EP0770435B1 - Verfahren zur Herstellung eines Achsträgers - Google Patents

Verfahren zur Herstellung eines Achsträgers Download PDF

Info

Publication number
EP0770435B1
EP0770435B1 EP19950114847 EP95114847A EP0770435B1 EP 0770435 B1 EP0770435 B1 EP 0770435B1 EP 19950114847 EP19950114847 EP 19950114847 EP 95114847 A EP95114847 A EP 95114847A EP 0770435 B1 EP0770435 B1 EP 0770435B1
Authority
EP
European Patent Office
Prior art keywords
hollow profile
bending
internal pressure
tube
axle
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
EP19950114847
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0770435A1 (de
Inventor
Egon Olszewski
Rainer Hansen
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
Priority to EP19950114847 priority Critical patent/EP0770435B1/de
Priority to DE59504498T priority patent/DE59504498D1/de
Priority to ES95114847T priority patent/ES2124949T3/es
Publication of EP0770435A1 publication Critical patent/EP0770435A1/de
Application granted granted Critical
Publication of EP0770435B1 publication Critical patent/EP0770435B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • 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
    • B21D26/037—Forming branched tubes
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/15—Bending tubes using mandrels or the like using filling material of indefinite shape, e.g. sand, plastic material

Definitions

  • the invention relates to a method for manufacturing an axle beam for motor vehicles by bending and Hydroforming a straight metallic hollow profile.
  • Construction workpieces such as axle beams of motor vehicles are consistently carried out today in lightweight construction. Such construction workpieces are usually around hollow molded parts made of a straight metallic mostly cylindrical tube are manufactured.
  • the hydroforming process offers for the forming processing of the pipe various possibilities.
  • a cylindrical tube is used as the initial profile under the pressure of a liquid with simultaneous axial Feed movement widened and shaped like a divided hollow tool pressed.
  • Hydroforming is described in "WT Workshop Technology" 79 (1989), pages 210 to 214. Because of its manufacturing technology Advantages is the hydroforming process, especially in the mass production of Construction workpieces, for example for the automotive industry, widespread.
  • axle support is off Contour finished.
  • add-on parts welded to the axle beam can be reinforcements, for example in the form of gusset plates, that of stabilization serve the axle carrier.
  • Such attachments are usually used however for fastening the axle carrier or Definition of other components on the axle support required.
  • JP-A-64053719 also applies a method for Production of a construction workpiece by bending and hydroforming a straight metallic hollow profile the state of the art.
  • a method for Production of a construction workpiece by bending and hydroforming a straight metallic hollow profile the state of the art.
  • the hollow profile is then used bent by inner mandrels.
  • inner Support arbors is only comparatively simple Component geometries possible.
  • the invention is based on the prior art Task based on the production of curved axle beams to make it more appropriate and economical and the number of subsequently on the construction workpiece to reduce attachments to be welded on.
  • the basic idea of the invention is First, enough material in on the straight starting profile to relocate the zones of forming, creating forming areas be preformed. The creation of the contour of the Subframe is then done by bending and hydroforming Final shaping.
  • fastening or reinforcement areas of the axle support can also be hydroformed before the bending process be shaped out of the initial profile.
  • the method according to the invention thus makes it possible in any case much of the otherwise after the final shaping parts to be welded on to be replaced.
  • the axial force is usually rigid on both sides Transfer tools to the pipe. Usually acts these are hydraulically moved pistons with corresponding shaped heads that hold the tube at both ends to lock. An increasing pressure is then built up in the pipe. As soon as this is so high that there is a deformation of the pipe in the area of the pre-deformed areas comes, the ends of the tube are in the axial direction pressed. This process is controlled depending on the internal pressure. Then there is a shift of profile material to the areas to be deformed. This is done area-specific preforming of bulges in the zones of the later bend or the later fastening or reinforcement areas.
  • the bulging takes place under the influence of a counter pressure, that works specifically in the area to be deformed. This is a precise control of the expansion process possible.
  • the size of the preformed areas is proportional for shortening the length of the hollow profile. To dilute the material or even bursting in the area of To avoid forming bulge, the forehead of the Bulging during the forming process due to the counter pressure supported.
  • the back pressure can basically be different Generated way.
  • a convenient way include counter cylinders in the manufacturing process which are coordinated with the press tool.
  • An advantage of the method is that with the first Production step first the zones of the forming are prefabricated on a straight pipe. Especially the zones the maximum deformation in which the subsequent The preformed hollow profile is bent, can be targeted to the subsequent plastic forming are prepared.
  • the bending process takes place under high internal pressure, so that the hydroformed contours remain. Wrinkling or the tube is prevented from being pressed in. By preforming the zones of maximum deformation also becomes the elastic that is otherwise typical for bending Springback avoided.
  • the subsequent one Final shaping is also done by hydraulic internal pressure performed.
  • the axle carrier receives its final one Shape. Pushing the ends of the curved construction workpiece not necessary. This is a significant procedural advantage.
  • the axle beam is used during or after the final shaping calibrated. Basically, it is possible that the final shaping only includes calibration. With the repressing the surface roughness is leveled and the Dimensional accuracy of the construction workpieces increased. In addition, the strength is increased during calibration.
  • axle beam is attached Mounting openings are provided.
  • the assembly openings can be used for the attachment of additional components as well as for the implementation of other components, such as a brake line be.
  • the assembly openings are made at effective internal pressure. In this way it is avoided that the construction workpiece at the cutting Production of the assembly openings, for example by cutting or punching, deformed.
  • the construction workpiece Before the hydraulic final shaping, the construction workpiece, depending on the design, also be flattened in areas.
  • the preformed Bulges and / or sections of the construction workpiece flattened. This process takes place in the hydroforming tool.
  • Control devices and hydraulic devices the production system can be used for preforming, used in the bending process as well as in the final shaping will.
  • the number of attachments to be welded reduced. Necessary fastening or reinforcement areas on the body of the construction workpiece can be made in one piece from the initial profile shape out. The extra effort for that The provision and definition of attachments is minimized or can even depend on the construction workpiece be completely saved.
  • the invention allows the production of a simple and more economical designed axle carrier for motor vehicles.
  • a curved axle beam is made from a tube in one piece with integrated fastening or Reinforcement areas made.
  • Hydroforming carried out with feeding on the straight tube.
  • the zones of maximum deformation preformed.
  • the preformed Areas are then created according to the respective requirements pressed flat. So fastening or Reinforcement areas are formed.
  • the axle support gets its final shape. If necessary, the axle beam is then attached Provide holes, the punching as described below Internal pressure takes place.
  • FIG. 1 shows the manufacture of an axle support 1 for a passenger car, based on an initial profile in the form of a straight, round in cross section Tube 2.
  • the axle support 1 (Figure 1E and Figure 1F) essentially comprises two tubular longitudinal sections 3, which over a middle section 4 are connected to each other. Of the Center section 4 transmits in particular torsion and Bending forces from the longitudinal sections 3 in the central section 4 be directed. In the transitions 5 from the longitudinal sections 3 to the central section 4 are on Axle beam 1 formed areas 6. these can for example also for attaching attachments.
  • the tube 2 is provided in a fixed initial length L A , which is matched to the dimensions of the axle support 1 or to the forming processes carried out during manufacture (FIG. 1A).
  • bulges 7 are preformed on the tube 2 ( Figure 1B).
  • the preforming is done by hydraulic Internal pressure, with an axial pushing at the same time the ends 8 is made.
  • the resultant is not mandatory, but advantageous preformed tube 2 'then a heat treatment subjected to medium annealing. This can result in the Preforming internal stress of the tube 2 'is reduced will.
  • the axis contour 2 '' is then created by bending ( Figure 1C).
  • the tube stands during the bending process 2 'under high internal pressure, so that the hydroformed contour preserved.
  • the bending process can also affect connect a heat treatment.
  • the hydroforming tool is then used in an intermediate step a flattening made (Figure 1D).
  • Figure 1D Here, the Areas 6 'flattened.
  • Figure 1E receives the axle beam 1 its final contour with the required dimensional accuracy (Calibration). With effective internal pressure further punched the mounting holes 9. So will prevents the contour of the axle beam 1 from being pressed in becomes.
  • the preforming is carried out in a press tool 11 (compare Figures 2 and 3).
  • the press tool 11 has two tool halves 12, 13 on. On the two end sides 14, 15 an axial punch 16, 17 is arranged in each case. Furthermore has the press tool 11 in the zones where the bulges are preformed, adapted to this Removal openings 18. Here are counter cylinders 19 arranged, the piston 20 of the contour of the bulges are trained accordingly.
  • the tool halves 12, 13 are moved together hydraulically.
  • the tube 2 is at both ends 8 by likewise hydraulically moved pistons 21 with correspondingly shaped Heads 22 closed.
  • the tube 2 is then with a Pressurized media.
  • the supply of the print medium takes place via a dashed line in FIG Internal high-pressure line 23, which runs through the pistons 21 is.
  • the preformed tube 2 ' is then bent. Of the Bending process is shown in Figures 4 and 5.
  • the preformed tube 2 ' is used by a bending tool 25 added.
  • the ends 8 are through the adapter 26 closed.
  • the Center section 4 fixed by the counter contour 29.
  • the pre-shaped axis contour 2 '' is after the bending process a hydroforming tool 30 in which the Final shaping is carried out (Figure 6).
  • the areas 6 ' are first flattened, whereby the forming areas 6 get their configuration.
  • the axis contour 2 '' is also in the areas 6 ' slightly flattened on the top (see also Figure 7).
  • the adapter 31 positively closed.
  • hydraulically Final shaping in which the axle support 1 with the required Dimensional accuracy is calibrated. After that become the assembly openings 9 when the internal pressure acts punched.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
EP19950114847 1995-09-21 1995-09-21 Verfahren zur Herstellung eines Achsträgers Expired - Lifetime EP0770435B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19950114847 EP0770435B1 (de) 1995-09-21 1995-09-21 Verfahren zur Herstellung eines Achsträgers
DE59504498T DE59504498D1 (de) 1995-09-21 1995-09-21 Verfahren zur Herstellung eines Achsträgers
ES95114847T ES2124949T3 (es) 1995-09-21 1995-09-21 Procedimiento para fabricar un soporte de eje.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19950114847 EP0770435B1 (de) 1995-09-21 1995-09-21 Verfahren zur Herstellung eines Achsträgers

Publications (2)

Publication Number Publication Date
EP0770435A1 EP0770435A1 (de) 1997-05-02
EP0770435B1 true EP0770435B1 (de) 1998-12-09

Family

ID=8219640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950114847 Expired - Lifetime EP0770435B1 (de) 1995-09-21 1995-09-21 Verfahren zur Herstellung eines Achsträgers

Country Status (3)

Country Link
EP (1) EP0770435B1 (ja)
DE (1) DE59504498D1 (ja)
ES (1) ES2124949T3 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6098437A (en) * 1998-03-20 2000-08-08 The Budd Company Hydroformed control arm
DE19829577B4 (de) * 1998-07-02 2005-06-16 Carsten Dipl.-Ing. Binder Verfahren und Vorrichtung zur Herstellung von Teilen mit Hilfe der Innen-Hochdruck-Umformtechnik
JP2000301251A (ja) * 1998-12-31 2000-10-31 Dana Corp 前車軸ビームのハイドロフォーム法による製造方法
NL1011330C2 (nl) * 1999-02-17 2000-08-18 Corus Staal Bv Werkwijze voor het vervormen van een dunwandig metalen buisstuk.
DE19955694A1 (de) * 1999-11-18 2001-05-23 Alusuisse Tech & Man Ag Verfahren zum Umformen eines Ausgangsprofils o. dgl. Werkstückes sowie Profil dafür
FR2828120B1 (fr) 2001-08-06 2003-10-10 Brigitte Dossmann Procede et dispositif pour courber un tube cylindrique ou analogue

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6453719A (en) * 1987-08-20 1989-03-01 Agency Ind Science Techn Production of bend pipe
US4991293A (en) * 1989-08-02 1991-02-12 Proprietary Technology, Inc. Means for providing very small bend radii in the tube-like structures
US5890387A (en) * 1989-08-24 1999-04-06 Aquaform Inc. Apparatus and method for forming and hydropiercing a tubular frame member
DE4017072A1 (de) 1990-05-26 1991-11-28 Benteler Werke Ag Verfahren zum hydraulischen umformen eines rohrfoermigen hohlkoerpers und vorrichtung zur durchfuehrung des verfahrens
DE4201819A1 (de) * 1991-01-28 1992-07-30 Mannesmann Ag Verfahren und vorrichtung zum hydraulischen aufweiten von rohrfoermigen hohlprofilen

Also Published As

Publication number Publication date
ES2124949T3 (es) 1999-02-16
DE59504498D1 (de) 1999-01-21
EP0770435A1 (de) 1997-05-02

Similar Documents

Publication Publication Date Title
EP0425059B1 (de) Rohrförmiges Stahlprofil für die Türverstärkung
DE19653509B4 (de) Rahmenstruktur einer Fahrzeugkarosserie aus Knotenelementen und angeschlossenen, vorprofilierten Trägerelementen
DE60221416T2 (de) Modularer unterboden für ein kraftfahrzeug
EP1818115B1 (de) Verfahren zur Herstellung eines Struktur- oder Fahrwerkbauteils für Kraftfahrzeuge
DE19535870C2 (de) Verfahren zum Herstellen von schalenförmigen Hohlstrukturen aus gedoppelten Blechzuschnitten mittels Innenhochdruckumformen
DE102006025522B4 (de) Verfahren und Vorrichtung zur Herstellung strukturierter, geschlossener Hohlprofile
EP0758565A1 (de) Verfahren und Vorrichtung zum Herstellen von doppelwandigen Durchbrechungen in Bauteilen nach dem Innenhochdruck-Umform-verfahren sowie ein damit hergestellter Querlenker
DE102007038036B4 (de) Verfahren zur Herstellung eines rohrförmigen Tragprofils für einen Instrumententräger
DE10007329A1 (de) Verfahren zur Herstellung insbesondere einer Fahrzeugkarosserie- und Rahmenanordnung
EP0862956B1 (de) Karosseriehohlträger, sowie Verfahren zur dessen Herstellung mittels Innenhochdruck
EP1933998B1 (de) Verfahren zum herstellen eines achsenbauteils
EP0770435B1 (de) Verfahren zur Herstellung eines Achsträgers
DE102007038713B4 (de) Verfahren zur Herstellung von partiell verstärkten Hohlprofilen
WO2007121709A1 (de) Verfahren zur herstellung eines kraftfahrzeug-schwenklagers in schalenbauweise
EP1890926B1 (de) Zahnstangenlenkung mit unterschiedlichen wandstärken
DE10241406B4 (de) Einstückiger Federlenker
EP0894951A2 (de) Verfahren und Vorrichtung zur Herstellung einer Anbindung eines Lambda-Sondenhalters an ein Abgasrohr
DE60023417T2 (de) Verfahren für den Zusammenbau einer Fahrzeugkarrosserie und Rahmen
DE19843825A1 (de) Verfahren zur Herstellung eines Lenkerarms für das Fahrwerk eines Kraftfahrzeugs
EP1364817B1 (de) Einstückiger Federlenker
DE19853128C2 (de) Stoßfängeranordnung eines Kraftfahrzeuges und Verfahren zu deren Herstellung
EP1000677A2 (de) Verfahren zur Herstellung eines Bauteils mittels Innenhochdruck-Umformen
DE4343841C2 (de) Verfahren zum Herstellen einer Fahrzeugstrebe in Hohlkörperform
DE10043880B4 (de) Stossfänger
EP1357017B1 (de) Rahmenstruktur eines Fahrzeugs

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

17P Request for examination filed

Effective date: 19960206

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT PT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT PT SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981210

REF Corresponds to:

Ref document number: 59504498

Country of ref document: DE

Date of ref document: 19990121

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2124949

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19981209

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

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050831

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050909

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050912

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20050913

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20050914

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050928

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060922

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060930

Year of fee payment: 12

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 NON-PAYMENT OF DUE FEES

Effective date: 20070321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070403

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20070321

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060921

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070531

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: 20060921

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070921