EP0794021B1 - Device for in situ precision grinding of the rolls of hot strip mills - Google Patents
Device for in situ precision grinding of the rolls of hot strip mills Download PDFInfo
- Publication number
- EP0794021B1 EP0794021B1 EP97250044A EP97250044A EP0794021B1 EP 0794021 B1 EP0794021 B1 EP 0794021B1 EP 97250044 A EP97250044 A EP 97250044A EP 97250044 A EP97250044 A EP 97250044A EP 0794021 B1 EP0794021 B1 EP 0794021B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- rolls
- hot strip
- grinding shaft
- tailstock sleeve
- 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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- 238000011065 in-situ storage Methods 0.000 title claims 10
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000951498 Brachypteraciidae Species 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
- B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
- B24B5/045—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally with the grinding wheel axis perpendicular to the workpiece axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/16—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged
- B24B5/167—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged for rolls with large curvature radius, e.g. mill rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/363—Single-purpose machines or devices for grinding surfaces of revolution in situ
Definitions
- the invention relates to a device for regrinding in Hot strip mill stands built-in rolls by means of pot-shaped rotating Grinding tools that are oscillating parallel to the roller axis, which Grinding tool at the end of a rotary drive that can be moved transversely to the roller Grinding shaft is attached, which is coaxial in an axially displaceable tubular quill guided and at its opposite end with an indirect on the quill supporting displacement drive is connected.
- the axial displacement of the grinding shaft serves to compensate for wear on the cup wheel (approx. 70 mm); the Axial displacement of the quill serves to compensate for the roll rotation (approx. 80 mm).
- a generic device is provided for regrinding the rolls installed in hot strip mill stands, in particular the work rolls in four-high roll stands.
- the contour of the roll can be reworked in the installed stand in the roll stand with several rotating cup-shaped grinding tools arranged next to one another over the bale length of the roll to be ground, which, together with the tool holder receiving them, can be moved in an oscillating manner parallel to the roll axis and adjusted transversely to this independently of the pressure.
- each grinding tool is separately driven in a speed-controllable manner and is arranged on a quill which is axially displaceable in the tool carrier and is connected to drive elements for the cup-shaped grinding tool.
- the known solution proposes, in order to position the grinding tools against the roller, to move the quills on which the tools are fastened with the aid of piston-cylinder units in the longitudinal direction and thereby to control the tool.
- the piston-cylinder units are pressure and displacement-controlled so that every grinding position and pressure can be moved.
- the sleeves can be moved back into a position in which the grinding tools do not hinder the roll removal.
- the drives for the grinding tools preferably electric motors, are each arranged on the end of the sleeve opposite the grinding tool. which are tubular and encompass coaxially around a rotationally driven grinding sleeve.
- a grinding shaft which is connected to the grinding sleeve in a rotationally fixed manner is axially displaceable relative to the grinding sleeve by small adjustment paths, which carries the grinding tool at one free end projecting from the grinding sleeve and is connected at its other end to a controllable displacement drive for the grinding shaft, which in turn is supported indirectly on the quill.
- the quill on its inner circumference receives the stator of an electric motor driving the grinding shaft, the rotor is arranged on the grinding shaft slidably mounted directly in the quill.
- the invention considerably simplifies the known device. This is the separation between the rotary drive for the grinding tool and that of the grinding tool abandoned immediately receiving grinding shaft, so that also on the grinding sleeve can be dispensed with, which previously drove the grinding tool. Rather, the Grinding shaft Part of the electric motor, namely its motor shaft.
- the stator of the motor is arranged in the movable quill, against which the rotor is axially can move. This design is compared to a significant weight saved on the conventional solution. This also means an improvement in quality on the ground roller.
- the generic device builds much easier and is also cheaper to manufacture.
- the flange bushing can preferably be moved axially in ball guides in the sleeve; but it can also slide guides for mounting the flange sleeves against the Quill may be provided.
- the flange bushings slide in the end plates of the quill.
- the flange sleeve has a Metal bellows sealed against the quill.
- Another proposal is the grinding shaft opposite the flange sleeve through a V-ring seal to seal.
- a metal bellows is provided for the sleeve for sealing the grinding shaft, the front bellows for the force-free displacement of the grinding shaft Pressure force and the rear bellows pulling force on the grinding shaft.
- the rear bellows can also be used to prevent rotation for displacement the grinding shaft provided push rod can be formed, which extends over two Thrust bearing supported on the rotating grinding shaft.
- the Quill axis is arranged eccentrically to the grinding shaft axis, so in very a simple adjustment by turning the quill Grinding shaft to the roller axis can be reached.
- the only drawing figure shows a longitudinal section through an inventive Device for regrinding the rolls installed in hot strip mill stands.
- the device is shown roughly schematically simplified.
- the tubular sleeve 3 is at 4 slidably mounted. Hydraulic cylinders 5, which are on the Carriers 2 are arranged and their piston rods 6 indirectly at 7 with the sleeve 3 are connected.
- the sleeve 3 is, as already stated, tubular and carries in it Inner circumference of the stator 8 of an electric motor defined there.
- the rotor 9 this Electric motor is attached directly to the grinding shaft 10, which is on its front End 11 receives the cup-shaped grinding wheel 12 and at its rear end with a displacement drive 13 is connected to which the grinding shaft 10 around Displacement stroke 14 is movable in both directions.
- the axial thrust bearing 15 is provided on the end face of the grinding shaft 10, which and push rod 16 is connected via the axial reciprocating movements on the Grinding shaft 10 can be transmitted, the thrust bearing simultaneously the enable free rotation of the grinding shaft 10.
- the compressed air cylinder 17 is provided, the piston cylinder surfaces 18 can be acted upon on both sides with compressed air.
- angular contact ball bearings 19 provided with which the grinding shaft 10 is mounted in the sleeve 3.
- the inner rings 20 of these angular contact ball bearings are on the grinding shaft 10 and their Outer rings are held on flange bushings 21, which in relation to the sleeve 3 in Axial direction of the grinding shaft 10 are slidably mounted.
- the flange bushings 21 slide over ball guides 22 in the end plates 23 of the sleeve 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Nachschleifen der in Warmbandwalzgerüsten eingebauten Walzen mittels topfförmiger rotierender Schleifwerkzeuge, die parallel zur Walzenachse oszillierend bewegbar sind, wobei das Schleifwerkzeug am Ende einer quer zur Walze verschiebbaren drehangetriebenen Schleifwelle befestigt ist, die in einer axialverschiebbaren rohrförmigen Pinole koaxial geführt und an ihrem entgegengesetzten Ende mit einem sich an der Pinole mittelbar abstützenden Verschiebeantrieb verbunden ist. Die Axialverschiebung der Schleifwelle dient zur Kompensation der Abnutzung der Topfscheibe (ca. 70 mm); die Axialverschiebung der Pinole dient zur Kompensation der Walzenabdrehung (ca. 80 mm).The invention relates to a device for regrinding in Hot strip mill stands built-in rolls by means of pot-shaped rotating Grinding tools that are oscillating parallel to the roller axis, which Grinding tool at the end of a rotary drive that can be moved transversely to the roller Grinding shaft is attached, which is coaxial in an axially displaceable tubular quill guided and at its opposite end with an indirect on the quill supporting displacement drive is connected. The axial displacement of the grinding shaft serves to compensate for wear on the cup wheel (approx. 70 mm); the Axial displacement of the quill serves to compensate for the roll rotation (approx. 80 mm).
Eine derartige Vorrichtung ist aus der DE 44 09 060 A1 bekannt.
Eine gattungsgemäße Vorrichtung ist dazu vorgesehen, die in Warmbandwalzgerüsten
eingebauten Walzen, insbesondere die Arbeitswalzen in Quarto-Walzgerüsten
nachzuschleifen. Mit mehreren über die Ballenlänge der zu schleifenden Walze verteilt
nebeneinander angeordneter rotierender topfförmiger Schleifwerkzeuge, die
zusammen mit dem sie aufnehmenden Werkzeugträger parallel zur Walzenachse
oszillierend bewegbar und quer zu dieser unabhängig druckgeregelt anstellbar sind,
kann die Kontur der Walze im eingebauten Zustand im Walzgerüst nachgearbeitet
werden, wobei jedes Schleifwerkzeug separat geschwindigkeitsregelbar
drehangetrieben und an einer quer zur Walze axialverschiebbar in dem
Werkzeugträger gelagerten Pinole angeordnet ist, die mit Antriebselementen für das
topfförmige Schleifwerkzeug verbunden ist. Such a device is known from DE 44 09 060 A1.
A generic device is provided for regrinding the rolls installed in hot strip mill stands, in particular the work rolls in four-high roll stands. The contour of the roll can be reworked in the installed stand in the roll stand with several rotating cup-shaped grinding tools arranged next to one another over the bale length of the roll to be ground, which, together with the tool holder receiving them, can be moved in an oscillating manner parallel to the roll axis and adjusted transversely to this independently of the pressure. wherein each grinding tool is separately driven in a speed-controllable manner and is arranged on a quill which is axially displaceable in the tool carrier and is connected to drive elements for the cup-shaped grinding tool.
Das Nacharbeiten der Konturen der Arbeitswalzen von Warmbandwalzgerüsten nach Erreichen eines bestimmten Verschleißzustandes im eingebauten Zustand stellt eine Verbesserung gegenüber dem bislang überwiegend angewendeten Nachschleifen der Walzen im ausgebauten Zustand auf externen Walzenschleifmaschinen dar. Die bekannte Vorrichtung ermöglicht das Nacharbeiten der Walzenoberfläche mit großer Genauigkeit und erlaubt auch die Herstellung besonderer Walzenschliffprofile, selbst wenn das Verschleißbild der Walze nach dem Walzen stets gleicher Bandbreiten gegenüber der Walzenmitte ausgeprägte Randbereiche mit kleinerem Durchmesser aufweist bzw. die Walze am Rand Verschleißrillen infolge der kalten Randbereiche aufweist.The reworking of the contours of the work rolls of hot strip mill stands after Reaching a certain state of wear in the installed state represents a Improvement compared to the regrinding of the Rolls in the removed state on external roll grinding machines Known device allows reworking the roll surface with a large Accuracy and also allows the production of special roller ground profiles, itself if the wear pattern of the roller is always the same after rolling pronounced edge areas with a smaller diameter than the center of the roller has or the roller at the edge wear grooves due to the cold edge areas having.
Die bekannte Lösung schlägt zum Anstellen der Schleifwerkzeuge gegen die Walze
vor, Pinolen, an denen die Werkzeuge befestigt sind, mit Hilfe von Kolben-Zylinder-Einheiten
in Längsrichtung zu verschieben und dadurch das Werkzeug zu steuern. Die
Kolben-Zylinder-Einheiten sind druck- und weggeregelt, so daß jede Schleifposition
und jeder Schleifdruck gefahren werden kann. Außerdem können die Pinolen beim
Arbeitswalzenwechsel in eine Position zurückgefahren werden, in der die
Schleifwerkzeuge den Walzenausbau nicht behindern. Die Antriebe für die
Schleifwerkzeuge, vorzugsweise Elektromotoren, sind jeweils am dem
Schleifwerkzeug entgegengesetzten Ende der Pinolen angeordnet.
die rohrförmig ausgebildet sind und eine drehantreibbare Schleifhülse koaxial
umgreifen. In der Schleifhülse ist eine drehfest mit der Schleifhülse verbundene
Schleifwelle gegenüber der Schleifhülse um geringe Anstellwege axial verschiebbar
geführt, die an ihrem einen freien aus der Schleifhülse herausragenden Ende das
Schleifwerkzeug trägt und an ihrem anderen Ende mit einem regelbaren
Verschiebeantrieb für die Schleifwelle verbunden ist, der sich seinerseits an der Pinole
mittelbar abstützt.The known solution proposes, in order to position the grinding tools against the roller, to move the quills on which the tools are fastened with the aid of piston-cylinder units in the longitudinal direction and thereby to control the tool. The piston-cylinder units are pressure and displacement-controlled so that every grinding position and pressure can be moved. In addition, when changing the work roll, the sleeves can be moved back into a position in which the grinding tools do not hinder the roll removal. The drives for the grinding tools, preferably electric motors, are each arranged on the end of the sleeve opposite the grinding tool.
which are tubular and encompass coaxially around a rotationally driven grinding sleeve. In the grinding sleeve, a grinding shaft which is connected to the grinding sleeve in a rotationally fixed manner is axially displaceable relative to the grinding sleeve by small adjustment paths, which carries the grinding tool at one free end projecting from the grinding sleeve and is connected at its other end to a controllable displacement drive for the grinding shaft, which in turn is supported indirectly on the quill.
Bei Reversier-Warmwalzgerüsten großer Breite und der geforderten Steifigkeit des Systems müssen bei der Bewegung der Schleifwerkzeuge die Beschleunigungs- und Bremskräfte sicher von den Vorrichtungselementen aufgefangen werden, wenn ein qualitativ hohes Schleifergebnis gefordert ist. Im Schleifbetrieb haben die Schleifwerkzeuge lediglich Axialbewegungen von wenigen mm (jedoch in kurzen Zeitintervallen) in beiden Richtungen auszuführen, während die Pinolen für den Ausbau der Walzen oder für das Auswechseln der Schleifwerkzeuge um größere Wege verfahrbar sein müssen.With reversing hot rolling stands of large width and the required rigidity of the Systems have to accelerate and when moving the grinding tools Braking forces are safely absorbed by the device elements when a high quality grinding result is required. In grinding operation they have Grinding tools only axial movements of a few mm (but in short Time intervals) in both directions, while the quills for the Removal of the rollers or for changing the grinding tools for larger ones Paths must be traversable.
Es ist die Aufgabe der vorliegenden Erfindung, eine Vorrichtung der gattungsgemäßen Art so zu vereinfachen, daß mit weniger Teilen die Vorrichtung vereinfacht wird.It is the object of the present invention, a device of the generic type Type to simplify so that the device is simplified with fewer parts.
Zur Lösung der Aufgabe wird vorgeschlagen, daß die Pinole an ihrem Innenumfang den Stator eines die Schleifwelle antreibenden Elektromotors aufnimmt, dessen Rotor auf der unmittelbar in der Pinole verschiebbar gelagerten Schleifwelle angeordnet ist.To solve the problem it is proposed that the quill on its inner circumference receives the stator of an electric motor driving the grinding shaft, the rotor is arranged on the grinding shaft slidably mounted directly in the quill.
Die Erfindung vereinfacht die bekannte Vorrichtung erheblich. Dazu wird die Trennung zwischen dem Drehantrieb für das Schleifwerkzeug und der das Schleifwerkzeug unmittelbar aufnehmenden Schleifwelle aufgegeben, so daß auch auf die Schleifhülse verzichtet werden kann, die bisher das Schleifwerkzeug antrieb. Vielmehr wird die Schleifwelle Teil des Elektromotors, nämlich dessen Motorwelle. Der Stator des Motors ist in der verschiebbaren Pinole angeordnet, gegenüber dem sich der Rotor axial verschieben kann. Durch diese Ausführung wird ein erhebliches Gewicht gegenüber der herkömmlichen Lösung eingespart. Das bedeutet auch eine Qualitätsverbesserung an der geschliffenen Walze. Darüber hinaus baut die gattungsgemäße Vorrichtung wesentlich einfacher und ist auch preiswerter herzustellen.The invention considerably simplifies the known device. This is the separation between the rotary drive for the grinding tool and that of the grinding tool abandoned immediately receiving grinding shaft, so that also on the grinding sleeve can be dispensed with, which previously drove the grinding tool. Rather, the Grinding shaft Part of the electric motor, namely its motor shaft. The stator of the motor is arranged in the movable quill, against which the rotor is axially can move. This design is compared to a significant weight saved on the conventional solution. This also means an improvement in quality on the ground roller. In addition, the generic device builds much easier and is also cheaper to manufacture.
In einer weiteren günstigen Ausgestaltung der Erfindung ist vorgesehen, daß zur Lagerung der Schleifwelle in der Pinole an deren beiden Enden Schrägkugellager vorgesehen sind, deren Innenringe auf der Schleifwelle und deren Außenringe auf einer Flanschbüchse gehalten sind, die gegenüber der Pinole in Achsrichtung der Schleifwelle verschiebbar gelagert sind. Der Verschiebeweg der Flanschbüchse entspricht dem Verschiebehub der Schleifwelle.In a further advantageous embodiment of the invention it is provided that Bearing of the grinding shaft in the quill at both ends of angular contact ball bearings are provided, the inner rings on the grinding shaft and the outer rings a flange sleeve are held, which is opposite the sleeve in the axial direction of the Grinding shaft are slidably mounted. The displacement path of the flange sleeve corresponds to the displacement stroke of the grinding shaft.
Vorzugsweise sind die Flanschbüchse in Kugelführungen in der Pinole axial bewegbar; es können aber auch Gleitführungen zur Lagerung der Flanschbüchsen gegenüber der Pinole vorgesehen sein. Die Flanschbüchsen gleiten in den Endplatten der Pinole.The flange bushing can preferably be moved axially in ball guides in the sleeve; but it can also slide guides for mounting the flange sleeves against the Quill may be provided. The flange bushings slide in the end plates of the quill.
Nach einem weiteren Merkmal der Erfindung ist die Flanschbüchse über einen Metallfaltenbalg gegenüber der Pinole abgedichtet. Ein anderer Vorschlag sieht vor, die Schleifwelle gegenüber der Flanschbüchse durch eine V-Ring-Dichtung abzudichten.According to a further feature of the invention, the flange sleeve has a Metal bellows sealed against the quill. Another proposal is the grinding shaft opposite the flange sleeve through a V-ring seal to seal.
In einer günstigen Weiterbildung der Erfindung ist vorgesehen, daß an beiden Enden der Pinole zum Abdichten der Schleifwelle jeweils ein Metall-Faltenbalg vorgesehen ist, wobei zum kräftefreien Verschieben der Schleifwelle der vorderer Faltenbalg Druckkraft und der hinterer Faltenbalg Zugkraft auf die Schleifwelle ausübt. Auf diese Weise wird eine besonders leicht zu verschiebende, aber dennoch stabile Lagerung der Schleifwelle in der Pinole geschaffen.In a favorable development of the invention it is provided that at both ends a metal bellows is provided for the sleeve for sealing the grinding shaft, the front bellows for the force-free displacement of the grinding shaft Pressure force and the rear bellows pulling force on the grinding shaft. To this A particularly easy-to-move, yet stable storage becomes a wise choice the grinding shaft in the quill.
Der hintere Faltenbalg kann gleichzeitig als Verdrehsicherung der zur Verschiebung der Schleifwelle vorgesehenen Schubstange ausgebildet sein, die sich über zwei Drucklager an der drehenden Schleifwelle abstützt.The rear bellows can also be used to prevent rotation for displacement the grinding shaft provided push rod can be formed, which extends over two Thrust bearing supported on the rotating grinding shaft.
Wenn nach einem weiteren Merkmal der Erfindung vorgesehen ist, daß die Pinolenachse zur Schleifwellenachse exzentrisch angeordnet ist, so kann in sehr einfacher Weise durch Verdrehen der Pinole eine Senkrechtverstellung der Schleifwelle zur Walzenachse erreicht werden.If according to a further feature of the invention it is provided that the Quill axis is arranged eccentrically to the grinding shaft axis, so in very a simple adjustment by turning the quill Grinding shaft to the roller axis can be reached.
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.
Die einzige Zeichnungsfigur zeigt einen Längsschnitt durch eine erfindungsgemäße Vorrichtung zum Nachschleifen der in Warmbandwalzgerüsten eingebauten Walzen. Die Vorrichtung ist grob schematisch vereinfacht dargestellt.The only drawing figure shows a longitudinal section through an inventive Device for regrinding the rolls installed in hot strip mill stands. The device is shown roughly schematically simplified.
In einem am Walzenständer festgelegten Träger 2 ist die rohrförmige Pinole 3 bei 4
verschiebbar gelagert. Als Verschiebeantrieb dienen Hydraulikzylinder 5, die am
Träger 2 angeordnet sind und deren Kolbenstangen 6 mittelbar bei 7 mit der Pinole 3
verbunden sind.In a
Die Pinole 3 ist, wie bereits ausgeführt, rohrförmig ausgebildet und trägt in ihrem
Innenumfang den dort festgelegten Stator 8 eines Elektromotors. Der Rotor 9 dieses
Elektromotors ist unmittelbar auf der Schleifwelle 10 befestigt, die an ihrem vorderen
Ende 11 die topfförmige Schleifscheibe 12 aufnimmt und an ihrem hinteren Ende mit
einem Verschiebeantrieb 13 verbunden ist, mit dem die Schleifwelle 10 um den
Verschiebehub 14 in beiden Richtungen bewegbar ist. Zu diesem Zweck sind
stirnseitig an der Schleifwelle 10 die Axialdrucklager 15 vorgesehen, die mit einer Zug-
und Druckstange 16 verbunden ist, über die axiale Hin- und Herbewegungen auf die
Schleifwelle 10 übertragen werden können, wobei die Axialdrucklager gleichzeitig die
freie Drehbarkeit der Schleifwelle 10 ermöglichen. Zur Betätigung der Zug- und
Druckstange 16 und damit der Schleifwelle 10 ist der Druckluftzylinder 17 vorgesehen,
dessen Kolbenzylinderflächen 18 beidseitig mit Druckluft beaufschlagbar sind.The
Beim Verschieben der Schleifwelle 10 über den Druckluftzylinder 17 verschiebt sich
diese zusammen mit dem Rotor 9 in dem feststehenden Stator 8 im Inneren der Pinole
3. Um die Axialverschiebbarkeit zu ermöglichen, sind Schrägkugellager 19
vorgesehen, mit denen die Schleifwelle 10 in der Pinole 3 gelagert ist.
Die Innenringe 20 dieser Schrägkugellager sind auf der Schleifwelle 10 und deren
Außenringe auf Flanschbüchsen 21 gehalten sind, die gegenüber der Pinole 3 in
Achsrichtung der Schleifwelle 10 verschiebbar gelagert sind. Die Flanschbüchsen 21
gleiten über Kugelführungen 22 in den Endplatten 23 der Pinole 3.When moving the
An beiden Enden der Pinole 3 ist zum Abdichten der Schleifwelle 10 jeweils ein Metall-Faltenbalg
24 vorgesehen ist, wobei zum kräftefreien Verschieben der Schleifwelle der
vorderer Faltenbalg Druckkraft und der hinterer Faltenbalg Zugkraft auf die
Schleifwelle 10 ausübt.At both ends of the
Durch die erfindungsgemäße Konstruktion wird einerseits eine exakte Lagerung der Schleifwelle innerhalb der Pinole gewährleistet und andererseits die Verschiebung der Schleifwelle ermöglicht, ohne daß - wie dies beim Stand der Technik üblich war - zusätzliche Führungshülsen für die Schleifwelle vorgesehen sein müssen.Due to the construction according to the invention, on the one hand, an exact mounting of the Grinding shaft inside the quill ensures and on the other hand the displacement of the Grinding shaft enables without - as was customary in the prior art - additional guide sleeves for the grinding shaft must be provided.
Claims (9)
- Device for in situ precision grinding of the rolls of hot strip mills by means of pot-shaped rotary grinding tools (12), which are movable in an oscillating manner parallel to the roll axis, wherein the grinding tool (12) is fixed to the end of a rotary-driven grinding shaft (10) which is displaceable transverse to the roll and which is guided coaxially in an axially displaceable tubular tailstock sleeve (3) and is connected at its opposite end to a displacement drive (13) bearing indirectly on the tailstock sleeve (3), characterised in that the tailstock sleeve (3) receives at its inner circumference the stator (8) of an electric motor, which drives the grinding shaft (10) and whose rotor (9) is disposed on the grinding shaft (10) mounted axially displaceably directly in the tailstock sleeve (3).
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 1, characterised in that for mounting the grinding shaft (10) in the tailstock sleeve (3), angular ball bearings are provided at both its ends, whose inner rings (20) are held on the grinding shaft (10) and whose outer rings are held on a flanged box, which are mounted displaceably relative to the tailstock sleeve (3) in the axial direction of the grinding shaft (10).
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 2, characterised in that the flanged box (21) is axially movable in a ball guide (22) in the tailstock sleeve (3).
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 2, characterised in that the flanged box (21) is axially movable in a sliding bearing in the tailstock sleeve (3).
- Device for in situ precision grinding of the rolls of hot strip mills according to claims 2 to 5, characterised in that the flanged box (21) is sealed relative to the tailstock sleeve (3) by a metal concertina device (24).
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 2 to 5, characterised in that the grinding shaft (10) is sealed relative to the flanged box (21) by V-ring seals
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 5, characterised in that for sealing the grinding shaft (10) at both ends of the tailstock sleeve (3) a respective metal concertina device is provided, and for the force-free displacement of the grinding shaft the front concertina device exerts pressure and the rear concertina device exerts tension on the grinding shaft (10).
- Device for in situ precision grinding of the rolls of hot strip mills according to claim 7, characterised in that the rear concertina device (24) is formed simultaneously as a rotation prevention device of the connecting rod (16) which is provided for displacement of the grinding shaft (10) and which bears via two pressure bearings (15) on the rotating grinding shaft (10).
- Device for in situ precision grinding of the rolls of hot strip mills according to one or more of the preceding claims, characterised in that the tailstock sleeve axis is disposed eccentric to the grinding wheel axis.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19609259 | 1996-02-28 | ||
| DE19609259A DE19609259C2 (en) | 1996-02-28 | 1996-02-28 | Device for regrinding the rolls installed in hot strip mill stands |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0794021A1 EP0794021A1 (en) | 1997-09-10 |
| EP0794021B1 true EP0794021B1 (en) | 2000-03-22 |
Family
ID=7787782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97250044A Expired - Lifetime EP0794021B1 (en) | 1996-02-28 | 1997-02-27 | Device for in situ precision grinding of the rolls of hot strip mills |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0794021B1 (en) |
| DE (2) | DE19609259C2 (en) |
| ES (1) | ES2143831T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10016981C2 (en) * | 2000-04-06 | 2002-05-08 | Thielenhaus Ernst Gmbh & Co Kg | Device for machining workpieces |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE640379C (en) * | 1933-03-03 | 1936-12-31 | Himmelwerk A G | Electrically driven grinding machine for manufacturing dimensionally accurate workpieces |
| DE2206533A1 (en) * | 1972-02-11 | 1973-08-16 | Marcello Toncelli | GRINDING MACHINE FOR GRINDING THE EDGES OF A MARBLE TOP |
| FR2326270A1 (en) * | 1975-10-02 | 1977-04-29 | Europ Propulsion | TOOL HOLDER SPINDLE ASSEMBLY, ESPECIALLY FOR GRINDING MACHINE |
| JPS60234706A (en) * | 1984-05-07 | 1985-11-21 | Mitsubishi Heavy Ind Ltd | Roll grinding method for rolling mill |
| DE4409060C3 (en) * | 1994-03-11 | 2000-08-03 | Mannesmann Ag | Device for regrinding built-in rollers |
| DE19537521C2 (en) * | 1995-09-29 | 1997-09-18 | Mannesmann Ag | Device for regrinding the rolls installed in hot strip mill stands |
-
1996
- 1996-02-28 DE DE19609259A patent/DE19609259C2/en not_active Expired - Fee Related
-
1997
- 1997-02-27 EP EP97250044A patent/EP0794021B1/en not_active Expired - Lifetime
- 1997-02-27 ES ES97250044T patent/ES2143831T3/en not_active Expired - Lifetime
- 1997-02-27 DE DE59701291T patent/DE59701291D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2143831T3 (en) | 2000-05-16 |
| DE59701291D1 (en) | 2000-04-27 |
| DE19609259A1 (en) | 1997-09-04 |
| EP0794021A1 (en) | 1997-09-10 |
| DE19609259C2 (en) | 1998-07-02 |
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