EP0351741B1 - Press for making sheet metal parts in several steps - Google Patents

Press for making sheet metal parts in several steps Download PDF

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Publication number
EP0351741B1
EP0351741B1 EP19890112999 EP89112999A EP0351741B1 EP 0351741 B1 EP0351741 B1 EP 0351741B1 EP 19890112999 EP19890112999 EP 19890112999 EP 89112999 A EP89112999 A EP 89112999A EP 0351741 B1 EP0351741 B1 EP 0351741B1
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EP
European Patent Office
Prior art keywords
press
frame
die
tools
bolster plate
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
EP19890112999
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German (de)
French (fr)
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EP0351741A1 (en
Inventor
Günther Haller
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.)
Allgaier Werke GmbH and Co KG
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Allgaier Werke GmbH and Co KG
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Publication of EP0351741A1 publication Critical patent/EP0351741A1/en
Application granted granted Critical
Publication of EP0351741B1 publication Critical patent/EP0351741B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • 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
    • B21D24/005—Multi-stage presses

Definitions

  • the invention relates to a press for the production of sheet metal parts in several stages, with a press frame, a ram movable relative to the press frame, on the underside of which the tool upper parts of a number of tools of a tool set corresponding to the number of stages can be attached, a clamping plate arranged below the ram , on the top of which the tool lower parts of the tool set can be fastened, and at least one number of pressure-medium-operated, individually controllable die cushions corresponding to the number of tools, which are arranged under the clamping plate in the step increments between the tools, and in each case above in the clamping plate axially displaceably mounted bolts can be connected to a sheet metal holder of the respective tool.
  • a press of this type is known for example from GB-A-1250117.
  • the object of the invention is to design the generic press in such a way that different tool sets with different steps can be driven on it.
  • the object of the invention is achieved on the basis of a press according to the preamble of claim 1 in that the die cushions are arranged in a frame having the clamping plate as an integral part, which forms a detachably connectable unit with the press frame, which consists of a number of interchangeable Units are selected whose die cushions have different average distances for different steps.
  • the die cushions are therefore interchangeable, so that one and the same press can be used for different tool sets with different steps.
  • the die cushions can be changed easily, and the time required for converting the press can also be kept short by the fact that the new tool set is already outside the press on the platen of the available unit Die cushion and frame can be attached.
  • a number of sheet metal forming operations can be carried out for which previously several presses or even a press line were required. Since no further presses have to be provided for performing additional sheet metal forming operations, the investment costs and the space required for the equipment required for sheet metal forming are lower than before.
  • the invention also has the advantage that existing presses with one or more permanently installed die cushions can be converted into presses according to the invention with little effort. From a simple press with just one die cushion, e.g. a transfer press for the production of sheet metal parts can be made in several stages in a simple manner, such a transfer press also having the advantage that different tool sets can be used with different steps.
  • a simple press with just one die cushion e.g. a transfer press for the production of sheet metal parts can be made in several stages in a simple manner, such a transfer press also having the advantage that different tool sets can be used with different steps.
  • the units made of die cushions and frames on the press table of the press are particularly advantageous for existing presses.
  • the arrangement of the units on the press table also has the advantage that a high rigidity of the press is achieved regardless of the design of the die cushion and frame unit.
  • the single-acting transfer press shown in Fig. 1 has an O-shaped press frame 1 and a single plunger 2 movable by an upper drive, on the underside of which the tool upper parts 3 are detachably fastened by several tools.
  • the corresponding lower parts 4 of the tools are releasably attached to the top of a platen 5, which is part of an exchangeable unit 6.
  • the unit 6 consists of a frame, of which the platen 5 is an integral part.
  • the frame has a base plate 7 on which the platen 5 is supported by ribs 8 made in one piece with the platen 5.
  • the base plate 7 is firmly connected to the free ends of the ribs 8 and thus to the clamping plate 5.
  • Each die cushion 10 has a pressure-medium-operated piston-cylinder unit 11 and a die cushion plate 12 fastened to the piston end, which is displaceably guided on the ribs 8.
  • a plurality of bolts 13 are supported on each die cushion plate 12 and are axially displaceably mounted in the clamping plate. The bolts 13 connect the die cushions 10 to the sheet metal holders of the tools, so that the die cushions 10 can actuate the sheet metal holders during operation of the press.
  • the average distance mA between two adjacent die cushions 10 is shown in FIG. 2.
  • the average distance between the die cushions 10 corresponds to the step between two adjacent tools, of which the lower parts on the platen 5 of the respective unit 6, 6 'are arranged.
  • the units 6,6 ' have different average distances between the die cushions, so that tool sets with different steps can be used.
  • the variability of the step steps between the tools is illustrated in Fig. 1 in that a unit 6 is just installed in the press, which carries the lower parts 4 of a total of four tools of a tool set and has a corresponding number of die cushions, and that in addition to the Press standing unit 6 'carries the lower parts 4' of a total of eight tools from another tool set, the unit 6 'with the same external dimensions as the unit 6 including eight die cushions.
  • the average distance between the die cushions naturally becomes smaller.
  • the tool upper parts 3 are releasably attached to the plunger 2 and are exchangeable, their step length being variable and corresponding to the size and number of the selected tools.
  • Fig. 1a two pairs of interchangeable gripper rails 14,14 'for the gradual transport of the sheet metal parts to be manufactured are shown in perspective. While the pair of gripper rails 14 is installed in the press when the unit 6 is used with four tools as shown, the pair of gripper rails 14 is intended for the press when the unit 6 'with eight tools is used as shown.
  • the transfer press according to the invention thus enables a variable step between the tools, so that tool sets of different sizes can be installed in the press with more or fewer operating options.

Landscapes

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

Description

Die Erfindung betrifft eine Presse zur Herstellung von Blechformteilen in mehreren Stufen, mit einem Pressengestell, einem relativ zum Pressengestell bewegbaren Stößel, an dessen Unterseite die Werkzeug-Oberteile von einer der Stufenzahl entsprechenden Anzahl von Werkzeugen eines Werkzeugsatzes befestigbar sind, einer unterhalb des Stößels angeordneten Aufspannplatte, auf deren Oberseite die Werkzeug-Unterteile des Werkzeugsatzes befestigbar sind, und mindestens einer der Zahl der Werkzeuge entsprechenden Anzahl von druckmittelbetriebenen, einzeln steuerbaren Ziehkissen, die unter der Aufspannplatte in den Stufenschritten zwischen den Werkzeugen entsprechenden mittleren Abständen angeordnet sind und jeweils über in der Aufspannplatte axial verschiebbar gelagerten Bolzen mit einem Blechhalter des jeweiligen Werkzeuges verbindbar sind. Eine Presse dieser Gattung ist beispielsweise aus der GB-A-1250117 bekannt.The invention relates to a press for the production of sheet metal parts in several stages, with a press frame, a ram movable relative to the press frame, on the underside of which the tool upper parts of a number of tools of a tool set corresponding to the number of stages can be attached, a clamping plate arranged below the ram , on the top of which the tool lower parts of the tool set can be fastened, and at least one number of pressure-medium-operated, individually controllable die cushions corresponding to the number of tools, which are arranged under the clamping plate in the step increments between the tools, and in each case above in the clamping plate axially displaceably mounted bolts can be connected to a sheet metal holder of the respective tool. A press of this type is known for example from GB-A-1250117.

Bei einer solchen in der Praxis bekannten Presse sind die Ziehkissen fest in einen Pressentisch eingebaut, der einen festen Bestandteil des Pressengestells bildet, wobei die mittleren Abstände zwischen den Ziehkissen und infolgedessen die Stufenschritte zwischen den Werkzeugen fest sind. Daher ist eine solche Presse nur mit solchen Werkzeugsätzen bestückbar, deren Stufenschritte gleichbleibend sind. Werkzeugsätze mit anderen Stufenschritten erfordern eine andere Presse mit entsprechend anderen mittleren Abständen zwischen den Ziehkissen.In such a press known in practice, the die cushions are firmly installed in a press table which forms an integral part of the press frame, the mean distances between the die cushions and, consequently, the step steps between the tools being fixed. Therefore, such a press can only be equipped with tool sets whose step steps are constant. Tool sets with different step steps require a different press with different mean distances between the die cushions.

Unter Berücksichtigung, daß solche Pressen mit erheblichen Investitionskosten behaftet sind und außerdem viel Raum beanspruchen, wird es als Nachteil empfunden, daß eine Änderung der Stufenschritte zwischen den Werkzeugen nur in Verbindung mit der Bereitstellung einer anderen entsprechend ausgelegten Presse möglich ist.Taking into account that such presses involve considerable investment costs and also take up a lot of space, it is perceived as a disadvantage that a change in the step steps between the tools is only possible in connection with the provision of another suitably designed press.

Die Aufgabe der Erfindung besteht darin, die gattungsgemäße Presse so auszubilden, daß verschiedene Werkzeugsätze mit unterschiedlichen Stufenschritten auf ihr gefahren werden können.The object of the invention is to design the generic press in such a way that different tool sets with different steps can be driven on it.

Die Aufgabe der Erfindung wird ausgehend von einer Presse nach dem Oberbegriff des Anspruchs 1 dadurch gelöst, daß die Ziehkissen in einem die Aufspannplatte als integralen Bestandteil aufweisenden Rahmen angeordnet sind, der eine mit dem Pressengestell lösbar verbindbare Einheit bildet, die aus einer Anzahl von gegeneinander austauschbaren Einheiten ausgewählt ist, deren Ziehkissen verschiedene mittlere Abstände für unterschiedliche Stufenschritte aufweisen.The object of the invention is achieved on the basis of a press according to the preamble of claim 1 in that the die cushions are arranged in a frame having the clamping plate as an integral part, which forms a detachably connectable unit with the press frame, which consists of a number of interchangeable Units are selected whose die cushions have different average distances for different steps.

Bei der erfindungsgemäßen Presse sind also die Ziehkissen austauschbar, so daß ein und dieselbe Presse für verschiedene Werkzeugsätze mit unterschiedlichen Stufenschritten eingesetzt werden kann. Durch die Anordnung der Ziehkissen in einem vom Pressengestell lösbaren Rahmen ist der Wechsel der Ziehkissen einfach durchführbar, wobei die für die Umrüstung der Presse erforderliche Zeit auch dadurch klein gehalten werden kann, daß der neue Werkzeugsatz bereits außerhalb der Presse auf der Aufspannplatte der bereitstehenden Einheit aus Ziehkissen und Rahmen befestigt werden kann. Mit der erfindungsgemäßen Presse können eine Reihe von Blechumformungsoperationen durchgeführt werden, für die bislang mehrere Pressen oder sogar eine Pressenstraße erforderlich waren. Da keine weiteren Pressen für die Durchführung zusätzlicher Blechumformungsoperationen bereitgestellt werden müssen, sind die Investitionskosten und der Platzbedarf für die für die Blechumformung erforderlichen Einrichtungen geringer als bisher.In the press according to the invention, the die cushions are therefore interchangeable, so that one and the same press can be used for different tool sets with different steps. By arranging the die cushions in a frame that can be detached from the press frame, the die cushions can be changed easily, and the time required for converting the press can also be kept short by the fact that the new tool set is already outside the press on the platen of the available unit Die cushion and frame can be attached. With the press according to the invention, a number of sheet metal forming operations can be carried out for which previously several presses or even a press line were required. Since no further presses have to be provided for performing additional sheet metal forming operations, the investment costs and the space required for the equipment required for sheet metal forming are lower than before.

Die Erfindung hat ferner den Vorteil, daß bestehende Pressen mit einem oder mehreren fest eingebauten Ziehkissen in erfindungsgemäße Pressen mit geringem Aufwand umgebaut werden können. Aus einer einfachen Presse mit nur einem Ziehkissen kann so z.B. eine Transferpresse für die Herstellung von Blechformteilen in mehreren Stufen auf einfache Art und Weise gemacht werden, wobei eine solche Transferpresse zusätzlich den Vorteil hat, daß verschiedene Werkzeugsätze mit unterschiedlichen Stufenschritten verwendet werden können.The invention also has the advantage that existing presses with one or more permanently installed die cushions can be converted into presses according to the invention with little effort. From a simple press with just one die cushion, e.g. a transfer press for the production of sheet metal parts can be made in several stages in a simple manner, such a transfer press also having the advantage that different tool sets can be used with different steps.

Nach einer Weiterbildung der Erfindung können die Einheiten aus Ziehkissen und Rahmen auf dem Pressentisch der Presse angeordnet werden. Besonders bei bestehenden Pressen ist diese Möglichkeit von großem Vorteil. Die Anordnung der Einheiten auf dem Pressentisch hat aber auch den Vorteil, daß eine hohe Steifigkeit der Presse unabhängig von der Ausbildung der Ziehkissen- und Rahmeneinheit erzielt wird.According to a development of the invention, the units made of die cushions and frames on the press table of the press. This option is particularly advantageous for existing presses. The arrangement of the units on the press table also has the advantage that a high rigidity of the press is achieved regardless of the design of the die cushion and frame unit.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigt

  • Fig. 1 eine perspektivische Darstellung einer einfachwirkenden Transferpresse mit einer zum Austausch bereitstehenden Ziehkissen- und Rahmeneinheit, auf der die Unterteile des neuen Werkzeugsatzes bereits angeordnet sind,
  • Fig. 1a eine perspektivische Darstellung von zwei Paaren austauschbarer Greiferschienen und
  • Fig. 2 einen weggebrochenen Schnitt durch eine Ziehkissen- und Rahmeneinheit für die in Fig. 1 dargestellte erfindungsgemäße Presse.
An embodiment of the invention is shown in the drawings and will be described in more detail below. It shows
  • 1 is a perspective view of a single-acting transfer press with a die cushion and frame unit ready for replacement, on which the lower parts of the new tool set are already arranged,
  • Fig. 1a is a perspective view of two pairs of interchangeable gripper rails and
  • Fig. 2 is a broken away section through a die cushion and frame unit for the press according to the invention shown in Fig. 1.

Die in Fig. 1 dargestellte einfachwirkende Transferpresse weist ein O-förmiges Pressengestell 1 und einen einzigen durch einen Oberantrieb bewegbaren Stößel 2 auf, an dessen Unterseite die Werkzeug-Oberteile 3 von mehreren Werkzeugen lösbar befestigt sind. Die entsprechenden Unterteile 4 der Werkzeuge sind auf der Oberseite einer Aufspannplatte 5 lösbar befestigt, die Teil einer austauschbaren Einheit 6 ist.The single-acting transfer press shown in Fig. 1 has an O-shaped press frame 1 and a single plunger 2 movable by an upper drive, on the underside of which the tool upper parts 3 are detachably fastened by several tools. The corresponding lower parts 4 of the tools are releasably attached to the top of a platen 5, which is part of an exchangeable unit 6.

Wie aus Fig. 2 ersichtlich ist, besteht die Einheit 6 aus einem Rahmen, von dem die Aufspannplatte 5 ein integraler Bestandteil ist. Neben der Aufspannplatte 5 weist der Rahmen eine Grundplatte 7 auf, auf der sich die Aufspannplatte 5 über einstückig mit der Aufspannplatte 5 ausgeführten Rippen 8 abstützt. Die Grundplatte 7 ist mit den freien Enden der Rippen 8 und damit mit der Aufspannplatte 5 fest verbunden. Zwischen den Rippen 8 ergeben sich Kammern 9, in denen eine der Werkzeug- oder Stufenzahl entsprechende Anzahl von druckmittelbetriebenen, einzeln steuerbaren Ziehkissen 10 angeordnet ist, wobei ein Ziehkissen 10 genau unterhalb jeweils eines Werkzeuges angeordnet ist.As can be seen from Fig. 2, the unit 6 consists of a frame, of which the platen 5 is an integral part. In addition to the platen 5, the frame has a base plate 7 on which the platen 5 is supported by ribs 8 made in one piece with the platen 5. The base plate 7 is firmly connected to the free ends of the ribs 8 and thus to the clamping plate 5. Between the ribs 8 there are chambers 9, in which a number of pressure medium-operated, individually controllable drawing cushions 10 is arranged corresponding to the number of tools or stages, a drawing cushion 10 being arranged exactly below each tool.

Jedes Ziehkissen 10 weist eine druckmittelbetriebene Kolben-Zylinder-Einheit 11 und eine am Kolbenende befestigte Ziehkissenplatte 12 auf, die an den Rippen 8 verschiebbar geführt ist. Auf jeder Ziehkissenplatte 12 stützen sich mehrere Bolzen 13 ab, die in der Aufspannplatte axial verschiebbar gelagert sind. Die Bolzen 13 verbinden die Ziehkissen 10 mit den Blechhaltern der Werkzeuge, so daß im Betrieb der Presse die Ziehkissen 10 die Blechhalter betätigen können.Each die cushion 10 has a pressure-medium-operated piston-cylinder unit 11 and a die cushion plate 12 fastened to the piston end, which is displaceably guided on the ribs 8. A plurality of bolts 13 are supported on each die cushion plate 12 and are axially displaceably mounted in the clamping plate. The bolts 13 connect the die cushions 10 to the sheet metal holders of the tools, so that the die cushions 10 can actuate the sheet metal holders during operation of the press.

In Fig. 2 ist der mittlere Abstand mA zwischen zwei benachbarten Ziehkissen 10 eingezeichnet. Der mittlere Abstand zwischen den Ziehkissen 10 entspricht dem Stufenschritt zwischen zwei benachbarten Werkzeugen, von denen die Unterteile auf der Aufspannplatte 5 der jeweiligen Einheit 6, 6′ angeordnet sind.The average distance mA between two adjacent die cushions 10 is shown in FIG. 2. The average distance between the die cushions 10 corresponds to the step between two adjacent tools, of which the lower parts on the platen 5 of the respective unit 6, 6 'are arranged.

Die Einheiten 6,6′haben verschiedene mittlere Abstände der Ziehkissen, so daß Werkzeugsätze mit unterschiedlichen Stufenschritten verwendet werden können. Die Veränderbarkeit der Stufenschritte zwischen den Werkzeugen ist in Fig. 1 dadurch veranschaulicht, daß in der Presse eine Einheit 6 gerade eingebaut ist, welche die Unterteile 4 von insgesamt vier Werkzeugen eines Werkzeugsatzes trägt und eine entsprechende Anzahl von Ziehkissen aufweist, und daß die neben der Presse stehende Einheit 6′ die Unterteile 4′ von insgesamt acht Werkzeugen eines anderen Werkzeugsatzes trägt, wobei die Einheit 6′ bei den gleichen Außenabmessungen wie die Einheit 6 acht Ziehkissen beinhaltet. Mit zunehmender Anzahl der Ziehkissen wird der mittlere Abstand zwischen den Ziehkissen natürlich kleiner.The units 6,6 'have different average distances between the die cushions, so that tool sets with different steps can be used. The variability of the step steps between the tools is illustrated in Fig. 1 in that a unit 6 is just installed in the press, which carries the lower parts 4 of a total of four tools of a tool set and has a corresponding number of die cushions, and that in addition to the Press standing unit 6 'carries the lower parts 4' of a total of eight tools from another tool set, the unit 6 'with the same external dimensions as the unit 6 including eight die cushions. As the number of die cushions increases, the average distance between the die cushions naturally becomes smaller.

Zum Austausch der Einheiten 6 bzw. 6′ muß lediglich die Verbindung zwischen der Einheit 6 und dem Pressengestell 1 gelöst werden, die Einheit 6 aus der Presse herausgenommen und dafür die Einheit 6′ eingesetzt werden und die Verbindung zwischen dem Pressengestell 1 und der Einheit 6′ hergestellt werden.To replace the units 6 and 6 'only the connection between the unit 6 and the press frame 1 has to be released, the unit 6 removed from the press and the unit 6' used for this and the connection between the press frame 1 and the unit 6 ' getting produced.

Die Werkzeug-Oberteile 3 sind am Stößel 2 lösbar befestigt und austauschbar, wobei ihre Schrittlänge variabel ist und der Größe und Anzahl der ausgewählten Werkzeuge entspricht.The tool upper parts 3 are releasably attached to the plunger 2 and are exchangeable, their step length being variable and corresponding to the size and number of the selected tools.

In Fig. 1a sind zwei Paare von austauschbaren Greiferschienen 14,14′ für den schrittweisen Transport der herzustellenden Blechformteile perspektivisch dargestellt. Während das Greiferschienenpaar 14 dann in die Presse eingebaut ist, wenn die Einheit 6 mit vier Werkzeugen wie dargestellt verwendet wird, ist das Greiferschienenpaar 14 für die Presse bestimmt, wenn die Einheit 6′ mit acht Werkzeugen wie dargestellt zum Einsatz gelangt.In Fig. 1a, two pairs of interchangeable gripper rails 14,14 'for the gradual transport of the sheet metal parts to be manufactured are shown in perspective. While the pair of gripper rails 14 is installed in the press when the unit 6 is used with four tools as shown, the pair of gripper rails 14 is intended for the press when the unit 6 'with eight tools is used as shown.

Die erfindungsgemäße Transferpresse ermöglicht somit einen variablen Stufenschritt zwischen den Werkzeugen, so daß verschieden große Werkzeugsätze mit mehr oder weniger Operationsmöglichkeiten in die Presse eingebaut werden können.The transfer press according to the invention thus enables a variable step between the tools, so that tool sets of different sizes can be installed in the press with more or fewer operating options.

Claims (3)

  1. Power press for making formed sheet metal in several steps, with a press frame (1), a slide (2) movable relative to the press frame (1) and having a bottom side to which the upper tool parts (3) of tools of a tool set are mounted in correspondence to the number of steps, a bolster plate (5) disposed below the slide and having a top side to which the lower tool parts (4) of the tool set are mounted, and hydraulic and individually controllable die cushions (10) at a number at least corresponding to the number of tools (3,4) and spaced below the bolster plate (5) at a mean distance corresponding to the progressions between the tools, with each die cushion being connectable with a blank holder of the respective tool (4) via bolts which are supported for axial displacement in the bolster plate (5), characterized in that the die cushions (10) are arranged in a frame which includes the bolster plate (5) as integral part and forms with the press frame (1) a detachably connectable unit (6, 6′) which is selected from a number of mutually exchangeable units (6, 6′), with the die cushion (10) having varying mean distances (mA) for different progressions.
  2. Power press according to claim 1, characterized in that the frame has a bed plate (7) which is spaced at a distance below the bolster plate (5), with the bolster plate (5) being supported by the bed plate (7) via columns (8) between which the die cushions (10) are arranged.
  3. Power press according to claim 1 or claim 2, with a press bed securely fixed to the press frame, characterized in that the respective unit (6, 6′) of frame and die cushion (10) is arranged on the press bed.
EP19890112999 1988-07-22 1989-07-14 Press for making sheet metal parts in several steps Expired - Lifetime EP0351741B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883824997 DE3824997C1 (en) 1988-07-22 1988-07-22
DE3824997 1988-07-22

Publications (2)

Publication Number Publication Date
EP0351741A1 EP0351741A1 (en) 1990-01-24
EP0351741B1 true EP0351741B1 (en) 1993-03-17

Family

ID=6359350

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Application Number Title Priority Date Filing Date
EP19890112999 Expired - Lifetime EP0351741B1 (en) 1988-07-22 1989-07-14 Press for making sheet metal parts in several steps
EP19890907727 Pending EP0425532A1 (en) 1988-07-22 1989-07-14 Press for manufacturing sheet metal preforms in several stages

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19890907727 Pending EP0425532A1 (en) 1988-07-22 1989-07-14 Press for manufacturing sheet metal preforms in several stages

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EP (2) EP0351741B1 (en)
DE (1) DE3824997C1 (en)
WO (1) WO1990000943A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489606B (en) * 2011-12-05 2013-11-27 重庆国际复合材料有限公司 Pre-pressing forming die and method of baseplate of bushing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028520B (en) * 1956-03-09 1958-04-24 Weingarten Ag Maschf Transfer press
DE1246652B (en) * 1962-02-10 1967-08-10 Mueller Fritz Transfer press
GB1250117A (en) * 1969-03-07 1971-10-20
DE2921906C3 (en) * 1979-05-30 1982-02-25 Maschinenfabrik Weingarten Ag, 7987 Weingarten Working procedure for checking and setting the individual tools of a multi-stage press

Also Published As

Publication number Publication date
EP0425532A1 (en) 1991-05-08
EP0351741A1 (en) 1990-01-24
DE3824997C1 (en) 1989-09-28
WO1990000943A1 (en) 1990-02-08

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