EP1053801B1 - Hydraulic closing-device for the lateral extrusion of workpieces - Google Patents

Hydraulic closing-device for the lateral extrusion of workpieces Download PDF

Info

Publication number
EP1053801B1
EP1053801B1 EP00109492A EP00109492A EP1053801B1 EP 1053801 B1 EP1053801 B1 EP 1053801B1 EP 00109492 A EP00109492 A EP 00109492A EP 00109492 A EP00109492 A EP 00109492A EP 1053801 B1 EP1053801 B1 EP 1053801B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
piston
hydraulic cylinder
die
pressure
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
EP00109492A
Other languages
German (de)
French (fr)
Other versions
EP1053801A3 (en
EP1053801A2 (en
Inventor
Thorsten Dipl.-Ing. Kretz
Klaus Prof. Dr.-Ing. Siegert
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.)
Fgu Forschungsgesellschaft Umformtechnik Mbh
Original Assignee
Fgu Forschungsgesellschaft Umformtechnik Mbh
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 Fgu Forschungsgesellschaft Umformtechnik Mbh filed Critical Fgu Forschungsgesellschaft Umformtechnik Mbh
Publication of EP1053801A2 publication Critical patent/EP1053801A2/en
Publication of EP1053801A3 publication Critical patent/EP1053801A3/en
Application granted granted Critical
Publication of EP1053801B1 publication Critical patent/EP1053801B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure

Definitions

  • the invention relates to a hydraulic locking device for cross extrusion of workpieces, with two relative mutually movable and closable Die halves and two at equal speeds movable relative to the closed die halves Press rams, with a first hydraulic piston on which the first die half is arranged in an axial movable first hydraulic cylinder on which the first Press ram is arranged, and a second Hydraulic pistons in a fixed second Store the pressure medium cylinder so that it can move.
  • a known device for producing a Workpiece by extrusion according to DE-OS 28 19 167 has a fixed lower support plate and upper support plate on a vertically movable press ram is arranged. Are located on the carrier plates opposing stamp, between which a Blank can be picked up. Store on the stamps sliding ring pistons, those of carrier plate-bound Cylinders are surrounded. Pressure chambers formed in it lead to diaphragm accumulators in which oil is compressed Gas is under pressure. Are on the ring piston Arranged die halves.
  • the upper one Carrier plate by means of a press ram without force first drove down until the stamp on the Face of the blank and the matrices together issue.
  • the upper carrier plate then moves under force further down so that the blank is axially compressed and radially into the cavity formed by the matrices is ousted.
  • the ring pistons displace this pressure medium located in the pressure chambers in the Diaphragm accumulator.
  • everyone in the same direction moving piston is halfway there Carrier plate back at half their speed. in the The result is a symmetrically pressed workpiece.
  • a first disadvantage is that the vertical Location of the removal level from that of the loading level different. In addition to a large Tappet travel also requires a lot of energy.
  • the separate setting of the Closing force which has a negative impact on reliability.
  • the invention has for its object a to provide generic device for extrusion, which avoids the disadvantages mentioned above.
  • the hydraulic locking device for cross extrusion of workpieces has two relatively movable and lockable die halves and two at equal speeds relative to the closed ones Die halves movable ram, being a first Hydraulic piston on which the first die half is arranged is in an axially movable first hydraulic cylinder which the first stamp is arranged, and a second Hydraulic pistons in a fixed second Mount the hydraulic cylinder so that it can move.
  • the second die half is fixed in space, during the second press ram attached to the second hydraulic piston is, which in cross extrusion by one of the first Hydraulic piston displaceable pressure medium can be acted upon is.
  • Both hydraulic pistons have the same piston surfaces.
  • the first hydraulic cylinder is attached to a press ram second die arranged on the second hydraulic cylinder. Both hydraulic cylinders are closed via a pressure line connected to a pressure system that can be fed with pressure medium.
  • the invention is based on a Embodiment explained in more detail.
  • the one in the drawing shown device has a vertically movable upper tool half 2 and a fixed lower one Tool half 4 on.
  • the core of the upper tool half 2 forms one Pressure cylinder 6, one as a support plate 8 trained upper end, one of the Support plate 8 downwardly extending jacket 10 and a ring shoulder extending inwards at the lower end Owns 12.
  • A extends in the cylinder axis A.
  • the support plate 8 arranged stamp carrier 14 on which a Ring piston 16 is slidably guided. Between the Support plate 8 and the lying on the annular shoulder 12 Annular piston 16, a pressure chamber 18 is formed.
  • a down Directed stamp 20 At the free underside of the stamp carrier 12 is a down Directed stamp 20 arranged.
  • At the bottom of the Ring piston 16 sits an annular upper die half 22.
  • the support plate 8 is on the top with a vertically movable press ram 24 connected.
  • the core of the lower tool half 4 forms one Pressure cylinder 26, one as a support plate 28 trained lower end, one of the Support plate 28 upwardly extending jacket 30 and a perforated upper end 32 has.
  • Cylinder axis B which is aligned with cylinder axis A, extends a arranged on the support plate 28 Ejector cylinder 34, on which a downward open Pot-shaped piston 36 is slidably guided.
  • a pressure chamber 38 trained between the support plate 28 and the annular piston 36 .
  • Stamp carrier 38 arranged one up directed stamp 40 carries. Coaxial to the opening of the upper end face 32 this carries an annular Die half 42.
  • the pressure chambers 18 and 38 of the two hydraulic cylinders 6 and 26 are connected to each other by a pressure line 44 connected and by a common pressure source 46 am Start with before starting the first use of the device Pressure medium filled. Then the hydraulic works Locking device as a closed system self-sufficient and must can no longer be supplied with pressure medium. Between the Stamp 40 of the lower tool half 4 and the stamp of upper tool half 2 is a cylindrical blank 48 added.
  • the mode of action is as follows:
  • the upper tool half 2 through the press ram 24 drove below, so that the stamp 20 to the first Workpiece 48 and the upper die half 22 to the lower Place die half 42.
  • Tool 2 continues to follow below, the upper punch 20 presses the workpiece 48 against the lower punch 40, while the fixed lower Die half 42 the upper die half 22 from below presses on the annular piston 16 so that the pressure chamber 18th downsized, making part of what is inside Pressure medium via the pressure line 44 into the pressure space 38 of the pressure medium cylinder 26 is displaced.
  • the lower punch 40 moves with the same Speed upwards, with which the upper stamp 20 moved down.
  • the invention was a hydraulic Closing device created at the same Loading and unloading level by a short Ram travel, low energy consumption and safe closing is marked.

Landscapes

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

Abstract

The device has two relatively moveable lockable molds (22,42). The first mold is held on a hydraulic piston (16) moving in a cylinder (6), carrying a first press die (20). The second mold is stationary and positioned on a second hydraulic cylinder (26), the second press die (40) is located on a second hydraulic piston (36). During impact extrusion of a component, the second pisto charged by a pressure medium displaced by the first piston. The first hydraulic cylinder is is positioned on press ram.

Description

Die Erfindung betrifft eine hydraulische Schließvorrichtung zum Querfließpressen von Werkstücken, mit zwei relativ zueinander bewegbaren und miteinander verschließbaren Matrizenhälften und zwei mit gleichen Geschwindigkeiten relativ zu den verschlossenen Matrizenhälften bewegbaren Preßstempeln, wobei ein erster Hydraulikkolben, an dem die erste Matrizenhälfte angeordnet ist, in einem axial bewegbaren ersten Hydraulikzylinder, an dem der erste Preßsstempel angeordnet ist, und ein zweiter Hydraulikkolben in einem raumfesten zweiten Druckmittelzylinder verschiebbar lagern.The invention relates to a hydraulic locking device for cross extrusion of workpieces, with two relative mutually movable and closable Die halves and two at equal speeds movable relative to the closed die halves Press rams, with a first hydraulic piston on which the first die half is arranged in an axial movable first hydraulic cylinder on which the first Press ram is arranged, and a second Hydraulic pistons in a fixed second Store the pressure medium cylinder so that it can move.

Eine bekannte Vorrichtung zur Herstellung eines Werkstückes durch Fließpressen gemäß DE-OS 28 19 167 weist eine raumfeste untere Trägerplatte und obere Trägerplatte auf, die an einem vertikal beweglichen Pressenstößel angeordnet ist. An den Trägerplatten befinden sich gegeneinander gerichtete Stempel, zwischen denen ein Rohteil aufnehmbar ist. Auf den Stempeln lagern verschiebbare Ringkolben, die von trägerplattengebundenen Zylindern umgeben sind. Darin ausgebildete Druckkkammern führen an Membranspeicher, in denen Öl durch komprimiertes Gas unter Druck steht. Auf den Ringkolben sind Matrizenhälften angeordnet.A known device for producing a Workpiece by extrusion according to DE-OS 28 19 167 has a fixed lower support plate and upper support plate on a vertically movable press ram is arranged. Are located on the carrier plates opposing stamp, between which a Blank can be picked up. Store on the stamps sliding ring pistons, those of carrier plate-bound Cylinders are surrounded. Pressure chambers formed in it lead to diaphragm accumulators in which oil is compressed Gas is under pressure. Are on the ring piston Arranged die halves.

Nach dem Einsetzen des Rohlings wird die obere Trägerplatte mittels eines Pressenstößels ohne Kraft zunächst soweit nach unten gefahren, bis die Stempel an den Stirnseiten des Rohlings und die Matrizen aneinander anliegen. Danach fährt die obere Trägerplatte unter Kraft weiter nach unten, so daß der Rohling axial gestaucht und radial in den durch die Matrizen gebildeten Hohlraum verdrängt wird. Gleichzeitig verdrängen die Ringkolben das in den Druckkammern befindliche Druckmittel in die Membranspeicher. Jeder der sich in gleicher Richtung bewegenden Kolben legt dabei den halben Weg der Trägerplatte mit deren halber Geschwindigkeit zurück. Im Ergebnis liegt ein symmetrisch verpreßtes Werkstück vor. Ein erster Nachteil besteht darin, daß sich die vertikale Lage der Entnahmeebene von der der Beschickungsebene unterscheidet. Darüber hinaus ist neben einem großen Stößelweg auch ein hoher Energieaufwand erforderlich. Schließlich bedarf es der separaten Einstellung der Schließkraft, was die Zuverlässigkeit negativ beeinflußt.After inserting the blank, the upper one Carrier plate by means of a press ram without force first drove down until the stamp on the Face of the blank and the matrices together issue. The upper carrier plate then moves under force further down so that the blank is axially compressed and radially into the cavity formed by the matrices is ousted. At the same time, the ring pistons displace this pressure medium located in the pressure chambers in the Diaphragm accumulator. Everyone in the same direction moving piston is halfway there Carrier plate back at half their speed. in the The result is a symmetrically pressed workpiece. A first disadvantage is that the vertical Location of the removal level from that of the loading level different. In addition to a large Tappet travel also requires a lot of energy. Finally, the separate setting of the Closing force, which has a negative impact on reliability.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung zum Fließpressen zu schaffen, die die obengenannten Nachteile vermeidet. The invention has for its object a to provide generic device for extrusion, which avoids the disadvantages mentioned above.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausbildungen ergeben sich aus den Unteransprüchen.According to the invention, this object is achieved through the features of Claim 1 solved. There are advantageous training courses from the subclaims.

Die hydraulische Schließvorrichtung zum Querfließpressen von Werkstücken besitzt zwei relativ zueinander bewegbare und miteinander verschließbare Matriezenhälften und zwei mit gleichen Geschwindigkeiten relativ zu den geschlossenen Matrizenhälften bewegbare Preßstempel, wobei ein erster Hydraulikkolben, an dem die erste Matrizenhälfte angeordnet ist, in einem axial bewegbaren ersten Hydraulikzylinder, an dem der erste Stempel angeordnet ist, und ein zweiter Hydraulikkolben in einem raumfesten zweiten Hydraulikkzylinder verschiebbar lagern. Erfindungsgemäß ist die zweite Matrizenhälfte raumfest angeordnet, während der zweite Preßstempel am zweiten Hydraulikkolben befestigt ist, welcher beim Querfließpressen durch ein vom ersten Hydraulikkolben verdrängbares Druckmittel beaufschlagbar ist.The hydraulic locking device for cross extrusion of workpieces has two relatively movable and lockable die halves and two at equal speeds relative to the closed ones Die halves movable ram, being a first Hydraulic piston on which the first die half is arranged is in an axially movable first hydraulic cylinder which the first stamp is arranged, and a second Hydraulic pistons in a fixed second Mount the hydraulic cylinder so that it can move. According to the invention the second die half is fixed in space, during the second press ram attached to the second hydraulic piston is, which in cross extrusion by one of the first Hydraulic piston displaceable pressure medium can be acted upon is.

Beide Hydraulikkolben weisen gleiche Kolbenflächen auf. Der erste Hydraulikzylinder ist an einem Pressenstößel, die zweite Matrize am zweiten Hydraulikzylinder angeordnet. Beide Hydraulikzylinder sind über eine Druckleitung zu einem mit Druckmittel speisbaren Drucksystem verbunden.Both hydraulic pistons have the same piston surfaces. The first hydraulic cylinder is attached to a press ram second die arranged on the second hydraulic cylinder. Both hydraulic cylinders are closed via a pressure line connected to a pressure system that can be fed with pressure medium.

Befindet sich der erste Preßstempel samt erstem Hydraulikzylinder, in dem der erste Hydraulikkolben samt erster Matrizenhälfte geführt ist, in einer vom zweiten Preßstempel und der zweiten Matrizenhälfte entfernten Einlegeposition, kann auf diesen bzw. in diese ein Rohteil eingelegt werden. Ist dies geschehen, wird der erste Hydraulikzylinder mittels Prerssenstößel kraftfrei in Richtung des zweiten Hydraulikzylinders verfahren, bis der am ersten Hydraulikzylinder befestigte erste Preßstempel am Rohteil und die am ersten Hydraulikkolben des ersten Hydraulikzylinders angeordnete erste Matrizenhälfte an der raumfesten zweiten Matrizenhälfte anliegt. Daraufhin beginnt das eigentliche Querfließpressen, indem sich der erste Hydraulikzylinder unter dem Einfluß einer nunmehr aufgebrachten Preßkraft weiter in Richtung des zweiten Hydraulikzylinders bewegt, wobei

  • der erste Preßstempel das Werkstück axial zu stauchen beginnt,
  • die raumfeste zweite Matrizenhälfte gleichzeitig die am ersten Hydraulikkolben des ersten Hydraulikzylinders angeordnete zweite Matrizenhälfte unter Verdrängung eines unter Druck stehenden Druckmittels in den ersten Hydraulikzylinder hineinzuverdrängen beginnt, und
  • das verdrängte Druckmittel gleichzeitig den am zweiten Hydraulikkolben angeordneten zweiten Preßstempel in Richtung des ersten Preßstempels zu bewegen beginnt.
If the first press ram together with the first hydraulic cylinder, in which the first hydraulic piston including the first die half is guided, is in an insertion position distant from the second press ram and the second die half, a blank can be placed on or in this. Once this has been done, the first hydraulic cylinder is moved force-free in the direction of the second hydraulic cylinder by means of the press ram until the first press ram attached to the first hydraulic cylinder bears against the blank and the first die half arranged on the first hydraulic piston of the first hydraulic cylinder bears against the fixed second die half. Thereupon the actual transverse extrusion begins, in that the first hydraulic cylinder moves further in the direction of the second hydraulic cylinder under the influence of a pressing force now applied, whereby
  • the first ram begins to compress the workpiece axially,
  • the fixed second die half simultaneously begins to displace the second die half arranged on the first hydraulic piston of the first hydraulic cylinder while displacing a pressurized pressure medium into the first hydraulic cylinder, and
  • the displaced pressure medium simultaneously begins to move the second press ram arranged on the second hydraulic piston in the direction of the first press ram.

Bei Aufrechterhaltung der Preßkraft setzt sich das Stauchen des Werkstückes von beiden Seiten her derart fort, daß dessen Werkstoff schließlich in den von beiden Matrizenhälften gebildeten Hohlraum ausweicht. Gleiche Kolbenflächen sichern einen symmetrischen Umformvorgang. Der zweite Preßstempel bewegt sich in bezug auf die raumfeste zweite Matrizenhälfte mit der gleichen Geschwindigkeit, mit der die am ersten Hydraulikkolben angeordnete erste Matrizenhälfte in bezug auf den am ersten Hydraulikzylinder angeordneten ersten Preßstempel verdrängt wird. Aufgrund des Aufeinanderzubewegens zweier beweglicher Preßstempel halbiert sich gegenüber dem Stand der Technik der Stößelweg. Der Systemdruck ist von dem Widerstand abhängig ist, den der zweite Preßstempel erfährt. Die aufgebrachte Schließkraft entspricht immer der erforderlichen Preßkraft. Ein Öffnen der Matrizenhälften ist nicht möglich. Der Energiebedarf entspricht immer der für den Umformprozeß erforderlichen Energie. Energieverluste durch das Aufbringen der Schließkraft werden vermieden.If the press force is maintained, this continues Upsetting the workpiece from both sides that its material eventually in the of both Mold halves formed cavity evades. Same Piston surfaces ensure a symmetrical forming process. The second ram moves with respect to the fixed second die half with the same Speed at which the first hydraulic piston arranged first die half with respect to that on the first Hydraulic cylinder arranged displaced first press ram becomes. Due to the moving together of two movable Press die halved compared to the prior art the pestle path. The system pressure is from the resistance is dependent on which the second press die experiences. The The closing force applied always corresponds to that required pressing force. An opening of the die halves can not. The energy requirement always corresponds to that energy required for the forming process. Loss of energy due to the application of the closing force are avoided.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels näher erläutert. Die in der Zeichnung dargestellte Vorrichtung weist eine vertikal bewegbare obere Werkzeughälfte 2 und eine raumfeste untere Werkzeughälfte 4 auf.The invention is based on a Embodiment explained in more detail. The one in the drawing shown device has a vertically movable upper tool half 2 and a fixed lower one Tool half 4 on.

Den Kern der oberen Werkzeughälfte 2 bildet ein Druckmittelzylinder 6, der eine als Tragplatte 8 ausgebildete obere Stirnseite, einen sich von der Tragplatte 8 nach unten erstreckenden Mantel 10 und eine sich am unteren Ende nach innen erstreckende Ringschulter 12 besitzt. In der Zylinderachse A erstreckt sich ein an der Tragplatte 8 angeordneter Stempelträger 14, auf dem ein Ringkolben 16 verschiebbar geführt ist. Zwischen der Tragplatte 8 und dem auf der Ringschulter 12 aufliegenden Ringkolben 16 ist ein Druckraum 18 ausgebildet. An der freien Unterseite des Stempelträgers 12 ist ein nach unten gerichteter Stempel 20 angeordnet. An der Unterseite des Ringkolbens 16 sitzt eine ringförmige obere Matrizenhälfte 22. Die Tragplatte 8 ist an der Oberseite mit einem vertikal bewegbaren Pressenstößel 24 verbunden.The core of the upper tool half 2 forms one Pressure cylinder 6, one as a support plate 8 trained upper end, one of the Support plate 8 downwardly extending jacket 10 and a ring shoulder extending inwards at the lower end Owns 12. A extends in the cylinder axis A. the support plate 8 arranged stamp carrier 14 on which a Ring piston 16 is slidably guided. Between the Support plate 8 and the lying on the annular shoulder 12 Annular piston 16, a pressure chamber 18 is formed. At the free underside of the stamp carrier 12 is a down Directed stamp 20 arranged. At the bottom of the Ring piston 16 sits an annular upper die half 22. The support plate 8 is on the top with a vertically movable press ram 24 connected.

Den Kern der unteren Werkzeughälfte 4 bildet ein Druckmittelzylinder 26, der eine als Tragplatte 28 ausgebildete untere Stirnseite, einen sich von der Tragplatte 28 nach oben erstreckenden Mantel 30 und eine durchbrochene obere Stirnseite 32 besitzt. In der Zylinderachse B, die mit der Zylinderachse A fluchtet, erstreckt sich ein an der Tragplatte 28 angeordneter Auswerferzylinder 34, auf dem ein nach unten offener topfförmiger Kolben 36 verschiebbar geführt ist. Zwischen der Tragplatte 28 und dem Ringkolben 36 ist ein Druckraum 38 ausgebildet. An der geschlossenen Oberseite des Kolbens 36 ist ein sich in der Zylinderachse B erstreckender und durch die obere Stirnseite 32 hindurchreichender Stempelträger 38 angeordnet, der einen nach oben gerichteten Stempel 40 trägt. Koaxial zur Öffnung der oberen Stirnseite 32 trägt diese eine ringförmige Matrizenhälfte 42.The core of the lower tool half 4 forms one Pressure cylinder 26, one as a support plate 28 trained lower end, one of the Support plate 28 upwardly extending jacket 30 and a perforated upper end 32 has. In the Cylinder axis B, which is aligned with cylinder axis A, extends a arranged on the support plate 28 Ejector cylinder 34, on which a downward open Pot-shaped piston 36 is slidably guided. Between the support plate 28 and the annular piston 36 is a pressure chamber 38 trained. On the closed top of the piston 36 is an extending in the cylinder axis B and through the upper end face 32 Stamp carrier 38 arranged one up directed stamp 40 carries. Coaxial to the opening of the upper end face 32 this carries an annular Die half 42.

Die Druckräume 18 und 38 der beiden Hydraulikzylinder 6 und 26 sind durch eine Druckleitung 44 miteinander verbunden und durch eine gemeinsame Druckquelle 46 am Anfang vor Beginn des ersten Einsatzes der Vorrichtung mit Druckmittel befüllt. Anschließend arbeitet die hydraulische Schließvorrichtung als geschlossenes System autark und muß nicht mehr mit Druckmittel gespeist werden. Zwischen dem Stempel 40 der unteren Werkzeughälfte 4 und dem Stempel der oberen Werkzeughälfte 2 ist ein zylindrisches Rohteil 48 aufgenommen.The pressure chambers 18 and 38 of the two hydraulic cylinders 6 and 26 are connected to each other by a pressure line 44 connected and by a common pressure source 46 am Start with before starting the first use of the device Pressure medium filled. Then the hydraulic works Locking device as a closed system self-sufficient and must can no longer be supplied with pressure medium. Between the Stamp 40 of the lower tool half 4 and the stamp of upper tool half 2 is a cylindrical blank 48 added.

Die Wirkungsweise ist folgende:The mode of action is as follows:

Zum Querfließpressen des eingelegten Werkstückes 48 wird die obere Werkzeughälfte 2 durch den Pressenstößel 24 nach unten gefahren, so daß sich zunächst der Stempel 20 an das Werkstück 48 und die obere Matrizenhälfte 22 an die untere Matrizenhälfte 42 anlegen. Fährt das Werkzeug 2 weiter nach unten, drückt der obere Stempel 20 das Werkstück 48 gegen den unteren Stempel 40, während die raumfeste untere Matrizenhälfte 42 die obere Matrizenhälfte 22 von unten her an den Ringkolben 16 drückt, so daß sich der Druckraum 18 verkleinert, wodurch ein Teil des darin befindlichen Druckmittels über die Druckleitung 44 in den Druckraum 38 des Druckmittelzylinders 26 verdrängt wird. Dadurch wiederum bewegt sich der untere Stempel 40 mit der gleichen Geschwindigkeit nach oben, mit der sich der obere Stempel 20 nach unten bewegt. Durch den Gleichlauf der Stempel in bezug auf die in ihrer räumlichen Lage unveränderten Matrizenhälften erfährt das Werkstück eine symmetrische Umformung, die sich aus axialer Verdichtung und radialer Verdrängung in die von den Matrizenhälften gebildeten Hohlraum zusammensetzt. Nach abgeschlossenem Umformvorgang führt der Pressenstößel 24 die obere Werkzeughälfte 2 wieder nach oben, wobei sich der Ringkolben 16 wieder auf der Ringschulter 12 abstützt und der untere Stempel wieder nach unten fährt. Das Werkstück kann nun in der gleichen Ebene entnommen werden, in der es eingelegt worden ist. Dieser Vorteil kommt vor allem bei automatischer Werkstückhandhabung zum Tragen.For cross extrusion of the inserted workpiece 48 the upper tool half 2 through the press ram 24 drove below, so that the stamp 20 to the first Workpiece 48 and the upper die half 22 to the lower Place die half 42. Tool 2 continues to follow below, the upper punch 20 presses the workpiece 48 against the lower punch 40, while the fixed lower Die half 42 the upper die half 22 from below presses on the annular piston 16 so that the pressure chamber 18th downsized, making part of what is inside Pressure medium via the pressure line 44 into the pressure space 38 of the pressure medium cylinder 26 is displaced. Thereby again the lower punch 40 moves with the same Speed upwards, with which the upper stamp 20 moved down. By synchronizing the stamp in in relation to those unchanged in their spatial position The workpiece experiences a symmetrical half of the die Forming resulting from axial compression and radial Displacement into those formed by the die halves Cavity. After the forming process has been completed the press ram 24 guides the upper tool half 2 up again, with the annular piston 16 opening again the ring shoulder 12 supports and the lower stamp again goes down. The workpiece can now be in the same The level in which it was inserted. This advantage comes especially with automatic Workpiece handling for carrying.

Insgesamt wurde mit der Erfindung eine hydraulische Schließvorrichtung geschaffen, die bei gleicher Beschickungs- und Entnahmeebene durch einen kurzen Stößelweg, geringen Energieverbrauch und sicheres Schließen gekennzeichnet ist.Overall, the invention was a hydraulic Closing device created at the same Loading and unloading level by a short Ram travel, low energy consumption and safe closing is marked.

Claims (5)

  1. A hydraulic closing apparatus for transverse impact extrusion of workpieces, with two die halves (22, 42) which are movably relative with respect to each other and can be closed with each other and with two punches which are movable with the same speeds relative to the closed die halves, with a first hydraulic piston (16), on which the first die half (22) is arranged, being held movably in an axially movable first hydraulic cylinder (6) on which the first punch (20) is arranged and a second hydraulic piston (36) being held in a displaceable manner in a spatially bound second hydraulic cylinder (26), characterized in that the second die half (42) is arranged in a spatially bound manner and the second punch (40) is arranged on the second hydraulic piston (36) which during transverse impact extrusion of the workpiece can be pressurized by a pressure means which can be displaced by the first hydraulic piston (16).
  2. An apparatus as claimed in claim 1, characterized in that the two hydraulic pistons (16, 36) have the same piston surfaces.
  3. An apparatus as claimed in claim 1 or 2, characterized in that the first hydraulic cylinder (6) is arranged on a press ram (24).
  4. An apparatus as claimed in one of the claims 1 to 3, characterized in that the second die half (42) is arranged on the second hydraulic cylinder (26).
  5. An apparatus as claimed in one of the claims 1 to 4, characterized in that the first and second hydraulic cylinder (6, 26) are connected via a pressure line (44) to a pressure system which can be supplied with a pressure medium.
EP00109492A 1999-05-18 2000-05-04 Hydraulic closing-device for the lateral extrusion of workpieces Expired - Lifetime EP1053801B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19922659 1999-05-18
DE19922659A DE19922659B4 (en) 1999-05-18 1999-05-18 Hydraulic closing device for cross extrusion of workpieces

Publications (3)

Publication Number Publication Date
EP1053801A2 EP1053801A2 (en) 2000-11-22
EP1053801A3 EP1053801A3 (en) 2002-05-15
EP1053801B1 true EP1053801B1 (en) 2004-03-03

Family

ID=7908325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109492A Expired - Lifetime EP1053801B1 (en) 1999-05-18 2000-05-04 Hydraulic closing-device for the lateral extrusion of workpieces

Country Status (4)

Country Link
EP (1) EP1053801B1 (en)
AT (1) ATE260721T1 (en)
BR (1) BR0003064A (en)
DE (2) DE19922659B4 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123745C2 (en) * 2001-05-11 2003-07-03 Hatebur Umformmaschinen Ag Rei Hydraulic-mechanical locking device, preferably for cross extrusion
DE10246940C5 (en) * 2002-10-08 2008-07-03 Thyssenkrupp Presta Ag Device for cross-extrusion of workpieces and method for operating such a device
DE102004038292B3 (en) * 2004-08-03 2006-03-30 Hatebur Umformmaschinen Ag Fluid store device for operating fluid has an adjusting device to compensate undesirable changes in volume of fluid
CN112935167B (en) * 2021-03-05 2023-07-14 济南伊斯达自控工程有限公司 Electronic kiln feeding equipment and burning-bearing plate thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617368A5 (en) * 1977-05-06 1980-05-30 Supervis Ets Method for the production of a workpiece by extrusion, application of the method and an apparatus for carrying out the method
JPH0685956B2 (en) * 1987-07-06 1994-11-02 アイダエンジニアリング株式会社 Closure forging device
JPH0275433A (en) * 1988-09-13 1990-03-15 Mitsubishi Heavy Ind Ltd Double acting die set for blocked forging

Also Published As

Publication number Publication date
DE19922659A1 (en) 2000-12-07
ATE260721T1 (en) 2004-03-15
EP1053801A3 (en) 2002-05-15
EP1053801A2 (en) 2000-11-22
DE19922659B4 (en) 2005-02-10
DE50005478D1 (en) 2004-04-08
BR0003064A (en) 2001-01-30

Similar Documents

Publication Publication Date Title
EP0077897B1 (en) Press for making dimensionally stable pressed articles from powdery material
DE2712604C2 (en) Multiple drawing tool for the production of containers in a press
EP0418779A1 (en) Method for manufacture of workpieces by punching, in particular in a precision counter punching tool
CH617368A5 (en) Method for the production of a workpiece by extrusion, application of the method and an apparatus for carrying out the method
DD270505A5 (en) METHOD AND DEVICE FOR CONSTRUCTING A CONTAINER
DE10123745C2 (en) Hydraulic-mechanical locking device, preferably for cross extrusion
EP2335841B1 (en) Method for producing bent elements and tool for same
DE3312539C1 (en) Apparatus for the production of boxless sand casting moulds
DE3133663C2 (en) Method and device for the production of stones provided with a jacket
EP1053801B1 (en) Hydraulic closing-device for the lateral extrusion of workpieces
DE7736038U1 (en) DEVICE FOR PUNCHING AND DEEP DRAWING OF WORKPIECES FROM SHEET METAL OR DGL.
DE3600282A1 (en) PRESS FOR SHAPING A PLATE-SHAPED BLANK BY MEANS OF A LIQUID PRESSURE
DE19962607B4 (en) Tool cassette with resilient die
EP0268894A2 (en) Drawing device for a press
DE10030792C2 (en) Multi-stage press, in particular cross transport press, with hydraulic closing device
DE3045989C2 (en) Form for the production of plates or the like. made of powdered ceramic material
DE3404307C2 (en)
DE19607257C2 (en) Hydraulic sheet metal press
DE3304075C2 (en)
AT58764B (en) Tool for holding workpieces provided with a bore during single or multi-phase machining.
DE19645627A1 (en) Hydraulic press with reduced ram return times
DE2317425C3 (en) Isostatic powder press with several molded parts
DD250425A3 (en) METHOD AND DEVICE FOR CRIMPING THE EDGE ON PEPPER BODIES
DE10031221A1 (en) Plastic deformation method to shape thin plate; involves using device with stamp, external work piece holder that is moved vertically by press element and vertically moving die mould opposite stamp
EP0706844A2 (en) Device for deep-drawing of sheet metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000602

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20040303

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50005478

Country of ref document: DE

Date of ref document: 20040408

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: A. BRAUN, BRAUN, HERITIER, ESCHMANN AG PATENTANWAE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040504

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040531

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040603

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040603

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040614

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20040303

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

BERE Be: lapsed

Owner name: FGU FORSCHUNGSGESELLSCHAFT UMFORMTECHNIK M.B.H.

Effective date: 20040531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EN Fr: translation not filed
26N No opposition filed

Effective date: 20041206

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070425

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20070523

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040803

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: FGU FORSCHUNGSGESELLSCHAFT UMFORMTECHNIK M.B.H.

Free format text: FGU FORSCHUNGSGESELLSCHAFT UMFORMTECHNIK M.B.H.#HOPPENLAUSTRASSE 7#70174 STUTTGART (DE) -TRANSFER TO- FGU FORSCHUNGSGESELLSCHAFT UMFORMTECHNIK M.B.H.#HOPPENLAUSTRASSE 7#70174 STUTTGART (DE)

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081202