EP0543092A1 - Procédé de reparation d'une coquille pour la coulée continue de l'acier - Google Patents

Procédé de reparation d'une coquille pour la coulée continue de l'acier Download PDF

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Publication number
EP0543092A1
EP0543092A1 EP92114442A EP92114442A EP0543092A1 EP 0543092 A1 EP0543092 A1 EP 0543092A1 EP 92114442 A EP92114442 A EP 92114442A EP 92114442 A EP92114442 A EP 92114442A EP 0543092 A1 EP0543092 A1 EP 0543092A1
Authority
EP
European Patent Office
Prior art keywords
mold
copper
mould
wear
mandrel
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
EP92114442A
Other languages
German (de)
English (en)
Other versions
EP0543092B1 (fr
Inventor
Egon Evertz
Rolf Prof.Dr.-Ing. Deybold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0543092A1 publication Critical patent/EP0543092A1/fr
Application granted granted Critical
Publication of EP0543092B1 publication Critical patent/EP0543092B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/057—Manufacturing or calibrating the moulds

Definitions

  • the invention relates to a method for working up one-piece copper molds which have become unusable due to wear and tear for the continuous casting of steel, the inner sides being removed mechanically to the depth of wear.
  • One-piece copper molds of this type generally have a rectangular inner cross section, which decreases in the direction of flow, corresponding to the decreasing volume of the steel that is solidifying. Furthermore, they are curved in their longitudinal direction. In this respect, they are considered to be geometrically complicated, which requires a corresponding manufacturing outlay. Therefore, it is usually economical to repair worn molds as far as the state of wear permits. Of course, a repair procedure must also take the geometric conditions into account. It is therefore customary to mechanically process the molds on the inside by removal, the removal having to extend to the depth of the wear. As a result, however, the mold is then thinner than before, so that in the end, falling below the wall thickness required for thermal reasons and reasons of strength limits the possibilities for repair. An ablation process in which the mold taper is reversed is ultimately subject to these restrictions.
  • the object of the invention is to further develop the known method in such a way that the mold can be restored to its original state. So you should not only have the original internal dimensions, but also be unchanged on the outside, so that the strength and the cooling effect are unchanged. If necessary, grooves should also run in the outer wall, which are required for the sealing connection to a coolant system.
  • this object is achieved in that, according to the characterizing part of patent claim 1 A combination of different features is selected, the application of which leads to a repaired mold that matches the original dimensions.
  • the extent of the deformation provided according to the invention is evident from the fact that the mold after the inventive treatment is longer than before. It is therefore finally shortened to its specified length.
  • the extent of the longitudinal section can be concluded from the deformation that has occurred.
  • the copper applied to the outer sides of the mold is generally chosen to be approximately twice the volume as it was removed on the inside in accordance with the internal wear. Precise specifications for this depend on the size of the molds from. It can be determined empirically very easily.
  • the elongation of the mold described above by the treatment according to the invention is not only important as a control measure for the deformation that has occurred, but also has a constructive meaning in the case of molds with groove tracks provided on the outer edge for the connection of cooling devices. These groove tracks would not be maintained by the measures according to the invention which are proposed in detail.
  • the part which extends beyond the stated dimension is cut off after the shaping, whereupon the groove tracks can finally be introduced again in the edge zones in a further process cut.
  • the invention proves itself very well when it is important, on the one hand, to create a mechanically and thermally highly resilient forming structure, and, on the other hand, to be able to restore the groove tracks in the type of forming as a result.
  • the mold 6 shown in FIG. 1 is curved in its longitudinal direction, as shown in particular by the longitudinal axis 7. Accordingly, their internal dimensions 2 are curved on the one hand and on the other hand in the exit direction still conical.
  • a new internal dimension 3 is achieved, which is initially still above the intended value.
  • the mold 6 undergoes an external treatment, which consists in the application of copper.
  • the original external dimension 1 becomes larger due to the treatment, so that the new external dimension 4 results.
  • the mold treated with these values of the internal and external dimensions is treated with an internal mandrel and a drawing nozzle, as taught by the proposal of the invention. Such methods are known as such and do not form the subject of the invention.
  • DE-OS 39 08 977.0 deals with such a reshaping.
  • the increase in length 5, as illustrated in the lower part of FIG. 3, is interesting in the sense of the present invention. This length must be cut off in order to regain the initial shape of the mold. After the mechanical removal of the increase in length, the mold not only assumed the original values in terms of its length, but also in terms of its internal dimension 2 and its external dimension 1.
  • FIG. 4 shows a mold corresponding to FIG. 1 with an upper circumferential groove 10, which serves for the sealing connection to a coolant system.
  • This groove 10 presupposes a length section 9, the extension of which in the longitudinal direction of the mold must be obtained as a longitudinal expansion in the treatment according to the invention, in order to have the initial shape available again after mechanical incorporation of a new groove 10.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP92114442A 1991-08-27 1992-08-25 Procédé de reparation d'une coquille pour la coulée continue de l'acier Expired - Lifetime EP0543092B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128365A DE4128365A1 (de) 1991-08-27 1991-08-27 Verfahren zur aufarbeitung von kupferkokillen fuer das stranggiessen von stahl
DE4128365 1991-08-27

Publications (2)

Publication Number Publication Date
EP0543092A1 true EP0543092A1 (fr) 1993-05-26
EP0543092B1 EP0543092B1 (fr) 1996-06-12

Family

ID=6439202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114442A Expired - Lifetime EP0543092B1 (fr) 1991-08-27 1992-08-25 Procédé de reparation d'une coquille pour la coulée continue de l'acier

Country Status (4)

Country Link
EP (1) EP0543092B1 (fr)
AT (1) ATE139159T1 (fr)
DE (2) DE4128365A1 (fr)
ES (1) ES2090429T3 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012490A1 (de) * 1980-03-31 1981-10-08 Goetze Ag, 5093 Burscheid Vorrichtung zum galvanisieren der mantelflaechen zylindrischer werkstuecke
DE3231444A1 (de) * 1981-09-01 1983-08-11 Mishima Kosan Corp., Kitakyushu, Fukuoka Verfahren zum ausbessern von kokillen fuer den strangguss von stahl
DE3313503A1 (de) * 1983-04-14 1984-10-18 Evertz, Egon, 5650 Solingen Einteilige durchlaufstranggiesskokille und verfahren zu ihrer herstellung
DE3523044A1 (de) * 1984-06-27 1986-01-09 Outokumpu Oy, Helsinki Verfahren und vorrichtung zum herstellen von giessformen
DE3621073A1 (de) * 1985-06-24 1987-02-12 Outokumpu Oy Kokille
DE3908977A1 (de) * 1989-03-18 1990-09-27 Egon Evertz Verfahren und vorrichtung zum ziehen von rohrkoerpern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012490A1 (de) * 1980-03-31 1981-10-08 Goetze Ag, 5093 Burscheid Vorrichtung zum galvanisieren der mantelflaechen zylindrischer werkstuecke
DE3231444A1 (de) * 1981-09-01 1983-08-11 Mishima Kosan Corp., Kitakyushu, Fukuoka Verfahren zum ausbessern von kokillen fuer den strangguss von stahl
DE3313503A1 (de) * 1983-04-14 1984-10-18 Evertz, Egon, 5650 Solingen Einteilige durchlaufstranggiesskokille und verfahren zu ihrer herstellung
DE3523044A1 (de) * 1984-06-27 1986-01-09 Outokumpu Oy, Helsinki Verfahren und vorrichtung zum herstellen von giessformen
DE3621073A1 (de) * 1985-06-24 1987-02-12 Outokumpu Oy Kokille
DE3908977A1 (de) * 1989-03-18 1990-09-27 Egon Evertz Verfahren und vorrichtung zum ziehen von rohrkoerpern

Also Published As

Publication number Publication date
DE59206552D1 (de) 1996-07-18
EP0543092B1 (fr) 1996-06-12
ATE139159T1 (de) 1996-06-15
DE4128365A1 (de) 1993-03-04
ES2090429T3 (es) 1996-10-16

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