EP0734792B1 - Group of universal rolling stands and method for the rolling of continuously cast preliminary sections - Google Patents
Group of universal rolling stands and method for the rolling of continuously cast preliminary sections Download PDFInfo
- Publication number
- EP0734792B1 EP0734792B1 EP96250040A EP96250040A EP0734792B1 EP 0734792 B1 EP0734792 B1 EP 0734792B1 EP 96250040 A EP96250040 A EP 96250040A EP 96250040 A EP96250040 A EP 96250040A EP 0734792 B1 EP0734792 B1 EP 0734792B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- universal
- group
- stand
- compression
- rolling stands
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/14—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a non-continuous process, i.e. at least one reversing stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
- B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
- B21B1/0886—H- or I-sections using variable-width rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B2013/003—Inactive rolling stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/028—Variable-width rolls
Definitions
- the invention relates to a universal stand group for rolling continuously cast Pre-profiles, consisting of one provided on the input side, in reverse operation working first universal scaffolding, a second provided on the output side Universal scaffold and one arranged between these universal scaffolds Compression scaffolding, with the universal scaffolding group one in front of the first universal scaffolding Arranged compression frame is arranged upstream and the outlet-side universal frame as Universal finishing stand is trained.
- a generic universal scaffolding group is from the European patent specification 02 65 757 known. Based on the consideration that otherwise usual heavy Rough stands (break down stands) with a possibly high number of Pre-stitches can be omitted if blocks are not deformed into shaped steel, but Immediately cast profiles are used, the later profile Having approximate cross sections, the prior art provides for a preliminary profile used, which already has reinforcements on both sides of a web and as a "dog-bone" profile referred to as.
- the present invention has therefore set itself the task of the universal scaffolding group with an upstream edging stand for rolling continuously cast profiles improve that without the use of additional scaffolding the uncontrolled Squeeze or close the chamber between the two flanges of the Pre-profile is prevented and thereby the flange height of the pre-cast Pre-profile can be reduced to a greater extent.
- the invention proposes that the Universal scaffolding group upstream of a compression scaffold as a universal scaffold driven vertical rollers and moving horizontal rollers is formed.
- the use of a universal scaffold to compress the pre-profiles prevents this Closing the chamber during the compression of the pre-profile height by the in the Chamber engaging horizontal rollers, while reducing the Flange thickness can be made.
- the introduction of the preliminary profile into the first universal scaffold the universal scaffolding group is no longer a problem; the adjustment of the Pre-profile cross-section at the inlet cross-section of the universal scaffolding group is easy possible.
- the universal compression stand is because only the vertical rollers are driven, pretty easy; the advantages of the scaffold justify its use instead of one Duo upsetting frame or two upsetting frames.
- Another advantage of the invention is that pre-profiles with large headroom and one in relation to it Small web thickness when rolling in the universal compression stand against buckling and Bulges are supported.
- the angle of inclination of the horizontal rollers in the universal compression stand in the area of the angle of inclination Pre-profile flanges or smaller is selected. At such an angle of inclination the engagement and drawing in of the preliminary profile by the rollers of the following The rolling stand is made easier by the flanges being placed outwards.
- the diameter of the horizontal rolls of the universal upsetting stand is preferred smaller than the vertical roller diameter. This measure will The contact area between the horizontal roller and the preliminary profile is kept as small as possible.
- the contour of the horizontal rolls and / or the vertical rolls of the universal upsetting stand cylindrical over the entire width of the roll bale is executed.
- the contour of the roll barrel of the horizontal rolls and / or the vertical rollers of the universal upsetting stand also to the outside variable inclination.
- the vertical rollers will apply the force to the web when compressing the Reinforced pre-profile height; in addition, the introduction of the preliminary profile in the subsequent universal stand improved because the vertical rollers of the universal stand also have a similarly shaped cone.
- the horizontal rollers of the universal compression scaffold in its width to different chamber dimensions are adjustable.
- adjustable rollers are known per se, with them the Adjustment of the roller to different web heights can be made so that the use of the universal compression scaffold can be expanded significantly.
- the adjustment of the width of the horizontal rollers can be done in a simple manner Spacers are changed, is also the adjustment of the Horizontal roller widths possible mechanically or hydraulically.
- the Diameter of the middle roll bale of the horizontal rolls of the Universal upsetting stand made smaller than the diameter of the rolled bale edges is. This measure counteracts the phenomenon that high Upsetting amounts of the pre-profile height between the vertical rolls cause a strong thickening of the web and the resulting high horizontal forces when the web contacts occur with the horizontal rollers.
- the diameter of the middle roll bale of the horizontal rollers is made smaller than the outer edges, so the contact area the horizontal roller with the web of the preliminary profile is reduced.
- the universal compression scaffold can both be in line with the universal scaffolding group be arranged, as well as laterally offset in a parallel rolling line Universal scaffolding group to be upstream.
- a method for rolling finished profiles from a preliminary profile by means of an Reversing operation working universal scaffolding group according to the invention is thereby characterized in that the web height and possibly the flange thickness and / or Web thickness in a first upsetting stitch on the universal upsetting frame and below Use of the first universal scaffold and the subsequent upsetting scaffold in is preferably rolled out three passes and in the following roll pass under Use of the universal and compression scaffold of the universal scaffold group at least one Another upsetting stitch is carried out, to which a finish stitch is made using the entire universal scaffold group.
- the inventive Universal compression stand designated UE in a separate rolling line of the Universal scaffold group is arranged, which consists of the first universal scaffold UR, the Flange upsetting stand HE and the universal finishing stand UF.
- the Universal upset for roughing the preliminary section 1 is driven Vertical rollers 2 and non-driven horizontal rollers 3 and is equipped possibly operated in reverse operation.
- the horizontal rollers 3 by spacers 4 in changeable bale width; the angle of inclination of the flanks 5 of the horizontal rolls are largely adapted to the flank angle 6 of the preliminary profile and hold the Chamber of the preliminary profile 1 also open during the upsetting process, so that the preliminary profile can be easily inserted into the first universal scaffold UR.
- the flanges While the horizontal rollers are closing the chamber during upsetting prevent, the flanges may be reduced in thickness. Height Upsetting amounts can also result in an increase in the web thickness, which counteracts by reducing the web thickness by means of the horizontal rollers becomes.
- the rolling out of the pre-profile pre-rolled in the universal compression stand in the Universal scaffolding group UR, HE, UF takes place in a conventional manner, with the first Universal scaffold UR and subsequent flange compression scaffold HE in several Stitches are rolled reversely with inclined flanges, while in Finishing stand UF in a last rolling pass with simultaneous straightening of the Flanges the finished profile is created.
- FIG. 2 shows an arrangement of the universal compression scaffold in line with the Universal scaffolding group shown and at the same time specified in which sequence the finished profile is rolled.
- the cast pre-profile is recognizable First pre-rolled in the universal upsetting stand UE, whereby flanges and Bar can be reduced.
- the preliminary profile runs immediately into the first Universal scaffold UR and the subsequent flange upsetting scaffold HE is used in a reversing stitch at least in the first universal scaffold UR and in Flange compression frame UE again deformed to reduce in a last stitch in the Universal compression stand UE with subsequent rolling in the first universal stand UR and flange compression stand HE to be rolled on.
- the fourth stitch goes through the universal upset in the open state, i.e. without reduction just under Use of the HE flange flattening stand and the first UR universal stand.
- all scaffolds of the universal scaffolding group UR-HE-UF used to give the profile its final dimensions in the universal finishing stand UF give.
- the universal compression scaffold according to the invention is also a roughing stand for one Contour group consisting of several universal and flange upsetting devices suitable for the rolling of small pre-profiles cast close to the final dimensions can be considered can.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Description
Die Erfindung betrifft eine Universalgerüstgruppe zur Walzung von stranggegossenen Vorprofilen, bestehend aus einem eingangsseitig vorgesehenen, im Reversierbetrieb arbeitenden ersten Universalgerüst, einem ausgangsseitig vorgesehenen zweiten Universalgerüst und einem zwischen diesen Universalgerüsten angeordnetem Stauchgerüst, wobei der Universalgerüstgruppe ein vor dem ersten Universalgerüst angeordnetes Stauchgerüst vorgeordnet ist und das auslaufseitige Universalgerüst als Universal-Fertiggerüst ausgebildet ist.The invention relates to a universal stand group for rolling continuously cast Pre-profiles, consisting of one provided on the input side, in reverse operation working first universal scaffolding, a second provided on the output side Universal scaffold and one arranged between these universal scaffolds Compression scaffolding, with the universal scaffolding group one in front of the first universal scaffolding Arranged compression frame is arranged upstream and the outlet-side universal frame as Universal finishing stand is trained.
Eine gattungsgemäße Universalgerüstgruppe ist aus der europäischen Patentschrift 02 65 757 bekannt. Ausgehend von der Überlegung, daß auf sonst übliche schwere Vorgerüste (break down-Gerüste) mit einer gegebenenfalls hohen Anzahl von Vorstichen verzichtet werden kann, wenn nicht Blöcke zu Formstahl verformt, sondern sofort stranggegossene Profile eingesetzt werden, die dem späteren Profil angenäherte Querschnitte aufweisen, sieht der Stand der Technik vor, ein Vorprofil zu verwendet, das beidseitig eines Steges bereits Verstärkungen aufweist und als "dog-bone"-Profil bezeichnet wird.A generic universal scaffolding group is from the European patent specification 02 65 757 known. Based on the consideration that otherwise usual heavy Rough stands (break down stands) with a possibly high number of Pre-stitches can be omitted if blocks are not deformed into shaped steel, but Immediately cast profiles are used, the later profile Having approximate cross sections, the prior art provides for a preliminary profile used, which already has reinforcements on both sides of a web and as a "dog-bone" profile referred to as.
Es wird vorgeschlagen, solche Profile sofort in das erste Universalgerüst der als Kompaktwalzgruppe zusammengestellten Universalgerüste einzuführen und in mehreren Reversierstichen unter Verwendung beider Universalgerüste und des Stauchgerüstes zu einem Endprofil auszuwalzen. Nur dann, wenn aus dem stranggegossenen Vorprofil Fertigprofile mit bedeutend größeren Endabmessungsunterschieden zu walzen sind, wird ein der Kompaktwalzgruppe vorangestelltes Stauchgerüst in den Walzprozeß einbezogen, das mit Duo-Walzensätzen bestückt, gegebenenfalls reversierend betrieben werden kann. Alternativ kann dem Stauchgerüst mit Duo-Walzen ein zusätzliches Stauchgerüst mit Horizontalwalzen beigeordnet werden.It is suggested that such profiles be immediately integrated into the first universal framework Compact roller group to introduce and put in universal stands several reversing stitches using both universal stands and the Roll out the scaffolding to an end profile. Only if from the Continuously cast pre-profile finished profiles with significantly larger Differences in final dimensions are to be rolled, one of the compact rolling group leading upstand included in the rolling process, that with duo roller sets equipped, can be operated reversing if necessary. Alternatively, the upsetting stand with duo-rollers can be equipped with an additional upsetting stand Horizontal rollers can be assigned.
Es hat sich gezeigt, daß das Einführen der Vorprofile in die Universalgerüstgruppe Probleme bereitet, wenn es beim Stauchen der Vorprofilhöhe an den Trägerenden zu einem verstärkten Zusammendrücken der beiden Flansche des Vorprofils kommt. Die vorliegende Erfindung hat sich deshalb die Aufgabe gestellt, die Universalgerüstgruppe mit vorgeordnetem Stauchgerüst zur Walzung von stranggegossenen Profilen so zu verbessern, daß ohne den Einsatz zusätzlicher Gerüste das unkontrollierte Zusammendrücken oder Schließen der Kammer zwischen den beiden Flanschen des Vorprofiles verhindert wird und dadurch die Flanschhöhe des vorgegossenen Vorprofils in größerem Maße reduziert werden kann.It has been shown that the introduction of the preliminary profiles into the universal scaffolding group Problems arise when it comes to upsetting the pre-profile height at the beam ends an increased compression of the two flanges of the preliminary profile. The The present invention has therefore set itself the task of the universal scaffolding group with an upstream edging stand for rolling continuously cast profiles improve that without the use of additional scaffolding the uncontrolled Squeeze or close the chamber between the two flanges of the Pre-profile is prevented and thereby the flange height of the pre-cast Pre-profile can be reduced to a greater extent.
Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß das der Universalgerüstgruppe vorgeordnete Stauchgerüst als Universalgerüst mit angetriebenen Vertikalwalzen und mitlaufenden Horizontalwalzen ausgebildet ist.To solve the problem, the invention proposes that the Universal scaffolding group upstream of a compression scaffold as a universal scaffold driven vertical rollers and moving horizontal rollers is formed.
Die Verwendung eines Universalgerüstes zum Stauchen der Vorprofile verhindert das Schließen der Kammer während der Stauchung der Vorprofilhöhe durch die in die Kammer eingreifenden Horizontalwalzen, wobei gleichzeitig eine Reduktion der Flanschdicke erfolgen kann. Das Einführen des Vorprofils in das erste Universalgerüst der Universalgerüstgruppe bereitet keine Schwierigkeiten mehr; die Anpassung des Vorprofilquerschnittes an den Einlaufquerschnitt der Universalgerüstgruppe ist leicht möglich. Das Universalstauchgerüst ist, weil nur die Vertikalwalzen angetrieben sind, relativ einfach; die Vorteile des Gerüstes rechtfertigen seinen Einsatz anstatt eines Duo-Stauchgerüstes oder zweier Stauchgerüste. Ein weiterer Vorteil der Erfindung besteht darin, daß Vorprofile mit großen Stehhöhen und einer im Verhältnis dazu geringen Stegdicke beim Walzen im Universalstauchgerüst gegen Ausknicken und Ausbeulen gestützt werden. Ein enges Führen oder eine geringe Reduktion des Vorprofilsteges durch die Horizontalwalzen kann das Ausknicken des Steges verhindern. Andererseits können durch das Anstellen der Horizontalwalzen größere Stauchbeträge in der Vorprofilhöhe in einem Durchgang realisiert werden, wodurch sowohl die Anzahl der benötigten Stiche als auch die Anzahl unterschiedlicher Vorprofilkokillen weiter minimiert werden kann.The use of a universal scaffold to compress the pre-profiles prevents this Closing the chamber during the compression of the pre-profile height by the in the Chamber engaging horizontal rollers, while reducing the Flange thickness can be made. The introduction of the preliminary profile into the first universal scaffold the universal scaffolding group is no longer a problem; the adjustment of the Pre-profile cross-section at the inlet cross-section of the universal scaffolding group is easy possible. The universal compression stand is because only the vertical rollers are driven, pretty easy; the advantages of the scaffold justify its use instead of one Duo upsetting frame or two upsetting frames. Another advantage of the invention is that pre-profiles with large headroom and one in relation to it Small web thickness when rolling in the universal compression stand against buckling and Bulges are supported. A tight lead or a slight reduction in Pre-profile web through the horizontal rollers can buckle the web prevent. On the other hand, by turning the horizontal rollers larger Shrinkage amounts in the pre-profile height can be realized in one pass, whereby both the number of stitches required and the number of different ones Pre-profile molds can be further minimized.
Nach einem weiteren Vorschlag der Erfindung ist vorgesehen, daß der Neigungswinkel der Horizontalwalzen im Universalstauchgerüst im Bereich des Neigungswinkels der Vorprofilflansche oder kleiner gewählt wird. Bei einem solchen Neigungswinkel wird das Eingreifen und Einziehen des Vorprofiles durch die Walzen des nachfolgenden Walzgerüstes erleichtert, indem die Flansche nach außen gestellt sind.According to a further proposal of the invention it is provided that the angle of inclination of the horizontal rollers in the universal compression stand in the area of the angle of inclination Pre-profile flanges or smaller is selected. At such an angle of inclination the engagement and drawing in of the preliminary profile by the rollers of the following The rolling stand is made easier by the flanges being placed outwards.
Vorzugsweise ist der Durchmesser der Horizontalwalzen des Universalstauchgerüstes kleiner als der Vertikalwalzendurchmesser. Durch diese Maßnahme wird die Kontaktfläche zwischen Horizontalwalze und Vorprofil möglichst gering gehalten.The diameter of the horizontal rolls of the universal upsetting stand is preferred smaller than the vertical roller diameter. This measure will The contact area between the horizontal roller and the preliminary profile is kept as small as possible.
Es ist vorgesehen, daß die Kontur der Horizontalwalzen und/oder der Vertikalwalzen des Universalstauchgerüstes über der gesamten Breite des Walzballens zylindrisch ausgeführt ist. Alternativ dazu kann die Kontur des Walzballens der Horizontalwalzen und/oder der Vertikalwalzen des Universalstauchgerüstes auch mit nach außen veränderlicher Neigung versehen sein. Durch den nach außen verjüngenden Konus der Vertikalwalzen wird die Krafteinwirkung auf den Steg beim Stauchen der Vorprofilhöhe verstärkt; zusätzlich wird das Einführen des Vorprofils in das nachfolgende Universalgerüst verbessert, da die Vertikalwalzen des Universalgerüstes ebenfalls einen ähnlich geformten Konus aufweisen.It is contemplated that the contour of the horizontal rolls and / or the vertical rolls of the universal upsetting stand cylindrical over the entire width of the roll bale is executed. Alternatively, the contour of the roll barrel of the horizontal rolls and / or the vertical rollers of the universal upsetting stand also to the outside variable inclination. Through the cone that tapers outwards The vertical rollers will apply the force to the web when compressing the Reinforced pre-profile height; in addition, the introduction of the preliminary profile in the subsequent universal stand improved because the vertical rollers of the universal stand also have a similarly shaped cone.
In einer Weiterbildung der Erfindung wird vorgeschlagen, daß die Horizontalwalzen des Universalstauchgerüstes in ihrer Breite auf unterschiedliche Kammermaße einstellbar sind. Derartig verstellbare Walzen sind an sich bekannt, mit ihnen kann die Anpassung der Walze an unterschiedliche Steghöhen vorgenommen werden, so daß der Einsatz des Universalstauchgerüstes wesentlich erweitert werden kann.In a development of the invention it is proposed that the horizontal rollers of the universal compression scaffold in its width to different chamber dimensions are adjustable. Such adjustable rollers are known per se, with them the Adjustment of the roller to different web heights can be made so that the use of the universal compression scaffold can be expanded significantly.
Die Einstellung der Breite der Horizontalwalzen kann in einfacher Weise durch Abstandsscheiben verändert werden, auch ist die Verstellung der Horizontalwalzenbreite mechanisch oder hydraulisch denkbar. The adjustment of the width of the horizontal rollers can be done in a simple manner Spacers are changed, is also the adjustment of the Horizontal roller widths possible mechanically or hydraulically.
In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, daß der Durchmesser des mittleren Walzballens der Horizontalwalzen des Universalstauchgerüstes kleiner als der Durchmesser der Walzballenränder ausgeführt ist. Durch diese Maßnahme wird der Erscheinung entgegengewirkt, daß durch hohe Stauchbeträge der Vorprofilhöhe zwischen den Vertikalwalzen eine starke Verdickung des Steges und daraus resultierend hohe Horizontalkräfte beim Kontakt des Steges mit den Horizontalwalzen auftreten. Wird der Durchmesser des mittleren Walzballens der Horizontalwalzen kleiner ausgeführt als die Außenränder, so wird die Kontaktfläche der Horizontalwalze mit dem Steg des Vorprofiles verkleinert.In a further embodiment of the invention it is proposed that the Diameter of the middle roll bale of the horizontal rolls of the Universal upsetting stand made smaller than the diameter of the rolled bale edges is. This measure counteracts the phenomenon that high Upsetting amounts of the pre-profile height between the vertical rolls cause a strong thickening of the web and the resulting high horizontal forces when the web contacts occur with the horizontal rollers. The diameter of the middle roll bale of the horizontal rollers is made smaller than the outer edges, so the contact area the horizontal roller with the web of the preliminary profile is reduced.
Das Universalstauchgerüst kann sowohl in Linie mit der Universalgerüstgruppe angeordnet sein, als auch in einer parallelen Walzlinie seitlich versetzt zu der Universalgerüstgruppe vorgeordnet sein.The universal compression scaffold can both be in line with the universal scaffolding group be arranged, as well as laterally offset in a parallel rolling line Universal scaffolding group to be upstream.
Ein Verfahren zum Walzen von Fertigprofilen aus einem Vorprofil mittels einer im Reversierbetrieb arbeitenden erfindungsgemäßen Universalgerüstgruppe ist dadurch gekennzeichnet, daß die Steghöhe und gegebenenfalls die Flanschdicke und/oder Stegdicke in einem ersten Stauchstich auf dem Universalstauchgerüst und unter Verwendung des ersten Universalgerüstes und des nachfolgenden Stauchgerüstes in vorzugsweise drei Durchgängen ausgewalzt wird und im folgenden Walzstich unter Einsatz des Universal- und Stauchgerüstes der Universalgerüstgruppe mindestens ein weiterer Stauchstich durchgeführt wird, an den sich ein Fertigstich unter Einsatz der gesamten Universalgerüstgruppe anschließt.A method for rolling finished profiles from a preliminary profile by means of an Reversing operation working universal scaffolding group according to the invention is thereby characterized in that the web height and possibly the flange thickness and / or Web thickness in a first upsetting stitch on the universal upsetting frame and below Use of the first universal scaffold and the subsequent upsetting scaffold in is preferably rolled out three passes and in the following roll pass under Use of the universal and compression scaffold of the universal scaffold group at least one Another upsetting stitch is carried out, to which a finish stitch is made using the entire universal scaffold group.
Mit der erfindungsgemäßen Universalgerüstgruppe und dem vorgeschlagenen Verfahren zum Betreiben dieser Walzgerüstanordnung ergibt sich ein besonders wirtschaftliches und exaktes Auswalzen von Vorprofilen zu Fertigprofilen, wobei das erfindungsgemäße Universalstauchgerüst der Anpassung der Abmessungen des vorgegossenen Vorprofiles für die Walzung von Trägern und ähnlichen Profilformen in der nachgeordneten Universalgerüstgruppe dient. Ein unkontrolliertes Zusammendrücken oder Schließen der Kammer zwischen den beiden Flanschen des Vorprofils kann auch bei großen Reduktionen nicht auftreten, so daß mit dem Universalstauchgerüst eine problemlose Anpassung auch solcher Vorprofile an die With the universal scaffolding group according to the invention and the proposed A method for operating this roll stand arrangement results in a particular one economical and exact rolling from pre-profiles to finished profiles, whereby Universal upsetting scaffold according to the invention of adapting the dimensions of the pre-cast pre-profile for the rolling of beams and similar profile shapes in serves the subordinate universal scaffolding group. An uncontrolled Squeeze or close the chamber between the two flanges of the Pre-profile can not occur even with large reductions, so that with the Universal upsetting a problem-free adaptation of such pre-profiles to the
Stichfolge der Universalgerüstgruppe vorgenommen werden kann, die sich stark von dem Querschnitt des Fertigprofils unterscheiden.Sequence of the universal scaffolding group can be made, which differs greatly from distinguish the cross-section of the finished profile.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben:An embodiment of the invention is shown in the drawing and will described below:
In Figur 1 ist eine Walzgerüstanordnung dargestellt, bei der das erfindungsgemäße,
mit UE bezeichnete Universalstauchgerüst in einer separaten Walzlinie der
Universalgerüstgruppe vorgeordnet ist, die aus dem ersten Universalgerüst UR, dem
Flanschenstauchgerüst HE und dem Universalfertiggerüst UF besteht. Das
Universalstauchgerüst zum Vorwalzen des Vorprofiles 1 ist mit angetriebenen
Vertikalwalzen 2 und nicht angetriebenen Horizontalwalzen 3 ausgerüstet und wird
ggfs. im Reversierbetrieb betrieben. Wie in der Darstellung der unteren
Zeichnungshälfte erkennbar, sind die Horizontalwalzen 3 durch Abstandsscheiben 4 in
der Ballenbreite veränderbar; die Neigungswinkel der Flanken 5 der Horizontalwalzen
sind dem Flankenwinkel 6 des Vorprofiles weitgehend angepaßt und halten die
Kammer des Vorprofils 1 auch beim Stauchvorgang offen, so daß das Vorprofil
problemlos in das erste Universalgerüst UR eingeführt werden kann. Aus der
Zeichnungsfigur des Universalstauchgerüstes ist ebenfalls erkennbar, daß der
Durchmesser des mittleren Walzballens der Horizontalwalzen 3 kleiner als die
Außenränder ist, so daß die Kontaktfläche der Horizontalwalze mit dem Steg des
Vorprofils 1 geringer wird. Dadurch werden die beim Stauchen des Vorprofils 1 über
die Vertikalwalzen 2 möglicherweise auftretenden Kräfte auf die Horizontalwalzen
minimiert.1 shows a roll stand arrangement in which the inventive
Universal compression stand designated UE in a separate rolling line of the
Universal scaffold group is arranged, which consists of the first universal scaffold UR, the
Flange upsetting stand HE and the universal finishing stand UF. The
Universal upset for roughing the
Während die Horizontalwalzen das Schließen der Kammer während der Stauchung verhindern, werden gegebenenfalls die Flansche in ihrer Dicke reduziert. Hohe Stauchbeträge können dabei auch eine Vergrößerung der Stegdicke zur Folge haben, der durch eine Reduktion der Stegdicke mittels der Horizontalwalzen entgegengewirkt wird.While the horizontal rollers are closing the chamber during upsetting prevent, the flanges may be reduced in thickness. Height Upsetting amounts can also result in an increase in the web thickness, which counteracts by reducing the web thickness by means of the horizontal rollers becomes.
Das Auswalzen des im Universalstauchgerüst vorgewalzten Vorprofils in der Universalgerüstgruppe UR, HE, UF erfolgt in herkömmlicher Weise, wobei im ersten Universalgerüst UR und anschließendem Flanschenstauchgerüst HE in mehreren Stichen reversierend bei schräggestellten Flanschen gewalzt wird, während im Fertiggerüst UF in einem letzten Walzstich bei gleichzeitigem Geradestellen der Flansche das Fertigprofil erstellt wird.The rolling out of the pre-profile pre-rolled in the universal compression stand in the Universal scaffolding group UR, HE, UF takes place in a conventional manner, with the first Universal scaffold UR and subsequent flange compression scaffold HE in several Stitches are rolled reversely with inclined flanges, while in Finishing stand UF in a last rolling pass with simultaneous straightening of the Flanges the finished profile is created.
In der Figur 2 ist eine Anordnung des Universalstauchgerüstes in Linie mit der Universalgerüstgruppe dargestellt und gleichzeitig angegeben, in welcher Stichfolge die Walzung des Fertigprofiles erfolgt. Erkennbar wird das gegossene Vorprofil zunächst im Universalstauchgerüst UE vorgewalzt, wobei gleichzeitig Flansche und Steg reduzierend bearbeitet werden. Das Vorprofil läuft unmittelbar in das erste Universalgerüst UR und das nachfolgende Flanschenstauchgerüst HE ein, wird in einem Reversierstich mindestens im ersten Universalgerüst UR und im Flanschenstauchgerüst UE erneut reduzierend verformt, um in einem letzten Stich im Universalstauchgerüst UE mit anschließender Walzung im ersten Universalgerüst UR und Flanschenstauchgerüst HE weitergewalzt zu werden. Der vierte Stich durchläuft das Universalstauchgerüst im geöffneten Zustand, d.h. ohne Reduktion nur unter Verwendung des Flanschenstauchgerüstes HE und des ersten Universalgerüstes UR. Im letzten Stich werden dann alle Gerüste der Universalgerüstgruppe UR-HE-UF eingesetzt, um im Universalfertiggerüst UF dem Profil seine endgültige Abmessung zu geben.FIG. 2 shows an arrangement of the universal compression scaffold in line with the Universal scaffolding group shown and at the same time specified in which sequence the finished profile is rolled. The cast pre-profile is recognizable First pre-rolled in the universal upsetting stand UE, whereby flanges and Bar can be reduced. The preliminary profile runs immediately into the first Universal scaffold UR and the subsequent flange upsetting scaffold HE is used in a reversing stitch at least in the first universal scaffold UR and in Flange compression frame UE again deformed to reduce in a last stitch in the Universal compression stand UE with subsequent rolling in the first universal stand UR and flange compression stand HE to be rolled on. The fourth stitch goes through the universal upset in the open state, i.e. without reduction just under Use of the HE flange flattening stand and the first UR universal stand. In the last stitch, all scaffolds of the universal scaffolding group UR-HE-UF used to give the profile its final dimensions in the universal finishing stand UF give.
Das erfindungsgemäße Universalstauchgerüst ist auch als Vorgerüst für eine Kontigruppe aus mehreren Universal- und Flanschenstauchgerüsten geeignet, die für das Walzen kleiner endabmessungsnah gegossener Vorprofile in Betracht kommen kann.The universal compression scaffold according to the invention is also a roughing stand for one Contour group consisting of several universal and flange upsetting devices suitable for the rolling of small pre-profiles cast close to the final dimensions can be considered can.
Claims (12)
- Group of universal rolling stands for the rolling of continuously cast preliminary sections (1), consisting of a first universal stand (UR) on the run-in side which operates reversibly, a second universal stand (UF) on the run-out side and a compression stand (HE) between these universal stands, such that a compression stand (UE) positioned before the group of universal rolling stands is located before the first universal stand and the universal stand (UF) on the run-out side is designed as a universal finishing stand,
characterised in that
the compression stand positioned before the group of universal stands (UR-HE-UF) is designed as a universal compression stand (UE) with driven vertical rolls (2) and non-driven horizontal rolls (3). - Group of universal rolling stands according to Claim 1,
characterised in that
the angle of inclination of the horizontal rolls (3) in the universal compression stand (UE) is chosen to be similar to or smaller than the angle of inclination of the flanges of the preliminary section (1). - Group of universal rolling stands according to Claims 1 and 2,
characterised in that
the diameter of the horizontal rolls (3) of the universal compression stand (UE) is smaller than the diameter of the vertical rolls. - Group of universal rolling stands according to Claim 1,
characterised in that
the contour of the horizontal rolls (3) and/or the vertical rolls (2) of the universal compression stand (UE) is cylindrical over the whole width of the roll body. - Group of universal rolling stands according to Claim 1,
characterised in that
the contour of the horizontal rolls (3) and/or the vertical rolls (2) of the universal compression stand (UE) has a inclination varying outwards across the width of the roll body. - Group of universal rolling stands according to Claims 1 to 5,
characterised in that
the horizontal rolls (3) of the universal compression stand (UE) are adjustable in their width to suit different chamber dimensions. - Group of universal rolling stands according to Claim 6,
characterised in that
the width of the horizontal rolls (3) is adjusted by means of spacer discs (4). - Group of universal rolling stands according to Claim 6,
characterised in that
the width of the horizontal rolls (3) is adjusted by mechanical or hydraulic means. - Group of universal rolling stands according to Claims 1 to 8,
characterised in that
the diameter of the roll body at the middle of the horizontal rolls (3) of the universal compression stand (UE) is smaller than at the edges of the roll body. - Group of universal rolling stands according to Claims 1 to 9,
characterised in that
the universal compression stand (UE) is positioned in line with the group of universal rolling stands (UR-HE-UF). - Group of universal rolling stands according to Claims 1 to 9,
characterised in that
the universal compression stand (UE) is positioned before the group of universal rolling stands (UR-HE-UF) in a parallel rolling line displaced sideways relative to the said group. - Process for the rolling of finished sections from a preliminary section by means of a reversing group of universal rolling stands (UR-HE-UF) according to Claims 1 and 11,
characterised in that
the web height and if necessary the flange thickness and/or web thickness are rolled in a first compression pass on the universal compression stand (UE) and using the first universal stand (UR) and the subsequent compression stand (HE), preferably in three transits, and in the following rolling stage at least one further compression pass is carried out using the universal and compression stands (UR-HE), after which a finishing pass is carried out using the whole group of universal rolling stands (UR-HE-UF).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19512931 | 1995-03-30 | ||
DE19512931A DE19512931A1 (en) | 1995-03-30 | 1995-03-30 | Universal stand group and method for rolling continuously cast pre-profiles |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0734792A2 EP0734792A2 (en) | 1996-10-02 |
EP0734792A3 EP0734792A3 (en) | 1997-03-05 |
EP0734792B1 true EP0734792B1 (en) | 1999-11-24 |
Family
ID=7758962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96250040A Expired - Lifetime EP0734792B1 (en) | 1995-03-30 | 1996-02-16 | Group of universal rolling stands and method for the rolling of continuously cast preliminary sections |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0734792B1 (en) |
CN (1) | CN1074690C (en) |
DE (2) | DE19512931A1 (en) |
ES (1) | ES2139308T3 (en) |
TW (1) | TW299254B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19722732A1 (en) * | 1997-05-30 | 1998-12-03 | Schloemann Siemag Ag | Process for rolling steel profiles |
IT1397191B1 (en) * | 2009-12-01 | 2013-01-04 | Siemens Vai Metals Tech Srl | UNIVERSAL REVERSIBLE TRAIN COMPACT FOR THE PRODUCTION OF LARGE MEDIUM PROFILES. |
CN102247981B (en) * | 2011-06-01 | 2013-06-26 | 中冶赛迪工程技术股份有限公司 | Structural steel rolling production line and production process thereof |
CN103071673B (en) * | 2013-02-01 | 2015-12-02 | 中冶赛迪工程技术股份有限公司 | Compact universal vertical steel rail milling method |
US10710130B2 (en) | 2015-03-19 | 2020-07-14 | Nippon Steel Corporation | Method for producing H-shaped steel |
CN105057345B (en) * | 2015-08-21 | 2017-03-22 | 天津市中重科技工程有限公司 | Method for producing H-steel by chopping and rolling slabs with universal mills |
CN106938280B (en) * | 2016-01-01 | 2019-04-26 | 江苏宝强钢结构有限公司 | A kind of flat-rolled roller producing Z-shape steel band |
CN114749933A (en) * | 2022-04-21 | 2022-07-15 | 保定市金桥纺机配件制造有限公司 | Automatic ring rolling machine for cotton carding rack |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US410107A (en) * | 1889-08-27 | Art of rolling flanged beams | ||
DE286488C (en) * | ||||
DE4337555A1 (en) * | 1993-11-04 | 1995-05-11 | Schloemann Siemag Ag | Method for rolling finished profiles from a preliminary profile by means of a roll stand arrangement working in reversing operation |
JPS555169A (en) * | 1978-06-28 | 1980-01-16 | Sumitomo Metal Ind Ltd | Production of beam blank for large h steels from flat bloom and equipment train thereof |
JPS58132305A (en) * | 1982-02-02 | 1983-08-06 | Hitachi Zosen Corp | Rolling method of rough steel ingot for h-shaped steel |
JPS6133701A (en) * | 1984-07-26 | 1986-02-17 | Nippon Kokan Kk <Nkk> | Universal rolling method of h-beam |
DE3636478C2 (en) * | 1986-10-27 | 1996-10-31 | Schloemann Siemag Ag | Process for rolling finished profiles from a preliminary profile |
US5031435A (en) * | 1988-06-16 | 1991-07-16 | Kawasaki Steel Corporation | Adjustable width rolls for rolling mill |
DE4415762A1 (en) * | 1994-04-29 | 1995-11-02 | Mannesmann Ag | Method and device for rolling beams from pre-profiles |
-
1995
- 1995-03-30 DE DE19512931A patent/DE19512931A1/en not_active Withdrawn
-
1996
- 1996-01-11 TW TW085100364A patent/TW299254B/zh active
- 1996-02-16 EP EP96250040A patent/EP0734792B1/en not_active Expired - Lifetime
- 1996-02-16 DE DE59603691T patent/DE59603691D1/en not_active Expired - Lifetime
- 1996-02-16 ES ES96250040T patent/ES2139308T3/en not_active Expired - Lifetime
- 1996-02-29 CN CN96104202A patent/CN1074690C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
TW299254B (en) | 1997-03-01 |
DE59603691D1 (en) | 1999-12-30 |
EP0734792A2 (en) | 1996-10-02 |
EP0734792A3 (en) | 1997-03-05 |
ES2139308T3 (en) | 2000-02-01 |
CN1135381A (en) | 1996-11-13 |
DE19512931A1 (en) | 1996-10-02 |
CN1074690C (en) | 2001-11-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2714485C2 (en) | Process for the hot rolling of double T-beams from rectangular flat material | |
EP0265757B1 (en) | Method and arrangement for rolling continuously cast profiles | |
EP0734792B1 (en) | Group of universal rolling stands and method for the rolling of continuously cast preliminary sections | |
EP0882526B1 (en) | Method and device for preventing or reducing trumpet-shaped widenings on a pipe end by skew rolling of thin-walled pipes | |
DE1960601C3 (en) | Universal rolling mill for rolling rails | |
EP0846503A2 (en) | Method for rolling finished sections from section blanks, by means of reversibly driven arrangements of roll stands | |
EP0653253A1 (en) | Method for rolling finished sections from section blanks by means of a reversibly driven arrangement of roll stands | |
EP0535767A1 (en) | Rolling train for rolling section beams | |
EP0757599B1 (en) | Process and device for rolling beams from preliminary sections | |
DE4417274A1 (en) | Temper rolling various steel qualities in same mill stand | |
DE2529405A1 (en) | METHOD OF PROFILE ROLLING | |
EP0890395A1 (en) | Method for casting and rolling and roll stand arrangement for rolling finished sections (sheet pile profiles) starting from a near net shape casted preliminary section | |
DE2844438A1 (en) | ROLLING MILL FOR ROLLING HEAVY CARRIER PROFILES OR RAILS | |
EP0065533B1 (en) | Method for rolling a u-shaped steel bar or similar and beam-making universal mill train for implementing such method | |
DE3341957A1 (en) | Ribbed concrete reinforcing steel as well as process for its production | |
DE3521949A1 (en) | Method and apparatus for the finish-rolling of sections, in particular I-section beams or rails in a universal stand | |
DE19732444C1 (en) | Prevention of back end losses of hot rolled pipes produced on Assel roll stands | |
DE2524224A1 (en) | METHOD AND DEVICE FOR ROLLING BAR STEEL | |
DE1452077C3 (en) | Method and device for rolling preferably billets | |
DE2462279A1 (en) | PROCESS AND DEVICE FOR MANUFACTURING OCTAGONAL CROSS SECTIONS AS BASE MATERIAL FOR ROLLING ON ANGLED ROLLING MILLS WITH PLANETARY DRIVES | |
DE2819567A1 (en) | ROLLING MILL FOR ROLLING BAR-SHAPED METALLIC GOODS | |
DE355588C (en) | Process for rolling wide and parallel flanged beams | |
DE3816802C2 (en) | Device for the axial adjustment of the rolls of roll stands, in particular for the production of section steel | |
DE1903205A1 (en) | Manufacture of a reinforcing rod for concrete - with high ribs from hot rolled round steel | |
DE2935327A1 (en) | METHOD FOR PRODUCING A CARRIER TUBE FOR A LARGE H-CARRIER |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB IT LU |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE ES FR GB IT LU |
|
17P | Request for examination filed |
Effective date: 19970325 |
|
17Q | First examination report despatched |
Effective date: 19981005 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT LU |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19991124 |
|
REF | Corresponds to: |
Ref document number: 59603691 Country of ref document: DE Date of ref document: 19991230 |
|
ITF | It: translation for a ep patent filed |
Owner name: GUZZI E RAVIZZA S.R.L. |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2139308 Country of ref document: ES Kind code of ref document: T3 |
|
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 |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20030206 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20041029 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20140220 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140219 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20140226 Year of fee payment: 19 Ref country code: IT Payment date: 20140227 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20140218 Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59603691 Country of ref document: DE |
|
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: 20150216 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20150216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150216 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150901 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20160329 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20150217 |