EP0543198B1 - Supporting-and transforming-station between the presses in a transfer press line - Google Patents

Supporting-and transforming-station between the presses in a transfer press line Download PDF

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Publication number
EP0543198B1
EP0543198B1 EP92118665A EP92118665A EP0543198B1 EP 0543198 B1 EP0543198 B1 EP 0543198B1 EP 92118665 A EP92118665 A EP 92118665A EP 92118665 A EP92118665 A EP 92118665A EP 0543198 B1 EP0543198 B1 EP 0543198B1
Authority
EP
European Patent Office
Prior art keywords
deposit
station
parts
retooling
templates
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.)
Expired - Lifetime
Application number
EP92118665A
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German (de)
French (fr)
Other versions
EP0543198A1 (en
Inventor
Uwe Darr
Wolfgang Hartung
Steffen Schmidt
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.)
Umformtechnik Erfurt GmbH
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Umformtechnik Erfurt 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 Umformtechnik Erfurt GmbH filed Critical Umformtechnik Erfurt GmbH
Publication of EP0543198A1 publication Critical patent/EP0543198A1/en
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/057—Devices for exchanging transfer bars or grippers; Idle stages, e.g. exchangeable

Definitions

  • the invention relates to a storage and retrofitting station between the tool stages of a transfer press line, which serves to temporarily store the sheet metal parts in order to bridge the distance between the empty stages, to change the position of the sheet metal parts between the tool stages and to convert the part-specific storage templates and the interchangeable parts of the transfer device.
  • each station is equipped with further actuators for changing the position of the sheet metal parts in several degrees of freedom.
  • the invention is based on the problem of designing a storage and retrofitting station according to the preamble of claim 1 more cost-effectively by providing the function-determining parts for changing the position of the sheet metal parts in several degrees of freedom, including hardware and software expenditure for drive control of the actuators, only once for each idle level and remain in the empty position when changing tools.
  • the transfer press line consists of several individual presses set up one after the other in the parts transport direction, which are connected to each other in the press table area by means of clamping bolts and are operatively connected to a common drive by means of a continuous drive shaft.
  • An empty stage is provided between each tool stage, in which a storage and conversion station is located.
  • Each press is assigned separate press stands 11, the width and position of which on the press tables 12 is selected so that there is a space 24 between the press stands 11 of adjacent presses.
  • the transfer press line is equipped with a 2-dimensional or 3-dimensional transfer device, on the carrier rails 1 of which are interchangeable along the direction of parts transport, interchangeable part-specific receiving elements are fastened.
  • Suction cross members 2 are preferably provided as receiving elements, which temporarily store the sheet metal parts in the empty stages during transport between the tool stages on the storage templates 3 used for fixing the position.
  • the storage templates 3 are made in several parts.
  • a plurality of template elements are preferably attached to a common template carrier 4. If the outer template elements protrude into the press stand in the operating state, as shown in FIG. 1, a horizontal shift towards the center of the free space is required during the changeover process.
  • the template carrier 4 are each arranged on the outer ends of the pivotably mounted double lever 6.
  • a sliding block 7 is slidably mounted in a sliding block guide.
  • the pins 8 projecting through both sliding blocks 7 are operatively connected to the spindle nut 9 of a spindle drive consisting of spindle 19 and actuator 23.
  • the double lever 6 and the spindle drive are arranged on a pivoting crossbar 5 which is articulated in the pivot point 20.
  • One swivel cross member 5 is located transversely to the printing direction in the outer area of the storage and retrofitting station and is used for swiveling the sheet metal parts about the y-axis as needed for orientation in order to transport them to the next stage.
  • the position of the axis of rotation is selected so that it approximately corresponds to the axis of symmetry of the sheet metal parts in order to reduce the effort required for corrective movements due to pivoting.
  • the lifting module 17 in the z direction and the driving modules 13 and 22 in the y and x direction allow further degrees of freedom for the orientation of the sheet metal parts.
  • a change carriage 14 which can be extended transversely to the parts transport direction and serves to enclose the storage station in a U-shape when retracted, is used.
  • the change carriage 14 contains in the upper region a frame 10 which surrounds the storage station and which can be displaced vertically by means of lifting devices 18.
  • the pivoted-off template carriers 4 are taken over by a first centering and locking device 16 of the change-over carriage 14 and at the same time released from the double levers 6.
  • a second centering and locking device 21 is actuated by vertical displacement of the frame 10 to accommodate the suction traverses 2 which are in the changeover position above the storage station.
  • one of the suction cross members 2 assigned to the adjacent tool stages is uncoupled in time from the mounting rails 1 and transferred to the change carriage 14.
  • the changing carriage 14 equipped in this way with the suction traverses 2 and the storage templates 3 is then extended analogously to the sliding tables from the empty step area.
  • a second change carriage 14, already provided with new storage templates 3 and suction traverses 2 can simultaneously be driven into the empty step area from the opposite side and the conversion process can be ended in reverse order.

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

Description

Die Erfindung betrifft eine Ablage- und Umrüststation zwischen den Werkzeugstufen einer Transferpressenlinie, die zum Zwischenablegen der Blechteile zwecks Überbrückung des Abstandes der Leerstufen, zur Lageveränderung der Blechteile zwischen den Werkzeugstufen sowie zum Umrüsten der teilespezifischen Ablageschablonen und der auswechselbaren Teile der Transfereinrichtung dient.The invention relates to a storage and retrofitting station between the tool stages of a transfer press line, which serves to temporarily store the sheet metal parts in order to bridge the distance between the empty stages, to change the position of the sheet metal parts between the tool stages and to convert the part-specific storage templates and the interchangeable parts of the transfer device.

Aus der EP-A- 383 168, auf der der Oberbegriff des Anspruchs 1 basiert, ist eine Großteil-Stufenpresse mit mehreren hintereinander angeordneten Werkzeugstufen bekannt, bei welcher die Werkstücke mittels saugerbestückten Quertraversen an durch den Werkzeugraum der Presse hindurchführenden Tragschienen längs durch die Stufenpresse geführt werden. Zwischen zwei benachbarten Werkzeugstufen ist jeweils eine Zwischenablagestufe mit einer Vorrichtung zur Veränderung der Lage der Werkstücke in ein bis fünf Freiheitsgraden vorgesehen. Zum Umrüsten der Schablonenträger mit den an die Werkstückkontur angepaßten Ablageschablonen werden diese auf an den Schiebetischen befestigten Rahmen und Absteckbolzen abgesteckt und mit dem Werkzeugsatz gewechselt. Die jeweils am Schiebetisch seitlich neben dem Werkzeugsatz arretierten Ablageschablonen und Saugertraversen erfordern einen zusätzlichen Raumbedarf, der zu einer größeren Pressenständerweite in Durchlaufrichtung der Werkstücke führt.From EP-A-383 168, on which the preamble of claim 1 is based, a large-part step press with a plurality of tool stages arranged one behind the other is known, in which the workpieces are guided lengthwise through the step press by means of suction-loaded crossbars on support rails passing through the tool space of the press become. Between two adjacent tool stages there is an intermediate storage stage with a device for changing the position of the workpieces in one to five degrees of freedom. To convert the stencil supports with the storage stencils that are adapted to the workpiece contour, they are pinned onto frames and locking bolts attached to the sliding tables and replaced with the tool set. The storage templates and suction traverses, which are locked on the side of the sliding table next to the tool set, require additional space, which leads to a larger press stand width in the direction of travel of the workpieces.

Des weiteren sind in dem nach dem Anmeldetag veröffentlichten Dokument EP-A- 523478 (Art. 54(3) EPC) bereits Ablage- und Umrüststationen in Leerstufenbereichen einer Transferpressenlinie beschrieben, die zum Umrüsten durch einen Freiraum zwischen den Pressenständern benachbarter Pressen mittels separater Antriebe analog den Schiebetischen ausfahrbar sind und durch bereitstehende, bereits außerhalb der Presse auf das nächste zu bearbeitende Blechteil umgerüstete Stationen ersetzt werden.Furthermore, in the document EP-A-523478 (Art. 54 (3) EPC) published after the filing date, storage and retrofitting stations in empty stage areas of a transfer press line are already described, which are analogous to converting through a space between the press stands of adjacent presses by means of separate drives the sliding tables are extendable and are already ready for the next one outside the press processing sheet metal part converted stations are replaced.

Jede Station ist neben den Fahrantrieben mit weiteren Stellantrieben zur Veränderung der Lage der Blechteile in mehreren Freiheitsgraden ausgerüstet.In addition to the travel drives, each station is equipped with further actuators for changing the position of the sheet metal parts in several degrees of freedom.

Nachteilig wirkt sich bei dieser Lösung der erhöhte Hard- und Softwareaufwand durch die erforderliche Verdoppelung aller Stellantriebe für beide Ablage- und Umrüststationen aus.The disadvantage of this solution is the increased hardware and software expenditure due to the necessary doubling of all actuators for both filing and conversion stations.

Der Erfindung liegt das Problem zugrunde, eine Ablage- und Umrüststation nach dem Oberbegriff des Patentanspruchs 1 kostengünstiger zu gestalten, indem die funktionsbestimmenden Teile für die Lageänderung der Blechteile in mehreren Freiheitsgraden einschließlich Hard- und Softwareaufwand zur Antriebsregelung der Stellantriebe nur einmal für jede Leerstufe vorgesehen sind und beim Werkzeugwechsel in der Leerstufe verbleiben.The invention is based on the problem of designing a storage and retrofitting station according to the preamble of claim 1 more cost-effectively by providing the function-determining parts for changing the position of the sheet metal parts in several degrees of freedom, including hardware and software expenditure for drive control of the actuators, only once for each idle level and remain in the empty position when changing tools.

Erfindungsgemäß wird das durch die im Patentanspruch 1 beschriebenen Merkmale erreicht.According to the invention this is achieved by the features described in claim 1.

Die Merkmale der Ansprüche 2 bis 6 betreffen zweckmäßige Ausgestaltungen der Ablage- und Umrüststation.The features of claims 2 to 6 relate to expedient configurations of the storage and conversion station.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel näher erläutert. Die zugehörigen Zeichnungen zeigen:

Figur 1:
die Ablage- und Umrüststation in der Vorderansicht in Arbeitsposition
Figur 2:
die Ablage- und Umrüststation in der Umrüstposition.
The invention is explained in more detail below using an exemplary embodiment. The associated drawings show:
Figure 1:
the storage and conversion station in the front view in the working position
Figure 2:
the storage and changeover station in the changeover position.

Die Transferpressenlinie besteht aus mehreren in Teiletransportrichtung hintereinander aufgestellten einzelnen Pressen, die im Bereich der Pressentische mittels Spannbolzen miteinander verbunden sind sowie mittels einer durchgehenden Antriebswelle mit einem gemeinsamen Antrieb in Wirkverbindung stehen.
Zwischen jeder Werkzeugstufe ist eine Leerstufe vorgesehen, in der sich eine Ablage- und Umrüststation befindet.The transfer press line consists of several individual presses set up one after the other in the parts transport direction, which are connected to each other in the press table area by means of clamping bolts and are operatively connected to a common drive by means of a continuous drive shaft.
An empty stage is provided between each tool stage, in which a storage and conversion station is located.

Jeder Presse sind separate Pressenständer 11 zugeordnet, deren Breite und Lage auf den Pressentischen 12 so gewählt ist, daß zwischen den Pressenständern 11 benachbarter Pressen ein Freiraum 24 besteht. Zum Teiletransport ist die Transferpressenlinie mit einer 2- bzw. 3-dimensional arbeitenden Transfereinrichtung ausgestattet, an deren längs zur Teiletransportrichtung laufenden Tragschienen 1 austauschbare teilespezifische Aufnahmeelemente befestigt sind.
Als Aufnahmeelemente sind vorzugsweise Saugertraversen 2 vorgesehen, die die Blechteile beim Transport zwischen den Werkzeugstufen auf den zur Lagefixierung dienenden Ablageschablonen 3 in den Leerstufen zwischenlagern. Die Ablageschablonen 3 sind mehrteilig ausgeführt. Mehrere Schablonenelemente sind vorzugsweise auf einem gemeinsamen Schablonenträger 4 befestigt.
Ragen die äußeren Schablonenelemente im Betriebszustand in den Pressenständer hinein, wie in Figur 1 dargestellt, ist beim Umrüstvorgang eine horizontale Verlagerung in Richtung Freiraummitte erforderlich.
Dazu sind die Schablonenträger 4 jeweils auf den äußeren Enden der schwenkbar gelagerten Doppelhebel 6 angeordnet.Each press is assigned separate press stands 11, the width and position of which on the press tables 12 is selected so that there is a space 24 between the press stands 11 of adjacent presses. For the transport of parts, the transfer press line is equipped with a 2-dimensional or 3-dimensional transfer device, on the carrier rails 1 of which are interchangeable along the direction of parts transport, interchangeable part-specific receiving elements are fastened.
Suction cross members 2 are preferably provided as receiving elements, which temporarily store the sheet metal parts in the empty stages during transport between the tool stages on the storage templates 3 used for fixing the position. The storage templates 3 are made in several parts. A plurality of template elements are preferably attached to a common template carrier 4.
If the outer template elements protrude into the press stand in the operating state, as shown in FIG. 1, a horizontal shift towards the center of the free space is required during the changeover process.
For this purpose, the template carrier 4 are each arranged on the outer ends of the pivotably mounted double lever 6.

An den inneren Enden ist ein Gleitstein 7 in einer Gleitsteinführung verschiebbar gelagert. Die durch beide Gleitsteine 7 ragenden Zapfen 8 sind mit der Spindelmutter 9 eines aus Spindel 19 und Stellantrieb 23 bestehenden Spindelantriebes wirkverbunden.
Der Doppelhebel 6 und der Spindelantrieb sind auf einer im Drehpunkt 20 gelenkig gelagerten Schwenktraverse 5 angeordnet. Je eine Schwenktraverse 5 befindet sich quer zur Drucklaufrichtung im äußeren Bereich der Ablage- und Umrüststation und dient zum bedarfsweisen Schwenken der Blechteile um die y-Achse zwecks Lageorientierung vor dem Transport in die Folgestufe.
Die Lage der Drehachse ist so gewählt, daß sie annähernd mit der Symmetrieachse der Blechteile übereinstimmt, um den Aufwand für erforderliche Korrekturbewegungen infolge Schwenkens zu reduzieren. Weitere Freiheitsgrade zur Lageorientierung der Blechteile ermöglichen der Hubmodul 17 in z-Richtung und die Fahrmodule 13 und 22 in der y- und x-Richtung.
Zum Umrüsten der teilespezifischen Ablageschablonen 3 außerhalb des Pressenraumes dient ein quer zur Teilestransportrichtung aus dem Leerstufenbereich ausfahrbarer Wechselwagen 14, der die Ablagestation im eingefahrenen Zustand U-förmig umschließt. Der Wechselwagen 14 enthält im oberen Bereich einen die Ablagestation umschließenden Rahmen 10, der mittels Hubeinrichtungen 18 vertikal verschiebbar ist.
In der ersten Phase des Umrüstvorganges werden die abgeschwenkten Schablonenträger 4 von einer ersten Zentrier- und Arretiervorrichtung 16 des Wechselwagens 14 übernommen und gleichzeitig von den Doppelhebeln 6 gelöst. Anschließend wird in der zweiten Phase durch vertikale Verschiebung des Rahmens 10 eine zweite Zentrier- und Arretiervorrichtung 21 zur Aufnahme der oberhalb der Ablagestation in Umrüstposition stehenden Saugertraversen 2 betätigt.
Im dargstellten Beispiel werden zeitlich nacheinander je eine der den benachbarten Werkzeugstufen zugeordneten Saugertraversen 2 von den Tragschienen 1 abgekoppelt und dem Wechselwagen 14 übergeben. Der auf diese Weise mit den Saugertraversen 2 und den Ablageschablonen 3 ausgerüstete Wechselwagen 14 wird anschließend analog den Schiebetischen aus dem Leerstufenbereich ausgefahren.
In vorteilhafter Ausführungsform kann ein zweiter, bereits mit neuen Ablageschablonen 3 und Saugertraversen 2 versehener Wechselwagen 14 zeitgleich von der entgegengesetzten Seite in den Leerstufenbereich eingefahren und in umgekehrter Reihenfolge der Umrüstvorgang beendet werden.At the inner ends, a sliding block 7 is slidably mounted in a sliding block guide. The pins 8 projecting through both sliding blocks 7 are operatively connected to the spindle nut 9 of a spindle drive consisting of spindle 19 and actuator 23.
The double lever 6 and the spindle drive are arranged on a pivoting crossbar 5 which is articulated in the pivot point 20. One swivel cross member 5 is located transversely to the printing direction in the outer area of the storage and retrofitting station and is used for swiveling the sheet metal parts about the y-axis as needed for orientation in order to transport them to the next stage.
The position of the axis of rotation is selected so that it approximately corresponds to the axis of symmetry of the sheet metal parts in order to reduce the effort required for corrective movements due to pivoting. The lifting module 17 in the z direction and the driving modules 13 and 22 in the y and x direction allow further degrees of freedom for the orientation of the sheet metal parts.
To change over the part-specific storage templates 3 outside the press area, a change carriage 14, which can be extended transversely to the parts transport direction and serves to enclose the storage station in a U-shape when retracted, is used. The change carriage 14 contains in the upper region a frame 10 which surrounds the storage station and which can be displaced vertically by means of lifting devices 18.
In the first phase of the retrofitting process, the pivoted-off template carriers 4 are taken over by a first centering and locking device 16 of the change-over carriage 14 and at the same time released from the double levers 6. Subsequently, in the second phase, a second centering and locking device 21 is actuated by vertical displacement of the frame 10 to accommodate the suction traverses 2 which are in the changeover position above the storage station.
In the example shown, one of the suction cross members 2 assigned to the adjacent tool stages is uncoupled in time from the mounting rails 1 and transferred to the change carriage 14. The changing carriage 14 equipped in this way with the suction traverses 2 and the storage templates 3 is then extended analogously to the sliding tables from the empty step area.
In an advantageous embodiment, a second change carriage 14, already provided with new storage templates 3 and suction traverses 2, can simultaneously be driven into the empty step area from the opposite side and the conversion process can be ended in reverse order.

Claims (6)

  1. Deposit and retooling station between the tool stages of a transfer moulding press line, having exchangeable part-specific deposit templates (3) for receiving the sheet metal parts, having operating mechanism modules (13, 17, 22) for varying the position of the sheet metal parts in many degrees of freedom as well as having means of receiving the exchangeable parts of the transfer device, i.e. suction cross arms (2), suction spiders or grab arms, during tool changing,
    characterized in that
    there is associated with the station at least one, in plan view, U-shaped reciprocal carriage (14), which is extendable at right angles to the part-transporting direction out of the empty stage region and on which a frame (10) is supported so as to be vertically displaceable by means of lifting devices (18), which frame in its lowered position encloses the deposit station and is provided with centring and arresting devices for receiving the deposit templates (3) and/or the exchangeable parts of the transfer device.
  2. Deposit and retooling station according to claims 1 and 2,
    characterized in that
    the suction cross arms (2) or suction spiders during tool changing are deposited each in a horizontal position in two decks one above the other in the centring and arresting devices (21) of the frame (10).
  3. Deposit and retooling station according to claims 1 and 2,
    characterized in that
    the template carriers (4) for the deposit templates (3), to reduce the external dimensions to the size of the clearance (24) between the press posts (11), are of a two-part construction and the two parts of the template carriers (4) during tool changing are displaceable horizontally towards the middle of the deposit station.
  4. Deposit and retooling station according to claims 1 and 2,
    characterized in that
    the template carriers (4) for the deposit templates (3) are of a two-part construction and the two parts of the template carriers (4) during tool changing may be lowered by means of part-turn actuators into a vertical position.
  5. Deposit and retooling station according to claim 4,
    characterized in that
    the two parts of the template carriers (4) are disposed in each case on the outer ends of a double lever (6), which is supported so as to be capable of swivelling and in whose other ends is supported a slide block (7) associated with a slide block guide.
  6. Deposit and retooling station according to claim 5,
    characterized in that
    the slide blocks (7) of both double levers (6) are operationally connected to the spindle nut (9) of a common actuator (23).
EP92118665A 1991-11-08 1992-10-31 Supporting-and transforming-station between the presses in a transfer press line Expired - Lifetime EP0543198B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136763 1991-11-08
DE4136763A DE4136763A1 (en) 1991-11-08 1991-11-08 STORAGE AND CONVERSION STATION BETWEEN THE TOOL LEVELS OF A TRANSFER PRESS LINE

Publications (2)

Publication Number Publication Date
EP0543198A1 EP0543198A1 (en) 1993-05-26
EP0543198B1 true EP0543198B1 (en) 1995-04-12

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ID=6444342

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Application Number Title Priority Date Filing Date
EP92118665A Expired - Lifetime EP0543198B1 (en) 1991-11-08 1992-10-31 Supporting-and transforming-station between the presses in a transfer press line

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EP (1) EP0543198B1 (en)
DE (2) DE4136763A1 (en)
ES (1) ES2071405T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100512998C (en) * 2004-10-25 2009-07-15 米勒魏恩加滕股份公司 Automatic tool change device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618167C2 (en) * 1996-05-03 1998-07-02 Erfurt Umformtechnik Gmbh Storage station for sheet metal parts between two adjacent tool stages of a transfer press line
DE19651934A1 (en) * 1996-12-14 1998-06-18 Mueller Weingarten Maschf Heat press

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523478A1 (en) * 1991-07-19 1993-01-20 Umformtechnik ERFURT GmbH Transfer press line

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316815C1 (en) * 1983-05-07 1984-10-11 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Sliding table provided for the tool change in presses
DE4001590A1 (en) * 1989-02-15 1990-08-16 Mueller Weingarten Maschf Multi-stage press for pressing large workpieces - has work-table to receive workpiece between work stations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523478A1 (en) * 1991-07-19 1993-01-20 Umformtechnik ERFURT GmbH Transfer press line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100512998C (en) * 2004-10-25 2009-07-15 米勒魏恩加滕股份公司 Automatic tool change device

Also Published As

Publication number Publication date
DE59201906D1 (en) 1995-05-18
DE4136763A1 (en) 1993-05-13
ES2071405T3 (en) 1995-06-16
EP0543198A1 (en) 1993-05-26

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