EP1063029A1 - Verfahren und Vorrichtung zum Innendruckformen eines hohlen metallischen Werkstücks - Google Patents
Verfahren und Vorrichtung zum Innendruckformen eines hohlen metallischen Werkstücks Download PDFInfo
- 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
Links
Images
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)
Abstract
Description
- 1 -
- Werkzeug
- 2 -
- Werkstück
- 3 -
- Dom an 2
- 4 -
- Übergangsabschnitt v. 2
- 5 -
- Formnest in 1
- 6 -
- Untergesenk v. 1
- 7 -
- Heizung
- 8 -
- Schließzylinder
- 9 -
- Schließzylinder
- 10 -
- Schließdorn v. 8
- 11 -
- Schließdorn v. 9
- 12 -
- Längskanal in 11
- 13 -
- Zuleitung zu 12
- 14 -
- Druckfluid
- 15 -
- Regelventil
- 16 -
- Druckanzeige
- 17 -
- Enden v. 2
- 18 -
- Gegenhaltestößel
- 19 -
- hydr. Zylinder
Claims (11)
- Verfahren zum Innendruckumformen eines offene Enden (17) aufweisenden hohlen metallischen Werkstücks (2) in einem Formnest (5) eines mehrteiligen Werkzeugs (1), bei welchem das Werkstück (2) in das vorab aufgeheizte offene Werkzeug (1) gelegt und danach in seine Enden (17) Bestandteile von Schließzylindern (8, 9) bildende Schließdorne (10, 11) dichtend eingeführt werden sowie das Werkzeug (1) geschlossen wird, worauf über mindestens einen Schließdorn (11) ein erwärmtes Druckfluid (14) in das nun warme plastifizierte Werkstück (2) eingeleitet und unter dem Einfluss des Druckfluids (14) der Werkstoff des Werkstücks (2) in das Formnest (5) im Werkzeug (1) gepresst wird.
- Verfahren nach Anspruch 1, bei welchem das Werkstück (2) vor dem Einbringen in das Werkzeug (1) erwärmt wird.
- Verfahren nach Anspruch 1 oder 2, bei welchem das Werkstück (2) extern in einem Ofen erwärmt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, bei welchem beim Einleiten des Druckfluids (14) mindestens ein Schließdorn (11) in das Werkstück (2) verlagert wird.
- Verfahren nach einem der Ansprüche 1 bis 4, bei welchem als Druckfluid (14) Stickstoff verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 4, bei welchem als Druckfluid (14) Luft verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 6, bei welchem die Umformung des Werkstücks (2) in einem Temperaturbereich zwischen 200 °C und 400 °C bei einem Druck zwischen 150 bar und 500 bar durchgeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 7, bei welchem die Umformung des Werkstücks (2) in einem Temperaturbereich zwischen 250 °C und 350 °C bei einem Druck zwischen 180 bar und 250 bar durchgeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 8, bei welchem ein Werkstück (2) aus Aluminium oder aus einer Aluminiumlegierung umgeformt wird.
- Vorrichtung zum Innendruckumformen eines offene Enden (17) aufweisenden hohlen metallischen Werkstücks (2), welche ein mehrteiliges Werkzeug (1) mit einem Formnest (5) für das Werkstück (2) und mit in die Enden (17) verfahrbaren Schließdornen (10, 11) als Bestandteile von hydraulisch beaufschlagbaren Schließzylindern (8, 9) umfasst, wobei das Werkzeug (1) mindestens hinsichtlich des Formnests (5) beheizbar ist, und bei welcher über mindestens einen Schließdorn (11) ein erwärmtes Druckfluid (14) in das gegebenenfalls vorab erwärmte Werkstück (2) einführbar ist.
- Vorrichtung nach Anspruch 10, bei welcher das Werkzeug (1) mit einer kapazitiven oder induktiven elektrischen Heizung (7) versehen ist.
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 (de) | 2000-12-27 |
EP1063029B1 EP1063029B1 (de) | 2004-11-10 |
Family
ID=26053906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00109465A Expired - Lifetime EP1063029B1 (de) | 1999-06-24 | 2000-05-04 | Verfahren zum Innendruckformen eines hohlen metallischen Werkstücks |
Country Status (3)
Country | Link |
---|---|
US (1) | US6349583B1 (de) |
EP (1) | EP1063029B1 (de) |
DE (1) | DE19928873B4 (de) |
Cited By (4)
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 (de) * | 2001-12-19 | 2003-06-25 | Bayerische Motoren Werke Aktiengesellschaft | Umformpresse |
WO2018010978A1 (en) * | 2016-07-11 | 2018-01-18 | Sapa 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 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6322645B1 (en) * | 1999-09-24 | 2001-11-27 | William C. Dykstra | Method of forming a tubular blank into a structural component and die therefor |
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 |
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 |
US8899085B2 (en) | 2011-12-30 | 2014-12-02 | The Coca-Cola Company | System and method for forming a metal beverage container using blow molding |
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 |
JP6420828B2 (ja) * | 2013-06-14 | 2018-11-07 | ザ コカ・コーラ カンパニーThe Coca‐Cola Company | マルチブロー成形された金属コンテナ |
WO2015143540A1 (en) | 2014-03-25 | 2015-10-01 | Betty Jean Pilon | Method for blow molding metal containers |
JP7097182B2 (ja) | 2014-12-30 | 2022-07-07 | モンテベロ テクノロジー サービシズ リミテッド | 衝撃押出し加工法、工具および製品 |
Citations (3)
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 (en) * | 1997-05-30 | 1998-12-03 | Accra Teknik Ab | Method for manufacturing quenched thin-walled metal hollow casing by blow-moulding |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5640652B2 (de) * | 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 |
US5649439A (en) * | 1994-04-15 | 1997-07-22 | The Boeing Co. | Tool for sealing superplastic tube |
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 | 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 |
-
1999
- 1999-06-24 DE DE19928873A patent/DE19928873B4/de not_active Expired - Fee Related
-
2000
- 2000-05-04 EP EP00109465A patent/EP1063029B1/de not_active Expired - Lifetime
- 2000-08-29 US US09/651,349 patent/US6349583B1/en not_active Expired - Lifetime
Patent Citations (3)
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 (en) * | 1997-05-30 | 1998-12-03 | Accra Teknik Ab | Method for manufacturing quenched thin-walled metal hollow casing by blow-moulding |
Cited By (7)
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 (de) * | 2001-12-19 | 2003-06-25 | Bayerische Motoren Werke Aktiengesellschaft | Umformpresse |
EP1321203B1 (de) * | 2001-12-19 | 2007-08-01 | Bayerische Motoren Werke Aktiengesellschaft | Umformpresse |
WO2018010978A1 (en) * | 2016-07-11 | 2018-01-18 | Sapa As | Hot metal gas formed roof rail and method of manufacture thereof |
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 |
---|---|
EP1063029B1 (de) | 2004-11-10 |
DE19928873B4 (de) | 2004-08-12 |
US6349583B1 (en) | 2002-02-26 |
DE19928873A1 (de) | 2001-01-04 |
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Inventor name: DIPL.-ING. JUERGEN KLEINSCHMIDT, Inventor name: DR.-ING. TOEPKER DIETER, Inventor name: DIPL.-ING. GRUSSMANN ELMAR, Inventor name: DR.-ING. FRITZ ANDREAS |
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