EP1933999B1 - Einrichtung zur herstellung eines querträgers mit geschlossenem profil mit einer stanze und/oder matrize mit anpassbarer länge und entsprechendes herstellungsverfahren - Google Patents

Einrichtung zur herstellung eines querträgers mit geschlossenem profil mit einer stanze und/oder matrize mit anpassbarer länge und entsprechendes herstellungsverfahren Download PDF

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Publication number
EP1933999B1
EP1933999B1 EP06820253A EP06820253A EP1933999B1 EP 1933999 B1 EP1933999 B1 EP 1933999B1 EP 06820253 A EP06820253 A EP 06820253A EP 06820253 A EP06820253 A EP 06820253A EP 1933999 B1 EP1933999 B1 EP 1933999B1
Authority
EP
European Patent Office
Prior art keywords
closed
punch
length
section
cross
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.)
Not-in-force
Application number
EP06820253A
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English (en)
French (fr)
Other versions
EP1933999A1 (de
Inventor
Vincent Gillet
Julien Berson
Ludovic Ribay
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.)
Auto Chassis International SNC
Original Assignee
Auto Chassis International SNC
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 Auto Chassis International SNC filed Critical Auto Chassis International SNC
Priority to PL06820253T priority Critical patent/PL1933999T3/pl
Publication of EP1933999A1 publication Critical patent/EP1933999A1/de
Application granted granted Critical
Publication of EP1933999B1 publication Critical patent/EP1933999B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B21D53/90—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards axle-housings
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • 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

Definitions

  • the field of the invention is that of motor vehicles. More specifically, the invention relates to a tool for manufacturing a cross member with a closed section according to the preamble of claim 1, and a method of manufacturing such a cross member according to the preamble of claim 7 for the flexible axles for motor vehicles. Such tooling and such a method are known from the document EP 1 134 047 .
  • a flexible axle comprises two longitudinal arms each carrying a wheel mounting bracket and connected by a transverse connecting member called cross member or profile.
  • the principle of flexible axles reconciles a high stiffness in bending and a relative flexibility in torsion. In general, it is through the geometry of the section of the cross member, via its bending and torsional inertia, that the desired compromise between flexural stiffness and (relative) torsional flexibility is achieved.
  • the flexible axles are indeed tainted with a number of limitations among which a delicate compromise between longitudinal and transverse stiffness and durability conditioned by the endurance resistance of each of their components, subjected to significant elastic deformations.
  • the connecting element, or through is therefore one of the most difficult components to develop, especially in terms of endurance and behavior.
  • the crossbar connecting the longitudinal arms is made according to two different technologies.
  • the crossbar is made from a folded sheet metal element (or stamped) so as to provide a section having a shape of "U", "V” or “L".
  • These sleepers generally require to be associated with an anti-roll bar, providing torsional stiffness to the axle.
  • the second technology is to integrate the anti-roll stiffness function with the crossbar.
  • the cross is manufactured from a tube generally having a circular section, the tube being subjected at least in its central part to a deformation step (at the end of which a portion of the wall is crushed against another portion of the wall) to obtain the desired stiffness in torsion and flexion (examples: Ford 806 (registered trademarks) or Opel Zafira (registered trademarks)).
  • the diversity of anti-roll stiffness according to the needs is ensured by modification of the shape of the section of the cross-member and / or modification of the thickness of the tube.
  • the invention applies to sleepers made according to this second technology, these being commonly referred to as “closed-profile sleepers” or “closed-section sleepers”.
  • the cross tube is only deformed in a transverse portion to reduce torsional stiffness, and retains stronger torsion sections (eg circular) at the ends, to facilitate connection to the suspension arm by welding.
  • the crossbar of a flexible axle is characterized by a high stiffness in bending and a low torsion stiffness, the latter must be precisely calibrated (associated with the anti-roll stiffness of the axle.
  • One of the factors influencing the anti-roll stiffness is the dispersion over the thickness of the tube.
  • the problem is to decrease the sensitivity of the anti-roll stiffness of the axle to the dispersions on the thickness of the tube.
  • the order of magnitude is such that a dispersion of +/- 0.1 mm the thickness of the tube can generate of the order of three times the tolerance interval of the anti-roll stiffness of the axle of the specifications.
  • a first solution is to work with tube suppliers to control dispersions on the thickness of the tube (from a rolling process and welding), using a sorting method.
  • tubes from a rolling and welding process are used, to which a re-stretching is subsequently applied to improve the tolerance on the thickness.
  • a hot stamping process is used which makes it possible to better control the geometry of the sections formed.
  • the tube sheets are connected at each end of the cross-member by a "clinching" method (puncturing of one sheet in the other by punching).
  • the invention particularly aims to overcome the disadvantages of the prior art.
  • the object of the invention is to propose a tool for manufacturing a closed-section cross member for a flexible axle according to claim 1 which makes it possible to better control the dispersion of the torsion stiffness of the crossbar compared with the solutions of the prior art.
  • the invention also aims to provide such a tool that is simple in design and easy to implement.
  • the invention also aims to propose a method of manufacturing such a cross member, according to claim 7.
  • a tool for manufacturing a cross-section with a closed section intended to connect two longitudinal arms of a flexible axle of a motor vehicle said tooling comprising at least one die intended to cooperate with a punch to form on said closed section of said crosspiece a torsion zone length, and means for holding said crosspiece in position, characterized in that said matrix and / or said punch are adaptable in length to adapt said length of said torsion zone.
  • said matrix and said punch each comprise at least two parts that may be spaced apart / close to each other.
  • said two parts of said die and / or said punch may be actuated by at least one jack.
  • said two parts of said matrix and / or said punch are maintained in the extension of one another using screwing means.
  • the tooling preferably comprises a set of shims capable of being interposed between said two parts of said die and / or said punch.
  • the set of shims can then comprise a variety of shims of different thicknesses to cover a given amplitude, with the desired accuracy.
  • said means for holding in position comprise at least one variable-displacement mandrel.
  • Such mandrels contribute to the modularity of the tooling, allowing to adapt it according to both the thickness of the cross member and its length.
  • the invention also relates to a method of manufacturing a cross-section with a closed section intended to connect two longitudinal arms of a flexible axle of a motor vehicle, using a tool comprising at least one die intended to cooperate with a punch. to form on said closed section of said cross member a torsion zone length, and means for holding said crosspiece in position, characterized in that it comprises a step of adjusting the length of said matrix and / or said punch in order to adapting said length of said torsion zone.
  • the method comprises a preliminary step of calculating said length of said torsion zone as a function of the desired torsional stiffness for said cross-member and the wall thickness of said section.
  • the method comprises a step of adjusting the stroke of two mandrels forming said holding means in position.
  • the conventional tooling comprises a punch 2 and a die 3 actuated by a press and intended to cooperate to form the torsion zone, and mandrels 4 intended to bear against the ends of the tube 1.
  • the tube is placed in the press, and the mandrels are advanced against the tube so as to lock it; then we close the press.
  • the figure 2 illustrates the forming step of the torsion zone over a fixed and fixed length, the die 3 and the punch 2 crushing between them the tube.
  • the press is opened (the die 3 and the punch 2 are therefore spaced apart from one another) and the mandrels are moved away from the tube ( figure 3 ).
  • the torsion zone of a closed-section crosspiece denotes the zone L corresponding to the portion central of the cross.
  • the geometric profile of the section of the tube, the thickness of the tube and the length of the torsion zone are factors of order 1 for obtaining the torsional stiffness of the crossbar.
  • the variation of the length ⁇ L of the torsion zone varies the torsion stiffness R of the crossbar in the following way: if L increases, R decreases, and conversely .
  • the crossbar when the length of the torsion zone L is minimal, the crossbar has a maximum torsion stiffness ( figure 5 ). Conversely, when the length of the torsion zone L is maximum, the crossbar has a minimum torsional stiffness ( figure 6 ).
  • the principle of the invention illustrated by the figure 7 lies in the fact of making the punch 2 and the matrix 3 adaptable in length so that they allow variations in length ⁇ L corresponding to the length of the desired torsion zone.
  • the punch 2 and the die 3 each have two parts, respectively 2a, 2b and 3a, 3b may be moved closer or spaced apart from each other to obtain a variation ⁇ L.
  • the spacing between the parts 2a, 2b on the one hand, and the parts 3a, 3b on the other hand, is obtained by interposing between them one or more shims 6.
  • the number and the thickness of the shims are chosen according to the desired ⁇ L.
  • mandrel races 4 are controlled by hydraulic cylinders (not shown) ensuring the translation of the mandrels.
  • the adaptive adjustment of the tooling that has just been described is performed between each burst of production (a burst being defined by a batch of tubes characterized by an average thickness value of the tubes), in press, with or without partial dismantling. tooling.
  • the length of the torsion zone is calculated as a function of the thickness of the tube, this for a stiffness fixed by specifications.
  • the Figures 9 to 11 are graphs illustrating an example of a torsion stiffness tolerance range obtained by the invention as a function of a thickness dispersion and a given working length variation.
  • the graph of the figure 9 indicates a thickness dispersion (between 3.35 mm and 3.55 mm) on a batch of tubes.
  • the graph of the figure 10 indicates working length variations (corresponding to the length of the torsion zone).
  • the graph of the figure 11 indicates the output data for torsional stiffness.
  • the variation in working length (denoted L on the figure 4a ) between 618 and 700 mm makes it possible to respect a tolerance tolerance of stiffness of ⁇ 2 m.daN / ° for a tolerance on the thickness of the tube of ⁇ 0,1 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (9)

  1. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil, der dazu bestimmt ist, zwei Längslenker einer biegsamen Achse eines Kraftfahrzeugs zu verbinden, wobei die Einrichtung wenigstens eine Matrize (3), die dazu bestimmt ist, mit einem Stanzstempel (2) zusammenzuwirken, um in dem geschlossenen Profil des Querträgers ein Torsionszonen-Teilstück (L) zu bilden, und Mittel zum Halten des Querträgers an seiner Position enthält, dadurch gekennzeichnet, dass die Matrize (3) und/oder der Stanzstempel (2) längeneinstellbar sind, um an die Länge der Torsionszone (L) angepasst zu werden.
  2. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil nach Anspruch 1, dadurch gekennzeichnet, dass die Matrize (3) und der Stanzstempel (2) jeweils wenigstens zwei Teile (3a), (3b), (2a), (2b) enthalten, die voneinander beabstandet/aneinander angenähert werden können.
  3. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Teile (3a), (3b), (2a), (2b) der Matrize (3) und/oder des Stanzstempels (2) durch wenigstens ein Stellglied betätigt werden können.
  4. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Teile (3a), (3b), (2a), (2b) der Matrize (3) und/oder des Stanzstempels (2) mit Hilfe von Verschraubungsmitteln (5) in gegenseitiger Verlängerung gehalten werden.
  5. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil nach Anspruch 4, dadurch gekennzeichnet, dass sie einen Satz Keile (6) enthält, die zwischen die zwei Teile (3a), (3b), (2a), (2b) der Matrize (3) und/oder des Stanzstempels (2) eingefügt werden können.
  6. Einrichtung zur Herstellung eines Querträgers mit geschlossenem Profil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Mittel zum Halten des Querträgers an seiner Position wenigstens einen Dorn (4) mit variablem Hub enthalten.
  7. Verfahren zur Herstellung eines Querträgers mit geschlossenem Profil, der dazu bestimmt ist, zwei Längslenker einer biegsamen Achse eines Kraftfahrzeugs zu verbinden, mit Hilfe einer Einrichtung, die wenigstens eine Matrize (3), die dazu bestimmt ist, mit einem Stanzstempel (2) zusammenzuwirken, um in dem geschlossenen Profil des Querträgers ein Torsionszonen-Teilstück (L) zu bilden, und Mittel zum Halten des Querträgers an seiner Position enthält, dadurch gekennzeichnet, dass es einen Schritt des Einstellens der Länge der Matrize (3) und/oder des Stanzstempels (2) enthält, um sie an die Länge der Torsionszone (L) anzupassen.
  8. Verfahren zur Herstellung eines Querträgers mit geschlossenem Profil nach Anspruch 7, dadurch gekennzeichnet, dass es einen vorhergehenden Schritt des Berechnens der Länge der Torsionszone (L) in Abhängigkeit von der gewünschten Torsionssteifigkeit für den Querträger und von der Wanddicke des Profils enthält.
  9. Verfahren zur Herstellung eines Querträgers mit geschlossenem Profil nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, dass es einen Schritt des Einstellens des Hubs von zwei Dornen (4), die die Mittel zum Halten des Querträgers an seiner Position bilden, enthält.
EP06820253A 2005-10-04 2006-10-04 Einrichtung zur herstellung eines querträgers mit geschlossenem profil mit einer stanze und/oder matrize mit anpassbarer länge und entsprechendes herstellungsverfahren Not-in-force EP1933999B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06820253T PL1933999T3 (pl) 2005-10-04 2006-10-04 Oprzyrządowanie do wytwarzania belki poprzecznej o przekroju zamkniętym zawierające matrycę i/lub stempel o dostosowanej długości i odpowiedni sposób wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0510131A FR2891480B1 (fr) 2005-10-04 2005-10-04 Outillage de fabrication d'une traverse a section fermee comprenant une matrice et/ou un poincon de longueur adaptable, et procede de fabrication correspondant.
PCT/FR2006/050990 WO2007039703A1 (fr) 2005-10-04 2006-10-04 Outillage de fabrication d'une traverse a section fermee comprenant une matrice et/ou un poincon de longueur adaptable, et procede de fabrication correspondant

Publications (2)

Publication Number Publication Date
EP1933999A1 EP1933999A1 (de) 2008-06-25
EP1933999B1 true EP1933999B1 (de) 2009-09-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06820253A Not-in-force EP1933999B1 (de) 2005-10-04 2006-10-04 Einrichtung zur herstellung eines querträgers mit geschlossenem profil mit einer stanze und/oder matrize mit anpassbarer länge und entsprechendes herstellungsverfahren

Country Status (8)

Country Link
US (1) US20090071220A1 (de)
EP (1) EP1933999B1 (de)
JP (1) JP2009509774A (de)
AT (1) ATE444129T1 (de)
DE (1) DE602006009531D1 (de)
FR (1) FR2891480B1 (de)
PL (1) PL1933999T3 (de)
WO (1) WO2007039703A1 (de)

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DE602008004653D1 (de) * 2008-08-07 2011-03-03 Giannoni S P A Bithermaler Wärmetauscher und seine Herstellung
NL2002482C2 (en) * 2009-02-03 2010-08-04 Weweler Nv Manufacturing of a vehicle axle.
JP4858624B2 (ja) * 2009-04-01 2012-01-18 Ｊｆｅスチール株式会社 トーションビームの製造方法及びトーションビーム
KR101009494B1 (ko) 2010-05-20 2011-01-19 이형광 자동차의 크로스멤버용 컵의 제조방법
KR20140121828A (ko) * 2012-02-01 2014-10-16 마그나 인터내셔널 인코포레이티드 횡단 지주 및 횡단 지주 성형 방법
US9884359B2 (en) * 2012-06-15 2018-02-06 Magna International Inc. Adjustable twist beam tube forming die
CN103736832B (zh) * 2013-12-30 2015-12-09 四川蓝星机械有限公司 一种扁圆管成型装置及其制造方法
DE102014109453A1 (de) * 2014-07-07 2016-01-07 Benteler Automobiltechnik Gmbh Verfahren zum Herstellen eines Torsionsprofils aus einem rohrförmigen Hohlprofil sowie Torsionsprofil
DE102015122507A1 (de) * 2015-12-22 2017-06-22 Familie Burger GbR (vertretungsberechtigte Gesellschafter: Mercedes Burger, 87484 Nesselwang; Georg Burger, 87484 Nesselwang; Bernhard Burger, 87484 Nesselwang; Manuel Burger, 87484 Nesselwang; Christina Burger, 87484 Nesselwang; Diana Burger, 87484 Nesselwang) Verfahren und Vorrichtung zur Herstellung eines Hinterachsträgers für ein Kraftfahrzeug
MX2018010462A (es) * 2016-03-30 2019-01-14 Nippon Steel & Sumitomo Metal Corp Metodo de fabricacion de barra de torsion y aparato de fabricacion de barra de torsion.
CN109070676B (zh) * 2016-05-10 2022-03-01 日本制铁株式会社 扭力梁制造方法、扭力梁制造装置以及扭力梁
DE102017110096B4 (de) * 2017-05-10 2024-02-08 Benteler Automobiltechnik Gmbh Verfahren und Vorrichtung zum Herstellen eines hülsenförmigen Durchzugs
WO2019069631A1 (ja) * 2017-10-04 2019-04-11 新日鐵住金株式会社 トーションビーム製造方法及びトーションビーム製造装置

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Also Published As

Publication number Publication date
ATE444129T1 (de) 2009-10-15
EP1933999A1 (de) 2008-06-25
FR2891480A1 (fr) 2007-04-06
PL1933999T3 (pl) 2010-07-30
FR2891480B1 (fr) 2008-04-04
JP2009509774A (ja) 2009-03-12
US20090071220A1 (en) 2009-03-19
WO2007039703A1 (fr) 2007-04-12
DE602006009531D1 (de) 2009-11-12

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