WO2009068129A1 - Structure porteuse et procédé de fabrication - Google Patents

Structure porteuse et procédé de fabrication Download PDF

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Publication number
WO2009068129A1
WO2009068129A1 PCT/EP2008/007697 EP2008007697W WO2009068129A1 WO 2009068129 A1 WO2009068129 A1 WO 2009068129A1 EP 2008007697 W EP2008007697 W EP 2008007697W WO 2009068129 A1 WO2009068129 A1 WO 2009068129A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow profile
hollow
profile
chamber
supporting structure
Prior art date
Application number
PCT/EP2008/007697
Other languages
German (de)
English (en)
Inventor
Kai-Uwe Dudziak
Dieter Junge
Thorsten Wichmann
Jürgen Falke
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2009068129A1 publication Critical patent/WO2009068129A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/14—Dashboards as superstructure sub-units
    • B62D25/145—Dashboards as superstructure sub-units having a crossbeam incorporated therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D27/00—Connections between superstructure or understructure sub-units
    • B62D27/02—Connections between superstructure or understructure sub-units rigid

Definitions

  • the invention relates to a support structure according to the preamble of claim 1 and a method for their preparation according to the preamble of claim. 7
  • a generic support structure and a method for their preparation is known from DE 195 19 353 Al.
  • a first tubular or pre-profiled hollow profile is inserted into a multi-part tool and expanded by fluidic internal high pressure, whereby the first hollow section is finished.
  • the first hollow profile has a channel-shaped receptacle.
  • a second tubular or pre-profiled hollow profile is inserted into the receptacle of the first, the tool is closed with a new upper part and the second hollow profile is inflated by fluidic internal high pressure. In this case, this is widened into the receptacle and creates a form-fitting on the wall.
  • the first outer hollow profile is crimped and has a central tubular receptacle for the second inner hollow profile, which projects through the first hollow profile.
  • the invention has the object of developing a generic support structure to the effect that a high stability of the support structure with a high structural variability is achieved in a relatively simple manner without additional stiffening components.
  • a method for their preparation is to be specified.
  • the support structure according to the invention consists of at least two hollow profiles, which are connected by positive engagement with each other and in which the first hollow profile surrounds the second, a high stability of the construction is achieved against externally acting mechanical forces.
  • a nearly complete conformal system is achieved on the inside of the first hollow profile, whose cross section deviates from a circular shape, so that a positive connection is formed, in which the hollow profiles are held against rotation against each other.
  • the fact that the second hollow profile extends through the first this is also taken captive in the first hollow profile.
  • the hollow sections are practically no longer detachable from each other without any of the two hollow sections being damaged.
  • the first hollow section is formed as an extruded profile with at least two separate from each other by a partition chambers.
  • the extruded profile extends in the transverse direction to the second hollow profile, but the chambers are parallel to the second hollow profile.
  • the second hollow profile which projects through this, received positively.
  • the profiles are pushed into each other, or pushed the second hollow section through the first, after which then the sliding assembly is exposed to a fluidic internal high pressure.
  • the sliding assembly can be achieved within or already outside the forming tool.
  • suitable pressure control it is not absolutely necessary that a support pressure is maintained in the adjoining the receiving chamber chamber of the extruded profile.
  • the extruded profile can be designed very complex and used in motor vehicle for connection to other components such as steering console, console of the A-pillar or tunnel strut, while the tubular hollow profile can act as a longitudinal or cross member.
  • the extruded profile for joining offers favorable surfaces, in particular joining flanges can be formed.
  • the second hollow profile can be encompassed in its axial course of several first hollow sections at different locations. Even with such a multi-part design of the support structure only a single forming tool is required. The apparatus and pressure control technical effort is - except for the enlargement of the tool and its component holder - low, since only the inner second hollow section is placed under internal high pressure. Finally, the extruded profile in the form of a console on a much better crash behavior compared to the usual very rigid die-cast consoles, since the extruded profile can absorb much better crash energy by deformation.
  • the second hollow profile has a plug-in element, preferably designed as a flange, which preferably dips into a pocket formed in the chamber to form a press fit.
  • a plug-in element preferably designed as a flange, which preferably dips into a pocket formed in the chamber to form a press fit.
  • the plug element can be realized, such as in the form of knobs, pins, nozzles or elongated strips.
  • the second hollow profile as an extruded profile, wherein the plug-in element is designed as a flange. This requires a lower production cost, since at the same time the flange is produced with the production of the hollow profile.
  • the flange by appropriate design of the second profile as a roll or rolled profile, wherein the so rolled or rolled Hollow profile is then welded longitudinally.
  • the first hollow profile is expanded during the plastic expansion of the second hollow profile.
  • the outer first hollow profile elastically springs back, which forms an extremely strong frictional interference fit with the plastically no longer reshaping inner second hollow profile, which further increases the stability of the support structure and the release of the hollow sections from each other even more difficult.
  • this measure is also weight neutral, ie without Zuatzbaumaschine, and can be executed in procedural economic manner in one operation with the expansion process of the second hollow section and in the same forming tool.
  • the first hollow profile outside of the projecting portion of the second hollow profile is axially enclosed.
  • the enclosure can be done as a result of the internal high pressure induced widening of the second hollow profile or in a subsequent operation by widening of the second hollow profile.
  • the outer diameter of the second hollow profile is increased beyond the inner diameter of the first hollow profile out, wherein hollow profile material of the second hollow profile is displaced to the outside and applies to the end faces of the first hollow profile.
  • the chamber receiving the second hollow profile of the first hollow profile has a longitudinal gap extending over its entire extent, where there expires the first hollow profile at least at one of the gap edges in a flange-like end. Furthermore, the second hollow profile on a mounting flange which penetrates the longitudinal gap of the chamber and at least locally abuts the flange-like end. The flange-like end and the mounting flange are then connected to each other by toxen, gluing, welding, riveting, soldering and / or by a plastic extrusion.
  • the mounting flange may be formed on the second hollow profile component or by the hollow profile by shaping, by the design as an extruded profile or roll or roll profile followed by longitudinal seam welding.
  • the longitudinal gap with the flange-like end of the first hollow profile can be easily represented by extrusion in the production of the first hollow profile.
  • a gap edge containing the end of the first hollow profile can then be bent and flattened flange.
  • the flanges have openings through which the injected plastic can pass through, so that a cohesive no longer removable enclosure of the flanges is achieved.
  • the joining of the flange can take place after hydroforming.
  • the gap further alsklafft as desired, so that a flat contact with the flanges is no longer given, which would make the joining operation considerably more difficult.
  • the flanges allow higher-load areas to be integrated directly into the supporting structure.
  • the support structure is part of a metal-plastic hybrid assembly.
  • the integration of the support structure in the assembly fits in an advantageous manner in the concept of the construction of large-scale carcass structures without fasteners and stiffening plates with at least as good if not better functionality in terms of attachment and stability.
  • the assembly with the support structure as a whole can be produced in a forming tool, wherein the same internal high pressure in achieving the positive connection for the supporting structure and the production of the metal-plastic Hybrid composite, in which the hydroforming and injection molding work together in a combination process, can be used.
  • the injection molding of the composite for the production of the clip-like encapsulation of the abutting flanges of the supporting structure can also be used simultaneously here.
  • the forming tool for the supporting structure may be a modified injection-molding or internal-high-pressure forming tool.
  • the plastic encapsulation and / or the plastic part of the metal-plastic hybrid assembly is produced by injection molding injection molding, which on the one hand contributes significantly to the weight reduction of the assembly. Furthermore, on the other hand, its rigidity is increased due to the microcellular structure of the solidified foam.
  • FIG. 1 is a perspective view of a support structure according to the invention with joined flanges of the hollow profiles
  • FIG. 2 is a side view of the support structure of FIG. 1 with a flange of the second hollow profile surrounded by two flanges of the first hollow profile, FIG.
  • Fig. 3 is a side view of a support structure according to the invention with a plug-in element of the second Hollow profile and a pocket of the first hollow profile,
  • Fig. 4 in a lateral longitudinal section in sections a support structure according to the invention with a second hollow profile axially enclosed first hollow section.
  • a support structure 1 which consists of three hollow sections 2,3,4, which are interconnected by positive locking.
  • a first hollow section 2 extends in the transverse direction to the second hollow section 3 and, like the hollow section 3, is designed as an extruded profile, wherein both hollow sections 2 and 3 fundamentally differ structurally.
  • the hollow section 2 is truss-like with three spaced apart from each other by a partition wall 5,12,26 chambers 6,7,8,9 formed, which are seen from the hollow profile 3 arranged one behind the other.
  • the length of the hollow profile 2 from the chamber 6 to the chamber 9, which has a polygonal cross-sectional shape, is several times greater than the distance between the two openings 10,11 of each chamber 6,7,8,9.
  • the chambers 6,7,8,9 are parallel to the second hollow section 3, which in contrast to the hollow profile 2 has an elongated circumferentially closed tube shape.
  • the hollow section 3 extends through the chamber 9 of the first hollow section 2 and is received in this form-fitting and thereby encompassed by the first hollow section 2.
  • the outer side 37 of the hollow profile 3 is located in the projecting portion of the hollow section 2 over the entire circumference completely contoured on the inside 38 of the chamber 9 and is thus at least rotatably connected to the hollow section 2.
  • the chamber 9 has in its the partition wall 12 opposite peripheral region 13 extending over its entire extent from opening 10 to opening 11 longitudinal gap 14, where there the first hollow section 2 at both gap edges 15,16 in a thicker and a thinner flange end 17,18 runs out. It is also conceivable that the gap 14 is located in a different circumferential region of the chamber 9, but outside the partition wall 12.
  • the two ends 17, 18 of the hollow profile 2 grasp a mounting flange 19 of the second hollow profile 3 which extends over the entire longitudinal extent of the hollow profile 3 and penetrates the longitudinal gap 14 of the chamber 9 and rests flat against the flange-like ends 17, 18.
  • the ends 17,18 and the mounting flange 19 are connected by a plastic extrusion.
  • through holes 29,30,31 are formed, which penetrates the plastic during the encapsulation and after solidification closely pressed together, since the plastic is subject to a certain shrinkage during solidification.
  • the plastic can also grip the end edges of the flanges 17-19 to further improve the attachment during the overmolding so that it holds the flanges together like a ring.
  • the support structure 1 is here part of a metal-plastic hybrid assembly, the plastic extrusion of the ends 17,18 and the mounting flange 19 part forms the connecting portion of the support structure 1 to the remaining part of the assembly.
  • the hollow profile 4 is formed in the same way as the hollow profile 2 and spaced parallel to this in the extension direction of the hollow profile 3.
  • the connection between the two hollow sections 3 and 4 is also the same as between the hollow sections 2 and 3.
  • the first hollow section 20 of the support structure 36 also has a longitudinal gap 21, however, in deviation from the embodiment described above, only one end 22 is formed as a flange. This is due to the comparatively much thicker mounting flange 23 in the chamber 24 of the hollow section 20 received hollow profile 25 plan.
  • aligned through holes 27,28 are formed through which the injected plastic can pass through and forms a kind of anchor for the flanges 22,23.
  • the second hollow profile 25 has a plug-in element 32, preferably formed as a flange, on a gap-facing peripheral region on the outer side 37, which in a formed in the chamber 24 by corresponding shaping of the partition wall 33 between the adjacent chamber 34 and the chamber 24 bag 35th preferably immersed to form a press fit.
  • the first hollow profiles 2 or 20 outside the protruding portion, so the chamber 9 or 24 from the second hollow section 3 or 25 may be axially enclosed to form a further positive connection.
  • the second hollow profile 3, 25 is pushed into a chamber 9, 24 of the first hollow profile 2, 20, the first hollow profile 2, 2 embracing the second 3, 25.
  • the two hollow sections 2.20; 3.25 are introduced into a forming tool prior to telescoping or in sliding position, after which the second hollow section 3.25 is widened by means of high-pressure internal under contour-accurate contact with the inside 38 of the first hollow section 2.20.
  • a die-cast part 39 is mounted in use as a steering console, in particular screwed.
  • this component it is also conceivable to produce this component by injection molding, and this can be integrated into the manufacturing process of the metal-plastic hybrid assembly with.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne une structure porteuse (1, 36) composée d'au moins deux profilés creux (2, 3, 4) connectés par complémentarité de forme. L'invention vise à obtenir une grande stabilité de la structure porteuse (1, 36) sans composants de rigidification supplémentaires, de façon relativement simple, avec une grande variabilité constructive. A cet effet, un premier profilé creux (2, 20) s'étendant perpendiculairement au deuxième profilé creux (3, 25), est conçu en tant que profilé extrudé comportant au moins deux chambres (6, 7, 8, 9, 24, 34) parallèles au deuxième profilé creux (3, 25), séparées par une paroi de séparation (5, 12, 26), le deuxième profilé creux (3, 25), qui traverse une chambre (9, 24), étant logé par la chambre par complémentarité de forme et entouré par le premier profilé creux (2, 20).
PCT/EP2008/007697 2007-11-30 2008-09-16 Structure porteuse et procédé de fabrication WO2009068129A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710057724 DE102007057724A1 (de) 2007-11-30 2007-11-30 Tragkonstruktion und ein Verfahren zu deren Herstellung
DE102007057724.0 2007-11-30

Publications (1)

Publication Number Publication Date
WO2009068129A1 true WO2009068129A1 (fr) 2009-06-04

Family

ID=39967755

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/007697 WO2009068129A1 (fr) 2007-11-30 2008-09-16 Structure porteuse et procédé de fabrication

Country Status (2)

Country Link
DE (1) DE102007057724A1 (fr)
WO (1) WO2009068129A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014067604A1 (fr) * 2012-10-31 2014-05-08 Daimler Ag Agencement de traverse et son procédé de fabrication

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014244A1 (de) * 2009-03-20 2010-11-18 Daimler Ag Verbundbauteil mit wenigstens zwei Strukturbauteilen für eine Kraftwagenkarosserie
DE102010014542B4 (de) * 2010-04-10 2018-06-07 Daimler Ag Verfahren zur Herstellung eines Verbundbauteils

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328393A (en) * 1997-08-21 1999-02-24 Rover Group Securing components together and a structural member so formed
US5934733A (en) * 1997-12-19 1999-08-10 General Motors Corporation Extruded instrument panel structure
US20070222200A1 (en) * 2004-05-21 2007-09-27 Showa Denko K.K. Steering Support Beam

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519353A1 (de) 1995-05-26 1996-11-28 Porsche Ag Träger einer Aufbaustruktur eines Fahrzeuges und Verfahren zu dessen Herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328393A (en) * 1997-08-21 1999-02-24 Rover Group Securing components together and a structural member so formed
US5934733A (en) * 1997-12-19 1999-08-10 General Motors Corporation Extruded instrument panel structure
US20070222200A1 (en) * 2004-05-21 2007-09-27 Showa Denko K.K. Steering Support Beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014067604A1 (fr) * 2012-10-31 2014-05-08 Daimler Ag Agencement de traverse et son procédé de fabrication

Also Published As

Publication number Publication date
DE102007057724A1 (de) 2009-06-04

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