EP1063029A1 - Procédé et dispositif d'hydroformage d'une pièce creuse - Google Patents

Procédé et dispositif d'hydroformage d'une pièce creuse Download PDF

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Publication number
EP1063029A1
EP1063029A1 EP00109465A EP00109465A EP1063029A1 EP 1063029 A1 EP1063029 A1 EP 1063029A1 EP 00109465 A EP00109465 A EP 00109465A EP 00109465 A EP00109465 A EP 00109465A EP 1063029 A1 EP1063029 A1 EP 1063029A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
tool
forming
pressure fluid
heated
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.)
Granted
Application number
EP00109465A
Other languages
German (de)
English (en)
Other versions
EP1063029B1 (fr
Inventor
Dipl.-Ing. Jürgen Kleinschmidt
Dr.-Ing. Töpker Dieter
Dipl.-Ing. Grussmann Elmar
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP1063029A1 publication Critical patent/EP1063029A1/fr
Application granted granted Critical
Publication of EP1063029B1 publication Critical patent/EP1063029B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the method of internal pressure forming of hollow ones, in particular tubular, workpieces within a closed Tool is both with the material steel also known for non-ferrous metals. That in the workpieces
  • the pressure fluid introduced consists of water or a water emulsion. Forming the workpiece takes place at room temperature.
  • hot sand is known to insert into a workpiece and to shape it. Here, both the workpiece and also warmed the tool. During the forming process, the Maintain tool and workpiece temperature.
  • the invention is based on the prior art Task based on a method and an apparatus for Internal pressure forming of a hollow metallic workpiece to create those with low internal pressures and forming forces with significantly reduced constructive High internal and external surface quality can be achieved.
  • the invention has recognized that by heating the workpiece to be formed and heating of the tool a significant increase in the shape change of the Workpiece while significantly reducing the Forming forces are recorded. Here the temperatures appropriately adjusted so that over the entire Mold cavity seen in the tool a uniform temperature profile is ensured. Another advantage The invention is seen in that both the locking forces for the tool as well as the closing forces the ends of the workpiece can be significantly reduced. Also can make the tool much simpler overall become.
  • the heating of the pressure fluid can be outside the tool respectively. As a rule, however, the tool heating is sufficient, to the pressure fluid to the necessary operating temperature bring if the pressurized fluid has appropriate Channels in the tool is directed into the workpiece.
  • the workpiece can be heated in various ways be performed. However, according to claim, is advantageous 3 that the workpiece in an oven externally on the necessary temperature is brought.
  • the forming process can be carried out in a pure There is a widening of a workpiece in the closed tool or according to claim 4 with an additional publisher be coupled to at least one locking pin.
  • This Method is particularly useful in complex configurations applied, e.g. then, if one in the course of the workpiece lateral shape in the form of a so-called dome should be and material has to be replenished.
  • a weakly reactive fluid Oil can be used, according to the invention be more expedient a gaseous pressure fluid, its chemical Composition is matched so that no oxidation takes place on the inner surface of the workpiece.
  • nitrogen as a pressure fluid as particularly economical Viewed variant. Nitrogen does not chemical changes in the material of the workpiece and does not adhere to the inner surface of the workpiece.
  • the pressurized fluid allows nitrogen namely in the form of a pure nitrogen, the become inert at the temperature in question behaves, a particularly advantageous application.
  • a mixed gas of nitrogen and Argon or helium are used.
  • the desired plasticity of the workpiece to reduce both the internal pressure in the workpiece and the forming forces is according to claim 7 in a temperature range reached between 200 ° C and 400 ° C. In this temperature range internal pressures of a magnitude are sufficient from 150 bar to 500 bar. Higher internal pressures come in this area then apply when the to be reshaped Workpieces e.g. have greater wall thicknesses.
  • the forming of the workpiece is preferred in a temperature range between 250 ° C and 350 ° C (Claim 8). Then move the preferred internal pressures between 180 bar and 250 bar.
  • a workpiece made of aluminum or is formed from an aluminum alloy At Aluminum takes away its ability to change shape increasing temperature to a certain degree, before recrystallization begins. At the same time it drops the plasticity limit to a lower stress value from.
  • an intermediate glow at a workpiece made of aluminum especially if a workpiece that has already been at least partially formed to be further deformed, can be completely eliminated. It is not a behavior of several hours after a pre-forming to annealing temperature required to get the material back to bring it back into a plastifiable state.
  • the required forming forces can be be lowered so far that not only simple Locking mechanisms for the tool and for locking of the ends of the workpiece are sufficient, also overall can make the tool much simpler become.
  • Internal tests have shown that the locking forces of the tool compared to the previous one high pressures and room temperatures can be reduced by more than half. The reason is the comparatively low internal pressure around which there is virtually plastic material of the workpiece to reshape according to the given mold nest.
  • the implementation can also be more complex Contours on a preformed hollow metallic workpiece, in particular made of aluminum or an aluminum alloy, the axial pushing forces then required over the locking pins at the ends of the workpiece be significantly reduced.
  • the pressurized fluid can be pure nitrogen. Is conceivable also a mixed gas of nitrogen and argon or helium. Furthermore, it is conceivable that the pressure fluid from air is formed.
  • the heating of the tool can be done in different ways and Way. Electric heating should be an advantage his.
  • the tool is preferred according to claim 11 with a capacitive or inductive electric heater Mistake.
  • the invention is based on one in the drawing illustrated embodiment explained in more detail.
  • FIG. 1 is a schematically illustrated tool for Internal pressure forming of a hollow metallic workpiece 2, in particular an aluminum tube made of AlMg3.
  • the S-shaped preformed workpiece 2 should be in the tool 1 its final S-shaped contour with a side Dome 3 preserved in the middle transition section 4.
  • the tool 1 is in the lower die 6 shown as well as in the upper die, not shown a heater 7 provided in the embodiment is illustrated as an electric heating coil.
  • the tool 1 are on both end faces of the workpiece 2 hydraulically actuated locking cylinders 8, 9 with axially displaceable locking pins 10, 11 assigned. Of these locking pins 10, 11, the locking pin 11 with a longitudinal channel 12 to which a feed line 13 for supplying one consisting of pure nitrogen Pressure fluid 14 is connected. The feed line 13 is guided via a control valve 15 with pressure indicator 16.
  • Both locking pins 10, 11 serve to seal the ends 17 of the workpiece 2 and the introduction of axial pushing forces, if necessary for the formation of the cathedral 3 are.
  • the tool 1 is still on Counter plunger 18 as part of a hydraulically actuated Cylinder 19 assigned.
  • the workpiece 2 thus preheated is then in the Form nest 5 placed and then the closing mandrels 10, 11 sealing into the ends 17 of the workpiece 2 retracted.
  • the tool 1 can simultaneously with the Retracting the locking pins 10, 11 in the ends 17 closed or it can be closed beforehand.
  • the pressure fluid is via the feed line 13 14 pressure-controlled inserted into the workpiece 2 and thereby his plasticized material in the mold cavity 5 pressed.
  • the internal pressure required here can be controlled via the control valve 15 flawlessly depending on the particular Warm-up temperature of workpiece 2 and the heating temperature of the tool 1 can be controlled.
  • the pressure fluid 14 can be fed to the closing mandrel 11 are heated. However, since the closing mandrel 11 also the tool 1 is also heated, which then suffices from Tool 1 on the locking pin 11 and from the locking pin 11 heat transferred to the pressure fluid 14 in the longitudinal channel 12, around the temperature level of workpiece 2 and tool 1 adjust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP00109465A 1999-06-24 2000-05-04 Procédé d'hydroformage d'une pièce creuse Expired - Lifetime EP1063029B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928873 1999-06-24
DE19928873A DE19928873B4 (de) 1999-06-24 1999-06-24 Verfahren und Vorrichtung zum Innendruckformen eines hohlen metallischen Werkstücks aus Aluminium oder einer Aluminiumlegierung
US09/651,349 US6349583B1 (en) 1999-06-24 2000-08-29 Method and device for forming a hollow metallic workpiece by inner pressure

Publications (2)

Publication Number Publication Date
EP1063029A1 true EP1063029A1 (fr) 2000-12-27
EP1063029B1 EP1063029B1 (fr) 2004-11-10

Family

ID=26053906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109465A Expired - Lifetime EP1063029B1 (fr) 1999-06-24 2000-05-04 Procédé d'hydroformage d'une pièce creuse

Country Status (3)

Country Link
US (1) US6349583B1 (fr)
EP (1) EP1063029B1 (fr)
DE (1) DE19928873B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003035299A1 (fr) * 2001-10-24 2003-05-01 Honda Giken Kogyo Kabushiki Kaisha Procede de formage d'un element tubulaire
EP1321203A2 (fr) * 2001-12-19 2003-06-25 Bayerische Motoren Werke Aktiengesellschaft Presse de formage
WO2018010978A1 (fr) * 2016-07-11 2018-01-18 Sapa As Rail de toit formé par formage à gaz de métal chaud et son procédé de fabrication
US10737308B2 (en) 2016-09-19 2020-08-11 Zapadoceska Univerzita V Plzni Method of producing hollow objects and an arrangement for such method

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7024897B2 (en) * 1999-09-24 2006-04-11 Hot Metal Gas Forming Intellectual Property, Inc. Method of forming a tubular blank into a structural component and die therefor
US6322645B1 (en) * 1999-09-24 2001-11-27 William C. Dykstra Method of forming a tubular blank into a structural component and die therefor
US6701764B2 (en) * 2001-09-27 2004-03-09 Siemens Westinghouse Power Corporation Method of expanding an intermediate portion of a tube using an outward radial force
KR20040031175A (ko) * 2002-10-04 2004-04-13 주식회사 성우하이텍 알루미늄 합금의 온간 액압 성형 방법 및 그 장치
US7266982B1 (en) 2005-06-10 2007-09-11 Guza David E Hydroforming device and method
US20070128443A1 (en) * 2005-10-13 2007-06-07 Hoggan Steven C Method for altering the shape of a tube
US8448487B2 (en) * 2008-10-16 2013-05-28 The Coca-Cola Company Vessel forming station
EP2797702B1 (fr) 2011-12-30 2020-03-18 The Coca-Cola Company Système et procédé de formation d'un contenant métallique pour boisson par moulage par soufflage
CN102641937B (zh) * 2012-02-29 2014-08-27 佛山市顺德区燉煌五金塑料实业有限公司 带支撑模的y型三通成型设备
WO2014201473A2 (fr) * 2013-06-14 2014-12-18 The Coca-Cola Company Applications liées à un contenant métallique moulé par multiples soufflages
EP3126533B1 (fr) 2014-03-25 2023-05-03 Montebello Technology Services Ltd. Procédé de moulage par soufflage de récipients métalliques
CA2972280C (fr) 2014-12-30 2022-08-30 1949467 Ontario Inc. Procede d'extrusion par percussion, outillage et produit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437326A (en) * 1982-06-07 1984-03-20 Carlson Arne H Bulge forming method and apparatus
DE19642824A1 (de) * 1996-10-17 1998-04-23 Hermann Bartels Verfahren und Vorrichtung zum Verformen von Hohlprofil-Werkstücken aus Metall
WO1998054370A1 (fr) * 1997-05-30 1998-12-03 Accra Teknik Ab Procede de production d'un corps creux a parois minces en acier trempe par moulage par soufflage

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JPS5640652B2 (fr) * 1973-10-02 1981-09-22
DE2941972A1 (de) * 1979-10-17 1981-04-30 Thyssen Industrie Ag, 4300 Essen Verfahren zur herstellung von hohlen metallkoerpern
DE3543523A1 (de) * 1985-12-10 1987-06-11 Messerschmitt Boelkow Blohm Verfahren zum herstellen von behaeltern durch superplastisches verformen
US5214948A (en) * 1991-12-18 1993-06-01 The Boeing Company Forming metal parts using superplastic metal alloys and axial compression
US5988225A (en) * 1994-04-15 1999-11-23 The Boeing Company Superplastic tubular part
DE19530056B4 (de) * 1995-08-16 2004-09-09 Schuler Hydroforming Gmbh & Co. Kg Verfahren und Vorrichtung zum Herstellen T-förmiger bzw. mindestens eine domartige Abzweigung aufweisender Hohlkörper
DE29601019U1 (de) * 1996-01-22 1997-05-22 Bartels, Hermann A., 63165 Mühlheim Vorrichtung zum Verformen von Hohlprofil-Werkstücken
US5992197A (en) * 1997-03-28 1999-11-30 The Budd Company Forming technique using discrete heating zones
GB9727063D0 (en) * 1997-12-23 1998-02-18 Gkn Sankey Ltd A hydroforming process
US5960658A (en) * 1998-02-13 1999-10-05 Jac Products, Inc. Method of blow molding
FR2787357B1 (fr) * 1998-12-18 2001-03-16 Tubes Et Formes Procede et dispositif de realisation par hydroformage d'un piquage incline a partir d'un tube metallique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437326A (en) * 1982-06-07 1984-03-20 Carlson Arne H Bulge forming method and apparatus
DE19642824A1 (de) * 1996-10-17 1998-04-23 Hermann Bartels Verfahren und Vorrichtung zum Verformen von Hohlprofil-Werkstücken aus Metall
WO1998054370A1 (fr) * 1997-05-30 1998-12-03 Accra Teknik Ab Procede de production d'un corps creux a parois minces en acier trempe par moulage par soufflage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003035299A1 (fr) * 2001-10-24 2003-05-01 Honda Giken Kogyo Kabushiki Kaisha Procede de formage d'un element tubulaire
US7464572B2 (en) 2001-10-24 2008-12-16 Honda Giken Kogyo Kabushiki Kaisha Process for forming tubular member
EP1321203A2 (fr) * 2001-12-19 2003-06-25 Bayerische Motoren Werke Aktiengesellschaft Presse de formage
EP1321203B1 (fr) * 2001-12-19 2007-08-01 Bayerische Motoren Werke Aktiengesellschaft Presse de formage
WO2018010978A1 (fr) * 2016-07-11 2018-01-18 Sapa As Rail de toit formé par formage à gaz de métal chaud et son procédé de fabrication
US11389851B2 (en) 2016-07-11 2022-07-19 Hydro Extruded Solutions As Hot metal gas formed roof rail and method of manufacture thereof
US10737308B2 (en) 2016-09-19 2020-08-11 Zapadoceska Univerzita V Plzni Method of producing hollow objects and an arrangement for such method

Also Published As

Publication number Publication date
DE19928873A1 (de) 2001-01-04
EP1063029B1 (fr) 2004-11-10
US6349583B1 (en) 2002-02-26
DE19928873B4 (de) 2004-08-12

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