EP3235593B1 - Moulding device for cutting of materials - Google Patents

Moulding device for cutting of materials Download PDF

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Publication number
EP3235593B1
EP3235593B1 EP17000578.9A EP17000578A EP3235593B1 EP 3235593 B1 EP3235593 B1 EP 3235593B1 EP 17000578 A EP17000578 A EP 17000578A EP 3235593 B1 EP3235593 B1 EP 3235593B1
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EP
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Prior art keywords
engagement contour
suction
cutting
tool insert
opening
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EP17000578.9A
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German (de)
French (fr)
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EP3235593A1 (en
Inventor
Robert Canti
Wilfried VETTE
Emmanuel Conter
Jörg Schneid
Rafael Dreier
Stefan Sanhieter
Christian Disch
Ludwig Schaller
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Audi AG
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Audi AG
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Publication of EP3235593A1 publication Critical patent/EP3235593A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action

Definitions

  • the invention relates to a shaping tool for cutting metal or non-metal materials with at least one base body on which at least one tool insert with an engagement contour is arranged.
  • Shaping tools are used to perform cutting processes on metal or non-metal materials. These shaping tools are used for the production of small, but in particular large sheet metal components of a vehicle. As a rule, thin-walled starting materials such as sheet steel or sheet aluminum are used, with special shaping tools being required for each individual body part.
  • the shaping tools include tool inserts with an engagement contour for realizing the cutting processes and are manufactured as separate components and connected to a base body, which can be a lower tool part, an upper tool part or a slide.
  • tinsel When cutting sheet metal, especially when cutting sheets made of aluminum alloys, so-called tinsel is created.
  • a forming tool as a dividing tool in which flakes are extracted through channels integrated into the tool.
  • a punch and a hold-down device are moved relative to a die, a workpiece being clamped between the hold-down device and the die and then divided.
  • suction openings are provided in the die as well as in the punch below the hold-down device, which are connected to suction channels in the die, in the punch and the hold-down device.
  • suction channels are connected on the outside to a common discharge line.
  • a vacuum in the area of the suction openings is provided by means of a vacuum pump which is installed in the discharge line.
  • a disadvantage of this suction device for flakes is that the entire tool needs to be sealed in order to achieve the necessary suction power in the area of the cutting edges of the tool.
  • a device for trimming molded parts by means of a deep-drawing press for body parts which is equipped with a cutting knife with a suction device designed as a Venturi nozzle for suctioning off material particles produced during trimming.
  • This Venturi nozzle comprises a suction channel opening adjacent to the cutting edge, a supply channel that can be acted upon by compressed air, and a discharge channel for material particles.
  • a Venturi nozzle cannot always be integrated.
  • a tool base of a punch press tool comprises according to FIG JP 2005 014034 A a die body with a die tip held therein. Slit-shaped openings are arranged around the die tip and open into a die channel of the die body running axially below the die tip. This die channel continues as an axial discharge channel through the tool base to its lower end. In order to discharge the flakes produced during the punching and embossing of a thin and plate-like workpiece via this discharge channel, a vacuum pump using the Coanda effect is provided in the area of the same.
  • the DE 10 2014 200 198 A1 describes a device for the machining of a metallic component, with which, with the machining of a surface of the metallic component exposed to wear, the wear on the surface is reduced without the application of a coating.
  • a closed, vacuum-compatible housing is used to accommodate part of the surface to be machined of the metallic component, the vacuum-compatible housing being fluidically connected to a vacuum generating means for generating a low-oxygen environment in the vacuum-compatible housing.
  • the metallic component is made of an iron-based material
  • the negative pressure inside the housing which is suitable for negative pressure, leads to a lowering of the oxygen content and reduces the formation of the iron oxide Fe 2 O 3 .
  • the wear-reducing oxide Fe 3 O 4 is formed.
  • a punching device for punching large sheet metal parts, such as a body side wall in which with the punching out of the outer contour of such a sheet metal part, the resulting waste is also divided by means of a cutting device with two shear blades.
  • a circular suction tube is arranged in the area of the lower cutting edge of the cutting device.
  • the JP H11 151537 A describes a punching device with a suction device in the area of lower cutting edges with a trumpet-like opening.
  • the EP 0 958 092 B1 a milling device for milling the welding area of welded sheet metal parts, which has a vacuum pump for sucking off chips generated during milling.
  • vacuum pumps are proposed which use the Coanda effect or the Bernoulli effect to generate a negative pressure.
  • a vacuum is generated by means of an air flow guided through a flow channel 11 of a tubular pump body 10.1.
  • this flow channel 11 begins with an inlet opening 12 with an inlet cross-sectional area which tapers conically in the axial direction of the pump body 10.1 to a cross-sectional constriction 13 with a minimal passage area.
  • annular gap 14 is fed with compressed air 16 from an annular chamber 15 which is under overpressure.
  • the air entering the flow channel 11 from the annular chamber 15 through the annular gap 14 and flowing along the widening wall of the flow channel 11 due to the Coanda effect causes an air flow in the flow channel 11 that breaks the air lying in front of the gap 14 in the axial direction L1 sucks in and carries away.
  • the outlet air flow L2 can be regulated solely by changing the annular gap 14 and the pressure of the compressed air 16. In particular, with such a vacuum pump 10 it is possible to achieve a high pumping speed with low air consumption.
  • the shaping tool has a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.
  • the suction nozzle is arranged on the cutting knife with respect to a cutting surface of the cutting knife opposite the cutting edge in such a way that the nozzle opening is in the normal direction of an active surface of the engagement contour, ie a cutting surface of the cutting edge opposite the plane of this active surface or Cutting surface has a protrusion.
  • the tinsel can be sucked off directly into the nozzle opening in the cutting direction before it can spread in the shaping tool.
  • the suction nozzle is arranged on the cutting knife in such a way that the nozzle opening is offset inwardly in relation to a plane of an active surface of the engagement contour, i.e. a cutting surface of the cutting edge with respect to the tool insert or the cutting knife. In this way, the part separated from the workpiece is not hindered by the suction nozzle when it falls down.
  • the suction nozzle of the suction device for flakes is implemented in the tool insert and the base body as a suction channel, the suction opening of which is arranged in the area of the engagement contour and the evacuation opening, which is connected to the vacuum pump via a pipe or a hose, in the area of the Base body is.
  • the Coanda effect is used in the vacuum pump.
  • the shaping tool is designed with a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.
  • the Figures 2 and 3 show of a shaping tool 1 for shearing a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1, this tool insert 3 being arranged on a schematically indicated base body 2 as the lower tool part of the shaping tool 1.
  • This suction nozzle 4 has a slot-shaped nozzle opening 4.1 with a rectangular, oval or elliptical opening cross section and extends in the direction of the engagement contour 3.1, that is to say the cutting edge, for example parallel to the direction of the engagement contour 3.1.
  • the suction nozzle 4 designed as a slot nozzle is designed to widen conically in the direction of the engagement contour 3.1, that is to say in the direction of the cutting edge.
  • These components that is to say the suction nozzle 4, the hose 5 and the vacuum pump 10, form part of a suction device for suctioning off flakes, as shown below with reference to FIG Figure 4 is explained.
  • Such a suction device of a shaping tool 1 with a tool insert 3 according to FIGS Figures 2 and 3 includes according to Figure 4 as a central unit, the vacuum pump 10 using the Coanda effect with a correspondingly from Figure 1 basic structure shown.
  • This vacuum pump 10 has a compressed air connection 17 for supplying compressed air 16 into the annular chamber 15.
  • This vacuum pump 10 is connected to the suction nozzle 4 arranged in the area of the engagement contour 3.1 of the tool insert 3 of the shaping tool via the hose 5, so that the flakes F produced in the area of the engagement contour 3.1 are sucked off.
  • the exhaust air containing this flake F is passed via a pipe or a hose 6 into a collecting container 7 in which the flake F is collected.
  • the vacuum pump 10 is thus integrated into the shaping tool 1 between the area of the cutting edge as engagement contour 3.1 and the collecting container 7, whereby the suction power, for example the length of the hoses 5 and 6 used, can be adjusted through the position of the vacuum pump 10.
  • the arrangement of the suction nozzle 4 on the tool insert 3, which is designed as a cutting knife, can according to FIGS Figures 2 and 3 done in different ways.
  • the cutting edge as engagement contour 3.1 merges into an active surface 3.2, which represents the cutting surface of the cutting edge and into the Figures 2 and 3 is designated as level E.
  • the suction nozzle 4 arranged opposite the engagement contour 3.1 in the area of the active surface 3.2 is offset inwardly in relation to the plane E in the direction of the tool insert 3 such that the plane E does not intersect the nozzle opening 4.1.
  • a part separated from a workpiece by means of the cutting edge as engagement contour 3.1 is not hindered by the suction nozzle 4 when it falls down, since the suction nozzle 4 does not protrude from this active surface 3.2.
  • the suction nozzle 4 is arranged on the tool insert 3 in such a way that an overhang a is produced.
  • the nozzle opening 4.1 is offset to the outside in the normal direction of the active surface 3.2 of the engagement contour 3.1 with respect to the plane E in relation to the tool insert 3.
  • the tinsel F can thus be sucked off directly into the nozzle opening 4.1 in the cutting direction before it can spread in the shaping tool 1.
  • the Figure 5 shows a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1.
  • This tool insert 3 is arranged on a base body 2 of a shaping tool 1, the base body forming a lower tool part of this shaping tool 1.
  • this suction channel 8 with the suction opening 8.1 and the discharge opening 8.2 is shown as a separate element. It can be seen from this that the suction channel 8, beginning with the discharge opening 8.2, initially has a circular cross section, which then merges into a rectangular cross section, which then ends in the slit-shaped cross section of the suction opening 8.1.
  • Several suction openings 8.1 can also be implemented in the tool insert 3.1 by, for example, branching off several sections with rectangular cross-sections from the section of the suction channel 8 with a circular cross-section, each of which ends in a suction opening.
  • the individual cross-sections can have any geometry.
  • the suction opening 8.1 is according to the Figures 5 and 6 designed as a slit nozzle with a narrow slot and extends in the direction of the engagement contour 3.1 designed as a cutting edge, for example parallel to the direction of the engagement contour 3.1.
  • a connecting piece is flanged to the discharge opening 8.2 of the suction channel 8 of the tool insert 3 and is connected to a vacuum pump 10 via a hose 5.
  • This suction channel 8 thus constitutes a component of the in Figure 4 illustrated suction device of the forming tool 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

Die Erfindung betrifft ein Formgebungswerkzeug zum Trennen von Metall- oder Nichtmetallwerkstoffen mit wenigstens einem Grundkörper, an welchem wenigstens ein Werkzeugeinsatz mit einer Eingriffskontur angeordnet ist.The invention relates to a shaping tool for cutting metal or non-metal materials with at least one base body on which at least one tool insert with an engagement contour is arranged.

Mit Formgebungswerkzeugen werden Schneid prozesse an Metall- oder Nichtmetallwerkstoffen durchgeführt. Diese Formgebungswerkzeuge werden zur Herstellung von kleinen, insbesondere jedoch großen Blechbauteilen eines Fahrzeugs eingesetzt. Dabei werden in der Regel dünnwandige Ausgangsmaterialien, wie Stahlblech- oder Aluminiumblechbahnen verwendet, wobei für jedes einzelne Karosserieteil spezielle Formgebungswerkzeuge erforderlich sind.Shaping tools are used to perform cutting processes on metal or non-metal materials. These shaping tools are used for the production of small, but in particular large sheet metal components of a vehicle. As a rule, thin-walled starting materials such as sheet steel or sheet aluminum are used, with special shaping tools being required for each individual body part.

Die Formgebungswerkzeuge umfassen Werkzeugeinsätze mit einer Eingriffskontur zur Realisierung der Schneidprozesse und werden als separate Bauteile hergestellt und mit einem Grundkörper, der ein Werkzeugunterteil, ein Werkzeugoberteil oder auch ein Schieber sein kann, verbunden.The shaping tools include tool inserts with an engagement contour for realizing the cutting processes and are manufactured as separate components and connected to a base body, which can be a lower tool part, an upper tool part or a slide.

Beim Zerteilen von Blechen, insbesondere beim Trennen von Blechen aus Aluminiumlegierungen entsteht sogenannter Flitter. Damit werden allgemein Werkstoffpartikel bezeichnet, die sich beim Vorgang der Materialtrennung aus der Schnittfläche oder Oberfläche des Blechs ablösen können. Flitter kann dabei in kleinen Partikeln als Staub, aber auch insbesondere beim Zerteilen mit größerer Partikelgröße zum Beispiel in Form von Spänen entstehen.When cutting sheet metal, especially when cutting sheets made of aluminum alloys, so-called tinsel is created. This generally refers to material particles that can be detached from the cut surface or surface of the sheet metal during the process of material separation. Flitter can arise in small particles as dust, but also especially when breaking up larger particle sizes, for example in the form of chips.

Eine solche Flitterentstehung ist während des Produktionsprozesses ungünstig, da Flitter nach einer Aufwirbelung auf Bauteiloberflächen und/oder Werkzeugen gelangen und dann zu optisch sichtbaren, unzulässigen Spanabdrücken am Bauteil führen kann. Dadurch ergibt sich insbesondere bei Aluminium-Karosserieaußenhautteilen (im Vergleich zu Stahlaußenhautteilen) ein erhöhter kostenintensiver Ausschuss. Zudem führt Flitter zu einem erhöhten Reinigurigsaufwand bei der Produktion und Werkzeugwartung und damit zu ungünstigen längeren und häufigeren Werkzeugstillständen.Such tinsel formation is unfavorable during the production process, since tinsel after being whirled up on component surfaces and / or tools and can then lead to optically visible, impermissible chip marks on the component. This results in an increased, cost-intensive scrap, particularly in the case of aluminum body outer skin parts (compared to steel outer skin parts). In addition, Flitter leads to an increased cleaning effort in production and tool maintenance and thus to unfavorable longer and more frequent tool downtimes.

In der DE 103 57 923 A1 ist ein Umformwerkzeug als Zerteilwerkzeug beschrieben, bei dem Flitter durch werkzeugintegrierte Kanäle abgesaugt wird. Bei diesem bekannten Zerteilwerkzeug werden ein Stempel und ein Niederhalter gegenüber einer Matrize bewegt, wobei ein Werkstück zwischen den Niederhalter und der Matrize geklemmt und anschließend zerteilt wird. Um den bei der Zerteilung entstehenden Flitter zu entfernen, sind in der Matrize als auch in dem Stempel unter dem Niederhalter Absaugöffnungen vorgesehen, die mit Absaugkanälen in der Matrize, in dem Stempel und dem Niederhalter verbunden sind. Diese Absaugkanäle sind außenseitig mit einer gemeinsamen Abführleitung verbunden. Ein Vakuum im Bereich der Absaugöffnungen wird mittels einer Vakuumpumpe bereitgestellt, die in der Abführleitung installiert ist. Als Nachteil kann bei dieser Absaugvorrichtung für Flitter angesehen werden, dass eine Abdichtung des gesamten Werkzeugs erforderlich ist, um die nötige Saugleistung im Bereich der Schneidkanten des Werkzeugs zu erreichen.In the DE 103 57 923 A1 describes a forming tool as a dividing tool in which flakes are extracted through channels integrated into the tool. In this known dividing tool, a punch and a hold-down device are moved relative to a die, a workpiece being clamped between the hold-down device and the die and then divided. In order to remove the flakes produced during the division, suction openings are provided in the die as well as in the punch below the hold-down device, which are connected to suction channels in the die, in the punch and the hold-down device. These suction channels are connected on the outside to a common discharge line. A vacuum in the area of the suction openings is provided by means of a vacuum pump which is installed in the discharge line. A disadvantage of this suction device for flakes is that the entire tool needs to be sealed in order to achieve the necessary suction power in the area of the cutting edges of the tool.

Aus der DE 10 2009 051 461 B4 ist eine Vorrichtung zum Beschneiden von Formteilen mittels einer Tiefziehpresse für Karosserieteile bekannt, die mit einem Schneidmesser mit einer als Venturidüse ausgebildeten Absaugeinrichtung zum Absaugen von beim Beschneiden entstehenden Werkstoffpartikeln ausgerüstet ist. Diese Venturidüse umfasst einen benachbart zur Schneidkante mündenden Absaugkanal, einen mit Druckluft beaufschlagbaren Zuführkanal und einen Abführkanal für Werkstoffpartikel. Nachteilig ist jedoch, dass aufgrund des begrenzten Bauraums in einem Werkzeugeinsatz eine Venturidüse sich nicht immer integrieren lässt.From the DE 10 2009 051 461 B4 a device for trimming molded parts by means of a deep-drawing press for body parts is known, which is equipped with a cutting knife with a suction device designed as a Venturi nozzle for suctioning off material particles produced during trimming. This Venturi nozzle comprises a suction channel opening adjacent to the cutting edge, a supply channel that can be acted upon by compressed air, and a discharge channel for material particles. However, it is disadvantageous that, due to the limited installation space in a tool insert, a Venturi nozzle cannot always be integrated.

Eine Werkzeugbasis eines Stanzpresswerkzeug umfasst gemäß der JP 2005 014034 A einen Matrizenkörper mit einer in demselben gehaltenen Matrizenspitze. Um die Matrizenspitze sind spaltförmige Öffnungen angeordnet, die in einen unter der Matrizenspitze axial verlaufenden Matrizenkanal des Matrizenkörpers münden. Dieser Matrizenkanal setzt sich als axialer Abführkanal durch die Werkzeugbasis bis zu dessen unteren Ende fort. Um den beim Stanzen und Prägen eines dünnen und plattenartigen Werkstückes entstehenden Flitter über diesen Abführkanal abzuführen, ist im Bereich desselben eine den Coanda-Effekt nutzende Unterdruckpumpe vorgesehen.A tool base of a punch press tool comprises according to FIG JP 2005 014034 A a die body with a die tip held therein. Slit-shaped openings are arranged around the die tip and open into a die channel of the die body running axially below the die tip. This die channel continues as an axial discharge channel through the tool base to its lower end. In order to discharge the flakes produced during the punching and embossing of a thin and plate-like workpiece via this discharge channel, a vacuum pump using the Coanda effect is provided in the area of the same.

Die DE 10 2014 200 198 A1 beschreibt eine Vorrichtung zur spanabhebenden Bearbeitung eines metallischen Bauteils, mit welcher mit der Bearbeitung einer Verschleiß ausgesetzten Oberfläche des metallischen Bauteils der Verschleiß an der Oberfläche ohne das Aufbringen einer Beschichtung gesenkt wird. Hierzu wird ein geschlossenes, unterdrucktaugliches Gehäuse zur Aufnahme eines Teils der zu bearbeitenden Oberfläche des metallischen Bauteils eingesetzt, wobei das unterdrucktaugliche Gehäuse fluidtechnisch mit einem Unterdruckerzeugungsmittel zur Erzeugung einer sauerstoffarmen Umgebung in dem unterdrucktauglichen Gehäuse verbunden ist. Ist das metallische Bauteil aus einem Eisenbasiswerkstoff hergestellt, führt der Unterdruck innerhalb des unterdrucktauglichen Gehäuses zum Absenken des Sauerstoffgehalts und vermindert die Bildung des Eisenoxids Fe2O3. Stattdessen wird das verschleißmindernde Oxid Fe3O4 gebildet.the DE 10 2014 200 198 A1 describes a device for the machining of a metallic component, with which, with the machining of a surface of the metallic component exposed to wear, the wear on the surface is reduced without the application of a coating. For this purpose, a closed, vacuum-compatible housing is used to accommodate part of the surface to be machined of the metallic component, the vacuum-compatible housing being fluidically connected to a vacuum generating means for generating a low-oxygen environment in the vacuum-compatible housing. If the metallic component is made of an iron-based material, the negative pressure inside the housing, which is suitable for negative pressure, leads to a lowering of the oxygen content and reduces the formation of the iron oxide Fe 2 O 3 . Instead, the wear-reducing oxide Fe 3 O 4 is formed.

Weiterhin ist aus der JP H07 256356 A eine Stanzvorrichtung zum Stanzen von großen Blechteilen, wie bspw. einer Karosserieseitenwand bekannt, bei welcher mit dem Ausstanzen der äußeren Kontur eines solchen Blechteils auch der dabei entstehende Abfall mittels einer Schneidevorrichtung mit zwei Scherschneiden zerteilt wird. Im Bereich der unteren Scherschneide der Schneidvorrichtung ist ein kreisrundes Absaugrohr angeordnet.Furthermore, from the JP H07 256356 A a punching device for punching large sheet metal parts, such as a body side wall is known, in which with the punching out of the outer contour of such a sheet metal part, the resulting waste is also divided by means of a cutting device with two shear blades. A circular suction tube is arranged in the area of the lower cutting edge of the cutting device.

Die JP H11 151537 A beschreibt eine Stanzvorrichtung mit einer Absaugvorrichtung im Bereich von unteren Scherschneiden mit einer trompetenartigen Öffnung.the JP H11 151537 A describes a punching device with a suction device in the area of lower cutting edges with a trumpet-like opening.

Des Weiteren beschreibt die EP 0 958 092 B1 eine Fräseinrichtung zum Befräsen des Schweißbereichs von schweißverbundenen Blechteilen, die eine Unterdruckpumpe zum Absaugen von während des Befräsens erzeugten Spänen aufweist. Hierzu werden Unterdruckpumpen vorgeschlagen, die zur Erzeugung eines Unterdrucks den Coanda-Effekt oder den Bernoulli-Effekt verwenden.Furthermore, the EP 0 958 092 B1 a milling device for milling the welding area of welded sheet metal parts, which has a vacuum pump for sucking off chips generated during milling. For this purpose, vacuum pumps are proposed which use the Coanda effect or the Bernoulli effect to generate a negative pressure.

Der Aufbau und die Funktionsweise einer den Coanda-Effekt nutzenden Unterdruckpumpe werden anhand der Figur 1 erläutert. Bei einer solchen Unterdruckpumpe 10 wird mittels eines über einen Strömungskanal 11 eines rohrförmigen Pumpenkörpers 10.1 geführten Luftstroms ein Unterdruck erzeugt. In Strömungsrichtung R beginnt dieser Strömungskanal 11 mit einer Eintrittsöffnung 12 mit einer Eintrittsquerschnittsfläche, die sich in axialer Richtung des Pumpenkörpers 10.1 konisch bis zu einer Querschnittsverengung 13 mit einer minimalen Durchtrittsfläche verjüngt. Unmittelbar vor dieser engsten Stelle des Strömungskanals 11 befindet sich ein ringförmiger Spalt 14, der aus einer unter Überdruck stehenden Ringkammer 15 mit Druckluft 16 gespeist wird. Die aus der Ringkammer 15 durch den ringförmigen Spalt 14 in den Strömungskanal 11 eintretende und durch den Coanda-Effekt an der sich erweiternden Wandung des Strömungskanals 11 entlang strömenden Luft verursacht im Strömungskanal 11 einen Luftstrom, der die in axialer Richtung vor dem Spalt 14 liegende Luft L1 ansaugt und mitreißt. Der Austrittsluftstrom L2 kann allein durch Veränderung des ringförmigen Spaltes 14 und dem Druck der Druckluft 16 reguliert werden. Insbesondere ist es mit einer solchen Unterdruckpumpe 10 möglich, ein großes Saugvermögen bei kleinem Luftverbrauch zu realisieren.The structure and mode of operation of a vacuum pump using the Coanda effect are illustrated using the Figure 1 explained. In such a vacuum pump 10, a vacuum is generated by means of an air flow guided through a flow channel 11 of a tubular pump body 10.1. In the flow direction R, this flow channel 11 begins with an inlet opening 12 with an inlet cross-sectional area which tapers conically in the axial direction of the pump body 10.1 to a cross-sectional constriction 13 with a minimal passage area. Immediately in front of this narrowest point of the flow channel 11 there is an annular gap 14, which is fed with compressed air 16 from an annular chamber 15 which is under overpressure. The air entering the flow channel 11 from the annular chamber 15 through the annular gap 14 and flowing along the widening wall of the flow channel 11 due to the Coanda effect causes an air flow in the flow channel 11 that breaks the air lying in front of the gap 14 in the axial direction L1 sucks in and carries away. The outlet air flow L2 can be regulated solely by changing the annular gap 14 and the pressure of the compressed air 16. In particular, with such a vacuum pump 10 it is possible to achieve a high pumping speed with low air consumption.

Es ist Aufgabe der Erfindung ein verbessertes Formgebungswerkzeug zum Trennen von Metall- oder Nichtmetallwerkstoffen anzugeben, mit welchem in konstruktiv einfacher Weise die beim Trennen der Metall- oder Nichtmetallwerkstoffen entstehenden Partikel, insbesondere Flitter abgesaugt werden können.It is the object of the invention to provide an improved shaping tool for cutting metal or non-metal materials, with which the particles, in particular flakes, that arise when the metal or non-metal materials are cut can be suctioned off in a structurally simple manner.

Diese Aufgabe wird gelöst durch ein Formgebungswerkzeug zum Trennen von Metall- oder Nichtmetallwerkstoffen mit den Merkmalen des Patentanspruchs 1 und mit den Merkmalen des Patentanspruchs 5.This object is achieved by a shaping tool for separating metal or non-metal materials with the features of claim 1 and with the features of claim 5.

Erfindungsgemäß wird nach der erstgenannten Lösung ein Formgebungswerkzeug zum Trennen von Metall- und Nichtmetallwerkstoffen geschaffen, mit

  • wenigstens einem Grundkörper, an welchem wenigstens ein Werkzeugeinsatz mit einer Eingriffskontur angeordnet ist, wobei zum Scherschneiden der Werkzeugeinsatz ein Schneidmesser mit einer Schneidkante als Eingriffskontur ist, und
  • einer im Bereich der Eingriffskontur zur Absaugung von Flitter extern von dem Werkzeugeinsatz angeordnete und eine Düsenöffnung aufweisende Absaugdüse, die mit einer den Coanda-Effekt nutzenden Unterdruckpumpe verbunden ist, wobei
    • die Absaugdüse eine spaltförmige Düsenöffnung mit einem rechteckigen, ovalen oder elliptischen Öffnungsquerschnitts aufweist und sich im Bereich der als Schneidkante ausgebildeten Eingriffskontur erstreckt, und
    • die Absaugdüse (4) in Richtung der Eingriffskontur (3.1) konisch verbreiternd ausgebildet ist.
According to the invention, according to the first-mentioned solution, a shaping tool for separating metal and non-metal materials is created with
  • at least one base body on which at least one tool insert with an engagement contour is arranged, the tool insert being a cutting knife with a cutting edge as an engagement contour for shear cutting, and
  • a suction nozzle which is arranged in the area of the engagement contour for suctioning off flakes externally from the tool insert and has a nozzle opening and is connected to a vacuum pump using the Coanda effect, wherein
    • the suction nozzle has a slot-shaped nozzle opening with a rectangular, oval or elliptical opening cross-section and extends in the area of the engagement contour designed as a cutting edge, and
    • the suction nozzle (4) is designed to widen conically in the direction of the engagement contour (3.1).

Bei einem solchen erfindungsgemäßen Formgebungswerkzeug ist für die Absaugung von Flitter nur ein konstruktiv geringer Aufwand erforderlich, da die realisierte Absaugeinrichtung lediglich aus einer im Bereich der Eingriffskontur angeordneten Absaugdüse und einer den Coanda-Effekt nutzenden Unterdruckpumpe aufgebaut ist, wobei diese Baugruppen über Rohrleitungen oder Schläuche miteinander verbunden sind.In the case of such a shaping tool according to the invention, only a low structural effort is required for the suction of tinsel, since the suction device implemented only consists of one in the area of the engagement contour arranged suction nozzle and a vacuum pump using the Coanda effect, these assemblies being connected to one another via pipes or hoses.

Besonders vorteilhaft ist es, wenn weiterbildungsgemäß das Formgebungswerkzeug einen mit der Unterdruckpumpe verbundenen Auffangbehälter zur Aufnahme des abgesaugten Flitters aufweist. Damit wird verhindert, dass der Flitter aus den mit der Unterdruckpumpe verbundenen Rohrleitungen oder den Schläuchen unkontrolliert ausgeblasen wird. Ansonsten könnte der Flitter auch über ein offenes Ende der/des mit der Unterdruckpumpe verbundenen Rohrleitung oder Schlauchs in einen Abfallschacht geleitet werden.It is particularly advantageous if, according to a further development, the shaping tool has a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.

Nach einer vorteilhaften Weiterbildung der Erfindung nach der erstgenannten Lösung ist die Absaugdüse bezüglich einer Schneidfläche des Schneidmessers gegenüberliegend zur Schneidkante derart an dem Schneidmesser angeordnet ist, dass die Düsenöffnung in Normalenrichtung einer Aktivfläche der Eingriffskontur, d.h. einer Schneidfläche der Schneidkante gegenüber der Ebene dieser Aktivfläche bzw. Schneidfläche einen Überstand aufweist. Damit kann der Flitter in Schneidrichtung unmittelbar in die Düsenöffnung abgesaugt werden, bevor er sich in dem Formgebungswerkzeug verbreiten kann.According to an advantageous development of the invention according to the first-mentioned solution, the suction nozzle is arranged on the cutting knife with respect to a cutting surface of the cutting knife opposite the cutting edge in such a way that the nozzle opening is in the normal direction of an active surface of the engagement contour, ie a cutting surface of the cutting edge opposite the plane of this active surface or Cutting surface has a protrusion. In this way, the tinsel can be sucked off directly into the nozzle opening in the cutting direction before it can spread in the shaping tool.

Alternativ ist weiterbildungsgemäß die Absaugdüse an dem Schneidmesser derart angeordnet, dass die Düsenöffnung gegenüber einer Ebene einer Aktivfläche der Eingriffskontur, d.h. einer Schneidfläche der Schneidkante In Bezug auf den Werkzeugeinsatz bzw. dem Schneidmesser nach innen versetzt ist. Damit wird das von dem Werkstück abgetrennte Teil durch die Absaugdüse beim Herabfallen nicht behindert.Alternatively, according to a further development, the suction nozzle is arranged on the cutting knife in such a way that the nozzle opening is offset inwardly in relation to a plane of an active surface of the engagement contour, i.e. a cutting surface of the cutting edge with respect to the tool insert or the cutting knife. In this way, the part separated from the workpiece is not hindered by the suction nozzle when it falls down.

Erfindungsgemäß wird nach der zweitgenannten Lösung ein Formgebungswerkzeug zum Trennen von Metall- oder Nichtmetallwerkstoffen geschaffen, mit

  • wenigstens einem Grundkörper, an welchem wenigstens ein Werkzeugeinsatz mit einer Eingriffskontur angeordnet ist, wobei zum Scherschneiden der Werkzeugeinsatz ein Schneidmesser mit einer Schneidkante als Eingriffskontur ist,
  • einem in dem Werkzeugeinsatz verlaufenden Absaugkanal, welcher eine im Bereich der Eingriffskontur angeordnete Absaugöffnung zum Absaugen von Flitter mit einer Abführöffnung verbindet, wobei die Absaugöffnung als Spaltdüse mit einem schmalen Schlitz ausgeführt ist, welcher sich parallel zur Richtung der Eingriffskontur erstreckt, und
  • einer den Coanda-Effekt nutzenden Unterdruckpumpe, die mit der Abführöffnung verbunden ist.
According to the invention, according to the second solution mentioned, a shaping tool for separating metal or non-metal materials is created with
  • at least one base body on which at least one tool insert with an engagement contour is arranged, the tool insert being a cutting knife with a cutting edge as the engagement contour for shear cutting,
  • a suction channel running in the tool insert, which connects a suction opening arranged in the area of the engagement contour for sucking up tinsel with a discharge opening, the suction opening being designed as a slit nozzle with a narrow slot which extends parallel to the direction of the engagement contour, and
  • a vacuum pump using the Coanda effect, which is connected to the discharge opening.

Bei dieser erfindungsgemäßen zweitgenannten Lösung ist die Absaugdüse der Absaugeinrichtung für Flitter in den Werkzeugeinsatz und den Grundkörper als Absaugkanal realisiert, dessen Absaugöffnung im Bereich der Eingriffskontur angeordnet ist und dessen Abführöffnung, die über eine Rohrleitung oder einen Schlauch mit der Unterdruckpumpe verbunden ist, im Bereich des Grundkörpers ist. Auch bei diesem erfindungsgemäßen Formgebungswerkzeug wird bei der Unterdruckpumpe der Coanda-Effekt genutzt.In this second-mentioned solution according to the invention, the suction nozzle of the suction device for flakes is implemented in the tool insert and the base body as a suction channel, the suction opening of which is arranged in the area of the engagement contour and the evacuation opening, which is connected to the vacuum pump via a pipe or a hose, in the area of the Base body is. In this shaping tool according to the invention, too, the Coanda effect is used in the vacuum pump.

Besonders vorteilhaft ist es, wenn bei dieser zweitgenannten Lösung weiterbildungsgemäß das Formgebungswerkzeugs mit einem mit der Unterdruckpumpe verbundenen Auffangbehälter zur Aufnahme des abgesaugten Flitters ausgebildet ist. Damit wird verhindert, dass der Flitter aus den mit der Unterdruckpumpe verbundenen Rohrleitungen oder den Schläuchen unkontrolliert ausgeblasen wird. Ansonsten könnte der Flitter auch über ein offenes Ende der/des mit der Unterdruckpumpe verbundenen Rohrleitung oder Schlauchs in einen Abfallschacht geleitet werden.It is particularly advantageous if, in this second-mentioned solution, according to a further development, the shaping tool is designed with a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren ausführlich beschrieben. Es zeigen:

Figur 1
eine schematische Darstellung einer den Coanda-Effekt nutzenden Unterdruckpumpe,
Figur 2
eine schematische Schnittdarstellung eines Werkzeugeinsatzes mit einer Eingriffskontur und einer Absaugdüse zum Absaugen von Flitter als erfindungsgemäßes Ausführungsbeispiel,
Figur 3
eine schematische Schnittdarstellung eines Werkzeugeinsatzes mit einer Eingriffskontur und einer Absaugdüse zum Absaugen von Flitter als weiteres erfindungsgemäßes Ausführungsbeispiel,
Figur 4
eine Prinzipdarstellung einer Absaugeinrichtung eines Formgebungswerkzeugs gemäß der Erfindung,
Figur 5
eine perspektivische Teildarstellung eines Werkzeugeinsatzes mit einer Eingriffskontur und einer in dem Werkzeugeinsatz integrierten Absaugöffnung zum Absaugen von Flitter als weiteres erfindungsgemäßes Ausführungsbeispiel, und
Figur 6
eine perspektivische Darstellung eines mit der Absaugöffnung verbundenen Absaugkanals des Werkzeugeinsatzes nach Figur 5.
The invention is described in detail below on the basis of exemplary embodiments with reference to the accompanying figures. Show it:
Figure 1
a schematic representation of a vacuum pump using the Coanda effect,
Figure 2
a schematic sectional view of a tool insert with an engagement contour and a suction nozzle for suctioning off tinsel as an exemplary embodiment according to the invention,
Figure 3
a schematic sectional view of a tool insert with an engagement contour and a suction nozzle for suctioning off tinsel as a further exemplary embodiment according to the invention,
Figure 4
a schematic diagram of a suction device of a shaping tool according to the invention,
Figure 5
a perspective partial representation of a tool insert with an engagement contour and a suction opening integrated in the tool insert for sucking up tinsel as a further exemplary embodiment according to the invention, and
Figure 6
a perspective view of a suction channel connected to the suction opening of the tool insert according to FIG Figure 5 .

Die in Figur 1 dargestellte den Coanda-Effekt verwendende Unterdruckpumpe wurde zur Erläuterung des Funktionsprinzips bereits in der Beschreibungseinleitung beschrieben. Daher wird nachfolgend gegebenenfalls lediglich hierauf referenziert.In the Figure 1 The vacuum pump shown using the Coanda effect has already been described in the introduction to the description to explain the functional principle. Therefore, reference is only made to this in the following.

Die Figuren 2 und 3 zeigen von einem Formgebungswerkzeugs 1 zum Scherschneiden ein Schneidmesser als Werkzeugeinsatz 3 mit einer Schneidkante als Eingriffskontur 3.1, wobei dieser Werkzeugeinsatz 3 auf einem schematisch angedeuteten Grundkörper 2 als Werkzeugunterteil des Formgebungswerkzeugs 1 angeordnet ist.the Figures 2 and 3 show of a shaping tool 1 for shearing a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1, this tool insert 3 being arranged on a schematically indicated base body 2 as the lower tool part of the shaping tool 1.

Um den beim Scherschneiden entstehenden Flitter abzusaugen und abzuführen ist gemäß den Figuren 2 und 3 im Bereich der Eingriffskontur 3.1 eine Absaugdüse 4 angeordnet. Diese Absaugdüse 4 weist eine spaltförmige Düsenöffnung 4.1 mit einem rechteckigen, ovalen oder elliptischen Öffnungsquerschnitt auf und erstreckt sich in Richtung der Eingriffskontur 3.1, also der Schneidkante, bspw. parallel zur Richtung der Eingriffskontur 3.1. Die als Spaltdüse ausgebildete Absaugdüse 4 ist in Richtung der Eingriffskontur 3.1, also in Richtung der Schneidkante konisch verbreiternd ausgebildet.In order to suck off and discharge the flakes produced during shear cutting, according to the Figures 2 and 3 in the area of the engagement contour 3.1 a Suction nozzle 4 arranged. This suction nozzle 4 has a slot-shaped nozzle opening 4.1 with a rectangular, oval or elliptical opening cross section and extends in the direction of the engagement contour 3.1, that is to say the cutting edge, for example parallel to the direction of the engagement contour 3.1. The suction nozzle 4 designed as a slot nozzle is designed to widen conically in the direction of the engagement contour 3.1, that is to say in the direction of the cutting edge.

An dieser Absaugdüse 4 ist ein Schlauch 5 angeschlossen, der mit einer den Coanda-Effekt nutzenden Unterdruckpumpe 10 verbunden ist. Diese Komponenten, also die Absaugdüse 4, der Schlauch 5 sowie die Unterdruckpumpe 10 bilden einen Teil einer Absaugeinrichtung zum Absaugen von Flitter, wie nachfolgend anhand der Figur 4 erläutert wird.A hose 5, which is connected to a vacuum pump 10 using the Coanda effect, is connected to this suction nozzle 4. These components, that is to say the suction nozzle 4, the hose 5 and the vacuum pump 10, form part of a suction device for suctioning off flakes, as shown below with reference to FIG Figure 4 is explained.

Eine solche zum Absaugen von Flitter vorgesehene Absaugeinrichtung eines Formgebungswerkzeugs 1 mit einem Werkzeugeinsatz 3 gemäß den Figuren 2 und 3 umfasst gemäß Figur 4 als zentrale Einheit die den Coanda-Effekt verwendende Unterdruckpumpe 10 mit einem entsprechend von Figur 1 dargestellten prinzipiellen Aufbau. Diese Unterdruckpumpe 10 weist einen Druckluftanschluss 17 zur Zuführung von Druckluft 16 in die Ringkammer 15 auf. Diese Unterdruckpumpe 10 ist mit der im Bereich der Eingriffskontur 3.1 des Werkzeugeinsatzes 3 des Formgebungswerkzeugs angeordneten Absaugdüse 4 über den Schlauch 5 verbunden, so dass der im Bereich der Eingriffskontur 3.1 entstehende Flitter F abgesaugt wird. Die diesen Flitter F enthaltende Abluft wird über eine Rohrleitung oder einen Schlauch 6 in einen Auffangbehälter 7 geleitet, in welcher der Flitter F gesammelt wird.Such a suction device of a shaping tool 1 with a tool insert 3 according to FIGS Figures 2 and 3 includes according to Figure 4 as a central unit, the vacuum pump 10 using the Coanda effect with a correspondingly from Figure 1 basic structure shown. This vacuum pump 10 has a compressed air connection 17 for supplying compressed air 16 into the annular chamber 15. This vacuum pump 10 is connected to the suction nozzle 4 arranged in the area of the engagement contour 3.1 of the tool insert 3 of the shaping tool via the hose 5, so that the flakes F produced in the area of the engagement contour 3.1 are sucked off. The exhaust air containing this flake F is passed via a pipe or a hose 6 into a collecting container 7 in which the flake F is collected.

Die Unterdruckpumpe 10 ist also zwischen dem Bereich der Schneidkante als Eingriffskontur 3.1 und dem Auffangbehälter 7 in das Formgebungswerkzeug 1 integriert, wobei durch die Position der Unterdruckpumpe 10 die Saugleistung, bspw. durch die Länge der verwendeten Schläuche 5 und 6 eingestellt werden kann.The vacuum pump 10 is thus integrated into the shaping tool 1 between the area of the cutting edge as engagement contour 3.1 and the collecting container 7, whereby the suction power, for example the length of the hoses 5 and 6 used, can be adjusted through the position of the vacuum pump 10.

Die Anordnung der Absaugdüse 4 an dem als Schneidmesser ausgebildeten Werkzeugeinsatz 3 kann gemäß den Figuren 2 und 3 in unterschiedlicher Weise erfolgen.The arrangement of the suction nozzle 4 on the tool insert 3, which is designed as a cutting knife, can according to FIGS Figures 2 and 3 done in different ways.

Die Schneidkante als Eingriffskontur 3.1 geht in eine Aktivfläche 3.2 über, die die Schneidfläche der Schneidkante darstellt und in den Figuren 2 und 3 als Ebene E bezeichnet ist.The cutting edge as engagement contour 3.1 merges into an active surface 3.2, which represents the cutting surface of the cutting edge and into the Figures 2 and 3 is designated as level E.

Gemäß Figur 2 ist die gegenüberliegend zur Eingriffskontur 3.1 im Bereich der Aktivfläche 3.2 angeordnete Absaugdüse 4 derart gegenüber der Ebene E in Richtung des Werkzeugeinsatzes 3 nach innen versetzt, dass die Ebene E die Düsenöffnung 4.1 nicht schneidet. Damit wird ein von einem Werkstück mittels der Schneidkante als Eingriffskontur 3.1 abgetrennte Teil durch die Absaugdüse 4 beim Herabfallen nicht behindert, da die Absaugdüse 4 an dieser Aktivfläche 3.2 nicht übersteht.According to Figure 2 the suction nozzle 4 arranged opposite the engagement contour 3.1 in the area of the active surface 3.2 is offset inwardly in relation to the plane E in the direction of the tool insert 3 such that the plane E does not intersect the nozzle opening 4.1. In this way, a part separated from a workpiece by means of the cutting edge as engagement contour 3.1 is not hindered by the suction nozzle 4 when it falls down, since the suction nozzle 4 does not protrude from this active surface 3.2.

Im Gegensatz hierzu ist gemäß Figur 3 die Absaugdüse 4 an dem Werkzeugeinsatz 3 derart angeordnet, dass ein Überstand a erzeugt wird. Die Düsenöffnung 4.1 ist in Normalenrichtung der Aktivfläche 3.2 der Eingriffskontur 3.1 gegenüber der Ebene E in Bezug auf den Werkzeugeinsatz 3 nach außen versetzt. Damit kann der Flitter F in Schneidrichtung unmittelbar in die Düsenöffnung 4.1 abgesaugt werden, bevor er sich in dem Formgebungswerkzeug 1 verbreiten kann.In contrast, according to Figure 3 the suction nozzle 4 is arranged on the tool insert 3 in such a way that an overhang a is produced. The nozzle opening 4.1 is offset to the outside in the normal direction of the active surface 3.2 of the engagement contour 3.1 with respect to the plane E in relation to the tool insert 3. The tinsel F can thus be sucked off directly into the nozzle opening 4.1 in the cutting direction before it can spread in the shaping tool 1.

Die Figur 5 zeigt ein Schneidmesser als Werkzeugeinsatz 3 mit einer Schneidkante als Eingriffskontur 3.1. Dieser Werkzeugeinsatz 3 ist auf einem Grundkörper 2 eines Formgebungswerkzeugs 1 angeordnet, wobei der Grundkörper ein Werkzeugunterteil dieses Formgebungswerkzeugs 1 bildet.the Figure 5 shows a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1. This tool insert 3 is arranged on a base body 2 of a shaping tool 1, the base body forming a lower tool part of this shaping tool 1.

Bei diesem Werkzeugeinsatz 3 wird der bei der Bearbeitung eines Werkstücks anfallende Flitter nicht von einer entsprechenden Figuren 2 und 3 extern angeordneten Absaugdüse abgesaugt, sondern über einen in dem Werkzeugeinsatz 3 verlaufenden Absaugkanal 8, der eine im Bereich der Eingriffskontur 3.1 angeordnete Absaugöffnung 8.1 mit einer im unteren Bereich des Werkzeugeinsatzes 3 angeordnete Abführöffnung 8.2 verbindet.In the case of this tool insert 3, the tinsel that arises when machining a workpiece is not removed from a corresponding one Figures 2 and 3 externally arranged suction nozzle, but via one in the Tool insert 3 extending suction channel 8, which connects a suction opening 8.1 arranged in the region of the engagement contour 3.1 with a discharge opening 8.2 arranged in the lower region of the tool insert 3.

In Figur 6 ist dieser Absaugkanal 8 mit der Absaugöffnung 8.1 und der Abführöffnung 8.2 als separates Element dargestellt. Hieraus ist erkennbar, dass der Absaugkanal 8 beginnend mit der Abführöffnung 8.2 zunächst einen kreisförmigen Querschnitt aufweist, der anschließend in einen rechteckförmigen Querschnitt übergeht, der dann in dem schlitzförmigen Querschnitt der Absaugöffnung 8.1 endet. Es können auch mehrere Absaugöffnungen 8.1 in dem Werkzeugeinsatz 3.1 realisiert werden, indem bspw. von dem Abschnitt des Absaugkanals 8 mit kreisförmigem Querschnitt mehrere Abschnitte mit rechteckförmigen Querschnitten abzweigen, die jeweils in einer Absaugöffnung enden. Die einzelnen Querschnitte können dabei jede beliebige Geometrie aufweisen.In Figure 6 this suction channel 8 with the suction opening 8.1 and the discharge opening 8.2 is shown as a separate element. It can be seen from this that the suction channel 8, beginning with the discharge opening 8.2, initially has a circular cross section, which then merges into a rectangular cross section, which then ends in the slit-shaped cross section of the suction opening 8.1. Several suction openings 8.1 can also be implemented in the tool insert 3.1 by, for example, branching off several sections with rectangular cross-sections from the section of the suction channel 8 with a circular cross-section, each of which ends in a suction opening. The individual cross-sections can have any geometry.

Die Absaugöffnung 8.1 ist gemäß den Figuren 5 und 6 als Spaltdüse mit einem schmalen Schlitz ausgeführt und erstreckt sich in Richtung der als Schneidkante ausgeführten Eingriffskontur 3.1, bspw. parallel zur Richtung der Eingriffskontur 3.1.The suction opening 8.1 is according to the Figures 5 and 6 designed as a slit nozzle with a narrow slot and extends in the direction of the engagement contour 3.1 designed as a cutting edge, for example parallel to the direction of the engagement contour 3.1.

An die Abführöffnung 8.2 des Absaugkanals 8 des Werkzeugeinsatzes 3 wird ein Anschlussstutzen angeflanscht, der über einen Schlauch 5 mit einer Unterdruckpumpe 10 verbunden ist. Somit stellt dieser Absaugkanal 8 eine Komponente der in Figur 4 dargestellten Absaugeinrichtung des Formgebungswerkzeugs 1 dar.A connecting piece is flanged to the discharge opening 8.2 of the suction channel 8 of the tool insert 3 and is connected to a vacuum pump 10 via a hose 5. This suction channel 8 thus constitutes a component of the in Figure 4 illustrated suction device of the forming tool 1.

Bezugsz ich nRef

11
FormgebungswerkzeugsShaping tool
22
GrundkörperBase body
33
WerkzeugeinsatzTool use
3.13.1
EingriffskonturEngagement contour
3.23.2
Aktivfläche der EingriffskonturActive surface of the engagement contour
44th
AbsaugdüseSuction nozzle
4.14.1
Düsenöffnung der Absaugdüse 4Nozzle opening of the suction nozzle 4
55
Schlauchhose
66th
Schlauchhose
77th
AuffangbehälterCollecting container
88th
AbsaugkanalSuction duct
8.18.1
AbsaugöffnungSuction opening
8.28.2
AbführöffnungDischarge opening
1010
UnterdruckpumpeVacuum pump
10:110: 1
PumpenkörperPump body
1111
StrömungskanalFlow channel
1212th
EintrittsöffnungInlet opening
1313th
QuerschnittsverengungCross-sectional constriction
1414th
ringförmiger Spaltannular gap
1515th
RingkammerAnnular chamber
1616
DruckluftCompressed air
aa
ÜberstandGot over
EE.
Ebenelevel
FF.
Flitterbauble
L1L1
Luftair
L2L2
AusgangsluftstromExit airflow
RR.
StrömungsrichtungDirection of flow

Claims (6)

  1. Moulding device (1) for cutting of metal or non-metal materials comprising
    - at least one main body (2), on which at least one tool insert (3) with an engagement contour (3.1) is arranged, wherein for shear-cutting the tool insert (3) is a cutting blade with a cutting edge as engagement contour (3.1), and
    - one for sucking away swarf (F) arranged in the region of the engagement contour (3.1) and externally of the tool insert (3) and having a nozzle opening (4.1), which suction nozzle (4) is connected by means of a hose (5) to a vacuum pump (10) utilising the Coanda effect, wherein
    - the suction nozzle (4) has a gap-shaped nozzle opening (4.1) with a rectangular, oval, or elliptical opening cross-section and extends in the region of the engagement contour (3.1) configured as a cutting edge, and
    - the suction nozzle (4) is configured to widen conically in the direction of the engagement contour (3.1).
  2. Moulding device (1) according to claim 1 comprising a collecting container (7) connected to the vacuum pump (10) for receiving the swarf (F) that is sucked away.
  3. Moulding device (1) according to claim 1 or 2, in which the suction nozzle (4) is arranged on the tool insert (3) in such a way that the nozzle opening (4.1) has a projection in the normal direction of an active surface (3.2) of the engagement contour (3.1) with respect to the plane (E) of this active surface (3.2).
  4. Moulding device (1) according to claim 1 or 2, in which the suction nozzle (4) is arranged on the tool insert (3) in such a way that the nozzle opening (4) is inwardly offset with respect to a plane (E) of an active surface (3.2) of the engagement contour (3.1) in relation to the tool insert (3).
  5. Moulding device (1) for cutting of metal or non-metal materials comprising
    - at least one main body (2), on which at least one tool insert (3) is arranged with an engagement contour (3.1) is arranged, wherein for shear-cutting the tool insert (3) is a cutting blade with a cutting edge as engagement contour (3.1),
    - a suction channel (8) running in the tool insert (3), which connects a suction opening (8.1) arranged in the region of the engagement contour (3.1) for sucking away swarf (F) to a discharge opening (8.2), wherein the suction opening (8.1) is constructed as a gap nozzle with a narrow slit that extends parallel to the direction of the engagement contour (3.1), and
    - a vacuum pump (10) utilising the Coanda effect, which is connected to the discharge opening (8.2).
  6. Moulding device (1) according to claim 5 comprising a collecting container (7) connected to the vacuum pump (10) for collecting the swarf (F) that is sucked away.
EP17000578.9A 2016-04-23 2017-04-06 Moulding device for cutting of materials Active EP3235593B1 (en)

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DE102021126070A1 (en) * 2021-10-07 2023-04-13 Multivac Sepp Haggenmüller Se & Co. Kg SUCTION NOZZLE

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DE102016004961A1 (en) 2017-10-26

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