EP0501211B1 - Method of operating an upsetting press - Google Patents
Method of operating an upsetting press Download PDFInfo
- Publication number
- EP0501211B1 EP0501211B1 EP92102140A EP92102140A EP0501211B1 EP 0501211 B1 EP0501211 B1 EP 0501211B1 EP 92102140 A EP92102140 A EP 92102140A EP 92102140 A EP92102140 A EP 92102140A EP 0501211 B1 EP0501211 B1 EP 0501211B1
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- EP
- European Patent Office
- Prior art keywords
- slab
- upsetting
- press
- angle
- rotation
- 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
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- 238000000034 method Methods 0.000 title claims description 9
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000009749 continuous casting Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
Images
Classifications
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- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/02—Special design or construction
- B21J7/18—Forging machines working with die jaws, e.g. pivoted, movable laterally of the forging or pressing direction, e.g. for swaging
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- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/024—Forging or pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/20—Drives for hammers; Transmission means therefor
- B21J7/22—Drives for hammers; Transmission means therefor for power hammers
- B21J7/32—Drives for hammers; Transmission means therefor for power hammers operated by rotary drive, e.g. by electric motor
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- 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
- B21J9/02—Special design or construction
- B21J9/06—Swaging presses; Upsetting presses
Definitions
- the invention relates to a method for operating an upsetting press to reduce the width of a hot slab cast in a continuous casting installation by laterally pressing the slab between the compression tools of the upsetting press that can be moved toward and away from one another by a stroke eccentric, during which the slab moves on a roller table through the upsetting press becomes.
- a method for operating an upsetting press to reduce the width of a hot slab cast in a continuous casting installation by laterally pressing the slab between the compression tools of the upsetting press that can be moved toward and away from one another by a stroke eccentric, during which the slab moves on a roller table through the upsetting press becomes.
- Such a method is e.g. known from EP-A-0 400 385.
- Upsetting presses for reducing the width of hot, continuously cast slabs are known. They are used in order to be able to carry out the most extensive rolling program possible with as few slab widths as possible. It had been shown that the adjustment of adjustable molds in continuous casting plants for the production of slabs of different widths is too slow and too expensive. Furthermore, it had been shown that the lateral upsetting of a hot, continuously cast slab between the rolls of a heavy vertical stand did not in many cases lead to the expected success, since for technical reasons the slab material bulged in the edge area of the slab during upsetting and during the flat rolling at the front end of the slab formed tongue-like areas and fishtail-like areas at the end of the rolled tape.
- the lateral upsetting of a hot slab between the pressing tools of an upsetting press has the advantage that the slab material is compressed up to far to the middle of the slab, as a result of which the edge beads that occur during upsetting rolling are almost completely eliminated and in particular the formation of fish tails at the ends of the slab and thus also at the ends of the hot-rolled strip is significantly lower than with upsetting rolling in a vertical stand.
- the slabs compressed by the upsetting press have an almost rectangular cross section. Due to the well-formed slab ends and the well-formed slab cross-section, less crop scrap is produced in the subsequent rolling mill than before, which increases the output of the entire rolling mill.
- optimally designed slab edges are ensured by upsetting due to the relatively long engagement length of the pressing tools.
- a hot continuously cast slab could be reduced in width by up to 300 mm in just one pass, i.e. the upsetting press represents a highly effective forming stage in front of the hot rolling mill.
- the upsetting press for reducing the width of rolling stock in particular the slab width in hot wide strip roughing mills according to European patent application 0 400 385 A2 (FIG. 1), has tool carriers 2 arranged on both sides of the slab edge and receiving the pressing tools 1 that point towards each other.
- a steering system 4 actuated by a crank mechanism 3 is provided, which can be moved essentially in the direction of the reduction.
- the crank mechanism is arranged in a crankcase 5, which is arranged adjustable in a press frame 6 with respect to the slab width.
- the tool carrier receiving the pressing tool engages essentially in the direction of the slab transport 8 acting feed drive 9.
- the feed drive is designed as a hydraulic piston-cylinder unit which can be moved according to a distance / time function and which, depending on the desired feed size, enables the pressing tool to be synchronized with the moving slab.
- the upsetting press automatically switches to stop-and-go operation. There is no feed for stop-and-go operation, ie the slab rests on the roller table during upsetting. It is only transported from the slab edge when the pressing tools move back.
- the object of the present invention is to expand the operation of such a compression press, in particular to increase the production or throughput of slabs to be compressed with simple means, without the main drive for the crank mechanism actuating the pressing tools or the hydraulic feed drive for the pressing tool carrier in its performance must be increased.
- This object is achieved with the measures of claim 1.
- Claims 2 to 4 each show advantageous developments of the measures according to claim 1.
- the slab in the time phase in which the pressing tools have no contact with the slab edge is accelerated from the predetermined throughput speed and decelerated again to this given throughput speed, the shrinkage decrease possibly being reduced beforehand; the latter in particular if the maximum compressive force would be exceeded in individual cases, e.g. for reasons of deformation resistance (material, temperature, slab thickness, etc.).
- the throughput of the compression press or the production of compressed slabs can be increased up to 50% in a surprisingly simple manner, without the existing design of the compression press having to be changed and without the drive power for the main drive of the lifting eccentric, ie the crank drive , by which the tool carrier including the pressing tools are moved, its performance has to be increased and without the performance of the piston-cylinder unit acting on the tool carrier having to be changed.
- the slab is moved approximately at an angle of rotation of 0 ° to 180 ° of the upsetting stroke eccentric roller table rollers at the specified throughput speed and that the slab is accelerated and decelerated again approximately at an angle of rotation of 180 ° to 360 ° by driver rollers becomes. It is expedient that the slab is accelerated in the angle of rotation of approximately 180 ° to 360 ° of the upsetting stroke eccentric to approximately twice to four times the specified throughput speed and then decelerated to it.
- upsetting tools driven in opposite directions by eccentric shafts are arranged in pressing tool carriers which are guided displaceably in the press frame.
- the press frame is divided into two press frame halves arranged symmetrically to the tool, which are connected to one another via four columns that run parallel to one another and in the direction of compression.
- Devices are arranged on the columns for gradually advancing the workpiece between the upsetting steps and for holding the workpiece during the upsetting process.
- This upsetting press is said to work in stop-and-go mode, the feed path of the workpiece being adjustable by changing the piston paths of the pressure medium cylinders of the devices for gradually advancing the tool. With what measures the throughput performance of this Upsetting press can be increased without changing the drive power is not addressed in this document.
- a slab mold is to be produced with a compression press in a stop-and-go operation, which has a tongue-like extension both at the front end and at the rear end. If the slab thus formed is then rolled out into rolled strip in the hot rolling mill, the beginning and the end of the strip should be able to be wound directly onto a coil without a cropping with a corresponding loss of material being necessary. Measures in which the throughput of a compression press can be increased as simply as possible are not contained in this document.
- a larger through-travel path preferably covers twice the distance as (in the same time unit) in the compression angle up to 180 ° .
- FIG. 2 a diagram for the throughput speed of a slab through the upsetting press.
- the ordinate of the diagram shows the throughput speed8 of the slab, based on a 360 ° rotation of the stroke eccentric of the crank mechanism, from which the pressing tools are pressed laterally against the slab edge and into the slab material.
- the slab is at the predetermined passage speed 1y on the roller table of the upsetting press transported.
- the slab is accelerated briefly to three times the throughput speed 3 times in the time phase in which the pressing tools have no contact with the slab edge, ie in the angle of rotation of approximately 180 ° to 360 ° of the stroke eccentric of the crank mechanism with the aid of driver rollers 10 (FIG. 1) and after reaching the maximum speed, it is immediately braked again until the originally specified throughput speed 1y of the slab is reached again at the end of the 360 ° rotation angle.
- the distance covered by the slab in the acceleration and deceleration phase is approximately twice as large in this so-called "empty phase” (2nd x) as the path (1 x) which the slab travels in the same time unit in the so-called “upsetting phase", within which the slab is compressed by the pressing tools moved by the eccentric of the crank mechanism.
- the slab is accelerated from the given throughput speed and decelerated again to the original throughput speed in the time phase in which the pressing tools have no contact with the edge of the slab, the shrinkage decrease being reduced beforehand, an immediate increase in production can be achieved. without constructive measures having to be carried out on the upsetting press and without the performance of the main drive for the crank drive of the upsetting press or for its hydraulic feed drive having to be increased.
- the acceleration and deceleration of the slab shown in the diagram in the so-called "empty phase" can also take on a different course, which can be optimized for the respective operating conditions.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Forging (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben einer Stauchpresse zur Verringerung der Breite einer in einer Stranggießanlag gegossenen heißen Bramme durch seitliches Pressen der Bramme zwischen den von einem Hubexzenter aufeinander zu und voneinander weg bewegbaren Preßwerkzeugen der Stauchpresse, währenddessen die Bramme auf einem Rollgang durch die Stauchpresse bewegt wird. Ein derartiges Verfahren ist z.B. aus der EP-A-0 400 385 bekannt.The invention relates to a method for operating an upsetting press to reduce the width of a hot slab cast in a continuous casting installation by laterally pressing the slab between the compression tools of the upsetting press that can be moved toward and away from one another by a stroke eccentric, during which the slab moves on a roller table through the upsetting press becomes. Such a method is e.g. known from EP-A-0 400 385.
Stauchpressen zur Verringerung der Breite von heißen stranggegossenen Brammen sind bekannt. Sie werden eingesetzt, um mit möglichst wenigen Brammenbreiten ein möglichst umfangreiches Walzprogramm durchführen zu können. Es hatte sich gezeigt, daß das Anpassen von verstellbaren Kokillen in Stranggießanlagen zum Herstellen von Brammen unterschiedlicher Breite zu langsam erfolgt und zu aufwendig ist. Ferner hatte sich gezeigt, daß das seitliche Stauchen einer heißen stranggegossenen Bramme zwischen den Walzen eines schweren Vertikalgerüstes in vielen Fällen nicht den erwarteten Erfolg gebracht hat, da aus technologischen Gründen das Brammenmaterial sich beim Stauchwalzen im Kantenbereich der Bramme aufwölbte und sich beim Flachwalzen am Vorderende des gewalzten Bandes zungenartige Bereiche und am Ende des gewalzten Bandes fischschwanzartige Bereiche ausbildeten.Upsetting presses for reducing the width of hot, continuously cast slabs are known. They are used in order to be able to carry out the most extensive rolling program possible with as few slab widths as possible. It had been shown that the adjustment of adjustable molds in continuous casting plants for the production of slabs of different widths is too slow and too expensive. Furthermore, it had been shown that the lateral upsetting of a hot, continuously cast slab between the rolls of a heavy vertical stand did not in many cases lead to the expected success, since for technical reasons the slab material bulged in the edge area of the slab during upsetting and during the flat rolling at the front end of the slab formed tongue-like areas and fishtail-like areas at the end of the rolled tape.
Das seitliche Stauchen einer heißen Bramme zwischen den Preßwerkzeugen einer Stauchpresse hat den Vorteil, daß das Brammenmaterial bis weit zur Brammenmitte gestaucht wird, wodurch die beim Stauchwalzen aufgetretenen Kantenwülste fast vollständig entfallen und insbesondere die Fischschwanzbildung an den Brammenenden und damit auch an den Enden des warmgewalzten Bandes deutlich geringer ist als beim Stauchwalzen in einem Vertikalgerüst. Die von der Stauchpresse angestauchten Brammen haben im Ergebnis einen nahezu rechteckigen Querschnitt. Durch die gut ausgebildeten Brammenenden und durch den gut ausgebildeten Brammenquerschnitt fällt in der nachfolgenden Walzstraße weniger Schopfschrott als bisher an, was das Ausbringen der gesamten Walzanlage erhöht. Außerdem werden durch das Stauchpressen infolge der relativ großen Eingriffslänge der Preßwerkzeuge optimal ausgebildete Brammenkanten gewährleistet. So konnte bspw. mit einer aus der europäischen Patentanmeldung 0 400 385 A2 bekannten Stauchpresse in nur einem Durchlauf eine heiße stranggegossene Bramme in der Breite um bis zu 300 mm reduziert werden, d.h. die Stauchpresse stellt eine hochwirksame Umformstufe vor dem Warmwalzwerk dar.The lateral upsetting of a hot slab between the pressing tools of an upsetting press has the advantage that the slab material is compressed up to far to the middle of the slab, as a result of which the edge beads that occur during upsetting rolling are almost completely eliminated and in particular the formation of fish tails at the ends of the slab and thus also at the ends of the hot-rolled strip is significantly lower than with upsetting rolling in a vertical stand. As a result, the slabs compressed by the upsetting press have an almost rectangular cross section. Due to the well-formed slab ends and the well-formed slab cross-section, less crop scrap is produced in the subsequent rolling mill than before, which increases the output of the entire rolling mill. In addition, optimally designed slab edges are ensured by upsetting due to the relatively long engagement length of the pressing tools. For example, with a compression press known from European patent application 0 400 385 A2, a hot continuously cast slab could be reduced in width by up to 300 mm in just one pass, i.e. the upsetting press represents a highly effective forming stage in front of the hot rolling mill.
Die Stauchpresse zur Reduktion der Breite von Walzgut, insbesondere der Brammenbreite in Warmbreitband-Vorstraßen gemäß der europäischen Patentanmeldung 0 400 385 A2 (Fig. 1) hat beidseitig zur Brammenkante angeordnete, die aufeinander zu weisenden Preßwerkzeuge 1 aufnehmende Werkzeugträger 2. Als Reduktionsantrieb für jedes Preßwerkzeug ist ein von einem Kurbeltrieb 3 betätigtes Lenkersystem 4 vorgesehen, welches im wesentlichen in Richtung der Reduktion bewegbar ist. Der Kurbeltrieb ist in einem Kurbelgehäuse 5 angeordnet, welches in einem Pressenrahmen 6 in bezug auf die Brammenbreite anstellbar angeordnet ist. An dem das Preßwerkzeug aufnehmenden Werkzeugträger greift ein im wesentlichen in Richtung des Brammentransports 8 wirkender Vorschubantrieb 9 an. Der Vorschubantrieb ist als eine hydraulische Kolben-Zylinder-Einheit ausgebildet, die nach einer Weg/Zeit-Funktion verfahrbar ist, und die abhängig von der gewünschten Vorschubgröße die Synchronisation des Preßwerkzeugs mit der bewegten Bramme ermöglicht. D.h., daß die Vorschubgröße der Preßwerkzeuge der kontinuierlichen Durchlaufgeschwindigkeit der Bramme durch die Presse optimal angepaßt wird. Bei Vorwahl der Vorschubgeschwindigkeit 0 geht die Stauchpresse automatisch zum Stop-and-Go-Betrieb über. Für den Stop-and-Go-Betrieb entfällt der Vorschub, d.h. während des Stauchpressens ruht die Bramme auf dem Rollgang. Sie wird erst bei der Zurückbewegung der Preßwerkzeuge von der Brammenkante weitertransportiert.The upsetting press for reducing the width of rolling stock, in particular the slab width in hot wide strip roughing mills according to European patent application 0 400 385 A2 (FIG. 1), has
Aufgabe der vorliegenden Erfindung ist es, die Betriebsweise einer solchen Stauchpresse zu erweitern, insbesondere die Produktion bzw. den Durchsatz von zu stauchenden Brammen mit einfachen Mitteln zu erhöhen, ohne daß der Hauptantrieb für den die Preßwerkzeuge betätigenden Kurbeltrieb oder der hydraulische Vorschubantrieb für den Preßwerkzeugträger in seiner Leistung angehoben werden muß. Diese Aufgabe wird mit den Maßnahmen des Patentanspruchs 1 gelöst. Die Patentansprüche 2 bis 4 zeigen jeweils vorteilhafte Weiterbildungen der Maßnahmen nach Anspruch 1.The object of the present invention is to expand the operation of such a compression press, in particular to increase the production or throughput of slabs to be compressed with simple means, without the main drive for the crank mechanism actuating the pressing tools or the hydraulic feed drive for the pressing tool carrier in its performance must be increased. This object is achieved with the measures of
Gemäß den Maßnahmen nach Anspruch 1 wird die Bramme in der Zeitphase, in der die Preßwerkzeuge mit der Brammenkante keinen Kontakt haben, aus der vorgegebenen Durchlaufgeschwindigkeit beschleunigt und auf diese vorgegebene Durchlaufgeschwindigkeit wieder verzögert, wobei zuvor die Stauchabnahme gegebenenfalls vermindert wird; letzteres insbesondere dann, wenn die maximale Stauchkraft in Einzelfällen überschritten werden würde, bspw. aus Gründen des Verformungswiederstandes (Werkstoff, Temperatur, Brammendicke usw.). Mit diesen Maßnahmen kann in überraschend einfacher Weise die Durchsatzleistung der Stauchpresse bzw. die Produktion gestauchter Brammen unmittelbar bis zu 50% gesteigert werden, ohne daß die vorhandene Konstruktion der Stauchpresse geändert werden muß und ohne daß die Antriebsleistung für den Hauptantrieb des Hubexzenters, d.h. des Kurbeltriebs, von dem die Werkzeugträger samt Preßwerkzeuge bewegt werden, in seiner Leistung angehoben werden muß und ohne daß die Leistung der an dem Werkzeugträger angreifenden Kolben-Zylinder-Einheit verändert werden muß.According to the measures according to
Zur Ausgestaltung der Erfindung wird vorgeschlagen, daß die Bramme etwa im Drehwinkel von 0° bis 180° des Stauchhubexzenters von antreibbaren Rollgangsrollen mit der vorgegebenen Durchlaufgeschwindigkeit bewegt wird und daß die Bramme etwa im Drehwinkel von 180° bis 360° von Treiberrollen hochbeschleunigt wird und wieder verzögert wird. Zweckmäßig ist dabei, daß die Bramme im Drehwinkel von etwa 180° bis 360° des Stauchhubexzenters auf ungefähr das Zweifache bis Vierfache der vorgegebenen Durchlaufgeschwindigkeit beschleunigt und anschließend auf diese verzögert wird. Das heißt, daß im Anschluß an die Stauchphase, während der die Preßwerkzeuge an der Brammenkante anliegen und mit der Durchlaufgeschwindigkeit der Bramme synchronisiert sind, in der Leerphase - das ist die Zeitphase, wo die Preßwerkzeuge mit der Brammenkante keinen Kontakt haben - die Bramme mit Hilfe der Treiberrollen kurzfristig auf eine hohe Durchlaufgeschwindigkeit beschleunigt wird und sofort auf die ursprüngliche Durchlaufgeschwindigkeit abgebremst wird.To develop the invention, it is proposed that the slab is moved approximately at an angle of rotation of 0 ° to 180 ° of the upsetting stroke eccentric roller table rollers at the specified throughput speed and that the slab is accelerated and decelerated again approximately at an angle of rotation of 180 ° to 360 ° by driver rollers becomes. It is expedient that the slab is accelerated in the angle of rotation of approximately 180 ° to 360 ° of the upsetting stroke eccentric to approximately twice to four times the specified throughput speed and then decelerated to it. This means that after the upsetting phase, during which the pressing tools rest against the slab edge and are synchronized with the throughput speed of the slab, in the empty phase - this is the time phase when the pressing tools have no contact with the slab edge - the slab with the help the driver roll is accelerated to a high throughput speed for a short time and immediately decelerated to the original throughput speed.
Es ist aus der DE-OS 25 31 591 eine Stauchpresse für das seitliche Stauchen von stranggegossenen Brammen bekannt, wobei die Bramme in der Stauchpresse wiederholt mit gegeneinander bewegten Druckwerkzeugen bearbeitet wird und jedes Werkzeug stets an einer bestimmten Stelle der Brammenlänge angesetzt wird und wobei das Werkzeug dem kontinuierlichen Vorschub der Bramme frei folgen kann. Die Werkzeuge werden bei dieser vorbekannten Stauchpresse so betätigt, daß sie einen verhältnismäßig langsamen Arbeitsgang und einen verhältnismäßig schnellen Leergang ausführen. Eine solche intermittierende Bewegung der Preßwerkzeuge wird als bekannt vorausgesetzt,um die Durchsatzleistung der Stauchpresse in gewissen Grenzen flexibel zu halten. Eine deutliche, rampenartige Erhöhung der Durchsatzleistung einer Stauchpresse ist hierdurch nicht zu erreichen, es sei denn, die Antriebsleistungen werden entsprechend gesteigert.It is known from DE-OS 25 31 591 an upsetting press for the lateral upsetting of continuously cast slabs, the slab being repeatedly processed in the upsetting press with pressure tools moving against one another and each tool always being applied to a specific point on the slab length and the tool can follow the continuous feed of the slab freely. The tools are operated in this prior art compression press so that they perform a relatively slow operation and a relatively fast idle. Such an intermittent movement of the pressing tools is assumed to be known in order to keep the throughput of the upsetting press flexible within certain limits. A clear, ramp-like increase in the throughput of a compression press cannot be achieved in this way, unless the drive power is increased accordingly.
Bei einer anderen Brammenstauchpresse gemäß der DE-OS 39 00 668 werden von Exzenterwellen gegenläufig angetriebene Stauchwerkzeuge in verschiebbar im Pressenrahmen geführten Preßwerkzeugträgern angeordnet. Der Pressenrahmen ist in zwei klappsymmetrisch zum Werkzeug angeordnete Pressenrahmenhälften aufgeteilt, die über vier parallel zueinander und in Stauchrichtung verlaufende Säulen miteinander verbunden sind. An den Säulen sind Einrichtungen zum schrittweisen Vorschieben des Werkstücks zwischen den Stauchschritten und zum Halten des Werkstückes beim Stauchvorgang angeordnet. Diese Stauchpresse soll also im Stop-and-Go-Betrieb arbeiten, wobei der Vorschubweg des Werkstücks durch Veränderung der Kolbenwege der Druckmittelzylinder der Einrichtungen zum schrittweisen Vorschieben des Werkzeugs einstellbar ist. Mit welchen Maßnahmen die Durchsatzleistung dieser Stauchpresse ohne Veränderung der Antriebsleistung gesteigert werden kann, wird in dieser Druckschrift nicht angesprochen.In another slab upsetting press according to DE-OS 39 00 668, upsetting tools driven in opposite directions by eccentric shafts are arranged in pressing tool carriers which are guided displaceably in the press frame. The press frame is divided into two press frame halves arranged symmetrically to the tool, which are connected to one another via four columns that run parallel to one another and in the direction of compression. Devices are arranged on the columns for gradually advancing the workpiece between the upsetting steps and for holding the workpiece during the upsetting process. This upsetting press is said to work in stop-and-go mode, the feed path of the workpiece being adjustable by changing the piston paths of the pressure medium cylinders of the devices for gradually advancing the tool. With what measures the throughput performance of this Upsetting press can be increased without changing the drive power is not addressed in this document.
Ein völlig anderes Verfahren zur Herstellung einer bestimmten Brammenform in einer Stauchpresse wird in der europäischen Patentschrift 0 157 575 vorgeschlagen: Wenn die Preßwerkzeuge der Stauchpresse sich nahe dem hinteren Ende der Bramme befinden, wird die Bramme zur Vorformung des hinteren Endes der Bramme durch die schrägen Ausgangsbereiche der Preßwerkzeuge vorgeschoben, anschließend wird die Bramme zurückgezogen und der verbleibende Bereich der Bramme wird durch die schrägen Eintrittsbereiche des Preßwerkzeugs gepreßt. Hierdurch entsteht an dem hinteren Ende der Bramme eine Art Zunge, wodurch die Fischschwanzbildung am hinteren Ende der Bramme vermieden werden soll. Von einer Produktionssteigerung der Stauchpresse ist in diesem Zusammenhang keine Rede.A completely different process for producing a particular slab shape in an upsetting press is proposed in European Patent Specification 0 157 575: if the pressing tools of the upsetting press are located near the rear end of the slab, the slab is used to preform the rear end of the slab through the sloping exit areas of the pressing tools, then the slab is withdrawn and the remaining area of the slab is pressed through the inclined entry areas of the pressing tool. This creates a kind of tongue at the rear end of the slab, which is to avoid the formation of fish tails at the rear end of the slab. In this context, there is no question of an increase in production of the upsetting press.
Gemäß einer weiteren europäischen Patentanmeldung 0 270 245 A2 soll mit einer Stauchpresse in einem Stop-and-Go-Betrieb eine Brammenform hergestellt werden, die sowohl am vorderen Ende als auch am hinteren Ende eine zungenartige Erweiterung hat. Wenn die so geformte Bramme anschließend in dem Warmwalzwerk zu Walzband ausgewalzt wird, soll der Anfang und das Ende des Bandes unmittelbar auf ein Coil aufgewickelt werden können, ohne daß ein Schopfen mit entsprechendem Materialverlust erforderlich ist. Maßnahmen, auf welche möglichst einfache Art und Weise die Durchsatzleistung einer Stauchpresse gesteigert werden kann, sind in dieser Druckschrift nicht enthalten.According to a further European patent application 0 270 245 A2, a slab mold is to be produced with a compression press in a stop-and-go operation, which has a tongue-like extension both at the front end and at the rear end. If the slab thus formed is then rolled out into rolled strip in the hot rolling mill, the beginning and the end of the strip should be able to be wound directly onto a coil without a cropping with a corresponding loss of material being necessary. Measures in which the throughput of a compression press can be increased as simply as possible are not contained in this document.
Zurückkommend auf die vorliegende Erfindung zur möglichst einfachen Leistungssteigerung einer Stauchpresse wird, die Erfindung weiterbildend vorgeschlagen, daß die im Drehwinkel von etwa 180° bis 360° des Stauchhubexzenters einen größeren Durchlaufweg vorzugsweise die zweifache Wegstrecke zurücklegt wie (in der gleichen Zeiteinheit) im Stauchwinkel bis 180⁰.Coming back to the present invention for the simplest possible increase in performance of an upsetting press, the invention is further developed, that in the rotation angle of about 180 ° to 360 ° of the compression stroke eccentric, a larger through-travel path preferably covers twice the distance as (in the same time unit) in the compression angle up to 180 ° .
Die Erfindung soll anhand eines Diagramms (Figur 2) für die Durchlaufgeschwindigkeit einer Bramme durch die Stauchpresse erläutert werden.The invention is to be explained on the basis of a diagram (FIG. 2) for the throughput speed of a slab through the upsetting press.
Auf der Ordinate des Diagramms ist die Durchlaufgeschwindigkeit8 von der Bramme angezeigt, bezogen auf eine 360° Winkelumdrehung des Hubexzenters des Kurbeltriebs, von dem die Preßwerkzeuge seitlich gegen die Brammenkante und in das Brammenmaterial hineingedrückt werden. In der Zeitphase, in der die Preßwerkzeuge mit der Bramme in Kontakt stehen, und zwar während eines Drehwinkels von etwa 90⁰ innerhalb eines Durchlaufwinkels von 0° bis 180° des Hubexzenters des Kurbeltriebs, wird die Bramme mit der vorgegebenen Durchlaufgeschwindigkeit 1y auf dem Rollgang der Stauchpresse transportiert. Dann wird die Bramme in der Zeitphase, in der die Preßwerkzeuge mit der Brammenkante keinen Kontakt haben, d.h. im Drehwinkel von etwa 180° bis 360° des Hubexzenters des Kurbeltriebs mit Hilfe von Treiberrollen 10 (Figur 1) kurzfristig auf die dreifache Durchlaufgeschwindigkeit 3 x hochbeschleunigt und nach Erreichen der maximalen Geschwindigkeit sofort wieder abgebremst bis am Ende des 360°-Drehwinkels die ursprünglich vorgegebene Durchlaufgeschwindigkeit 1y der Bramme wieder erreicht ist. Der in der Beschleunigungs-und Verzögerungsphase von der Bramme zurückgelegte Weg ist in dieser sogenannten "Leerphase" etwa doppelt so groß (2 x) wie derjenige Weg (1 x), den die Bramme in der gleichen Zeiteinheit in der sogenannten "Stauchphase" zurücklegt, innerhalb der die Bramme von den von dem Exzenter des Kurbeltriebs bewegten Preßwerkzeugen gestaucht wird.The ordinate of the diagram shows the throughput speed8 of the slab, based on a 360 ° rotation of the stroke eccentric of the crank mechanism, from which the pressing tools are pressed laterally against the slab edge and into the slab material. In the time phase in which the pressing tools are in contact with the slab, namely during a rotation angle of approximately 90 ° within a passage angle of 0 ° to 180 ° of the stroke eccentric of the crank mechanism, the slab is at the predetermined passage speed 1y on the roller table of the upsetting press transported. Then the slab is accelerated briefly to three times the
Wird die Bramme also im Sinne der Erfindung in der Zeitphase, in der die Preßwerkzeuge mit der Brammenkante keinen Kontakt haben, aus der vorgegebenen Durchlaufgeschwindigkeit hochbeschleunigt und auf die ursprüngliche Durchlaufgeschwindigkeit wieder verzögert, wobei zuvor die Stauchabnahme gegebenenfalls vermindert wird, wird eine sofortige Produktionssteigerung erreichbar, ohne daß konstruktive Maßnahmen an der Stauchpresse vorgenommen werden müssen und ohne daß die Leistung des Hauptantriebs für den Kurbeltrieb der Stauchpresse oder für deren hydraulischen Vorschubantrieb erhöht werden muß. Die im Diagramm dargestellte Beschleunigung und Verzögerung der Bramme in der sogenannten "Leerphase" kann auch einen anderen Verlauf annehmen, der auf die jeweilig vorliegenden Betriebsbedingungen optimiert sein kann.If, according to the invention, the slab is accelerated from the given throughput speed and decelerated again to the original throughput speed in the time phase in which the pressing tools have no contact with the edge of the slab, the shrinkage decrease being reduced beforehand, an immediate increase in production can be achieved. without constructive measures having to be carried out on the upsetting press and without the performance of the main drive for the crank drive of the upsetting press or for its hydraulic feed drive having to be increased. The acceleration and deceleration of the slab shown in the diagram in the so-called "empty phase" can also take on a different course, which can be optimized for the respective operating conditions.
Claims (4)
- Method for the operation of an upsetting press for the reduction of the width of a hot slab, cast in a continuous casting plant, by lateral pressing of the slab between the press tools of the upsetting press, which are movable one towards the other and one away from the other by a stroke eccentric, whilst the slab is in a given case moved on a roller bed through the upsetting press, characterised thereby, that the slab is accelerated out of the preset speed of passage and again retarded to this in the time phase in which the press tools have no contact with the edge of the slab, wherein the upsetting reduction is prevented previously.
- Method according to claim 1, characterised thereby, that the slab is moved at the preset speed of passage in the angle of rotation of 0° to 180° of the upsetting stroke eccentric with the aid of drivable roller bed rollers and that the slab is accelerated up and again retarded in the angle of rotation of 180° to 360° by driver rollers.
- Method according to claim 1 or 2, characterised thereby, that the slab is accelerated in the angle of rotation of about 0° to 180° of the upsetting stroke eccentric to approximately two to four times the preset speed of passage and subsequently retarded to this.
- Method according to claim 1, 2 or 3, characterised thereby, that the slab traverses a greater passage travel in the angle of rotation of about 180° to 360° of the upsetting stroke eccentric, preferably twice the travel path, than in the upsetting angle to 180°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4106490 | 1991-03-01 | ||
| DE4106490A DE4106490A1 (en) | 1991-03-01 | 1991-03-01 | METHOD FOR OPERATING A SUSPENSION PRESS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0501211A2 EP0501211A2 (en) | 1992-09-02 |
| EP0501211A3 EP0501211A3 (en) | 1992-10-21 |
| EP0501211B1 true EP0501211B1 (en) | 1994-06-15 |
Family
ID=6426199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92102140A Expired - Lifetime EP0501211B1 (en) | 1991-03-01 | 1992-02-08 | Method of operating an upsetting press |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5331833A (en) |
| EP (1) | EP0501211B1 (en) |
| JP (1) | JP3203032B2 (en) |
| KR (1) | KR100216419B1 (en) |
| CN (1) | CN1033146C (en) |
| AT (1) | ATE107202T1 (en) |
| DE (2) | DE4106490A1 (en) |
| ES (1) | ES2055623T3 (en) |
| RU (1) | RU2096114C1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106490A1 (en) * | 1991-03-01 | 1992-09-03 | Schloemann Siemag Ag | METHOD FOR OPERATING A SUSPENSION PRESS |
| EP1473094B1 (en) | 1997-09-16 | 2006-11-22 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus |
| US7137283B2 (en) | 1997-09-16 | 2006-11-21 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
| JP3991127B2 (en) | 1997-09-16 | 2007-10-17 | 株式会社Ｉｈｉ | Sheet thickness reduction method and apparatus |
| CN107795531A (en) * | 2017-11-13 | 2018-03-13 | 邯郸钢铁集团有限责任公司 | A kind of system and its application method for keeping the secondary pressure angle stability hydraulic of chamfering slab |
| CN111745384B (en) * | 2020-07-09 | 2024-12-20 | 威固技术（安徽）有限公司 | An assembly tool for a rubber lifting ear with a metal bracket |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3080782A (en) * | 1958-12-23 | 1963-03-12 | American Can Co | Feeding mechanism |
| US3263884A (en) * | 1964-06-29 | 1966-08-02 | Detroit Gasket And Mfg Company | Strip processing machine |
| FR2316014A1 (en) * | 1974-04-11 | 1977-01-28 | Tadeusz Sendzimir | Continuously cast slabs press forged on all four sides |
| US4078416A (en) * | 1976-10-07 | 1978-03-14 | The Minster Machine Company | Method and apparatus for feeding strip stock into a machine |
| EP0112516B1 (en) * | 1982-12-01 | 1988-05-11 | Hitachi, Ltd. | Press apparatus for reducing slab width |
| JPS60121001A (en) * | 1983-12-02 | 1985-06-28 | Hitachi Ltd | Edging equipment |
| EP0157575B2 (en) * | 1984-03-29 | 1996-04-10 | Kawasaki Steel Corporation | Method for reduction in width of slabs by pressing and press for the same |
| US4653311A (en) * | 1986-01-31 | 1987-03-31 | Avondale Industries, Inc. | Short stroke press with automated feed mechanism |
| JPH0679721B2 (en) * | 1986-12-01 | 1994-10-12 | 川崎製鉄株式会社 | Slab width reduction method |
| DE3837643A1 (en) * | 1988-11-05 | 1990-05-10 | Schloemann Siemag Ag | Upsetting press for the step wise changing of the cross-section of metal bodies in strand form, e.g. slabs |
| JP2593534B2 (en) * | 1988-11-11 | 1997-03-26 | 株式会社日立製作所 | Hot rolling equipment |
| DE3900668C2 (en) * | 1989-01-09 | 2001-01-11 | Mannesmann Ag | Press for the lateral upsetting of workpieces, in particular slab upsetting press |
| DE3917398A1 (en) * | 1989-05-29 | 1990-12-06 | Schloemann Siemag Ag | FLYING PRESS |
| DE4106490A1 (en) * | 1991-03-01 | 1992-09-03 | Schloemann Siemag Ag | METHOD FOR OPERATING A SUSPENSION PRESS |
-
1991
- 1991-03-01 DE DE4106490A patent/DE4106490A1/en not_active Withdrawn
-
1992
- 1992-02-08 ES ES92102140T patent/ES2055623T3/en not_active Expired - Lifetime
- 1992-02-08 DE DE59200233T patent/DE59200233D1/en not_active Expired - Lifetime
- 1992-02-08 EP EP92102140A patent/EP0501211B1/en not_active Expired - Lifetime
- 1992-02-08 AT AT92102140T patent/ATE107202T1/en not_active IP Right Cessation
- 1992-02-21 RU SU925010874A patent/RU2096114C1/en active
- 1992-02-25 KR KR1019920002898A patent/KR100216419B1/en not_active Expired - Fee Related
- 1992-02-27 JP JP04165592A patent/JP3203032B2/en not_active Expired - Fee Related
- 1992-02-29 CN CN92101245A patent/CN1033146C/en not_active Expired - Lifetime
- 1992-03-02 US US07/844,252 patent/US5331833A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033146C (en) | 1996-10-30 |
| EP0501211A2 (en) | 1992-09-02 |
| CN1064424A (en) | 1992-09-16 |
| JPH0663612A (en) | 1994-03-08 |
| JP3203032B2 (en) | 2001-08-27 |
| US5331833A (en) | 1994-07-26 |
| KR920017745A (en) | 1992-10-21 |
| RU2096114C1 (en) | 1997-11-20 |
| DE4106490A1 (en) | 1992-09-03 |
| EP0501211A3 (en) | 1992-10-21 |
| DE59200233D1 (en) | 1994-07-21 |
| KR100216419B1 (en) | 1999-08-16 |
| ES2055623T3 (en) | 1994-08-16 |
| ATE107202T1 (en) | 1994-07-15 |
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