EP1000677B1 - Verfahren zur Herstellung eines Bauteils mittels Innenhochdruck-Umformen - Google Patents
Verfahren zur Herstellung eines Bauteils mittels Innenhochdruck-Umformen Download PDFInfo
- Publication number
- EP1000677B1 EP1000677B1 EP99120812A EP99120812A EP1000677B1 EP 1000677 B1 EP1000677 B1 EP 1000677B1 EP 99120812 A EP99120812 A EP 99120812A EP 99120812 A EP99120812 A EP 99120812A EP 1000677 B1 EP1000677 B1 EP 1000677B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- section
- wall thickness
- sections
- inner tube
- 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
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
- 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
- B21D26/051—Deforming double-walled bodies
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
Definitions
- the present invention relates to a method for producing a component by means of Hydroforming from a tube with at least one section different wall thickness.
- the present invention also relates to such a tube.
- IHU hydroforming process
- DE 196 04 357 A1 describes a method for producing pipes with sections different wall thickness known from an initially flat sheet, in which first a targeted rolling deformation of the sheet in the rolling direction changing sheet thicknesses in certain areas. This results in one targeted partial wall thickness reduction. Then the rolled sheet cut, formed into a tube and joined along the butt edges. A such manufacturing with continuous material in a manufacturing process, however complex and costly.
- DE 3610 481 A1 describes a further method for producing pipes with a or several inner wall thickenings known, the thickenings from one cylindrical tube manufactured by cutting processes and / or forming processes are.
- the first step is: Machining processes or forming processes externally or externally and internally molded wall thickenings, which are preferably produced in a second step Cold hammers are formed or shaped inwards. This is also the case is a comparatively complex and costly process.
- EP 0 733 540 B1 describes a method for producing a hollow profile for a Carrier structure of a motor vehicle by hydraulic expansion of a Output part, an extruded profile being used as the output part, which in Cross-section areas with different wall thicknesses.
- the wall thickness of the The starting part is chosen so that the hydroforming process manufactured hollow profile has the necessary wall thickness at the required points.
- the disadvantage of this is that for different hollow profiles with different wall thicknesses separate extruded profiles must be produced as the starting product each time.
- the object of the present invention is therefore a method of the above Provide mentioned type, in which the wall thickness gradation with a paragraph-free outer contour can be reached in the simplest possible way.
- the object of the invention is also a tube produced by said method
- the solution is to first use a composite pipe by using an inner tube with a uniform wall thickness to generate the minimum a section of different wall thickness at least one outer pipe section is pushed on and then the assembled pipe High pressure forming process is subjected, so that the parts through the Shaping process are firmly connected to each other, according to the invention at least one end of an outer tube section is designed obliquely in cross section is, so that after the hydroforming process a substantially paragraph-free outer contour of the finished component results.
- the outer contour then does not need any Post-processing to grind off any paragraphs or joints or in comparable postprocessing.
- one or more can additional connections between the inner tube and the at least one outer Pipe section are produced, for example by laser welding or others Joining techniques. This ensures that the composite semi-finished product in the IHU tool does not slip.
- These additional connections can, for example, after the forming process are produced in that the resulting component with a or several other components is connected.
- a composite tube 10 which consists of an inner tube 11 and an outer tube section 12.
- the inner tube 11 has the required component length.
- the outer tube section 12 is in the manner of a sleeve completely pushed over the inner tube 11 so that it has a central region 11b covered and the outer areas 11a remain uncovered.
- On the outer edges 13 and 14 of the outer tube section 12 are bevels extending inwards 15, 16 provided.
- the inner tube 11 and the outer tube section 12 consist for example of a Sheet steel, which is formed into a tube and joined at the butt edges.
- the Assembled tube 10 is a hydroforming process in the usual way subjected.
- the resulting component 20 is schematic in FIG. 1b shown.
- the component 20 consists of outer regions 21, which consist of the Inner tube 11 emerged and correspond to the area 11a designated in FIG. 1a and a thickened region 22, which consists of the region designated by 11b in FIG. 1a of the inner tube and the outer tube section 12 emerged.
- the outer contour of the Component 20 has no shoulders, since the wall of the former inner tube perfectly to the oblique contour 15, 16 of the outer tube section 12 nestled.
- connection points e.g. B. can be further solidified by laser welding or by other joining techniques.
- This Connection points can be made before or after the forming process. There then the connection points made after the forming process, they can are generated that the component 20 with one or more any other Components is connected.
- FIG. 2a shows a further exemplary embodiment of a composite tube 30 shown schematically and partially cut.
- the composite pipe 30 consists of an inner tube 31 and three outer tube sections 32, 33, 34, which are partially are pushed over each other on the inner tube 31, so that an outer region 31a of the Inner tube 31 and the outer free ends 32a, 33a, 33b of the outer tube sections 32, 33, 34 remain uncovered.
- the outer free ends 32a 33a and 34a of the outer Pipe sections 32, 33, 34 in turn have an inward bevel 32b, 33b, 34b.
- the composite pipe 30 becomes a common one Subjected to hydroforming process.
- the resulting component 40 is schematic and partially sectioned in Figure 2b shown.
- the component 40 has a thin region 41 which emerges from the outer Region 31a of the inner tube 31 results, as well as gradually thickened regions, namely a single thickened area 42, a double thickened area 43 and one triple thickened area 44.
- the thickened areas 42, 43, 44 result from the Addition of the wall thicknesses of the different outer ones partially pushed over each other Pipe sections 32, 33, 34.
- the design of the outer free ensures Ends 32a, 33a, 34a of the outer tube sections 32, 33, 34 have a shoulder-free contour.
- connection points between the inner tube 31 and the outer tube sections 32, 33, 34 are produced. However, these parts are already fixed by the shape connected with each other.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Powder Metallurgy (AREA)
- Body Structure For Vehicles (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
- Figur 1a
- eine schematische teilweise geschnittene Darstellung eines zusammengesetzten Rohres aus einem Innenrohr und einem vollständig auf das Innenrohr aufgeschobenen äußeren Rohrabschnitt;
- Figur 1b
- ein Bauteil aus einem zusammengesetzten Rohr gemäß Figur 1a nach dem Umformprozeß in schematischer Darstellung;
- Figur 2a
- ein zusammengesetztes Rohr aus einem Innenrohr und mehreren partiell übereinander geschobenen äußeren Rohrabschnitten;
- Figur 2b
- ein Bauteil aus einem zusammengesetzten Rohr gemäß Figur 2a nach dem Umformen in schematischer Darstellung.
- 10
- Rohr
- 11
- Innenrohr
- 11a
- äußerer Bereich von 11
- 11 b
- mittlerer Bereich von 11
- 12
- äußerer Rohrabschnitt
- 13
- äußeres Ende von 12
- 14
- äußeres Ende von 12
- 15
- Abschrägung
- 16
- Abschrägung
- 20
- Bauteil
- 21
- dünner Bereich von 20
- 22
- verdickter Bereich von 20
- 30
- Rohr
- 31
- Innenrohr
- 31 a
- äußerer Bereich von 31
- 32
- äußerer Rohrabschnitt
- 32a
- freies Ende von 32
- 32b
- Abschrägung an 32a
- 33
- äußerer Rohrabschnitt
- 33a
- freies Ende von 33
- 33b
- Abschrägung an 33a
- 34
- äußerer Rohrabschnitt
- 34a
- freies Ende von 34
- 34b
- Abschrägung an 34a
- 40
- Bauteil
- 41
- dünner Bereich von 40
- 42
- einfach verdickter Bereich von 40
- 43
- zweifach verdickter Bereich von 40
- 44
- dreifach verdickter Bereich von 40
Claims (9)
- Verfahren zum Herstellen eines Bauteils (20, 40) mittels Innenhochdruck-Umformen aus einem Rohr mit mindestens einem Abschnitt unterschiedlicher Wanddicke, derart, daß zunächst ein zusammengesetztes Rohr (10, 30) verwendet wird, indem auf ein Innenrohr (11; 31) mit gleichmäßiger Wanddicke zur Erzeugung des mindestens einen Abschnitts unterschiedlicher Wanddicke mindestens ein äußerer Rohrabschnitt (12; 32, 33, 34) aufgeschoben wird und anschließend das zusammengesetzte Rohr dem Innnenhochdruck-Umformprozeß unterworfen wird, so daß die Teile (11, 12; 31, 32, 33, 34) durch den Formgebungsprozeß fest miteinander verbunden werden,
dadurch gekennzeichnet, daß mindestens ein Ende (13, 14; 32a, 33a, 34a) des mindestens einen äußeren Rohrabschnittes (12; 32, 33, 34) im Querschnitt schräg gestaltet wird, so daß nach dem Innenhochdruck-Umformprozeß eine im wesentlichen
absatzfreie äußere Kontur des Bauteils (20, 40) resultiert. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die äußeren Rohrabschnitte (12, 32, 33, 34) vollständig oder partiell übereinander geschoben werden.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zur Erzeugung mehrerer Abschnitte unterschiedlicher Wanddicke mehrere äußere Rohrabschnitte (32, 33, 34) mit verschiedenen Durchmessern übereinander auf das Innenrohr (31) geschoben werden.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß vor und/oder nach dem Fügeprozeß ein oder mehrere zusätzliche Verbindungen zwischen dem Innenrohr (11; 31) und dem mindestens einen äußeren Rohrabschnitt (12; 32, 33, 34) hergestellt werden.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die ein oder mehreren zusätzlichen Verbindungen beim Verbinden des aus dem Innenhochdruck-Umformprozesses resultierenden Bauteils (20, 40) mit einem oder mehreren anderen Bauteilen hergestellt wird.
- Rohr mit mindestens einem Abschnitt unterschiedlicher Wanddicke, insbesondere zur Verwendung in einem Verfahren nach einem der Ansprüche 1 bis 5, wobei es sich um ein zusammengesetztes Rohr (10, 30) handelt, welches ein Innenrohr (11, 31) mit gleichmäßiger Wanddicke aufweist, auf welches zur Erzeugung des mindestens einen Abschnitts unterschiedlicher Wanddicke mindestens ein äußerer Rohrabschnitt (12; 32, 33, 34) aufgeschoben ist, dadurch gekennzeichnet, daß mindestens ein Ende (13, 14; 32a, 33a, 34a) des mindestens einen äußeren Rohrabschnittes (12; 32, 33, 34) im Querschnitt schräg gestaltet ist.
- Rohr nach Anspruch 6, dadurch gekennzeichnet, daß die äußeren Rohrabschnitte (12; 32, 33, 34) vollständig oder partiell übereinander geschoben sind.
- Rohr nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß zur Erzeugung mehrerer Abschnitte unterschiedlicher Wanddicke mehrere äußere Rohrabschnitte (32, 33, 34) mit verschiedenen Durchmessern übereinander auf das Innenrohr (31) geschoben sind.
- Rohr nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß es ein oder mehrere zusätzliche Verbindungen zwischen dem Innenrohr (11, 31) und dem mindestens einen Rohrabschnitt (12; 32, 33, 34) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19851492 | 1998-11-09 | ||
DE19851492A DE19851492A1 (de) | 1998-11-09 | 1998-11-09 | Verfahren zum Herstellen eines Bauteils mittels Innenhochdruck-Umformen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1000677A2 EP1000677A2 (de) | 2000-05-17 |
EP1000677A3 EP1000677A3 (de) | 2001-04-25 |
EP1000677B1 true EP1000677B1 (de) | 2004-02-18 |
Family
ID=7887103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99120812A Expired - Lifetime EP1000677B1 (de) | 1998-11-09 | 1999-10-21 | Verfahren zur Herstellung eines Bauteils mittels Innenhochdruck-Umformen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1000677B1 (de) |
AT (1) | ATE259685T1 (de) |
DE (2) | DE19851492A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6609301B1 (en) * | 1999-09-08 | 2003-08-26 | Magna International Inc. | Reinforced hydroformed members and methods of making the same |
DE10221880B4 (de) * | 2002-05-16 | 2007-03-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung eines verstärkten Rohrs, ein solches Rohr und dessen Verwendung |
DE10230284B4 (de) * | 2002-07-05 | 2008-10-16 | Daimler Ag | Verfahren und Vorrichtung zur Befestigung von Bauteilen an umfänglich geschlossensn Hohlprofilen |
DE10357671A1 (de) * | 2003-12-05 | 2005-07-07 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Herstellungsverfahren für ein Mehrschichtrohr zur Führung eines Wärmeübertragungsfluids und Mehrschichtrohr |
DE102009032045A1 (de) * | 2009-07-07 | 2011-01-20 | Elb-Form Gmbh | Doppelwandiges Rohr, Verfahren zu seiner Herstellung und seine Verwendung |
GB2486224B8 (en) * | 2010-12-07 | 2013-06-19 | Europ Technical Ct Etc Steering Nsk Deutschland Gmbh | Tailored thickness steering tube |
DE102011113662A1 (de) * | 2011-09-19 | 2013-03-21 | Benteler Automobiltechnik Gmbh | Strukturbauteil für ein Kraftfahrzeug mit einem hohlförmigen Grundprofil sowie Verfahren zu dessen Herstellung |
CN113664064A (zh) * | 2021-08-13 | 2021-11-19 | 山东钢铁集团日照有限公司 | 一种差厚管制管方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE548576C (de) * | 1928-03-01 | 1933-02-03 | Richard Krauss Dipl Ing | Verfahren zur Herstellung von eisernen Hochdruckrohren |
DE2709633C3 (de) * | 1976-03-26 | 1981-04-23 | Combustion Engineering, Inc., 06095 Windsor, Conn. | Vorrichtung zum Befestigen einer Muffe in einer Rohrleitung |
CA1139923A (en) * | 1979-02-28 | 1983-01-25 | Toshio Yoshida | Method of producing multiple-wall composite pipes |
JPS61266132A (ja) * | 1985-05-21 | 1986-11-25 | Musashi Seimitsu Ind Co Ltd | 組立カムシヤフトの製造方法 |
US4759111A (en) * | 1987-08-27 | 1988-07-26 | Ti Automotive Division Of Ti Canada Inc. | Method of forming reinforced box-selection frame members |
DE19511970C2 (de) * | 1995-04-18 | 1998-07-09 | Werdau Fahrzeugwerk | Verfahren zum Herstellen von verformten mehrwandigen Rohren mit Hohlräumen zwischen den Wandungen |
DE19617219C2 (de) * | 1996-04-30 | 1998-04-30 | Daimler Benz Ag | Verfahren zur Herstellung einer hohlen Welle |
-
1998
- 1998-11-09 DE DE19851492A patent/DE19851492A1/de not_active Withdrawn
-
1999
- 1999-10-21 AT AT99120812T patent/ATE259685T1/de not_active IP Right Cessation
- 1999-10-21 EP EP99120812A patent/EP1000677B1/de not_active Expired - Lifetime
- 1999-10-21 DE DE59908570T patent/DE59908570D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1000677A2 (de) | 2000-05-17 |
EP1000677A3 (de) | 2001-04-25 |
DE19851492A1 (de) | 2000-05-11 |
ATE259685T1 (de) | 2004-03-15 |
DE59908570D1 (de) | 2004-03-25 |
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