EP1484122A2 - Method of determining the exit speed of extruded profiles and device for carrying out the method - Google Patents

Method of determining the exit speed of extruded profiles and device for carrying out the method Download PDF

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Publication number
EP1484122A2
EP1484122A2 EP04012081A EP04012081A EP1484122A2 EP 1484122 A2 EP1484122 A2 EP 1484122A2 EP 04012081 A EP04012081 A EP 04012081A EP 04012081 A EP04012081 A EP 04012081A EP 1484122 A2 EP1484122 A2 EP 1484122A2
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EP
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Prior art keywords
extrusion
die
extruded profile
holder
speed
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EP04012081A
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German (de)
French (fr)
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EP1484122A3 (en
EP1484122B1 (en
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Alf Birkenstock
Markus Jandewerth
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WKW Engineering GmbH
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WKW Erbsloeh Automotive GmbH
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    • 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
    • B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
    • 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 determination the strand exit speed of, in particular with variable radii of curvature from extruded profiles an extrusion device, according to the preamble of the claim 1.
  • the invention further relates to a device to carry out the method according to the preamble of Claim 8.
  • Conventional extrusion devices generally include an extrusion die holder housed in a cassette holder and one accommodated in the extrusion die holder Extrusion die.
  • the extrusion tool is equipped with a die that exits the die downstream die mouth in the form of an opening cone is provided. If hollow profiles are to be pressed, a mandrel part is also connected upstream of the die.
  • the die Still inside the extrusion die holder is the die, more precisely the die mouth, usually a deposit, which rests against a pressure plate received in a counter beam supports, from which ultimately the extruded profile emerges in the desired profile shape.
  • the control of an extrusion process or further processing of a pressed extruded profile depends essentially from the exit speed of an extruded profile the extrusion device.
  • an exact Cutting of curved extruded profiles in the press flow, z. B. by the use of "flying scissors” only at Knowledge of the actual exit speed of the Extruded profiles are made, which are, however, in some cases considerable May be subject to fluctuations.
  • a measurement of the actual Exit speed of an extruded profile is therefore an essential prerequisite for adherence to exact Component geometries.
  • CH 507752 describes one that takes place directly in the pressing tool Temperature measurement and DE 4210031 A1 a method for contactless optical length measurement of materials with fluctuating Thickness.
  • the exit speed of an extruded profile is known indirectly via the applied stamp speed determine the resulting volume throughput by conversion determined and based on the length of defined outlet sections the exit speed of the extruded profile is determined.
  • this indirect measurement method is because the multitude of for determining the exit speed used parameters, which in turn are subject to fluctuations, with a comparatively large inaccuracy.
  • such an indirect measurement method is not for everyone Extruded profiles can be used satisfactorily. So require Extruded profiles with a different geometry, for example Extruded profiles with variable radius of curvature, the definition of a large number of different discharge sections, which in practice often leads to considerable difficulties leads.
  • a direct measurement method is the exit speed an extruded profile compared to the to give preference to indirect measurement methods. It is from the patent GB 563893 known the exit speed of a Extruded profile through an extruded profile in the Measure the friction flow of the press wheel directly. in this connection is the friction wheel on the extruded profile by the Friction between friction wheel and extruded profile rotated, where from the number of revolutions of the friction wheel per Unit of time the exit speed of the extruded profile is determined from the extrusion device.
  • the superposition of the two partial beams creates a stripe pattern on the surface of the extruded profile in the form of light and dark stripes with a certain Strip spacing, which results from the angle of incidence of the two partial beams and the wavelength. crossed a scattering particle on the surface of the extruded profile the interference fringe pattern, it always scatters light in the receiving lens when it is currently in a bright field. At the An intensity modulation thus arises from the detector Frequency by multiplying by the strip spacing tangential surface speed of the extruded profile results.
  • Such a vertical positioning of the measuring direction of the laser measuring device is relative to the extruded profile, however only feasible with straight extruded profiles.
  • the laser measuring device must have curved extruded profiles during the curving process with the action of a lateral extruded profile deflected along to be a constant distance in this way between the laser measuring device and the extruded profile.
  • the laser measuring device must be on a pivot bearing to be mounted in relation to the extruded profile approximately vertical positioning of the measuring direction of the Laser measuring device relative to the surface of the extruded profile to enable. This requires very complicated tracking movements the laser measuring device, which is a complex Require control.
  • this object is achieved by a method to determine the strand exit speed of, in particular with variable radii of curvature, extruded profiles from an extrusion device, which one in one Extrusion tool holder accommodated in the cassette holder and one accommodated in the extrusion die holder Extrusion tool, which extrusion tool is a die with one arranged behind a die exit plane Die mouth, and a deposit downstream of the die mouth
  • a measuring device for carrying out a contactless Measuring method is measured.
  • extruded profiles give way with different radius of curvature only at the exit from the extrusion tool in their path clearly from each other from.
  • extruded profiles with different Radius of curvature run inside the extrusion tool essentially on the same track.
  • the deviations of the differently curved extruded profiles are for the Purpose of measuring the tangential surface speed negligible small.
  • the Extrusion speed of the extrusion profile in the die mouth measured.
  • the extrusion speed of the extruded profile in the downstream of the die mouth Deposit are measured.
  • the measuring direction of the measuring device to carry out the non-contact speed measurement essentially aligned perpendicular to the surface of the extruded profile is. If the extrusion tool is not parallel to Press axis is mounted, i.e.
  • the extruded profile exits the die at an angle to the press axis because the exit plane the die at an angle other than 90 ° Press axis occupies, it is generally for retention one essentially perpendicular to the surface of the extruded profile directional measurement direction necessary that the Measuring device with a corresponding inclination of the Measuring direction to the press axis is arranged, the angle the measuring direction to the press axis to the angle of the exit plane the die to the press axis is the same.
  • the extruded profile corresponds to the measuring direction of one Measuring device has inclined surfaces, or with different crowning is provided, it can be advantageous be when the measurement direction is substantially perpendicular an edge of an extruded profile is directed.
  • a preferred non-contact measurement method for measuring the Exit velocity (tangential surface velocity) of the extruded profile is the laser Doppler frequency speed measurement mentioned at the beginning by means of a laser Doppler frequency speed measuring device.
  • Extruded profiles come from one Light metal material, especially made of aluminum or magnesium or aluminum or magnesium alloys, the curved with a, in particular variable radius of curvature become.
  • the invention relates to a device which for Implementation of the procedure described above used which is a tool holder accommodated in a cassette holder, one accommodated in the extrusion die holder Extrusion tool, which extrusion tool a Die with one arranged behind a die exit plane Die mouth, and one downstream of the die mouth Includes deposit and is characterized in that the Device with through holes arranged in alignment with one another through cassette holder, extrusion tool holder and die mouth or deposit is provided.
  • the arrangement for Implementation of the method according to the invention is part of a Extrusion device with the press axis 7.
  • the pressing direction the extrusion device is in the drawing in the direction of the arrow indicated from right to left.
  • the arrangement includes an extrusion die holder accommodated in a cassette slide 4 5. Inside the extrusion tool holder 5, a die 2 with an upstream mandrel part 3 is received. This is downstream of the die exit level 8 Matrix mouth 9, which generally widens in a cone shape (here to simplify the drawing without a conical Expansion shown). Furthermore, the die mouth 9 is the Subsequent deposit 1.
  • the die 2 is at a die inclination angle ⁇ to the press axis 7 installed.
  • the die inclination angle ⁇ is in the embodiment shown 90 °, d. H. the exit level 8 of the die 2 is perpendicular to the press axis 7 of the Plodder.
  • a material to be molded occurs in the specified Direction of arrow in the opening 10 of the extrusion die holder 5 a.
  • the extruded profile enters the die exit plane 8 the die mouth 9 over and enters the opening 11 of the deposit 1, from where the extruded profile into the press flow, i.e. the spout passes over.
  • Exit speed tangential surface speed of the extruded profile
  • a laser Doppler frequency speed measuring device 6 is used to measure the exit speed of the extruded profile.
  • the two partial beams 15, 16 of the laser Doppler frequency speed measuring device 6 pass through the aligned through holes 12, 13, 14 through and meet in the die mouth 9 the extruded profile. From the surface of the extruded profile reflected, the reflected laser beams 17 arrive back into the laser Doppler frequency speed measuring device 6 to determine the tangential surface speed (Exit speed) of the extruded profile.
  • the measuring direction of the laser Doppler frequency speed measuring device 6 takes you to the die inclination angle ⁇ same measuring angle ⁇ to the press axis 7, which in the exemplary embodiment shown is 90 °, so that a optimal measurement of the tangential surface speed the extruded profile is guaranteed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Metal Extraction Processes (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

The method uses a measuring device (6) employing a contactless measuring method, e.g. a laser measuring device, for detecting the velocity of the curved extruded profile within the extrusion press tool behind the exit plane (8) of the extrusion press tool matrix (2), within the mouth (9) of the latter. An independent claim for a device for determining the extruded profile delivery rate within an extrusion press is also included.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Bestimmung der Strangaustrittsgeschwindigkeit von, insbesondere mit variablen Krümmungsradien gekrümmten Strangpressprofilen aus einer Strangpressvorrichtung, nach dem Oberbegriff des Patentanspruchs 1. Des weiteren betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Patentanspruchs 8.The present invention relates to a method for determination the strand exit speed of, in particular with variable radii of curvature from extruded profiles an extrusion device, according to the preamble of the claim 1. The invention further relates to a device to carry out the method according to the preamble of Claim 8.

Herkömmliche Strangpressvorrichtungen umfassen im allgemeinen eine in einem Kassettenhalter aufgenommene Strangpresswerkzeughalterung und ein in der Strangpresswerkzeughalterung aufgenommenes Strangpresswerkzeug. Das Strangpresswerkzeug ist mit einer Matrize ausgerüstet, die mit einem dem Matrizenaustritt nachgeschalteten Matrizenmaul in Form eines Öffnungskegels versehen ist. Falls Hohlprofile gepresst werden sollen, ist der Matrize zudem ein Dornteil vorgeschaltet. Noch innerhalb der Strangpresswerkzeughalterung ist der Matrize, genauer dem Matrizenmaul, gewöhnlich eine Hinterlage nachgeschaltet, welche sich gegen eine in einem Gegenholm aufgenommene Druckplatte stützt, aus welcher schließlich das gepresste Strangpressprofil in der gewünschten Profilform austritt.Conventional extrusion devices generally include an extrusion die holder housed in a cassette holder and one accommodated in the extrusion die holder Extrusion die. The extrusion tool is equipped with a die that exits the die downstream die mouth in the form of an opening cone is provided. If hollow profiles are to be pressed, a mandrel part is also connected upstream of the die. Still inside the extrusion die holder is the die, more precisely the die mouth, usually a deposit, which rests against a pressure plate received in a counter beam supports, from which ultimately the extruded profile emerges in the desired profile shape.

Die Steuerung eines Strangpressvorgangs bzw. die weitere Bearbeitung eines gepressten Strangpressprofils hängt wesentlich von der Austrittsgeschwindigkeit eines Strangpressprofils aus der Strangpressvorrichtung ab. So kann beispielsweise eine exakte Ablängung gekrümmter Strangpressprofile im Pressenfluss, z. B. durch den Einsatz von "Fliegenden Scheren", nur bei Kenntnis der tatsächlichen Austrittsgeschwindigkeit der Strangpressprofile erfolgen, die jedoch zum Teil beträchtlichen Schwankungen unterliegen kann. Eine Messung der tatsächlichen Austrittsgeschwindigkeit eines Strangpressprofils ist demzufolge eine wesentliche Voraussetzung zur Einhaltung exakter Bauteilgeometrien.The control of an extrusion process or further processing of a pressed extruded profile depends essentially from the exit speed of an extruded profile the extrusion device. For example, an exact Cutting of curved extruded profiles in the press flow, z. B. by the use of "flying scissors", only at Knowledge of the actual exit speed of the Extruded profiles are made, which are, however, in some cases considerable May be subject to fluctuations. A measurement of the actual Exit speed of an extruded profile is therefore an essential prerequisite for adherence to exact Component geometries.

Zum technischen Hintergrund wird auf die Patentschrift CH 507752 und die Offenlegungsschrift DE 4210031 A1 verwiesen. CH 507752 beschriebt eine unmittelbar im Presswerkzeug erfolgende Temperaturmessung und DE 4210031 A1 ein Verfahren zur berührungslosen optischen Längenmessung von Materialien mit schwankender Dicke.For technical background reference is made to the patent specification CH 507752 and published patent application DE 4210031 A1. CH 507752 describes one that takes place directly in the pressing tool Temperature measurement and DE 4210031 A1 a method for contactless optical length measurement of materials with fluctuating Thickness.

Es ist bekannt die Austrittsgeschwindigkeit eines Strangpressprofils indirekt über die angelegte Stempelgeschwindigkeit zu ermitteln, wobei der sich ergebende Mengendurchsatz durch Umrechnung ermittelt und anhand der Länge definierter Auslaufstrecken die Austrittsgeschwindigkeit des Strangpressprofil bestimmt wird. Diese indirekte Messmethode ist jedoch wegen der Vielzahl der zur Bestimmung der Austrittsgeschwindigkeit verwendeten Parameter, die ihrerseits Schwankungen unterliegen, mit einer vergleichsweise großen Ungenauigkeit behaftet. Zudem ist ein solches indirektes Messverfahren nicht bei allen Strangpressprofilen zufriedenstellend einsetzbar. So erfordern Strangpressprofile mit einer unterschiedlichen Geometrie, beispielsweise Strangpressprofile mit variablem Krümmungsradius, die Definition einer Vielzahl unterschiedlicher Auslaufstrecken, was in der Praxis oftmals zu erheblichen Schwierigkeiten führt. Aus diesem Grund ist einer direkten Meßmethode der Austrittsgeschwindigkeit eines Strangpressprofils gegenüber der indirekten Meßmethode der Vorzug zu geben. Es ist aus der Patentschrift GB 563893 bekannt die Austrittsgeschwindigkeit eines Strangpressprofils durch ein dem Strangpressprofil im Pressenfluss anliegendes Reibrad direkt zu messen. Hierbei wird das dem Strangpressprofil anliegende Reibrad durch die Reibung zwischen Reibrad und Strangpressprofil in Drehung versetzt, wobei aus der Zahl der Umdrehungen des Reibrads pro Zeiteinheit die Austrittsgeschwindigkeit des Strangpressprofils aus der Strangpressvorrichtung ermittelt wird. Nachteilig bei dieser Meßmethode ist, dass das Reibrad für eine ausreichende Reibung zwischen Reibrad und metallischem Strangpressprofil mit einer hinreichenden Druckkraft gegen das Strangpressprofil gedrückt werden muss, so dass bei dem noch heißen, im allgemeinen weichen, metallischen Strangpressprofil ein Abdruck durch das Reibrad wahrscheinlich ist. Wird das Reibrad andererseits mit einer geringeren Druckkraft gegen das Strangpressprofil gedrückt, so kann ein Schlupf zwischen Reibrad und metallischem Strangpressprofil nicht mehr ausgeschlossen werden, so dass hieraus ein unerwünschter Messfehler resultieren kann. Zudem ist das Reibrad durch das noch heiße Strangpressprofil im Pressenfluss einem starken Verschleiß ausgesetzt und muss dementsprechend häufig ausgewechselt werden, was in unerwünschter Weise zu Betriebsunterbrechungen und teuren Stillstandzeiten der Strangpressvorrichtung führt.The exit speed of an extruded profile is known indirectly via the applied stamp speed determine the resulting volume throughput by conversion determined and based on the length of defined outlet sections the exit speed of the extruded profile is determined. However, this indirect measurement method is because the multitude of for determining the exit speed used parameters, which in turn are subject to fluctuations, with a comparatively large inaccuracy. In addition, such an indirect measurement method is not for everyone Extruded profiles can be used satisfactorily. So require Extruded profiles with a different geometry, for example Extruded profiles with variable radius of curvature, the definition of a large number of different discharge sections, which in practice often leads to considerable difficulties leads. For this reason, a direct measurement method is the exit speed an extruded profile compared to the to give preference to indirect measurement methods. It is from the patent GB 563893 known the exit speed of a Extruded profile through an extruded profile in the Measure the friction flow of the press wheel directly. in this connection is the friction wheel on the extruded profile by the Friction between friction wheel and extruded profile rotated, where from the number of revolutions of the friction wheel per Unit of time the exit speed of the extruded profile is determined from the extrusion device. adversely with this method of measurement is that the friction wheel for a sufficient Friction between the friction wheel and the metallic extruded profile with sufficient pressure against the extruded profile must be pressed so that when the generally a soft, metallic extruded profile through the friction wheel is likely. Will the friction wheel on the other hand, with a lower compressive force against the extruded profile pressed, a slip between the friction wheel and metallic extruded profile can no longer be excluded, so that this results in an undesired measurement error can. In addition, the friction wheel is due to the still hot extruded profile exposed to heavy wear in the press flow and Accordingly, must be replaced frequently, which is undesirable Way to business interruptions and expensive downtimes the extrusion device leads.

Um den Nachteil eines mechanischen Eingriffs auf das Strangpressprofil durch das Reibrad zu vermeiden bzw. um genauere Messungen zu erhalten, wurde bereits ein berührungsloses Lasermessverfahren zur Messung der Austrittsgeschwindigkeit des Strangpressprofils im Pressenfluss in Betracht gezogen. Hierbei handelt es sich um eine Laser-Dopplerfrequenz-Messvorrichtung, bei welcher das Licht einer Laserdiode in einem optoakustischen Modulator (Bragg-Zelle) in zwei Teilstrahlen aufgespaltet wird. Den Teilstrahlen wird zudem eine bestimmte Frequenzverschiebung, beispielsweise 40 MHz, auferlegt. Die beiden Teilstrahlen werden symmetrisch zur Messrichtung unter einem gegengleichen Winkel auf eine Oberfläche des zu messenden Strangpressprofils gerichtet und dort zur Überlagerung gebracht. Durch die Überlagerung der beiden Teilstrahlen entsteht auf der Oberfläche des Strangpressprofils ein Streifenmuster in Form von hellen und dunklen Streifen mit einem bestimmten Streifenabstand, welcher sich aus dem Einfallswinkel der beiden Teilstrahlen und der Wellenlänge ergibt. Durchquert ein Streuteilchen auf der Oberfläche des Strangpressprofils das Interferenzstreifenmuster, streut es immer dann Licht in die Empfangslinse, wenn es gerade in einem Hellfeld ist. Am Detektor entsteht somit eine Intensitätsmodulation aus deren Frequenz sich durch Multiplikation mit dem Streifenabstand die tangentiale Oberflächengeschwindigkeit des Strangpressprofils ergibt.To the disadvantage of mechanical intervention on the extruded profile to avoid by the friction wheel or to be more precise Receiving measurements has already been a non-contact laser measurement process to measure the exit velocity of the Extruded profile considered in the press flow. in this connection is a laser Doppler frequency measuring device, in which the light of a laser diode in an optoacoustic Modulator (Bragg cell) in two partial beams is split up. The partial beams also become a specific one Frequency shift, for example 40 MHz, imposed. The both partial beams are symmetrical to the measuring direction below an opposite angle on a surface of the object to be measured Extruded profile directed and brought there to overlay. The superposition of the two partial beams creates a stripe pattern on the surface of the extruded profile in the form of light and dark stripes with a certain Strip spacing, which results from the angle of incidence of the two partial beams and the wavelength. crossed a scattering particle on the surface of the extruded profile the interference fringe pattern, it always scatters light in the receiving lens when it is currently in a bright field. At the An intensity modulation thus arises from the detector Frequency by multiplying by the strip spacing tangential surface speed of the extruded profile results.

Hieraus ist ersichtlich, dass bei dem Lasermessverfahren ein stets gleichbleibender Einfallswinkel der jeweiligen Teilstrahlen auf die Oberfläche des Strangpressprofils, sowie wegen der notwendigen Überlagerung der Teilstrahlen auf der Oberfläche des Strangpressprofils auch ein stets gleichbleibender Abstand der Lasermessvorrichtung zum Strangpressprofil sichergestellt sein muss. Ist dies nicht der Fall, tritt ein Messfehler auf oder die Messung wird unmöglich. Für eine optimale Messung mit möglichst geringem Messfehler muss die Messrichtung der Lasermessvorrichtung senkrecht zu der zu messenden Oberfläche positioniert werden.From this it can be seen that in the laser measurement method a constant angle of incidence of the respective partial beams on the surface of the extruded profile, and because of the necessary superposition of the partial beams on the surface of the extruded profile also a constant one Distance of the laser measuring device to the extruded profile ensured have to be. If this is not the case, occurs Measurement error on or the measurement becomes impossible. For an optimal Measurement with the smallest possible measurement error must be the direction of measurement the laser measuring device perpendicular to the one to be measured Surface to be positioned.

Eine solche senkrechte Positionierung der Messrichtung der Lasermessvorrichtung relativ zum Strangpressprofil ist jedoch nur bei geraden Strangpressprofilen exakt durchführbar. Bei gekrümmten Strangpressprofilen muss die Lasermessvorrichtung während des Krümmungsvorgangs mit dem durch Einwirken einer seitlichen Krümmungskraft ausgelenkten Strangpressprofil mitgeführt werden, um auf diese Weise einen konstanten Abstand zwischen Lasermessvorrichtung und Strangpressprofil beizubehalten. Zudem muss die Lasermessvorrichtung auf einem Drehlager montiert werden, um eine in Bezug auf das Strangpressprofil annähernd senkrechte Positionierung der Messrichtung der Lasermessvorrichtung relativ zur Oberfläche des Strangpressprofils zu ermöglichen. Dies erfordert sehr komplizierte Nachführbewegungen der Lasermessvorrichtung, die eine aufwändige Steuerung voraussetzen. Jedoch, selbst bei einer optimalen Nachführung der Lasermessvorrichtung mit dem Strangpressprofil, bewirkt die gekrümmte Oberfläche des Strangpressprofils eine faktische Änderung des gerätetechnisch vorgegebenen gegengleichen Einfallswinkels der Teilstrahlen auf die Oberfläche des Strangpressprofils, wodurch verhindert wird, dass die tangentiale Geschwindigkeit des Strangpressprofils gemessen wird. Dieses Effekt tritt umso stärker auf, je größer die Krümmung des Strangpressprofils ist.Such a vertical positioning of the measuring direction of the laser measuring device is relative to the extruded profile, however only feasible with straight extruded profiles. at The laser measuring device must have curved extruded profiles during the curving process with the action of a lateral extruded profile deflected along to be a constant distance in this way between the laser measuring device and the extruded profile. In addition, the laser measuring device must be on a pivot bearing to be mounted in relation to the extruded profile approximately vertical positioning of the measuring direction of the Laser measuring device relative to the surface of the extruded profile to enable. This requires very complicated tracking movements the laser measuring device, which is a complex Require control. However, even with an optimal one Tracking of the laser measuring device with the extruded profile, causes the curved surface of the extruded profile a de facto change of the counterparts specified in terms of device technology Angle of incidence of the partial beams on the surface of the extruded profile, which prevents the tangential speed of the extruded profile measured becomes. The greater the effect, the greater the effect Is curvature of the extruded profile.

Soll die Austrittsgeschwindigkeit von Strangpressprofilen mit variablem Krümmungsradius im Pressenfluss mittels des Lasermessverfahrens gemessen werden, so ist für jedes unterschiedlich gekrümmte Strangpressprofil eine verschiedene Steuerung der Lasermessvorrichtung notwendig, was in der Praxis kaum mehr handhabbar ist.Should the exit speed of extruded profiles with variable radius of curvature in the press flow using the laser measurement process measured, so is different for each curved extrusion profile a different control the laser measuring device necessary, which is hardly in practice is more manageable.

Demgegenüber ist es Aufgabe der vorliegenden Erfindung ein einfaches und exaktes Verfahren zur berührungslosen Messung der Austrittsgeschwindigkeit von Strangpressprofilen und eine Vorrichtung zur Durchführung des Verfahrens bereitzustellen. Ein solches Verfahren soll nicht nur bei geraden Strangpressprofilen, sondern auch bei gekrümmten Strangpressprofilen, insbesondere Strangpressprofilen mit variablem Krümmungsradius, in einfacher Weise eingesetzt werden können.In contrast, it is an object of the present invention simple and precise method for non-contact measurement the exit speed of extruded profiles and a To provide device for performing the method. Such a process should not only be used for straight extruded profiles, but also with curved extruded profiles, especially extruded profiles with variable radius of curvature, can be used in a simple manner.

Diese Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren zur Bestimmung der Strangaustrittsgeschwindigkeit von, insbesondere mit variablen Krümmungsradien gekrümmten, Strangpressprofilen aus einer Strangpressvorrichtung, welche eine in einem Kassettenhalter aufgenommene Strangpresswerkzeughalterung und ein in der Strangpresswerkzeughalterung aufgenommenes Strangpresswerkzeug, welches Strangpresswerkzeug eine Matrize mit einem hinter einer Matrizenaustrittsebene angeordneten Matrizenmaul, und eine dem Matrizenmaul nachgeschaltete Hinterlage umfasst, welches Verfahren dadurch gekennzeichnet ist, dass die Strangpressgeschwindigkeit des Strangpressprofils innerhalb des Strangpresswerkzeugs hinter der Matrizenaustrittsebene mittels einer Messvorrichtung zur Durchführung eines berührungslosen Messverfahrens gemessen wird.According to the invention, this object is achieved by a method to determine the strand exit speed of, in particular with variable radii of curvature, extruded profiles from an extrusion device, which one in one Extrusion tool holder accommodated in the cassette holder and one accommodated in the extrusion die holder Extrusion tool, which extrusion tool is a die with one arranged behind a die exit plane Die mouth, and a deposit downstream of the die mouth which method is characterized by that the extrusion speed of the extrusion profile within of the extrusion tool behind the die exit plane by means of a measuring device for carrying out a contactless Measuring method is measured.

Wie die Anmelderin feststellen konnte, weichen Strangpressprofile mit unterschiedlichem Krümmungsradius erst bei Austritt aus dem Strangpresswerkzeug in deren Bahn deutlich voneinander ab. Mit anderen Worten, Strangpressprofile mit unterschiedlichem Krümmungsradius verlaufen innerhalb des Strangpresswerkzeugs im wesentlichen auf der gleichen Bahn. Die Abweichungen der unterschiedlich gekrümmten Strangpressprofile sind für den Zweck der Messung der tangentialen Oberflächengeschwindigkeit vernachlässigbar klein. Durch das erfindungsgemäße Messverfahren kann deshalb die tangentiale Oberflächengeschwindigkeit (Austrittsgeschwindigkeit) des Strangpressprofils exakt und einfach gemessen werden, ohne dass bei gekrümmten Strangpressprofilen komplizierte und aufwändige Nachführbewegungen der Messvorrichtung erforderlich wären. Selbst bei Strangpressprofilen, die mit einem unterschiedlichen Krümmungsradius gekrümmt werden, können ohne Veränderung der Positionierung/Ausrichtung der Messvorrichtung exakte Messungen gewonnen werden, da, wie oben erwähnt, eine unterschiedliche Krümmung der Strangpressprofile im wesentlichen keine Veränderung der Bahn der Strangpressprofile innerhalb des Strangpresswerkzeugs hervorruft. As the applicant was able to determine, extruded profiles give way with different radius of curvature only at the exit from the extrusion tool in their path clearly from each other from. In other words, extruded profiles with different Radius of curvature run inside the extrusion tool essentially on the same track. The deviations of the differently curved extruded profiles are for the Purpose of measuring the tangential surface speed negligible small. By the measuring method according to the invention can therefore the tangential surface speed (Exit speed) of the extruded profile exactly and can be measured easily without using curved extruded profiles complicated and complex tracking movements of the Measuring device would be required. Even with extruded profiles, which are curved with a different radius of curvature can be done without changing the positioning / orientation the measuring device obtained exact measurements become, as mentioned above, a different curvature the extruded profiles essentially no change in Path of the extruded profiles within the extrusion tool causes.

Bei einer vorteilhaften Ausführungsform der Erfindung wird die Strangpressgeschwindigkeit des Strangpressprofils im Matrizenmaul gemessen. Alternativ hierzu kann die Strangpressgeschwindigkeit des Strangpressprofils in der dem Matrizenmaul nachgeschalteten Hinterlage gemessen werden.In an advantageous embodiment of the invention, the Extrusion speed of the extrusion profile in the die mouth measured. Alternatively, the extrusion speed of the extruded profile in the downstream of the die mouth Deposit are measured.

Hierbei ist es zur optimalen Durchführung der Messung bevorzugt, dass die Messrichtung der Messvorrichtung zur Durchführung der berührungslosen Geschwindigkeitsmessung im wesentlichen senkrecht zur Oberfläche des Strangpressprofils ausgerichtet ist. Falls das Strangpresswerkzeug nicht parallel zur Pressachse montiert ist, d.h. wenn das Strangpressprofil schräg zur Pressachse aus der Matrize austritt, weil die Austrittsebene der Matrize einen von 90° verschiedenen Winkel zur Pressachse einnimmt, ist es im allgemeinen zur Beibehaltung einer im wesentlichen senkrecht zur Oberfläche des Strangpressprofils gerichteten Messrichtung notwendig, dass die Messvorrichtung mit einer dementsprechenden Schrägstellung der Messrichtung zur Pressachse angeordnet ist, wobei der Winkel der Messrichtung zur Pressachse zu dem Winkel der Austrittsebene der Matrize zur Pressachse gleich ist.In order to carry out the measurement optimally, it is preferred that the measuring direction of the measuring device to carry out the non-contact speed measurement essentially aligned perpendicular to the surface of the extruded profile is. If the extrusion tool is not parallel to Press axis is mounted, i.e. if the extruded profile exits the die at an angle to the press axis because the exit plane the die at an angle other than 90 ° Press axis occupies, it is generally for retention one essentially perpendicular to the surface of the extruded profile directional measurement direction necessary that the Measuring device with a corresponding inclination of the Measuring direction to the press axis is arranged, the angle the measuring direction to the press axis to the angle of the exit plane the die to the press axis is the same.

Falls das Strangpressprofil zu der Messrichtung einer eingerichteten Messvorrichtung schräge Flächen aufweist, bzw. mit verschiedenen Bombierungen versehen ist, so kann es vorteilhaft sein, wenn die Messrichtung im wesentlichen senkrecht auf eine Kante eines Strangpressprofils gerichtet ist.If the extruded profile corresponds to the measuring direction of one Measuring device has inclined surfaces, or with different crowning is provided, it can be advantageous be when the measurement direction is substantially perpendicular an edge of an extruded profile is directed.

Ein bevorzugtes berührungsloses Messverfahren zur Messung der Austrittsgeschwindigkeit (tangentiale Oberflächengeschwindigkeit) des Strangpressprofils ist die eingangs genannte Laser-Dopplerfrequenz-Geschwindigkeitsmessung mittels einer Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung. A preferred non-contact measurement method for measuring the Exit velocity (tangential surface velocity) of the extruded profile is the laser Doppler frequency speed measurement mentioned at the beginning by means of a laser Doppler frequency speed measuring device.

Als Strangpressprofile kommen Strangpressprofile aus einem Leichtmetallwerkstoff, insbesondere aus Aluminium oder Magnesium bzw. Aluminium- oder Magnesiumlegierungen in Betracht, die mit einem, insbesondere variablen Krümmungsradius, gekrümmt werden.Extruded profiles come from one Light metal material, especially made of aluminum or magnesium or aluminum or magnesium alloys, the curved with a, in particular variable radius of curvature become.

Ferner betrifft die Erfindung eine Vorrichtung, welche zur Durchführung des oben dargestellten Verfahrens eingesetzt wird, welche eine in einem Kassettenhalter aufgenommene Werkzeughalterung, ein in der Strangpresswerkzeughalterung aufgenommenes Strangpresswerkzeug, welches Strangpresswerkzeug eine Matrize mit einem hinter einer Matrizenaustrittsebene angeordneten Matrizenmaul, und eine dem Matrizenmaul nachgeschalteten Hinterlage umfasst und dadurch gekennzeichnet ist, dass die Vorrichtung mit zueinander fluchtend angeordneten Durchgangsbohrungen durch Kassettenhalter, Strangpresswerkzeughalterung und Matrizenmaul oder Hinterlage versehen ist.Furthermore, the invention relates to a device which for Implementation of the procedure described above used which is a tool holder accommodated in a cassette holder, one accommodated in the extrusion die holder Extrusion tool, which extrusion tool a Die with one arranged behind a die exit plane Die mouth, and one downstream of the die mouth Includes deposit and is characterized in that the Device with through holes arranged in alignment with one another through cassette holder, extrusion tool holder and die mouth or deposit is provided.

Falls das Strangpresswerkzeug nicht zur Pressachse ausgerichtet ist, sondern die Austrittsebene der Matrize einen von 90° verschiedenen Winkel α zur Pressachse einnimmt, so ist die Fluchtrichtung der Durchgangsbohrungen von Kassettenhalter, Strangpresswerkzeughalterung und Matrizenmaul oder Hinterlage in dem gleichen Winkel α wie das Strangpresswerkzeug zur Pressachse schräg gestellt.If the extrusion tool is not aligned with the press axis but the exit plane of the die is 90 ° takes different angle α to the press axis, so is Direction of escape of the through holes of the cassette holder, Extrusion tool holder and die mouth or backing at the same angle α as the extrusion tool to the press axis slanted.

Die Erfindung wird nun anhand eines Ausführungsbeispiels näher erläutert, wobei Bezug auf die beigefügte Zeichnung genommen wird.

Fig. 1
zeigt einen Längsschnitt in der Pressachse durch eine erfindungsgemäße Anordnung innerhalb einer Strangpressvorrichtung zur Durchführung des erfindungsgemäßen Verfahrens.
The invention will now be explained in more detail using an exemplary embodiment, reference being made to the accompanying drawing.
Fig. 1
shows a longitudinal section in the press axis through an arrangement according to the invention within an extrusion device for performing the method according to the invention.

Es sei Figur 1 betrachtet. Die erfindungsgemäße Anordnung zur Durchführung des erfindungsgemäßen Verfahrens ist Teil einer Strangpressvorrichtung mit der Pressachse 7. Die Pressrichtung der Strangpressvorrichtung ist in der Zeichnung in Pfeilrichtung von rechts nach links angegeben. Die Anordnung umfasst eine in einem Kassettenschieber 4 aufgenommene Strangpresswerkzeughalterung 5. Innerhalb der Strangpresswerkzeughalterung 5 ist eine Matrize 2 mit vorgeschaltetem Dornteil 3 aufgenommen. Der Matrizenaustrittsebene 8 nachgeschaltet ist das Matrizenmaul 9, welches sich im allgemeinen konusförmig aufweitet (hier zur Vereinfachung der Zeichnung ohne konusförmige Aufweitung dargestellt). Ferner ist dem Matrizenmaul 9 die Hinterlage 1 nachgeschaltet.Let us consider Figure 1. The arrangement for Implementation of the method according to the invention is part of a Extrusion device with the press axis 7. The pressing direction the extrusion device is in the drawing in the direction of the arrow indicated from right to left. The arrangement includes an extrusion die holder accommodated in a cassette slide 4 5. Inside the extrusion tool holder 5, a die 2 with an upstream mandrel part 3 is received. This is downstream of the die exit level 8 Matrix mouth 9, which generally widens in a cone shape (here to simplify the drawing without a conical Expansion shown). Furthermore, the die mouth 9 is the Subsequent deposit 1.

Die Matrize 2 ist mit einem Matrizenneigungswinkel α zur Pressachse 7 eingebaut. Der Matrizenneigungswinkel α beträgt in dem gezeigten Ausführungsbeispiels 90°, d. h. die Austrittsebene 8 der Matrize 2 ist senkrecht zur Pressachse 7 der Strangpressvorrichtung.The die 2 is at a die inclination angle α to the press axis 7 installed. The die inclination angle α is in the embodiment shown 90 °, d. H. the exit level 8 of the die 2 is perpendicular to the press axis 7 of the Plodder.

Beim Strangpressen tritt ein zu formendes Material in der angegebenen Pfeilrichtung in die Öffnung 10 der Strangpresswerkzeughalterung 5 ein. Von Dornteil 3 und Matrize 2 geformt, tritt das Strangpressprofil an der Matrizenaustrittsebene 8 in das Matrizenmaul 9 über und gelangt in die Öffnung 11 der Hinterlage 1, von wo aus das Strangpressprofil in den Pressenfluss, d.h. den Auslauf, übergeht.During extrusion, a material to be molded occurs in the specified Direction of arrow in the opening 10 of the extrusion die holder 5 a. Formed by mandrel part 3 and die 2, the extruded profile enters the die exit plane 8 the die mouth 9 over and enters the opening 11 of the deposit 1, from where the extruded profile into the press flow, i.e. the spout passes over.

Zur Messung der tangentialen Oberflächengeschwindigkeit (d. h. Austrittsgeschwindigkeit) des Strangpressprofils sind der Kassettenschieber 4, die Strangpresswerkzeughalterung 5 und das Matrizenmaul 5 mit fluchend angeordneten Durchgangsbohrungen 12, 13, 14 versehen. Eine Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung 6 dient zur Messung der Austrittsgeschwindigkeit des Strangpressprofils. Die beiden Teilstrahlen 15, 16 der Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung 6 treten durch die fluchtend angeordneten Durchgangsbohrungen 12, 13, 14 hindurch und treffen im Matrizenmaul 9 auf das Strangpressprofil. Von der Oberfläche des Strangpressprofils reflektiert, gelangen die reflektierten Laserstrahlen 17 wieder in die Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung 6 zur Bestimmung der tangentialen Oberflächengeschwindigkeit (Austrittsgeschwindigkeit) des Strangpressprofils. Die Messrichtung der Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung 6 nimmt einen zum Matrizenneigungswinkel α gleichen Messwinkel α zur Pressachse 7 ein, welcher im gezeigten Ausführungsbeispiel 90° beträgt, so dass eine optimale Messung der tangentialen Oberflächengeschwindigkeit des Strangpressprofils gewährleistet ist.To measure the tangential surface speed (i.e. Exit speed) of the extruded profile are the cassette slide 4, the extrusion die holder 5 and that Die mouth 5 with cursed through holes 12, 13, 14 provided. A laser Doppler frequency speed measuring device 6 is used to measure the exit speed of the extruded profile. The two partial beams 15, 16 of the laser Doppler frequency speed measuring device 6 pass through the aligned through holes 12, 13, 14 through and meet in the die mouth 9 the extruded profile. From the surface of the extruded profile reflected, the reflected laser beams 17 arrive back into the laser Doppler frequency speed measuring device 6 to determine the tangential surface speed (Exit speed) of the extruded profile. The measuring direction of the laser Doppler frequency speed measuring device 6 takes you to the die inclination angle α same measuring angle α to the press axis 7, which in the exemplary embodiment shown is 90 °, so that a optimal measurement of the tangential surface speed the extruded profile is guaranteed.

Claims (9)

Verfahren zur Bestimmung der Strangaustrittsgeschwindigkeit von, insbesondere mit variablen Krümmungsradien gekrümmten, Strangpressprofilen aus einer Strangpressvorrichtung, welche eine in einem Kassettenhalter (4) aufgenommene Strangpresswerkzeughalterung (5), ein in der Strangpresswerkzeughalterung (5) aufgenommenes Strangpresswerkzeug, welches Strangpresswerkzeug eine Matrize (2) mit einem hinter einer Matrizenaustrittsebene (8) angeordneten Matrizenmaul (9), und eine dem Matrizenmaul (9) nachgeschaltete Hinterlage (1) umfasst, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit des Strangpressprofils innerhalb des Strangpresswerkzeugs hinter der Matrizenaustrittsebene (8) mittels einer Messvorrichtung (6) zur Durchführung eines berührungslosen Messverfahrens gemessen wird.Method for determining the extrusion speed of extrusion profiles, in particular those which are curved with variable radii of curvature, from an extrusion device, which an extrusion tool holder (5) accommodated in a cassette holder (4), an extrusion tool accommodated in the extrusion die holder (5), the extrusion die comprising a die (2) with a die mouth (9) arranged behind a die exit plane (8), and a backing (1) arranged downstream of the die mouth (9), characterized in that the extrusion speed of the extrusion profile inside the extrusion tool behind the die exit plane (8) is measured by means of a measuring device (6) for carrying out a contactless measuring method. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit des Strangpressprofils im Matrizenmaul (9) gemessen wird.A method according to claim 1, characterized in that the extrusion speed of the extruded profile is measured in the die mouth (9). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit des Strangpressprofils in der Hinterlage (1) gemessen wird.A method according to claim 1, characterized in that the extrusion speed of the extruded profile is measured in the backing (1). Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass eine Messrichtung der Messvorrichtung (6) zur Durchführung eines berührungslosen Messverfahrens im wesentlichen senkrecht zur Oberfläche des Strangpressprofils ausgerichtet wird.Method according to Claim 1, 2 or 3, characterized in that a measuring direction of the measuring device (6) for carrying out a contactless measuring method is oriented essentially perpendicular to the surface of the extruded profile. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Messrichtung der Messvorrichtung (6) im wesentlichen senkrecht auf eine Kante eines Strangpressprofils ausgerichtet wird.A method according to claim 4, characterized in that the measuring direction of the measuring device (6) is aligned substantially perpendicular to an edge of an extruded profile. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass bei einem Strangpresswerkzeug, bei welchem die Matrizenaustrittsebene (8) einen von 90° verschiedenen Winkel α zur Pressachse (7) einnimmt, die Messrichtung der Messvorrichtung (6) nach dem gleichen Winkel α zur Pressachse (7) ausgerichtet wird.Method according to Claim 4 or 5, characterized in that, in the case of an extrusion tool in which the die exit plane (8) assumes an angle α to the press axis (7) which is different from 90 °, the measuring direction of the measuring device (6) according to the same angle α to the press axis (7) is aligned. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Strangpressgeschwindigkeit des Strangpressprofils mittels einer Laser-Dopplerfrequenz-Geschwindigkeitsmessvorrichtung gemessen wird.Method according to one of the preceding claims, characterized in that the extrusion speed of the extrusion profile is measured by means of a laser Doppler frequency speed measuring device. Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, welche eine in einem Kassettenhalter (4) aufgenommene Werkzeughalterung (5), ein in der Strangpresswerkzeughalterung (5) aufgenommenes Strangpresswerkzeug, welches Strangpresswerkzeug eine Matrize (2) mit einem hinter einer Matrizenaustrittsebene (8) angeordneten Matrizenmaul (9), und eine dem Matrizenmaul (9) nachgeschalteten Hinterlage (1) umfasst, dadurch gekennzeichnet, dass die Vorrichtung mit zueinander fluchtend angeordneten Durchgangsbohrungen (12, 13, 14) durch Kassettenhalter 4, Strangpresswerkzeughalterung (5) und Matrizenmaul (9) oder Hinterlage (1) versehen ist. Device for carrying out the method according to one of the preceding claims, which has a tool holder (5) accommodated in a cassette holder (4), an extrusion tool accommodated in the extrusion tool holder (5), which extrusion tool has a die (2) with a die exit plane (8) behind it. arranged die mouth (9), and a backing (1) downstream of the die mouth (9), characterized in that the device with through holes (12, 13, 14) arranged in alignment with one another by cassette holder 4, extrusion die holder (5) and die mouth (9 ) or deposit (1) is provided. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass bei einem Strangpresswerkzeug, bei welchem die Matrizenaustrittsebene (8) einen von 90° verschiedenen Winkel α zur Pressachse (7) einnimmt, die Fluchtrichtung der zueinander fluchtend angeordneten Durchgangsbohrungen (12, 13, 14) durch Kassettenhalter (4), Strangpresswerkzeughalterung (5) und Matrizenmaul (9) oder Hinterlage (1) den gleichen Winkel α zur Pressachse (7) einnimmt.Apparatus according to claim 8, characterized in that in the case of an extrusion tool in which the die exit plane (8) assumes an angle α to the press axis (7) which differs from 90 °, the direction of escape of the through-bores (12, 13, 14) arranged in alignment with one another is achieved by cassette holders (4), extrusion die holder (5) and die jaw (9) or backing (1) at the same angle α to the press axis (7).
EP04012081A 2003-06-05 2004-05-21 Method of determining the exit speed of extruded profiles and device for carrying out the method Expired - Lifetime EP1484122B1 (en)

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DE10325469A DE10325469B3 (en) 2003-06-05 2003-06-05 Extruded profile delivery rate determination method for extrusion press using measuring device employing contactless measuring method within extrusion press tool

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CN113600632A (en) * 2021-06-26 2021-11-05 中国重型机械研究院股份公司 Extrusion container exhaust device and using method

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FR1448841A (en) * 1964-05-06 1966-08-12 Decca Ltd Improvements in industrial process control
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