EP0490756B1 - Verfahren zur Herstellung eines aus einem bei Umgebungstemperatur nicht-schmiedbaren Material bestehenden Teiles, und entsprechendes Werkzeug - Google Patents

Verfahren zur Herstellung eines aus einem bei Umgebungstemperatur nicht-schmiedbaren Material bestehenden Teiles, und entsprechendes Werkzeug Download PDF

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Publication number
EP0490756B1
EP0490756B1 EP91403341A EP91403341A EP0490756B1 EP 0490756 B1 EP0490756 B1 EP 0490756B1 EP 91403341 A EP91403341 A EP 91403341A EP 91403341 A EP91403341 A EP 91403341A EP 0490756 B1 EP0490756 B1 EP 0490756B1
Authority
EP
European Patent Office
Prior art keywords
temperature
chuck
mandrel
heating
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91403341A
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English (en)
French (fr)
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EP0490756A1 (de
Inventor
Gérard Duquesnoy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Group SAS
Original Assignee
Airbus Group SAS
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Filing date
Publication date
Application filed by Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0490756A1 publication Critical patent/EP0490756A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the flow forming technique consists in placing a workpiece blank on a rotating mandrel and causing plastic deformation of this blank by lengthening and reducing its thickness, by means of one or more knobs exerting high pressure on the room.
  • the flow-forming tool therefore mainly comprises a mandrel, generally two or three knurling wheels and means making it possible to secure the part blank of the mandrel in rotation.
  • this result is obtained by means of a method of manufacturing by hot-spinning a part made of a material which is not malleable at room temperature, consisting in placing a blank of part on a heating mandrel, then in spinning this blank while heating the mandrel to a temperature for which said material becomes malleable, this temperature being regulated by regulating means rotating with the mandrel, and substantially equal to the difference between a temperature allowing the formation of said material and a heating temperature of this material under the effect of flow spinning.
  • the regulation of the heating temperature of the mandrel by regulation means which rotate with the latter makes it possible to ensure a particularly precise regulation of this temperature (for example, more or less 5 ° C.).
  • the housing is fixed at one end of the mandrel, interchangeably, by means removable fasteners.
  • cooling means In order to prevent excessive heating of the temperature control means causing the temperature to drift, it is recommended to place cooling means in the casing, near the temperature control means, and to form cooling holes. in the casing opposite these temperature regulation means.
  • the reference 10 designates a rotary spindle of a flow-forming machine of conventional design, rotating in a fixed headstock 12.
  • the machine also conventionally comprises a tailstock 14 mounted in a movable headstock 16 and axially aligned with the spindle 10.
  • the movable headstock 16 can be moved away from and in proximity to the fixed headstock 12 on a bench (not shown) carrying the latter.
  • the machine further includes a wheel-holder carriage 18, generally equipped with two to three wheels 20 and able to move parallel to the axis of the spindle 10 at a constant and adjustable speed.
  • the reference 22 generally designates a tool making it possible to manufacture by hot flow spinning a part made of a material which is not or is not very malleable at ambient temperature.
  • This tool which generally has the shape of a cylinder of revolution, is fixed to the spindle 10, coaxial with the latter, so as to be driven in rotation by this spindle.
  • the tool 22 comprises a heating mandrel 24, the external shape of which defines the internal shape of the part to be produced, and a temperature regulation assembly 26, on which the mandrel 24 is mounted interchangeably, by example with screws 28.
  • the regulating block 26 comprises a cylindrical outer protective casing 30.
  • One end of this casing 30, intended to be fixed to the spindle 10, comprises a flange 30a traversed along its axis by a bore whose conical outer portion 31 is provided for come to fit on a centering cone 10a formed at the end of the spindle 10.
  • the flange 30a is fixed on the end of the spindle 10, for example by means of studs 32.
  • the casing 30 is closed by a cover constituted by two plates 34 and 36 between which is placed a thermally insulating material 38. These three elements are joined together, for example by means of pins 40, and they are fixed at the end of the casing 30, for example by screws 42.
  • the mandrel 24 comprises a tube exterior 44, made of a metal such as steel having a high hardness at the forming temperature.
  • this outer tube 44 serves as a counterform for the part to be produced. Consequently, the shape and the external dimensions of this tube 44 are modified each time that a different part is to be produced.
  • the outer tube 44 has a flange allowing it to be fixed, by means of screws 28, to the cover formed by the plates 34 and 36 and the insulating material 38.
  • a centering cone formed on the outer face of the plate 36 facing outwards from the block 26 penetrates into a complementary frustoconical surface formed at the adjacent end of the outer tube 44, so as to automatically ensure the axial alignment of the mandrel 24 on the regulating block 26 when the mandrel is fixed on the latter.
  • the removable nature of the mandrel 24 relative to the regulating block 26 makes it possible not to modify the latter when the shape and / or dimensions of the part vary. Indeed, it then suffices to disassemble the mandrel 24 used previously and to set up a new mandrel having a different shape and external dimensions.
  • the outer tube 44 is closed by an end piece 50 on which the tubular diffuser 48 can in particular be fixed.
  • a longitudinal groove formed on the outer surface of the tubular diffuser 48 also makes it possible to house a thermocouple 52 used to measure with precision the temperature of the useful part of the outer tube 44 of the mandrel.
  • the temperature to which the mandrel 24 is heated corresponds to the difference between the forming temperature of the material constituting the blank part and the heating temperature of this material resulting from the flow spinning.
  • the mandrel 24 will be heated to approximately 450 ° C., taking into account the fact that the rise in temperature due to the flow forming proper is close in this case 250 ° C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (7)

  1. Verfahren zur Herstellung eines Werkstücks durch Warmfließformen aus einem bei Umgebungstemperatur nicht warmverformbarem Material, wobei der Rohling eines Werkstücks auf einen beheizbaren Dorn (24) plaziert wird, dann dieser Rohling warmfließverformt wird indem der Dorn auf eine Temperatur erwärmt wird, bei der das Material warmverformbar wird, dadurch gekennzeichnet, daß diese Temperatur durch sich zusammen mit dem Dorn drehende Regelmittel (66) reguliert wird und im wesentlichen gleich der Differenz ist zwischen einer Temperatur, die das Verformen dieses Materials erlaubt und einer Temperatur, um die sich das Material unter dem Einfluß des warmfließverformens erwärmt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß es angewandt wird zur Herstellung eines Werkstücks aus Titanlegierung und daß man den Dorn (24) auf eine Temperatur zwischen ca. 400° C und ca. 500° C erwärmt.
  3. Werkzeug zur Herstellung eines Werkstücks durch Warmfließformen aus einem bei Umgebungstemperatur nicht warmverformbaren Material, mit einem Dorn (24), der in seinem Inneren Heizmittel (46) besitzt, dadurch gekennzeichnet, daß dieses Werkzeug Mittel (66) zur Regulierung der Temperatur der Heizmittel (46) besitzt, die in einem Gehäuse (30) angeordnet sind, das an einem Ende des Dorns (24) befestigt ist, sowie ein thermisch isolierendes Element (38) zwischen dem Dorn (24) und dem Gehäuse (30).
  4. Werkzeug nach Anspruch 3, dadurch gekennzeichnet, daß der Dorn (24) aus einem Rohr (44) besteht, dessen Innenfläche auf seiner ganzen Nutzlänge in Kontakt steht mit einem Wärmeverteiler (48), wobei die Heizmittel (46) im Inneren des Verteilers angebracht sind.
  5. Werkzeug nach einem der Ansprüche 3 und 4, dadurch ge kennzeichnet, daß die Heizmittel mindestens einen elektrischen Widerstand (46) enthalten, der elektrisch mit den Temperaturregelmitteln (66) verbunden ist, wobei letztere von einer externen Stromquelle (70) über einen vom Gehäuse (30) getragenen Kollektur und feste Kohlebürsten (72) versorgt werden.
  6. Werkzeug nach einem der Ansprüche 3 bis 5, dadurch ge kennzeichnet, daß der Dorn (24) mit demontierbaren Befestigungsmitteln (42) austauschbar am Gehäuse (30) befestigt ist.
  7. Werkzeug nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß Kühlmittel (82) im Gehäuse (30) in der Nähe der Temperaturregelmittel (66) angebracht sind und daß außerdem im Gehäuse gegenüber diesen Temperaturregelmitteln Kühllöcher (86) vorhanden sind.
EP91403341A 1990-12-12 1991-12-10 Verfahren zur Herstellung eines aus einem bei Umgebungstemperatur nicht-schmiedbaren Material bestehenden Teiles, und entsprechendes Werkzeug Expired - Lifetime EP0490756B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015570A FR2670409B1 (fr) 1990-12-12 1990-12-12 Procede de fabrication par fluotournage a chaud d'une piece en un materiau non malleable a temperature ambiante et outillage correspondant.
FR9015570 1990-12-12

Publications (2)

Publication Number Publication Date
EP0490756A1 EP0490756A1 (de) 1992-06-17
EP0490756B1 true EP0490756B1 (de) 1994-06-15

Family

ID=9403164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91403341A Expired - Lifetime EP0490756B1 (de) 1990-12-12 1991-12-10 Verfahren zur Herstellung eines aus einem bei Umgebungstemperatur nicht-schmiedbaren Material bestehenden Teiles, und entsprechendes Werkzeug

Country Status (5)

Country Link
EP (1) EP0490756B1 (de)
AT (1) ATE107207T1 (de)
DE (1) DE69102522T2 (de)
ES (1) ES2056606T3 (de)
FR (1) FR2670409B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025072B4 (de) * 2007-05-30 2008-04-24 Leifeld Metal Spinning Gmbh Werkzeugmaschine und Verfahren zum Bearbeiten eines Werkstücks

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425033C2 (de) * 1994-07-15 1999-07-29 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum Drückumformen von Werkstücken
CN104249116B (zh) * 2013-06-27 2017-06-09 上海新力动力设备研究所 热旋压芯模内加热装置
CN108555103A (zh) * 2018-01-09 2018-09-21 南京航空航天大学 协同自阻电加热的板材自增量旋压成形装置及方法
CN108246902B (zh) * 2018-01-09 2023-09-19 南京航空航天大学 含钛层状复合管自增量旋压热力耦合同步成形装置及方法
DE102021123111A1 (de) 2021-09-07 2023-03-09 Westdeutscher Metall-Handel GmbH Fließformwerkzeug zum Fließformen eines Werkstücks sowie Verfahren zum Fließformen eines Werkstücks

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR994560A (fr) * 1949-07-08 1951-11-19 Procédé et dispositifs pour le repoussage au tour
DE2148519A1 (de) * 1971-09-29 1973-04-05 Ottensener Eisenwerk Gmbh Verfahren und vorrichtung zum erwaermen und boerdeln von ronden
FR2389428A1 (en) * 1977-05-02 1978-12-01 France Etat Spin forming method for conical shell parts - uses one forming roller with compensator ring on flanged support to resist unbalanced forces
EP0081700A1 (de) * 1981-11-20 1983-06-22 Air Products And Chemicals, Inc. Drückformung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025072B4 (de) * 2007-05-30 2008-04-24 Leifeld Metal Spinning Gmbh Werkzeugmaschine und Verfahren zum Bearbeiten eines Werkstücks

Also Published As

Publication number Publication date
DE69102522T2 (de) 1994-11-10
ATE107207T1 (de) 1994-07-15
FR2670409B1 (fr) 1995-02-24
FR2670409A1 (fr) 1992-06-19
EP0490756A1 (de) 1992-06-17
ES2056606T3 (es) 1994-10-01
DE69102522D1 (de) 1994-07-21

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