EP1169146B1 - Method and device for producing curved extruded profiles - Google Patents

Method and device for producing curved extruded profiles Download PDF

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Publication number
EP1169146B1
EP1169146B1 EP01907516A EP01907516A EP1169146B1 EP 1169146 B1 EP1169146 B1 EP 1169146B1 EP 01907516 A EP01907516 A EP 01907516A EP 01907516 A EP01907516 A EP 01907516A EP 1169146 B1 EP1169146 B1 EP 1169146B1
Authority
EP
European Patent Office
Prior art keywords
die
extrusion
tool
mandrel
tool holder
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
EP01907516A
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German (de)
French (fr)
Other versions
EP1169146A1 (en
Inventor
Matthias Kleiner
Dieter Arendes
Alexander Klaus
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.)
WKW Engineering GmbH
Original Assignee
WKW Erbsloeh Automotive GmbH
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Filing date
Publication date
Application filed by WKW Erbsloeh Automotive GmbH filed Critical WKW Erbsloeh Automotive GmbH
Publication of EP1169146A1 publication Critical patent/EP1169146A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/12—Extruding bent tubes or rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • the invention relates to a method and a Device for the production of curved workpieces, the workpiece in the die of an extrusion press is formed and this in the strand exit direction leaves (see e.g. US-A-5 305 626).
  • Curved aluminum profiles are in different areas of technology used, especially in rail, road and Aircraft industry. These workpieces become conventional by straight extrusion followed by Stretch bending manufactured.
  • the object of the present invention is with as little effort as possible also with smaller radii Allow extrusion curving and to expand the product range to be manufactured.
  • an extrusion device for Production of curved workpieces with one Tool holder, in its opening Press tool package consisting of a die with or is arranged without a mandrel and a cover provided that those producing the emerging strand Guide surfaces of the die and / or mandrel accordingly the strand exit direction is inclined or are arranged, and that the strand exit direction in an angle of attack to the central axis of the die runs against the later curvature of the workpiece.
  • the conventional press tool package consists of a Die 1, a mandrel part 2 with mandrel 4 and on both sides Guide surfaces 3 between the mandrel 4 and the die 1.
  • arrow A is the exit direction of the Extruded profile called the conventional extrusion press (Fig. 1) with the The central axis M of the die 1 coincides.
  • the basic idea of the present invention namely the Strand exit direction A opposite to the later Curvature of the workpiece by an angle of attack S can be inclined relative to the center line M, can be achieved in different ways.
  • the guide surfaces 3 of die 1 are located and mandrel 4 obliquely with respect to the central axis M of the Die 1.
  • the arrow A in FIG. 2 therefore indicates the desired oblique strand exit direction at the against the later curvature of the workpiece W (dotted line in Fig. 3).
  • the slope Guide surface 3 can be through on the mandrel side appropriate processing of the mandrel 4 or by the Realize inclination.
  • FIG. 3 shows the present invention conventional tool holder 6 a modified Press tool, consisting of a die 1 and a Mandrel part 2 shown.
  • the modification exists in that the pressing tool on the circumference accordingly the angle of attack S has oblique flats, so that it is in conjunction with a wedge-shaped backing 7 obliquely into the receiving opening 9 of the tool holder 6 can be used.
  • a wedge-shaped backing 7 obliquely into the receiving opening 9 of the tool holder 6 can be used.
  • the variant of the shown in Figure 4 basic idea according to the invention shows a pressing device with an inclined in the tool holder 6 Receiving opening 9 in which a conventional Press tool is used. This is about a conventional cover 8 held the die 1 and the mandrel part 2 against the front of the obliquely in Tool holder 6 pushing receiving opening 9 presses. If appropriate, combinations of alternatives explained above are selected, where, for example, inclined guide surfaces 3 one inserted obliquely by the angle of attack S. Press tool or beveled peripheral sides of the Die 1 or the mandrel part 2 with an oblique extending receiving opening 9 can be combined can. It should always be noted that the Strand exit direction A opposite to oblique later curvature of the workpiece.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

In a method for producing curved work pieces, an extruded profile leaves the die of an extruder in the strand discharge direction and is then bent into a curved shape by external forces. The extruded profile that leaves the die, before being bent, is deflected so that the strand discharge direction extends forwards at an angle counter to the eventual curvature of the work piece. To this end, the die comprises a tool holder in whose receiving opening an extrusion tool package consisting of a die with or without a mandrel and a cover part is disposed. The guide surfaces of the die and/or of the mandrel that produce the discharged strand are designed or disposed to be at an angle with respect to the strand discharge direction which extends at an incline with respect to the center axis of the die counter to the eventual curvature of the work piece.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von gekrümmten Werkstücken, wobei das Werkstück in der Matrize einer Strangpresse geformt wird und diese in Strangaustrittsrichtung verläßt (siehe z.B. US-A-5 305 626).The invention relates to a method and a Device for the production of curved workpieces, the workpiece in the die of an extrusion press is formed and this in the strand exit direction leaves (see e.g. US-A-5 305 626).

Gekrümmte Aluminiumprofile werden in unterschiedlichsten Bereichen der Technik eingesetzt, insbesondere im Schienen-, Straßen- und Luftfahrzeugbau. Konventionell werden diese Werkstücke durch gerades Strangpressen mit anschließendem Streckbiegen gefertigt.Curved aluminum profiles are in different areas of technology used, especially in rail, road and Aircraft industry. These workpieces become conventional by straight extrusion followed by Stretch bending manufactured.

Eine Weiterentwicklung dieses Verfahrens sieht vor, die gewünschte Endkontur durch Biegen praktisch gleichzeitig mit dem Strangpressen zu erzeugen (sh. EP 0706843 A1). Dabei wird mit herkömmlichen Strangpressen gearbeitet, wobei üblicherweise ein Querhaupt als Gegenhalter mit kleiner Öffnung zur Abstützung der Matrize verwendet wird.A further development of this procedure provides that desired final contour by bending practically to be produced simultaneously with the extrusion (see EP 0706843 A1). This is done with conventional Extrusion worked, usually a Crosshead as a counterholder with a small opening for Support the die is used.

Soll das Strangpreßprofil beim Biegen nahe dem Preßwerkzeug gerundet werden, so beschränkt die Geometrie des Pressenauslaufes den minimal zu erzeugenden Radius. Sonst käme es zu einer Kollision des Strangs mit der Presse. Hierdurch wird die mögliche Produktvielfalt stark eingeschränkt. Should the extruded profile close to the when bending Press tool are rounded, so the limits Geometry of the press outlet to the minimal generating radius. Otherwise there would be a collision of the strand with the press. This will make the possible Product variety severely restricted.

Aufgabe der vorliegenden Erfindung ist es, mit möglichst geringem Aufwand auch engere Radien beim Krümmen von Strangpreßerzeugnissen zu ermöglichen und damit das zu fertigende Produktspektrum zu erweitern.The object of the present invention is with as little effort as possible also with smaller radii Allow extrusion curving and to expand the product range to be manufactured.

Diese Aufgabe wird nach einem erfindungsgemäßen Verfahren dadurch gelöst, daß das Strangpreßprofil beim Austritt aus der Matrize vor dem Biegen derart abgelenkt wird, daß die Strangaustrittsrichtung (A) schräg nach vorne entgegen der späteren Krümmung des Werkstücks verläuft. Der zunächst schräg aus dem Preßwerkzeug austretender Strang ist dabei so ausgerichtet, daß er durch eine nachfolgende Biegung zur anderen Seite hin eine wesentlich stärkere Krümmung erfahren kann.This object is achieved according to the invention Process solved in that the extruded profile at Exit from the die before bending like this is deflected that the strand exit direction (A) diagonally forward against the later curvature of the Workpiece runs. The first at an angle from the Press tool emerging strand is like this aligned that he was through a subsequent bend on the other hand a much stronger curvature can experience.

Bei einer erfindungsgemäßen Strangpreßvorrichtung zur Herstellung von gekrümmte Werkstücken mit einem Werkzeughalter, in dessen Aufnahmeöffnung ein Preßwerkzeugpaket bestehend aus einer Matrize mit oder ohne Dorn und einem Abdeckteil angeordnet ist, ist vorgesehen, daß die den austretenden Strang erzeugenden Führungsflächen von Matrize und/oder Dorn entsprechend der Strangaustrittsrichtung schräg ausgebildet bzw. angeordnet sind, und daß die Strangaustrittsrichtung in einem Anstellwinkel zur Mittelachse der Matrize entgegen der späteren Krümmung des Werkstücks verläuft.In an extrusion device according to the invention for Production of curved workpieces with one Tool holder, in its opening Press tool package consisting of a die with or is arranged without a mandrel and a cover provided that those producing the emerging strand Guide surfaces of the die and / or mandrel accordingly the strand exit direction is inclined or are arranged, and that the strand exit direction in an angle of attack to the central axis of the die runs against the later curvature of the workpiece.

Die Veränderung der Strangaustrittsrichtung wird alternativ erreicht durch

  • Schrägstellung der Führungsflächen der Matrize und ggf. des Dorns,
  • Einbau eines konventionellen Preßwerkzeuges in einem modifizierten Werkzeughalter und/oder durch
  • Einbau eines schräg abgeflachten Preßwerkzeuges in einen konventionellen Werkzeughalter.
The change in the strand exit direction is alternatively achieved by
  • Inclination of the guide surfaces of the die and, if applicable, the mandrel,
  • Installation of a conventional pressing tool in a modified tool holder and / or by
  • Installation of an obliquely flattened pressing tool in a conventional tool holder.

Im folgenden wird ein konventionelles Preßwerkzeugpaket beschrieben (Fig. 1) und die Erfindung anhand mehrerer Ausführungsbeispiele näher erläutert. Die Figuren 2 - 4 zeigen jeweils Ausschnitte verschiedener alternativen Lösungsmöglichkeiten zur Herstellung gekrümmter Strangpreßprofile:

Fig. 1
Konventionelles Preßwerkzeug nach dem Stand der Technik;
Fig. 2
erfindungsgemäß ausgebildete Preßvorrichtung mit schrägen Führungsflächen und schräg angeordnetem Dorn;
Fig. 3
erfindungsgemäß ausgebildete Preßvorrichtung mit schrägem Preßwerkzeug in einem konventionellen Werkzeughalter;
Fig. 4
erfindungsgemäß ausgebildete Preßvorricihtung mit schräg ausgebildetem Werkzeughalter und konventionellem Preßwerkzeug.
A conventional press tool package is described below (FIG. 1) and the invention is explained in more detail with reference to several exemplary embodiments. FIGS. 2-4 each show sections of different alternative solutions for the production of curved extruded profiles:
Fig. 1
Conventional pressing tool according to the prior art;
Fig. 2
Press device designed according to the invention with oblique guide surfaces and obliquely arranged mandrel;
Fig. 3
Press device designed according to the invention with an oblique pressing tool in a conventional tool holder;
Fig. 4
Press device designed according to the invention with an obliquely designed tool holder and conventional pressing tool.

Das konventionelle Preßwerkzeugpaket besteht aus einer Matrize 1, einem Dornteil 2 mit Dorn 4 und beidseitigen Führungsflächen 3 zwischen dem Dorn 4 und der Matrize 1. Mit dem Pfeil A ist die Austrittsrichtung des Strangpreßprofils bezeichnet, die bei der konventionellen Strangpresse (Fig. 1) mit der Mittelachse M der Matrize 1 zusammenfällt.The conventional press tool package consists of a Die 1, a mandrel part 2 with mandrel 4 and on both sides Guide surfaces 3 between the mandrel 4 and the die 1. With the arrow A is the exit direction of the Extruded profile called the conventional extrusion press (Fig. 1) with the The central axis M of the die 1 coincides.

Die Grundidee der vorliegenden Erfindung, nämlich die Strangaustrittsrichtung A entgegengesetzt zur späteren Krümmung des Werkstücks um einen Anstellwinkel S gegenüber der Mittellinie M schräg anzustellen, kann auf verschiedene Weise erreicht werden. Im Querschnitt nach Figur 2 liegen die Führungsflächen 3 von Matrize 1 und Dorn 4 schräg in bezug auf die Mittelachse M der Matrize 1. Der Pfeil A gibt also in Figur 2 die gewünscht schräge Strangaustrittsrichtung an, die entgegen der späteren Krümmung des Werkstücks W (punktierte Linie in Fig. 3) verläuft. Die schräge Führungsfläche 3 läßt sich dornseitig durch entsprechende Bearbeitung des Dorns 4 oder durch dessen Schrägstellung verwirklichen.The basic idea of the present invention, namely the Strand exit direction A opposite to the later Curvature of the workpiece by an angle of attack S can be inclined relative to the center line M, can be achieved in different ways. In cross section 2, the guide surfaces 3 of die 1 are located and mandrel 4 obliquely with respect to the central axis M of the Die 1. The arrow A in FIG. 2 therefore indicates the desired oblique strand exit direction at the against the later curvature of the workpiece W (dotted line in Fig. 3). The slope Guide surface 3 can be through on the mandrel side appropriate processing of the mandrel 4 or by the Realize inclination.

Eine weitere alternative Lösungsmöglichkeit zur Herstellung gekrümmter Strangpreßprofile gemäß der vorliegenden Erfindung zeigt Figur 3. Hier ist in einem konventionellen Werkzeughalter 6 ein modifiziertes Preßwerkzeug, bestehend aus einer Matrize 1 und einem Dornteil 2, dargestellt. Die Modifizierung besteht darin, daß das Preßwerkzeug umfangsseitig entsprechend dem Anstellwinkel S schräge Abflachungen aufweist, so daß es in Verbindung mit einer keilförmigen Hinterlage 7 schräg in die Aufnahmeöffnung 9 des Werkzeughalters 6 eingesetzt werden kann. Selbstverständlich ist auch ein entsprechend abgeschrägtes Abdeckteil 8 in die Aufnahmeöffnung 9 zur Abstützung des Dornteiles 2 eingesetzt, so daß die auf das Preßwerkzeug einwirkenden Kräfte im Werkzeughalter 6 aufgenommen werden können.Another alternative solution to Production of curved extruded profiles according to the FIG. 3 shows the present invention conventional tool holder 6 a modified Press tool, consisting of a die 1 and a Mandrel part 2 shown. The modification exists in that the pressing tool on the circumference accordingly the angle of attack S has oblique flats, so that it is in conjunction with a wedge-shaped backing 7 obliquely into the receiving opening 9 of the tool holder 6 can be used. Of course there is also a accordingly beveled cover 8 in the Receiving opening 9 for supporting the mandrel part 2 used so that on the press tool forces acting in the tool holder 6 can be.

Die in Figur 4 dargestellte Variante der erfindungsgemäßen Grundidee zeigt eine Preßvorrichtung mit einer im Werkzeughalter 6 schräg eingearbeiteten Aufnahmeöffnung 9, in der ein konventionelles Preßwerkzeug eingesetzt ist. Dieses wird über ein konventionelles Abdeckteil 8 gehalten, das die Matrize 1 und das Dornteil 2 gegen das Stirnende der schräg im Werkzeughalter 6 verlaufenden Aufnahmeöffnung 9 drückt. Falls es zweckmäßig ist, können auch Kombinationen der vorstehend erläuterten Alternativen gewählt werden, wobei beispielsweise schräge Führungsflächen 3 mit einem um den Anstellwinkel S schräg eingesetzten Preßwerkzeug oder abgeschrägte Umfangsseiten der Matrize 1 bzw. des Dornteiles 2 mit einer schräg verlaufenden Aufnahmeöffnung 9 kombiniert werden können. Dabei ist stets zu beachten, daß die Strangaustrittsrichtung A entgegengesetzt schräg zur späteren Krümmung des Werkstückes verläuft.The variant of the shown in Figure 4 basic idea according to the invention shows a pressing device with an inclined in the tool holder 6 Receiving opening 9 in which a conventional Press tool is used. This is about a conventional cover 8 held the die 1 and the mandrel part 2 against the front of the obliquely in Tool holder 6 pushing receiving opening 9 presses. If appropriate, combinations of alternatives explained above are selected, where, for example, inclined guide surfaces 3 one inserted obliquely by the angle of attack S. Press tool or beveled peripheral sides of the Die 1 or the mandrel part 2 with an oblique extending receiving opening 9 can be combined can. It should always be noted that the Strand exit direction A opposite to oblique later curvature of the workpiece.

Claims (5)

  1. Process for producing curved components, whereby an extruded section leaves the die (1) of an extrusion press in the direction of the extrusion exit and is then bent into a curve by the action of external forces, characterised in that the extruded section is deflected on leaving the die (1) before being bent, and in that the direction of the extrusion exit (A) runs obliquely forward against the subsequent bend of the component.
  2. Extruding device for making curved components, with a tool holder (6) in the locating opening of which an extrusion tool packet consisting of a die (1) with or without a mandrel (4) and a cover part (8) is arranged, characterised in that the guide faces (3) of the die (1) and/or the mandrel (4) are designed or arranged obliquely to suit the direction of the extrusion exit (A) and that the direction of the extrusion exit runs at an angle (5) to the centre axis (M) of the die (1) in relation to the subsequent bend of the component.
  3. Extruding device according to Claim 2, characterised in that the extrusion tool packet is fitted in a conventional tool holder (6) obliquely to suit the direction of the extrusion exit.
  4. Extruding device according to Claim 2, characterised in that the tool holder (6) has a locating opening (9) extending obliquely to suit the direction of the extrusion exit (A), into which an extruding tool of a conventional design is inserted.
  5. Extruding device according to Claim 3, characterised in that a wedge-shaped backing piece (7) is inserted into the locating opening (9) and the extruding tool packet is bevelled on the outside, to suit the direction of the extrusion exit (A).
EP01907516A 2000-02-10 2001-02-09 Method and device for producing curved extruded profiles Expired - Lifetime EP1169146B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10005903 2000-02-10
DE10005903 2000-02-10
PCT/EP2001/001415 WO2001058613A1 (en) 2000-02-10 2001-02-09 Method and device for producing curved extruded profiles

Publications (2)

Publication Number Publication Date
EP1169146A1 EP1169146A1 (en) 2002-01-09
EP1169146B1 true EP1169146B1 (en) 2004-05-06

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EP01907516A Expired - Lifetime EP1169146B1 (en) 2000-02-10 2001-02-09 Method and device for producing curved extruded profiles

Country Status (11)

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US (1) US6634200B2 (en)
EP (1) EP1169146B1 (en)
JP (1) JP3632002B2 (en)
AT (1) ATE265902T1 (en)
CA (1) CA2366497A1 (en)
DE (1) DE50102182D1 (en)
DK (1) DK1169146T3 (en)
ES (1) ES2220719T3 (en)
NO (1) NO318742B1 (en)
TW (1) TW558458B (en)
WO (1) WO2001058613A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110035B4 (en) * 2001-03-02 2005-05-04 Sms Eumuco Gmbh Outfeed device of an extrusion press
DE10236299A1 (en) * 2002-08-08 2004-02-19 Sms Eumuco Gmbh Extrusion press esp. for fabrication of curved products has two-part tool located in counter part for simpler bending
DE10311169A1 (en) * 2003-03-12 2004-09-23 Sms Eumuco Gmbh Arrangement for extruding curved extruded profiles has rotary table arranged in press output to receive curved profiles, shape in mold arranged, bent by external forces and cut into sub-lengths
DE10329697B3 (en) * 2003-07-02 2005-01-20 WKW Erbslöh Automotive GmbH Method for producing curved workpieces by extrusion and rounding
DE10329696B3 (en) * 2003-07-02 2005-03-03 WKW Erbslöh Automotive GmbH Method for producing a plurality of curved extruded profiles
DE10340772A1 (en) * 2003-09-02 2005-03-24 Sms Eumuco Gmbh Method and device for extruding curved extruded profiles
CN101905249B (en) * 2010-07-30 2012-01-04 长沙仲腾金属材料科技有限公司 Method and device for machining curved profiles in combination with online quenching temperature control in short flow

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US1789675A (en) * 1927-02-09 1931-01-20 Ig Farbenindustrie Ag Die extrusion method and apparatus
US2738873A (en) * 1953-12-22 1956-03-20 Schloemann Ag Manufacture of practically endless extrusion products
JPS5641013A (en) 1979-09-11 1981-04-17 Toyota Motor Corp Method and apparatus for straightening bend of extruded product
DE2943960C2 (en) * 1979-10-31 1985-03-21 Christian Zürich Ragettli Device for producing a pipe bend
JPS58184012A (en) 1982-04-21 1983-10-27 Sankyo Alum Ind Co Ltd Manufacture of curved profile
US4906171A (en) * 1988-06-17 1990-03-06 Gencorp Inc. Directed flow die assembly
NL9200138A (en) * 1992-01-24 1993-08-16 Reynolds Aluminium Bv EXTRUSION METHOD AND EXTRUSION DEVICE.
JP3452925B2 (en) * 1992-06-08 2003-10-06 ビーティージー・インターナショナル・リミテッド Improvement of continuous extrusion method and equipment
DE19716292C2 (en) * 1997-04-18 2001-02-01 Daimler Chrysler Ag Extrusion device
JP3643262B2 (en) * 1999-06-24 2005-04-27 独立行政法人科学技術振興機構 Extrusion processing method using die shift and apparatus therefor

Also Published As

Publication number Publication date
WO2001058613A1 (en) 2001-08-16
NO318742B1 (en) 2005-05-02
DE50102182D1 (en) 2004-06-09
US6634200B2 (en) 2003-10-21
NO20014914D0 (en) 2001-10-09
ES2220719T3 (en) 2004-12-16
JP2003522025A (en) 2003-07-22
EP1169146A1 (en) 2002-01-09
US20030094028A1 (en) 2003-05-22
TW558458B (en) 2003-10-21
ATE265902T1 (en) 2004-05-15
NO20014914L (en) 2001-11-27
JP3632002B2 (en) 2005-03-23
CA2366497A1 (en) 2001-08-16
DK1169146T3 (en) 2004-06-01

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