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WO2002087798A1 - Method for separating sections during extrusion - Google Patents

Method for separating sections during extrusion Download PDF

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Publication number
WO2002087798A1
WO2002087798A1 PCT/DE2002/001409 DE0201409W WO02087798A1 WO 2002087798 A1 WO2002087798 A1 WO 2002087798A1 DE 0201409 W DE0201409 W DE 0201409W WO 02087798 A1 WO02087798 A1 WO 02087798A1
Authority
WO
WIPO (PCT)
Prior art keywords
extrusion
cut
burner
length
cutting
Prior art date
Application number
PCT/DE2002/001409
Other languages
German (de)
French (fr)
Inventor
Alf Birkenstock
Klaus Jakoby
Uwe Quitmann
Original Assignee
Sms Eumuco Gmbh
WKW Erbslöh Automotive 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 Sms Eumuco Gmbh, WKW Erbslöh Automotive GmbH filed Critical Sms Eumuco Gmbh
Priority to AT02740259T priority Critical patent/ATE302657T1/en
Priority to EP02740259A priority patent/EP1412105B1/en
Priority to DE50204040T priority patent/DE50204040D1/en
Publication of WO2002087798A1 publication Critical patent/WO2002087798A1/en

Links

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
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • 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

Definitions

  • the invention relates to a method for cutting off partial lengths in the extrusion of rounded or curved extruded products, the molded product being formed in a die upstream of a counter beam of an extrusion press and then being bent or bent by the action of external forces.
  • the invention has for its object to provide a method of the type mentioned, with which partial lengths desired for the extruded product can be separated without disadvantage.
  • the extruded product be cut to length by flame cutting.
  • a burner medium of different gas compositions and mixing ratios can advantageously be used here.
  • the usual gases, such as oxygen, acetylene, propane, butane, natural gas, etc., and mixtures thereof are to be regarded as suitable.
  • a preferred further proposal provides that the pressed product is cut to length in the production flow by plasma cutting.
  • short cycle times during cutting can be achieved with the above-mentioned burner inserts, which makes it possible to set a defined material state and the economy of extrusion (extrusion speed) accordingly.
  • the time required for dividing the extruded extruded profile can be reduced, for example by torch heads moving towards each other from both extruded profile sides.
  • the burner head - or the burner heads - is positioned as close as possible to the extruded product, an optimized efficiency can be achieved with regard to the cutting time and the quality of the cutting cut. It is within the scope of the method according to the invention to adapt or design the burner head from the outset, depending on the component profile, in such a way that it is acted upon across the entire profile.
  • Another proposal of the invention provides that the burner head - arranged in the starting position behind the rounding tool - is positioned by a robot during the cutting process in accordance with the current rounding radius of the extruded product.
  • the robot which is controlled by the superordinate computer, which is present in any case on an extrusion system, also allows high Extrusion speeds and large extrusion cross sections, the robot guides the burner head in the extrusion direction in order to separate the profile at a defined point.
  • the burner head is placed on a linear axis - e.g. arranged on the rounding tool - guided and impulsed with gas.
  • the surge-like gas admission supports that the profile is separated in the shortest possible time.
  • a pulse is triggered on the burner unit when a control circuit passes a marker. As soon as the mark is reached, e.g. pneumatically caused, the profile with the release medium.
  • the contact-free cutting according to the invention ensures that desired partial lengths can be achieved quickly and exactly without adverse effects on the profile rounded in the plastic area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

The invention relates to a method for separating sections during the extrusion of rounded or bent extrusion products. According to said method, the extrusion product is shaped in a die that is mounted upstream of a crosshead of an extrusion installation, and is then curved or bent by the action of external forces. The extrusion product is cut to size during the course of the extrusion without mechanical compression in a contactless manner.

Description

Verfahren zum Abtrennen von Teillängen beim StrangpressenProcess for cutting off partial lengths during extrusion
Die Erfindung betrifft ein Verfahren zum Abtrennen von Teillängen beim Strangpressen von gerundeten bzw. gekrümmten Strangpreßprodukten, wobei das Preßprodukt in einer einem Gegenholm einer Strangpreßaniage vorgelagerten Matrize geformt und anschließend durch Einwirken äußerer Kräfte gekrümmt bzw. abgebogen wird.The invention relates to a method for cutting off partial lengths in the extrusion of rounded or curved extruded products, the molded product being formed in a die upstream of a counter beam of an extrusion press and then being bent or bent by the action of external forces.
Zur Herstellung von in verschiedensten industriellen Bereichen zu unterschiedlichsten Zwecken benötigten gerundeten Strangpreßprofilen, die vorrangig aus Aluminium und Magnesiumlegierungen bestehen, ist es für das Strangpressen von Hohlprodukten mit großen Wanddickenunterschieden durch die EP 0 706 843 B1 bekanntgeworden, in einem solch bestimmten Abstand vom Matrizenaustrittsende bzw. Gegenholm mit einem Druckmittel (Führungswerkzeug) eine Kraft auf den Strang auszuüben, daß sich eine Rückwirkung auf das in der Strangpreßmatrize geformte Profil ergibt. Bei dem Druckmittel kann es sich um eine Rolle, eine Querkraft erzeugende Gleitfläche, einen Rollenkäfig oder dergleichen Werkzeug handeln. Die Umformung des Strangpreßprofiles erfolgt hinter dem Strangpreßwerkzeug im plastischen Bereich des Werkstoffes.For the production of rounded extrusion profiles, which consist primarily of aluminum and magnesium alloys, and which are required for a wide variety of industrial purposes, it has become known for the extrusion of hollow products with large wall thickness differences from EP 0 706 843 B1, at such a specific distance from the die exit end or To exert a force on the strand against the counter beam with a pressure medium (guide tool), so that there is a reaction to the profile formed in the extrusion die. The pressure medium can be a roller, a sliding surface generating a lateral force, a roller cage or the like tool. The extrusion profile is formed behind the extrusion tool in the plastic area of the material.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit dem sich ohne Nachteil für das Strangpreßprodukt gewünschte Teillängen abtrennen lassen.The invention has for its object to provide a method of the type mentioned, with which partial lengths desired for the extruded product can be separated without disadvantage.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Strangpreßprodukt im Pressenfluß unter Ausschaltung mechanischer Beanspruchung berührungsfrei abgelängt wird. Hiermit läßt sich erreichen, daß beim Trennvorgang keine äußeren Kräfte auf das Strangpreßprodukt einwirken können, die ansonsten ein außerordentlich nachteiliges Moment auf das Bauteil im plastischen Bereich ausüben würden. Mit dem erfindungsgemäß berührungsfreien Ablängen läßt sich vermeiden, daß der Rundungsradius des Strangpreßproduktes so stark beeinflußt wird, daß die Konturgenauigkeit schwankt und das Strangpreßprofil dann nur mit einem nachfolgenden, zusätzlichen Arbeitsgang, z.B. Kalibrieren durch Innenhochdruck- umformen, in die gewünschte Endkontur gebracht werden könnte.This object is achieved in that the extruded product is cut to length in the press flow without mechanical stress. It can be achieved in this way that no external forces can act on the extruded product during the cutting process, which would otherwise exert an extremely disadvantageous moment on the component in the plastic region. With the non-contact cutting to length according to the invention it can be avoided that the rounding radius of the extruded product is influenced so strongly that the contour accuracy fluctuates and the extruded profile then only with one subsequent, additional work step, for example calibration by hydroforming, could be brought into the desired final contour.
Nach einer Ausgestaltung der Erfindung wird vorgeschlagen, daß das Strangpreßprodukt durch Brennschneiden abgelängt wird. Hierbei läßt sich vorteilhaft ein Brennermedium aus unterschiedlichen Gaszusammensetzungen und Mischungsverhältnissen verwenden. Als geeignet sind die üblichen Gase anzusehen, wie Sauerstoff, Acetylen, Propan, Butan, Erdgas, etc. und deren Gemischen.According to one embodiment of the invention, it is proposed that the extruded product be cut to length by flame cutting. A burner medium of different gas compositions and mixing ratios can advantageously be used here. The usual gases, such as oxygen, acetylene, propane, butane, natural gas, etc., and mixtures thereof are to be regarded as suitable.
Ein bevorzugter weiterer Vorschlag sieht vor, daß das ausgepreßte Produkt im Fertigungsfluß durch Plasmaschneiden abgelängt wird. In jedem Fall lassen sich bei den genannten Brennereinsätzen kurze Taktzeiten beim Trennen verwirklichen, was es ermöglicht, einen definierten Werkstoffzustand und die Wirtschaftlichkeit des Strangpressens (Strangpreßgeschwindigkeit) entsprechend einzustellen.A preferred further proposal provides that the pressed product is cut to length in the production flow by plasma cutting. In any case, short cycle times during cutting can be achieved with the above-mentioned burner inserts, which makes it possible to set a defined material state and the economy of extrusion (extrusion speed) accordingly.
Wenn vorteilhaft mit mehreren Brennerköpfen gleichzeitig abgelängt wird, was sowohl beim autogenen Brennschneiden als auch beim Plasmaschneiden möglich ist, läßt sich die für das Unterteilen des ausgepreßten Strangprofils benötigte Zeit verringern, beispielsweise durch von beiden Strangprofilseiten her aufeinander- zufahrende Brennerköpfe.If it is advantageous to cut to length with several torch heads at the same time, which is possible both with oxy-fuel cutting and with plasma cutting, the time required for dividing the extruded extruded profile can be reduced, for example by torch heads moving towards each other from both extruded profile sides.
Wenn der Brennerkopf - bzw.die Brennerköpfe - so nah wie möglich an das Strangpreßprodukt positioniert wird, läßt sich hinsichtlich der Trennzeit und der Qualität des Trennschnittes ein optimierter Wirkungsgrad erreichen. Es liegt hierbei im Rahmen des erfindungsgemäßen Verfahrens, den Brennerkopf je nach Bauteilprofil von vornherein so anzupassen bzw. auszulegen, daß eine flächendeckende Beaufschlagung über das gesamte Profil gewährleistet wird.If the burner head - or the burner heads - is positioned as close as possible to the extruded product, an optimized efficiency can be achieved with regard to the cutting time and the quality of the cutting cut. It is within the scope of the method according to the invention to adapt or design the burner head from the outset, depending on the component profile, in such a way that it is acted upon across the entire profile.
Ein weiterer Vorschlag der Erfindung sieht vor, daß der - in der Ausgangslage hinter dem Rundungswerkzeug angeordnete - Brennerkopf beim Trennvorgang von einem Roboter entsprechend dem aktuellen Rundungsradius des Strangpreßproduktes positioniert wird. Der von dem an einer Strangpreßanlage ohnehin vorhandenen übergeordneten Rechner gesteuerte Roboter erlaubt es zudem, daß bei hohen Strangpreßgeschwindigkeiten und großen Strangpreßquerschnitten der Roboter den Brennerkopf in Strangpreßrichtung führt, um das Profil somit an einer definierten Stelle zu trennen.Another proposal of the invention provides that the burner head - arranged in the starting position behind the rounding tool - is positioned by a robot during the cutting process in accordance with the current rounding radius of the extruded product. The robot, which is controlled by the superordinate computer, which is present in any case on an extrusion system, also allows high Extrusion speeds and large extrusion cross sections, the robot guides the burner head in the extrusion direction in order to separate the profile at a defined point.
Nach einer Alternative wird der Brennkopf auf einer Linearachse - z.B. angeordnet auf dem Rundungswerkzeug - geführt und stoßartig mit Gas beaufschlagt. Die stoßartige Gasbeaufschlagung unterstützt es, daß das Profil in kürzester Zeit getrennt wird.According to an alternative, the burner head is placed on a linear axis - e.g. arranged on the rounding tool - guided and impulsed with gas. The surge-like gas admission supports that the profile is separated in the shortest possible time.
Nach einer anderen Maßnahme der Erfindung kann vorgesehen werden, daß beim Überfahren einer Markierung durch einen Regelkreis ein Impuls auf das Brenneraggregat ausgelöst wird. Sofort beim Erreichen der Markierung wird damit, z.B. pneumatisch veranlaßt, das Profil mit dem Trennmedium beaufschlagt.According to another measure of the invention, it can be provided that a pulse is triggered on the burner unit when a control circuit passes a marker. As soon as the mark is reached, e.g. pneumatically caused, the profile with the release medium.
Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus den Ansprüchen. Auf jeden Fall wird mit dem erfindungsgemäßen berührungsfreien Trennen sichergestellt, daß gewünschte Teillängen schnell und exakt ohne nachteilige Einwirkungen auf das im plastischen Bereich gerundete Profil erreicht werden können. Further features and details of the invention emerge from the claims. In any case, the contact-free cutting according to the invention ensures that desired partial lengths can be achieved quickly and exactly without adverse effects on the profile rounded in the plastic area.

Claims

Patentansprüche: claims:
1. Verfahren zum Abtrennen von Teillängen beim Strangpressen von gerundeten bzw. gekrümmten Strangpreßprodukten, wobei das Preßprodukt in einer einem Gegenholm einer Strangpreßanlage vorgelagerten Matrize geformt und anschließend durch Einwirken äußerer Kräfte gekrümmt bzw. abgebogen wird, dadurch gekennzeichnet, daß das Strangpreßprodukt im Pressenfluß unter Ausschaltung mechanischer Beanspruchung berührungsfrei abgelängt wird.1. A method for cutting off partial lengths in the extrusion of rounded or curved extruded products, the molded product being formed in a die upstream of a counter beam of an extrusion system and then being bent or bent by the action of external forces, characterized in that the extruded product is switched off in the press flow mechanical stress is cut to length without contact.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß das Strangpreßprodukt durch Brennschneiden abgelängt wird.2. The method according to claim 1, characterized in that the extruded product is cut to length by flame cutting.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Brennermedium aus unterschiedlichen Gaszusammensetzungen und Mischungsverhältnissen verwendet wird.3. The method according to claim 1 or 2, characterized in that a burner medium from different gas compositions and mixing ratios is used.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß durch Plasmaschneiden abgelängt wird.4. The method according to any one of claims 1 to 3, characterized in that it is cut to length by plasma cutting.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mit mehreren Brennerköpfen gleichzeitig abgelängt wird.5. The method according to any one of claims 1 to 4, characterized in that it is cut to length with several burner heads.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Brennerkopf so nah wie möglich an das Strangpreßprodukt positioniert wird. 6. The method according to any one of claims 1 to 5, characterized in that the burner head is positioned as close as possible to the extruded product.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Brennerkopf von einem Roboter entsprechend dem aktuellen Rundungsradius des Strangpreßproduktes positioniert wird.7. The method according to any one of claims 1 to 6, characterized in that the burner head is positioned by a robot according to the current radius of curvature of the extruded product.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Brennerkopf auf einer Linearachse geführt und stoßartig mit Gas beaufschlagt wird.8. The method according to any one of claims 1 to 7, characterized in that the burner head is guided on a linear axis and is acted upon abruptly with gas.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß beim Überfahren einer Markierung durch einen Regelkreis ein Impuls auf das Brenneraggregat ausgelöst wird. 9. The method according to claim 8, characterized in that a pulse is triggered on the burner unit when a marker is passed by a control loop.
PCT/DE2002/001409 2001-04-27 2002-04-17 Method for separating sections during extrusion WO2002087798A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT02740259T ATE302657T1 (en) 2001-04-27 2002-04-17 METHOD FOR SEPARATING PARTIAL LENGTHS DURING EXTRUSION
EP02740259A EP1412105B1 (en) 2001-04-27 2002-04-17 Method for separating sections during extrusion
DE50204040T DE50204040D1 (en) 2001-04-27 2002-04-17 METHOD FOR REMOVING PARTIAL RANGES IN EXTRUSION PRESSURE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10120953A DE10120953A1 (en) 2001-04-27 2001-04-27 Process for cutting off partial lengths during extrusion
DE10120953.3 2001-04-27

Publications (1)

Publication Number Publication Date
WO2002087798A1 true WO2002087798A1 (en) 2002-11-07

Family

ID=7683118

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Application Number Title Priority Date Filing Date
PCT/DE2002/001409 WO2002087798A1 (en) 2001-04-27 2002-04-17 Method for separating sections during extrusion

Country Status (4)

Country Link
EP (1) EP1412105B1 (en)
AT (1) ATE302657T1 (en)
DE (2) DE10120953A1 (en)
WO (1) WO2002087798A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241028B3 (en) * 2002-09-05 2004-07-29 Erbslöh Ag Process for the production of curved (rounded) structural components from an extruded profile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040235A1 (en) * 1980-10-24 1982-05-06 Friedrich Wilhelm Dipl.-Ing. 5600 Wuppertal Elhaus Extruded section separator - where section esp. of aluminium (alloy) is heated locally, and separated by tensile force
US5305626A (en) * 1992-01-24 1994-04-26 Reynolds Aluminium Holland B.V. Extrusion method and extrusion apparatus
US5484981A (en) * 1994-08-24 1996-01-16 Honda Giken Kogyo Kabushiki Kaisha Method of cutting a hollow metallic material
EP0706843A1 (en) * 1994-08-17 1996-04-17 VAW Aluminium AG Method and device for the production of curved workpieces
US5927129A (en) * 1997-04-23 1999-07-27 Daimler-Benz Aktiengesellschaft Apparatus and process for making cut extruded hollow profiles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040235A1 (en) * 1980-10-24 1982-05-06 Friedrich Wilhelm Dipl.-Ing. 5600 Wuppertal Elhaus Extruded section separator - where section esp. of aluminium (alloy) is heated locally, and separated by tensile force
US5305626A (en) * 1992-01-24 1994-04-26 Reynolds Aluminium Holland B.V. Extrusion method and extrusion apparatus
EP0706843A1 (en) * 1994-08-17 1996-04-17 VAW Aluminium AG Method and device for the production of curved workpieces
US5484981A (en) * 1994-08-24 1996-01-16 Honda Giken Kogyo Kabushiki Kaisha Method of cutting a hollow metallic material
US5927129A (en) * 1997-04-23 1999-07-27 Daimler-Benz Aktiengesellschaft Apparatus and process for making cut extruded hollow profiles

Also Published As

Publication number Publication date
DE50204040D1 (en) 2005-09-29
EP1412105B1 (en) 2005-08-24
ATE302657T1 (en) 2005-09-15
EP1412105A1 (en) 2004-04-28
DE10120953A1 (en) 2002-10-31

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