EP1477248A2 - Method of manufacturing a hollow body as semi-finished product for a crucible or casting roll - Google Patents

Method of manufacturing a hollow body as semi-finished product for a crucible or casting roll Download PDF

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Publication number
EP1477248A2
EP1477248A2 EP04007496A EP04007496A EP1477248A2 EP 1477248 A2 EP1477248 A2 EP 1477248A2 EP 04007496 A EP04007496 A EP 04007496A EP 04007496 A EP04007496 A EP 04007496A EP 1477248 A2 EP1477248 A2 EP 1477248A2
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EP
European Patent Office
Prior art keywords
block
hollow body
mandrel
crucible
expanded
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
Application number
EP04007496A
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German (de)
French (fr)
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EP1477248B1 (en
EP1477248A3 (en
Inventor
Fred Riechert
Hans-Günter Dr. Wobker
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KM Europa Metal AG
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KM Europa Metal AG
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Publication of EP1477248A2 publication Critical patent/EP1477248A2/en
Publication of EP1477248A3 publication Critical patent/EP1477248A3/en
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Publication of EP1477248B1 publication Critical patent/EP1477248B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/06—Shaping thick-walled hollow articles, e.g. projectiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets

Definitions

  • the invention relates to a method for producing a cylindrical hollow body made of copper or a copper alloy as a semi-finished product for a crucible or a Casting roll according to the features in the preamble of claim 1.
  • a common method for producing a cylindrical hollow body as a semi-finished product for a crucible or a casting roll the steps of casting-punching-forging are used together.
  • a continuously cast block in the longitudinal direction compressed The maximum is so that the block does not buckle when compressed Ratio of its length to its diameter about 3: 1.
  • the compressed block will then the aid of a piercing mandrel over its entire length as seen in the direction of the upset Extension punched.
  • the perforated block is then heated again and in this second heat Forging expanded over a mandrel.
  • the expanded block is then usually made into one by open-die forging Formed hollow body with or without flange, depending on whether from this In the end, a crucible or a casting roller is to be manufactured.
  • a crucible or a casting roller is to be manufactured.
  • the invention is based on the object Process for producing a cylindrical hollow body made of copper or a To create copper alloy as a semi-finished product for a crucible or a casting roller, the more economical application with improved material properties guaranteed.
  • the hollow body produced in this way can then be turned into a crucible or a conventional manner Casting roller can be redesigned further.
  • the invention therefore creates the conditions for the Total degree of deformation and the homogeneity of the deformation due to Process steps punching the cylindrical block with the following Drawing presses can be significantly improved. Due to the higher dimensional accuracy there are also significantly smaller additions of lost material. The Efficiency is significantly increased.
  • cylindrical hollow bodies as semi-finished products a crucible or a casting roll by rounding and longitudinal seam welding of To manufacture sheets.
  • the invention has the additional advantage that the material properties over the entire scope of the Hollow body are homogeneous.
  • the combination of expanding the block and stretching the Crystal orientation of the hollow body to be manufactured can be influenced so that a Orientation of the grain structure in the longitudinal or transverse direction arises. So it can Grain orientation and thus the strength through this way of Main direction of stress can be adjusted. Accordingly, in particular better service life can be expected from casting rolls made from hollow bodies.
  • FIG. 1 is a cylindrical block made of SF-Cu, CuAg, CuNi or one precipitation-hardening Cu alloy. Block 1 is continuously cast. The ratio of the length L to the diameter D is up to about 6: 1.
  • the block 1 according to FIG. 1 is divided into a corresponding to the representation of FIG Die 2 used, which is located in a receptacle 3.
  • Block 1 is in broken lines shown.
  • the Die 2 prevents block 1 from buckling during upsetting.
  • the compressed block 1 a Center punch 4 pressed in according to arrow PF1 and block 1 a perforated.
  • the material of the perforated block 1 b then rises between the inner wall 5 of the die 2 and the surface 6 of the piercing mandrel 4 upwards in a hollow cylinder.
  • the Punching in the direction of arrow PF1 is carried out in such a way that on the punched block 1 b a bottom 7 remains.
  • the perforated block 1 b is then used in accordance with the illustration in FIG an expanding mandrel 8 which is moved in the direction of the arrow PF2, wherein its inner diameter changes from ID to ID1 and its outer diameter changes from AD Increase AD1.
  • the block 1b to be expanded is based on one Abutment plate 9 from.
  • the stretching can be done so that the expanded block 1 c is not complete is moved by the drawing die 11, so that then at the free end 13 of the Hollow body 12 a collar 14 is formed.
  • This collar 14 can be used to weld a Flange are used.

Abstract

The blank producing process involves casting a cylindrical block (1c) and forging and piercing it while it is radially supported, leaving a bottom. It is then spread by a mandrel and finally deformed by a drawing die (11) and a mandrel (10), producing the hollow body (12). All deforming stages take place under heat. With the block spread out, a bond (14) can be created on the hollow body.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines zylindrischen Hohlkörpers aus Kupfer oder einer Kupferlegierung als Halbzeug für einen Tiegel oder eine Gießwalze gemäß den Merkmalen im Oberbegriff des Patentanspruchs 1.The invention relates to a method for producing a cylindrical hollow body made of copper or a copper alloy as a semi-finished product for a crucible or a Casting roll according to the features in the preamble of claim 1.

Ein übliches Verfahren zur Herstellung eines zylindrischen Hohlkörpers als Halbzeug für einen Tiegel oder eine Gießwalze setzt sich aus den Schritten Gießen-Lochen-Schmieden zusammen. Zunächst wird ein stranggegossener Block in Längsrichtung gestaucht. Damit der Block beim Stauchen nicht knickt, beträgt das maximale Verhältnis seiner Länge zu seinem Durchmesser etwa 3:1. Der gestauchte Block wird anschließend Hilfe eines Lochdorns über seine gesamte in Stauchrichtung gesehene Erstreckung gelocht.A common method for producing a cylindrical hollow body as a semi-finished product for a crucible or a casting roll, the steps of casting-punching-forging are used together. First, a continuously cast block in the longitudinal direction compressed. The maximum is so that the block does not buckle when compressed Ratio of its length to its diameter about 3: 1. The compressed block will then the aid of a piercing mandrel over its entire length as seen in the direction of the upset Extension punched.

Der gelochte Block wird daraufhin nochmals erwärmt und in dieser 2. Wärme durch Schmieden über einen Dorn aufgeweitet. Je nach den Gegebenheiten muss zum ordnungsgemäßen Aufweiten der gelochte Block in einer 3. Wärme gegebenenfalls nochmals temperiert werden.The perforated block is then heated again and in this second heat Forging expanded over a mandrel. Depending on the circumstances, the Properly widen the perforated block in a 3rd heat if necessary be tempered again.

Der aufgeweitete Block wird danach in der Regel durch Freiformschmieden zu einem Hohlkörper mit oder ohne Flansch umgeformt, und zwar je nachdem, ob aus diesem Halbzeug letztlich ein Tiegel oder eine Gießwalze gefertigt werden soll. In diesem Zusammenhang kann es notwendig sein, den aufgeweiteten gelochten Block mehrmals hintereinander zu erwärmen. The expanded block is then usually made into one by open-die forging Formed hollow body with or without flange, depending on whether from this In the end, a crucible or a casting roller is to be manufactured. In this Context it may be necessary to expand the perforated block to heat several times in a row.

Im Hinblick auf den Sachverhalt, dass für ein ordnungsgemäßes Stauchen der gegossene Block nur eine Länge aufweisen darf, die etwa dem Dreifachen seines Durchmessers entspricht, um ein Knicken des Blocks zu vermeiden, resultieren aus dem dadurch bedingten Einsatz großer Blockabmessungen nur geringe Umformgrade. Folglich werden die erreichbaren Werkstoffeigenschaften beeinträchtigt.In view of the fact that for a proper upsetting of the cast block may only have a length that is about three times its length Diameter corresponds to, in order to avoid kinking of the block, result from the resulting use of large block dimensions only small Degrees of deformation. Consequently, the achievable material properties impaired.

Ein weiterer Nachteil besteht im bekannten Fall darin, dass während des Schmiedens durch die nur lokal wirkenden Schmiedekräfte eine inhomogene Umformung erzeugt wird. Hieraus resultieren Einbußen in den theoretisch erreichbaren Materialeigenschaften.Another disadvantage in the known case is that during the Forging is inhomogeneous due to the locally acting forging forces Forming is generated. This results in losses in the theoretical achievable material properties.

Darüber hinaus besteht durch das mehrfache Nachwärmen beim Aufweiten des gelochten Blocks und beim Langschmieden die Gefahr von Kornwachstum.In addition, there is multiple reheating when expanding the perforated blocks and in long forging the risk of grain growth.

Insgesamt ist das bekannte Verfahren aufgrund der nur begrenzten Bearbeitungsgenauigkeit mit der Bereitstellung größerer Materialmengen verbunden, was dazu führt, dass das sogenannte E/A-Verhältnis (Eintrags/Austrags-Verhältnis) im Bereich über 4 liegt. Das wirtschaftliche Ausbringen wird demnach gesenkt.Overall, the known method is limited due to the Machining accuracy combined with the provision of larger quantities of material, which leads to the so-called I / O ratio (entry / exit ratio) is in the range above 4. The economic output is therefore reduced.

Der Erfindung liegt - ausgehend vom Stand der Technik - die Aufgabe zugrunde, ein Verfahren zur Herstellung eines zylindrischen Hohlkörpers aus Kupfer oder einer Kupferlegierung als Halbzeug für einen Tiegel oder eine Gießwalze zu schaffen, das ein wirtschaftlicheres Ausbringen bei verbesserten Materialeigenschaften gewährleistet.Starting from the prior art, the invention is based on the object Process for producing a cylindrical hollow body made of copper or a To create copper alloy as a semi-finished product for a crucible or a casting roller, the more economical application with improved material properties guaranteed.

Diese Aufgabe wird mit den im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmalen gelöst. This object is achieved with the in the characterizing part of claim 1 specified features solved.

Aufgrund des Sachverhalts, dass nunmehr sowohl das Stauchen des gegossenen Blocks als auch das Lochen unter radialer Abstützung des Blocks durchgeführt werden, kann jetzt ein gegossener Block eingesetzt werden, der einen deutlich kleineren Durchmesser in Relation zu seiner Länge aufweist. Das Ausknicken des somit sehr schlanken Blocks kann beispielsweise in einer topfartigen Aufnahme mit einer inneren Matrize verhindert werden. Dadurch werden nicht nur höhere, sondern auch gleichmäßigere Umformgrade erreicht. Auch kann ein insgesamt kleinformatigerer Block zum Umformen bereit gestellt werden.Due to the fact that now both the upsetting of the cast Blocks as well as the punching carried out with radial support of the block a cast block can now be used, which makes one clear has a smaller diameter in relation to its length. The buckling of the thus very slim blocks can for example be in a pot-like receptacle an inner matrix can be prevented. This will not only be higher, but even more uniform degrees of deformation achieved. Even a total small-sized block to be provided for forming.

Mit den Verfahrensschritten Aufweiten durch einen Aufweitdorn und Abstrecken über einen Ziehdorn wird nochmals eine zusätzliche Umformung im äußeren Bereich der Wandung des Blocks und letztlich des Hohlkörpers erreicht, wodurch das Erzeugen eines feinkörnigen Gefüges begünstigt wird.With the process steps of expanding through an expanding mandrel and stretching over A drawing mandrel is again an additional deformation in the outer area of the Wall of the block and ultimately the hollow body reached, causing the generation a fine-grained structure is favored.

Der so gefertigte Hohlkörper kann dann in üblicher Weise zu einem Tiegel oder einer Gießwalze weiter umgestaltet werden.The hollow body produced in this way can then be turned into a crucible or a conventional manner Casting roller can be redesigned further.

Die Erfindung schafft mithin die Voraussetzungen dafür, dass der Gesamtumformgrad und die Homogenität der Umformung aufgrund der Verfahrensschritte Lochpressen des zylindrischen Blocks mit nachfolgendem Ziehpressen deutlich verbessert werden können. Durch die höhere Maßhaltigkeit sind auch deutlich kleinere Zugaben an Verlustmaterial verbunden. Die Wirtschaftlichkeit wird merklich heraufgesetzt.The invention therefore creates the conditions for the Total degree of deformation and the homogeneity of the deformation due to Process steps punching the cylindrical block with the following Drawing presses can be significantly improved. Due to the higher dimensional accuracy there are also significantly smaller additions of lost material. The Efficiency is significantly increased.

Es zählt ferner zum Stand der Technik, zylindrische Hohlkörper als Halbzeug für einen Tiegel oder eine Gießwalze durch Runden und Längsnahtschweißen von Blechen zu fertigen. Gegenüber diesem Verfahren hat die Erfindung den zusätzlichen Vorteil, dass die Materialeigenschaften über den gesamten Umfang des Hohlkörpers homogen sind. It is also part of the prior art to use cylindrical hollow bodies as semi-finished products a crucible or a casting roll by rounding and longitudinal seam welding of To manufacture sheets. Compared to this method, the invention has the additional advantage that the material properties over the entire scope of the Hollow body are homogeneous.

Generell kann durch die Kombination Aufweiten des Blocks und Abstrecken die Kristallorientierung des zu fertigenden Hohlkörpers so beeinflusst werden, dass eine Orientierung der Kornstruktur in Längs- oder Querrichtung entsteht. So kann die Kornorientierung und damit die Festigkeit über diesen Weg der Hauptbeanspruchungsrichtung angepasst werden. Demzufolge sind insbesondere bei aus Hohlkörpern hergestellten Gießwalzen bessere Standzeiten zu erwarten.In general, the combination of expanding the block and stretching the Crystal orientation of the hollow body to be manufactured can be influenced so that a Orientation of the grain structure in the longitudinal or transverse direction arises. So it can Grain orientation and thus the strength through this way of Main direction of stress can be adjusted. Accordingly, in particular better service life can be expected from casting rolls made from hollow bodies.

Das wirtschaftliche Ausbringen wird erfindungsgemäß dann noch weiter verbessert, wenn gemäß Patentanspruch 2 alle Umformschritte in einer Wärme durchgeführt werden. Diese Verfahrensweise ist durch die gezielte Kombination Lochpressen mit Ziehpressen erreichbar. Der Bereitstellungsaufwand an Wärmeenergie wird auf diese Weise erheblich gesenkt.The economic spreading is then further improved according to the invention, if, according to claim 2, all the forming steps are carried out in one heat become. This procedure is due to the targeted combination of punch presses Drawing presses reachable. The expenditure for providing heat energy is based on this Way significantly lowered.

Wenn entsprechend Patentanspruch 3 beim Abstrecken des aufgeweiteten Blocks ein Bund am Hohlkörper erzeugt wird, z.B. dadurch, dass beim Abstrecken der Block nicht komplett durch eine Ziehmatrize bewegt wird, so bietet ein solcher Bund eine ideale Voraussetzung für das Anschweißen eines Flansches, wenn aus dem hergestellten Hohlkörper letztlich ein Tiegel gefertigt werden soll.If according to claim 3 when stretching the expanded block a collar is created on the hollow body, e.g. by stretching the block is not completely moved by a drawing die, such a collar offers one ideal prerequisite for welding a flange, if from the produced hollow body ultimately a crucible is to be manufactured.

Die Erfindung ist nachfolgend anhand von Zeichnungen näher erläutert. Es zeigen:

Figur 1
in der Seitenansicht einen gegossenen zylindrischen Block;
Figur 2
im schematischen vertikalen Querschnitt eine Aufnahme mit Matrize für den Block der Figur 1;
Figur 3
im schematischen vertikalen Querschnitt die Aufnahme mit Matrize beim Lochen des Blocks;
Figur 4
im schematischen vertikalen Längsschnitt das Aufweiten des gelochten Blocks und
Figur 5
im schematischen vertikalen Längsschnitt das Abstrecken des aufgeweiteten Blocks.
The invention is explained in more detail below with reference to drawings. Show it:
Figure 1
in the side view a cast cylindrical block;
Figure 2
in a schematic vertical cross section, a holder with a die for the block of FIG. 1;
Figure 3
in the schematic vertical cross section, the recording with the die when punching the block;
Figure 4
in the schematic vertical longitudinal section the expansion of the perforated block and
Figure 5
in the schematic vertical longitudinal section the stretching of the expanded block.

Mit 1 ist in der Figur 1 ein zylindrischer Block aus SF-Cu, CuAg, CuNi oder einer ausscheidungshärtenden Cu-Legierung bezeichnet. Der Block 1 ist stranggegossen. Das Verhältnis der Länge L zum Durchmesser D beträgt bis etwa 6 : 1.1 in FIG. 1 is a cylindrical block made of SF-Cu, CuAg, CuNi or one precipitation-hardening Cu alloy. Block 1 is continuously cast. The ratio of the length L to the diameter D is up to about 6: 1.

Der Block 1 gemäß Figur 1 wird entsprechend der Darstellung der Figur 2 in eine Matrize 2 eingesetzt, die sich in einer Aufnahme 3 befindet. Der Block 1 ist in unterbrochener Linienführung dargestellt. Durch einen Stauchvorgang in Richtung des Pfeils PF wird der Block 1 in seinen Abmaßen verändert. Am Ende des Stauchvorgangs hat der Block 1a die Länge L1 und den Durchmesser D1. Die Matrize 2 verhindert ein Knicken des Blocks 1 beim Stauchen.The block 1 according to FIG. 1 is divided into a corresponding to the representation of FIG Die 2 used, which is located in a receptacle 3. Block 1 is in broken lines shown. By an upsetting process in the direction the dimensions of the arrow PF are changed. At the end of The upsetting process has the block 1a the length L1 and the diameter D1. The Die 2 prevents block 1 from buckling during upsetting.

Entsprechend der Darstellung der Figur 3 wird in den gestauchten Block 1 a ein Lochdorn 4 gemäß dem Pfeil PF1 zentrisch eingepresst und hierbei der Block 1 a gelocht. Das Material des gelochten Blocks 1 b steigt dann zwischen der Innenwand 5 der Matrize 2 und der Oberfläche 6 des Lochdorns 4 hohlzylindrisch aufwärts. Das Lochen in Richtung des Pfeils PF1 wird so durchgeführt, dass am gelochten Block 1 b ein Boden 7 verbleibt.According to the illustration in FIG. 3, the compressed block 1 a Center punch 4 pressed in according to arrow PF1 and block 1 a perforated. The material of the perforated block 1 b then rises between the inner wall 5 of the die 2 and the surface 6 of the piercing mandrel 4 upwards in a hollow cylinder. The Punching in the direction of arrow PF1 is carried out in such a way that on the punched block 1 b a bottom 7 remains.

Der gelochte Block 1 b wird danach entsprechend der Darstellung der Figur 4 mittels eines Aufweitdorns 8, der in Richtung des Pfeils PF2 bewegt wird, aufgeweitet, wobei sich sein Innendurchmesser von ID auf ID1 und sein Außendurchmesser von AD auf AD1 vergrößern. Der aufzuweitende Block 1b stützt sich hierbei an einer Widerlagerplatte 9 ab.The perforated block 1 b is then used in accordance with the illustration in FIG an expanding mandrel 8 which is moved in the direction of the arrow PF2, wherein its inner diameter changes from ID to ID1 and its outer diameter changes from AD Increase AD1. The block 1b to be expanded is based on one Abutment plate 9 from.

Nach dem Aufweiten des gelochten Blocks 1 b wird der aufgeweitete Block 1 c gemäß Figur 5 mit Hilfe eines Ziehdorns 10 in Richtung des Pfeils PF3 durch eine Ziehmatrize 11 bewegt, wobei der aufgeweitete Block 1 c zu einem Hohlkörper 12 mit Boden 7 abgestreckt wird. After the perforated block 1b has been expanded, the expanded block 1c according to Figure 5 with the aid of a mandrel 10 in the direction of arrow PF3 by a Drawing die 11 moves, with the expanded block 1 c to a hollow body 12 with Bottom 7 is ironed.

Das Abstrecken kann so erfolgen, dass der aufgeweitete Block 1 c nicht komplett durch die Ziehmatrize 11 bewegt wird, so dass dann am freien Ende 13 des Hohlkörpers 12 ein Bund 14 entsteht. Dieser Bund 14 kann zum Anschweißen eines Flansches genutzt werden.The stretching can be done so that the expanded block 1 c is not complete is moved by the drawing die 11, so that then at the free end 13 of the Hollow body 12 a collar 14 is formed. This collar 14 can be used to weld a Flange are used.

Alle Umformvorgänge entsprechend den Darstellungen der Figuren 2 bis 5 werden in ein und derselben Wärme, das heißt der Wärme des gegossenen Blocks 1 durchgeführt.All forming processes in accordance with the representations of Figures 2 to 5 are in one and the same heat, i.e. the heat of the cast block 1 carried out.

Im Anschluss an die Fertigstellung des Hohlkörpers 12 gemäß Figur 5 wird dieser je nach den Anforderungen zu einem Tiegel oder einer Gießwalze weiter bearbeitet. Following the completion of the hollow body 12 according to FIG further processed according to the requirements for a crucible or a casting roller.

BezugszeichenaufstellungREFERENCE NUMBERS

1 -1 -
Blockblock
1a -1a -
gestauchter Blockcompressed block
1b -1b -
gelochter Blockperforated block
1c -1c -
aufgeweiteter Blockexpanded block
2 -2 -
Matrizedie
3 -3 -
Aufnahme f. 2Recording f. 2
4 -4 -
Lochdornpiercer
5 -5 -
Innenwand v. 2Interior wall v. 2
6 -6 -
Oberfläche v. 4Surface v. 4
7 -7 -
Bodenground
8 -8th -
Aufweitdornmandrel
9 -9 -
WiderlagerplatteAbutment plate
10 -10 -
Ziehdornmandrel
11 -11 -
Matrizedie
12 -12 -
Hohlkörperhollow body
13 -13 -
freies Ende v. 12free end of 12
14 -14 -
Bund an 13Confederation on 13
AD -AD -
Außendurchmesser v. 1bOuter diameter of 1b
AD1 -AD1 -
Außendurchmesser v. 1cOuter diameter of 1c
D -D -
Durchmesser v. 1Diameter of 1
D1 -D1 -
Durchmesser v. 1aDiameter of 1a
ID -ID -
Innendurchmesser v. 1bInner diameter of 1b
ID1 -ID1 -
Innendurchmesser v. 1cInner diameter of 1c
L -L -
Länge v. 1Length of 1
L1 -L1 -
Länge v. 1aLength of 1a
PF -PF -
Pfeilarrow
PF1 -PF1 -
Pfeilarrow
PF2 -PF2 -
Pfeilarrow
PF3 -PF3 -
Pfeilarrow

Claims (3)

Verfahren zur Herstellung eines zylindrischen Hohlkörpers (12) aus Kupfer oder einer Kupferlegierung als Halbzeug für einen Tiegel oder eine Gießwalze, bei welchem zunächst ein zylindrischer Block (1) gegossen, dieser Block (1) dann in erwärmten Zustand in Längsrichtung gestaucht, anschließend gelocht und letztlich unter Einsatz eines Dorns (10) zum Hohlkörper (12) umgeformt wird, dadurch gekennzeichnet, dass sowohl das Stauchen als auch das anschließende Lochen unter radialer Abstützung des Blocks (1) durchgeführt werden, wobei am gelochten Block (1b) ein Boden (7) belassen wird, und dass dann der gelochte Block (1b) im Innendurchmesser (ID) und Außendurchmesser (AD) mittels eines Dorns (8) aufgeweitet und letztlich der so aufgeweitete Block (1c) über einen Dorn (10) durch umfangsseitiges Abstrecken zum Hohlkörper (12) umgeformt werden.Process for producing a cylindrical hollow body (12) made of copper or a copper alloy as a semi-finished product for a crucible or a casting roller, in which a cylindrical block (1) is first cast, this block (1) is then compressed in the longitudinal direction in the heated state, then punched and is finally formed into a hollow body (12) using a mandrel (10), characterized in that both upsetting and subsequent punching are carried out with radial support of the block (1), with a base (7) on the perforated block (1b) ) and that the perforated block (1b) in the inside diameter (ID) and outside diameter (AD) is then expanded by means of a mandrel (8) and ultimately the block (1c) thus expanded via a mandrel (10) by circumferential stretching to the hollow body (12) be reshaped. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, dass alle Umformschritte in einer Wärme durchgeführt werden.A method according to claim 1, characterized in that all the forming steps are carried out in one heat. Verfahren nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass beim Abstrecken des aufgeweiteten Blocks (1c) ein Bund (14) am Hohlkörper (12) erzeugt wird.Method according to claim 1 or 2, characterized in that a collar (14) is produced on the hollow body (12) when the expanded block (1c) is stretched out.
EP04007496A 2003-05-14 2004-03-27 Method of manufacturing a hollow body as semi-finished product for a crucible or casting roll Expired - Lifetime EP1477248B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321566 2003-05-14
DE10321566A DE10321566A1 (en) 2003-05-14 2003-05-14 Process for the production of a hollow body as a semi-finished product for a crucible or a casting roll

Publications (3)

Publication Number Publication Date
EP1477248A2 true EP1477248A2 (en) 2004-11-17
EP1477248A3 EP1477248A3 (en) 2005-01-05
EP1477248B1 EP1477248B1 (en) 2006-08-23

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Country Status (6)

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EP (1) EP1477248B1 (en)
AT (1) ATE337116T1 (en)
DE (2) DE10321566A1 (en)
DK (1) DK1477248T3 (en)
ES (1) ES2268522T3 (en)
PT (1) PT1477248E (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134577A1 (en) * 2006-05-22 2007-11-29 Sandvik Mining And Construction Supply Gmbh Transport roller
CN100446889C (en) * 2007-04-12 2008-12-31 林昌绪 Method of processing metal blindgut parts by cold holder
US20150050513A1 (en) * 2011-12-30 2015-02-19 Babasaheb Neelkanth Kalyani Method For Manufacturing Hollow Shafts

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
RU2605875C1 (en) * 2015-07-13 2016-12-27 Виталий Вениаминович Девятов Method of making long-length hollow articles
RU2699425C1 (en) * 2018-07-30 2019-09-05 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") Method of hollow cylindrical billet manufacturing

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134577A1 (en) * 2006-05-22 2007-11-29 Sandvik Mining And Construction Supply Gmbh Transport roller
EA014477B1 (en) * 2006-05-22 2010-12-30 Сандвик Майнинг Энд Констракшн Сапплай Гмбх Transport roller
CN100446889C (en) * 2007-04-12 2008-12-31 林昌绪 Method of processing metal blindgut parts by cold holder
US20150050513A1 (en) * 2011-12-30 2015-02-19 Babasaheb Neelkanth Kalyani Method For Manufacturing Hollow Shafts
US9446445B2 (en) * 2011-12-30 2016-09-20 Bharat Forge Ltd. Method for manufacturing hollow shafts

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EP1477248B1 (en) 2006-08-23
ATE337116T1 (en) 2006-09-15
ES2268522T3 (en) 2007-03-16
EP1477248A3 (en) 2005-01-05
DK1477248T3 (en) 2007-01-02
PT1477248E (en) 2006-12-29
DE502004001238D1 (en) 2006-10-05

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