WO2011083102A2 - Device for partially severing a workpiece - Google Patents

Device for partially severing a workpiece Download PDF

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Publication number
WO2011083102A2
WO2011083102A2 PCT/EP2011/050020 EP2011050020W WO2011083102A2 WO 2011083102 A2 WO2011083102 A2 WO 2011083102A2 EP 2011050020 W EP2011050020 W EP 2011050020W WO 2011083102 A2 WO2011083102 A2 WO 2011083102A2
Authority
WO
WIPO (PCT)
Prior art keywords
drive
support
workpiece
detection element
distance
Prior art date
Application number
PCT/EP2011/050020
Other languages
German (de)
French (fr)
Other versions
WO2011083102A3 (en
Inventor
Krzysztof Pekal
Andreas Wieners
Original Assignee
Frimo Group Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frimo Group Gmbh filed Critical Frimo Group Gmbh
Publication of WO2011083102A2 publication Critical patent/WO2011083102A2/en
Publication of WO2011083102A3 publication Critical patent/WO2011083102A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/0006—Means for guiding the cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J11/00—Manipulators not otherwise provided for
    • B25J11/005—Manipulators for mechanical processing tasks
    • B25J11/0055—Cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/157—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
    • B26D1/16—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B26D3/085—On sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B26D5/06—Means for moving the cutting member into its operative position for cutting by electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B26D7/34—Means for performing other operations combined with cutting for applying a coating, such as butter, to cut product

Definitions

  • the invention relates to a device for partially severing a workpiece, which preferably at least partially made of leather, plastic or the like.
  • the device in this case comprises a support for the workpiece, guided by a guide means cutting device which is arranged by means of a holder on a tool holder of the guide means, and arranged on the tool holder detection element, which is designed to detect a distance between the detection element and the support ,
  • Such devices are preferably used to make airbag flaps that open in a controlled manner upon deployment of an airbag and temporarily inflate a gas-filled airbag in the space between a passenger of an injured vehicle and a vehicle wall.
  • Such a device is known from DE 203 14 281 Ul.
  • This device has the disadvantage that, although by means of the distance sensor, the distance to the workpiece can be detected exactly, but the time until the distance to the workpiece is adjusted again and set at a deviation sometimes takes a long time, which leads to a deterioration of the quality of cut.
  • the invention has for its object to provide an apparatus for partially severing a workpiece, which solves the known problems of the prior art and which is adapted to quickly respond to changes in distance between the workpiece and cutter and thus to improve the quality of cut.
  • the invention is based on the idea of optimizing the cutting device in such a way that it is able to respond particularly quickly to changes in distance between the cutting device and the workpiece.
  • the inventive device for partially severing a workpiece which preferably at least partially made of leather, plastic or the like, comprises for this purpose a support for the workpiece, guided by a guide means cutting device which is arranged by means of a holder on a tool holder of the guide means, as well as a arranged on the tool holder detection element, which is designed to detect a distance between the detection element and the support.
  • the holder is in addition to a
  • Tool holder arranged drive in relation to the tool holder substantially perpendicular to the surface of the support displaced. Characterized in that an additional arranged on the tool holder drive is provided, it is possible to decouple the holder and thus the cutting device of the tool holder, so that when moving the holder by the drive, the inertia of the moving parts (ie the cutting device) significantly reduced is, so that a changed distance between support and cutting device, which is detected by the detection element, can be reacted immediately and substantially instantaneously. In this way, it is possible to always maintain a residual workpiece thickness when partially severing the workpiece, so that the machining quality is improved.
  • the distance of the cutting device to the support during cutting by the guide device drive and / or the drive is adjustable. In this way, it is advantageously possible to use the guide device drive for large adjustment movements to use the drive according to requirements for immediate compensation of small adjustment movements, so that the required residual workpiece thickness of the workpiece can be maintained with advantage exactly.
  • the drive is a linear drive which comprises a servomotor.
  • the servomotor can advantageously comprise a spindle drive.
  • the drive of the device comprises a piezo drive.
  • Piezo drives have the advantage that they can drive the drive into the desired position particularly quickly and without generating a magnetic field.
  • the guide device of the device may have at least two mutually movable, interconnected axes. In this way, it is possible to substantially increase the mobility of the guide device in space, so that the guide device can advantageously approach very different positions and the cutting device can act there.
  • the detection element is designed to detect the distance to the support inductively. In this way it is possible to detect the distance to the support without the workpiece influencing the distance detection. It is therefore possible, the distance between the sensing element and support sen, while a workpiece between detection element and support is arranged.
  • the detection element is rigidly arranged on the tool holder. In this way, it is possible to detect the distance between the recording and detection element and thus the distance between recording and cutting device by the immovably arranged detection element very accurately.
  • the guide device is a robot, in particular an articulated-arm robot. In this way, the flexibility and the economy of the device are advantageously increased.
  • the cutting device is provided with a fixed blade and is optionally adapted to introduce a release agent in a cut performed.
  • a fixed blade it is possible to introduce even cuts into a workpiece.
  • the cutting device is additionally formed in an alternative embodiment is to introduce a release agent in a cut performed, so it is advantageously possible, before any subsequent backfoaming of the workpiece to prepare the cut performed so that no foaming material or the like penetrates into the cut.
  • Sonotrodes schneid Road and / or be designed as a rotary blade having a cutting device.
  • FIG. 1 shows a guide device with a device according to the invention for partially severing a workpiece
  • Fig. 2 shows a section of an inventive
  • Fig. 3 shows a block diagram of which the
  • FIG. 1 shows a device 10 according to the invention arranged on a guide device 20.
  • the guide device 20 which is shown in the embodiment shown as (articulated arm) robot 20, can be moved in space such that the cutting device 14 directly over one on a support 12 (not shown) placed workpiece 11 can be arranged.
  • the device 10 in this case has a tool holder 22, reference being made in particular to FIG. 2.
  • a drive 24 is provided, on which a holder 16 is mounted.
  • the stationary part of the drive 24 is fixed to the tool holder 22 and the moving part of the drive 24 to the holder 16.
  • a cutting device 14 is arranged on the holder 16, a cutting device 14 is arranged.
  • the holder 16 is moved by means of the drive 24 so that when the cutting device 14 is arranged approximately in the cutting position above the workpiece 11, this can be moved approximately perpendicular to the surface of the support 12
  • a detection element 26 is further arranged, which is adapted to detect the distance between the receptacle 12 and detection element 26.
  • the detection element 26 is arranged in the embodiment shown in the vicinity of the cutting device 14.
  • the distance between support 12 and detection element 26 is detected continuously. Characterized in that the position of the cutting device 14 is known due to the known degree of extension of the drive 24 with respect to the tool holder 22, it is possible to determine the distance between the cutting device 14 and support 12 from the distance between the detection element 26 and support 12. In this way, during the cutting with the cutting device 14, the residual workpiece thickness of the workpiece 11 can be determined continuously.
  • the detection element 26 detects this and causes independently or via a suitable control device that the drive 24 this change in distance corrected immediately. Since the drive 24 in the embodiment shown moves only the cutting device 14 and the holder 16, the inertia of the moving masses is very low, which makes it possible to react directly to changes in distance between the detection element 26 and the support 12. This has the advantage that the guide device 20 does not have to constantly readjust, but that it is sufficient to move only the holder 16 and thus the cutting device 14. In this way, very accurate machining results are achieved.
  • Fig. 3 shows a block diagram for driving a device according to the invention. There is one
  • Guiding device 20 which specifies a machining curve for the cutting device 14. This curve is implemented, for example, with a so-called fieldbus.
  • the reaction 26 monitors the detection element of the distance z is between sensing element 26 and bearing 12. In one deviation of z is formed from the nominal value a regulating deviation, which is detected by the detection element 26 and is compensated for by the drive 24 by the drive 24 the holder 16 in the direction of the support 12 and thus of the workpiece 11 moves. If the setpoint deviation is reversed, this process is reversed. In this way, small fluctuations of the desired distance z is can be compensated substantially directly, so that a uniform residual workpiece thickness can be achieved when cutting with the cutting device 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Robotics (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The invention relates to a device (10) for partially severing a workpiece (11), which preferably consists of leather, synthetic material or the like, at least in some sections, wherein the device comprises a support (12) for the workpiece (11), a cutting unit (14) that is guided by a guide unit (20) and arranged on a tool holder of the guide unit (20) by means of a mounting (16), and a detection element (26), which is arranged on the tool holder (22) and designed to detect a distance between the detection element (26) and the support (12).

Description

Vorrichtung zum teilweisen Durchtrennen, eines Werkstücks  Device for partially severing a workpiece
Technisches Gebiet Technical area
Die Erfindung betrifft eine Vorrichtung zum teilweisen Durchtrennen eines Werkstücks, welches bevorzugt zumindest abschnittsweise aus Leder, Kunststoff oder dergleichen besteht. Die Vorrichtung umfasst dabei eine Auflage für das Werkstück, eine von einer Führungseinrichtung geführte Schneideinrichtung, die mittels einer Halterung an einer Werkzeugaufnahme der Führungseinrichtung angeordnet ist, sowie ein an der Werkzeugaufnahme angeordnetes Erfassungselement, das zur Erfassung eines Abstandes zwischen dem Erfassungselement und der Auflage ausgebildet ist. Derartige Vorrichtungen gelangen vorzugsweise zur Anwendung um Airbag-Klappen herzustellen, die sich bei einer Auslösung eines Airbags auf kontrollierte Weise öffnen und einen gasgefüllten Luftsack temporär in dem Zwischenraum zwischen einem Passagier eines verunfallten Fahrzeuges und einer Fahrzeugwandung aufblähen. The invention relates to a device for partially severing a workpiece, which preferably at least partially made of leather, plastic or the like. The device in this case comprises a support for the workpiece, guided by a guide means cutting device which is arranged by means of a holder on a tool holder of the guide means, and arranged on the tool holder detection element, which is designed to detect a distance between the detection element and the support , Such devices are preferably used to make airbag flaps that open in a controlled manner upon deployment of an airbag and temporarily inflate a gas-filled airbag in the space between a passenger of an injured vehicle and a vehicle wall.
Stand der Technik State of the art
Eine solche Vorrichtung ist aus der DE 203 14 281 Ul bekannt. Diese Vorrichtung weist den Nachteil auf, dass zwar mittelsdes Abstandsensors der Abstand zum Werkstück exakt erfasst werden kann, jedoch die Zeit bis der Abstand zum Werkstück bei einer Abweichung erneut angepasst und eingestellt ist teilweise lange dauert, was zu einer Verschlechterung der Schnittqualität führt. Such a device is known from DE 203 14 281 Ul. This device has the disadvantage that, although by means of the distance sensor, the distance to the workpiece can be detected exactly, but the time until the distance to the workpiece is adjusted again and set at a deviation sometimes takes a long time, which leads to a deterioration of the quality of cut.
Darstellung der Erfindung Presentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum teilweisen Durchtrennen eines Werkstücks zu schaffen, die die bekannten Probleme aus dem Stand der Technik löst und die dazu geeignet ist, auf Abstandsveränderungen zwischen Werkstück und Schneideinrichtung schnell zu reagieren und somit die Schnittqualität zu verbessern. The invention has for its object to provide an apparatus for partially severing a workpiece, which solves the known problems of the prior art and which is adapted to quickly respond to changes in distance between the workpiece and cutter and thus to improve the quality of cut.
Die Lösung der Aufgabe erfolgt durch eine Vorrichtung gemäß dem Gegenstand des Patentanspruchs 1. Alternative Ausgestaltungen der erfindungsgemäßen Vorrichtung ergeben sich aus den Unteransprüchen. The object is achieved by a device according to the subject of claim 1. Alternative embodiments of the device according to the invention will become apparent from the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, die Schneideinrichtung dahingehend zu optimieren, dass diese in der Lage ist, besonders zügig auf Abstandsänderungen zwischen Schneideinrichtung und Werkstück zu reagieren. The invention is based on the idea of optimizing the cutting device in such a way that it is able to respond particularly quickly to changes in distance between the cutting device and the workpiece.
Die erfindungsgemäße Vorrichtung zum teilweisen Durchtrennen eines Werkstücks, das bevorzugt zumindest abschnittsweise aus Leder, Kunststoff oder dergleichen besteht, umfasst dazu eine Auflage für das Werkstück, eine von einer Führungseinrichtung geführte Schneideinrichtung, die mittels einer Halterung an einer Werkzeugaufnahme der Führungseinrichtung angeordnet ist, sowie ein an der Werkzeugaufnahme angeordnetes Erfassungselement, das zur Erfassung eines Abstandes zwischen dem Erfassungselement und der Auflage ausgebildet ist. Dabei ist die Halterung zusätzlich zu einemThe inventive device for partially severing a workpiece, which preferably at least partially made of leather, plastic or the like, comprises for this purpose a support for the workpiece, guided by a guide means cutting device which is arranged by means of a holder on a tool holder of the guide means, as well as a arranged on the tool holder detection element, which is designed to detect a distance between the detection element and the support. The holder is in addition to a
Führungseinrichtungsantrieb durch einen an derGuide mechanism drive by a at the
Werkzeugaufnahme angeordneten Antrieb in Bezug auf die Werkzeugaufnahme im Wesentlichen senkrecht zur Oberfläche der Auflage verschiebbar. Dadurch, dass ein zusätzlicher an der Werkzeugaufnahme angeordneter Antrieb vorgesehen ist, ist es möglich, die Halterung und damit die Schneideinrichtung von der Werkzeugaufnahme zu entkoppeln, so dass beim Bewegen der Halterung durch den Antrieb die Trägheit der bewegten Teile (also der Schneideinrichtung) wesentlich reduziert wird, so dass auf einen sich veränderten Abstand zwischen Auflage und Schneideinrichtung, welcher durch das Erfassungselement erfasst wird, unmittelbar und im Wesentlichen unverzögert reagiert werden kann. Auf diese Weise ist es möglich, eine Restwerkstückstärke beim teilweisen Durchtrennen des Werkstücks stets exakt einzuhalten, so dass die Bearbeitungsqualität verbessert wird. Tool holder arranged drive in relation to the tool holder substantially perpendicular to the surface of the support displaced. Characterized in that an additional arranged on the tool holder drive is provided, it is possible to decouple the holder and thus the cutting device of the tool holder, so that when moving the holder by the drive, the inertia of the moving parts (ie the cutting device) significantly reduced is, so that a changed distance between support and cutting device, which is detected by the detection element, can be reacted immediately and substantially instantaneously. In this way, it is possible to always maintain a residual workpiece thickness when partially severing the workpiece, so that the machining quality is improved.
In einer Ausgestaltung der Erfindung ist der Abstand der Schneideinrichtung zu der Auflage beim Schneiden durch den Führungseinrichtungsantrieb und/oder den Antrieb einstellbar. Auf diese Weise ist es mit Vorteil möglich, den Führungseinrichtungsantrieb bei großen Verstellbewegungen zu verwenden, um den Antrieb anforderungsgemäß zum unmittelbaren ausgleichen kleiner Verstellbewegungen zu verwenden, so dass die geforderte Restwerkstückstärke des Werkstücks mit Vorteil exakt eingehalten werden kann. In one embodiment of the invention, the distance of the cutting device to the support during cutting by the guide device drive and / or the drive is adjustable. In this way, it is advantageously possible to use the guide device drive for large adjustment movements to use the drive according to requirements for immediate compensation of small adjustment movements, so that the required residual workpiece thickness of the workpiece can be maintained with advantage exactly.
Gemäß einer weiteren besonders bevorzugten Ausführungsform der Erfindung ist der Antrieb ein Linearantrieb, der einen Servomotor umfasst. Auf diese Weise ist es besonders vorteilhaft möglich, den Antrieb schnell und exakt zur Einhaltung des Abstands zwischen Schneideinrichtung und Auflage zu verwenden. Der Servomotor kann dabei mit Vorteil einen Spindelantrieb umfassen. According to a further particularly preferred embodiment of the invention, the drive is a linear drive which comprises a servomotor. In this way, it is particularly advantageous possible to use the drive quickly and accurately to maintain the distance between the cutter and support. The servomotor can advantageously comprise a spindle drive.
Gemäß einer weiteren besonders bevorzugten Ausführungsform umfasst der Antrieb der Vorrichtung einen Piezoantrieb. Piezoantriebe haben den Vorteil, dass sie besonders schnell und ohne ein magnetisches Feld zu erzeugen den Antrieb in die gewünschte Position fahren können. Die Führungseinrichtung der Vorrichtung kann dabei zumindest zwei zueinander bewegliche, miteinander verbundene Achsen aufweisen. Auf diese Weise ist es möglich, die Beweglichkeit der Führungseinrichtung im Raum wesentlich zu erhöhen, so dass die Führungseinrichtung mit Vorteil unterschiedlichste Positionen anfahren kann und die Schneideinrichtung dort wirken kann. According to a further particularly preferred embodiment, the drive of the device comprises a piezo drive. Piezo drives have the advantage that they can drive the drive into the desired position particularly quickly and without generating a magnetic field. The guide device of the device may have at least two mutually movable, interconnected axes. In this way, it is possible to substantially increase the mobility of the guide device in space, so that the guide device can advantageously approach very different positions and the cutting device can act there.
Gemäß einer weiteren besonders bevorzugten Ausführungsform ist das Erfassungselement dazu ausgebildet, den Abstand zur Auflage induktiv zu erfassen. Auf diese Weise ist es möglich, den Abstand zu der Auflage zu erfassen, ohne dass das Werkstück die Abstandserfassung beeinflusst. Es ist also möglich, den Abstand zwischen Erfassungselement und Auflage sen, während ein Werkstück zwischen Erfassungselement und Auflage angeordnet ist . According to a further particularly preferred embodiment, the detection element is designed to detect the distance to the support inductively. In this way it is possible to detect the distance to the support without the workpiece influencing the distance detection. It is therefore possible, the distance between the sensing element and support sen, while a workpiece between detection element and support is arranged.
In einer weiteren bevorzugten Ausführungsform ist das Erfassungselement starr an der Werkzeugaufnahme angeordnet. Auf diese Weise ist es möglich, durch das unbeweglich angeordnete Erfassungselement den Abstand zwischen Aufnahme und Erfassungselement und damit den Abstand zwischen Aufnahme und Schneideinrichtung besonders exakt zu erfassen. In a further preferred embodiment, the detection element is rigidly arranged on the tool holder. In this way, it is possible to detect the distance between the recording and detection element and thus the distance between recording and cutting device by the immovably arranged detection element very accurately.
Gemäß einer weiteren besonders bevorzugten Ausführungsform ist die Führungseinrichtung ein Roboter, insbesondere ein Gelenkarmroboter. Auf diese Weise werden die Flexibilität und die Wirtschaftlichkeit der Vorrichtung mit Vorteil erhöht. According to a further particularly preferred embodiment, the guide device is a robot, in particular an articulated-arm robot. In this way, the flexibility and the economy of the device are advantageously increased.
Gemäß einer weiteren besonders bevorzugten Aüsführungsform ist die Schneideinrichtung mit einer feststehenden Klinge versehen und ist wahlweise dazu ausgebildet, ein Trennmittel in einen durchgeführten Schnitt einzubringen. Mittels einer feststehenden Klinge ist es möglich, gleichmäßige Schnitte in ein Werkstück einzubringen. Wenn dabei die Schneideinrichtung in einer alternativen Ausführungsform noch dazu ausgebildet ist, ein Trennmittel in einen durchgeführten Schnitt einzubringen, so ist es mit Vorteil möglich, vor einem etwaigen anschließenden Hinterschäumen des Werkstücks, den durchgeführten Schnitt so vorzubereiten, dass kein Schäummaterial oder dergleichen in den Schnitt eindringt. According to another particularly preferred embodiment, the cutting device is provided with a fixed blade and is optionally adapted to introduce a release agent in a cut performed. By means of a fixed blade it is possible to introduce even cuts into a workpiece. If, in this case, the cutting device is additionally formed in an alternative embodiment is to introduce a release agent in a cut performed, so it is advantageously possible, before any subsequent backfoaming of the workpiece to prepare the cut performed so that no foaming material or the like penetrates into the cut.
Alternativ kann die Schneideinrichtung alsAlternatively, the cutting device as
Sonotrodenschneideinrichtung und/oder als eine ein rotierendes Messer aufweisende Schneideinrichtung ausgebildet sein . Sonotrodesschneideinrichtung and / or be designed as a rotary blade having a cutting device.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Fig. 1 zeigt eine Führungseinrichtung mit einer erfindungsgemäßen Vorrichtung zum teilweisen Durchtrennen eines Werkstücks, 1 shows a guide device with a device according to the invention for partially severing a workpiece,
Fig. 2 zeigt einen Ausschnitt einer erfindungsgemäßen Fig. 2 shows a section of an inventive
Vorrichtung in vergrößerter Darstellung, und  Device in an enlarged view, and
Fig. 3 zeigt ein Blockdiagramm, aus dem sich die Fig. 3 shows a block diagram of which the
Ansteuerung des Führungseinrichtungsantriebs und des Antriebs ergeben.  Actuation of the guide device drive and the drive result.
Ausführliche Beschreibung bevorzugter Ausführungsformen der Erfindung Detailed description of preferred embodiments of the invention
Die Erfindung wird nachfolgend anhand eines exemplarischen Beispiels unter Bezugnahme auf die Fig. 1-3 beschrieben. The invention will now be described by way of example with reference to Figs. 1-3.
Dabei zeigt Fig. 1 eine an einer Führungseinrichtung 20 angeordnete erfindungsgemäße Vorrichtung 10. Die Führungseinrichtung 20, welche in der gezeigten Ausführungsform als (Gelenkarm-) Roboter 20 gezeigt ist, ist so im Raum verfahrbar, dass die Schneideinrichtung 14 unmittelbar über einem auf einer Auflage 12 (nicht gezeigt) aufgelegten Werkstück 11 angeordnet werden kann. Die Vorrichtung 10 weist dabei eine Werkzeugaufnahme 22 auf, wobei insbesondere auf Fig. 2 verwiesen wird. An der Werkzeugaufnahme 22 ist ein Antrieb 24 vorgesehen, an welchem eine Halterung 16 angebracht ist. Dabei ist der stationäre Teil des Antriebs 24 an der Werkzeugaufnahme 22 befestigt und der bewegte Teil des Antriebs 24 an der Halterung 16. FIG. 1 shows a device 10 according to the invention arranged on a guide device 20. The guide device 20, which is shown in the embodiment shown as (articulated arm) robot 20, can be moved in space such that the cutting device 14 directly over one on a support 12 (not shown) placed workpiece 11 can be arranged. The device 10 in this case has a tool holder 22, reference being made in particular to FIG. 2. At the tool holder 22, a drive 24 is provided, on which a holder 16 is mounted. In this case, the stationary part of the drive 24 is fixed to the tool holder 22 and the moving part of the drive 24 to the holder 16.
An der Halterung 16 ist eine Schneideinrichtung 14 angeordnet. Die Halterung 16 ist mittels des Antriebs 24 so verfahrbar, dass, wenn die Schneideinrichtung 14 in etwa in Schneidposition über dem Werkstück 11 angeordnet ist, diese in etwa senkrecht zur Oberfläche der Auflage 12 verfahrbar On the holder 16, a cutting device 14 is arranged. The holder 16 is moved by means of the drive 24 so that when the cutting device 14 is arranged approximately in the cutting position above the workpiece 11, this can be moved approximately perpendicular to the surface of the support 12
An der Werkzeugaufnahme 22 ist ferner ein Erfassungseiement 26 angeordnet, welches dazu ausgebildet ist, den Abstand zwischen Aufnahme 12 und Erfassungselement 26 zu erfassen. Das Erfassungselement 26 ist dabei in der gezeigten Ausführungsform in der Nähe der Schneideinrichtung 14 angeordnet . On the tool holder 22, a detection element 26 is further arranged, which is adapted to detect the distance between the receptacle 12 and detection element 26. The detection element 26 is arranged in the embodiment shown in the vicinity of the cutting device 14.
Mit dem Erfassungselement 26 wird der Abstand zwischen Auflage 12 und Erfassungseiement 26 fortlaufend erfasst. Dadurch, dass die Position der Schneideinrichtung 14 bedingt durch den bekannten Ausfahrgrad des Antriebs 24 in Bezug auf die Werkzeugaufnahme 22 bekannt ist, ist es möglich, aus dem Abstand zwischen Erfassungselement 26 und Auflage 12 den Abstand zwischen Schneideinrichtung 14 und Auflage 12 zu ermitteln. Auf diese Weise kann während dem Schneiden mit der Schneideinrichtung 14 fortlaufend die Restwerkstückstärke des Werkstücks 11 bestimmt werden. With the detection element 26, the distance between support 12 and detection element 26 is detected continuously. Characterized in that the position of the cutting device 14 is known due to the known degree of extension of the drive 24 with respect to the tool holder 22, it is possible to determine the distance between the cutting device 14 and support 12 from the distance between the detection element 26 and support 12. In this way, during the cutting with the cutting device 14, the residual workpiece thickness of the workpiece 11 can be determined continuously.
Tritt beim Schneiden mit der Schneideinrichtung 14 eine Veränderung des Abstands zwischen Auflage und Erfassungselement 26 auf, so erfasst das Erfassungselement 26 dies und veranlasst selbstständig bzw. über eine geeignete Steuereinrichtung, dass der Antrieb 24 diese Abstandsänderung unmittelbar korrigiert. Da der Antrieb 24 in der gezeigten Ausführungsform lediglich die Schneideinrichtung 14 und die Halterung 16 bewegt, ist die Trägheit der bewegten Massen sehr gering, wodurch es möglich ist, unmittelbar auf Abstandsänderungen zwischen dem Erfassungselement 26 und der Auflage 12 zu reagieren. Dies hat den Vorteil, dass die Führungseinrichtung 20 nicht fortwährend nachregeln muss, sondern dass es genügt, lediglich die Halterung 16 und damit die Schneideinrichtung 14 zu verfahren. Auf diese Weise werden sehr genaue Bearbeitungsergebnisse erzielt. Occurs when cutting with the cutting device 14, a change in the distance between support and detection element 26, the detection element 26 detects this and causes independently or via a suitable control device that the drive 24 this change in distance corrected immediately. Since the drive 24 in the embodiment shown moves only the cutting device 14 and the holder 16, the inertia of the moving masses is very low, which makes it possible to react directly to changes in distance between the detection element 26 and the support 12. This has the advantage that the guide device 20 does not have to constantly readjust, but that it is sufficient to move only the holder 16 and thus the cutting device 14. In this way, very accurate machining results are achieved.
Fig. 3 zeigt ein Blockdiagramm zur Ansteuerung einer erfindungsgemäßen Vorrichtung. Dabei ist eineFig. 3 shows a block diagram for driving a device according to the invention. There is one
Führungseinrichtung 20 gezeigt, die eine Bearbeitungskurve für die Schneideinrichtung 14 vorgibt. Diese Kurve wird beispielsweise mit einem -sogenannten Feldbus umgesetzt. Während der Umsetzung überwacht das Erfassungselement 26. den Abstand zist zwischen Erfassungselement 26 und Auflage 12. Bei einer Abweichung von zist vom Sollwert entsteht eine Regelabweichung, die von dem Erfassungselement 26 erfasst wird und durch den Antrieb 24 ausgeglichen wird, indem der Antrieb 24 die Halterung 16 in Richtung der Auflage 12 und damit des Werkstücks 11 bewegt. Bei einer umgekehrten Sollwertabweichung wird dieser Vorgang umgekehrt. Auf diese Weise können kleine Schwankungen des Sollabstands zist im Wesentlichen unmittelbar ausgeglichen werden, so dass eine gleichmäßige Restwerkstückstärke beim Schneiden mit der Schneideinrichtung 14 erzielt werden kann. Es ist dabei möglich, insofern eine Abweichung, welche mittels dem Antrieb 24 ausgeglichen wurde, über einen längeren Zeitraum besteht, die Werkzeugaufnahme 22 nachzuführen, so dass die Halterung 16 sich wieder in einer in etwa „mittigen" Position befindet. Auf diese Weise hat der Antrieb 24 jederzeit eine genügend große Strecke, auf der er in beide Richtungen verfahrbar ist, zur Verfügung. Guiding device 20, which specifies a machining curve for the cutting device 14. This curve is implemented, for example, with a so-called fieldbus. During the reaction 26 monitors the detection element of the distance z is between sensing element 26 and bearing 12. In one deviation of z is formed from the nominal value a regulating deviation, which is detected by the detection element 26 and is compensated for by the drive 24 by the drive 24 the holder 16 in the direction of the support 12 and thus of the workpiece 11 moves. If the setpoint deviation is reversed, this process is reversed. In this way, small fluctuations of the desired distance z is can be compensated substantially directly, so that a uniform residual workpiece thickness can be achieved when cutting with the cutting device 14. It is possible, insofar as a deviation, which has been compensated by the drive 24, over a longer period of time, to track the tool holder 22 so that the holder 16 is again in an approximately "centered" position Drive 24 at any time a sufficiently large distance, on which it is movable in both directions available.

Claims

Patentansprüche  claims
Vorrichtung (10) zum teilweisen Durchtrennen eines Werkstücks (11), welches bevorzugt zumindest Device (10) for partially severing a workpiece (11), which preferably at least
abschnittsweise aus Leder, Kunststoff oder dergleichen besteht, umfassend partially made of leather, plastic or the like, comprising
- eine Auflage (12) für das Werkstück (11), a support (12) for the workpiece (11),
- eine von einer Führungseinrichtung (20) geführte Schneideinrichtung (14), die mittels einer  - One of a guide means (20) guided cutting device (14) by means of a
Halterung (16) an einer Werkzeugaufnahme (22) der Führungseinrichtung (20) angeordnet ist, sowie Holder (16) on a tool holder (22) of the guide device (20) is arranged, and
- ein an der Werkzeugaufnahme (22) angeordnetes Erfassungselement (26) , das zur Erfassung eines Abstandes zwischen dem Erfassungselement (26) und der Auflage (12) ausgebildet ist, dadurch gekennzeichnet, dass - A on the tool holder (22) arranged detection element (26) which is adapted to detect a distance between the detection element (26) and the support (12), characterized in that
- die Halterung (16) zusätzlich zu einem - The holder (16) in addition to a
Führungseinrichtungsantrieb durch einen an der Werkzeugaufnahme (22) angeordneten Antrieb (24) in Bezug auf die Werkzeugaufnahme (22) im Wesentlichen senkrecht zur Oberfläche der Auflage (12)  Guide device drive by a drive (24) arranged on the tool holder (22) with respect to the tool holder (22) substantially perpendicular to the surface of the support (12)
verschiebbar ist.  is displaceable.
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Abstand der Schneideinrichtung (14) zu der Auflage (12) beim Schneiden durch den Apparatus according to claim 1, characterized in that the distance of the cutting device (14) to the support (12) when cutting through the
Führungseinrichtungsantrieb und/oder den Antrieb (24) einstellbar ist. Vorrichtung nach Anspruch 1 oder 2, dadurch Guide device drive and / or the drive (24) is adjustable. Apparatus according to claim 1 or 2, characterized
gekennzeichnet, dass der Antrieb (24) ein Linearantrieb ist, wobei der Linearantrieb einen Servomotor umfasst. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Servomotor einen Spindelantrieb umfasst. Vorrichtung nach Anspruch 1 oder 2, dadurch characterized in that the drive (24) is a linear drive, wherein the linear drive comprises a servo motor. Apparatus according to claim 3, characterized in that the servomotor comprises a spindle drive. Apparatus according to claim 1 or 2, characterized
gekennzeichnet, dass der Antrieb (24) einen Piezoantrieb umfasst . Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Führungseinrichtung (20) zumindest zwei relativ zueinander bewegliche, miteinander verbundene Achsen aufweist. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Erfassungselement (26) dazu ausgebildet ist, den Abstand zu der Auflage (12) induktiv zu erfassen. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Erfassungselement (26) starr an der Werkzeugaufnahme (22) angeordnet ist. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Führungseinrichtung (20) ein Roboter, insbesondere ein Gelenkarmroboter ist. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schneideinrichtung (14) eine feststehende Klinge aufweist oder dass die characterized in that the drive (24) comprises a piezo drive. Device according to one of the preceding claims, characterized in that the guide device (20) has at least two relatively movable, interconnected axes. Device according to one of the preceding claims, characterized in that the detection element (26) is adapted to detect the distance to the support (12) inductively. Device according to one of the preceding claims, characterized in that the detection element (26) is rigidly arranged on the tool holder (22). Device according to one of the preceding claims, characterized in that the guide device (20) is a robot, in particular an articulated arm robot. Device according to one of the preceding claims, characterized in that the cutting device (14) has a fixed blade or that the
Schneideinrichtung (14) eine feststehende Klinge Cutting device (14) a fixed blade
aufweist und dazu ausgebildet ist ein Trennmittel in einen durchgeführten Schnitt einzubringen. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schneideinrichtung (14) eine Sonotrodenschneideinrichtung und/oder eine ein rotierendes Messer aufweisende Schneideinrichtung ist. has and is adapted to introduce a release agent in a cut performed. Device according to one of the preceding claims, characterized in that the cutting device (14) is a sonotrode cutting device and / or a cutter having a rotating blade.
PCT/EP2011/050020 2010-01-05 2011-01-03 Device for partially severing a workpiece WO2011083102A2 (en)

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