EP0852525B1 - Method of producing large annular workpieces - Google Patents
Method of producing large annular workpieces Download PDFInfo
- Publication number
- EP0852525B1 EP0852525B1 EP96934481A EP96934481A EP0852525B1 EP 0852525 B1 EP0852525 B1 EP 0852525B1 EP 96934481 A EP96934481 A EP 96934481A EP 96934481 A EP96934481 A EP 96934481A EP 0852525 B1 EP0852525 B1 EP 0852525B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- hot
- hip
- ring
- produced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- the invention relates to a method for manufacturing large ring-shaped workpieces, especially ring bandages for wear-resistant press rolls, through a hot isostatic Pressing process.
- the for the hot isostatic pressing process usable materials have very good Wear properties, which is why manufactured Ring bandages should preferably be used.
- hot isostatic presses take place at high pressure and high temperature, as evenly as possible on the whole Workpiece to be applied, so that for it suitable devices (HIP systems) strong in size are limited.
- the field of application of such bandages should also, however on briquetting, compacting, Material bed shredding, grinders and numerous others Allow proceedings to be extended. This is from economic However, often cause larger bandage diameters required.
- the object of the present invention To provide methods of the type mentioned at the outset the ring-shaped workpieces are made with dimensions can be above the largest possible through the HIP system dimensions to be produced.
- the HIP method is used instead manufactured ring blank without capsule, sleeve or the like processed further.
- a compression of the according to US-A-3982904 in the sleeve filled powder in a subsequent Molding process is therefore in no way according to the invention provided because with a finished blank according to the HIP process is worked.
- the ring blank After hot isostatic pressing, the ring blank still shows a very good plasticity for a subsequent one Thermoforming can be used in an advantageous manner. This can be done relatively inexpensively through the thermoforming process other dimensions or profiles than those of the HIP system specified, manufactured. Thus, the through the HIP system specified dimensional limits of the annular workpieces overcome relatively inexpensive become. This plays a role even with smaller dimensions decisive role, since HIP systems are very complex and are expensive. For some HIP materials, the Thermoforming process also a structural improvement for Episode. Conveniently, the blank can have a diameter be enlarged, because this is the ring bandages corresponding cost advantages result.
- Enlargements can be achieved by the invention in the range from greater than 1: 1 to 3: 1, preferably greater than 1: 1 to 2: 1.
- a HIP system can produce the bandages with a diameter of 1 m that a Can be expanded to a diameter of 2.
- a such drastic enlargement of the blank increases the Application of the ring bandages by a considerable amount.
- the blank is in essentially made entirely from a HIP material.
- the blank provides enough material ready to the necessary dimensions after the thermoforming Obtain ring bandage.
- Another embodiment provides that the blank from a HIP material applied to a suitable base material is produced, the base material with respect of the thermoforming process matched to the HIP material Has properties.
- the base material Steel in question comes as the base material Steel in question. It is important that the material Features that are not in the thermoforming process Detaching the HIP layer from this leads. These circumstances can of course also by appropriate thermoforming conditions be counteracted. However, the decisive factors are essential the properties of the materials.
- the materials can also be coordinated with each other so that the The thermoforming process of the composite is retained.
- thermoforming process An easy way to do the thermoforming process is that the blank during the thermoforming process by forging over a mandrel and / or expanding over one Cone is enlarged. This embodiment is suitable especially in the manufacture of smaller dimensions.
- thermoforming process can be used to produce larger dimensions conveniently done by ring rolling.
- Ring rolling may also be required
- Profiling of the annular workpiece can be generated. A such profiling depends on the particular application the ring bandage.
- thermoforming process can be carried out Rolling the face of the blank is done what has the particular advantage that also in Axial direction of the annular workpiece different HIP or HIP and base materials bonded together can be.
- the invention relates to a ring bandage for press rolls by a method according to one of the Claims 1 to 11 is made.
- the final diameter is larger than the largest due to the HIP system diameter of a blank to be produced.
- the invention thus provides a very economical method Production of ring-shaped work pieces of larger dimensions ready.
- the blank 1 shows an annular blank 1 and an annular bandage 2 made from it.
- the blank 1 has an outer diameter D R and an inner diameter d R and consists of a single HIP material.
- the blank 1 is produced by hot isostatic pressing using high pressure and high temperatures in a HIP system (not shown).
- the currently The largest possible diameter D R of ring-shaped workpieces is approximately 1.2 m.
- the bandage 2 has an outer diameter D B and an inner diameter d B.
- the enlargement of the diameter from blank 1 to bandage 2 in this embodiment is approximately 1.7: 1.
- the blank 1 has correspondingly thicker wall thicknesses so that the correspondingly required wall thickness is achieved with the bandage 2.
- the amount of HIP material required essentially depends on the volume ratios.
- the schematic device for thermoforming shown in FIG. 2 comprises a driven main roll 3, which is seated on the outer periphery 4 of the blank and a roller mandrel 6 pressed onto the inner periphery 5 of the blank 1.
- axial rollers 7 are provided to maintain the axial dimensions of the blank 1.
- the main roll 3 has a diameter d H and the roll mandrel has a diameter d W.
- the degree of rolling on the inner and outer circumference 5.4 can be influenced by the selection of suitable diameters d H and d W , whereby the deformation on the outer and inner circumference 4.5 is optimized accordingly.
- the ratio of the diameter between the main roll 3 and the mandrel 6 also plays an important role here.
- the blank 1 as can be seen in FIG. 2, continuously from the hot forming tool to the dimensions of the Ring bandage 2 rolled. Due to the relatively plastic HIP material, which approximates during this forming process Forging temperature is a ring bandage 2 of good structure and precise dimensions.
- FIG. 3 shows a blank 1 and a ring bandage 2, the two different HIP materials 8 and 9, the are arranged in a ring adjacent to each other, is constructed.
- the materials 8, 9 are by hot isostatic presses for further processing favorable dimensional arrangement has been brought.
- the two HIP materials 8, 9 are coordinated so that e.g. a Advancing the outer material 8 during the Thermoforming process and thus a loosening of the two materials 8, 9 from each other does not take place.
- the device shown in FIG. 2 is particularly suitable.
- By matching the diameter of the main roller 3 and Rolling mandrel 6 one another can use both materials 8, 9 different degree of rolling are deformed.
- the final thickness of the layers of materials 8, 9 must already be taken into account for blank 1.
- FIG. 4 shows a further embodiment of a ring bandage 2 shown, which has a profile.
- the blank 1 can have a corresponding preform, from which then Thermoforming shaped to the dimensions of the ring bandage 2 becomes.
- the main roller 3 and the mandrel 6 also have appropriate profiling. Thus, the different profiles on the outer and inner circumference 4, 5 are generated, the most diverse applications benefit.
- FIG. 5 shows a blank 1 and an annular bandage, in which two materials are arranged axially one behind the other.
- the thermoforming process can accordingly by mainly axial rolling along the End faces.
- bandages are e.g. for briquetting presses, Compacting machines, machines for material bed shredding, for Mills and numerous other applications are used.
- the bandages 2 with special Properties for a wide variety of applications be executed.
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen großer ringförmiger Werkstücke, insbesondere Ringbandagen für verschleißfeste Preßwalzen, durch einen heißisostatischen Preßvorgang.The invention relates to a method for manufacturing large ring-shaped workpieces, especially ring bandages for wear-resistant press rolls, through a hot isostatic Pressing process.
Derartige Werkstücke, insbesondere Ringbandagen, die auf einen Walzenkörper einer Preßwalze aufgebracht werden, sind im Stand der Technik bereits durch heißisostatisches Pressen (HIP) hergestellt worden. Die für den heißisostatischen Preßvorgang verwendbaren Werkstoffe weisen sehr gute Verschleißeigenschaften auf, weshalb so hergestellte Ringbandagen bevorzugt zur Anwendung kommen sollen. Das heißisostatische Pressen erfolgt jedoch bei hohem Druck und hoher Temperatur, die möglichst gleichmäßig auf das gesamte Werkstück aufgebracht werden sollen, so daß die dafür geeigneten Vorrichtungen (HIP-Anlagen) in ihrer Größe stark begrenzt sind. Dadurch ergibt sich als wesentlicher Nachteil, daß die Begrenzung in den Abmessungen der Ringbandagen deren Einsatz bisher nur in relativ kleinen Preßwalzen zugelassen hat. Zur Zeit können durch HIP-Anlagen Bandagendurchmesser von ca. 1 m, in Ausnahmefällen bis ca. 1,2 m, hergestellt werden. Der Anwendungsbereich solcher Bandagen soll sich jedoch auch auf das Brikettierpressen, Kompaktieren, die Gutbettzerkleinerung, Mahlwerke und zahlreiche andere Verfahren erstrecken lassen. Hierzu sind aus wirtschaftlichen Gründen jedoch oftmals größere Bandagendurchmesser erforderlich.Such workpieces, in particular ring bandages, on a Roll body of a press roll are applied, are in the state technology through hot isostatic pressing (HIP) been made. The for the hot isostatic pressing process usable materials have very good Wear properties, which is why manufactured Ring bandages should preferably be used. The however, hot isostatic presses take place at high pressure and high temperature, as evenly as possible on the whole Workpiece to be applied, so that for it suitable devices (HIP systems) strong in size are limited. This results in a major disadvantage that the limitation in the dimensions of the ring bandages Previously only used in relatively small press rolls Has. At the moment, drum diameters of approx. 1 m, in exceptional cases up to approx. 1.2 m. The field of application of such bandages should also, however on briquetting, compacting, Material bed shredding, grinders and numerous others Allow proceedings to be extended. This is from economic However, often cause larger bandage diameters required.
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Verfahren der eingangs genannten Art bereitzustellen, durch das ringförmige Werkstücke mit Abmessungen hergestellt werden können, die oberhalb der größtmöglichen durch die HIP-Anlage herzustellenden Abmessungen liegen. It is therefore the object of the present invention To provide methods of the type mentioned at the outset the ring-shaped workpieces are made with dimensions can be above the largest possible through the HIP system dimensions to be produced.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein Ringrohling durch den heißisostatischen Preßvorgang mit durch die HIP-Anlage vorgegebenen Abmessungen hergestellt wird, der anschließend durch einen Warmformvorgang auf andere, bevorzugt größere, Abmessungen gebracht wird.This object is achieved in that a Ring blank through through the hot isostatic pressing process the HIP system is manufactured to predetermined dimensions, the then by thermoforming onto others, preferably larger, dimensions is brought.
Aus der US-A-3982904 ist ein Verfahren zur Herstellung von Metallringen bekannt. Bei diesem Verfahren wird ein pulverförmiges Material in eine hohlwandige Hülse eingefüllt. Das pulverförmige Material kann vor einer Bearbeitung der Hülse durch beispielsweise eine Ringwalze in der Hülse verkapselt und dort für eine Heißverdichtung erwärmt und unter Druck gesetzt werden. Anschließend wird die Hülse mit dem verdichteten pulverförmigen Material durch die Ringwalze radial aufgeweitet.From US-A-3982904 a method for the production of Known metal rings. This procedure uses a Powdery material filled into a hollow-walled sleeve. The powdery material can be processed before Sleeve by, for example, a ring roller in the sleeve encapsulated and heated there for hot compression and under Pressure. Then the sleeve with the compacted powdery material by the ring roller radially expanded.
Erfindungsgemäß wird statt dessen ein durch das HIP-Verfahren hergestellter Ringrohling ohne Kapsel, Hülse oder dergleichen weiter verarbeitet. Eine Verdichtung des gemäß US-A-3982904 in die Hülse eingefüllten Pulvers in einem anschließenden Formvorgang ist erfindungsgemäß folglich keineswegs vorgesehen, da mit einem fertigen Rohling nach HIP-Verfahren gearbeitet wird.According to the invention, the HIP method is used instead manufactured ring blank without capsule, sleeve or the like processed further. A compression of the according to US-A-3982904 in the sleeve filled powder in a subsequent Molding process is therefore in no way according to the invention provided because with a finished blank according to the HIP process is worked.
Nach dem heißisostatischen Pressen weist der Ringrohling noch eine sehr gute Plastizität auf, die für einen anschließenden Warmformvorgang in vorteilhafter Weise genutzt werden kann. Dadurch können relativ kostengünstig durch den Warmformvorgang andere Abmessungen oder Profilierungen, als durch die HIP-Anlage vorgegeben, hergestellt werden. Somit können die durch die HIP-Anlage vorgegebenen Abmessungsbegrenzungen der ringförmigen Werkstücke relativ kostengünstig überwunden werden. Dies spielt auch bei kleineren Abmessungen eine entscheidende Rolle, da HIP-Anlagen sehr aufwendig gestaltet und teuer sind. Bei einigen HIP-Werkstoffen hat der Warmformvorgang zusätzlich noch eine Gefügeverbesserung zur Folge. Günstigerweise kann der Rohling im Durchmesser vergrößert werden, da sich dadurch für Ringbandagen die entsprechenden Kostenvorteile ergeben.After hot isostatic pressing, the ring blank still shows a very good plasticity for a subsequent one Thermoforming can be used in an advantageous manner. This can be done relatively inexpensively through the thermoforming process other dimensions or profiles than those of the HIP system specified, manufactured. Thus, the through the HIP system specified dimensional limits of the annular workpieces overcome relatively inexpensive become. This plays a role even with smaller dimensions decisive role, since HIP systems are very complex and are expensive. For some HIP materials, the Thermoforming process also a structural improvement for Episode. Conveniently, the blank can have a diameter be enlarged, because this is the ring bandages corresponding cost advantages result.
Durch die Erfindung können Vergrößerungen erzielt werden, die im Bereich von größer 1:1 bis 3:1, bevorzugt größer 1:1 bis 2:1, liegen. Das bedeutet zum Beispiel für eine HIP-Anlage, die Bandagen mit 1 m Durchmesser herstellen kann, daß eine Aufweitung auf einen Durchmesser von 2 zu erfolgen kann. Eine derart drastische Vergrößerung des Rohlings vergrößert den Anwendungsbereich der Ringbandagen um ein beträchtliches.Enlargements can be achieved by the invention in the range from greater than 1: 1 to 3: 1, preferably greater than 1: 1 to 2: 1. For example, for a HIP system, can produce the bandages with a diameter of 1 m that a Can be expanded to a diameter of 2. A such drastic enlargement of the blank increases the Application of the ring bandages by a considerable amount.
Bei einer weiteren Ausführungsform ist der Rohling im wesentlichen vollständig aus einem HIP-Werkstoff hergestellt. Selbstverständlich stellt der Rohling genügend Material bereit, um die nach dem Warmformen notwendigen Abmessungen der Ringbandage zu erlangen.In a further embodiment, the blank is in essentially made entirely from a HIP material. Of course, the blank provides enough material ready to the necessary dimensions after the thermoforming Obtain ring bandage.
Eine weitere Ausführungsform sieht vor, daß der Rohling aus einem auf einen geeigneten Grundwerkstoff aufgebrachten HIP-Werkstoff hergestellt wird, wobei der Grundwerkstoff bezüglich des Warmformvorgangs auf den HIP-Werkstoff abgestimmte Eigenschaften aufweist. Als Grundwerkstoff kommt insbesondere Stahl in Frage. Wichtig ist hierbei, daß das Material Eigenschaften aufweist, die beim Warmformvorgang nicht zum Ablösen der HIP-Schicht von diesem führt. Diesen Umständen kann natürlich auch durch entsprechende Warmformbedingungen entgegengewirkt werden. Entscheidend sind jedoch im wesentlichen die Eigenschaften der Werkstoffe.Another embodiment provides that the blank from a HIP material applied to a suitable base material is produced, the base material with respect of the thermoforming process matched to the HIP material Has properties. In particular, comes as the base material Steel in question. It is important that the material Features that are not in the thermoforming process Detaching the HIP layer from this leads. These circumstances can of course also by appropriate thermoforming conditions be counteracted. However, the decisive factors are essential the properties of the materials.
Bei einer weiteren Ausführungsform müssen die Werkstoffe ebenfalls aufeinander abgestimmt werden, damit beim Warmformvorgang der Verbund erhalten bleibt. Hierbei wird der Rohling aus unterschiedlichen HIP-Verbundmaterialien hergestellt, so daß die spätere Bandage an verschiedenen Bereichen, z.B. am Innen- und Außenumfang unterschiedliche Materialien aufweisen. In another embodiment, the materials can also be coordinated with each other so that the The thermoforming process of the composite is retained. Here the Blank from different HIP composite materials manufactured so that the later bandage on different Areas, e.g. different on the inner and outer circumference Have materials.
Eine einfache Art und Weise den Warmformvorgang auszuführen besteht darin, daß der Rohling während des Warmformvorgangs durch Schmieden über einen Dorn und/oder Aufweiten über einen Konus vergrößert wird. Diese Ausführungsform eignet sich insbesondere bei der Herstellung kleinerer Abmessungen.An easy way to do the thermoforming process is that the blank during the thermoforming process by forging over a mandrel and / or expanding over one Cone is enlarged. This embodiment is suitable especially in the manufacture of smaller dimensions.
Um größere Abmessungen herzustellen, kann der Warmformvorgang günstigerweise durch Ringwalzen erfolgen.The thermoforming process can be used to produce larger dimensions conveniently done by ring rolling.
Hierbei kann darauf geachtet werden, daß beim Ringwalzen im wesentlichen lediglich eine Radialaufweitung des Rohlings erfolgt, so daß die Axialabmessungen im wesentlichen beibehalten werden, wenn dies gefordert ist.It can be ensured that ring rolling in essentially only a radial expansion of the blank takes place so that the axial dimensions essentially be maintained if required.
Die Verwendung einer Ringwalze mit einer auf den Außenumfang des Rohlings aufdrückenden Hauptwalze und einer auf dem Innenumfang des Rohlings aufdrückenden Walzendorn hat sich als besonders günstige Variante erwiesen. Hierdurch kann nämlich durch die Auswahl der Durchmesser und des Durchmesserverhältnisses von Hauptwalze und Walzendorn der Abwalzungsgrad am Innen- und Außenumfang eingestellt werden. Dies ist insbesondere dann von großem Vorteil, wenn der Rohling aus mehreren HIP-Verbundmaterialien, die unterschiedliche Walzbedingungen erfordern, hergestellt werden soll. So kann z.B. am Innenumtang durch einen dünneren Walzendorn eine größere Abwalzung erfolgen.The use of a ring roller with one on the outer circumference of the blank pressing main roller and one on the The inner circumference of the roll mandrel that has been pressed open has proven to be proven particularly favorable variant. This can namely by choosing the diameter and the Diameter ratio of main roll and roll mandrel Rolling degree can be set on the inner and outer circumference. This is particularly advantageous if the Blank from several HIP composite materials, the require different rolling conditions should. For example, on the inside by a thinner one Roll mandrel a larger roll.
Durch das Ringwalzen kann auch eine eventuell geforderte Profilierung des ringförmigen Werkstückes erzeugt werden. Eine derartige Profilierung hängt von dem jeweiligen Einsatzzweck der Ringbandage ab.Ring rolling may also be required Profiling of the annular workpiece can be generated. A such profiling depends on the particular application the ring bandage.
Bei einer weiteren Variante kann der Warmformvorgang durch Walzen der Stirnflächen des Rohlings erfolgen, was insbesondere den Vorteil mit sich bringt, daß auch in Axialrichtung des ringförmigen Werkstücks unterschiedliche HIP- oder HIP- und Grundwerkstoffe miteinander verbunden werden können.In a further variant, the thermoforming process can be carried out Rolling the face of the blank is done what has the particular advantage that also in Axial direction of the annular workpiece different HIP or HIP and base materials bonded together can be.
Des weiteren bezieht sich die Erfindung auf eine Ringbandage
für Preßwalzen, die durch ein Verfahren gemäß einem der
Ansprüche 1 bis 11 hergestellt ist.Furthermore, the invention relates to a ring bandage
for press rolls by a method according to one of the
Bei solchen Ringbandagen ist es von besonderem Vorteil, wenn der Enddurchmesser größer ist, als der größte durch die HIP-Anlage herzustellende Durchmesser eines Rohlings.With such ring bandages, it is particularly advantageous if the final diameter is larger than the largest due to the HIP system diameter of a blank to be produced.
Ergänzend sei nochmals darauf hingewiesen, daß die guten Verschleißeigenschaften des HIP-Werkstoffes, und dessen durch das heißisostatische Pressen erlangter Zusammenhalt durch die Warmformung im Bereich der gängigen Schmiedetemperaturen (z.B. 1000 bis 1200°C) nicht nachteilig beeinflußt werden. Die Erfindung stellt somit ein sehr wirtschaftliches Verfahren zur Herstellung ringförmiger Werkstücke größerer Abmessungen bereit.In addition, it should be pointed out again that the good Wear properties of the HIP material, and its through the hot isostatic pressing achieved cohesion through the Hot forming in the range of common forging temperatures (e.g. 1000 to 1200 ° C) are not adversely affected. The The invention thus provides a very economical method Production of ring-shaped work pieces of larger dimensions ready.
Im folgenden werden Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert. Es zeigt:
- Fig. 1
- einen Rohling und eine fertige Bandage einer ersten Ausführungsform in einer Querschnittsansicht,
- Fig. 2
- eine schematische Ansicht des Warmformvorganges zur Herstellung der Bandage aus Fig. 1,
- Fig. 3
- einen Rohling und eine fertige Bandage einer zweiten Ausführungsform in einer Querschnittsansicht und
- Fig. 4
- eine weitere Ausführungsform einer Ringbandage in einer Querschnittsansicht.
- Fig. 5
- einen Rohling und eine fertige Bandage einer weiteren Ausführungsform einer Querschnittsansicht.
- Fig. 1
- a blank and a finished bandage of a first embodiment in a cross-sectional view,
- Fig. 2
- 2 shows a schematic view of the thermoforming process for producing the bandage from FIG. 1,
- Fig. 3
- a blank and a finished bandage of a second embodiment in a cross-sectional view and
- Fig. 4
- a further embodiment of a ring bandage in a cross-sectional view.
- Fig. 5
- a blank and a finished bandage of a further embodiment of a cross-sectional view.
In der Fig. 1 ist ein ringförmiger Rohling 1 und eine aus
diesem hergestellte Ringbandage 2 dargestellt. Der Rohling 1
weist einen Außendurchmesser DR und einen Innendurchmesser dR
auf und besteht aus einem einzigen HIP-Werkstoff. Die
Herstellung des Rohlings 1 erfolgt durch heißisostatisches
Pressen mittels hohem Druck und hohen Temperaturen in einer
nicht dargestellten HIP-Anlage. Die z.Zt. größtmöglich
herzustellenden Durchmesser DR von ringförmigen Werkstücken
liegen ungefähr bei 1,2 m. Während des Warmformvorganges wird
der Rohling 1 zur Bandage 2 umgeformt. Die Bandage 2 weist
einen Außendurchmesser DB und einen Innendurchmesser dB auf.
Die Vergrößerung der Durchmesser von Rohling 1 zur Bandage 2
beträgt bei dieser Ausführungsform etwa 1,7:1. Der Rohling 1
weist entsprechende dickere Wandstärken auf, damit bei der
Bandage 2 die entsprechend erforderliche Wandstärke erreicht
wird. Die erforderliche Materialmenge an HIP-Werkstoff hängt
im wesentlichen von den Volumenverhältnissen ab.1 shows an annular blank 1 and an
Die in Fig. 2 gezeigte schematische Vorrichtung zum Warmformen
umfaßt eine angetriebene Hauptwalze 3, die auf dem Außenumfang
4 des Rohlings aufsitzt und einen auf den Innenumfang 5 des
Rohlings 1 aufgepreßten Walzendorn 6. Zusätzlich sind zur
Einhaltung der Axialmaße des Rohlings 1 Axialwalzen 7
vorgesehen. Die Hauptwalze 3 weist einen Durchmesser dH und
der Walzendorn einen Durchmesser dW auf. Durch die Auswahl
geeigneter Durchmesser dH und dW läßt sich der Abwalzungsgrad
an Innen- und Außenumfang 5,4 beeinflussen, wodurch die
Verformung entsprechend am Außen- und Innenumfang 4,5
optimiert wird. Hierbei spielt auch das Durchmesserverhältnis
zwischen Hauptwalze 3 und Walzdorn 6 eine maßgebliche Rolle.The schematic device for thermoforming shown in FIG. 2 comprises a driven
Der Rohling 1 wird, wie in Fig. 2 zu erkennen ist,
kontinuierlich vom Warmumformwerkzeug auf die Abmaße der
Ringbandage 2 gewalzt. Durch den relativ plastischen HIP-Werkstoff,
der sich bei diesen Umformvorgang ungefähr auf
Schmiedetemperatur befindet entsteht eine Ringbandage 2 von
guten Gefügeaufbau und genauen Abmessungen.The blank 1, as can be seen in FIG. 2,
continuously from the hot forming tool to the dimensions of the
In Fig. 3 ist ein Rohling 1 sowie eine Ringbandage 2 zu sehen,
die aus zwei verschiedenen HIP-Werkstoffen 8 und 9, die
jeweils ringförmig angrenzend aneinander angeordnet sind,
aufgebaut ist. Die Werkstoffe 8, 9 sind durch das
heißisostatische Pressen in eine zur Weiterbehandlung
günstigen maßlichen Anordnung gebracht worden. Bei derartigen
Verbundstoffen ist es sehr wichtig, daß die beiden HIP-Werkstoffe
8, 9 aufeinander abgestimmt sind, so daß z.B. ein
Voreilen des äußeren Werkstoffes 8 während des
Warmformvorgangs und somit ein Lösen der beiden Werkstoffe 8,
9 voneinander nicht stattfindet. Bei dieser Ausführungsform
eignet sich die in Fig. 2 gezeigte Vorrichtung ganz besonders.
Durch die Abstimmung der Durchmesser von Hauptwalze 3 und
Walzdorn 6 aufeinander können beide Werkstoffe 8, 9 mit
unterschiedlichem Abwalzungsgrad verformt werden. Hierdurch
wird gewährleistet, daß während der Warmformung sich die
beiden Werkstoffe 8, 9 nicht voneinander lösen und der feste
Verbund auch bei der fertigen Ringbandage 2 erhalten bleibt.
Die endgültigen Dicken der Schichten der Werkstoffe 8, 9 muß
bereits beim Rohling 1 entsprechend Berücksichtigung finden.3 shows a blank 1 and a
In Fig. 4 ist eine weitere Ausführungsform einer Ringbandage 2
gezeigt, die eine Profilierung aufweist. Der Rohling 1 kann
eine entsprechende Vorform aufweisen, aus der dann mittels
Warmformung auf die Abmessungen der Ringbandage 2 geformt
wird. Die Hauptwalze 3 und der Walzdorn 6 weisen ebenfalls
entsprechende Profilierung auf. Somit können die
unterschiedlichsten Profilierungen am Außen- und Innenumfang
4, 5 erzeugt werden, die den unterschiedlichsten Anwendungen
zugute kommen.4 shows a further embodiment of a
In Figur 5 ist ein Rohling 1 und eine Ringbandage dargestellt, bei der zwei Werkstoffe axial hintereinander angeordnet sind. Hierbei kommt sowohl die Kombination von mehreren HIP-Werkstoffen als auch von einen HIP- mit einen anderen Grundwerkstoff in Frage. Der Warmformvorgang kann demnach durch eine hauptsächlich axiale Abwalzung entlang der Stirnflächen erfolgen.FIG. 5 shows a blank 1 and an annular bandage, in which two materials are arranged axially one behind the other. Here comes the combination of several HIP materials as well as from one HIP with another Base material in question. The thermoforming process can accordingly by mainly axial rolling along the End faces.
Derartige Bandagen werden z.B. für Brikettierpressen,
Kompaktiermaschinen, Maschinen zur Gutbettzerkleinerung, für
Mühlen und zahlreiche andere Anwendungen eingesetzt.
Insbesondere können die Bandagen 2 mit speziellen
Eigenschaften für die unterschiedlichsten Anwendungen
ausgeführt sein.Such bandages are e.g. for briquetting presses,
Compacting machines, machines for material bed shredding, for
Mills and numerous other applications are used.
In particular, the
Claims (13)
- A method for producing large shroud rings (2), in particular for wear-resistant press rolls, by means of a hot isostatic pressing process, characterized in that a finished annular blank (1) having dimensions which are predetermined by the HIP plant is produced by means of the hot isostatic pressing process, said annular blank (1) being subsequently subjected to a hot-forming process so as to obtain larger diameter dimensions.
- A method according to claim 1, characterized in that the enlargement is in the range larger than 1:1 to 3:1, preferably larger than 1:1 to 2:1.
- A method according to claim 1 or 2, characterized in that the blank (1) is produced such that essentially the whole blank consists of an HIP material.
- A method according to one of the claims 1 to 2, characterized in that the blank (1) is produced from an HIP material which is applied to a suitable basic material, said basic material having properties which match the HIP material with regard to the hot-forming process.
- A method according to one of the claims 1 to 2, characterized in that the blank (1) is produced from different HIP composite materials (8, 9).
- A method according to one of the claims 1 to 5, characterized in that the blank (1) is enlarged during the hot-forming process by forging over a mandrel and/or by expanding over a cone.
- A method according to one of the claims 1 to 6, characterized in that the hot-forming process is carried out by ring rolling.
- A method according to claim 7, characterized in that it is essentially only a radial expansion of the blank (1) that takes place during the hot-forming process.
- A method according to claim 7 or 8, characterized in that the ring rolling is carried out by means of a main roll (3) pressing onto the outer circumference (4) of the blank (1) and by means of a rolling mandrel (6) pressing onto the inner circumference (5) of the blank (1), the degree of rolling down on the inner and outer circumferences (5, 4) being adjusted by the selection of the diameters (dH, dW) and of the diameter ratio of main roll (3) to rolling mandrel (6).
- A method according to one of the claims 7 to 9, characterized in that, at least by means of said ring rolling, the annular workpiece is provided with a profile.
- A method according to one of the claims 1 to 6, characterized in that the hot-forming process is carried out by rolling the end faces of the blank (1).
- A shroud ring for press rolls, characterized in that it is produced by a method according to one of the claims 1 to 11.
- A shroud ring according to claim 12, characterized in that the final diameter of said shroud ring is larger than the maximum diameter (DR) of a blank (1) that can be produced by the HIP plant.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19536507A DE19536507A1 (en) | 1995-09-29 | 1995-09-29 | Process for producing large ring-shaped workpieces |
| DE19536507 | 1995-09-29 | ||
| PCT/EP1996/004237 WO1997012710A1 (en) | 1995-09-29 | 1996-09-27 | Method of producing large annular workpieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0852525A1 EP0852525A1 (en) | 1998-07-15 |
| EP0852525B1 true EP0852525B1 (en) | 1999-12-29 |
Family
ID=7773699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96934481A Expired - Lifetime EP0852525B1 (en) | 1995-09-29 | 1996-09-27 | Method of producing large annular workpieces |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0852525B1 (en) |
| JP (1) | JP3150705B2 (en) |
| AU (1) | AU7282196A (en) |
| DE (2) | DE19536507A1 (en) |
| WO (1) | WO1997012710A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315945B1 (en) | 1997-07-16 | 2001-11-13 | The Dow Chemical Company | Method to form dense complex shaped articles |
| FR2952558A1 (en) * | 2009-11-19 | 2011-05-20 | Creusot Forge | PROCESS FOR PRODUCING A TUBULAR METAL PIECE |
| CN106623704A (en) * | 2016-12-01 | 2017-05-10 | 贵州安大航空锻造有限责任公司 | Manufacturing method of low stress 2A70 aluminum alloy ring piece |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010010321A1 (en) | 2010-03-04 | 2011-09-08 | Carl Aug. Picard Gmbh & Co. Kg | Hot isostatically pressed composite body, process for its preparation and its use |
| CN104191166B (en) * | 2014-08-04 | 2016-08-24 | 贵州航宇科技发展股份有限公司 | A kind of roll-forming method of aluminium alloy height cylinder thin-walled ring |
| DE102015111093B4 (en) * | 2015-07-09 | 2020-04-23 | Benteler Steel/Tube Gmbh | Round or polygonal block for producing a seamless hot-rolled pipe product, pipe product and method for producing a pipe product |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3982904A (en) * | 1973-06-27 | 1976-09-28 | Viking Metallurgical Corporation | Metal rings made by the method of particle ring-rolling |
| JPH02310303A (en) * | 1989-05-25 | 1990-12-26 | Sumitomo Metal Ind Ltd | Manufacture of seamless pipe |
| FR2687337B1 (en) * | 1992-02-13 | 1994-04-08 | Valtubes | PROCESS FOR PRODUCING TUBES BY HOT WORKING OF METAL POWDERS AND TUBES THUS OBTAINED. |
-
1995
- 1995-09-29 DE DE19536507A patent/DE19536507A1/en not_active Withdrawn
-
1996
- 1996-09-27 WO PCT/EP1996/004237 patent/WO1997012710A1/en active IP Right Grant
- 1996-09-27 JP JP51395897A patent/JP3150705B2/en not_active Expired - Fee Related
- 1996-09-27 DE DE59604060T patent/DE59604060D1/en not_active Expired - Fee Related
- 1996-09-27 EP EP96934481A patent/EP0852525B1/en not_active Expired - Lifetime
- 1996-09-27 AU AU72821/96A patent/AU7282196A/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315945B1 (en) | 1997-07-16 | 2001-11-13 | The Dow Chemical Company | Method to form dense complex shaped articles |
| FR2952558A1 (en) * | 2009-11-19 | 2011-05-20 | Creusot Forge | PROCESS FOR PRODUCING A TUBULAR METAL PIECE |
| WO2011061444A3 (en) * | 2009-11-19 | 2011-08-18 | Creusot Forge | Method for manufacturing a tubular metal part |
| CN106623704A (en) * | 2016-12-01 | 2017-05-10 | 贵州安大航空锻造有限责任公司 | Manufacturing method of low stress 2A70 aluminum alloy ring piece |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59604060D1 (en) | 2000-02-03 |
| AU7282196A (en) | 1997-04-28 |
| JP3150705B2 (en) | 2001-03-26 |
| DE19536507A1 (en) | 1997-04-03 |
| JPH11500493A (en) | 1999-01-12 |
| EP0852525A1 (en) | 1998-07-15 |
| WO1997012710A1 (en) | 1997-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60036608T2 (en) | METHOD AND DEVICE FOR COMPACTING METAL POWDER PREFORMS | |
| DE2409668A1 (en) | METHOD OF COMPRESSING A METAL POWDER COMPACT AND THE DEVICE AND COMPACT FOR CARRYING OUT THIS PROCESS | |
| DE60007857T2 (en) | Method of compacting the wall of an opening of a metallic powder blank | |
| WO2011003501A1 (en) | Method and apparatus for ironing roller spinning | |
| DE3336581A1 (en) | MULTIPLE V-BELT DISC AND METHOD FOR THEIR PRODUCTION | |
| WO2020207960A1 (en) | Method for producing a hollow shaft | |
| DE3641695C2 (en) | Process for the shaping production of hollow bodies from solid semi-finished products | |
| EP1909990B1 (en) | Method and device for producing metal rings | |
| EP0852525B1 (en) | Method of producing large annular workpieces | |
| EP2012951A1 (en) | Procedure for manufacturing a toothed wheel | |
| EP0955110B1 (en) | Method and device for flow-turning | |
| DE2938812A1 (en) | METHOD FOR PRODUCING A ROLLER BEARING RING | |
| EP0266712B1 (en) | Method and device for manufacturing friction elements, especially synchronizing parts in motor vehicle transmissions | |
| DE4410146A1 (en) | Method and device for producing press fittings | |
| DE19915027A1 (en) | Forming gear element for starter motor, and resultant gear element, with successively diminishing wall thickness of element obtained by combined radial and axial motion of at least one adjustable roll of pressure rolling machine | |
| EP1024913B1 (en) | Method and device for producing a shaft from a tubular workpiece | |
| DE10054399A1 (en) | Method and device for producing a workpiece with internal teeth, in particular a ring gear | |
| DE10027703A1 (en) | Process for hot and cold deformation, especially extrusion of a metallic workpiece uses a matrix excited using an oscillating device relative to the workpiece | |
| DE102016115798B3 (en) | Method and device for producing piston rings | |
| DE3117200A1 (en) | Method of producing rings and discs | |
| DE10204054C1 (en) | Wheel rim, for a pneumatic tire, is produced from a welded tube section cold shaped with a partially different wall thickness as a bed to be bonded to a dish where the wall is thicker with a compressed beading rolled into a surface | |
| DE19632279C2 (en) | Process for manufacturing a disc-shaped part | |
| EP0893177B1 (en) | Method for the production of a toothed workpiece | |
| DE102017130680B4 (en) | Die for a press and method for producing at least one green compact with such a press | |
| DE3535811A1 (en) | Method for the production by forming of annular pressed parts, in particular inner races of rolling bearings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19980327 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| 17Q | First examination report despatched |
Effective date: 19990319 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19991229 |
|
| REF | Corresponds to: |
Ref document number: 59604060 Country of ref document: DE Date of ref document: 20000203 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050822 Year of fee payment: 10 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20060927 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060927 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20070924 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20070914 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20081030 Year of fee payment: 13 |
|
| BERE | Be: lapsed |
Owner name: MASCHINENFABRIK *KOPPERN G.M.B.H. & CO. K.G. Effective date: 20080930 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20090529 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100401 |