EP1392457A1 - Method for cutting extruded profile sections - Google Patents

Method for cutting extruded profile sections

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Publication number
EP1392457A1
EP1392457A1 EP03714774A EP03714774A EP1392457A1 EP 1392457 A1 EP1392457 A1 EP 1392457A1 EP 03714774 A EP03714774 A EP 03714774A EP 03714774 A EP03714774 A EP 03714774A EP 1392457 A1 EP1392457 A1 EP 1392457A1
Authority
EP
European Patent Office
Prior art keywords
extruded profile
saw
cut
profile
length
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.)
Granted
Application number
EP03714774A
Other languages
German (de)
French (fr)
Other versions
EP1392457B1 (en
Inventor
Alf Birkenstock
Markus Jandewerth
Paul Hinzmann
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 EP1392457A1 publication Critical patent/EP1392457A1/en
Application granted granted Critical
Publication of EP1392457B1 publication Critical patent/EP1392457B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to a method for cutting an extrusion profile to length in the press flow of an extrusion device. More specifically, it relates to a method for cutting an extruded profile to length, which is bent after the press exit simultaneously with or immediately after the shaping extrusion process by a force acting transversely to the extrusion direction on the extruded profile, a force component being used as a tensile or compressive force when the mold is given! the extrusion process acts on the cross-sectional area of the resulting profile walls.
  • Profiled workpieces are often manufactured industrially on the basis of profiles formed by extrusion of semi-finished products. Depending on the material used for the semi-finished product, the extrusion is carried out at a temperature which guarantees the plastic deformability. For example, aluminum or magnesium alloys are generally pressed at temperatures from 250 ° C to 600 ° C. For further processing of the extruded profiles, these must be cut to length according to the respective dimensions of the profiled workpieces to be produced. Mechanical cutting tools such as saws or scissors are mainly used for cutting to length.
  • profiles in particular are subjected to at least one further process step for calibrating the final contour of the profiles, for which purpose conventional straightening devices are generally used. If the release agent causes contour inaccuracies during the cutting process, these are eliminated during straightening.
  • Typical lengths of profile sections cut to length lie in the range of 30 to 50 meters in the case of straight profiles in order to keep the material losses of approximately 1 to 2 meters that occur with straightening relatively low due to the clamping of the profile section.
  • the object of the present invention is to show a method of the type mentioned at the outset, with which the still warm extruded profile can be cut to length in the press flow without fear of deformation of the profile.
  • a method for cutting a hollow extruded profile in the press flow is shown, which method is characterized in that the bent extruded profile is cut to length in the press flow by the mechanical action of a saw, the force exerted on the extruded profile by cutting to a force by the extruded profile adjacent support device is compensated in such a way that deformation of the bent extruded profile is avoided, the extruded profile consisting of an aluminum alloy or a magnesium alloy and, when cut to length, has a temperature in the range from 200 ° C. to 600 ° C., preferably 500 ° C. to 600 ° C. ,
  • an extruded profile is considered here, which is bent after the press exit at the same time as or immediately after the shaping extrusion process by a force acting transversely to the extrusion direction on the extruded profile, a force component as a tensile or compressive force during the shaping extrusion process on the cross-sectional area of the resulting Profile walls.
  • a force acting transversely to the extrusion direction on the extruded profile a force component as a tensile or compressive force during the shaping extrusion process on the cross-sectional area of the resulting Profile walls.
  • the saw is advantageously guided on a guide tool, wherein the saw can be supported on the guide tool or, alternatively, the guide tool on the saw.
  • the saw is advantageously dimensioned such that the entire cross section of the extruded profile is covered by its depth of cut. This ensures that the extruded profile can be cut in a time-saving manner with a single feed of the cutting tool.
  • the extrusion profile can either be cut while the extrusion profile is at a standstill, or the saw can be moved with the extrusion profile moving in the press flow during the cutting process.
  • the saw is provided with a device for compensating for play in the pressing direction.
  • a device for compensating for play in the pressing direction This enables the speed of the press flow to be advantageously maintained undiminished, even if relatively long separation times are to be expected, especially if relatively thick profiles are present.
  • This compensation option avoids undesirable, possibly even damaging influences on the saw and / or extruded profile through which the saw during of the cutting process in a transverse direction is a stressful movement of the extruded profile in the press flow.
  • the feed rate of the saw is advantageously adapted to different profile cross sections, as a result of which increased wear due to excessive stress on the material of the saw can be prevented. As a result, longer tool life can be achieved, which further improves the economy of the process.
  • a conventional separating aid is continuously applied to the saw blade during the cutting process, which prevents the warm chips from sticking to the teeth and the teeth are clogged by the chips.
  • the cutting aid is applied to the saw blade, for example by atomization. This can also serve as a coolant for the saw blade.
  • the guide tool for guiding the separating tool is a robot.
  • the robot is provided with a robot arm that can be controlled according to the movement and / or curvature of the extruded profile.
  • the robot arm can position the saw in a selectable position on the extruded profile.
  • Such positioning advantageously takes place as close as possible to the extruded profile, so that the separation process takes place as quickly as possible due to short distances to be covered, and comparatively high extrusion speeds are possible.
  • the saw is advantageously positioned by means of the robot arm by controlling a higher-level control Central, which has the data required for this in relation to the exact course of the stretched, bent or curved extruded profile. In this way, the saw can, of course, be brought to practically arbitrary positions near the extruded profile within the framework of the movement possibilities given to the robot arm, in order to cut through the extruded profile at the location there.
  • the control of the robot arm by a higher-level control center also enables the robot arm to be guided during the cutting to such an extent that there is practically no relative movement to the extruded profile moving in the press flow.
  • the saw is advanced with respect to a guide device which is moved along with the robot arm and in particular permits one-dimensional movement. Because of this possibility of movement, the saw can therefore be guided through the extruded profile without a corresponding movement of the robot arm.
  • This significantly simplifies the computational effort to control the robot arm if the robot arm is to be moved with the extruded profile during the cutting process and a combined movement of the robot arm is required to move the robot arm and to move the saw during the cutting process.
  • the extrusion speed during cutting can be in the range of 10 to 30 m / min. This is preferably between 20 and 30 m / min and is particularly preferably approximately 25 m / min.
  • the extrusion speed is usually between 1 and 5 m / min, and is particularly preferably about 2 to 3 m / min.
  • the separation time for profiles made of aluminum or magnesium alloys is preferably less than approximately 4 seconds, and is particularly preferably approximately 2 seconds.
  • FIG. 1 It shows:
  • Fig. 1 is a schematic view of an apparatus for performing the method according to the invention.
  • Figure 1 is to illustrate the inventive method.
  • the representation takes place in a Cartesian coordinate system, whose XY plane is parallel to the paper plane, and whose Z axis is perpendicular to the XY plane.
  • a robot arm 3 is shown, which at its end guides a cutting tool designed as a saw, which is positioned near an extruded profile 5.
  • the extruded profile 5 is shown in cross section, i. H. it moves in the press flow in the Z direction.
  • the hollow extruded profile in the present case consists of an aluminum alloy. Nevertheless, it could instead consist of a magnesium alloy.
  • the mechanical separation of the extruded profile 5 takes place by means of the saw blade 6 arranged in the XY plane, which is set in rotation by the main drive 7.
  • the saw blade 6 is guided in the Y direction through the extruded profile 5, the saw being moved along a feed axis 1 in the direction of the Y axis.
  • the hollow extruded profile has a temperature in the range from 200 ° C. to 600 ° C., preferably 500 ° C. to 600 ° C.
  • a counter-holder 4 in the form of a ⁇ in the XZ plane located flat plate for its support on.
  • the counterholder 4 absorbs the mechanical forces exerted by the saw on the extruded profile 5 in the Y direction and thus prevents deformation and a change in the contour of the extruded profile 5.
  • the saw is also equipped with a device for axial play compensation in the form of a compensating bearing 2 equipped to compensate for the movement of the extruded profile 5 in the Z direction during the cutting process.
  • the robot arm 3 can be moved with the extruded profile 5 in the Z direction while maintaining its relative position to the extruded profile 5.
  • the control of the robot arm of the robot arm is carried out by a control center (not shown) which knows the exact course of the extruded profile.
  • the movement of the robot arm 3 in accordance with the moving extruded profile and the movement of the saw through the extruded profile 5 during the cutting process are decoupled in the Y direction due to the existing feed axis 1.
  • Carrying the robot arm 3 with the moving extruded profile in the press flow is particularly important for thick profiles that require a comparatively long cutting time. and / or rapid extrusion speeds. Often, however, the axial play compensation possibility created by the compensation bearing 2 of the saw blade 6 will suffice to avoid damage to the saw blade 6 and / or the extruded profile 5 during the cutting process due to different directions of movement of the cutting tool and the extruded profile.
  • the method according to the invention can ensure that desired partial lengths of extruded profiles can be cut off quickly and exactly in the press flow without having to accept an adverse effect on the contour.
  • the significantly shorter total production time of the profiled workpieces compared to conventional cutting processes enables higher quantities per unit of time, which has a favorable effect on the economy of the process.

Abstract

A method for cutting a hollow extruded profile section into lengths in a press flow, wherein the extruded profile section is bent upon exit from the press either simultaneously with or directly after the forming extrusion process by a force acting thereon in a transversal manner in relation to the direction of the extruding press, and a force component acts as a traction of pressure force during the forming extrusion process on the cross-sectional area of the hollow-profile walls thus arising. The bent extruded profile section is cut in the press flow by the mechanical action of a saw, whereby force exerted on the extruded profile section during cutting is compensated by a supporting device arranged adjacent to the extruded profile section, so that deformation of the bent extruded profile section is prevented.

Description

Verfahren zum Ablängen von Strangpressprofilen Process for cutting extruded profiles
Die vorliegende Erfindung betrifft ein Verfahren zum Ablängen eines Strangpressprofils im Pressenfluss einer Strangpressvorrichtung. Genauer betrifft sie ein Verfahren zum Ablängen eines Strangpressprofils, welches nach dem Pressenaustritt gleichzeitig mit oder unmittelbar nach dem formgebenden Strangpressvorgang durch eine quer zur Strangpressrichtung auf das Strangpressprofil einwirkende Kraft gebogen wird, wobei eine Kraftkomponente als Zug- oder Druckkraft beim formgeben- ! den Strangpressvorgang auf die Querschnittsfläche der entstehenden Profilwände einwirkt.The present invention relates to a method for cutting an extrusion profile to length in the press flow of an extrusion device. More specifically, it relates to a method for cutting an extruded profile to length, which is bent after the press exit simultaneously with or immediately after the shaping extrusion process by a force acting transversely to the extrusion direction on the extruded profile, a force component being used as a tensile or compressive force when the mold is given! the extrusion process acts on the cross-sectional area of the resulting profile walls.
Industriell werden profilierte Werkstücke häufig auf der Grundlage von durch Strangpressen von Halbzeug geformten Profilen gefertigt. Je nach eingesetztem Material des Halbzeugs erfolgt das Strangpressen bei einer Temperatur, welche die plastische Verformbarkeit gewährleistet. Beispielsweise werden Aluminium- oder Magnesiumlegierungen im allgemeinen bei Temperaturen von 250 °C bis 600 °C verpresst. Zur Weiterverarbeitung der Strangpressprofile müssen diese, entsprechend den jeweiligen Abmessungen der herzustellenden profilierten Werkstücke abgelängt werden. Zum Ablängen kommen überwiegend mechanische Trennwerkzeuge, wie Sägen oder Scheren, zum Einsatz.Profiled workpieces are often manufactured industrially on the basis of profiles formed by extrusion of semi-finished products. Depending on the material used for the semi-finished product, the extrusion is carried out at a temperature which guarantees the plastic deformability. For example, aluminum or magnesium alloys are generally pressed at temperatures from 250 ° C to 600 ° C. For further processing of the extruded profiles, these must be cut to length according to the respective dimensions of the profiled workpieces to be produced. Mechanical cutting tools such as saws or scissors are mainly used for cutting to length.
Das Ablängen gebogener Strangpressprofile durch mechanische Trennmittel erfolgt bislang in deren abgekühlten Zustand, da durch die mechanische Beanspruchung beim Trennvorgang eine Verformung der Profile und eine damit einher gehende Konturun- genauigkeit nicht auszuschließen ist. Dies verlängert jedoch die Gesamtproduktionsdauer, verringert den Ausstoß an gefertigten Werkstücken, führt zu höheren Betriebskosten und ver- ringert schließlich die Wirtschaftlichkeit bei der Herstellung.Until now, curved extruded profiles have been cut to length by mechanical separating means in their cooled state, since a deformation of the profiles and the associated contour inaccuracy cannot be ruled out due to the mechanical stress during the separating process. However, this extends the overall production time, reduces the output of finished workpieces, leads to higher operating costs and ultimately lowers manufacturing efficiency.
Sollen die noch warmen Strangpressprofile im Pressenfluss abgelängt werden, so ist dies bisher nur bei geraden Profilen, beispielsweise unter Einsatz von "Fliegenden Scheren", möglich. Um eine hohe Ausschussquote zu vermeiden, werden gerade Profile zumindest einem weiteren Verfahrensschritt zum Kalibrieren der Endkontur der Profile unterzogen, wozu im allgemeinen herkömmliche Richtvorrichtungen eingesetzt werden. Werden durch das Trennmittel Konturungenauigkeiten beim Trennvorgang verursacht, werden diese beim Richten beseitigt. Typische Längen abgelängter Profilstücke liegen bei geraden Profilen im Bereich von 30 bis 50 Meter, um die mit dem Richten stets auftretenden Materialverluste von ca. 1 bis 2 Meter aufgrund des Einspannens des Profilstücks relativ gering zu halten.If the still warm extruded profiles are to be cut to length in the press flow, so far this has only been possible with straight profiles, for example using "flying shears". In order to avoid a high reject rate, profiles in particular are subjected to at least one further process step for calibrating the final contour of the profiles, for which purpose conventional straightening devices are generally used. If the release agent causes contour inaccuracies during the cutting process, these are eliminated during straightening. Typical lengths of profile sections cut to length lie in the range of 30 to 50 meters in the case of straight profiles in order to keep the material losses of approximately 1 to 2 meters that occur with straightening relatively low due to the clamping of the profile section.
Werden die Profile nach Austreten aus der Strangpressvorrichtung durch Einwirken äußerer Kräfte plastisch verformt, d. h. in eine bestimmte Raumform gebogen, kommt ein Richten der abgelängten Profilstücke nicht in Betracht. Werden beim Ablängen der Profilstücke Konturungenauigkeiten verursacht, muß eine Kalibrierung in einer dem abgelängten Profil angepassten, technisch aufwändigen Vorrichtung zum Konturformen durchgeführt werden. Darüber hinaus müssen die Profilstücke, etwa bei einer kreisförmigen Biegung der Profile, abhängig vom Biegeradius, oftmals in wesentlich kürzeren Abständen, beispielsweise in einem Abstand von ca. 1 Meter abgelängt werden, um ein "Auflaufen" des Profils zu vermeiden. Solche relativ kurzen Profilstücke sind jedoch im allgemeinen nur mit einem relativ hohen Materialverlust zu kalibrieren. Es ist also bei nach Pressenaustritt gebogenen Profilen auf jeden Fall zu vermei- den, dass durch das Ablängen des noch warmen Profils im Pressenfluss Konturungenauigkeiten verursacht werden.If, after exiting the extrusion device, the profiles are plastically deformed by the action of external forces, ie bent into a certain spatial shape, straightening of the lengthened profile pieces is out of the question. If contour inaccuracies are caused when the profile pieces are cut to length, calibration must be carried out in a technically complex device for contour shaping which is adapted to the cut profile. In addition, the profile pieces, for example in the case of a circular bending of the profiles, depending on the bending radius, often have to be cut to a substantially shorter distance, for example at a distance of approximately 1 meter, in order to prevent the profile from “running up”. However, such relatively short profile pieces can generally only be calibrated with a relatively high loss of material. It is therefore absolutely to be avoided with profiles bent after the press exit that the cutting of the still warm profile in the press flow causes contour inaccuracies.
Demgegenüber liegt die Aufgabe der vorliegenden Erfindung darin, ein Verfahren der eingangs genannten Art zu zeigen, mit dem das noch warme Strangpressprofil im Pressenfluss abgelängt werden kann, ohne dass eine Verformung des Profils zu befürchten ist.In contrast, the object of the present invention is to show a method of the type mentioned at the outset, with which the still warm extruded profile can be cut to length in the press flow without fear of deformation of the profile.
Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is solved by the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.
Gemäß vorliegender Erfindung ist ein Verfahren zum Ablängen eines hohlförmigen Strangpressprofils im Pressenfluss gezeigt, welches Verfahren sich dadurch auszeichnet, dass das gebogene Strangpressprofil im Pressenfluss durch die mech nische Einwirkung einer Säge abgelängt wird, wobei die beim Ablängen auf das Strangpressprofil ausgeübte Kraft durch eine dem Strangpressprofil anliegende Stützvorrichtung ausgeglichen wird, derart, dass eine Verformung des gebogenen Strangpressprofils vermieden wird, wobei das Strangpressprofil aus einer Aluminiumlegierung oder einer Magnesiumlegierung besteht und beim Ablängen eine Temperatur im Bereich 200 °C - 600 °C, vorzugsweise 500°C - 600°C aufweist.According to the present invention, a method for cutting a hollow extruded profile in the press flow is shown, which method is characterized in that the bent extruded profile is cut to length in the press flow by the mechanical action of a saw, the force exerted on the extruded profile by cutting to a force by the extruded profile adjacent support device is compensated in such a way that deformation of the bent extruded profile is avoided, the extruded profile consisting of an aluminum alloy or a magnesium alloy and, when cut to length, has a temperature in the range from 200 ° C. to 600 ° C., preferably 500 ° C. to 600 ° C. ,
Erfindungsgemäß kommt hierbei ausschließlich ein Strangpressprofil in Betracht, das nach dem Pressenaustritt gleichzeitig mit oder unmittelbar nach dem formgebenden Strangpressvorgang durch eine quer zur Strangpressrichtung auf das Strangpressprofil einwirkende Kraft gebogen wird, wobei eine Kraftkomponente als Zug- oder Druckkraft beim formgebenden Strangpressvorgang auf die Querschnittsfläche der entstehenden Profilwände einwirkt. Ein solches Verfahren zum Krümmen von Strangpressprofilen ist in dem Europäischen Patent EP 0 706 843 Bl beschrieben. Gemäß dieser Druckschrift kann die Krafteinwirkung auf das Strangpressprofil beispielsweise durch eine Rolle, eine Querkraft erzeugende Gleitfläche, einen Rollenkäfig oder dergleichen bewirkt werden.According to the invention, only an extruded profile is considered here, which is bent after the press exit at the same time as or immediately after the shaping extrusion process by a force acting transversely to the extrusion direction on the extruded profile, a force component as a tensile or compressive force during the shaping extrusion process on the cross-sectional area of the resulting Profile walls. Such a method for bending extruded profiles is described in European patent EP 0 706 843 B1. According to this document, the force acting on the extruded profile can be brought about, for example, by a roller, a sliding surface which generates a transverse force, a roller cage or the like.
Die Säge wird vorteilhaft an einem Führungswerkzeug geführt, wobei die Säge am Führungswerkzeug, oder alternativ hierzu, das Führungswerkzeug an der Säge abgestützt sein kann.The saw is advantageously guided on a guide tool, wherein the saw can be supported on the guide tool or, alternatively, the guide tool on the saw.
Die Säge ist vorteilhaft so dimensioniert, dass der gesamte Querschnitt des Strangpressprofils durch seine Schnitttiefe überdeckt wird. Dies gewährleistet, dass das Strangpressprofil zeitsparend mit einem einzigen Vorschub des Trennwerkzeugs durchtrennt werden kann.The saw is advantageously dimensioned such that the entire cross section of the extruded profile is covered by its depth of cut. This ensures that the extruded profile can be cut in a time-saving manner with a single feed of the cutting tool.
Bei dem erfindungsgemäßen Verfahren kann das Trennen des • Strangpressprofils entweder während des Stillstands des Strangpressprofils erfolgen, oder die Säge kann während des Trennvorgangs mit dem im Pressenfluss bewegten Strangpressprofil mitbewegt werden.In the method according to the invention, the extrusion profile can either be cut while the extrusion profile is at a standstill, or the saw can be moved with the extrusion profile moving in the press flow during the cutting process.
In einer besonders vorteilhaften Ausgestaltung der Erfindung ist die Säge mit einer Vorrichtung zum Spielausgleich in Pressrichtung versehen. Dies ermöglicht, dass die Geschwindigkeit des Pressenflusses in vorteilhafter Weise unvermindert aufrecht erhalten werden kann, selbst wenn mit relativ langen Trennzeiten, insbesondere bei Vorliegen von relativ dicken Profilen zu rechnen ist. Diese Ausgleichsmöglichkeit vermeidet unerwünschte, gegebenenfalls sogar schädigende Einflüsse auf die Säge und/oder Strangpressprofil durch die die Säge während des Trennvorgangs in einer Querrichtung belastende Bewegung des Strangpressprofils im Pressenfluss.In a particularly advantageous embodiment of the invention, the saw is provided with a device for compensating for play in the pressing direction. This enables the speed of the press flow to be advantageously maintained undiminished, even if relatively long separation times are to be expected, especially if relatively thick profiles are present. This compensation option avoids undesirable, possibly even damaging influences on the saw and / or extruded profile through which the saw during of the cutting process in a transverse direction is a stressful movement of the extruded profile in the press flow.
Die Vorschubgeschwindigkeit der Säge wird in vorteilhafter Weise gegebenenfalls unterschiedlichen Profilquerschnitten an- gepasst, wodurch einem erhöhtem Verschleiß durch eine Überbeanspruchung des Materials der Säge vorgebeugt werden kann. Hierdurch können längere Werkzeugstandzeiten erreicht werden, was die Wirtschaftlichkeit des Verfahrens weiter verbessert.The feed rate of the saw is advantageously adapted to different profile cross sections, as a result of which increased wear due to excessive stress on the material of the saw can be prevented. As a result, longer tool life can be achieved, which further improves the economy of the process.
Bei einer Säge als Trennwerkzeug tritt häufig das Problem auf, dass sich die Zähnung des Sägeblatts mit den warmen Spänen des Strangpressprofils zusetzt. Um dies zu vermeiden ist es vorteilhaft, wenn auf das Sägeblatt während des Trennvorgangs fortwährend ein herkömmlicher Trennhilfstoff aufgebracht wird, welcher verhindert, dass die warmen Späne auf der Zahnung haften bleiben, und die Zahnung durch die Späne zugesetzt wird. Der Trennhilfsstoff wird beispielsweise durch Zerstäuben auf das Sägeblatt aufgebracht. Dieser kann gleichzeitig als Kühlmittel für das Sägeblatt dienen.With a saw as a cutting tool, the problem often arises that the teeth of the saw blade become clogged with the warm chips of the extruded profile. In order to avoid this, it is advantageous if a conventional separating aid is continuously applied to the saw blade during the cutting process, which prevents the warm chips from sticking to the teeth and the teeth are clogged by the chips. The cutting aid is applied to the saw blade, for example by atomization. This can also serve as a coolant for the saw blade.
Bei einer bevorzugten Ausgestaltung der Erfindung ist das Führungswerkzeug zur Führung des Trennwerkzeugs ein Roboter. Der Roboter ist hierzu mit einem entsprechend der Bewegung und/oder Krümmung des Strangpressprofils steuerbaren Roboterarm versehen. Die Säge kann durch den Roboterarm in einer wählbaren Position am Strangpressprofil positioniert werden. Vorteilhaft erfolgt eine solche Positionierung möglichst nah am Strangpressprofil, so dass der Trennvorgang durch kurze zurückzulegende Wege so schnell wie möglich abläuft, und vergleichsweise hohe Strangpressgeschwindigkeiten möglich sind. Die Positionierung der Säge mittels des Roboterarms erfolgt vorteilhaft durch die Steuerung einer übergeordneten Steuer- zentrale, welche über die hierzu notwendigen Daten in Bezug auf den exakten Verlauf des gestreckten oder gebogenen bzw. gekrümmten Strangpressprofils verfügt. Die Säge kann auf diese Weise, selbstverständlich im Rahmen der dem Roboterarm verliehenen Bewegungsmöglichkeiten, an praktisch beliebig wählbare Positionen nahe des Strangpressprofils gebracht werden, um das Strangpressprofil an der dortigen Stelle zu durchtrennen.In a preferred embodiment of the invention, the guide tool for guiding the separating tool is a robot. For this purpose, the robot is provided with a robot arm that can be controlled according to the movement and / or curvature of the extruded profile. The robot arm can position the saw in a selectable position on the extruded profile. Such positioning advantageously takes place as close as possible to the extruded profile, so that the separation process takes place as quickly as possible due to short distances to be covered, and comparatively high extrusion speeds are possible. The saw is advantageously positioned by means of the robot arm by controlling a higher-level control Central, which has the data required for this in relation to the exact course of the stretched, bent or curved extruded profile. In this way, the saw can, of course, be brought to practically arbitrary positions near the extruded profile within the framework of the movement possibilities given to the robot arm, in order to cut through the extruded profile at the location there.
Die Steuerung des Roboterarms durch eine übergeordnete Steuerzentrale ermöglicht auch, dass der Roboterarm während des Ab- längens derart geführt wird, dass praktisch keine Relativbewegung zum im Pressenfluss bewegten Strangpressprofil auftritt.The control of the robot arm by a higher-level control center also enables the robot arm to be guided during the cutting to such an extent that there is practically no relative movement to the extruded profile moving in the press flow.
Wie schon die oben genannte Vorrichtung zum Spielausgleich in Pressrichtung, vermeidet ein solches Mitführen des Roboterarms mit dem Strangpressprofil schädigende Einflüsse der unterschiedlichen Bewegungsrichtungen beim Trennen von Säge und Strangpressprofil auf das Profil und/oder Werkzeug.Like the above-mentioned device for compensating for play in the pressing direction, carrying the robot arm with the extruded profile in this way avoids damaging influences of the different directions of movement when separating the saw and the extruded profile on the profile and / or tool.
Erfindungsgemäß ist es vorteilhaft, wenn der Vorschub der Säge bezüglich einer mit dem Roboterarm mitbewegten, insbesondere eine eindimensionale Bewegung zulassenden, Führungseinrichtung erfolgt. Die Säge kann also aufgrund dieser Bewegungsmöglichkeit ohne eine entsprechende Bewegung des Roboterarms durch das Strangpressprofil geführt werden. Dies erleichtert vor allem dann den rechnerischen Aufwand zur Steuerung des Roboterarms wesentlich, wenn der Roboterarm während des Trennvorgangs mit dem Strangpressprofil mitbewegt werden soll, und eine kombinierte Bewegung des Roboterarms zur Mitbewegung des Roboterarms und zur Bewegung der Säge beim Trennvorgang erforderlich ist. Bei Profilen aus einer Aluminiumlegierung kann die Strangpressgeschwindigkeit während des Ablängens im Bereich von 10 bis 30 m/min liegen. Vorzugsweise liegt diese zwischen 20 und 30 m/min und beträgt insbesondere bevorzugt ungefähr 25 m/min. Bei Verwenden einer Magnesiumlegierung liegt die Strangpressgeschwindigkeit üblich zwischen 1 und 5 m/min, und beträgt insbesondere bevorzugt ungefähr 2 bis 3 m/min. Die Trennzeit beträgt bei Profilen aus Aluminium- oder Magnesiumlegierungen vorzugsweise weniger als ungefähr 4 Sekunden, und beträgt insbesondere bevorzugt ungefähr 2 Sekunden.According to the invention, it is advantageous if the saw is advanced with respect to a guide device which is moved along with the robot arm and in particular permits one-dimensional movement. Because of this possibility of movement, the saw can therefore be guided through the extruded profile without a corresponding movement of the robot arm. This significantly simplifies the computational effort to control the robot arm, if the robot arm is to be moved with the extruded profile during the cutting process and a combined movement of the robot arm is required to move the robot arm and to move the saw during the cutting process. In the case of aluminum alloy profiles, the extrusion speed during cutting can be in the range of 10 to 30 m / min. This is preferably between 20 and 30 m / min and is particularly preferably approximately 25 m / min. When using a magnesium alloy, the extrusion speed is usually between 1 and 5 m / min, and is particularly preferably about 2 to 3 m / min. The separation time for profiles made of aluminum or magnesium alloys is preferably less than approximately 4 seconds, and is particularly preferably approximately 2 seconds.
Die vorliegende Erfindung wird nun unter Bezugnahme auf Fig. 1 näher erläutert. Es zeigt:The present invention will now be explained in more detail with reference to FIG. 1. It shows:
Fig. 1 eine schematische Ansicht einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens.Fig. 1 is a schematic view of an apparatus for performing the method according to the invention.
Figur 1 soll das erfindungsgemäße Verfahren veranschaulichen. Die Darstellung erfolgt in einem kartesischen Koordinatensystem, dessen XY-Ebene parallel zur Papierebene ist, und dessen Z-Achse senkrecht auf der XY-Ebene steht. Gezeigt ist ein Roboterarm 3, welcher an seinem Ende ein als Säge ausgeführtes Trennwerkzeug führt, das nahe einem Strangpressprofil 5 positioniert wird. Das Strangpressprofil 5 ist im Querschnitt dargestellt, d. h. es bewegt sich im Pressenfluss in Z-Richtung.Figure 1 is to illustrate the inventive method. The representation takes place in a Cartesian coordinate system, whose XY plane is parallel to the paper plane, and whose Z axis is perpendicular to the XY plane. A robot arm 3 is shown, which at its end guides a cutting tool designed as a saw, which is positioned near an extruded profile 5. The extruded profile 5 is shown in cross section, i. H. it moves in the press flow in the Z direction.
Das hohlförmige Strangpressprofil besteht im vorliegenden Fall aus einer Aluminiumlegierung. Gleichwohl könnte es anstelle dessen aus einer Magnesiumlegierung bestehen.The hollow extruded profile in the present case consists of an aluminum alloy. Nevertheless, it could instead consist of a magnesium alloy.
Das mechanische Trennen des Strangpressprofils 5 erfolgt durch das in der XY-Ebene angeordnete Sägeblatt 6, welches über den Hauptantrieb 7 in Rotationsbewegung versetzt wird. Zum Abtren- nen des Strangpressprofils 5 wird das Sägeblatt 6 in Y- Richtung durch das Strangpressprofil 5 geführt, wobei die Säge längs einer Vorschubachse 1 in Richtung der Y-Achse bewegt wird. Beim Ablängen weist das hohlförmige Strangpressprofil eine Temperatur im Bereich von 200 °C - 600°C, vorzugsweise 500°C - 600°C auf.The mechanical separation of the extruded profile 5 takes place by means of the saw blade 6 arranged in the XY plane, which is set in rotation by the main drive 7. To separate NEN of the extruded profile 5, the saw blade 6 is guided in the Y direction through the extruded profile 5, the saw being moved along a feed axis 1 in the direction of the Y axis. When cut to length, the hollow extruded profile has a temperature in the range from 200 ° C. to 600 ° C., preferably 500 ° C. to 600 ° C.
Um eine Verformung des Strangpressprofils bzw. Ungenauigkeiten in der Kontur aufgrund der beim Trennvorgang auf das Strangpressprofil 5 einwirkenden mechanischen Kräfte zu vermeiden, liegt dem Strangpressprofil 5 ein Gegenhalter 4 in Form einer ■ in der XZ-Ebene befindlichen ebenen Platte zu dessen Stützung an. Der Gegenhalter 4 nimmt die beim Trennvorgang durch die Säge auf das Strangpressprofil 5 in Y-Richtung ausgeübten mechanischen Kräfte auf und verhindert so eine Verformung und eine Änderung der Kontur des Strangpressprofils 5. Die Säge ist zusätzlich mit einer Vorrichtung zum axialen Spielausgleich in Form einer Ausgleichslagerung 2 ausgestattet, um die Bewegung des Strangpressprofils 5 in Z-Richtung während des Trennvorgangs auszugleichen. Zudem kann der Roboterarm 3 unter Beibehaltung seiner relativen Position zum Strangpressprofil 5 mit dem Strangpressprofil 5 in Z-Richtung bewegt werden. Die Steuerung des Roboterarms des Roboterarms übernimmt eine (nicht dargestellte) Steuerzentrale, welche den exakten Verlauf des Strangpressprofils kennt. Die Bewegung des Roboterarms 3 entsprechend dem bewegten Strangpressprofil und die Bewegung der Säge durch das Strangpressprofil 5 beim Trennvorgang, sind aufgrund der vorhandenen Vorschubachse 1 in Y- Richtung entkoppelt.To a deformation of the extruded profile or inaccuracies in the contour to be avoided because of the forces acting during the separation process on the extruded profile 5 mechanical forces is the extruded profile 5, a counter-holder 4 in the form of a ■ in the XZ plane located flat plate for its support on. The counterholder 4 absorbs the mechanical forces exerted by the saw on the extruded profile 5 in the Y direction and thus prevents deformation and a change in the contour of the extruded profile 5. The saw is also equipped with a device for axial play compensation in the form of a compensating bearing 2 equipped to compensate for the movement of the extruded profile 5 in the Z direction during the cutting process. In addition, the robot arm 3 can be moved with the extruded profile 5 in the Z direction while maintaining its relative position to the extruded profile 5. The control of the robot arm of the robot arm is carried out by a control center (not shown) which knows the exact course of the extruded profile. The movement of the robot arm 3 in accordance with the moving extruded profile and the movement of the saw through the extruded profile 5 during the cutting process are decoupled in the Y direction due to the existing feed axis 1.
Eine Mitführung des Roboterarms 3 mit dem bewegten Strangpressprofil im Pressenfluss kommt vor allem bei dicken Profilen, welche eine vergleichsweise lange Trennzeit erfordern, und/oder schnellen Strangpressgeschwindigkeiten in Betracht. Häufig wird jedoch bereits die durch die Ausgleichslagerung 2 des Sägeblatts 6 geschaffene axiale Spielausgleichsmöglichkeit genügen, eine Beschädigung des Sägeblatts 6 und/oder des Strangpressprofils 5 beim Trennvorgang aufgrund unterschiedlichen Bewegungsrichtungen von Trennwerkzeug und Strangpressprofil zu vermeiden.Carrying the robot arm 3 with the moving extruded profile in the press flow is particularly important for thick profiles that require a comparatively long cutting time. and / or rapid extrusion speeds. Often, however, the axial play compensation possibility created by the compensation bearing 2 of the saw blade 6 will suffice to avoid damage to the saw blade 6 and / or the extruded profile 5 during the cutting process due to different directions of movement of the cutting tool and the extruded profile.
Durch das erfindungsgemäße Verfahren kann jedenfalls sichergestellt werden, dass gewünschte Teillängen von Strangpressprofilen schnell und exakt im Pressenfluss abgetrennt werden können, ohne dass dabei eine nachteilige Beeinträchtigung der Kontur in Kauf genommen werden muss. Die im Vergleich mit herkömmlichen Ablängverfahren deutlich verkürzte Gesamtfertigungszeit der profilierten Werkstücke, ermöglicht höhere Stückzahlen pro Zeiteinheit, was sich günstig auf die Wirtschaftlichkeit des Verfahrens auswirkt. In any case, the method according to the invention can ensure that desired partial lengths of extruded profiles can be cut off quickly and exactly in the press flow without having to accept an adverse effect on the contour. The significantly shorter total production time of the profiled workpieces compared to conventional cutting processes enables higher quantities per unit of time, which has a favorable effect on the economy of the process.

Claims

Patentansprücheclaims
Verfahren zum Ablängen eines hohlförmigen Strangpressprofils im Pressenfluss, wobei das Strangpressprofil nach dem Pressenaustritt gleichzeitig mit oder unmittelbar nach dem formgebenden Strangpressvorgang durch eine quer zur Strangpressrichtung auf das Strangpressprofil einwirkende Kraft gebogen wird, wobei eine Kraftkomponente als Zug- oder Druckkraft beim formgebenden Strangpressvorgang auf die Querschnittsfläche der entstehenden Hohlprofilwände einwirkt, dadurch gekennzeichnet, dass das gebogene Strangpressprofil im Pressenfluss durch die mechanische Einwirkung einer Säge abgelängt wird, wobei die beim Ablängen auf das Strangpressprofil ausgeübte Kraft durch eine dem Strangpressprofil anliegende Stützvorrichtung ausgeglichen wird, derart, dass eine Verformung des gebogenen Strangpressprofils vermieden wird, wobei das Strangpressprofil aus einer Aluminiumlegierung oder einer Magnesiumlegierung besteht und beim Ablängen eine Temperatur im Bereich 200 °C - 600 °C aufweist.Method for cutting a hollow extruded profile to length in the press flow, the extruded profile being bent after the press exit simultaneously with or immediately after the shaping extrusion process by a force acting transversely to the extruding direction on the extruded profile, a force component acting as a tensile or compressive force in the shaping extrusion process on the cross-sectional area of the resulting hollow profile walls, characterized in that the curved extruded profile is cut to length in the press flow by the mechanical action of a saw, the force exerted on the extruded profile when being cut to length is compensated for by a supporting device in contact with the extruded profile, in such a way that deformation of the bent extruded profile is avoided is, the extruded profile consists of an aluminum alloy or a magnesium alloy and has a temperature in the range of 200 ° C - 600 ° C when cut to length.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Strangpressprofil beim Ablängen eine Temperatur im Bereich 500°C - 600°C aufweist.A method according to claim 1, characterized in that the extruded profile has a temperature in the range of 500 ° C - 600 ° C when cut to length.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Säge an einem Führungswerkzeug geführt ist.A method according to claim 1, characterized in that the saw is guided on a guide tool.
Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Säge am Führungswerkzeug abgestützt ist. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das Führungswerkzeug an der Säge abgestützt ist.A method according to claim 3, characterized in that the saw is supported on the guide tool. A method according to claim 3, characterized in that the guide tool is supported on the saw.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Säge derart dimensioniert ist, dass -der gesamte Querschnitt des Strangpressprofils durch ihre Schnitttiefe überdeckt wird.A method according to claim 1, characterized in that the saw is dimensioned such that the entire cross section of the extruded profile is covered by its depth of cut.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Säge mit einer Vorrichtung zum Spielausgleich in Pressrichtung versehen ist.A method according to claim 1, characterized in that the saw is provided with a device for compensating for play in the pressing direction.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Säge während des Trennvorgangs mit dem Strangpressprofil mitbewegt wird.A method according to claim 1, characterized in that the saw is moved with the extruded profile during the cutting process.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Führungswerkzeug ein Roboter ist, mit einem entsprechend der Bewegung und/oder Krümmung des Strangpressprofils steuerbaren Roboterarm.A method according to claim 1, characterized in that the guide tool is a robot, with a robot arm controllable according to the movement and / or curvature of the extruded profile.
Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Säge durch den Roboterarm in einer wählbaren Position nahe des Strangpressprofils positioniert wird. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass der Vorschub der Säge bezüglich einer mit dem Roboterarm mitbewegten Führungseinrichtung erfolgt.A method according to claim 9, characterized in that the saw is positioned by the robot arm in a selectable position near the extruded profile. A method according to claim 9, characterized in that the saw is advanced with respect to a guide device which is moved along with the robot arm.
Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass der Vorschub der Säge relativ zum Roboterarm in einer Dimension erfolgt.A method according to claim 11, characterized in that the saw is fed in one dimension relative to the robot arm.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit eines Strangpressprofils aus einer Aluminiumlegierung während des Trennvorgangs im Bereich 10 - 30 m/min, insbesondere 20 - 30 m/min, liegt.A method according to claim 1, characterized in that the extrusion speed of an extruded profile made of an aluminum alloy during the cutting process is in the range 10-30 m / min, in particular 20-30 m / min.
Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit ungefähr 25 m/min beträgt.A method according to claim 13, characterized in that the extrusion speed is approximately 25 m / min.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit eines Strangpressprofils aus einer Magnesiumlegierung während des Trennvorgangs im Bereich 1 - 5 m/min, insbesondere 2 - 3 m/min, liegt.A method according to claim 1, characterized in that the extrusion speed of an extruded profile made of a magnesium alloy during the cutting process is in the range 1-5 m / min, in particular 2-3 m / min.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Trennzeit während des Trennvorgangs des Strangpressprofils maximal 4 Sekunden beträgt. Verfahren nach Anspruch 16, dadurch gekennzeichnet, dass die Trennzeit während des Trennvorgangs ungefähr 2 Sekunden beträgt.A method according to claim 1, characterized in that the separation time during the separation process of the extruded profile is a maximum of 4 seconds. A method according to claim 16, characterized in that the separation time during the separation process is approximately 2 seconds.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass beim Ablängen eines Strangpressprofils mit unterschiedlichen Querschnitt das Zeitspanungsvolumen während der Trennvorgänge im wesentlichen konstant ist. A method according to claim 1, characterized in that when an extruded profile with a different cross section is cut to length, the chip removal volume is substantially constant during the separating processes.
EP03714774A 2002-03-05 2003-03-05 Method for cutting extruded profile sections Expired - Lifetime EP1392457B1 (en)

Applications Claiming Priority (3)

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DE10209481A DE10209481C1 (en) 2002-03-05 2002-03-05 Process for cutting an extruded profile
DE10209481 2002-03-05
PCT/EP2003/002231 WO2003074205A1 (en) 2002-03-05 2003-03-05 Method for cutting extruded profile sections

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CN100391687C (en) * 2005-08-01 2008-06-04 沈阳华铁异型材有限公司 Production technology of grease cooler air chamber and its product
DE102013008635B3 (en) * 2013-05-18 2014-06-26 Ulrich Bruhnke Method of producing metal sheet plate from extruded shaped profile, involves deforming U-shaped profile to metal sheet, by moving gripping elements outward, and subjecting metal sheet to deformation, by stretching metal sheet
CN106914505B (en) * 2017-03-03 2019-03-01 东莞市闻誉实业有限公司 Aluminium alloy extruded mechanism

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CN1514750A (en) 2004-07-21
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WO2003074205A1 (en) 2003-09-12
DE50300620D1 (en) 2005-07-14
DE10209481C1 (en) 2003-12-04
JP2005518283A (en) 2005-06-23
CA2462533A1 (en) 2003-09-12
US6862911B2 (en) 2005-03-08
DK1392457T3 (en) 2005-10-10
NO20034933L (en) 2003-11-05
US20040163438A1 (en) 2004-08-26
CN1253263C (en) 2006-04-26
NO20034933D0 (en) 2003-11-05
ATE297269T1 (en) 2005-06-15

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