EP1215148A1 - Device for separating flexible plate-like workpieces from a stack, in particular metal sheets - Google Patents

Device for separating flexible plate-like workpieces from a stack, in particular metal sheets Download PDF

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Publication number
EP1215148A1
EP1215148A1 EP00126628A EP00126628A EP1215148A1 EP 1215148 A1 EP1215148 A1 EP 1215148A1 EP 00126628 A EP00126628 A EP 00126628A EP 00126628 A EP00126628 A EP 00126628A EP 1215148 A1 EP1215148 A1 EP 1215148A1
Authority
EP
European Patent Office
Prior art keywords
separating
suction
workpiece
edge
separating suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00126628A
Other languages
German (de)
French (fr)
Other versions
EP1215148B1 (en
Inventor
Siegfried Dachtler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Priority to DE50009373T priority Critical patent/DE50009373D1/en
Priority to AT00126628T priority patent/ATE287849T1/en
Priority to EP00126628A priority patent/EP1215148B1/en
Priority to US10/005,576 priority patent/US6886827B2/en
Priority to JP2001370507A priority patent/JP3857117B2/en
Publication of EP1215148A1 publication Critical patent/EP1215148A1/en
Application granted granted Critical
Publication of EP1215148B1 publication Critical patent/EP1215148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0816—Suction grippers separating from the top of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0883—Construction of suction grippers or their holding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/48—Air blast acting on edges of, or under, articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/34—Suction grippers
    • B65H2406/341—Suction grippers being oscillated in arcuate paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/34—Suction grippers
    • B65H2406/342—Suction grippers being reciprocated in a rectilinear path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/173—Metal

Definitions

  • the invention relates to a device for separating flexible plate-like workpieces of a stack, in particular of sheets of a sheet stack, with at least one suction cup as well as with suction cups that are at least partially opposite at least a suction cup to a workpiece edge are arranged, with at least one suction pad and the suction pad on contact surfaces with negative pressure on a workpiece surface of the workpiece lying outermost in the stack are and wherein that of at least one suction cup and the Vacuum cleaners loaded workpiece while moving the vacuum of the suction pads on the workpiece relative to the contact surface of at least one vacuum cleaner by one in the direction of the workpiece edge assigned to the separating suction devices extending axis to the side of the workpiece loading is bendable.
  • Stapels EP-B-0 639 519 discloses a device of the entry mentioned type, on the of a plurality of in the longitudinal direction of the assigned workpiece edge of adjacent suction cups Use is made.
  • the object of the present invention is to ensure reliable operation Device for separating flexible plate-like Workpieces in a stack, in particular sheet metal Sheet stack to provide.
  • this object is achieved by a generic Device with the characteristic features of the independent Claim 1. These features will be a Axis of the workpiece bending in the case of devices according to the invention in a particularly effective way using separating suction cups defined in the transverse direction of the assigned workpiece edge are mutually offset.
  • Claim 2 describes a particularly useful possibility to generate the offset of the contact surface according to the invention at least one edge at least opposite the contact surface of an internal vacuum cleaner in the transverse direction of the workpiece surface loaded on the separating suction cups.
  • the claimed Variation of the compression of the suction cups on the Vacuum cleaners can be different measures achieve. For example, on the edge and on the inside Vacuum cleaners different in amount from each other Pressures are created. Preferred according to the invention however, the measure described in claim 3, which is constructively and / or pressure control technology particularly simple can be implemented.
  • the workpiece stop or stops according to claim 4 cause one particularly pronounced definition of the bending axis of the Vacuum cleaners and at least one vacuum cleaner Workpiece.
  • the separation workpieces sticking together by swiveling the supporting structure for at least one vacuum cleaner around the demanding Axis are supported.
  • the separating nozzle arrangement according to claim 9 is used for workpieces the one that emerges at this separating nozzle arrangement is effective flowing pressure medium with pulsating task in the direction on the end face of the workpiece edge assigned to the suction cups (Claim 10) and / or if it is the separating nozzle arrangement exits through nozzle outlets as described in claim 11 are arranged.
  • a device 1 for Separating sheets 2 of a stack 3 of sheets as a support frame 4 trained support structure for vacuum 5 and a support structure designed as a separating suction frame 6 for Separating suction device 7.
  • the separating suction device frame 6 is on the support suction device frame 4 pivotally mounted about a horizontal axis 8.
  • a separating nozzle arrangement 9 is located above the separating suction frame 6 the support frame 4 pivotable about a horizontal axis 10 supported.
  • the separating nozzle arrangement 9 is located opposite the support frame 4 a sheet thickness measuring device 11. This too can be swiveled around a horizontal axis.
  • This axis is in Fig. 1 assigned the reference numeral "12".
  • Guide arms 13 are pivoted about an axis 14 on the support frame 4.
  • the support frame 4 is in the three coordinate directions x, y, z of the room computer controlled traversable.
  • the suction frame 4 On its underside facing the sheet metal stack 3 the suction frame 4 has a plurality of the conventional ones Carrier suction 5 on the pneumatic lines, not shown with a pneumatic pressure source, also not shown stay in contact.
  • the suction cups have 5 a suction base 16 and a held thereon Rubber suction cup 17, which in turn an annular contact surface on the side facing the sheet metal stack 3 18 trains.
  • the mutual spacing of the suction cups 5 are just like the dimensions of the suction frame 4 depending on the size of the sheets 2 selected.
  • the sheet metal stack 3 rests on a workpiece support 19 are the individual sheets 2 of the sheet stack 3 by means of positioning stops 20 laterally supported and defined horizontally aligned.
  • FIGS. 1 and 5 is the separating suction frame 6 on one Longitudinal edge of the sheets 2 facing side of the suction cup 5 arranged.
  • the separating suction frame carries 6 on its underside a separating suction pad with a A plurality of separating suction devices 7, some of which serve as an edge-side separating suction device 7a on the associated longitudinal edge of the sheets 2 Side of the suction cup frame 6 and partly as an internal one Vacuum cleaner 7b on the from the said longitudinal edge Sheets 2 facing away from the edge-side separating suction 7a provided are.
  • the internal suction cups 7b are there between workpiece stops 21.
  • the imaginary connecting line the internal separating suction device 7b and the workpiece stops 21 runs parallel to the longitudinal edge assigned to the separating suction devices 7 the metal sheets 2.
  • the separating suction devices 7 are also not shown Pneumatic lines with the pneumatic pressure source of the Device 1 in connection.
  • the separating suction device on the edge 7a each have one attached to the separating suction frame 6 Vacuum cleaner base body 22 and a vacuum cleaner collar held thereon 23.
  • the internal separating suction cups 7b point accordingly a separating suction base 24 and a separating suction collar 25 on.
  • On her facing the sheet stack 3 Side are the suction cups 23 of the edge Vacuum cleaner 7a each with a contact surface 26, the vacuum cleaner sleeves 25 of the internal separating suction cups 7b each with provided a contact surface 27.
  • Both the suction cups 23 of the edge-side separating suction cups 7a as well as the separating suction cups 25 of the internal suction cups 7b are as folded bellows formed.
  • the investment areas 26, 27 of the edge-side separating suction device 7a and the inner one Vacuum cleaners 7b are in a common state in their initial state Level. Opposite the free ends of the workpiece stops 21 are the mentioned contact surfaces 26, 27 in the starting position advanced to the sheet stack 3.
  • the swivel drive shown is the separating suction frame 6 with the attached suction cups 7 and the workpiece stops 21 rotatable about the axis 8. The swivel drive is called just like all other functions of the device 1 by one Computer control numerically controlled.
  • the device 1 is part of a comprehensive system for Processing of the sheets 2 and thereby a conventional sheet metal processing machine upstream in the process.
  • the computer control the device 1 is in the CNC control of the entire system integrated.
  • FIG. 5 shows the device 1 in the initial state. she lies at a distance above the sheet stack 3.
  • the separating suction frame 6 is slightly inclined and with its free End pivoted upwards against the horizontal. The simplicity for the sake of that is in Fig. 5 and the following Figs. 6 to 11 only a part of that provided on the separating suction frame 6 Vacuum cleaner 7 shown.
  • the contact surfaces 26 of the suction cup frame 6 attached edge separating suction 7a as well the contact surfaces 27 of the internal suction cups 7b are located in a common, according to the inclination of the vacuum cleaner frame 6 level and are the free ends the workpiece stops 21 upstream of the sheet stack 3.
  • the separating nozzle arrangement 9 and the sheet thickness measuring device 11 are based on those of the side of the support frame 4 pivoted away from the sheet stack 3 and take their rest position there. Also in the rest position are the guide arms 13, which are extend horizontally along the support frame 4.
  • the in the sheet metal stack 3 is initially the sheet metal 2 lying outermost in the figures 5 to 11 the reference symbol "2a", the one below are assigned the reference symbol "2b".
  • the device 1 is based on its position according to FIG. 5 lowered in the z-direction onto the sheet stack 3.
  • the Carrier suction 5 with their contact surfaces 18 facing them Surface of the sheet lying outermost in the sheet stack 3 2a created.
  • the separating suction frame 6 still takes its Starting position according to FIG. 5.
  • the contact surfaces 26, 27 of the separating suction device 7a on the edge or the internal separating suction device 7b are accordingly those of the load applied by the suction cups 5 Sheet 2a slightly spaced.
  • the device 1 is then a vacuum to the Carrier suction 5 created. As a result, these suck on the Sheet 2a fixed.
  • a contact between the sheet 2a and the edge Vacuum cleaners 7a and the internal vacuum cleaners 7b on the separating suction frame 6 is still not manufactured. All in all, the ones illustrated in FIG. 6 result Conditions.
  • the device 1 With the sheet 2a sucked in, the device 1 in FIG z direction raised. Then the sheet thickness gauge 11 from its rest position according to FIGS. 5 and 6 around Axis 12 pivoted into its functional position, in which the Measuring head of the conventional sheet thickness measuring device 11 at height of the sheet 2a held by the suction cups 5 is arranged. The separating suction frame 6 and the separating nozzle arrangement 9 and the Guide arms 13 are still in their starting position.
  • the sheet thickness measuring device 11 is used to check whether the Device 1 as desired only the sheet 2a or accidentally has lifted several sheets 2 from the sheet stack 3. According to 7 is determined in the example shown, that on the held by the suction cups 5 and previously in the Sheet stack 3 of the most arranged sheet 2a undesirably the sheet 2b adheres.
  • the separating suction frame 6 about the axis 8 from its starting position lowered.
  • the separation nozzle arrangement 9 continues to decrease before their rest position. Also in the rest position the plate thickness measuring device swung up again 11 (Fig. 8).
  • the suction cups 23 of the edge suction 7a become stronger under the effect of the applied negative pressure compressed as the separating suction cups 25 on the inside Separating suction cups 7b. Accordingly, those on the opposite Surface of the sheet 2a abutting contact surfaces 26th the edge-side separating suction 7a in the transverse direction of the above Sheet metal surface opposite the free ends of the workpiece stops 21 and the contact surfaces 27 of the internal separating suction 7b reset.
  • the two sheets clinging together 2a, 2b are consequently associated with the separating suction devices 7 on their Longitudinal edge around a by means of the workpiece stops 21st and the internal separating suction device 7b defined axis to the Side of the sheet loading by the suction cup 5 and the Separating suction 7, i.e. bent towards the side of the device 1.
  • this is the same as that of the suction cups 5 and the separating suction cups 7 acted directly on Sheet 2a adhering sheet 2b strives, automatically to restore its flat shape.
  • the elastic restoring forces the sheet 2b begins starting from its longitudinal edge assigned to the separating suction devices 7 to be detached from the sheet 2a. The result is that in FIG. 9 shown relationships.
  • the automatically initiated separation of the two is supported Sheets 2a, 2b by pivoting the separating suction frame 6 9 into its starting position according to FIG. 10.
  • the edge-side separating suction 7a and the inside Vacuum cleaners 7b are still under the effect of vacuum applied to them.
  • the sheet 2a is after as before used on the workpiece stops 21.
  • opening separating gap is in its functional position pivoted separation nozzle assembly 9 as a flowing pressure medium Compressed air in the direction of the face of the sheet metal edge. This compressed air also supports the separation of the two sheets 2a, 2b held on the device 1 (FIG. 10).
  • the nozzle arrangement 9 is shown in detail in FIG. 12.
  • This figure shows the nozzle arrangement 9 in a top view on nozzle outlets 28, the functional position of the separating nozzle arrangement 9 (FIGS. 10, 11) the respective longitudinal edge of each other adhesive sheets 2a, 2b opposite.
  • evidenced Fig. 12 are the nozzle outlets 28 along the separating suction 7 assigned edge of the sheets 2a, 2b and in the transverse direction of the sheet metal surface acted upon by the separating suction devices 7 against one another added.
  • the compressed air supply at the nozzle outlets 28 the separating nozzle arrangement 9 is pulsating.
  • the edge-side vacuum cleaners 7a and the internal vacuum cleaners 7b are after detaching the adhering to the sheet 2a Sheet 2b depressurized. The one they previously charged The edge of the sheet 2a can consequently be in its horizontal Spring back the situation. After a control measurement using the Sheet thickness measuring device 11 by means of the device 1 the still suction vacuum 5 finally held sheet 2a by a corresponding method of the device 1 to a workpiece support of one of the devices 1 in the downstream processing machine transported and filed there.
  • the Separating suction cups 7 are then already applied to the sheet 2a, if this is still on the sheet stack 3.
  • the case is the suction frame 4 from the raised position 5 into the position shown in FIG. 6.
  • the suction cup 5 then act on the surface of the Sheets 2a, but are not necessarily already under one Vacuum.
  • the separating suction frame 6 is described as for FIG. 8 swung down from its starting position; the edge-side separators 7a and the internal separators 7b come to rest on the surface of the sheet 2a. Now a vacuum is applied to the separating suction device 7, so the sheet 2a bent up at its edge assigned to the suction cups 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

The device for separating individual metal sheets (2a, 2b) from a stack (3) has supporting suction cups (5) and inner (7b) and outer (7a) separating suction cups. The vacuum applied to the outer cups is greater than that applied to the inner cups, so that the sheet is temporarily bent upwards towards its edge.

Description

Die Erfindung betrifft eine Vorrichtung zum Vereinzeln von flexiblen plattenartigen Werkstücken eines Stapels, insbesondere von Blechen eines Blechstapels, mit wenigstens einem Tragsauger sowie mit Trennsaugern, die wenigstens zum Teil gegenüber wenigstens einem Tragsauger zu einem Werkstückrand hin versetzt angeordnet sind, wobei wenigstens ein Tragsauger und die Trennsauger an Anlageflächen mit Unterdruck an einer Werkstückoberfläche des in dem Stapel zuäußerst liegenden Werkstücks anlegbar sind und wobei das von wenigstens einem Tragsauger und den Trennsaugern beaufschlagte Werkstück unter Bewegen der mit Unterdruck an dem Werkstück anliegenden Anlageflächen der Trennsauger relativ zu der Anlagefläche wenigstens eines Tragsaugers um eine in Richtung des den Trennsaugern zugeordneten Werkstükkrandes verlaufende Achse zu der Seite der Werkstückbeaufschlagung hin biegbar ist.The invention relates to a device for separating flexible plate-like workpieces of a stack, in particular of sheets of a sheet stack, with at least one suction cup as well as with suction cups that are at least partially opposite at least a suction cup to a workpiece edge are arranged, with at least one suction pad and the suction pad on contact surfaces with negative pressure on a workpiece surface of the workpiece lying outermost in the stack are and wherein that of at least one suction cup and the Vacuum cleaners loaded workpiece while moving the vacuum of the suction pads on the workpiece relative to the contact surface of at least one vacuum cleaner by one in the direction of the workpiece edge assigned to the separating suction devices extending axis to the side of the workpiece loading is bendable.

Im Rahmen gängiger Verfahren zur Bearbeitung plattenartiger Werkstücke sind der Bearbeitungsmaschine die zu bearbeitenden Werkstücke aus einem entsprechenden Stapel einzeln zuzuführen. Insbesondere in Fällen, in denen die gestapelten Werkstücke mit einer Folie beschichtet und/oder - im Falle metallischer Werkstücke - aus Gründen des Korrossionsschutzes eingeölt sind, können sich beim Vereinzeln der Werkstücke insofern Probleme ergeben, als in dem Stapel einander benachbarte Werkstücke aneinander haften können. Zu beobachten ist dieses Problem insbesondere bei dünnen Werkstücken.As part of common processes for processing plate-like Workpieces are the machine to be machined Feed workpieces from a corresponding stack individually. Especially in cases where the stacked workpieces with coated with a film and / or - in the case of metallic workpieces - are oiled for corrosion protection reasons, problems can arise when separating the workpieces result as mutually adjacent workpieces in the stack can be liable. This problem is particularly noticeable for thin workpieces.

Zum Vereinzeln horizontal angeordneter Werkstückplatten eines Stapels offenbart EP-B-0 639 519 eine Vorrichtung der eingangs genannten Art, an der von einer Mehrzahl von in Längsrichtung des zugeordneten Werkstückrandes nebeneinander liegenden Trennsaugern Gebrauch gemacht wird. For separating horizontally arranged workpiece plates one Stapels EP-B-0 639 519 discloses a device of the entry mentioned type, on the of a plurality of in the longitudinal direction of the assigned workpiece edge of adjacent suction cups Use is made.

Aufgabe der vorliegenden Erfindung ist es, eine funktionssichere Vorrichtung zum Vereinzeln von flexiblen plattenartigen Werkstücken eines Stapels, insbesondere von Blechen eines Blechstapels, bereitzustellen.The object of the present invention is to ensure reliable operation Device for separating flexible plate-like Workpieces in a stack, in particular sheet metal Sheet stack to provide.

Erfindungsgemäß gelöst wird diese Aufgabe durch eine gattungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des unabhängigen Anspruchs 1. Diesen Merkmalen entsprechend wird eine Achse der Werkstückbiegung im Falle erfindungsgemäßer Vorrichtungen auf besonders wirksame Art und Weise mittels Trennsaugern definiert, die in Querrichtung des zugeordneten Werkstükkrandes gegeneinander versetzt angeordnet sind.According to the invention, this object is achieved by a generic Device with the characteristic features of the independent Claim 1. These features will be a Axis of the workpiece bending in the case of devices according to the invention in a particularly effective way using separating suction cups defined in the transverse direction of the assigned workpiece edge are mutually offset.

Bevorzugte Erfindungsbauarten ergeben sich aus den abhängigen Ansprüchen 2 bis 11.Preferred types of invention result from the dependent ones Claims 2 to 11.

Anspruch 2 beschreibt eine besonders zweckmäßige Möglichkeit zur Erzeugung des erfindungsgemäßen Versatzes der Anlagefläche wenigstens eines randseitigen gegenüber der Anlagefläche wenigstens eines innenliegenden Trennsaugers in Querrichtung der von den Trennsaugern beaufschlagten Werkstückoberfläche. Die beanspruchte Variation der Stauchung der Saugermanschetten an den Trennsaugern lässt sich dabei durch unterschiedliche Maßnahmen erzielen. Beispielsweise können an randseitigen und an innenliegenden Trennsaugern ihrem Betrag nach voneinander verschiedene Unterdrücke angelegt werden. Erfindungsgemäß bevorzugt wird jedoch die in Anspruch 3 beschriebene Maßnahme, die sich konstruktiv und/oder drucksteuerungstechnisch besonders einfach umsetzen lässt.Claim 2 describes a particularly useful possibility to generate the offset of the contact surface according to the invention at least one edge at least opposite the contact surface of an internal vacuum cleaner in the transverse direction of the workpiece surface loaded on the separating suction cups. The claimed Variation of the compression of the suction cups on the Vacuum cleaners can be different measures achieve. For example, on the edge and on the inside Vacuum cleaners different in amount from each other Pressures are created. Preferred according to the invention however, the measure described in claim 3, which is constructively and / or pressure control technology particularly simple can be implemented.

Der oder die Werkstückanschläge gemäß Anspruch 4 bewirken eine besonders ausgeprägte Definition der Biegeachse des von den Trennsaugern und wenigstens einem Tragsauger beaufschlagten Werkstückes.The workpiece stop or stops according to claim 4 cause one particularly pronounced definition of the bending axis of the Vacuum cleaners and at least one vacuum cleaner Workpiece.

Die Entkoppelung von Trag- und Trennsaugern nach Anspruch 5 erlaubt es, die Trennsauger nur dann an dem in dem Stapel zuäußerst liegenden Werkstück anzulegen, wenn an diesem unerwünschterweise ein weiteres Werkstück haftet. Die Ansprüche 6 und 7 beschreiben Möglichkeiten zur Realisierung der genannten Entkoppelung.The decoupling of portable and separating suckers allowed according to claim 5 it, the separating suction cups only on the outermost in the stack to create a lying workpiece if this is undesirable another workpiece sticks. Claims 6 and 7 describe options for realizing the above-mentioned decoupling.

Im Falle der Erfindungsbauart nach Anspruch 8 kann das Trennen aneinander haftender Werkstücke durch Schwenken der Tragstruktur für wenigstens einen Trennsauger um die anspruchsgemäße Achse unterstützt werden.In the case of the type of invention according to claim 8, the separation workpieces sticking together by swiveling the supporting structure for at least one vacuum cleaner around the demanding Axis are supported.

Ebenfalls der Unterstützung der Trennung aneinander haftender Werkstücke dient die Trenndüsenanordnung gemäß Anspruch 9. Besonders wirksam ist das an dieser Trenndüsenanordnung austretende strömende Druckmedium bei pulsierender Aufgabe in Richtung auf die Stirnseite des den Trennsaugern zugeordneten Werkstückrandes (Anspruch 10) und/oder wenn es die Trenndüsenanordnung durch Düsenauslässe verlässt, die wie in Anspruch 11 beschrieben angeordnet sind.Also supporting the separation of each other The separating nozzle arrangement according to claim 9 is used for workpieces the one that emerges at this separating nozzle arrangement is effective flowing pressure medium with pulsating task in the direction on the end face of the workpiece edge assigned to the suction cups (Claim 10) and / or if it is the separating nozzle arrangement exits through nozzle outlets as described in claim 11 are arranged.

Nachstehend wird die Erfindung anhand schematischer Darstellungen zu einem Ausführungsbeispiel näher erläutert. Es zeigen:

Fig. 1
eine Vorrichtung zum Vereinzeln von Blechen eines Blechstapels u.a. mit einem Tragsaugerrahmen, einem Trennsaugerrahmen, einem Blechdickenmessgerät sowie einer Trenndüsenanordnung in der Draufsicht auf den Blechstapel,
Fig. 2
den Trennsaugerrahmen nach Fig. 1 in der Draufsicht auf seine Oberseite,
Fig. 3
eine Schnittdarstellung des Trennsaugerrahmens nach Fig. 2 mit dem in Fig. 2 durch die Linie III-III angedeuteten Schnittverlauf,
Fig. 4
eine Schnittdarstellung des Trennsaugerrahmens nach Fig. 2 mit dem in Fig. 2 durch die Linie IV-IV angedeuteten Schnittverlauf,
Fig. 5
eine Schnittdarstellung der Vorrichtung nach Fig. 1 mit dem in Fig. 1 durch die Linie V-V angedeuteten Schnittverlauf,
Fign. 6 bis 11
Fig. 5 entsprechende Schnittdarstellungen der Vorrichtung nach Fig. 1 in unterschiedlichen Betriebsphasen und
Fig. 12
die Trenndüsenanordnung nach Fig. 1 in der Draufsicht auf ihre Düsenauslässe.
The invention is explained in more detail below with reference to schematic representations of an exemplary embodiment. Show it:
Fig. 1
1 shows a device for separating sheets from a sheet stack including a support suction frame, a separating suction frame, a sheet thickness measuring device and a separating nozzle arrangement in a top view of the sheet stack,
Fig. 2
1 in top view of its top,
Fig. 3
3 shows a sectional view of the separating suction frame according to FIG. 2 with the sectional course indicated by the line III-III in FIG. 2,
Fig. 4
3 shows a sectional illustration of the separating suction frame according to FIG. 2 with the sectional profile indicated by the line IV-IV in FIG. 2,
Fig. 5
2 shows a sectional illustration of the device according to FIG. 1 with the sectional profile indicated by the line VV in FIG. 1,
FIGS. 6 to 11
Fig. 5 corresponding sectional views of the device of FIG. 1 in different operating phases and
Fig. 12
1 in the top view of its nozzle outlets.

Ausweislich der Fign. 1 und 5 umfasst eine Vorrichtung 1 zum Vereinzeln von Blechen 2 eines Blechstapels 3 eine als Tragsaugerrahmen 4 ausgebildete Tragstruktur für Tragsauger 5 sowie eine als Trennsaugerrahmen 6 ausgebildete Tragstruktur für Trennsauger 7. Der Trennsaugerrahmen 6 ist dabei an dem Tragsaugerrahmen 4 um eine horizontale Achse 8 schwenkbar gelagert. Über dem Trennsaugerrahmen 6 ist eine Trenndüsenanordnung 9 auf dem Tragsaugerrahmen 4 um eine horizontale Achse 10 schwenkbar abgestützt. Der Trenndüsenanordnung 9 gegenüberliegend lagert der Tragsaugerrahmen 4 ein Blechdickenmessgerät 11. Auch dieses ist um eine horizontale Achse schwenkbar. Dieser Achse ist in Fig. 1 das Bezugszeichen "12" zugeordnet. Führungsarme 13 sind um eine Achse 14 schwenkbar an dem Tragsaugerrahmen 4 angelenkt. According to the fig. 1 and 5 comprises a device 1 for Separating sheets 2 of a stack 3 of sheets as a support frame 4 trained support structure for vacuum 5 and a support structure designed as a separating suction frame 6 for Separating suction device 7. The separating suction device frame 6 is on the support suction device frame 4 pivotally mounted about a horizontal axis 8. A separating nozzle arrangement 9 is located above the separating suction frame 6 the support frame 4 pivotable about a horizontal axis 10 supported. The separating nozzle arrangement 9 is located opposite the support frame 4 a sheet thickness measuring device 11. This too can be swiveled around a horizontal axis. This axis is in Fig. 1 assigned the reference numeral "12". Guide arms 13 are pivoted about an axis 14 on the support frame 4.

Relativ zu dem Blechstapel 3 ist der Tragsaugerrahmen 4 in den drei Koordinatenrichtungen x, y, z des Raumes rechnergesteuert verfahrbar. An seiner dem Blechstapel 3 zugewandten Unterseite weist der Tragsaugerrahmen 4 eine Mehrzahl der herkömmlichen Tragsauger 5 auf, die über nicht dargestellte Pneumatikleitungen mit einer ebenfalls nicht gezeigten pneumatischen Druckquelle in Verbindung stehen. Wie üblich besitzen die Tragsauger 5 einen Tragsaugergrundkörper 16 sowie eine daran gehaltene und aus Gummi gefertigte Tragsaugermanschette 17, die ihrerseits an der dem Blechstapel 3 zugewandten Seite eine ringförmige Anlagefläche 18 ausbildet. Die gegenseitigen Abstände der Tragsauger 5 sind ebenso wie die Abmessungen des Tragsaugerrahmens 4 in Abhängigkeit von der Größe der Bleche 2 gewählt.Relative to the sheet metal stack 3, the support frame 4 is in the three coordinate directions x, y, z of the room computer controlled traversable. On its underside facing the sheet metal stack 3 the suction frame 4 has a plurality of the conventional ones Carrier suction 5 on the pneumatic lines, not shown with a pneumatic pressure source, also not shown stay in contact. As usual, the suction cups have 5 a suction base 16 and a held thereon Rubber suction cup 17, which in turn an annular contact surface on the side facing the sheet metal stack 3 18 trains. The mutual spacing of the suction cups 5 are just like the dimensions of the suction frame 4 depending on the size of the sheets 2 selected.

Der Blechstapel 3 ruht auf einer Werkstückunterlage 19. Dabei sind die einzelnen Bleche 2 des Blechstapels 3 mittels Positionieranschlägen 20 seitlich abgestützt und dabei horizontal definiert ausgerichtet.The sheet metal stack 3 rests on a workpiece support 19 are the individual sheets 2 of the sheet stack 3 by means of positioning stops 20 laterally supported and defined horizontally aligned.

Gemäß den Fign. 1 und 5 ist der Trennsaugerrahmen 6 an der einem Längsrand der Bleche 2 zugewandten Seite der Tragsauger 5 angeordnet. Wie aus Fig. 2 hervorgeht, trägt der Trennsaugerrahmen 6 an seiner Unterseite ein Trennsaugerfeld mit einer Mehrzahl von Trennsaugern 7, die teils als randseitige Trennsauger 7a an der dem zugeordneten Längsrand der Bleche 2 zugewandten Seite des Trennsaugerrahmens 6 und teils als innenliegende Trennsauger 7b an der von dem genannten Längsrand der Bleche 2 abgewandten Seite der randseitigen Trennsauger 7a vorgesehen sind. Die innenliegenden Trennsauger 7b liegen dabei zwischen Werkstückanschlägen 21. Die gedachte Verbindungslinie der innenliegenden Trennsauger 7b und der Werkstückanschläge 21 verläuft parallel zu dem den Trennsaugern 7 zugeordneten Längsrand der Bleche 2. Auch die Trennsauger 7 stehen über nicht gezeigte Pneumatikleitungen mit der pneumatischen Druckquelle der Vorrichtung 1 in Verbindung.According to FIGS. 1 and 5 is the separating suction frame 6 on one Longitudinal edge of the sheets 2 facing side of the suction cup 5 arranged. As is apparent from Fig. 2, the separating suction frame carries 6 on its underside a separating suction pad with a A plurality of separating suction devices 7, some of which serve as an edge-side separating suction device 7a on the associated longitudinal edge of the sheets 2 Side of the suction cup frame 6 and partly as an internal one Vacuum cleaner 7b on the from the said longitudinal edge Sheets 2 facing away from the edge-side separating suction 7a provided are. The internal suction cups 7b are there between workpiece stops 21. The imaginary connecting line the internal separating suction device 7b and the workpiece stops 21 runs parallel to the longitudinal edge assigned to the separating suction devices 7 the metal sheets 2. The separating suction devices 7 are also not shown Pneumatic lines with the pneumatic pressure source of the Device 1 in connection.

Ausweislich der Fign. 3 und 4 besitzen die randseitigen Trennsauger 7a jeweils einen an dem Trennsaugerrahmen 6 befestigten Trennsaugergrundkörper 22 sowie eine daran gehaltene Trennsaugermanschette 23. Die innenliegenden Trennsauger 7b weisen entsprechend einen Trennsaugergrundkörper 24 sowie eine Trennsaugermanschette 25 auf. An ihrer dem Blechstapel 3 zugewandten Seite sind die Trennsaugermanschetten 23 der randseitigen Trennsauger 7a jeweils mit einer Anlagefläche 26, die Trennsaugermanschetten 25 der innenliegenden Trennsauger 7b jeweils mit einer Anlagefläche 27 versehen. Sowohl die Trennsaugermanschetten 23 der randseitigen Trennsauger 7a als auch die Trennsaugermanschetten 25 der innenliegenden Trennsauger 7b sind als gefaltete Gummibälge ausgebildet. Dabei übersteigt die Anzahl der Falten der Trennsaugermanschetten 23 an den randseitigen Trennsaugern 7a die Anzahl der Falten der Trennsaugermanschetten 25 an den innenliegenden Trennsaugern 7b. Die Anlageflächen 26, 27 der randseitigen Trennsauger 7a und der innenliegenden Trennsauger 7b liegen bei deren Ausgangszustand in einer gemeinsamen Ebene. Gegenüber den freien Enden der Werkstückanschläge 21 sind die genannten Anlageflächen 26, 27 in Ausgangslage zu dem Blechstapel 3 hin vorgesetzt. Mittels eines nicht gezeigten Schwenkantriebes ist der Trennsaugerrahmen 6 mit den daran angebrachten Trennsaugern 7 und den Werkstückanschlägen 21 um die Achse 8 drehbar. Der genannte Schwenkantrieb wird ebenso wie alle übrigen Funktionen der Vorrichtung 1 von einer Rechnersteuerung numerisch gesteuert.According to the fig. 3 and 4 have the separating suction device on the edge 7a each have one attached to the separating suction frame 6 Vacuum cleaner base body 22 and a vacuum cleaner collar held thereon 23. The internal separating suction cups 7b point accordingly a separating suction base 24 and a separating suction collar 25 on. On her facing the sheet stack 3 Side are the suction cups 23 of the edge Vacuum cleaner 7a each with a contact surface 26, the vacuum cleaner sleeves 25 of the internal separating suction cups 7b each with provided a contact surface 27. Both the suction cups 23 of the edge-side separating suction cups 7a as well as the separating suction cups 25 of the internal suction cups 7b are as folded bellows formed. The number exceeds the folds of the separating suction sleeves 23 on the edges Suction cups 7a the number of folds of the suction cups 25 on the internal suction cups 7b. The investment areas 26, 27 of the edge-side separating suction device 7a and the inner one Vacuum cleaners 7b are in a common state in their initial state Level. Opposite the free ends of the workpiece stops 21 are the mentioned contact surfaces 26, 27 in the starting position advanced to the sheet stack 3. Not by one The swivel drive shown is the separating suction frame 6 with the attached suction cups 7 and the workpiece stops 21 rotatable about the axis 8. The swivel drive is called just like all other functions of the device 1 by one Computer control numerically controlled.

Die Vorrichtung 1 ist Bestandteil einer umfassenden Anlage zur Bearbeitung der Bleche 2 und dabei einer herkömmlichen Blechbearbeitungsmaschine im Ablauf vorgeschaltet. Die Rechnersteuerung der Vorrichtung 1 ist in die CNC-Steuerung der Gesamtanlage integriert.The device 1 is part of a comprehensive system for Processing of the sheets 2 and thereby a conventional sheet metal processing machine upstream in the process. The computer control the device 1 is in the CNC control of the entire system integrated.

In Fig. 5 ist die Vorrichtung 1 im Ausgangszustand gezeigt. Sie liegt dabei mit Abstand oberhalb des Blechstapels 3. Der Trennsaugerrahmen 6 ist leicht geneigt und dabei mit seinem freien Ende gegen die Horizontale nach oben verschwenkt. Der Einfachheit halber ist in Fig. 5 sowie den nachfolgenden Fign. 6 bis 11 nur ein Teil der an dem Trennsaugerrahmen 6 vorgesehenen Trennsauger 7 gezeigt. Die Anlageflächen 26 der an dem Trennsaugerrahmen 6 angebrachten randseitigen Trennsauger 7a sowie die Anlageflächen 27 der innenliegenden Trennsauger 7b liegen in einer gemeinsamen, entsprechend der Neigung des Trennsaugerrahmens 6 verlaufenden Ebene und sind dabei den freien Enden der Werkstückanschläge 21 zu dem Blechstapel 3 hin vorgelagert. Dem Blechstapel 3 näher als die Anlageflächen 26, 27 der randseitigen Trennsauger 7a und der innenliegenden Trennsauger 7b liegen die Anlageflächen 18 der Tragsauger 5. Die Trenndüsenanordnung 9 und das Blechdickenmessgerät 11 sind auf die von dem Blechstapel 3 abgewandte Seite des Tragsaugerrahmens 4 geschwenkt und nehmen dort ihre Ruhestellung ein. Ebenfalls in der Ruhestellung befinden sich die Führungsarme 13, die sich horizontal entlang dem Tragsaugerrahmen 4 erstrecken. Dem in dem Blechstapel 3 anfangs zuäußerst liegenden der Bleche 2 ist in den Fign. 5 bis 11 das Bezugszeichen "2a", dem darunter liegenden das Bezugszeichen "2b" zugeordnet.5 shows the device 1 in the initial state. she lies at a distance above the sheet stack 3. The separating suction frame 6 is slightly inclined and with its free End pivoted upwards against the horizontal. The simplicity for the sake of that is in Fig. 5 and the following Figs. 6 to 11 only a part of that provided on the separating suction frame 6 Vacuum cleaner 7 shown. The contact surfaces 26 of the suction cup frame 6 attached edge separating suction 7a as well the contact surfaces 27 of the internal suction cups 7b are located in a common, according to the inclination of the vacuum cleaner frame 6 level and are the free ends the workpiece stops 21 upstream of the sheet stack 3. Closer to the sheet metal stack 3 than the contact surfaces 26, 27 of the edge Separating suction 7a and the internal separating suction 7b are the contact surfaces 18 of the suction cups 5. The separating nozzle arrangement 9 and the sheet thickness measuring device 11 are based on those of the side of the support frame 4 pivoted away from the sheet stack 3 and take their rest position there. Also in the rest position are the guide arms 13, which are extend horizontally along the support frame 4. The in the sheet metal stack 3 is initially the sheet metal 2 lying outermost in the figures 5 to 11 the reference symbol "2a", the one below are assigned the reference symbol "2b".

Soll nun das Blech 2a des Blechstapels 3 aufgenommen werden, so wird die Vorrichtung 1 ausgehend von ihrer Position nach Fig. 5 in z-Richtung auf den Blechstapel 3 abgesenkt. Dabei werden die Tragsauger 5 mit ihren Anlageflächen 18 an die ihnen zugewandte Oberfläche des in dem Blechstapel 3 zuäußerst liegenden Blechs 2a angelegt. Der Trennsaugerrahmen 6 nimmt nach wie vor seine Ausgangslage gemäß Fig. 5 ein. Die Anlageflächen 26, 27 der randseitigen Trennsauger 7a bzw. der innenliegenden Trennsauger 7b sind dementsprechend von dem durch die Tragsauger 5 beaufschlagten Blech 2a geringfügig beabstandet. Durch entsprechende Ansteuerung der pneumatischen Druckquelle mittels der Rechnersteuerung der Vorrichtung 1 wird dann ein Unterdruck an die Tragsauger 5 angelegt. Diese saugen sich infolgedessen an dem Blech 2a fest. Ein Kontakt zwischen dem Blech 2a und den randseitigen Trennsaugern 7a sowie den innenliegenden Trennsaugern 7b an dem Trennsaugerrahmen 6 ist nach wie vor nicht hergestellt. Alles in allem ergeben sich die in Fig. 6 veranschaulichten Verhältnisse.If the sheet 2a of the sheet stack 3 is now to be picked up, so the device 1 is based on its position according to FIG. 5 lowered in the z-direction onto the sheet stack 3. The Carrier suction 5 with their contact surfaces 18 facing them Surface of the sheet lying outermost in the sheet stack 3 2a created. The separating suction frame 6 still takes its Starting position according to FIG. 5. The contact surfaces 26, 27 of the separating suction device 7a on the edge or the internal separating suction device 7b are accordingly those of the load applied by the suction cups 5 Sheet 2a slightly spaced. By appropriate Control of the pneumatic pressure source by means of the computer control the device 1 is then a vacuum to the Carrier suction 5 created. As a result, these suck on the Sheet 2a fixed. A contact between the sheet 2a and the edge Vacuum cleaners 7a and the internal vacuum cleaners 7b on the separating suction frame 6 is still not manufactured. All in all, the ones illustrated in FIG. 6 result Conditions.

Mit dem angesaugten Blech 2a wird dann die Vorrichtung 1 in z-Richtung angehoben. Anschließend wird das Blechdickenmessgerät 11 aus seiner Ruhestellung gemäß den Fign. 5 und 6 um die Achse 12 in seine Funktionsstellung geschwenkt, in welcher der Messkopf des herkömmlichen Blechdickenmessgerätes 11 auf Höhe des von den Tragsaugern 5 gehaltenen Blechs 2a angeordnet ist. Der Trennsaugerrahmen 6 sowie die Trenndüsenanordnung 9 und die Führungsarme 13 befinden sich nach wie vor in ihrer Ausgangsstellung.With the sheet 2a sucked in, the device 1 in FIG z direction raised. Then the sheet thickness gauge 11 from its rest position according to FIGS. 5 and 6 around Axis 12 pivoted into its functional position, in which the Measuring head of the conventional sheet thickness measuring device 11 at height of the sheet 2a held by the suction cups 5 is arranged. The separating suction frame 6 and the separating nozzle arrangement 9 and the Guide arms 13 are still in their starting position.

Mittels des Blechdickenmessgerätes 11 wird überprüft, ob die Vorrichtung 1 wie gewünscht nur das Blech 2a oder versehentlich mehrere Bleche 2 von dem Blechstapel 3 abgehoben hat. Gemäß Fig. 7 wird dabei in dem gezeigten Beispielsfall festgestellt, dass an dem von den Tragsaugern 5 gehaltenen und zuvor in dem Blechstapel 3 zuäußerst angeordneten Blech 2a unerwünschterweise das Blech 2b haftet. The sheet thickness measuring device 11 is used to check whether the Device 1 as desired only the sheet 2a or accidentally has lifted several sheets 2 from the sheet stack 3. According to 7 is determined in the example shown, that on the held by the suction cups 5 and previously in the Sheet stack 3 of the most arranged sheet 2a undesirably the sheet 2b adheres.

Aufgrund des mit dem Blechdickenmessgerät 11 erzielten Messergebnisses werden die Führungsarme 13 von der Rechnersteuerung der Vorrichtung 1 gesteuert aus ihrer horizontalen Ruhe- in ihre vertikale Funktionsstellung geschwenkt. Zeitgleich damit wird der Trennsaugerrahmen 6 um die Achse 8 aus seiner Ausgangsposition abgesenkt. Die randseitigen Trennsauger 7a sowie die innenliegenden Trennsauger 7b kommen dabei mit ihren Anlageflächen 26, 27 auf der ihnen zugewandten Oberfläche des Blechs 2a zu liegen. Die Trenndüsenanordnung 9 nimmt nach wie vor ihre Ruhestellung ein. Ebenfalls in der Ruhestellung befindet sich das wieder nach oben geschwenkte Blechdickenmessgerät 11 (Fig. 8).Because of the measurement result obtained with the sheet thickness measuring device 11 the guide arms 13 from the computer control the device 1 controlled from their horizontal rest in their vertical functional position swiveled. At the same time is the separating suction frame 6 about the axis 8 from its starting position lowered. The edge-side separating suction 7a as well the internal suction cups 7b come with their contact surfaces 26, 27 on the surface of the Sheet 2a to lie. The separation nozzle arrangement 9 continues to decrease before their rest position. Also in the rest position the plate thickness measuring device swung up again 11 (Fig. 8).

Bei nach wie vor geringfügig gegen die Horizontale nach unten verschwenktem Trennsaugerrahmen 6 wird durch Ansteuern der pneumatischen Druckquelle der Vorrichtung 1 an die randseitigen Trennsauger 7a sowie die innenliegenden Trennsauger 7b ein Unterdruck angelegt. Unter der Wirkung dieses Unterdruckes werden die Trennsaugermanschetten 23 der randseitigen Trennsauger 7a sowie die Trennsaugermanschetten 25 der innenliegenden Trennsauger 7b gestaucht. Infolgedessen werden die an der Vorrichtung 1 haftenden Bleche 2a, 2b an ihrem den Trennsaugern 7 zugeordneten Längsrand gegen die Werkstückanschläge 21 gezogen. Auf einem Niveau mit den freien Enden der Werkstückanschläge 21 sind nun die Anlageflächen 27 an den innenliegenden Trennsaugern 7b angeordnet. Still slightly downwards against the horizontal pivoted separating suction frame 6 is activated by the pneumatic pressure source of the device 1 to the edge Vacuum cleaners 7a and the internal vacuum cleaners 7b a negative pressure created. Under the action of this vacuum the suction cups 23 of the edge suction 7a as well as the separating suction cups 25 of the internal separating suction 7b compressed. As a result, those on the device 1 adhering sheets 2a, 2b on their assigned to the suction cups 7 Longitudinal edge drawn against the workpiece stops 21. On a level with the free ends of the workpiece stops 21 are now the contact surfaces 27 on the internal suction cups 7b arranged.

Die Trennsaugermanschetten 23 der randseitigen Trennsauger 7a werden unter der Wirkung des anliegenden Unterdruckes stärker gestaucht als die Trennsaugermanschetten 25 an den innenliegenden Trennsaugern 7b. Dementsprechend sind die an der gegenüberliegenden Oberfläche des Blechs 2a anliegenden Anlageflächen 26 der randseitigen Trennsauger 7a in Querrichtung der genannten Blechoberfläche gegenüber den freien Enden der Werkstückanschläge 21 und den Anlageflächen 27 der innenliegenden Trennsauger 7b zurückgesetzt. Die beiden aneinander haftenden Bleche 2a, 2b werden infolgedessen an ihrem den Trennsaugern 7 zugeordneten Längsrand um eine mittels der Werkstückanschläge 21 sowie der innenliegenden Trennsauger 7b definierte Achse zu der Seite der Blechbeaufschlagung durch die Tragsauger 5 sowie die Trennsauger 7, d.h. zu der Seite der Vorrichtung 1 hin gebogen. Unter der Wirkung seiner Eigenelastizität ist das an dem von den Tragsaugern 5 sowie den Trennsaugern 7 unmittelbar beaufschlagten Blech 2a anhaftende Blech 2b bestrebt, selbsttätig seine ebene Form wiederherzustellen. Aufgrund der an ihm wirkenden elastischen Rückstellkräfte beginnt das Blech 2b, sich ausgehend von seinem den Trennsaugern 7 zugeordneten Längsrand von dem Blech 2a zu lösen. Es ergeben sich so die in Fig. 9 dargestellten Verhältnisse.The suction cups 23 of the edge suction 7a become stronger under the effect of the applied negative pressure compressed as the separating suction cups 25 on the inside Separating suction cups 7b. Accordingly, those on the opposite Surface of the sheet 2a abutting contact surfaces 26th the edge-side separating suction 7a in the transverse direction of the above Sheet metal surface opposite the free ends of the workpiece stops 21 and the contact surfaces 27 of the internal separating suction 7b reset. The two sheets clinging together 2a, 2b are consequently associated with the separating suction devices 7 on their Longitudinal edge around a by means of the workpiece stops 21st and the internal separating suction device 7b defined axis to the Side of the sheet loading by the suction cup 5 and the Separating suction 7, i.e. bent towards the side of the device 1. Under the effect of its own elasticity, this is the same as that of the suction cups 5 and the separating suction cups 7 acted directly on Sheet 2a adhering sheet 2b strives, automatically to restore its flat shape. Because of the effect on it the elastic restoring forces the sheet 2b begins starting from its longitudinal edge assigned to the separating suction devices 7 to be detached from the sheet 2a. The result is that in FIG. 9 shown relationships.

Unterstützt wird die selbsttätig eingeleitete Trennung der beiden Bleche 2a, 2b durch Schwenken des Trennsaugerrahmens 6 aus der Position gemäß Fig. 9 in seine Ausgangsposition gemäß Fig. 10. Die randseitigen Trennsauger 7a sowie die innenliegenden Trennsauger 7b sind dabei nach wie vor unter der Wirkung des an ihnen angelegten Unterdruckes gestaucht. Das Blech 2a ist nach wie vor an die Werkstückanschläge 21 herangezogen.The automatically initiated separation of the two is supported Sheets 2a, 2b by pivoting the separating suction frame 6 9 into its starting position according to FIG. 10. The edge-side separating suction 7a and the inside Vacuum cleaners 7b are still under the effect of vacuum applied to them. The sheet 2a is after as before used on the workpiece stops 21.

Infolge der beschriebenen Schwenkbewegung des Trennsaugerrahmens 6 verstärkt sich die Biegung des an der Vorrichtung 1 gehaltenen "Doppelblechs". Damit einher geht eine Vergrößerung der an dem Blech 2b wirkenden elastischen Rückstellkraft und damit eine Beschleunigung der längsrandseitigen Trennung der beiden Bleche 2a, 2b.As a result of the described pivoting movement of the vacuum cleaner frame 6 increases the bending of the held on the device 1 "Double sheet". This is accompanied by an enlargement the elastic restoring force acting on the sheet 2b and thus an acceleration of the longitudinal separation of the two sheets 2a, 2b.

In den sich an dem betreffenden Längsrand der Bleche 2a, 2b öffnenden Trennspalt wird mittels der in ihre Funktionsstellung geschwenkten Trenndüsenanordnung 9 als strömendes Druckmedium Druckluft in Richtung auf die Stirnseite des Blechrandes aufgegeben. Auch diese Druckluft unterstützt die Trennung der beiden an der Vorrichtung 1 gehaltenen Bleche 2a, 2b (Fig. 10).In the on the relevant longitudinal edge of the sheets 2a, 2b opening separating gap is in its functional position pivoted separation nozzle assembly 9 as a flowing pressure medium Compressed air in the direction of the face of the sheet metal edge. This compressed air also supports the separation of the two sheets 2a, 2b held on the device 1 (FIG. 10).

Ist die Trennspaltbildung hinreichend weit zu dem Innern der Bleche 2a, 2b hin fortgeschritten, so bewirkt die Gewichtskraft des Bleches 2b, dass sich dieses vollständig von dem oberen, unmittelbar an der Vorrichtung 1 gehaltenen Blech 2a löst. Das gelöste Blech 2b fällt dann auf den Blechstapel 3 zurück. Dabei sorgen die ihre Funktionsstellung einnehmenden Führungsarme 13 im Zusammenspiel mit den Positionieranschlägen 20 an der Werkstückunterlage 19 dafür, dass das herunterfallende Blech 2b in Übereinstimmung mit den übrigen Blechen 2 des Blechstapels 3 ausgerichtet wird (Fig. 11).Is the separation gap formation sufficiently far to the inside of the Sheets 2a, 2b advanced, so the weight of the sheet 2b so that it completely extends from the upper, Sheet 2a held directly on the device 1 releases. The loosened sheet 2b then falls back on the sheet stack 3. there provide the guide arms 13 taking their functional position in interaction with the positioning stops 20 on the workpiece base 19 for the falling sheet 2b in Correspondence with the other sheets 2 of the sheet stack 3 is aligned (Fig. 11).

Die Düsenanordnung 9 ist im Einzelnen in Fig. 12 dargestellt. Diese Abbildung zeigt die Düsenanordnung 9 in der Draufsicht auf Düsenauslässe 28, die bei Funktionsstellung der Trenndüsenanordnung 9 (Fign. 10, 11) dem betreffenden Längsrand der aneinander haftenden Bleche 2a, 2b gegenüberliegen. Ausweislich Fig. 12 sind die Düsenauslässe 28 entlang dem den Trennsaugern 7 zugeordneten Rand der Bleche 2a, 2b sowie in Querrichtung der von den Trennsaugern 7 beaufschlagten Blechoberfläche gegeneinander versetzt. Die Druckluftaufgabe an den Düsenauslässen 28 der Trenndüsenanordnung 9 erfolgt pulsierend.The nozzle arrangement 9 is shown in detail in FIG. 12. This figure shows the nozzle arrangement 9 in a top view on nozzle outlets 28, the functional position of the separating nozzle arrangement 9 (FIGS. 10, 11) the respective longitudinal edge of each other adhesive sheets 2a, 2b opposite. evidenced Fig. 12 are the nozzle outlets 28 along the separating suction 7 assigned edge of the sheets 2a, 2b and in the transverse direction of the sheet metal surface acted upon by the separating suction devices 7 against one another added. The compressed air supply at the nozzle outlets 28 the separating nozzle arrangement 9 is pulsating.

Die randseitigen Trennsauger 7a sowie die innenliegenden Trennsauger 7b werden nach dem Ablösen des an dem Blech 2a anhaftenden Bleches 2b drucklos geschaltet. Der von ihnen zuvor beaufschlagte Rand des Blechs 2a kann folglich in seine horizontale Lage zurückfedern. Nach einer Kontrollmessung mittels des Blechdickenmessgerätes 11 wird das an der Vorrichtung 1 mittels der nach wie vor unter einem Unterdruck stehenden Tragsauger 5 gehaltene Blech 2a schließlich durch entsprechendes Verfahren der Vorrichtung 1 zu einer Werkstückauflage einer der Vorrichtung 1 im Ablauf nachgeschalteten Bearbeitungsmaschine transportiert und dort abgelegt. The edge-side vacuum cleaners 7a and the internal vacuum cleaners 7b are after detaching the adhering to the sheet 2a Sheet 2b depressurized. The one they previously charged The edge of the sheet 2a can consequently be in its horizontal Spring back the situation. After a control measurement using the Sheet thickness measuring device 11 by means of the device 1 the still suction vacuum 5 finally held sheet 2a by a corresponding method of the device 1 to a workpiece support of one of the devices 1 in the downstream processing machine transported and filed there.

Abweichend von dem vorstehend beschriebenen Ablauf können die Trennsauger 7 auch bereits dann an dem Blech 2a angelegt werden, wenn dieses noch auf dem Blechstapel 3 aufliegt. In diesem Fall ist der Tragsaugerrahmen 4 aus der angehobenen Stellung gemäß Fig. 5 in die Position gemäß Fig. 6 abzusenken. Die Tragsauger 5 beaufschlagen dann die ihnen zugewandte Oberfläche des Bleches 2a, stehen aber nicht notwendigerweise schon unter einem Unterdruck. Der Trennsaugerrahmen 6 wird wie zu Fig. 8 beschrieben aus seiner Anfangsposition nach unten geschwenkt; die randseitigen Trennsauger 7a und die innenliegenden Trennsauger 7b kommen auf der Oberfläche des Blechs 2a zu liegen. Wird nun an die Trennsauger 7 ein Unterdruck angelegt, so wird das Blech 2a an seinem den Trennsaugern 7 zugeordneten Rand hochgebogen. Haftet an dem Blech 2a das Blech 2b, so wird auch letzteres randseitig elastisch verformt. Allein aufgrund dieser elastischen Verformung und der dadurch bewirkten elastischen Rückstellkräfte kann es bereits zum Ablösen des Bleches 2b von dem Blech 2a kommen. Gleichwohl können zur Unterstützung der Trennung der Bleche 2a, 2b die anhand der Fign. 10 und 11 erläuterten zusätzlichen Maßnahmen (Schwenken des Trennsaugerrahmens 6 in die Ausgangsposition, Druckluftaufgabe mittels der Trenndüsenanordnung 9) getroffen werden. Anschließend wird das nun an die Tragsauger 5 angesaugte vereinzelte Blech 2a von dem Blechstapel 3 abgehoben und die Trennsauger 7 werden drucklos geschaltet. Nach einer vorherigen Überprüfung mittels des Blechdickenmessgerätes 11 auf anhaftende Bleche 2 wird das Blech 2a schließlich der Werkstückauflage der nachgeschalteten Bearbeitungsmaschine zugeführt. Die beschriebenen Maßnahmen zur Blechtrennung am Blechstapel 3 können auch routinemäßig und somit unabhängig davon durchgeführt werden, ob an dem Blech 2a tatsächlich das Blech 2b unerwünschterweise haftet.Deviating from the procedure described above, the Separating suction cups 7 are then already applied to the sheet 2a, if this is still on the sheet stack 3. In this The case is the suction frame 4 from the raised position 5 into the position shown in FIG. 6. The suction cup 5 then act on the surface of the Sheets 2a, but are not necessarily already under one Vacuum. The separating suction frame 6 is described as for FIG. 8 swung down from its starting position; the edge-side separators 7a and the internal separators 7b come to rest on the surface of the sheet 2a. Now a vacuum is applied to the separating suction device 7, so the sheet 2a bent up at its edge assigned to the suction cups 7. If the sheet 2b adheres to the sheet 2a, the latter also becomes sticky edge elastically deformed. Just because of this elastic Deformation and the resulting elastic restoring forces it can already detach the sheet 2b from the Sheet 2a come. Nevertheless, can support the separation of the sheets 2a, 2b which are based on FIGS. 10 and 11 explained additional measures (swiveling the vacuum cleaner frame 6 in the starting position, compressed air supply by means of the separating nozzle arrangement 9) be taken. Then that is now the suction pad 5 sucked separated sheet 2a from the sheet stack 3 lifted off and the suction cups 7 are depressurized. After a previous check using the sheet thickness measuring device 11 on adhering sheets 2, sheet 2a finally the workpiece support of the downstream processing machine fed. The sheet separation measures described on the metal stack 3 can also routinely and thus regardless of whether the sheet 2a is actually the sheet 2b sticks undesirably.

Claims (11)

Vorrichtung zum Vereinzeln von flexiblen plattenartigen Werkstücken eines Stapels, insbesondere von Blechen (2) eines Blechstapels (3), mit wenigstens einem Tragsauger (5) sowie mit Trennsaugern (7), die wenigstens zum Teil gegenüber wenigstens einem Tragsauger (5) zu einem Werkstückrand hin versetzt angeordnet sind, wobei wenigstens ein Tragsauger (5) und die Trennsauger (7) an Anlageflächen (18, 26, 27) mit Unterdruck an einer Werkstückoberfläche des in dem Stapel zuäußerst liegenden Werkstücks anlegbar sind und wobei das von wenigstens einem Tragsauger (5) und den Trennsaugern (7) beaufschlagte Werkstück unter Bewegen der mit Unterdruck an dem Werkstück anliegenden Anlageflächen (26, 27) der Trennsauger (7) relativ zu der Anlagefläche (18) wenigstens eines Tragsaugers (5) um eine in Richtung des den Trennsaugern (7) zugeordneten Werkstückrandes verlaufende Achse zu der Seite der Werkstückbeaufschlagung hin biegbar ist, dadurch gekennzeichnet, dass wenigstens zwei Trennsauger (7) in Querrichtung des zugeordneten Werkstückrandes gegeneinander versetzt angeordnet sind und dass die mit Unterdruck an dem Werkstück anliegende Anlagefläche (26) des randseitigen Trennsaugers (7a) gegenüber der mit Unterdruck an dem Werkstück anliegenden Anlagefläche (27) des zu dem Werkstückinnern hin angeordneten innenliegenden Trennsaugers (7b) in Querrichtung der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche zurückgesetzt ist.Device for separating flexible plate-like workpieces from a stack, in particular sheets (2) from a stack of sheets (3), with at least one suction pad (5) and with suction pads (7), which are at least partially opposite at least one suction pad (5) to a workpiece edge are arranged offset, whereby at least one suction pad (5) and the separating suction pads (7) can be placed on contact surfaces (18, 26, 27) with negative pressure on a workpiece surface of the workpiece outermost in the stack, and at least one suction pad (5 ) and the separating suction devices (7) acted upon by moving the contact surfaces (26, 27) of the separating suction devices (7) bearing against the workpiece with negative pressure relative to the contact surface (18) of at least one suction cup (5) by one in the direction of the separating suction devices ( 7) associated workpiece edge extending axis is bendable to the side of the workpiece loading, characterized in that at least two doors suction cups (7) are arranged offset from one another in the transverse direction of the assigned workpiece edge and that the contact surface (26) of the edge-mounted separating suction device (7a) which is in contact with the vacuum with respect to the contact surface (27) which is in contact with the workpiece with negative pressure on the workpiece interior internal separating suction device (7b) is set back in the transverse direction of the workpiece surface acted upon by the separating suction devices (7). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass wenigstens ein randseitiger (7a) und wenigstens ein innenliegender Trennsauger (7b) jeweils eine an einem Trennsaugergrundkörper (22, 24) vorgesehene Trennsaugermanschette (23, 25) aufweisen, an deren dem Werkstück zugewandter Seite die Anlagefläche (26, 27) des betreffenden Trennsaugers (7) vorgesehen ist und dass die Trennsaugermanschette (23) des randseitigen Trennsaugers (7a) unter der Wirkung des angelegten Unterdrucks in Querrichtung der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche stärker stauchbar ist als die Trennsaugermanschette (25) des innenliegenden Trennsaugers (7b).Apparatus according to claim 1, characterized in that at least one edge suction device (7a) and at least one internal suction device (7b) each have a suction device collar (23, 25) provided on a suction device base body (22, 24), on the side facing the workpiece of the contact surface (26, 27) of the relevant separating suction device (7) is provided and that the separating suction cup (23) of the marginal separating suction device (7a) is more compressible than the separating suction cup under the effect of the negative pressure applied in the transverse direction of the workpiece surface acted upon by the separating suction devices (7) ( 25) of the internal vacuum cleaner (7b). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein randseitiger (7a) und wenigstens ein innenliegender Trennsauger (7b) jeweils eine gefaltete Trennsaugermanschette (23, 25) aufweisen, mit zumindest einer parallel zu der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche verlaufenden Faltenachse und dass die Anzahl der Falten an der Trennsaugermanschette (23) des randseitigen Trennsaugers (7a) größer ist als die Anzahl der Falten an der Trennsaugermanschette (25) des innenliegenden Trennsaugers (7b). Device according to one of the preceding claims, characterized in that at least one edge-side (7a) and at least one internal vacuum cleaner (7b) each have a folded vacuum cleaner collar (23, 25) with at least one workpiece surface which is acted upon by the vacuum cleaners (7) running fold axis and that the number of folds on the separating suction cup (23) of the peripheral suction cup (7a) is greater than the number of folds on the separating suction cup (25) of the internal suction cup (7b). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an der Seite der Werkstückbeaufschlagung wenigstens ein innenliegender Trennsauger (7b) und wenigstens ein Werkstückanschlag (21) auf einer gedachten, parallel zu dem den Trennsaugern (7) zugeordneten Werkstückrand verlaufenden Verbindungslinie mit Abstand voneinander angeordnet sind und dass das Werkstück bei mit Unterdruck an ihm angelegten Trennsaugern (7) an dem oder den Werkstückanschlägen (21) in Querrichtung der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche abgestützt ist.Device according to one of the preceding claims, characterized in that on the side of the workpiece loading at least one internal separating suction device (7b) and at least one workpiece stop (21) are arranged at a distance from one another on an imaginary connecting line running parallel to the workpiece edge assigned to the separating suction devices (7) and that the workpiece is supported on the one or more workpiece stops (21) in the transverse direction of the workpiece surface acted upon by the separating suction devices (7) when vacuum suction devices (7) are applied to it. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Trennsauger (7) entkoppelt von wenigstens einem Tragsauger (5) an dem in dem Stapel zuäußerst liegenden Werkstück anlegbar ist.Device according to one of the preceding claims, characterized in that at least one separating suction device (7), decoupled from at least one carrying suction device (5), can be placed on the workpiece lying outermost in the stack. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Trennsauger (7) an einer Tragstruktur (6) gehalten ist, die relativ zu einer wenigstens einen Tragsauger (5) lagernden Tragstruktur (4) beweglich ist. Device according to one of the preceding claims, characterized in that at least one separating suction device (7) is held on a support structure (6) which is movable relative to a support structure (4) supporting at least one support suction device (5). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tragstruktur (6) für wenigstens einen Trennsauger (7) relativ zu der Tragstruktur (4) für wenigstens einen Tragsauger (5) schwenkbar ist.Device according to one of the preceding claims, characterized in that the support structure (6) for at least one vacuum cleaner (7) can be pivoted relative to the support structure (4) for at least one vacuum cleaner (5). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tragstruktur (6) für wenigstens einen Trennsauger (7) relativ zu der Tragstruktur (4) für wenigstens einen Tragsauger (5) um eine Achse (8) schwenkbar ist, die parallel zu der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche in Richtung des den Trennsaugern (7) zugeordneten Werkstückrandes verläuft.Device according to one of the preceding claims, characterized in that the support structure (6) for at least one vacuum cleaner (7) relative to the support structure (4) for at least one vacuum cleaner (5) is pivotable about an axis (8) which is parallel to the workpiece surface loaded by the separating suction devices (7) runs in the direction of the workpiece edge assigned to the separating suction devices (7). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens eine Trenndüsenanordnung (9) vorgesehen ist, mittels derer bei mit Unterdruck an dem Werkstück angelegten Trennsaugern (7) ein strömendes Druckmedium in Richtung auf die Stirnseite des den Trennsaugern (7) zugeordneten Werkstückrandes aufgebbar ist.Device according to one of the preceding claims, characterized in that at least one separating nozzle arrangement (9) is provided, by means of which a flowing pressure medium can be applied in the direction of the end face of the workpiece edge assigned to the separating suction devices (7) when the suction cups (7) are under vacuum is. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das strömende Druckmedium mittels der Trenndüsenanordnung (9) pulsierend aufgebbar ist. Device according to one of the preceding claims, characterized in that the flowing pressure medium can be applied in a pulsating manner by means of the separating nozzle arrangement (9). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Trenndüsenanordnung (9) mehrere Düsenauslässe (28) für das strömende Druckmedium aufweist, die entlang dem den Trennsaugern (7) zugeordneten Werkstückrand und in Querrichtung der von den Trennsaugern (7) beaufschlagten Werkstückoberfläche gegeneinander versetzt angeordnet sind.Device according to one of the preceding claims, characterized in that the separating nozzle arrangement (9) has a plurality of nozzle outlets (28) for the flowing pressure medium, which run against one another along the workpiece edge assigned to the separating suction devices (7) and in the transverse direction of the workpiece surface acted upon by the separating suction devices (7) are staggered.
EP00126628A 2000-12-04 2000-12-04 Device for separating flexible plate-like workpieces from a stack, in particular metal sheets Expired - Lifetime EP1215148B1 (en)

Priority Applications (5)

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DE50009373T DE50009373D1 (en) 2000-12-04 2000-12-04 Device for separating flexible plate-like workpieces of a stack, in particular sheets of a stack of sheets
AT00126628T ATE287849T1 (en) 2000-12-04 2000-12-04 DEVICE FOR SEPARATING FLEXIBLE PLATE-LIKE WORKPIECES OF A STACK, IN PARTICULAR SHEETS OF A STACK OF SHEET METAL
EP00126628A EP1215148B1 (en) 2000-12-04 2000-12-04 Device for separating flexible plate-like workpieces from a stack, in particular metal sheets
US10/005,576 US6886827B2 (en) 2000-12-04 2001-12-04 Lifter and separator for stacked flexible flat workpieces
JP2001370507A JP3857117B2 (en) 2000-12-04 2001-12-04 Equipment for individualizing plate-like flexible workpieces in piles

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EP00126628A EP1215148B1 (en) 2000-12-04 2000-12-04 Device for separating flexible plate-like workpieces from a stack, in particular metal sheets

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EP1215148A1 true EP1215148A1 (en) 2002-06-19
EP1215148B1 EP1215148B1 (en) 2005-01-26

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DE102005009734B4 (en) * 2004-03-19 2016-10-13 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Machine handling device, sucker arrangement for this and suction units of a suction arrangement
EP1582487A1 (en) * 2004-03-29 2005-10-05 Heidelberger Druckmaschinen Aktiengesellschaft Device for separating of printing plates
EP1864922A2 (en) * 2006-05-18 2007-12-12 ILLIG Maschinenbau GmbH & Co. KG Method for removing the top plastic board from a stack and device for removing the top plastic board
EP1864922A3 (en) * 2006-05-18 2008-11-26 ILLIG Maschinenbau GmbH & Co. KG Method for removing the top plastic board from a stack and device for removing the top plastic board
EP2149521A1 (en) * 2008-07-29 2010-02-03 Voith Patent GmbH Device and method for lifting a front cover from a stack of front covers
EP2476637A2 (en) 2011-01-18 2012-07-18 Krones AG Device and method for placing, holding and/or handling flat objects
DE102012200535A1 (en) 2011-01-18 2012-07-19 Krones Ag Device and method for receiving, holding and / or handling of flat objects
US8690149B2 (en) 2011-01-18 2014-04-08 Krones Ag Device and method for receiving, holding and/or handling two-dimensional objects
EP3037371A1 (en) 2014-12-16 2016-06-29 Krones Aktiengesellschaft Device and method for placing, holding and/or handling flat objects
DE102014225981A1 (en) 2014-12-16 2016-06-16 Krones Aktiengesellschaft Device and method for receiving, holding and / or handling of flat objects
DE102018116130A1 (en) * 2018-07-04 2020-01-09 Krones Aktiengesellschaft Device and method for unpacking articles
AT521771B1 (en) * 2018-09-20 2020-05-15 Trumpf Maschinen Austria Gmbh & Co Kg Vacuum gripper, feed unit and method for transporting flat components
AT521771A4 (en) * 2018-09-20 2020-05-15 Trumpf Maschinen Austria Gmbh & Co Kg Vacuum gripper, feed unit and method for transporting flat components
US11919152B2 (en) 2018-09-20 2024-03-05 Trumpf Maschinen Austria Gmbh & Co. Kg. Vacuum gripper, feed unit, and method for conveying flat components
DE102020125588A1 (en) 2020-09-30 2022-03-31 Trumpf Sachsen Gmbh Device for separating plate-like workpieces from a stack of workpieces, automation device for a machine tool and machine tool
DE102020125588B4 (en) 2020-09-30 2022-12-08 Trumpf Sachsen Gmbh Device for separating plate-like workpieces from a stack of workpieces, automation device for a machine tool and machine tool

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US6886827B2 (en) 2005-05-03
US20020096815A1 (en) 2002-07-25
ATE287849T1 (en) 2005-02-15
JP3857117B2 (en) 2006-12-13
JP2002193463A (en) 2002-07-10
EP1215148B1 (en) 2005-01-26

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