EP0470435A2 - Upsetting press for reducing the width of rolling stock - Google Patents
Upsetting press for reducing the width of rolling stock Download PDFInfo
- Publication number
- EP0470435A2 EP0470435A2 EP91112375A EP91112375A EP0470435A2 EP 0470435 A2 EP0470435 A2 EP 0470435A2 EP 91112375 A EP91112375 A EP 91112375A EP 91112375 A EP91112375 A EP 91112375A EP 0470435 A2 EP0470435 A2 EP 0470435A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting rod
- pressure
- pressure pan
- press according
- slab
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 5
- 239000004519 grease Substances 0.000 claims abstract description 28
- 238000005461 lubrication Methods 0.000 claims abstract description 25
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000000969 carrier Substances 0.000 claims abstract description 6
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
-
- 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
Definitions
- the invention relates to an upsetting press for reducing the width of rolling stock, in particular the slab width in hot wide strip roughing mills, with tool carriers accommodating pressing tools arranged on both sides of the slab edge, which can be moved in the direction of the slab reduction with the aid of a handlebar system actuated by at least one crank mechanism.
- an upsetting press for reducing the width and reducing the thickness of slabs of various widths supplied from a continuous caster is known.
- the upsetting press With the upsetting press, the slab is repeatedly processed with pressure tools moving against one another, the pressure tool being able to freely follow the advance of the slab and the tools being operated in such a way that they perform a relatively slow operation and a relatively fast idle run.
- the upsetting press has a pair of edge processing tools that act vertically on the edges of the slab and means for quickly moving the tools back and forth.
- the tools are held in a tool carrier, which is moved by a crank mechanism, and are articulated to the tool carrier with pivot bolts.
- each pressing tool with the associated tool carrier is moved with the aid of a steering system actuated by a crank mechanism in the direction of reducing the width of the slab, the crank mechanism being arranged in a crankcase.
- the crank mechanism consists of two driven eccentric shafts; A connecting rod is mounted on each eccentric shaft; the connecting rod head is in operative connection with the tool carrier for transmitting the compression forces.
- a feed drive acting essentially in the direction of the slab feed acts on the tool carrier.
- the feed drive is designed as a hydraulic cylinder
- the traversing movement of the hydraulic cylinder can be controlled particularly advantageously in the form of a path-time function so that the synchronization of the movement of the pressing tool with the movement of the slab to be pressed laterally is ensured for any feed size.
- the connecting rod moves through the corresponding control of the feed cylinder only by a fraction of an angular degree and in the empty phase only by a few angular degrees, so that an effective lubricant build-up can be produced in the bearing of the connecting rod head.
- the upsetting press of the aforementioned type is characterized in that the connecting rod head of the crank mechanism is movably mounted in a correspondingly shaped pressure pan of the tool carrier and that the connecting rod head has a sliding bandage with hydrostatic pressure lubrication which corresponds at least to the contact length of the pressure pan.
- the arrangement of the sliding bandage on the connecting rod head is a further prerequisite for the stable lubricating film between the connecting rod head and the pressure pan, because the sliding bandage can be produced with an extremely high surface quality, which is hardly possible with direct machining of the connecting rod head due to its size with conventional machine tools.
- the sliding bandage has approximately equally distributed lubrication pockets on the surface facing the pressure pan, into which grease channels lead through the connecting rod of the crank mechanism.
- the even distribution of the lubrication pockets on the surface of the sliding bandage results in an even supply of lubricant, which is used above all when the connecting rod is relieved of the compression pressure.
- the in this together Menhang as an advantageous proposed permanent pressure generating grease pump presses the lubricating grease through the channels to the lubrication pockets in the pressure-relieved movement phase of the connecting rod with such high pressures that the pressure pan of the tool carrier is lifted from the connecting rod head by differentially small amounts and grease from the lubrication pockets between the sliding bandage and the bearing shell of the pressure pan is pressed flat.
- the lubrication pockets be formed into cruciformly arranged lubrication grooves at least at a contact angle of approximately 45 ° on both sides of a connecting line between the crank drive bearing and the connecting rod bearing.
- the tool carrier is provided with cooling in the area of the pressure pan, so that the viscosity of the grease can be kept under control at predetermined values at the large compression pressures to be expected and at the high operating temperatures, and the The lubricating film is not diluted so much that there is a risk of damage to the thrust bearing shell or sliding bandage. So that the lubricating film cannot be impaired by an insufficient surface treatment of the sliding bandage, it is further proposed that the surface of the sliding bandage facing the pressure pan does not exceed a roughness depth Ra of 0.2 u. This means that a mirror surface should be sanded on the sliding bandage.
- grease lubrication of the connecting rod head of the crank mechanism can be achieved, which can withstand the highest stresses.
- this cooling consists of coolant channels running in a meandering manner in the tool carrier below the pressure bearing shell over its width, with connection openings arranged at one end of the pressure bearing shell for the coolant inlet or for the coolant outlet.
- a computed or experimentally determined storage temperature and thus a certain viscosity of the grease can be exactly maintained.
- An expedient embodiment of the invention provides that devices for collecting and suctioning off the transfer grease are arranged in the end regions of the thrust bearing shell and sliding bandage, that is to say of the grease which slowly escapes between the sliding surfaces during operation. The quantity of the transfer grease is pressed down quantitatively by the grease pump through the grease channels into the sliding pockets and from there - as described above - gets between the sliding surfaces.
- Fig. 1 shows the horizontal section through the overhanging upsetting press 1 for reducing the width of slabs 2 in a hot wide strip roughing mill, the slabs being fed almost continuously from a slab casting plant upstream of the upsetting press but not shown in detail.
- Driver rollers 3, 4 are arranged in front of the upsetting press and behind the upsetting press.
- the slab 2 passes through the slab crushing stand in the with point. 5 provided direction of movement.
- the upsetting press has stands 6.
- a crankcase 9 can be adjusted in the stand of the upsetting press.
- the crankcase is adjusted with the aid of a mechanical adjustment 10.
- a hydraulically acting piston / cylinder construction can also be used as the adjustment device.
- Pressing tools 7 are arranged in tool carriers 8 on both sides of the slab 2.
- the press tool and the tool carrier have one in the normal direction, i.e. Reduction drive 11 acting perpendicular to the slab 2 and a feed drive 12 acting in the tangential direction, that is to say parallel to the slab 2.
- the reduction drive is formed in that each tool carrier 8 with the aid of a steering system actuated by two eccentric shafts 13 and containing two connecting rods 14 essentially in Direction of the slab to be reduced in width is movable.
- the connecting rod head 15 of the connecting rods 14 is movably mounted in a correspondingly shaped pressure pan 16 of the tool carrier 8.
- the connecting rod Head has a sliding bandage 18 with hydrostatic pressure lubrication, which corresponds at least to the contact length of the pressure pan 16.
- the sliding bandage 18 has, on its surface facing the pressure pan 16, approximately equally distributed lubrication pockets 19, into which grease channels 20 lead through the connecting rod of the crank mechanism.
- Grease lines (not shown in more detail) can be connected to the inlet bore 21 of the grease channels 20 and are connected to a permanently pressure-generating grease pump.
- the pressure pan 16 in the tool carrier 8 is provided with a pressure bearing shell 22 made of a bronze-containing material.
- the sliding bandage 18 is connected to the connecting rod head 15 with screws 25 and additionally has an adhesive connection.
- devices 28, 29 are arranged for collecting and sucking off the transfer grease.
- FIG. 3 shows the top view of the unwound sliding bandage 18, on the surface of which there are approximately equally distributed lubrication pockets 19, into which the grease channels 20, which pass through the connecting rod 14 of the crank mechanism 17, open.
- the lubrication pockets are formed into lubrication grooves 30 arranged in a cross shape.
- the measures described above ensure that the highly loaded sliding surfaces between the connecting rod head and the pressure pan of the crank mechanism receive sufficient lubrication even with a small relative movement to one another, the lubricating film thickness of which can be kept between 5 u and 15 u during operation, so that the grease layer is relatively small Values can be diluted. Due to the interaction of the mirror-smooth ground sliding bandage combined with an exact grease dosage and with the controllable grease viscosity through additional water cooling of the pressure pan, a perfectly load-bearing lubricating film between the sliding surfaces can be guaranteed and a low grease consumption can be achieved because these measures reduce the grease's displacement time the sliding surfaces to the collecting device is extended.
Abstract
Description
Die Erfindung betrifft eine Stauchpresse zur Breitenreduktion von Walzgut, insbesondere der Brammenbreite in Warmbreitband-Vorstraßen mit beidseitig zur Brammenkante angeordneten Preßwerkzeuge aufnehmenden Werkzeugträgern, welche mit Hilfe eines von mindestens einem Kurbeltrieb betätigten Lenkersystems in Richtung der Brammenreduktion bewegbar sind.The invention relates to an upsetting press for reducing the width of rolling stock, in particular the slab width in hot wide strip roughing mills, with tool carriers accommodating pressing tools arranged on both sides of the slab edge, which can be moved in the direction of the slab reduction with the aid of a handlebar system actuated by at least one crank mechanism.
Aus der deutschen Offenlegungsschrift 25 31 591 ist eine Stauchpresse zur Breitenverminderung und Dickenverminderung von aus einer Stranggießanlage gelieferten Brammen verschiedener Breite bekannt. Mit der Stauchpresse wird die Bramme wiederholt mit gegeneinander bewegten Druckwerkzeugen bearbeitet, wobei das Druckwerkzeug dem Vorschub der Bramme frei folgen kann und die Werkzeuge so betätigt werden, daß sie einen verhältnismäßig langsamen Arbeitsgang und einen verhältnismäßig schnellen Leergang ausführen. Die Stauchpresse weist ein Paar von Kantenbearbeitungswerkzeugen auf, die senkrecht auf die Kanten der Bramme einwirken sowie Mittel zur schnellen Hin- und Herbewegung der Werkzeuge. Die Werkzeuge sind in einem Werkzeugträger gehalten, der von einem Kurbeltrieb bewegt wird und sind mit Drehbolzen an dem Werkzeugträger angelenkt. Die zur Breitenreduzierung der Bramme erforderlichen Stauchkräfte müssen von der Drehbolzenlagerung auf den Werkzeugträger und auf das Druckwerkzeug übertragen werden. Die entstehenden hohen Reibungskräfte mindern folglich die Arbeitsleistung der Presse und der hohe Verschleiß der Drehbolzen erhöht die Wartungskosten und mindert die Verfügbarkeit nicht nur der Stauchpresse, sondern auch der gesamten Walzstraße, in die die Presse eingebunden ist.From the German laid-
Bei einer fliegenden Stauchpresse gemäß der deutschen Patentanmeldung P 39 17 398.4 sind zur Reduktion der Breite von Brammen in einer Warmbreitband-Vorstraße zu beiden Seiten der Brammenkante Preßwerkzeuge angeordnet, die von Werkzeugträgern aufgenommen sind. Zur Ausbildung eines Reduktionsantriebes wird jedes Preßwerkzeug mit dem zugehörigen Werkzeugträger mit Hilfe eines von einem Kurbeltrieb betätigten Lenkersystems in Richtung der Breitenreduktion der Bramme bewegt, wobei der Kurbeltrieb in einem Kurbelgehäuse angeordnet ist. Der Kurbeltrieb besteht aus zwei angetriebenen Exzenterwellen; auf jeder Exzenterwelle ist ein Pleuel gelagert; dessen Pleuelkopf steht mit dem Werkzeugträger zur Übertragung der Stauchkräfte in Wirkverbindung. Am Werkzeugträger greift ein im wesentlichen in Richtung des Brammenvorschubs wirkender Vorschubantrieb an. Durch diese Maßnahmen wird der Bewegungsablauf der Preßwerkzeuge für das reduzierende Pressen und für das Vorschieben der Preßwerkzeuge voneinander getrennt steuerbar. Falls der Vorschubantrieb als Hydraulikzylinder ausgebildet ist, kann die Verfahrbewegung des Hydraulikzylinders besonders vorteilhaft in Form einer Weg-Zeitfunktion so gesteuert werden, daß für jede beliebige Vorschubgröße die Synchronisation der Bewegung des Preßwerkzeuges mit der Bewegung der seitlich zu pressenden Bramme gewährleistet ist. Während des Preßvorganges bewegt sich der Pleuel durch die entsprechende Steuerung des Vorschubzylinders nur um den Bruchteil eines Winkelgrades und in der Leerphase nur um wenige Winkelgrade, so daß ein wirksamer Schmiermittelaufbau in der Lagerung des Pleuelkopfes herzustellen ist.In a flying upsetting press according to German patent application P 39 17 398.4, pressing tools, which are received by tool carriers, are arranged on both sides of the slab edge in order to reduce the width of slabs in a hot wide strip roughing mill. To form a reduction drive, each pressing tool with the associated tool carrier is moved with the aid of a steering system actuated by a crank mechanism in the direction of reducing the width of the slab, the crank mechanism being arranged in a crankcase. The crank mechanism consists of two driven eccentric shafts; A connecting rod is mounted on each eccentric shaft; the connecting rod head is in operative connection with the tool carrier for transmitting the compression forces. A feed drive acting essentially in the direction of the slab feed acts on the tool carrier. These measures make it possible to control the movement sequence of the pressing tools for the reducing pressing and for advancing the pressing tools separately from one another. If the feed drive is designed as a hydraulic cylinder, the traversing movement of the hydraulic cylinder can be controlled particularly advantageously in the form of a path-time function so that the synchronization of the movement of the pressing tool with the movement of the slab to be pressed laterally is ensured for any feed size. During the pressing process, the connecting rod moves through the corresponding control of the feed cylinder only by a fraction of an angular degree and in the empty phase only by a few angular degrees, so that an effective lubricant build-up can be produced in the bearing of the connecting rod head.
Ausgehend von der Stauchpresse gemäß der Patentanmeldung P 39 17 398.4 ist es die Aufgabe der vorliegenden Erfindung, die Lagerung von Pleuel und Werkzeugträger so auszubilden, daß selbst bei sehr hohen Stauchkräften und geringer Winkelverlagerung des Pleuels eine hochwirksame und zuverlässige Pleuelschmierung gewährleistet ist.Starting from the upsetting press according to patent application P 39 17 398.4, it is the object of the present invention to design the bearing of the connecting rod and tool carrier in such a way that a highly effective and reliable connecting rod lubrication is ensured even with very high upsetting forces and low angular displacement of the connecting rod.
Diese Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst. Die Merkmale der weiteren Patentansprüche 2 bis 9 dienen der weiteren Ausgestaltung der Erfindung.This object is achieved with the features of claim 1. The features of the
Nach Anspruch 1 ist die Stauchpresse der zuvor genannten Gattung dadurch gekennzeichnet, daß der Pleuelkopf des Kurbeltriebes in einer entsprechend ausgeformten Druckpfanne des Werkzeugträgers beweglich gelagert ist und daß der Pleuelkopf eine Gleitbandage mit hydrostatischer Druckschmierung aufweist, die mindestens der Berührungslänge der Druckpfanne entspricht. Mit diesen Maßnahmen wird erreicht, daß selbst bei sehr großen Stauchkräften die Flächenpressungen zwischen Pleuel und Werkzeugträger beherrschbar bleiben und auch bei geringen Winkelbewegungen des Pleuels ein stabiler Schmierfilm gewährleistet ist. Die Anordnung der Gleitbandage am Pleuelkopf ist eine weitere Voraussetzung für den stabilen Schmierfilm zwischen Pleuelkopf und Druckpfanne, denn die Gleitbandage kann mit einer ausgesprochen hohen Oberflächengüte hergestellt werden, was bei einer direkten Bearbeitung des Pleuelkopfs wegen seiner Größe mit herkömmlichen Werkzeugmaschinen kaum noch möglich ist.According to claim 1, the upsetting press of the aforementioned type is characterized in that the connecting rod head of the crank mechanism is movably mounted in a correspondingly shaped pressure pan of the tool carrier and that the connecting rod head has a sliding bandage with hydrostatic pressure lubrication which corresponds at least to the contact length of the pressure pan. With these measures it is achieved that the surface pressures between the connecting rod and the tool carrier remain manageable even with very large compression forces and that a stable lubricating film is ensured even with small angular movements of the connecting rod. The arrangement of the sliding bandage on the connecting rod head is a further prerequisite for the stable lubricating film between the connecting rod head and the pressure pan, because the sliding bandage can be produced with an extremely high surface quality, which is hardly possible with direct machining of the connecting rod head due to its size with conventional machine tools.
Zur vorteilhaften Ausgestaltung der Pleuelschmierung ist ferner vorgesehen, daß die Gleitbandage auf der der Druckpfanne zugewandten Oberfläche etwa gleich verteilte Schmiertaschen aufweist, in welche durch den Pleuel des Kurbeltriebes hindurchgeführte Fettkanäle einmünden. Die Gleichverteilung der Schmiertaschen auf der Oberfläche der Gleitbandage bewirkt eine gleichmäßige Schmiermittelversorgung, die vor allen Dingen dann verstärkt einsetzt, wenn der Pleuel vom Stauchdruck entlastet ist. Die in diesem Zusammenhang als vorteilhaft vorgeschlagene permanenten Druck erzeugende Fettpumpe drückt in der druckentlasteten Bewegungsphase des Pleuels mit derart hohen Drücken das Schmierfett durch die Kanäle zu den Schmiertaschen, daß die Druckpfanne des Werkzeugträgers vom Pleuelkopf um differentiell kleine Beträge abgehoben wird und Schmierfett aus den Schmiertaschen zwischen die Gleitbandage und die Lagerschale der Druckpfanne flächig gedrückt wird. Zur weiteren Verbesserung der Schmiermittelversorgung und Schmiermittelverteilung wird vorgeschlagen, daß zumindest im Druckwinkel von etwa 45° zu beiden Seiten einer Verbindungslinie zwischen Kurbeltrieblager und Pleuelkopflager die Schmiertaschen zu kreuzförmig angeordneten Schmiernuten ausgeformt sind.For an advantageous embodiment of the connecting rod lubrication it is further provided that the sliding bandage has approximately equally distributed lubrication pockets on the surface facing the pressure pan, into which grease channels lead through the connecting rod of the crank mechanism. The even distribution of the lubrication pockets on the surface of the sliding bandage results in an even supply of lubricant, which is used above all when the connecting rod is relieved of the compression pressure. The in this together Menhang as an advantageous proposed permanent pressure generating grease pump presses the lubricating grease through the channels to the lubrication pockets in the pressure-relieved movement phase of the connecting rod with such high pressures that the pressure pan of the tool carrier is lifted from the connecting rod head by differentially small amounts and grease from the lubrication pockets between the sliding bandage and the bearing shell of the pressure pan is pressed flat. To further improve the lubricant supply and lubricant distribution, it is proposed that the lubrication pockets be formed into cruciformly arranged lubrication grooves at least at a contact angle of approximately 45 ° on both sides of a connecting line between the crank drive bearing and the connecting rod bearing.
Gemäß einer weiteren Ausgestaltung der Pleuelschmierung des Kurbeltriebes ist vorgesehen, daß der Werkzeugträger im Bereich der Druckpfanne mit einer Kühlung versehen ist, so daß die Viskosität des Schmierfettes bei den großen zu erwartenden Stauchdrücken und bei den hohen Betriebstemperaturen auf vorbestimmten Werten kontrolliert gehalten werden kann und der Schmierfilm nicht so weit verdünnt wird, daß die Gefahr von Beschädigungen von Drucklagerschale bzw. Gleitbandage besteht. Damit der Schmierfilm nicht durch eine unzureichende Oberflächenbearbeitung der Gleitbandage beeinträchtigt werden kann, wird weiterhin vorgeschlagen, daß die der Druckpfanne zugewandte Oberfläche der Gleitbandage eine Rauhtiefe Ra von 0,2 u nicht überschreitet. Dies bedeutet, daß auf der Gleitbandage eine Spiegeloberfläche aufgeschliffen werden sollte. In Verbindung mit einer Drucklagerschale aus Bronze für die Druckpfanne des Werkzeugträgers und der zuvor erwähnten Kühlung der Druckpfanne kann eine Fettschmierung des Pleuelkopfs des Kurbeltriebes erreicht werden, die höchsten Beanspruchungen gewachsen ist.According to a further embodiment of the connecting rod lubrication of the crank mechanism, it is provided that the tool carrier is provided with cooling in the area of the pressure pan, so that the viscosity of the grease can be kept under control at predetermined values at the large compression pressures to be expected and at the high operating temperatures, and the The lubricating film is not diluted so much that there is a risk of damage to the thrust bearing shell or sliding bandage. So that the lubricating film cannot be impaired by an insufficient surface treatment of the sliding bandage, it is further proposed that the surface of the sliding bandage facing the pressure pan does not exceed a roughness depth Ra of 0.2 u. This means that a mirror surface should be sanded on the sliding bandage. In conjunction with a bronze pressure bearing shell for the pressure pan of the tool holder and the aforementioned cooling of the pressure pan, grease lubrication of the connecting rod head of the crank mechanism can be achieved, which can withstand the highest stresses.
Damit die Druckpfannenkühlung über die gesamte Berührungsfläche von Druckpfanne und Pleuelkopf besonders wirksam werden kann, besteht diese Kühlung aus im Werkzeugträger unterhalb der Drucklagerschale über deren Breite mäanderartig verlaufenden Kühlmittelkanälen mit an jeweils einem Ende der Drucklagerschale angeordneten Anschlußöffnungen für den Kühlmitteleintritt bzw. für den Kühlmittelaustritt. Durch entsprechende Steuerung des Kühlmitteldurchflusses läßt sich eine rechnerisch oder experimentell zuvor bestimmte Lagertemperatur und damit eine bestimmte Viskosität des Schmierfettes genau einhalten. Eine zweckmäßige Ausgestaltung der Erfindung sieht vor, daß in den Endbereichen von Drucklagerschale und Gleitbandage Einrichtungen zum Sammeln und Absaugen des Übertrittfetts angeordnet sind, also desjenigen Fetts, welches während des Betriebes zwischen den Gleitflächen langsam nach außen dringt. Die Menge des Übertrittfetts wird von der Fettpumpe durch die Fettkanäle in die Gleittaschen quantitativ nachgedrückt und gelangt von dort aus - wie zuvor beschrieben - zwischen die Gleitflächen.So that the pressure pan cooling can be particularly effective over the entire contact area of the pressure pan and connecting rod head, this cooling consists of coolant channels running in a meandering manner in the tool carrier below the pressure bearing shell over its width, with connection openings arranged at one end of the pressure bearing shell for the coolant inlet or for the coolant outlet. By appropriately controlling the coolant flow, a computed or experimentally determined storage temperature and thus a certain viscosity of the grease can be exactly maintained. An expedient embodiment of the invention provides that devices for collecting and suctioning off the transfer grease are arranged in the end regions of the thrust bearing shell and sliding bandage, that is to say of the grease which slowly escapes between the sliding surfaces during operation. The quantity of the transfer grease is pressed down quantitatively by the grease pump through the grease channels into the sliding pockets and from there - as described above - gets between the sliding surfaces.
Die Pleuelschmierung gemäß der vorliegenden Erfindung wird nachfolgend anhand von Ausführungsbeispielen näher beschrieben. Es zeigen
- Figur 1 einen Horizontalschnitt durch eine Stauchpresse,
Figur 2 den Pleuelkopf mit Gleitbandage und die gekühlte Druckpfanne im Werkzeugträger, in stark vergrößerter Darstellung,Figur 3 die Draufsicht auf die abgewickelte Gleitbandage.
- FIG. 1 shows a horizontal section through an upsetting press,
- FIG. 2 the connecting rod head with sliding bandage and the cooled pressure pan in the tool carrier, in a greatly enlarged illustration,
- Figure 3 is a top view of the unwound sliding bandage.
Fig. 1 zeigt den Horizontalschnitt durch die fliegend arbeitende Stauchpresse 1 zur Reduktion der Breite von Brammen 2 in einer Warmbreitband-Vorstraße, wobei die Brammen nahezu kontinuierlich von einer der Stauchpresse vorgeschalteten, jedoch nicht näher dargestellten Brammengießanlage zugeführt werden. Vor der Stauchpresse und hinter der Stauchpresse sind Treiberrollen 3, 4 angeordnet. Die Bramme 2 durchläuft das Brammenstauchgerüst in der mit Ziff. 5 versehenen Bewegungsrichtung. Die Stauchpresse hat Ständer 6. Ein Kurbelgehäuse 9 ist anstellbar im Gerüstständer der Stauchpresse geführt. Die Anstellung des Kurbelgehäuses erfolgt mit Hilfe einer mechanischen Anstellung 10. Es ist jedoch auch eine hydraulisch wirkende Kolben/Zylinder-Konstruktion als Anstellvorrichtung einsetzbar.Fig. 1 shows the horizontal section through the overhanging upsetting press 1 for reducing the width of
Zu beiden Seiten der Bramme 2 sind Preßwerkzeuge 7 in Werkzeugträgern 8 angeordnet. Das Preßwerkzeug und der Werkzeugträger haben einen in Normalrichtung, d.h. senkrecht zur Bramme 2 wirkenden Reduktionsantrieb 11 und einen in Tangentialrichtung, also parallel zur Bramme 2 wirkenden Vorschubantrieb 12. Der Reduktionsantrieb wird dadurch gebildet, daß jeder Werkzeugträger 8 mit Hilfe eines von zwei Exzenterwellen 13 betätigten Lenkersystems, welches zwei Pleuel 14 enthält, im wesentlichen in Richtung der in der Breite zu reduzierenden Bramme bewegbar ist. Der im wesentlichen in Richtung des Brammenvorschubs wirkende Vorschubantrieb 12 greift am Werkzeugträger 8 an und ist am Kurbelgehäuse abgestützt, in welchem die zwei Exzenterwellen gelagert sind. Der Pleuelkopf 15 der Pleuel 14 ist in einer entsprechend ausgeformten Druckpfanne 16 des Werkzeugträgers 8 beweglich gelagert.Pressing tools 7 are arranged in
Fig. 2 zeigt in stark vergrößerter Darstellung den Pleuelkopf 15 des aus den Exzenterwellen gebildeten Kurbeltriebs 17, der in einer entsprechend ausgeformten Druckpfanne 16 des Werkzeugträgers 8 beweglich gelagert ist. Der Pleuelkopf weist eine Gleitbandage 18 mit hydrostatischer Druckschmierung auf, die mindestens der Berührungslänge der Druckpfanne 16 entspricht. Die Gleitbandage 18 weist auf ihrer der Druckpfanne 16 zugewandten Oberfläche etwa gleich verteilte Schmiertaschen 19 auf, in welche durch den Pleuel des Kurbeltriebs hindurchgeführte Fettkanäle 20 einmünden. An die Eintrittsbohrung 21 der Fettkanäle 20 sind nicht näher dargestellte Fettleitungen anschließbar, die mit einer permanent druckerzeugenden Fettpumpe in Verbindung stehen. Die Druckpfanne 16 im Werkzeugträger 8 ist mit einer Drucklagerschale 22 aus einem bronzehaltigen Material versehen. Unterhalb der Drucklagerschale sind über deren Breite mäanderartig verlaufende Kühlmittelkanäle 23 angeordnet, die jeweils an einem Ende der Drucklagerschale die Anschlußöffnung für den Kühlmitteleintritt bzw. den Kühlmittelaustritt haben. Die der Druckpfanne zugewandte Oberfläche der Gleitbandage ist derart fein geschliffen, daß die Rauhtiefe der Oberfläche einen Wert von 0,2 u nicht überschreitet. Die Gleitbandage 18 ist mit dem Pleuelkopf 15 mit Schrauben 25 verbunden und weist zusätzlich eine Klebeverbindung auf. In den Endbereich 26, 27 von Drucklagerschale 22 und Gleitbandage 18 sind Einrichtungen 28, 29 zum Sammeln und Absaugen des Übertrittsfetts angeordnet.2 shows in a greatly enlarged illustration the connecting
Fig. 3 zeigt die Draufsicht auf die abgewickelte Gleitbandage 18, auf deren Oberfläche etwa gleichverteilte Schmiertaschen 19 angeordnet sind, in welche die durch den Pleuel 14 des Kurbeltriebs 17 hindurchgeführten Fettkanäle 20 einmünden. Im Bereich eines Druckwinkels von etwa 45° zu beiden Seiten einer Verbindungslinie zwischen Kurbeltrieblager 31 und Pleuelkopflager 32 sind die Schmiertaschen zu kreuzförmig angeordneten Schmiernuten 30 ausgeformt.FIG. 3 shows the top view of the unwound
Die oben beschriebenen Maßnahmen stellen sicher, daß die hochbelasteten Gleitflächen zwischen Pleuelkopf und Druckpfanne des Kurbeltriebs selbst bei geringer Relativbewegung zueinander eine ausreichende Schmierung erhalten, deren Schmierfilmdicke im Betrieb zwischen Werten von 5 u bis 15 u gehalten werden kann, so daß die Fettschicht auf relativ geringe Werte verdünnt werden kann. Durch das Zusammenwirken der spiegelglatt geschliffenen Gleitbandage verbunden mit einer genauen Fettdosierung sowie mit der kontrollierbaren Fettviskosität durch zusätzliche Wasserkühlung der Druckpfanne ist ein einwandfrei tragender Schmierfilm zwischen den Gleitflächen zu gewährleisten und es läßt sich ein geringer Fettverbrauch erzielen, weil durch diese Maßnahmen die Verdrängungszeit des Fetts aus den Gleitflächen zu der Sammeleinrichtung verlängert wird.The measures described above ensure that the highly loaded sliding surfaces between the connecting rod head and the pressure pan of the crank mechanism receive sufficient lubrication even with a small relative movement to one another, the lubricating film thickness of which can be kept between 5 u and 15 u during operation, so that the grease layer is relatively small Values can be diluted. Due to the interaction of the mirror-smooth ground sliding bandage combined with an exact grease dosage and with the controllable grease viscosity through additional water cooling of the pressure pan, a perfectly load-bearing lubricating film between the sliding surfaces can be guaranteed and a low grease consumption can be achieved because these measures reduce the grease's displacement time the sliding surfaces to the collecting device is extended.
- 1 Stauchpresse1 compression press
- 2 Bramme2 slabs
- 3, 4 Treiberrollen3, 4 driver roles
- 5 Bewegungsrichtung5 direction of movement
- 6 Ständer6 stands
- 7 Preßwerkzeug7 pressing tool
- 8 Werkzeugträger8 tool carriers
- 9 Kurbelgehäuse9 crankcase
- 10 mechanische Anstellung10 mechanical adjustment
- 11 Reduktionsantrieb11 reduction drive
- 12 Vorschubantrieb12 feed drive
- 13 Exzenterwellen13 eccentric shafts
- 14 Pleuel14 connecting rods
- 15 Pleuelkopf15 connecting rod head
- 16 Druckpfanne16 pressure pan
- 17 Kurbeltrieb17 crank mechanism
- 18 Gleitbandage18 sliding bandage
- 19 Schmiertaschen19 lubrication pockets
- 20 Fettkanäle20 fat channels
- 21 Eintrittsbohrung21 inlet bore
- 22 Drucklagerschale22 thrust bearing shell
- 23 Kühlmittelkanäle23 coolant channels
- 24 Anschlußöffnung24 connection opening
- 25 Schrauben25 screws
- 26, 27 Endbereiche26, 27 end regions
- 28,29 Sammeleinrichtung28.29 collection facility
- 30 Schmiernuten30 lubrication grooves
- 31 Kurbeltrieblager31 crank drive bearings
- 32 Pleuelkopflager32 connecting rod bearings
Claims (9)
dadurch gekennzeichnet,
daß der Pleuelkopf (15) des Kurbeltriebs (17) in einer entsprechend ausgeformten Druckpfanne (16) des Werkzeugträgers (8) beweglich gelagert ist und daß der Pleuelkopf (15) eine Gleitbandage (18) mit hydrostatischer Druckschmierung aufweist, die mindestens der Berührungslänge der Druckpfanne (16) entspricht.1. Upset press for reducing the width of rolling stock, in particular the slab width in hot wide strip roughing mills, with tool carriers accommodating pressing tools arranged on both sides of the slab edge, which can be moved in the direction of the slab reduction with the aid of a handlebar system actuated by at least one crank mechanism.
characterized,
that the connecting rod head (15) of the crank mechanism (17) is movably mounted in a correspondingly shaped pressure pan (16) of the tool carrier (8) and that the connecting rod head (15) has a sliding bandage (18) with hydrostatic pressure lubrication that is at least the contact length of the pressure pan (16) corresponds.
dadurch gekennzeichnet,
daß die Gleitbandage (18) auf der der Druckpfanne (16) zugewandten Oberfläche etwa gleich verteilte Schmiertaschen (19) aufweist, in welche durch den Pleuel (14) des Kurbeltriebs (17) hindurchgeführte Fettkanäle (20) einmünden.2. Upset press according to claim 1,
characterized,
that the sliding bandage (18) on the surface facing the pressure pan (16) has approximately equally distributed lubrication pockets (19), into which grease channels (20) lead through the connecting rod (14) of the crank mechanism (17).
dadurch gekennzeichnet,
daß zumindest im Druckwinkel von etwa 45° zu beiden Seiten eine Verbindungslinie zwischen Kurbeltrieblager (31) und Pleuelkopflager (32) die Schmiertaschen (15) zu kreuzförmig angeordneten Schmiernuten (30) ausgeformt sind.3. Upset press according to claim 1 or 2,
characterized,
that at least at a pressure angle of approximately 45 ° on both sides of a connecting line between crank drive bearing (31) and connecting rod bearing (32) the lubrication pockets (15) are formed into cruciform lubrication grooves (30).
dadurch gekennzeichnet,
daß die Fettkanäle (20) mit einer permanent druckerzeugenden Fettpumpe in Verbindung stehen.4. Upset press according to at least one of claims 1 to 3,
characterized,
that the grease channels (20) are connected to a permanent pressure-generating grease pump.
dadurch gekennzeichnet,
daß der Werkzeugträger (8) im Bereiche der Druckpfanne (16) mit einer Kühlung versehen ist.5. Upset press according to at least one of the preceding claims,
characterized,
that the tool carrier (8) is provided with cooling in the region of the pressure pan (16).
dadurch gekennzeichnet,
daß die Druckpfannen-Kühlung aus im Werkzeugträger (8) unterhalb der Drucklagerschale (22) über deren Breite mäanderartig verlaufenden Kühlmittelkanälen (23) besteht mit an jeweils einem Ende der Drucklagerschale (22) angeordneten Anschlußöffnungen (24) für den Kühlmitteleintritt bzw. Kühlmittelaustritt.6. Upset press according to at least one of the preceding claims,
characterized,
that the pressure pan cooling consists in the tool carrier (8) below the pressure bearing shell (22) across its width meandering coolant channels (23) with at each end of the pressure bearing shell (22) arranged connection openings (24) for the coolant inlet or outlet.
dadurch gekennzeichnet,
daß die der Druckpfanne (16) zugewandte Oberfläche der Gleitbandage (18) eine Rauhtiefe Ra von 0,2 u nicht überschreitet.7. Upset press according to at least one of the preceding claims,
characterized,
that the surface of the sliding bandage (18) facing the pressure pan (16) does not exceed a roughness depth Ra of 0.2 u.
dadurch gekennzeichnet,
daß die Gleitbandage (18) mit dem Pleuelkopf (15) eine Schraub-und Klebverbindung (25) aufweist.8. upsetting press according to at least one of the preceding claims,
characterized,
that the sliding bandage (18) with the connecting rod head (15) has a screw and adhesive connection (25).
dadurch gekennzeichnet,
daß in den Endbereichen (26, 27) von Drucklagerschale (22) und Gleitbandage (18) Einrichtungen (28, 29) zum Sammeln und Absaugen des Übertrittfetts angeordnet sind.9. upsetting press according to at least one of the preceding claims,
characterized,
that devices (28, 29) for collecting and suctioning off the transfer grease are arranged in the end regions (26, 27) of the thrust bearing shell (22) and sliding bandage (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT91112375T ATE102088T1 (en) | 1990-08-10 | 1991-07-24 | HEADING PRESS FOR WIDTH REDUCTION OF ROLLED PRODUCTS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4025390A DE4025390A1 (en) | 1990-08-10 | 1990-08-10 | SQUEEZING PRESS FOR REDUCING THE WIDTH OF ROLLED GOODS |
| DE4025390 | 1990-08-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0470435A2 true EP0470435A2 (en) | 1992-02-12 |
| EP0470435A3 EP0470435A3 (en) | 1992-04-22 |
| EP0470435B1 EP0470435B1 (en) | 1994-03-02 |
Family
ID=6412016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91112375A Expired - Lifetime EP0470435B1 (en) | 1990-08-10 | 1991-07-24 | Upsetting press for reducing the width of rolling stock |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5168739A (en) |
| EP (1) | EP0470435B1 (en) |
| KR (1) | KR920004135A (en) |
| CN (1) | CN1026866C (en) |
| AT (1) | ATE102088T1 (en) |
| DE (2) | DE4025390A1 (en) |
| ES (1) | ES2050489T3 (en) |
| RU (1) | RU2050995C1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970003117B1 (en) * | 1991-02-26 | 1997-03-14 | 기와사끼 세이데쓰 가부시끼가이샤 | Continuous forging apparatus for cast strand |
| JP2730845B2 (en) * | 1993-06-07 | 1998-03-25 | 川崎製鉄株式会社 | Sizing press device and die changing method thereof |
| US5852970A (en) * | 1995-11-27 | 1998-12-29 | The Minster Machine Company | Underdrive opposing action press |
| DE10355977A1 (en) * | 2003-11-27 | 2005-06-30 | Sms Demag Ag | Roll stand for upsetting stands in rolling mills, which is made of several parts |
| CN100464884C (en) * | 2006-12-07 | 2009-03-04 | 郑红专 | Self-lubricating segmental roller base |
| CN114643283B (en) * | 2022-03-25 | 2023-09-05 | 马鞍山钢铁股份有限公司 | Fixed-width press hammer cooling structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1594660A (en) * | 1968-10-14 | 1970-06-08 | ||
| DE2531591A1 (en) * | 1974-04-11 | 1977-02-03 | Tadeusz Sendzimir | PROCEDURE AND EQUIPMENT FOR CHANGING THE SECTION OF SLABS |
| DE2905543B1 (en) * | 1979-02-14 | 1980-06-04 | Kuesters Eduard | Roller for the pressure treatment of webs |
| DE3917398A1 (en) * | 1989-05-29 | 1990-12-06 | Schloemann Siemag Ag | FLYING PRESS |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1947023A (en) * | 1933-04-05 | 1934-02-13 | Gen Motors Res Corp | Piston pin lubrication system |
| BE407256A (en) * | 1935-01-12 | |||
| DE1141890B (en) * | 1956-04-13 | 1962-12-27 | Waterbury Farrel Foundry Co | Knuckle-joint drive for a press slide, in particular for upsetting presses for headed bolts |
| US3017229A (en) * | 1958-12-11 | 1962-01-16 | Gen Motors Corp | Bearing lubrication means |
| US3122033A (en) * | 1962-02-02 | 1964-02-25 | Eumuco Ag Fur Maschb | Die forging press |
| US3685341A (en) * | 1970-06-16 | 1972-08-22 | U S Eng Co Inc | Ram head and adjustable connector combination |
| JPS52113445A (en) * | 1976-03-19 | 1977-09-22 | Daido Metal Co Ltd | Bearing metal |
| JPS52120252A (en) * | 1976-04-02 | 1977-10-08 | Honda Motor Co Ltd | Method and device for forging thin plate member |
| SU623748A1 (en) * | 1976-12-06 | 1978-08-01 | Воронежское производственное объединение по выпуску тяжелых механических прессов | Crank press ram |
| JPH0777656B2 (en) * | 1986-08-05 | 1995-08-23 | 博康 塩川 | Counterbalance hammer |
| JPH036035A (en) * | 1989-06-02 | 1991-01-11 | Toshiba Corp | Semiconductor device |
-
1990
- 1990-08-10 DE DE4025390A patent/DE4025390A1/en not_active Withdrawn
-
1991
- 1991-07-24 DE DE91112375T patent/DE59101077D1/en not_active Expired - Lifetime
- 1991-07-24 AT AT91112375T patent/ATE102088T1/en not_active IP Right Cessation
- 1991-07-24 ES ES91112375T patent/ES2050489T3/en not_active Expired - Lifetime
- 1991-07-24 EP EP91112375A patent/EP0470435B1/en not_active Expired - Lifetime
- 1991-08-09 RU SU915001264A patent/RU2050995C1/en active
- 1991-08-10 KR KR1019910013817A patent/KR920004135A/en not_active Application Discontinuation
- 1991-08-10 CN CN91105466A patent/CN1026866C/en not_active Expired - Lifetime
- 1991-08-12 US US07/744,459 patent/US5168739A/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1594660A (en) * | 1968-10-14 | 1970-06-08 | ||
| DE2531591A1 (en) * | 1974-04-11 | 1977-02-03 | Tadeusz Sendzimir | PROCEDURE AND EQUIPMENT FOR CHANGING THE SECTION OF SLABS |
| DE2905543B1 (en) * | 1979-02-14 | 1980-06-04 | Kuesters Eduard | Roller for the pressure treatment of webs |
| DE3917398A1 (en) * | 1989-05-29 | 1990-12-06 | Schloemann Siemag Ag | FLYING PRESS |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2050489T3 (en) | 1994-05-16 |
| CN1026866C (en) | 1994-12-07 |
| EP0470435B1 (en) | 1994-03-02 |
| KR920004135A (en) | 1992-03-27 |
| RU2050995C1 (en) | 1995-12-27 |
| DE4025390A1 (en) | 1992-02-13 |
| CN1058734A (en) | 1992-02-19 |
| ATE102088T1 (en) | 1994-03-15 |
| DE59101077D1 (en) | 1994-04-07 |
| US5168739A (en) | 1992-12-08 |
| EP0470435A3 (en) | 1992-04-22 |
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