EP1063028B1 - Press for external hydroforming - Google Patents

Press for external hydroforming Download PDF

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Publication number
EP1063028B1
EP1063028B1 EP00111618A EP00111618A EP1063028B1 EP 1063028 B1 EP1063028 B1 EP 1063028B1 EP 00111618 A EP00111618 A EP 00111618A EP 00111618 A EP00111618 A EP 00111618A EP 1063028 B1 EP1063028 B1 EP 1063028B1
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EP
European Patent Office
Prior art keywords
press
external
cylinder
tool
hydroforming
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EP00111618A
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German (de)
French (fr)
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EP1063028A1 (en
EP1063028B2 (en
Inventor
Joachim Beyer
Ulrich Hermann
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Mueller Weingarten AG
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Mueller Weingarten AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/205—Hydro-mechanical deep-drawing
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B21D24/08—Pneumatically or hydraulically loaded blank holders

Definitions

  • the invention relates to a press, in particular one Forming press according to the process of External high pressure forming works according to the preamble of claim 1, which is due to the proposed arrangement of the drive and forming assemblies with a small number of functional steps Forming process and which is characterized by a compact stiff design. Furthermore, a Sheet holder system with a high flexibility at low Height proposed.
  • the invention has for its object a high press Propose rigidity for external high pressure forming, which enables a reduction of the process steps at which the liquid box can be arranged stationary and which via a freely selectable and needs-based Arrangement of the plate holder cylinder has.
  • the invention is based on the idea of arranging the Fluid cylinder to choose so that by a direct location in the Power flow a rigid and compact design is guaranteed.
  • the Sheet metal holding cylinders can be used as pure short stroke cylinders be carried out.
  • These short stroke cylinders are not in one rigid system arranged, but the number and their Arrangement is according to the requirements of the Forming process optimal for the respective workpieces selectable.
  • Corresponding couplable connections to the or energy-carrying lines are provided.
  • the working cylinders carrying the tool are directly in the Integrated plunger.
  • the regulation of the back pressure takes place in stationary fluid box instead, creating a fixed Piping is enabled, which is a high pressure operation represents another advantage.
  • a favorable energy balance due to the low required Oil quantities result from the common travel cylinder for rams and sheet metal holders and the use of the Short stroke cylinder for regulating the sheet metal holding force and the Building the maximum locking force. Since the short stroke cylinder Do not travel along the forming path, but only a stroke of a few Execute millimeters results in an inexpensive design with a low overall height. This is also an advantage, though multi-point support due to the workpiece geometry is required.
  • FIG. 1 shows the basic structure of the forming press, consisting of press stand 1, ram 2, sheet holder 3, Table 4, driving cylinder 5, working cylinder 6, short-stroke cylinder 7, lock 8, tool 9, liquid box 10 and Board 11.
  • Travel cylinder 5 has plunger 2 with sheet holder 3 so far lowered that the sheet metal holder 3 touches the circuit board 11.
  • a regulated pressure build-up takes place via the short-stroke cylinder 7 for the sheet holding force depending on that Forming process.
  • the number and arrangement of the short-stroke cylinders 7 is selected depending on the tool and the board. Determinants for the tool are e.g. the Tool size and the tool contour that are on the board among other things mechanical material properties, Forming speeds and tribological processes are important.
  • Short stroke cylinders 7 can be regulated individually or in groups be united.
  • the tool is moved to its lowest position 13, which e.g. is limited by stops and is shown in FIG. 3 Retractable tool distances 12 shown locked.
  • This lock is required to keep the pressure high to complete the forming process in the liquid box 10 is built to support safely.
  • This pressure will the workpiece in a kind of calibration in the tool contour pressed and shaped.
  • Short stroke cylinder 7 generates a maximum sheet holding force that secure clamping of the board or workpiece edge guaranteed.
  • the strains caused by these forces or compression of the press components are more advantageous Way through the arrangement and stroke of the short-stroke cylinder 7th balanced.
  • Fluid couplings 16 serve to connect the each required short stroke cylinder with the Power supply.
  • a holding or tool top plate 17 is connected to the plunger 2 and allows easy Installation and removal of the working cylinder 6.
  • Figure 2 shows the situation at bottom dead center.
  • the pressure medium 14 with a maximum pressure applied in one plasticizing the final process Component geometry is formed.
  • a flow of the clamped edge of the board is with this Calibration process is undesirable and is carried out by the Short stroke cylinders 7 generated maximum locking force safely prevented.
  • the great forces that arise in this phase are by interacting with the retracted Ram locks 8 and tool distances 12 in one type closed system added.
  • the Compressibility of the fluid medium essentially in this Concept is excluded.
  • Figure 3 is a sectional view showing an arrangement of the Short stroke cylinder 7 shows. As already mentioned, both the Arrangement and number of short-stroke cylinders 7 accordingly the component is freely selectable.
  • the movable tool distances are with 12 and the associated shift cylinder with 15 designated. The tool distances are in the position shown 12 extended, i.e. the tool 9 is no longer locked.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Description

Die Erfindung betrifft eine Presse, insbesondere eine Umformpresse die nach dem Verfahren der Außenhochdruckumformung arbeitet gemäß dem Oberbegriff des Patentanspruchs 1, die aufgrund der vorgeschlagenen Anordnung der Antriebs- und Umformbaugruppen mit einer geringen Zahl von Funktionsschritten den Umformprozeß durchführt und die sich durch eine kompakte steife Bauform auszeichnet. Weiterhin wird ein Blechhaltersystem mit einer hohen Flexibilität bei geringer Bauhöhe vorgeschlagen.The invention relates to a press, in particular one Forming press according to the process of External high pressure forming works according to the preamble of claim 1, which is due to the proposed arrangement of the drive and forming assemblies with a small number of functional steps Forming process and which is characterized by a compact stiff design. Furthermore, a Sheet holder system with a high flexibility at low Height proposed.

Stand der Technik:State of the art:

Das Außenhochdruckumformen (AHU), auch als hydromechanisches Ziehverfahren oder hydrostatisches Kaltverfahren bezeichnet, ist seit vielen Jahren bekannt. In der DE 12 40 801 von 1961 ist das Verfahren bereits ausführlich beschrieben, auf diese Beschreibung wird verwiesen. Der verstärkte Einsatz der Außenhochdruckumformung als preiswerte Alternative bei der Kleinserienfertigung führt zu einem wachsenden Bedarf entsprechend ausgerüsteter Umformpressen. Vorteilhaft auf eine Verfahrensverbesserung wirken sich auch die Entwicklungen in der hydraulischen und elektronischen Regelungstechnik aus. Eine auch nach dem Außenhochdruckumformen arbeitenden Kombipresse ist in der DE 198 19 950 offenbart. Zusätzlich ist diese als Hydraulikpresse ausgebildete Maschine noch für die Umformung durch Innenhochdruck und als Tiefziehpresse konzipiert. Für den Einsatzfall Außenhochdruckumformen ergeben sich dann folgende Verfahrensschritte :

  • 1 Platine einlegen
  • 2 Niederhalter nach unten fahren
  • 3 Flüssigkeitskasten mittels Arbeitszylinder hochfahren
  • 4 Niederhalterkraft aufbringen
  • 5 Stößel nach unten fahren
  • 6 Kurz vor Stößellage unterer Totpunkt (UT) fahren die Arbeitszylinder auf
  • 7 Regelung Flüssigkeitsdruck in Flüssigkeitskasten
  • 8 Stößel fährt in UT und einfahren von Verriegelungen
  • 9 Arbeitszylinder fahren weiter aufwärts und Niederhalterzylinder werden verdrängt
  • 10 Durch weiteres hochfahren des Flüssigkastens wird die eingespannte Platine über das auf den fixierten Stößel befindliche Werkzeug gezogen
  • 11 Niederhalter wird auf Block mit den Distanzen und dem Oberholm gedrückt
  • 12 Arbeitszylinder erhöhen Schließdruck
  • 13 Im Flüssigkeitskasten wird ein fluidischer Hochdruck aufgebaut, durch Plastifizierungsvorgang wird die Werkstückkontur ausgebildet
  • 14 Druckentlastung
  • 15 Arbeitszylinder senken Flüssigkeitskasten ab
  • 16 Verriegelung wird ausgefahren
  • 17 Stößel mit Niederhalter wird aufgefahren
  • 18 Werkstück wird entnommen
    • External high pressure forming (AHU), also known as hydromechanical drawing process or hydrostatic cold process, has been known for many years. The process is already described in detail in DE 12 40 801 from 1961, reference is made to this description. The increased use of external high pressure forming as an inexpensive alternative in small series production leads to a growing demand for appropriately equipped forming presses. Developments in hydraulic and electronic control technology also have an advantageous effect on process improvement. A combination press that also works after external high pressure forming is disclosed in DE 198 19 950. This machine, which is designed as a hydraulic press, is also designed for forming by internal high pressure and as a deep-drawing press. The following procedural steps result for the application of external high pressure forming:
  • Insert 1 board
  • 2 Hold down holder
  • 3 Raise the liquid tank using the working cylinder
  • 4 Apply hold-down force
  • Drive 5 plungers down
  • 6 The working cylinders open shortly before the ram position is at bottom dead center (UT)
  • 7 Control of liquid pressure in the liquid tank
  • 8 ram moves into the UT and retraction of locks
  • 9 working cylinders continue to move upwards and hold-down cylinders are displaced
  • 10 By further raising the liquid box, the clamped circuit board is pulled over the tool on the fixed plunger
  • 11 Hold-down device is pressed onto the block with the distances and the upper spar
  • 12 working cylinders increase closing pressure
  • 13 A fluidic high pressure is built up in the liquid box, and the workpiece contour is formed by the plasticizing process
  • 14 Pressure relief
  • 15 working cylinders lower the liquid tank
  • 16 Locking is extended
  • 17 ram with hold-down device is opened
  • 18 workpiece is removed

    • Neben der Vielzahl der Prozeßschritte ist die Presse ausgehend von der Aufgabe als Universal- bzw. Kombipresse zu arbeiten für den jeweiligen Verwendungszweck natürlich nicht optimal gestaltet. In addition to the multitude of process steps, the press based on the task as a universal or combination press of course do not work for the respective purpose optimally designed.

    Aufgabe und Vorteil der Erfindung:Object and advantage of the invention:

    Der Erfindung liegt die Aufgabe zugrunde, eine Presse hoher Steifigkeit für das Außenhochdruckumformen vorzuschlagen, welche eine Reduzierung der Prozeßschritte ermöglicht, bei der der Flüssigkeitskasten stationär angeordnet werden kann und welche über eine frei wählbare und bedarfsgerechte Anordnung der Blechhalterzylinder verfügt.The invention has for its object a high press Propose rigidity for external high pressure forming, which enables a reduction of the process steps at which the liquid box can be arranged stationary and which via a freely selectable and needs-based Arrangement of the plate holder cylinder has.

    Diese Aufgabe wird ausgehend von einer Umformpresse nach dem Oberbegriff des Anspruch 1, durch die kennzeichnenden Merkmale des Anspruch 1 gelöst. In den Unteransprüchen werden vorteilhafte und zweckmäßige Weiterbildungen vorgeschlagen.This task is based on a forming press after the Preamble of claim 1, by the characterizing Features of claim 1 solved. In the subclaims advantageous and expedient further developments are proposed.

    Der Erfindung liegt der Gedanke zugrunde, die Anordnung der Fluidzylinder so zu wählen, daß durch eine direkte Lage im Kraftfluß eine steife und kompakte Bauform gewährleistet ist. Durch ein gemeinsames Verfahren von Stößel und Blechhalter ist nur ein Verfahrzylinder erforderlich und die Blechhaltezylinder können als reine Kurzhubzylinder ausgeführt werden. Diese Kurzhubzylinder sind nicht in einem starren System angeordnet, sondern die Anzahl und deren Anordnung ist entsprechend den Anforderungen des Umformprozesses für die jeweiligen Werkstücke optimal wählbar. Entsprechende kuppelbare Anschlüsse zu der oder den energieführenden Leitungen sind vorgesehen.The invention is based on the idea of arranging the Fluid cylinder to choose so that by a direct location in the Power flow a rigid and compact design is guaranteed. Through a common process of the ram and sheet metal holder only one traversing cylinder is required and the Sheet metal holding cylinders can be used as pure short stroke cylinders be carried out. These short stroke cylinders are not in one rigid system arranged, but the number and their Arrangement is according to the requirements of the Forming process optimal for the respective workpieces selectable. Corresponding couplable connections to the or energy-carrying lines are provided.

    Die das Werkzeug tragenden Arbeitszylinder sind direkt im Stößel integriert. Die Regelung des Gegendruckes findet im stationären Flüssigkeitskasten statt, wodurch eine ortsfeste Verrohrung ermöglicht wird, was bei einem Hochdruckbetrieb einen weiteren Vorteil darstellt. The working cylinders carrying the tool are directly in the Integrated plunger. The regulation of the back pressure takes place in stationary fluid box instead, creating a fixed Piping is enabled, which is a high pressure operation represents another advantage.

    Der Prozeßablauf ist wie folgt:

  • 1 Platine einlegen
  • 2 Gemeinsame Abwärtsbewegung von Stößel und Blechhalter
  • 3 Verriegeln von Stößel mit Blechhalter durch einfahrende Distanzstücke
  • 4 Abfahren des Werkzeuges durch Arbeitszylinder in den Flüssigkeitskasten dabei
  • 4.1 Druckregelung im Flüssigkeitskasten
  • 4.2 Regelung der Blechhaltekraft über Kurzhubzylinder
  • 5 Verriegelung des Werkzeuges im unteren Totpunkt
  • 6 Aufbau der maximalen Blechhaltekraft über Kurzhubzylinder
  • 7 Hochdruckaufbau im Flüssigkasten und Plastifizierungsvorgang des Werkstückes (Kalibrierung)
  • 8 Druckentlastung
  • 9 Verriegelung wird ausgefahren
  • 10 Stößel mit Niederhalter wird aufgefahren
  • 11 Werkstück wird entnommen
    • The process flow is as follows:
  • Insert 1 board
  • 2 Joint downward movement of ram and sheet holder
  • 3 Lock plunger with sheet metal holder using retracting spacers
  • 4 Moving the tool through the working cylinder in the liquid tank
  • 4.1 Pressure control in the liquid tank
  • 4.2 Regulation of the sheet holding force via short-stroke cylinders
  • 5 Lock the tool at bottom dead center
  • 6 Structure of the maximum sheet holding force via short-stroke cylinders
  • 7 High pressure build-up in the liquid box and plasticizing process of the workpiece (calibration)
  • 8 pressure relief
  • 9 The lock is extended
  • 10 plungers with hold-down devices are opened
  • 11 workpiece is removed

    • Damit besteht der gesamte Prozeßablauf aus insgesamt 11 Funktionsschritten die sich teilweise auch noch überlagern. Somit ist als weiterer Vorteil auch eine hohe Taktzahl und ein wirtschaftlicher Einsatz der Presse gewährleistet.The entire process flow thus consists of a total of 11 Functional steps that sometimes overlap. Thus, another advantage is a high number of cycles and an economical use of the press is guaranteed.

    Eine günstige Energiebilanz durch geringe erforderliche Ölmengen ergibt sich durch den gemeinsamen Verfahrzylinder für Stößel und Blechhalter und die Verwendung der Kurzhubzylinder zur Regelung der Blechhaltekraft und dem Aufbau der maximalen Zuhaltekraft. Da die Kurzhubzylinder den Umformweg nicht mitfahren, sondern nur einen Hub von wenigen Millimetern ausführen, ergibt sich eine preiswerte Bauform mit einer geringen Bauhöhe. Dieses ist auch von Vorteil, wenn aufgrund der Werkstückgeometrie eine Vielpunktabstützung erforderlich ist. A favorable energy balance due to the low required Oil quantities result from the common travel cylinder for rams and sheet metal holders and the use of the Short stroke cylinder for regulating the sheet metal holding force and the Building the maximum locking force. Since the short stroke cylinder Do not travel along the forming path, but only a stroke of a few Execute millimeters results in an inexpensive design with a low overall height. This is also an advantage, though multi-point support due to the workpiece geometry is required.

    Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden FigurenbeschreibungFurther details and advantages of the invention emerge from the following description of the figures

    Diese Figuren zeigen:

    Figur 1:
    Frontansicht der Umformpresse in Schnittdarstellung gemäß Schnittlinie A-A in Figur 3
    Figur 2:
    Seitenansicht der Umformpresse in Schnittdarstellung B-B, jedoch Werkzeug im unteren Totpunkt
    Figur 3:
    Draufsicht der Umformpresse gemäß Schnittlinie C-C
    These figures show:
    Figure 1:
    Front view of the forming press in a sectional view along section line AA in FIG. 3
    Figure 2:
    Side view of the forming press in sectional view BB, but with the tool at bottom dead center
    Figure 3:
    Top view of the forming press according to section line CC

    Beschreibung der Umformpresse:Description of the forming press:

    Figur 1 zeigt den prinzipiellen Aufbau der Umformpresse, bestehend aus Pressenständer 1, Stößel 2, Blechhalter 3, Tisch 4, Fahrzylinder 5, Arbeitszylinder 6, Kurzhubzylinder 7, Verriegelung 8, Werkzeug 9, Flüssigkeitskasten 10 und Platine 11.FIG. 1 shows the basic structure of the forming press, consisting of press stand 1, ram 2, sheet holder 3, Table 4, driving cylinder 5, working cylinder 6, short-stroke cylinder 7, lock 8, tool 9, liquid box 10 and Board 11.

    In der Darstellung ist der Beginn des Umformvorganges zu ersehen. Fahrzylinder 5 hat Stößel 2 mit Blechhalter 3 soweit abgesenkt, daß der Blechhalter 3 auf der Platine 11 aufsetzt. Über die Kurzhubzylinder 7 erfolgt ein geregelter Druckaufbau für die Blechhaltekraft in Abhängigkeit von dem Umformvorgang. Die Zahl und Anordnung der Kurzhubzylinder 7 wird in Abhängigkeit des Werkzeuges und der Platine gewählt. Bestimmungsgrößen bei dem Werkzeug sind z.B. die Werkzeuggröße und die Werkzeugkontur, bei der Platine sind unter anderem mechanische Werkstoffeigenschaften, Umformgeschwindigkeiten und tribologische Vorgänge wichtig. The beginning of the forming process is closed in the illustration see. Travel cylinder 5 has plunger 2 with sheet holder 3 so far lowered that the sheet metal holder 3 touches the circuit board 11. A regulated pressure build-up takes place via the short-stroke cylinder 7 for the sheet holding force depending on that Forming process. The number and arrangement of the short-stroke cylinders 7 is selected depending on the tool and the board. Determinants for the tool are e.g. the Tool size and the tool contour that are on the board among other things mechanical material properties, Forming speeds and tribological processes are important.

    Zur Erreichung der gewünschten Umformergebnisse kann jeder Kurzhubzylinder 7 einzeln geregelt werden oder in Gruppen zusammengeschlossen sein.Anyone can achieve the desired forming results Short stroke cylinders 7 can be regulated individually or in groups be united.

    Im weiteren Prozeßablauf fahren die im Stößel 2 integrierten Arbeitszylinder 6 mit dem Werkzeug 9 gegen das im Flüssigkeitskasten 10 befindliche Flüssigkeitspolster. Eine nicht näher dargestellte Druckregeleinrichtung regelt den erforderlichen Druck des Flüssigkeitspolsters ein.In the further process run the integrated in the plunger 2 Working cylinder 6 with the tool 9 against that in Liquid box 10 liquid pads located. A Pressure control device, not shown, controls the required pressure of the fluid cushion.

    Das Werkzeug wird in seine tiefste Lage 13 gefahren, die z.B. durch Anschläge begrenzt ist und wird durch in Figur 3 dargestellte einfahrbare Werkzeugdistanzen 12 verriegelt. Diese Verriegelung ist erforderlich um einen hohen Druck der zum Abschluß des Umformvorganges in dem Flüssigkeitskasten 10 aufgebaut wird sicher abzustützen. Durch diesen Druck wird das Werkstück in einer Art Kalibrierung in die Werkzeugkontur gedrückt und ausgeformt. Zu diesem Zweck wird durch Kurzhubzylinder 7 eine maximale Blechhaltekraft erzeugt, die eine sichere Einspannung des Platinen- bzw. Werkstückrandes gewährleistet. Die durch diese Kräfte auftretenden Dehnungen bzw. Stauchungen der Pressenbauteile werden in vorteilhafter Weise durch die Anordnung und den Hub der Kurzhubzylinder 7 ausgeglichen. Fluidkupplungen 16 dienen zur Verbindung der jeweils erforderlichen Kurzhubzylinder mit der Energieversorgung. Eine Halte- oder Werkzeugoberplatte 17 ist mit dem Stößel 2 verbunden und ermöglicht einen einfachen Ein- und Ausbau der Arbeitszylinder 6.The tool is moved to its lowest position 13, which e.g. is limited by stops and is shown in FIG. 3 Retractable tool distances 12 shown locked. This lock is required to keep the pressure high to complete the forming process in the liquid box 10 is built to support safely. This pressure will the workpiece in a kind of calibration in the tool contour pressed and shaped. For this purpose, through Short stroke cylinder 7 generates a maximum sheet holding force that secure clamping of the board or workpiece edge guaranteed. The strains caused by these forces or compression of the press components are more advantageous Way through the arrangement and stroke of the short-stroke cylinder 7th balanced. Fluid couplings 16 serve to connect the each required short stroke cylinder with the Power supply. A holding or tool top plate 17 is connected to the plunger 2 and allows easy Installation and removal of the working cylinder 6.

    Figur 2 zeigt die Situation im unteren Totpunkt. Im Flüssigkeitskasten 10 ist das Druckmedium 14 mit einem maximalen Druck beaufschlagt in dem in einem plastifizierenden Umformvorgang die endgültige Bauteilgeometrie ausgeformt wird. Ein nachfließen des eingespannten Platinenrandes ist bei diesem Kalibrierungsvorgang unerwünscht und wird durch die von den Kurzhubzylindern 7 erzeugte maximale Zuhaltekraft sicher verhindert. Die in dieser Phase auftretenden großen Kräfte werden durch Zusammenwirkung mit den eingefahrenen Stößelverriegelungen 8 und Werkzeugdistanzen 12 in einer Art geschlossenen System aufgenommen. Hier zeigt sich eine weiterer Vorteil der gewählten Anordnung, da die Kompressibilität des Fluidmediums im wesentlichen bei diesem Konzept ausgeschlossen ist.Figure 2 shows the situation at bottom dead center. in the Liquid box 10 is the pressure medium 14 with a maximum pressure applied in one plasticizing the final process Component geometry is formed. A flow of the clamped edge of the board is with this Calibration process is undesirable and is carried out by the Short stroke cylinders 7 generated maximum locking force safely prevented. The great forces that arise in this phase are by interacting with the retracted Ram locks 8 and tool distances 12 in one type closed system added. Here is one Another advantage of the chosen arrangement, since the Compressibility of the fluid medium essentially in this Concept is excluded.

    Figur 3 ist eine Schnittdarstellung die eine Anordnung der Kurzhubzylinder 7 zeigt. Wie bereits erwähnt ist sowohl die Anordnung als auch Anzahl der Kurzhubzylinder 7 entsprechend dem Bauteil frei wählbar. Die verfahrbaren Werkzeugdistanzen sind mit 12 und die zugehörigen Verschiebezylinder mit 15 bezeichnet. In der gezeigten Lage sind die Werkzeugdistanzen 12 ausgefahren, d.h. das Werkzeug 9 ist nicht mehr verriegelt.Figure 3 is a sectional view showing an arrangement of the Short stroke cylinder 7 shows. As already mentioned, both the Arrangement and number of short-stroke cylinders 7 accordingly the component is freely selectable. The movable tool distances are with 12 and the associated shift cylinder with 15 designated. The tool distances are in the position shown 12 extended, i.e. the tool 9 is no longer locked.

    Die Erfindung ist nicht auf das beschriebene und dargestellte Ausführungsbeispiel beschränkt. Sie umfaßt auch alle fachmännischen Ausgestaltungen im Rahmen des geltenden Anspruch 1.

    1
    Pressenständer
    2
    Stößel
    3
    Blechhalter
    4
    Tisch
    5
    Fahrzylinder
    6
    Arbeitszylinder
    7
    Kurzhubzylinder
    8
    Verriegelung
    9
    Werkzeug
    10
    Flüssigkeitskasten
    11
    Platine
    12
    Werkzeugdistanzen
    13
    Werkzeug UT
    14
    Druckmedium
    15
    Verschiebezylinder
    16
    Fluidkupplung
    17
    Halteplatte
    The invention is not restricted to the exemplary embodiment described and illustrated. It also includes all professional designs within the scope of the current claim 1.
    1
    Press stand
    2
    Pestle
    3rd
    Sheet holder
    4th
    table
    5
    Drive cylinder
    6
    Working cylinder
    7
    Short stroke cylinder
    8th
    Interlock
    9
    Tool
    10
    Fluid box
    11
    circuit board
    12th
    Tool distances
    13
    Tool UT
    14
    Print medium
    15
    Shift cylinder
    16
    Fluid coupling
    17th
    Retaining plate

    Claims (8)

    1. Press for external hydroforming with a locable ram (2) which can be moved up and down and a plate holder (3), with a plate holder cylinder (7), with pressure-regulated fluid box (10) receiving pressure medium (14) and with working cylinder (6) for shaping, characterised in that ram (2) and a plate holder (3) can be driven together, the plate holder cylinder (7) being designed as a short stroke cylinder and the working cylinder (6) bearing the tool being integrated in the ram (2).
    2. Press for external hydroforming according to claim 1, characterised in that ram (2) and a plate holder (3) can be driven by a common driving cylinder (5).
    3. Press for external hydroforming according to claim 1, characterised in that short stroke cylinders (7) are freely selectable in arrangement and/or number.
    4. Press for external hydroforming according to claim 1, characterised in that fluid couplings (16) are provided on the ram (2).
    5. Press for external hydroforming according to claim 1, characterised in that short stroke cylinders (7) can be controlled individually or in groups.
    6. Press for external hydroforming according to claim 1, characterised in that short stroke cylinders (7) can be pressure-regulated according to predetermined desired curves for the plate holding force.
    7. Press for external hydroforming according to claim 1,
      characterised in that short stroke cylinder (7) can be subjected to pressure in such a way that the blank (11) can be fixed.
    8. Press for external hydroforming according to claim 1, characterised in that the tool (9) can be locked by tool spacers (12).
    EP00111618A 1999-06-23 2000-05-31 Press for external hydroforming Expired - Lifetime EP1063028B2 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19928422A DE19928422A1 (en) 1999-06-23 1999-06-23 Press for external high pressure molding
    DE19928422 1999-06-23

    Publications (3)

    Publication Number Publication Date
    EP1063028A1 EP1063028A1 (en) 2000-12-27
    EP1063028B1 true EP1063028B1 (en) 2001-10-31
    EP1063028B2 EP1063028B2 (en) 2007-06-13

    Family

    ID=7912054

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00111618A Expired - Lifetime EP1063028B2 (en) 1999-06-23 2000-05-31 Press for external hydroforming

    Country Status (5)

    Country Link
    US (1) US6481256B1 (en)
    EP (1) EP1063028B2 (en)
    CA (1) CA2312435C (en)
    DE (2) DE19928422A1 (en)
    ES (1) ES2167301T5 (en)

    Cited By (1)

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    DE10202411A1 (en) * 2002-01-22 2003-07-31 Thyssenkrupp Ag Wall panel for a curtain wall and method for manufacturing wall panels

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    DE50003807D1 (en) * 1999-08-10 2003-10-30 Mueller Weingarten Maschf Locking device for hydraulically driven presses
    DE10110162B4 (en) * 2001-03-02 2006-07-27 Audi Ag Forming tool for hydromechanical deep drawing of workpieces from sheet metal blanks
    DE10110161A1 (en) * 2001-03-02 2003-01-02 Audi Ag Forming tool for hydromechanical deep drawing of workpieces from sheet metal blanks
    DE10305654B3 (en) * 2003-02-12 2004-02-26 Thyssenkrupp Stahl Ag Machine tool used in external high pressure deformation of billets, especially in the manufacture of wall panels, comprises a holding-down device, form stamp and form hollow body with exchangeable inserts
    DE10339004B4 (en) * 2003-08-25 2006-09-28 Wieber, Christian, Dipl.-Ing.(FH), Batu Caves Hydraulic press
    DE102004059141A1 (en) * 2004-12-08 2006-06-14 Wieber, Christian, Dipl.-Ing.(FH), Batu Caves Hydraulic press for deforming sheet metal comprises working cylinders integrated into a press frame disposed on a relatively short lift, interlocking locking elements for transferring closing forces to a tappet and a driving unit
    US8118197B2 (en) * 2007-06-18 2012-02-21 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
    US7614270B2 (en) * 2008-02-14 2009-11-10 Ford Global Technologies, Llc Method and apparatus for superplastic forming
    CN101596563B (en) * 2009-07-03 2010-12-22 吉林大学 Plate stretch-forming machine
    AT509004B1 (en) * 2009-10-30 2011-07-15 Trumpf Maschinen Austria Gmbh PRESS AND TOOL WITH HOLDING DEVICE FOR ONE WORKPIECE
    CN102233382B (en) * 2010-04-26 2016-03-09 扬州广菱电子有限公司 A kind of progressive die for liquid crystal inner components
    CN107599062B (en) * 2015-07-30 2019-07-26 扬州广菱电子有限公司 A kind of segment difference molding die

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    Also Published As

    Publication number Publication date
    DE19928422A1 (en) 2000-12-28
    EP1063028A1 (en) 2000-12-27
    ES2167301T3 (en) 2002-05-16
    CA2312435A1 (en) 2000-12-23
    ES2167301T5 (en) 2008-01-16
    EP1063028B2 (en) 2007-06-13
    DE50000026D1 (en) 2001-12-06
    US6481256B1 (en) 2002-11-19
    CA2312435C (en) 2006-04-25

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