to the clamping ring adjustment.
Vorzugsweise weist die Umfangsbahn der Ringpresse ein in Umfangsrichtung regelmäßiges Profil mit sich abwechselnden radialen Erhebungen und Senkungen auf, derart, dass beim Abrollen der Rollen über eine Erhebung alle Presselemente synchron in die Pressstellung bewegt werden.Preferably, the circumferential path of the ring press on a regular profile in the circumferential direction with alternating radial elevations and reductions, such that when rolling the rollers over a survey all the pressing elements are moved synchronously in the pressing position.
Um die radiale Zustellbewegung der Presselemente zu ermöglichen, wird vorgeschlagen, dass in den Presselementen insbesondere 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. Zu diesem Zweck sind die Druckerzeugungsanordnung, die Presselemente und die Führungselemente vorzugsweise in axialer Richtung unverschieblich abgestützt. Sie liegen insbesondere auf einer Grundplatte bzw. Abdeckung auf.In order to enable the radial advancing movement of the pressing elements, it is proposed that 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. For this purpose, the pressure generating arrangement, the pressing elements and the guide elements are preferably supported immovably in the axial direction. They are in particular on a base plate or cover.
Die Presselemente sind vorzugsweise durch Rückstellmittel von der Pressstellung in die Freigabestellung bewegbar, wenn sich die Rollen in den Senkungen des Profils der kontinuierlichen Umfangsbahn befinden, wobei vorzugsweise die Rückstellmittel hydraulisch oder/und mechanisch wirken bzw. ausgebildet sind. Derartige Rückstellmittel ermöglichen ein beschleunigtes Wechseln von der Pressstellung in die Freigabestellung.The pressing elements are preferably 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, wherein preferably the return means act hydraulically and / or mechanically or are formed. Such return means allow accelerated change from the press position to the release position.
Die Erfindung betrifft nach einem weiteren Aspekt auch eine Arbeitsmaschine, insbesondere Draht- oder Bandbiegemaschine, zur Bearbeitung, insbesondere Umformung, von durchlaufenden Werkstücken, mit einem auf einem Untergrund stehenden, wandartigen Grundkörper, der eine vordere und eine hintere Bearbeitungsseite aufweist, mit wenigstens einem Werkzeugaggregat zur Bearbeitung der Werkstücke und mit einer Ringpresse, die wenigstens einige der obigen Merkmale aufweist. Derartige Arbeitsmaschinen kommen insbesondere bei der Herstellung von Hülsen aus Metall zum Einsatz, wobei zunächst plattenartige Werkstücke dem Werkzeugaggregat zugeführt werden, die vorzugsweise zuvor von einem Materialband abgetrennt worden sind.According to a further aspect, the invention also relates to a working machine, in particular wire or strip bending machine, for machining, in particular forming, continuous workpieces with a wall-like basic body which has a front and a rear machining side, with at least one tool unit for machining the workpieces and with a ring press having at least some of the above features. Such machines are used in particular in the production of sleeves made of metal, wherein initially plate-like workpieces are supplied to the tool unit, which have preferably been previously separated from a strip of material.
Das Werkzeugaggregat weist vorzugsweise mehrere Biegestempel, insbesondere vier Biegestempel, auf, die derart ausgebildet sind, dass sie das am Biegekern anliegende plattenartige Werkstück zu einer zylindrischen Hülse umformen können. Nach diesem ersten Umformschritt wird die so geformte Hülse in axialer Richtung vom Werkzeugaggregat zur Ringpresse transportiert.The tool unit preferably has a plurality of bending punches, in particular four bending punches, which are designed such that they can transform the bending-type plate-like workpiece into a cylindrical sleeve. After this first forming step, the sleeve thus formed is transported in the axial direction from the tool unit to the ring press.
Hierzu wird vorgeschlagen, dass sich die Ringpresse in Richtung der Biegeachse axial an das Werkzeugaggregat anschließt, derart, dass die umgeformte Hülse vom Biegekern des Werkzeugaggregats über den Dorn der Ringpresse bewegt werden kann. Vor dem Pressen mittels der Presselemente kann die Hülse mit einem axialen Abschnitt ihres Innenumfangs am obersten axialen Außenumfangsabschnitt des Doms anliegen. Sobald die Presselemente in radialer Richtung auf die Hülse zu bewegt werden, wird diese vom Dorn abgehoben und zentriert (konzentrisch) zu diesem gehalten, insbesondere unter Ausbildung eines Ringspalts zwischen Hülse und Dorn. Bei weiterem Druckaufbau wird das Hülsenmaterial plastisch verformt und durch die Presselemente in Richtung Dorn verdrängt. Dabei erfährt die Hülse insbesondere eine Verringerung ihres Innen- und Außendurchmessers bei etwa gleich bleibender Hülsendicke.For this purpose, it is proposed that the ring press axially adjoins the tool assembly in the direction of the bending axis, such that the deformed sleeve can be moved by the bending core of the tool assembly via the mandrel of the ring press. Prior to pressing by means of the pressing members, the sleeve may abut with an axial portion of its inner periphery at the uppermost axial outer peripheral portion of the mandrel. As soon as the pressing elements are moved towards the sleeve in the radial direction, it is lifted off the mandrel and held centered (concentrically) therewith, in particular forming an annular gap between sleeve and mandrel. Upon further pressure build-up, the sleeve material is plastically deformed and displaced by the pressing elements in the direction of the mandrel. In this case, the sleeve experiences in particular a reduction in its inner and outer diameters at approximately constant sleeve thickness.
Gemäß einer bevorzugten Ausführungsform sind das Werkzeugaggregat und die Ringpresse auf der gleichen Bearbeitungsseite des Grundkörpers angebracht, wobei die Ringpresse im betriebsfähigen Zustand der Arbeitsmaschine das Werkzeugaggregat wenigstens teilweise verdeckt. Alternativ ist es auch denkbar, dass das Werkzeugaggregat und die Ringpresse auf verschiedenen Seiten des Grundkörpers angebracht sind und dass die durch das Werkzeugaggregat umgeformte Hülse durch eine im Grundkörper ausgebildete Öffnung hindurch zur Ringpresse bewegt werden kann.According to a preferred embodiment, the tool unit and the ring press are mounted on the same side of the main body, wherein the ring press covers the tool unit at least partially in the operative state of the machine. Alternatively, it is also conceivable that the tool unit and the ring press are mounted on different sides of the body and that the deformed by the tool unit sleeve can be moved through an opening formed in the body through the ring press.
Im Falle der Anordnung von Ringpresse und Werkzeugaggregat auf der gleichen Bearbeitungsseite des Grundkörpers wird vorgeschlagen, dass die Ringpresse schwenkbar am Grundkörper gelagert ist, vorzugsweise um eine zum Untergrund orthogonale Vertikalachse, derart, dass durch Verschwenken der Ringpresse der Zugang zum Werkzeugaggregat ermöglicht ist. Die Ringpresse lässt sich bei einer derartigen Ausgestaltung türartig vom Werkzeugaggregat weg schwenken, so dass beispielsweise Wartungsarbeiten an den Biegewerkzeugen bzw. Biegestempeln durchgeführt werden können. Selbstverständlich wird die Ringpresse im betriebsfähigen Zustand relativ zum Grundkörper verriegelt, so dass ihr Dorn in axialer Richtung mit dem Biegekern des Werkzeugaggregats fluchtet. Das Verschwenken der Ringpresse hat den weiteren Vorteil, dass auch die Rückseite der Ringpresse einfach zugänglich ist.In the case of the arrangement of ring press and tool unit on the same side of the main body processing is proposed that the ring press is pivotally mounted on the base body, preferably a orthogonal to the ground vertical axis, such that by pivoting the ring press access to the tool unit is possible. The ring press can pivot in such an embodiment door-like away from the tool unit, so that, for example, maintenance work on the bending tools or bending dies can be performed. Of course, the ring press is locked in the operable state relative to the base body, so that its mandrel is aligned in the axial direction with the bending core of the tool unit. The pivoting of the ring press has the further advantage that the back of the ring press is easily accessible.
Die Erfindung wird nachfolgend unter Bezugnahme auf die anliegenden Figuren beispielhaft und nicht einschränkend anhand einer Ausführungsform beschrieben.
- Fig. 1
- zeigt in schematischer Pespektivdarstellung eine Arbeitsma- schine mit Werkzeugaggregat und Ringpresse.
- Fig. 2
- zeigt die Ringpresse der
Fig. 1 in schematischer, vergrößerter Perspektivdarstellung, wobei der Blick auf das Innenleben der Ringpresse freigegeben ist. - Fig. 3
- zeigt eine vergrößerte Teildarstellung der Druckerzeugungsan- ordnung der Ringpresse.
- Fig. 4
- zeigt eine schematische Teilschnittdarstellung entsprechend der Schnittlinie IV-IV der
Fig. 2 . - Fig. 5
- zeigt die Ringpresse der
Fig. 2 mit aufgesetzten Abdeckungen und mit einer Schwenkvorrichtung, welche an einem Grundkör- per der Arbeitsmaschine befestigt werden kann. - Fig. 6
- zeigt die Ringpresse von ihrer hinteren Seite, also der dem Werkzeugaggregat der
Fig. 1 zugewandten Seite, wobei nicht alle Abdeckungen dargestellt sind.
- Fig. 1
- shows a schematic perspective view of a working machine with tool unit and ring press.
- Fig. 2
- shows the ring press of
Fig. 1 in a schematic, enlarged perspective view, the view is released on the inner workings of the ring press. - Fig. 3
- shows an enlarged partial view of the pressure generating arrangement of the ring press.
- Fig. 4
- shows a schematic partial sectional view corresponding to the section line IV-IV of
Fig. 2 , - Fig. 5
- shows the ring press of
Fig. 2 with attached covers and with a pivoting device which can be attached to a base body of the working machine. - Fig. 6
- shows the ring press from its rear side, so the tool unit of
Fig. 1 facing side, not all covers are shown.
Nachdem die Hülse durch die Biegeschlitten 16a - 16d und Biegestempel umgebogen worden ist, wird sie der bezogen auf die vordere Bearbeitungsseite 14 in axialer Richtung (Biegeachse BA) vor den Biegeschlitten 16a - 16d angeordneten Ringpresse 18 zugeführt. Die Ringpresse 18 ist mittels zweier Scharniere 20a und 20b an einem Träger 22 angebracht, welcher mit dem Grundkörper 12 verschraubt ist. Die Ringpresse 18 ist somit um eine Schwenkachse SA verschwenkbar, so dass der Zugang zu den Biegeschlitten 16a - 16d und Biegestempeln bzw. zu einer in der
Der Vollständigkeit halber wird darauf hingewiesen, dass eine derartige Biegemaschine 10 eine nicht dargestellte Einzugsvorrichtung und eine ebenfalls nicht dargestellte Stanzvorrichtung umfassen kann, so dass von einem Endlosmaterial (beispielsweise Metallband oder dgl.) plattenartige Werkstücke ausgestanzt und dann dem Umformen durch die Biegeschlitten 16a - 16d und Biegestempel zugeführt werden können.For the sake of completeness, it should be noted that such a
Laufring 32 auf. Der Antriebsring 28 ist mit einem als Hohlwelle ausgebildeten Rotor 34 eines Torque-Motors 36 verbunden. Entlang seinem radial äußeren Umfang weist der Rotor 34 Magnete 38 auf. Der Torque-Motor 36 umfasst einen Stator 40, in welchem zugehörige Wicklungen sowie Kühlkanäle vorgesehen sind. Wenn durch die nicht dargestellten Wicklungen Strom fließt, wird der Rotor 34 in Drehbewegung versetzt. Beispielhaft wird hier angenommen, dass der Rotor 34 im Uhrzeigersinn UZ angetrieben wird. Selbstverständlich kann der Torque-Motor auch in der anderen Richtung betrieben werden.
In radialer Richtung schließen sich an den Laufring 32 Rollen 42 und mehrere Presselemente 44 an, die in Umfangsrichtung nebeneinander angeordnet sind und sich an ihren radialen äußeren Endbereichen 46 und an ihren radialen inneren Endbereichen 48 in Umfangsrichtung sehr nahe liegen. In einer Pressstellung können sich die Presselemente in ihren Endbereichen 46, 48 ggf. auch berühren (
Das zugeführte Schmiermittel dient bei dieser Ausführungsform auch als Rückstellmittel für die Presselemente 44. Wenn diese durch das Abrollen der Rollen 42 über die Erhebungen 52 in Radialrichtung R zur Biegeachse BA hin unter Druck gesetzt werden, wird Schmiermittel, das sich in einem zwischen Langloch 56 und Führungselement 58 gebildeten Zwischenraum bzw. -kammer 70 befindet, ebenfalls unter Druck gesetzt. Dieser Hydraulikdruck ermöglicht es, dass die Presselemente 44 radial nach außen zurückgestellt werden können, wenn sich die Rollen 42 in einer Senkung 54 der kontinuierlichen Umfangsbahn 60 befinden. Alternativ oder unterstützend können auch in die Freigabestellung der Presselemente vorgespannte Federelemente eingesetzt werden, wie in
Der Spannring 30 und der Laufring 32 weisen konische Kontaktflächen 72 bzw. 74 auf. Der Spannring kann mittels mehrerer Verstelleinrichtungen 76 bezüglich des Laufrings 32 und des Antriebsrings 28 in Axialrichtung verstellt werden. Dabei kann durch das Zusammenwirken der geneigten Kontaktflächen 72, 74 eine Vorspannung auf die Presselemente 44 eingestellt werden. Diese Verstellbarkeit ermöglicht es, radiale Verstellungen im Bereich bis etwa 0,30 mm vorzunehmen. Die vom Torque-Motor 36 erzeugten Drehbewegungen werden durch Kraftschluss bzw. Reibschluss zwischen dem Spannring 30 und dem Laufring 32 auf die Rollen 42 übertragen. Zur Verstellung des Spannrings kann eine hydraulische Verstelleinrichtung eingesetzt werden, die Gegenstand der zeitgleich von der Anmelderin eingereichten Patentanmeldung mit dem Titel "Ringpresse mit hydraulischer Spannringverstellung" ist. Der die hydraulische Spannringverstellung betreffende Inhalt dieser Patentanmeldung wird hier durch Bezugnahme aufgenommen. Alternativ kann die Spannringverstellung auch durch mehrere in Umfangsrichtung verteilt angeordnete Schrauben bewirkt werden, die manuell einstellbar sind, wie dies beispielsweise in der
Der Antriebsring 28 ist in seinem radial äußeren Bereich über mehrere Schraubverbindungen 78 mit dem Rotor 34 des Torque-Motors 36 verbunden. Die miteinander verbundenen ringförmigen Bauteile Rotor 34, Antriebs- bzw. Druckring 28, Spann- bzw. Stellring 30 und Laufring 32 bewegen sich im Betrieb der Ringpresse mit gleicher Drehzahl und das vom Torque-Motor 36 erzeugte Drehmoment kann im Normalfall ohne Schlupf und unverändert auf den die Rollen 42 antreibenden Laufring übertragen werden. Da auf kämmende Zahnradgetriebe oder dgl. verzichtet werden kann, stellt die vorgeschlagene Ringpresse mit Torque-Motor eine vereinfachte Konstruktion dar, bei der auch der Wartungsaufwand geringer ist. Beim Stator 40 sind in
Claims (15)
einen Dorn (24), über den ein zu pressendes ringförmiges Werkstück in Axialrichtung (BA) der Ringpresse (18) zuführbar ist und an dem das Werkstück abstützbar ist,
mehrere in Radialrichtung (R) geführt bewegliche Presselemente (44), mit denen Druck (24) auf das Werkstück ausübbar ist, und
eine in Umfangsrichtung relativ zu den Presselementen (44) drehbare Druckerzeugungsanordnung (26), bei deren Verdrehung relativ zu den Presselementen (44) die Presselemente (44) von einer Freigabestellung in eine Pressstellung bewegt werden, wobei die Druckerzeugungsanordnung (26) mehrere Rollen (42) umfasst, die zur Erzeugung von Druck über eine durch die jeweiligen radialen äußeren Ränder (50) der Presselemente (44) gebildete kontinuierliche Umfangsbahn (60) abgerollt werden und wobei die Druckerzeugungsanordnung (26) einen Laufring (32) umfasst, an dessen radialer Innenseite sich die Rollen (42) abwälzen,
dadurch gekennzeichnet, dass sie einen Antrieb (36) umfasst, der derart ausgebildet ist, dass er getriebefrei mit dem Laufring (32) koppelbar oder gekoppelt ist, um die vom Antrieb (36) erzeugte Drehzahl bzw. das erzeugte Drehmoment normalerweise unverändert auf den Laufring (32) zu übertragen.Ring press, comprising
a mandrel (24), via which an annular workpiece to be pressed can be fed in the axial direction (BA) of the ring press (18) and on which the workpiece can be supported,
a plurality of movable in the radial direction (R) guided pressing elements (44), with which pressure (24) on the workpiece is exercised, and
a pressure generating assembly (26) rotatable in the circumferential direction relative to the pressing members (44), which, when rotated relative to the pressing members (44), move the pressing members (44) from a release position to a pressing position, the pressure generating assembly (26) including a plurality of rollers (42 ) which are unrolled to generate pressure via a continuous circumferential path (60) formed by the respective radially outer edges (50) of the pressing members (44), and wherein the pressure generating assembly (26) comprises a race (32) at the radially inner side thereof roll off the rollers (42),
characterized in that it comprises a drive (36) adapted to be coupled or coupled to the running ring (32) in a gearless manner by the speed or torque generated by the drive (36) normally unchanged on the race (32).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009042441A DE102009042441A1 (en) | 2009-09-22 | 2009-09-22 | Ring press with torque motor |
Publications (3)
Publication Number | Publication Date |
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EP2298468A2 true EP2298468A2 (en) | 2011-03-23 |
EP2298468A3 EP2298468A3 (en) | 2015-06-24 |
EP2298468B1 EP2298468B1 (en) | 2016-06-29 |
Family
ID=43430899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP10161861.9A Not-in-force EP2298468B1 (en) | 2009-09-22 | 2010-05-04 | Ring press with torque motor |
Country Status (3)
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EP (1) | EP2298468B1 (en) |
DE (1) | DE102009042441A1 (en) |
ES (1) | ES2581238T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107116168A (en) * | 2017-07-05 | 2017-09-01 | 湖北唯思凌科装备制造有限公司 | A kind of tubing string swager for processing inner spline gear |
DE102016207062A1 (en) | 2016-04-26 | 2017-10-26 | Otto Bihler Handels-Beteiligungs-Gmbh | Press with double cam translated driven pressing element |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007031482A1 (en) | 2007-07-06 | 2009-01-08 | Otto Bihler Maschinenfabrik Gmbh & Co Kg | ring Press |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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AT368728B (en) * | 1981-01-21 | 1982-11-10 | Gfm Fertigungstechnik | FORGING MACHINE |
EP0919310B1 (en) * | 1997-11-13 | 2001-03-14 | GFM Beteiligungs- und Management GmbH & Co KG | Swaging machine |
DE19955321B4 (en) * | 1999-11-17 | 2008-02-07 | Volkswagen Ag | Rotary swaging machine with hydraulic force compensation |
DE10047025C2 (en) * | 2000-09-22 | 2002-11-21 | Uniflex Hydraulik Gmbh | radial press |
DE10149924A1 (en) * | 2001-10-10 | 2003-04-30 | Uniflex Hydraulik Gmbh | radial press |
-
2009
- 2009-09-22 DE DE102009042441A patent/DE102009042441A1/en not_active Withdrawn
-
2010
- 2010-05-04 EP EP10161861.9A patent/EP2298468B1/en not_active Not-in-force
- 2010-05-04 ES ES10161861.9T patent/ES2581238T3/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007031482A1 (en) | 2007-07-06 | 2009-01-08 | Otto Bihler Maschinenfabrik Gmbh & Co Kg | ring Press |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016207062A1 (en) | 2016-04-26 | 2017-10-26 | Otto Bihler Handels-Beteiligungs-Gmbh | Press with double cam translated driven pressing element |
CN107116168A (en) * | 2017-07-05 | 2017-09-01 | 湖北唯思凌科装备制造有限公司 | A kind of tubing string swager for processing inner spline gear |
CN107116168B (en) * | 2017-07-05 | 2018-12-18 | 湖北唯思凌科装备制造有限公司 | A kind of tubing string swager of processable inner spline gear |
Also Published As
Publication number | Publication date |
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EP2298468A3 (en) | 2015-06-24 |
ES2581238T3 (en) | 2016-09-02 |
EP2298468B1 (en) | 2016-06-29 |
DE102009042441A1 (en) | 2011-03-31 |
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