EP0694348B1 - Method and press for producing large tubes from metal sheet - Google Patents
Method and press for producing large tubes from metal sheet Download PDFInfo
- Publication number
- EP0694348B1 EP0694348B1 EP95250147A EP95250147A EP0694348B1 EP 0694348 B1 EP0694348 B1 EP 0694348B1 EP 95250147 A EP95250147 A EP 95250147A EP 95250147 A EP95250147 A EP 95250147A EP 0694348 B1 EP0694348 B1 EP 0694348B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- tube
- tools
- bending
- sizing
- 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
Links
- 238000000034 method Methods 0.000 title claims description 19
- 239000002184 metal Substances 0.000 title description 7
- 238000005452 bending Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims 5
- 238000007493 shaping process Methods 0.000 claims 4
- 238000013000 roll bending Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
-
- 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
- B21D37/145—Die storage magazines
Definitions
- the invention relates to a working method for producing large pipes Metal sheets in a large pipe press with a press in which the tools arranged to deform the sheet into a slotted tube, and a press for performing this method according to the preamble of claims 1 and 2 (see e.g. DE-B-1 183 465).
- UOE PROCESS There are essentially three for producing large tubes from sheet metal plates Process in use, namely the UOE PROCESS, the three-roll bending process and the C press process.
- UOE PROCESS one in a sheet press prepared sheet metal fed to a U-press, in which is a preliminary rounding of the sheet. After that the pre-rounded Sheet formed in the O-press.
- the edges are bent so that itself in the later deformation to the slotted tube, the desired tube radius up to Slit extends and is a prerequisite for the circular shape of the welded pipe in the later seam area.
- the edge bending press exists usually made up of two presses on a common base frame are slidably arranged and face each other. On both sides of the Sheet metal plate are the bending tools for the edges.
- the press bars are designed so that a uniform distribution of the pressing forces on the provided press cylinder is ensured, the upper is guided on the press stand, the upper press tools are attached.
- the upper tool forms in connection with the correspondingly designed one Lower the U-shaped down tube to an O-tube, the final one Calibration after welding the gap by a mechanical Expander, i.e. Expansion of the pipe diameter is guaranteed.
- the three-roll bending machine consists of three long rollers, the length of which is limited by the possible support length.
- the two bottom rollers which are smaller in diameter than the top roller, serve as an abutment for the sheet deformed by the top roller, which between Top roller and bottom roller with adjustable back pressure to an O-tube is formed.
- a subsequent straightening and calibration in a straightening and Calibration press or using a mechanical expander is essential.
- the C press is also used to form a pre-bent edge Sheets used for a slotted tube.
- the C press system consists of essentially from two staggered C-presses, which in turn consist of several C-shaped scaffolds that are side by side are arranged.
- Each C-stand is equipped with a tool set that consists of an upper and lower part.
- the upper part of the tool is on a vertically arranged sword that is on the upper part of the frame is attached.
- the lower tool is on a movable table, and usually consists of two arranged longitudinally, in theirs Distance adjustable strips, which act as an abutment for the sheet to be formed serve.
- the sheet formed into an O-tube is also in this process undergo a straightening or calibration process or after welding expand mechanically.
- the object of the present invention is based on the known methods and presses for producing large pipes, finding a working method and a press that is characterized by low investment costs and small space requirements and is therefore also interesting for pipe works where - for example because of lower quantities - large investment costs do not pay off.
- This task is accomplished by a method or by a press with the characteristics of Claim 1 and 2 solved.
- the Adapters can be used, it becomes possible to use the prepared ones Tools can be exchanged and replaced as required without additional ones To have to provide units such as U and O presses or bending presses.
- the manipulator consists of a Change car, which along with the pipe to be formed the tool to be changed laterally out of and into the press is retractable.
- the change car takes the tools from where they come in Waiting positions or can be transported in preparation plants.
- the present invention considerably simplifies large pipe systems, so that even if the press used by appropriate facilities the multifunction must be adjusted, significant savings Investment costs result. The required space is reduced considerably.
- a preferred embodiment of the press is in three Views shown; it consists of the press frame 1, the foundation 2 is fixed and consists of the portals 1a and 1b, which over the longitudinal bars 3rd are interconnected. They are supported on the longitudinal spars Press cylinder 4, the pistons 5 act on the bending beam.
- the lower tool is located on a table 7 in the lower half of the press with abutments 8, which is displaceable transversely to the longitudinal axis of the press and thereby enables the sheet metal edge bending process.
- Fig.1 that is Upper tool designed as a sword 6.
- Fig.2 are calibration and Straightening tools provided.
- the Tools can also be carried out directly as exchangeable trolleys
- the cars are extended via a rail system 10; 12 so that the Tool change can be carried out in the idle times of the press and the availability of the press itself is increased.
- the change carriage with attached tools remains in the press, in this case at least two carriages are required.
- a cart that is suitable for the respective Tool change is inserted into the press.
- Rail system arranged in front of the press so that the each tool can be used quickly and efficiently.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Die Erfindung betrifft ein Arbeitsverfahren zum Herstellen von Großrohren aus
Blechtafeln in einer Großrohrpreßanlage mit einer Presse, in der die Werkzeuge
zum Verformen des Bleches zu einem Schlitzrohr angeordnet sind, sowie eine Presse zur Durchführung dieses Verfahrens gemäß dem Oberbegriff der Ansprüche 1 bzw. 2 (siehe z.B. DE-B-1 183 465).The invention relates to a working method for producing large pipes
Metal sheets in a large pipe press with a press in which the tools
arranged to deform the sheet into a slotted tube, and a press for performing this method according to the preamble of
Zum Herstellen von Großrohren aus Blechplatten sind im wesentlichen drei Verfahren gebräuchlich, nämlich das UOE-VERFAHREN, das Dreiwalzen-Biegeverfahren und das C-Pressenverfahren. Beim UOE-Verfahren wird eine in einer Kantenanbiegepresse vorbereitete Blechtafel einer U-Presse zugeführt, in der ein Vorrunden des Bleches erfolgt. Im Anschluß daran wird das vorgerundete Blech in der O-Presse fertig geformt. Das Anbiegen der Kanten erfolgt, damit sich bei der späteren Verformung zum Schlitzrohr der gewünschte Rohrradius bis zum Schlitz hin erstreckt und ist eine Voraussetzung für die kreisrunde Form des geschweißten Rohres im späteren Nahtbereich. Die Kantenanbiegepresse besteht gewöhnlich aus zwei Pressen, die auf einen gemeinsamen Grundrahmen verschiebbar angeordnet sind und sich gegenüberstehen. Auf beiden Seiten der Blechplatte befinden sich die Anbiegewerkzeuge für die Kanten. Das so vorbereitete Blech gelangt in die U-Presse, die aus einem Pressenständer in Schweißkonstruktion besteht, der in einem Pressenrahmen zusammengefaßt ist. Im Obergurt des Pressenständers sind die Preßzylinder eingesetzt, an deren Preßkolben der obere Preßstempel mit den Preßwerkzeugen angebracht ist. Seitliche Druckrollen und im Unterteil der Presse höhenverstellbar angeordnete Prismen dienen als Widerlager für die Wirkung des oberen Pressenwerkzeuges, um das U-förmige Vorrohr anzubiegen. Das derartig vorgeformte Blech gelangt in die O-Presse, in der eine von der Rohrlänge abhängige Anzahl von Einzelpressen in einer starren Rahmenkonstruktion zusammengefaßt sind. Die Pressenholme sind so ausgebildet, daß eine gleichmäßige Verteilung der Preßkräfte auf die vorgesehenen Preßzylinder gewährleistet ist, wobei an dem oberen Laufholm, der an dem Pressenständer geführt ist, die oberen Pressenwerkzeuge befestigt sind. Das Oberwerkzeug formt in Verbindung mit dem entsprechend gestalteten Unterwerkzeug das U-förmige Vorrohr zu einem O-Rohr, dessen endgültige Kalibrierung nach dem Verschweißen des Spaltes durch einen mechanischen Expander, d.h. Aufweiten des Rohrdurchmessers, gewährleistet wird.There are essentially three for producing large tubes from sheet metal plates Process in use, namely the UOE PROCESS, the three-roll bending process and the C press process. In the UOE process, one in a sheet press prepared sheet metal fed to a U-press, in which is a preliminary rounding of the sheet. After that the pre-rounded Sheet formed in the O-press. The edges are bent so that itself in the later deformation to the slotted tube, the desired tube radius up to Slit extends and is a prerequisite for the circular shape of the welded pipe in the later seam area. The edge bending press exists usually made up of two presses on a common base frame are slidably arranged and face each other. On both sides of the Sheet metal plate are the bending tools for the edges. That so prepared sheet goes into the U-press, which comes in from a press stand Welded construction exists, which is summarized in a press frame. The press cylinders are inserted in the upper flange of the press stand Press plunger the upper press ram is attached with the press tools. Lateral pressure rollers and height-adjustable ones in the lower part of the press Prisms serve as abutments for the action of the upper press tool, to bend the U-shaped down tube. The sheet preformed in this way gets into the O-press, in which a number of individual presses depending on the pipe length are combined in a rigid frame construction. The press bars are designed so that a uniform distribution of the pressing forces on the provided press cylinder is ensured, the upper is guided on the press stand, the upper press tools are attached. The upper tool forms in connection with the correspondingly designed one Lower the U-shaped down tube to an O-tube, the final one Calibration after welding the gap by a mechanical Expander, i.e. Expansion of the pipe diameter is guaranteed.
Beim Drei-Walzenbiegeverfahren werden gleichfalls die Blechkanten außerhalb der Maschine vorgebogen, es sei denn es werden Vier-Walzenblechbiegemaschinen verwendet, in denen auch das Anbiegen vorgenommen werden kann. Die Drei-Walzenbiegemaschine besteht aus drei langen Walzen, deren Länge durch die mögliche Abstützlänge begrenzt ist. Die beiden Unterwalzen, die in ihrem Durchmesser kleiner als die Oberwalze sind, dienen als Widerlager für das durch die Oberwalze verformte Blech, das zwischen Oberwalze und Unterwalzen bei einstellbarem Gegendruck zu einem O-Rohr geformt wird. Ein anschließendes Richten und Kalibrieren in einer Richt- und Kalibrierpresse oder mittels eines mechanischen Expanders ist unumgänglich.In the three-roll bending process, the sheet edges are also outside pre-bent the machine, unless there are four-roll plate bending machines used in which also the bending can be made. The three-roll bending machine consists of three long rollers, the length of which is limited by the possible support length. The two bottom rollers, which are smaller in diameter than the top roller, serve as an abutment for the sheet deformed by the top roller, which between Top roller and bottom roller with adjustable back pressure to an O-tube is formed. A subsequent straightening and calibration in a straightening and Calibration press or using a mechanical expander is essential.
Die C-Presse wird gleichfalls zum Formen eines an den Kanten vorgebogenen Bleches zu einem Schlitzrohr benutzt. Die C-Pressenanlage besteht im wesentlichen aus zwei versetzt gegenüberstehenden C-Pressen, die ihrerseits aus mehreren C-förmig gebauten Gerüsten bestehen, die nebeneinander angeordnet sind. Jedes C-Gerüst ist mit einem Werkzeugsatz ausgerüstet, der aus einem Ober- und Unterteil besteht. Das Werkzeugoberteil befindet sich an einem senkrecht angeordneten Schwert, das am oberen Teil des Rahmens befestigt ist. Das untere Werkzeug befindet sich auf einem beweglichen Tisch, und besteht gewöhnlich aus zwei in Längsrichtung angeordneten, in ihrem Abstand veränderbaren Leisten, die als Widerlager für das zu formende Blech dienen. Das zu einem O-Rohr verformte Blech ist auch bei diesem Verfahren einem Richt- oder Kalibriervorgang zu unterziehen oder nach dem Schweißen mechanisch zu expandieren.The C press is also used to form a pre-bent edge Sheets used for a slotted tube. The C press system consists of essentially from two staggered C-presses, which in turn consist of several C-shaped scaffolds that are side by side are arranged. Each C-stand is equipped with a tool set that consists of an upper and lower part. The upper part of the tool is on a vertically arranged sword that is on the upper part of the frame is attached. The lower tool is on a movable table, and usually consists of two arranged longitudinally, in theirs Distance adjustable strips, which act as an abutment for the sheet to be formed serve. The sheet formed into an O-tube is also in this process undergo a straightening or calibration process or after welding expand mechanically.
Wie die sehr ausführliche Beschreibung der bekannten Verfahren erkennen läßt, sind für die Herstellung eines Großrohres eine Reihe von Arbeitsschritten erforderlich, die in den unterschiedlichsten Aggregaten (Anbiegepresse, U-Presse, O-Presse, Expander, Kalibrierpresse etc.) ausgeführt werden. Eine Großrohrpreßanlage bedeutet somit stets eine erhebliche Investition für ein Rohrwerk, darüber hinaus ist stets ein beachtlicher Platzbedarf für die Installation der Anlagenteile erforderlich.As can be seen from the very detailed description of the known methods, are a series of steps for the production of a large pipe required in the most diverse units (bending press, U-press, O-press, expander, calibration press, etc.). A Large tube press system therefore always means a significant investment for one Pipe works, moreover, is always a considerable space requirement for the installation of the system parts required.
Aufgabe der vorliegenden Erfindung ist es, ausgehend von den bekannten Verfahren und Pressen zur Großrohrherstellung, ein Arbeitsverfahren und eine Presse zu finden, die durch geringe Investitionskosten und geringen Platzbedarf gekennzeichnet ist und damit auch für Rohrwerke interessant ist, bei denen sich - beispielsweise wegen geringerer Stückzahlen - große Investitionskosten nicht rentieren.The object of the present invention is based on the known methods and presses for producing large pipes, finding a working method and a press that is characterized by low investment costs and small space requirements and is therefore also interesting for pipe works where - for example because of lower quantities - large investment costs do not pay off.
Diese Aufgabe wird durch ein Verfahren bzw. durch eine Presse mit den Merkmalen des
Anspruchs 1 bzw. 2 gelöst.This task is accomplished by a method or by a press with the characteristics of
Wenn es gelingt, in ein und demselben Pressengestell alle bekannten Arbeitsschritte durchzuführen, so wird ein Großteil der für zusätzliche Aggregate erforderlichen Investitionskosten erspart. Dabei müssen lediglich Maßnahmen vorgesehen werden, um die zu verwendenden Werkzeuge gegeneinander austauschen zu können, und es müssen Aggregate vorgesehen werden, mit denen die Werkzeuge manipulierbar sind. If it succeeds, all known ones in the same press frame To carry out work steps, much of that for additional aggregates necessary investment costs saved. All you have to do is take measures be provided to counter the tools to be used to be able to exchange, and units must be provided with where the tools can be manipulated.
Durch vereinheitliche Befestigungen für die einzelnen Werkzeuge, wobei die ggf. Adapter Verwendung finden können, wird es möglich, die vorbereiteten Werkzeuge nach Bedarf ein- und auszuwechseln, ohne dafür zusätzliche Aggregate, wie U- und O-Pressen oder Biegepressen vorsehen zu müssen.Through standardized fastenings for the individual tools, the Adapters can be used, it becomes possible to use the prepared ones Tools can be exchanged and replaced as required without additional ones To have to provide units such as U and O presses or bending presses.
Nach einem Merkmal der Erfindung besteht der Manipulator aus einem Wechselwagen, der in Längsrichtung des zu formenden Rohres zusammen mit dem zu wechselnden Werkzeug seitlich aus der Presse heraus und in diese einfahrbar ist. Der Wechselwagen nimmt die Werkzeuge auf, von wo aus diese in Wartepositionen oder in Zurichtbetriebe transportiert werden können.According to a feature of the invention, the manipulator consists of a Change car, which along with the pipe to be formed the tool to be changed laterally out of and into the press is retractable. The change car takes the tools from where they come in Waiting positions or can be transported in preparation plants.
Besonders günstig ist es, wenn nach einem weiteren Merkmal der Erfindung zwei Wechselwagen vorgesehen sind, die abwechselnd einsetzbar sind. Somit können vorbereitete Werkzeuge schnell ausgetauscht werden, wobei - wie bei Walzenwechselaggregaten in Walzwerken bekannt- die Wechselwagen auf einer Querverschiebeeinrichtung angeordnet und in Wechselstellung verbringbar sind und ggf. mit dem jeweiligen Werkzeug in der Presse verbleiben.It is particularly favorable if, according to a further feature of the invention, two Exchange cars are provided, which can be used alternately. So you can prepared tools can be replaced quickly, whereby - as with Roll changing units known in rolling mills - the changing carts on one Transverse displacement device are arranged and can be moved to the change position and possibly remain in the press with the respective tool.
Die vorliegende Erfindung vereinfacht Großrohranlagen erheblich, sodaß sich selbst dann, wenn die verwendete Presse durch entsprechende Einrichtungen den Multifunktionen angepaßt werden muß, noch deutliche Einsparungen an Investitionskosten ergeben. Der erforderliche Platzbedarf reduziert sich erheblich.The present invention considerably simplifies large pipe systems, so that even if the press used by appropriate facilities the multifunction must be adjusted, significant savings Investment costs result. The required space is reduced considerably.
In einer grob schematischen Darstellung ist eine bevorzugte Ausführungsform einer erfindungsgemäßen Presse erkennbar, die nachfolgend beschrieben wird.A roughly schematic representation is a preferred embodiment of a press according to the invention recognizable, which is described below.
Es zeigt
- Fig. 1
- eine bevorzugte Ausführungsform der Presse mit Werkzeugen zum Anbiegen und Vorformen des Großrohres und
- Fig. 2
- eine bevorzugte Ausführungsform der Presse zum Fertigformen und Kalibrieren des Rohres.
- Fig. 1
- a preferred embodiment of the press with tools for bending and preforming the large pipe and
- Fig. 2
- a preferred embodiment of the press for finishing and calibrating the tube.
In den Zeichnungsfiguren ist eine bevorzugte Ausführungsform der Presse jeweils in drei
Ansichten dargestellt; sie besteht aus dem Pressenrahmen 1, der am Fundament
2 befestigt ist und aus den Portalen 1a und 1b besteht, die über Längsholme 3
miteinander verbunden sind. An den Längsholmen stützen sich die
Pressenzylinder 4 ab, deren Kolben 5 auf den Biegebalken wirken.In the drawing figures, a preferred embodiment of the press is in three
Views shown; it consists of the
In der unteren Pressenhälfte befindet sich auf einem Tisch 7 das Unterwerkzeug
mit Widerlagern 8, das quer zur Pressenlängsachse verschiebbar ist und dadurch
den Kantenbiegevorgang der Blechtafel ermöglicht. Durch schrittweises
Einformen der Bleche 9 mit dem Biegeschwert 6 über die Widerlager 8 lassen
sich Schlitzrohre herstellen, die einen nahezu geschlossenen Querschnitt
aufweisen. Nachdem diese Schlitzrohre durch Außen- und IInnenschweißung zu
einem Rundrohr zusammengeschweißt wurden, müssen sie kalibriert und
gerichtet werden. Dazu werden sie der Multifunktionspresse erneut zugeführt.The lower tool is located on a table 7 in the lower half of the press
with
Die für den Biege- und Richtprozeß erfordrlichen Werkzeuge sind auswechselbar
mit dem Biegebalken 15 und dem Tisch 7 verbunden. In Fig.1 ist das
Oberwekzeug als Schwert 6 ausgeführt. In Fig.2 sind Kalibrier- und
Richtwerkzeuge vorgesehen.The tools required for the bending and straightening process are interchangeable
connected to the
Um den Werkzeugwechsel schnell durchführen zu können und damit die
Multifunktionsweise der Presse sicherzustellen, sind Werkzeugwechselwagen
vorgesehen, auf die die erforderlichen Werkzeuge aufgebaut sind, wobei die
Werkzeuge auch direkt als Wechselwagen ausgeführt werden können.Das Ein- und
Ausfahren der Wagen erfolgt über ein Schienensystem 10;12, damit der
Werkzeugwechsel in den Nebenzeiten der Presse durchgeführt werden kann
und die Verfügbarkeit der Presse selbst erhöht wird.In order to be able to carry out the tool change quickly and thus the
Tool changing trolleys are used to ensure the multifunctionality of the press
provided on which the necessary tools are built, the
Tools can also be carried out directly as exchangeable trolleys
The cars are extended via a
Es gibt zwei Möglichkeiten: Der Wechselwagen mit aufgesetzten Werkzeugen verbleibt in der Presse, in diesem Fall sind mindestens zwei Wagen erforderlich. Es kann jedoch auch ein Wagen verwendet werden, der für den jeweiligen Werkzeugwechsel in die Presse eingefahren wird.There are two options: The change carriage with attached tools remains in the press, in this case at least two carriages are required. However, it is also possible to use a cart that is suitable for the respective Tool change is inserted into the press.
Um einen schnellen Werkzeugwechsel vornehmen zu können, ist das Schienensystem vor der Presse so angeordnet, daß durch Querverfahren das jeweilige Wekzeug schnell und effizient eingesetzt werden kann.In order to be able to make a quick tool change, this is Rail system arranged in front of the press so that the each tool can be used quickly and efficiently.
Claims (5)
- Working process for producing large tubes by forming a sheet panel into an open seam tube in a large tube pressing plant with a press, in which the tools for bending, shaping and sizing the tube are disposed,
characterised in that the working steps of bending, shaping, sizing and straightening the tube take place in succession in the same press following the crosswise displacement of the tools required at the time and disposed at the hydraulic units. - Press for carrying out the working process for producing large tubes by forming a sheet panel into an open seam tube in a large tube pressing plant with a press, in which the tools for bending, shaping and sizing the tube are disposed,
characterised in that the tools disposed at the hydraulic units and required at the time for bending, shaping, sizing and for straightening the tube can be displaced by means of a manipulator consisting of at least one changing carriage which can be moved laterally out of and into the press together with the tools to be changed in the longitudinal direction of the tube to be formed. - Press according to Claim 2,
characterised in that two changing carriages (11, 12) can be used alternately. - Press according to Claim 2,
characterised in that the tool changing carriage (11, 12) required at the time remains in the press during the working process. - Press according to Claim 2,
characterised in that the table (7) or the sizing tool (14) is formed as a changing carriage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4426800A DE4426800A1 (en) | 1994-07-25 | 1994-07-25 | Working method and press for producing large tubes from sheet metal |
| DE4426800 | 1994-07-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0694348A1 EP0694348A1 (en) | 1996-01-31 |
| EP0694348B1 true EP0694348B1 (en) | 2000-11-15 |
Family
ID=6524386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95250147A Expired - Lifetime EP0694348B1 (en) | 1994-07-25 | 1995-06-20 | Method and press for producing large tubes from metal sheet |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0694348B1 (en) |
| CZ (1) | CZ289821B6 (en) |
| DE (2) | DE4426800A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017220393A1 (en) * | 2016-06-22 | 2017-12-28 | Theodor Gräbener GmbH & Co. KG | Device for calibrating and straightening hollow components and method with such a device |
| EP3640016A1 (en) * | 2019-08-21 | 2020-04-22 | Primetals Technologies France SAS | Press for metal product and associated method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1183465B (en) * | 1962-02-01 | 1964-12-17 | Siempelkamp Gmbh & Co | Bending tool for the production of cylindrical or conical tubes from flat sheet metal blanks |
| JPS6031568B2 (en) * | 1982-06-28 | 1985-07-23 | 川崎製鉄株式会社 | O press mold changing device |
| JP2844209B2 (en) * | 1989-02-22 | 1999-01-06 | 丸機械工業株式会社 | Mold changing device |
| US5051051A (en) * | 1990-05-16 | 1991-09-24 | Simonsen Iron Works, Inc. | Rack and die mover |
-
1994
- 1994-07-25 DE DE4426800A patent/DE4426800A1/en not_active Withdrawn
-
1995
- 1995-06-20 DE DE59508854T patent/DE59508854D1/en not_active Expired - Fee Related
- 1995-06-20 EP EP95250147A patent/EP0694348B1/en not_active Expired - Lifetime
- 1995-07-14 CZ CZ19951854A patent/CZ289821B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ185495A3 (en) | 1996-04-17 |
| DE4426800A1 (en) | 1996-02-01 |
| DE59508854D1 (en) | 2000-12-21 |
| CZ289821B6 (en) | 2002-04-17 |
| EP0694348A1 (en) | 1996-01-31 |
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