EP2556906B1 - Device for forging a hollow body - Google Patents
Device for forging a hollow body Download PDFInfo
- Publication number
- EP2556906B1 EP2556906B1 EP12173396.8A EP12173396A EP2556906B1 EP 2556906 B1 EP2556906 B1 EP 2556906B1 EP 12173396 A EP12173396 A EP 12173396A EP 2556906 B1 EP2556906 B1 EP 2556906B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- segments
- forging
- core
- hollow body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005242 forging Methods 0.000 title claims description 43
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 239000011796 hollow space material Substances 0.000 claims 2
- 241000600039 Chromis punctipinnis Species 0.000 description 3
- 239000003779 heat-resistant material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 235000010829 Prunus spinosa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
Definitions
- the invention relates to a device for forging a hollow body with centrally symmetrically arranged around a forging axis forging tools and a forging mandrel.
- the forging of hollow bodies has the advantage over the known rolling methods for producing such hollow bodies, inter alia, that different outer shapes of the hollow body can be produced due to the comparatively simple replacement of the forging tools and the generally possible possibility of tool adjustment.
- this does not apply to the inner shape of the hollow body defining forging mandrels, which are made of a heat-resistant material and must have a respective inner diameter of the hollow body corresponding outer diameter, so that for different inner contours of the hollow body to be produced each separate forged mandrels must be used.
- a generic device for forging is from the Japanese document JP-A-63309347 known,
- the invention is therefore based on the object to reduce the costs associated with the conversion of forging devices for the production of hollow bodies with different cavity dimensions effort, in particular with regard to the storage of the forged mandrels.
- the invention solves the problem set by the characterizing features of claim 1. Since this measure can be used for different diameters of the cavity of the hollow body to be manufactured a uniform mandrel core, while for the formation of the inner contour assigning the hollow body authoritative shaping surfaces mandrel segments, which are held interchangeable on the mandrel core, there is the possibility to use the respective inner diameters of the finished hollow body adapted mandrel segments without having to replace the mandrel core.
- mandrel segments can be thermally insulated from the mandrel core, so that the mandrel core can be largely relieved of higher thermal loads.
- favorable conditions for a possible cooling or heating of the mandrel segments which can be connected via appropriate in the mandrel core lines for a cooling or heating medium to appropriate cooling or heating.
- the holder of the mandrel segments on the mandrel core can be solved constructively in different ways.
- a simple way to replace the mandrel segments without special effort is to insert the mandrel segments in undercut grooves of the mandrel core form fit. It is basically possible to arrange the undercut grooves parallel or transverse to the mandrel axis, so that the mandrel segments are detected once along their longitudinal edges and the other times the front side.
- the undercut grooves may be incorporated in the mandrel core.
- Particularly simple construction conditions arise when at least one side wall of the undercut grooves is formed as releasably connected to the mandrel core profile strip, because in this case, the associated mandrel segments can be removed transversely to the longitudinal direction of the undercut groove from the mandrel core by loosening this profile.
- mandrel segments can be used in their radial extent. So that the required number of different mandrel segments can be kept small, the mandrel segments can be supported by spacers on the mandrel core. By adjustable or replaceable spacers thus the diameter of the enveloping circles of the mandrel segments can be adapted to the inner dimensions of the hollow body to be produced without having to replace the mandrel segments.
- the deviations of the shaping surfaces of the mandrel segments from the respective enveloping circle does not matter if the hollow body to be manufactured is rotated accordingly with respect to the forging mandrel.
- the mandrel segments distributed over the circumference of the mandrel core can also be used for the production of hollow bodies with longitudinally grooved cavities.
- both the mandrel segments and the peripheral portions of the mandrel core between the mandrel segments form molding surfaces for the cavity of the hollow body.
- the forging mandrel is rotated with the workpiece.
- Fig. 1 are forging a hollow body 1, in the case of the embodiment, a pipe, forged to a center axis symmetrically arranged forging tools 2, which cooperate with a forging mandrel 3.
- the hollow body 1 is conveyed by means of a clamping device 4 in the feed direction 5 between the forging tools 2, which beat the hollow body 1 against the forging mandrel 3.
- the hollow body 1 can be issued if necessary, a rotation about the forging axis.
- the forging mandrel 3 is conventionally attached to a mandrel bar 6, via which, depending on the forging conditions, a lubricant and cooling or heating media can be supplied to the forging mandrel 3.
- the forging mandrel 3 can also be driven in rotation, if required by the use.
- the forging mandrel 3 differs from conventional forged mandrels because it is composed of a mandrel core 7 and mandrel segments 8, which are distributed around the circumference of the mandrel core 7 depending on the circumferential distribution of the forging tools 2 and form mold surfaces 9 for the cavity of the hollow body 1. Like that Fig. 3 to 7 can be removed, are different ways to support the mandrel segments 8 on the mandrel core 7 available. After the FIGS. 2 and 3 the mandrel segments 8 are guided in longitudinal grooves 10 of the mandrel core 7 and frontally clamped in the radial direction.
- the mandrel core 7 for receiving the end of the mandrel segments 8 undercuts 11 which cooperate with undercuts 12 of the profile strips 13, so that between the undercuts 11 of the mandrel core 7 and the undercuts 12 of the profile strips 3 undercut grooves for receiving the end in the longitudinal grooves 10 guided mandrel segments 8 result.
- the mandrel core 7 has dovetail-shaped undercut grooves 14 for the positive retention of the mandrel segments 8.
- the mandrel segments 8 according to the 6 and 7 are also held in undercut grooves 14, but these undercut grooves 14 in the embodiment of the 6 and 7 formed by the groove walls forming profile strips 15.
- the mandrel segments 8 can be supported by spacers 16 on the mandrel core 7. About this spacer 16 thus the enveloping circle of the mandrel segments 8 can be adapted to the respective requirements.
- the spacers 16 may also serve for the thermal insulation of the mandrel core 7 relative to the mandrel segments 8.
- the mandrel segments 8 can be made of different materials. In order not to have to produce the entire mandrel segments 8 made of a heat-resistant material, the mandrel segments 8 may be constructed of a supporting body 17 and the forming surfaces 9 forming, heat-resistant wear body 18, as for example the Fig. 3 and 4 can be removed.
- Fig. 5 and 7 is the possibility of cooling or heating of the mandrel segments 8 indicated by channels 19 are formed in the mandrel core 7 for guiding a cooling or heating medium, which are connected via the mandrel 6 to a cooling or heating.
- the embodiment of the forging mandrel 3 according to the 8 and 9 differs from the other embodiments in that the mandrel segments 8 are mounted radially adjustable on the mandrel core 7, via a wedge gear 20.
- These wedge gear 20 for the individual mandrel segments 8 have the mandrel core 7 associated wedge surfaces 21 which with counter wedge surfaces 22 of Thorn segments 8 cooperate, which are guided longitudinally displaceably in dovetail-shaped undercut grooves 23 of the mandrel core 7 in order to prevent a radial lifting of the mandrel segments 8 from the mandrel core 7.
- the mandrel segments 8 are connected to an adjusting sleeve 24, via which the mandrel segments 8 can be displaced axially relative to the mandrel core 7, whereby due to the cooperating wedge surfaces 21 and 22, a radial displacement of the mandrel segments 8 is connected.
- This radial movement of the mandrel segments 8 relative to the adjusting sleeve 24 is ensured by a corresponding guide of the adjusting sleeve 24 in radially extending undercut grooves 25.
- the position of the mandrel segments 8 is shown in the radially extended and radially retracted position.
- peripheral portions 26 of the mandrel core 7 between the mandrel segments 8 can also serve as forming surfaces for forming the inner wall of the hollow body when the forging mandrel participates in the rotational movements of the hollow body during the forging process.
- hollow body 1 can be produced with internal grooves, which can also have a different depth over their length in a continuous adjustment of the wedge gear.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Schmieden eines Hohlkörpers mit zentrisch symmetrisch um eine Schmiedeachse angeordneten Schmiedewerkzeugen und mit einem Schmiededorn.The invention relates to a device for forging a hollow body with centrally symmetrically arranged around a forging axis forging tools and a forging mandrel.
Das Schmieden von Hohlkörpern, insbesondere von Rohren, hat gegenüber den bekannten Walzverfahren zur Herstellung solcher Hohlkörper unter anderem den Vorteil, dass unterschiedliche Außenformen des Hohlkörpers aufgrund des vergleichsweise einfachen Austauschs der Schmiedewerkzeuge und der im Allgemeinen gegebenen Möglichkeit der Werkzeugverstellung hergestellt werden können. Dies gilt jedoch nicht für die die Innenform des Hohlkörpers bestimmenden Schmiededorne, die aus einem hitzebeständigen Werkstoff gefertigt werden und einen dem jeweiligen Innendurchmessers des Hohlkörpers entsprechenden Außendurchmesser aufweisen müssen, sodass für unterschiedliche Innenkonturen der zu fertigenden Hohlkörper jeweils gesonderte Schmiededorne zum Einsatz kommen müssen.The forging of hollow bodies, in particular of tubes, has the advantage over the known rolling methods for producing such hollow bodies, inter alia, that different outer shapes of the hollow body can be produced due to the comparatively simple replacement of the forging tools and the generally possible possibility of tool adjustment. However, this does not apply to the inner shape of the hollow body defining forging mandrels, which are made of a heat-resistant material and must have a respective inner diameter of the hollow body corresponding outer diameter, so that for different inner contours of the hollow body to be produced each separate forged mandrels must be used.
Um die Standzeit von wärmebelasteten Schmiededornen zu erhöhen, ist es bekannt (
Eine gattungsgemässe Vorrichtung zum Schmieden ist aus der japanischen Druckschrift
Der Erfindung liegt somit die Aufgabe zugrunde, den mit dem Umrüsten von Schmiedevorrichtungen zur Herstellung von Hohlkörpern mit unterschiedlichen Hohlraumabmessungen verbundenen Aufwand insbesondere hinsichtlich der Lagerhaltung der Schmiededorne zu verringern.The invention is therefore based on the object to reduce the costs associated with the conversion of forging devices for the production of hollow bodies with different cavity dimensions effort, in particular with regard to the storage of the forged mandrels.
Ausgehend von einer Schmiedevorrichtung der eingangs geschilderten Art löst die Erfindung die gestellte Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1. Da zufolge dieser Maßnahme für unterschiedliche Durchmesser des Hohlraums der zu fertigenden Hohlkörper ein einheitlicher Dornkern zum Einsatz kommen kann, während die für die Ausbildung der Innenkontur des Hohlkörpers maßgebenden Formflächen Dornsegmenten zugeordnet werden, die auswechselbar am Dornkern gehalten werden, ergibt sich die Möglichkeit, den jeweiligen Innendurchmessern der zu fertigenden Hohlkörper angepasste Dornsegmente einzusetzen, ohne den Dornkern ersetzen zu müssen. Diese auswechselbaren, über den Umfang des Dornkerns verteilten Dornsegmente erlauben aber nicht nur eine einfache Anpassung des Schmiededorns an unterschiedliche Abmessungen des Hohlkörpers, sondern bringen auch bessere Möglichkeiten der Werkstoffausnutzung mit sich, weil die hitzebeständigen Werkstoffe lediglich im Bereich der Dornsegmente eingesetzt zu werden brauchen.Starting from a forging device of the type described above, the invention solves the problem set by the characterizing features of
Darüber hinaus können die Dornsegmente gegenüber dem Dornkern thermisch gedämmt angeordnet werden, sodass der Dornkern von höheren thermischen Belastungen weitgehend entlastet werden kann. Außerdem ergeben sich günstige Bedingungen für eine allfällige Kühlung oder Heizung der Dornsegmente, die über im Dornkern vorgesehene Leitungen für ein Kühl- bzw. Heizmedium an entsprechende Kühl- oder Heizeinrichtung angeschlossen werden können.In addition, the mandrel segments can be thermally insulated from the mandrel core, so that the mandrel core can be largely relieved of higher thermal loads. In addition, favorable conditions for a possible cooling or heating of the mandrel segments, which can be connected via appropriate in the mandrel core lines for a cooling or heating medium to appropriate cooling or heating.
Die Halterung der Dornsegmente auf dem Dornkern kann auf unterschiedliche Weise konstruktiv gelöst werden. Eine einfache Art, die Dornsegmente ohne besonderen Arbeitsaufwand auszuwechseln, besteht darin, die Dornsegmente in hinterschnittene Nuten des Dornkerns formschlüssig einzusetzen. Dabei ist es grundsätzlich möglich, die hinterschnittenen Nuten parallel oder quer zur Dornachse anzuordnen, sodass die Dornsegmente einmal entlang ihrer Längsränder und das andere Mal stirnseitig erfasst werden.The holder of the mandrel segments on the mandrel core can be solved constructively in different ways. A simple way to replace the mandrel segments without special effort is to insert the mandrel segments in undercut grooves of the mandrel core form fit. It is basically possible to arrange the undercut grooves parallel or transverse to the mandrel axis, so that the mandrel segments are detected once along their longitudinal edges and the other times the front side.
Die hinterschnittenen Nuten können in den Dornkern eingearbeitet sein. Besonders einfache Konstruktionsbedingungen ergeben sich jedoch, wenn wenigstens eine Seitenwand der hinterschnittenen Nuten als lösbar mit dem Dornkern verbundene Profilleiste ausgebildet ist, weil in diesem Fall durch ein Lösen dieser Profilleiste die zugehörigen Dornsegmente quer zur Längsrichtung der hinterschnittenen Nut vom Dornkern abgenommen werden können.The undercut grooves may be incorporated in the mandrel core. Particularly simple construction conditions, however, arise when at least one side wall of the undercut grooves is formed as releasably connected to the mandrel core profile strip, because in this case, the associated mandrel segments can be removed transversely to the longitudinal direction of the undercut groove from the mandrel core by loosening this profile.
Um unterschiedliche Durchmesser für den Hohlkörper zu erreichen, können in ihrer radialen Erstreckung unterschiedliche Dornsegmente zum Einsatz kommen. Damit die benötigte Anzahl an unterschiedlichen Dornsegmenten klein gehalten werden kann, können die Dornsegmente über Abstandhalter am Dornkern abgestützt werden. Durch einstellbare oder auswechselbare Abstandhalter können somit die Durchmesser der Hüllkreise der Dornsegmente an die Innenabmessungen des zu fertigenden Hohlkörpers angepasst werden, ohne die Dornsegmente auswechseln zu müssen. Die Abweichungen der Formflächen der Dornsegmente vom jeweiligen Hüllkreis spielt dabei dann keine Rolle, wenn der zu fertigende Hohlkörper gegenüber dem Schmiededorn entsprechend gedreht wird.In order to achieve different diameters for the hollow body, different mandrel segments can be used in their radial extent. So that the required number of different mandrel segments can be kept small, the mandrel segments can be supported by spacers on the mandrel core. By adjustable or replaceable spacers thus the diameter of the enveloping circles of the mandrel segments can be adapted to the inner dimensions of the hollow body to be produced without having to replace the mandrel segments. The deviations of the shaping surfaces of the mandrel segments from the respective enveloping circle does not matter if the hollow body to be manufactured is rotated accordingly with respect to the forging mandrel.
Besonders einfache Bedingungen zum Umrüsten eines Schmiededorns auf unterschiedliche Innenabmessungen des zu fertigenden Hohlkörpers ergeben sich, wenn die Dornsegmente über Keilgetriebe radial verstellbar auf dem Dornkern gelagert sind. Zur Änderung des Außendurchmessers des Schmiededorns sind in diesem Fall lediglich die Keilgetriebe zu betätigen, was die zusätzliche Möglichkeit eröffnet, Hohlkörper mit sich in axialer Richtung konisch verjüngenden Hohlräumen zu fertigen, weil ja der Durchmesser des Schmiededorns während des Vorschubs des Werkstücks entsprechend kontinuierlich geändert werden kann.Particularly simple conditions for converting a forging mandrel to different inner dimensions of the hollow body to be produced arise when the mandrel segments via Wedge gear radially adjustable on the Dorn core are stored. To change the outer diameter of the forging mandrel, only the wedge gear are to be actuated in this case, which opens the additional possibility to produce hollow body with conically tapered cavities in the axial direction, because yes, the diameter of the forging mandrel during the advance of the workpiece can be changed accordingly ,
Die über den Umfang des Dornkerns verteilten Dornsegmente können auch zur Herstellung von Hohlkörpern mit längsgenuteten Hohlräumen verwendet werden. In diesem Fall bilden sowohl die Dornsegmente als auch die Umfangsabschnitte des Dornkerns zwischen den Dornsegmenten Formflächen für den Hohlraum des Hohlköpers. Voraussetzung ist allerdings, dass der Schmiededorn mit dem Werkstück mitgedreht wird. Bei in radialer Richtung kontinuierlich verstellbar auf dem Dornkern gelagerten Dornsegmenten können die durch die Dornsegmente bestimmten Nuten in der Innenwandung des Hohlkörpers auch eine sich über die Länge des Hohlkörpers ändernde Tiefe aufweisen.The mandrel segments distributed over the circumference of the mandrel core can also be used for the production of hollow bodies with longitudinally grooved cavities. In this case, both the mandrel segments and the peripheral portions of the mandrel core between the mandrel segments form molding surfaces for the cavity of the hollow body. Prerequisite, however, is that the forging mandrel is rotated with the workpiece. When the mandrel core is mounted in a continuously variable manner in the radial direction on the mandrel core, the mandrels defined by the mandrel segments in the inner wall of the hollow body can also have a depth that varies over the length of the hollow body.
In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen
- Fig. 1
- eine erfindungsgemäße Vorrichtung zum Schmieden eines Hohlkörpers ausschnittsweise im Bereich der Schmiedewerkzeuge in einem schematischen Längsschnitt,
- Fig. 2
- einen Schmiededorn in einer zum Teil aufgerissenen vereinfachten Seitenansicht,
- Fig. 3
- den
Schmiededorn 2 in einer stirnseitigen Ansicht in einem größeren Maßstab, - Fig. 4
- eine der
Fig. 2 entsprechende Darstellung einer Ausführungsvariante eines Schmiededorns, - Fig. 5
- einen Schnitt nach der Linie V-V der
Fig. 4 , - Fig. 6
- eine weitere Ausführungsform eines Schmiededorns in einer Seitenansicht,
- Fig. 7
- den Schmiededorn nach der
Fig. 6 im Schnitt nach der Linie VII-VII, - Fig. 8
- einen Schmiededorn mit radial verstellbaren Dornsegmenten in einem vereinfachten Axialschnitt und
- Fig. 9
- einen Schnitt nach der Linie IX-IX der
Fig. 8 in einem größeren Maßstab.
- Fig. 1
- a device according to the invention for forging a hollow body in sections in the region of the forging tools in a schematic longitudinal section,
- Fig. 2
- a blacksmith's horn in a partly torn simplified side view,
- Fig. 3
- the forging
mandrel 2 in a front view on a larger scale, - Fig. 4
- one of the
Fig. 2 corresponding representation of a variant of a blacksmith mandrel, - Fig. 5
- a section along the line VV the
Fig. 4 . - Fig. 6
- a further embodiment of a forging mandrel in a side view,
- Fig. 7
- the blackthorn after the
Fig. 6 in section along the line VII-VII, - Fig. 8
- a forging mandrel with radially adjustable mandrel segments in a simplified axial section and
- Fig. 9
- a section along the line IX-IX of
Fig. 8 on a larger scale.
Gemäß der
Der Schmiededorn 3 unterscheidet sich von herkömmlichen Schmiededornen, weil er aus einem Dornkern 7 und Dornsegmenten 8 aufgebaut ist, die in Abhängigkeit von der Umfangsverteilung der Schmiedewerkzeuge 2 um den Umfang des Dornkerns 7 verteilt angeordnet sind und Formflächen 9 für den Hohlraum des Hohlkörpers 1 bilden. Wie den
Nach den
Die Dornsegmente 8 können über Abstandhalter 16 am Dornkern 7 abgestützt werden. Über diese Abstandhalter 16 kann somit der Hüllkreis der Dornsegmente 8 an die jeweiligen Anforderungen angepasst werden. Die Abstandhalter 16 können außerdem zur thermischen Dämmung des Dornkerns 7 gegenüber den Dornsegmenten 8 dienen.The
Die Dornsegmente 8 können aus unterschiedlichen Werkstoffen gefertigt sein. Um nicht die gesamten Dornsegmente 8 aus einem hitzebeständigen Werkstoff herstellen zu müssen, können die Dornsegmente 8 aus einem tragenden Grundkörper 17 und einem die Formflächen 9 bildenden, hitzebeständigen Verschleißkörper 18 aufgebaut sein, wie dies beispielsweise den
In den
Die Ausführungsform des Schmiededorns 3 gemäß den
Aus der
Claims (8)
- Apparatus for forging a hollow body (1) having forging tools (2) which are arranged in a centrically symmetrical manner about a forging axis, and a forging mandrel (3) which comprises a mandrel core (7) and mandrel segments (8) which are distributed over the circumference of the mandrel core (7) and form moulding surfaces (9) for the hollow space of the hollow body (1), characterised in that the mandrel segments (8) are held on the mandrel core (7) so as to be able to be exchanged in order to be able to use mandrel segments (8) with moulding surfaces (9) for different diameters of the hollow space of the hollow body to be produced.
- Apparatus as claimed in claim 1, characterised in that the mandrel segments (8) are arranged in a thermally insulated manner in relation to the mandrel core (7).
- Apparatus as claimed in claim 1 or 2, characterised in that the mandrel segments (8) are connected to a cooling or heating device.
- Apparatus as claimed in any one of claims 1 to 3, characterised in that the mandrel segments (8) are inserted in an interlocking manner into undercut grooves (14) of the mandrel core (7).
- Apparatus as claimed in claim 4, characterised in that at least one side wall of the undercut grooves (14) is formed as a profile strip (13, 15) which is detachably connected to the mandrel core (7).
- Apparatus as claimed in any one of claims 1 to 5, characterised in that the mandrel segments (8) are supported on the mandrel core (7) via spacers (16).
- Apparatus as claimed in any one of claims 1 to 3, characterised in that the mandrel segments (8) are mounted in a radially displaceable manner on the mandrel core (7) via wedge slide gears (20).
- Apparatus as claimed in any one of claims 1 to 7, characterised in that both the mandrel segments (8) and the circumferential sections (26) of the mandrel core (7) between the mandrel segments (8) form moulding surfaces (9) for the cavity of the hollow body (1).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1171/2011A AT511748B1 (en) | 2011-08-12 | 2011-08-12 | DEVICE FOR FORGING A HOLLOW BODY |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2556906A1 EP2556906A1 (en) | 2013-02-13 |
| EP2556906B1 true EP2556906B1 (en) | 2017-06-07 |
Family
ID=46384218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12173396.8A Active EP2556906B1 (en) | 2011-08-12 | 2012-06-25 | Device for forging a hollow body |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9409226B2 (en) |
| EP (1) | EP2556906B1 (en) |
| AT (1) | AT511748B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015216965B4 (en) * | 2015-09-04 | 2018-10-25 | Sms Group Gmbh | Tool and method for forging a pipe and forming machine |
| US11122741B2 (en) * | 2018-01-30 | 2021-09-21 | Cnh Industrial America Llc | Stalk roller assembly for an agricultural system |
| CN110508691A (en) * | 2019-08-26 | 2019-11-29 | 天津中财型材有限责任公司 | A kind of steel wire mesh frame pipe end heating apparatus for shaping |
| CZ309091B6 (en) * | 2019-12-20 | 2022-01-26 | ŠKODA AUTO a.s. | Mandrel for drop forging |
| CN112139418B (en) * | 2020-09-08 | 2021-12-10 | 西安交通大学 | Four-hammer progressive radial forging device and process for inner gear ring rigid wheel of harmonic reducer |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1683573A (en) * | 1925-10-17 | 1928-09-04 | Adolph Mueller | Pipe-bending mandrel or punch |
| US1638633A (en) * | 1925-11-11 | 1927-08-09 | Heine Boiler Co | Internal mandrel for sectional boiler headers |
| US1654536A (en) * | 1925-11-11 | 1928-01-03 | Heine Boiler Co | Internal mandrel for sectional-boiler headers |
| US4131988A (en) * | 1976-10-29 | 1979-01-02 | The Globe Tool And Engineering Company | Method of manufacturing a dynamoelectric field member |
| AT347386B (en) * | 1977-07-01 | 1978-12-27 | Voest Ag | REEL, IN PARTICULAR FOR TIN STRIP |
| AT350356B (en) | 1977-08-30 | 1979-05-25 | Gfm Fertigungstechnik | FORGING THORN |
| DE2754443A1 (en) * | 1977-12-07 | 1979-06-13 | Hahn Hermann Dr Ing | Forging press for making cylindrical follow workpieces - has anvil and ram for cylindrical blank with internal expanding tools |
| CA1225328A (en) * | 1983-10-31 | 1987-08-11 | Baker Oil Tools, Inc. | Segmented concentric centralizer |
| JP2521958B2 (en) * | 1987-06-10 | 1996-08-07 | 石川島播磨重工業株式会社 | Pipe forging equipment |
| ES2104112T3 (en) * | 1993-06-14 | 1997-10-01 | Ist Nazionale Fisica Nucleare | A METHOD TO PRODUCE A HIGH FREQUENCY RESONANT CAVITY WITHOUT WELDING AND A PRODUCT OBTAINED FROM IT. |
| WO1998022237A1 (en) * | 1996-11-21 | 1998-05-28 | Grand Prix Silencers B.V. | Bending mandrel |
| DE10142179A1 (en) * | 2001-08-29 | 2003-03-20 | Sms Demag Ag | Method and device for reeling thin metal strip, in particular hot or cold rolled thin steel strip |
| WO2004079157A1 (en) * | 2003-02-28 | 2004-09-16 | Baker Hughes Incorporated | Compliant swage |
| AT501152B8 (en) * | 2003-12-30 | 2007-02-15 | Gfm Beteiligungs & Man Gmbh | METHOD AND DEVICE FOR PRODUCING A CYLINDRICAL HOLLOW BODY FROM A BOARD |
| DE102005052178B4 (en) * | 2004-10-25 | 2008-06-19 | V&M Deutschland Gmbh | Method for producing a seamless hot-worked steel tube |
| DE102007032804B3 (en) * | 2007-07-10 | 2008-09-04 | V&M Deutschland Gmbh | Forging mandrel for hot-forging of tubular work-pieces made of metal has a mandrel body made from heat-resistant material and a mandrel rod |
| WO2010019966A2 (en) * | 2008-08-15 | 2010-02-18 | Sigma-Tek, Llc | Method & system for forming composite lattice support structures |
-
2011
- 2011-08-12 AT ATA1171/2011A patent/AT511748B1/en not_active IP Right Cessation
-
2012
- 2012-06-25 EP EP12173396.8A patent/EP2556906B1/en active Active
- 2012-07-13 US US13/548,556 patent/US9409226B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| AT511748A1 (en) | 2013-02-15 |
| US9409226B2 (en) | 2016-08-09 |
| AT511748B1 (en) | 2014-04-15 |
| US20130036785A1 (en) | 2013-02-14 |
| EP2556906A1 (en) | 2013-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2210682B1 (en) | Method and apparatus for spinning | |
| DE3600681C2 (en) | ||
| EP2556906B1 (en) | Device for forging a hollow body | |
| EP2049315B1 (en) | Ejector pin for a mould and process for production of this ejector pin | |
| DE102013108604B4 (en) | Apparatus and method for producing microstructures in cylindrical surfaces | |
| EP3049200B1 (en) | Method for the hot forging of a seamless hollow body of material that is difficult to form | |
| DE102012021718B4 (en) | System and method for concurrently forming fillets in solid carbide tools | |
| DE102014003726A1 (en) | Press for producing dimensionally stable green compacts and method for manufacturing | |
| EP2064041B1 (en) | Method of producing a vulcanizing mould with a number of profile segments that can be joined together to form a circumferentially closed mould, and vulcanizing mould | |
| EP0630734A1 (en) | Method for demoulding of injection moulded hollow bodies with undercuts on the internal contour and corresponding core | |
| DE1458123B1 (en) | Process for the continuous production of several profiled strands and plant for carrying out this process | |
| EP2866960A1 (en) | Cooled tool for hot-forming and/or press-hardening of a sheet metal material and method for producing a cooling device for this tool | |
| DE102013210355B4 (en) | Cutting tool and method for producing a cutting tool | |
| EP2552614B1 (en) | Process for manufacturing wheel axles, in particular for railway carriages | |
| DE102012107375B4 (en) | Device for forging a hollow body | |
| DE4402843A1 (en) | Clearing device | |
| EP2646299B1 (en) | Pump housing, in block form, of a vehicle brake system, and method for producing the same | |
| DE2157086A1 (en) | Method and apparatus for manufacturing metal pipes by extruding a hollow blank | |
| DE2512854C3 (en) | Process for the production of twist drills or similar tools | |
| EP3284550B1 (en) | Method for producing a mould for continuous casting of metallic products, and a mould | |
| DE1138013B (en) | Method and device for the production of cylindrical workpieces with essentially longitudinal profiles | |
| EP3221068B2 (en) | Method for manufacturing a rotationally symmetrical shaped article | |
| DE102007029548B3 (en) | Tool assembly for shaping tubular workpiece outer surfaces, without material removal, allows shaping rollers to be used on the axis bolt by changing the spacer rings without altering the dimensions to reduce wear | |
| WO2008003305A1 (en) | Method for the production of a rotationally symmetrical part, and part produced according to said method | |
| DE3412486C2 (en) | Process for the production of continuous molds for continuous casting machines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| 17P | Request for examination filed |
Effective date: 20130807 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GFM - GMBH |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: B21J 13/00 20060101ALI20170206BHEP Ipc: B21J 7/14 20060101AFI20170206BHEP |
|
| INTG | Intention to grant announced |
Effective date: 20170227 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 898840 Country of ref document: AT Kind code of ref document: T Effective date: 20170615 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 6 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502012010479 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20170607 |
|
| REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170908 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170907 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170907 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20171007 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502012010479 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170630 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170625 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170630 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170625 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| 26N | No opposition filed |
Effective date: 20180308 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20170907 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20170630 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 7 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170907 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20120625 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170607 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230328 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240627 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20240611 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20240625 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20240619 Year of fee payment: 13 |