EP1575731A1 - Method for the aftertreatment of a through hole of a component - Google Patents

Method for the aftertreatment of a through hole of a component

Info

Publication number
EP1575731A1
EP1575731A1 EP03785557A EP03785557A EP1575731A1 EP 1575731 A1 EP1575731 A1 EP 1575731A1 EP 03785557 A EP03785557 A EP 03785557A EP 03785557 A EP03785557 A EP 03785557A EP 1575731 A1 EP1575731 A1 EP 1575731A1
Authority
EP
European Patent Office
Prior art keywords
hole
component
agent
protected
electrolyte
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.)
Withdrawn
Application number
EP03785557A
Other languages
German (de)
French (fr)
Inventor
Peter Bloch
Rene Jabado
Ursus KRÜGER
Daniel Körtvelyessy
Ralph Reiche
Michael Rindler
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1575731A1 publication Critical patent/EP1575731A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/10—Working turbine blades or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • B23H9/16—Making holes using an electrolytic jet

Definitions

  • the invention relates to a method for reworking a through hole of a component.
  • the through hole prefferably be soiled (oxidized) and restored during the operation of the component.
  • DE 34 03 402 C2 shows a method for the electrochemical machining of an outer surface of workpieces by means of an electrolyte.
  • the processing of areas on the surface where processing is undesirable is prevented by preventing the electrolyte from flowing into these areas by countercurrent of water, using an elaborate holder that is adapted to each component.
  • US Patent 5,702,288 discloses abrasive finishing of through holes.
  • DE 198 32 767 AI describes a method for cleaning a component, wherein the cleaning fluid flows through the through holes and is also present on all other surfaces in the desired manner.
  • the object of the present invention is to improve the reworking of through holes.
  • the object is achieved by a method according to claim 1.
  • FIGS. 1, 2 and 3 each show a device for carrying out a method according to the invention.
  • FIG. 1 shows a device 1.
  • a device 7 is arranged in the device 1, in particular a turbine blade, with at least one through hole 10, in particular a cooling air hole.
  • the component 7 has a cavity, for example.
  • the agent 13 is, for example, an electrolyte 16 and the material is removed electrolytically.
  • the electrode 31 can be designed in many different ways.
  • a plurality of through holes 10 can be machined simultaneously. Accordingly, there are, for example, as many electrodes 31 and / or one or a few plate-shaped electrodes 31 which are arranged in the vicinity of the through holes 10. A corresponding electrode 31 is arranged in the vicinity of the outlet opening 51 of the through hole 10.
  • the component 7 and the electrode 31 are electrically conductively connected to a voltage / current source 25 by lines 32. This will operated accordingly to allow electrochemical ablation (electrolysis).
  • Component 7 represents the other electrode.
  • the current / voltage can be pulsed to improve the process.
  • the current / voltage level, pulse shape, the pauses between the pulses, etc. can be varied in time in order to optimize the process parameters for the material to be removed.
  • the electrolyte 16 is supplied, for example, by an electrolyte supply 19, for example a hose, so that no removal takes place on an inner side 54 of the component 7.
  • a limited removal of material inside the component 7 would also be permissible as long as a wall thickness of the component 7 is not impaired, since primarily only the outer contours of the component 7 should not be influenced.
  • the electrolyte 16 flows, for example, through the inlet opening 48 into the through hole 10 and out through the outlet opening 51. Another direction of flow is also conceivable.
  • the electrolyte 16 is, for example, also connected in an electrically conductive manner by a line 32 to a voltage source 25, so that material in the through hole 10 is removed.
  • the component 7 is arranged, for example, in a medium 22 which does not attack an outer surface 45 of the component 7 and which, like the component 7, is located in a basin 42.
  • the medium 22 is, for example, water or alcohol.
  • Contact of the surface 45 with the means 13, 16, which emerges from the through hole 10, is not prevented, but due to the dilution of the electrolyte 16 by the medium 22, there is little or no reaction of the electrolyte 16 with the surface 51 of the component 7 , Thus, the entire surface 45 is not only protected directly around the through hole 10.
  • the concentration of the electrolyte in the basin 42 is controlled, for example, in such a way that there is no attack by the electrolyte 16 on the surface 45.
  • the thinning takes place by immersing the component 7 in a medium 22 which does not attack the surface 45 of the component 7.
  • a medium 22 which does not attack the surface 45 of the component 7. This is e.g. Water or alcohol.
  • the outer surface 45 can be protected by a mask at least around the through hole 10.
  • Post-processing is also necessary, for example, for an MCrAlY coating of a high-temperature component (gas turbine components, turbine blade), in which MCrAlY undesirably penetrates into the through hole 10 and has to be removed again.
  • a high-temperature component gas turbine components, turbine blade
  • FIG. 3 shows a further device 1 with which the method according to the invention can be carried out.
  • the component 7, at least with its through hole 10, is arranged in a basin 42 such that the through hole 10 is surrounded by the ablation means 13, 16 and 33 in the basin 42.
  • the concentration or activity of the abrasive 13, 16, 33 is so low that the outer surface 45 of the component 7 is not attacked.
  • the component 7 is electrically connected to an electrode 31.
  • the arrangement of the electrode 31 in the vicinity of the through hole 10 only locally, i.e. Electrolytically removed material in the through hole.
  • the electrode 31 is, for example, wedge-shaped and projects somewhat into the through hole 10.
  • the abrasive agent 13, 16, 33 is pumped, for example, by means of a pump (not shown) from the basin 42 through the interior of the component 7 or from the outside through an electrolyte supply 19 through the through hole 10, so that the abrasive agent 13, 16, 33 flows into the through hole 10 from one side 54 or 51 and flows out on the other side 51 or 54 where the electrode 31 is present.
  • FIG. 2 shows an example of a further device 4 with which the method according to the invention can be carried out.
  • An acid 33 (hydrochloric acid, nitric acid or acid mixtures) is used here as the abrasive agent 13, which is preferably selected so that it only attacks the material to be removed, but not the material of the substrate of the component 7, via an acid supply 36 is supplied and flows through the through holes 10 of the ' component 7.
  • a spray nozzle 39 which injects the through hole 10 with a medium 22 which does not cause removal and dilutes the escaping acid 33 so that no chemical attack occurs the surface 45 formed, for example, as a coating on the substrate of the component 7.
  • the spray nozzle 39 is dimensioned accordingly, for example, in order to encapsulate a plurality of outlet openings 51.
  • the component 7 can be arranged in a basin 42 with water in order to achieve dilution (FIG. 1).
  • the acid 33 and the medium 22 are collected, for example, in a collecting basin 44.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

In prior art, through holes often have to be after-treated manually. Disclosed is a method allowing through holes (10) to be after-treated in a chemical or electrochemical manner with the aid of a material-removing agent (13, 16, 33), the outer surface (45) located around a discharge port (51) of the through hole (10) being protected accordingly from being attacked by the agent (13, 16, 33) that is to be removed.

Description

Verfahren zur Nachbearbeitung eines Durchgangslochs eines Process for finishing a through hole of a
Bauteilscomponent
Die Erfindung betrifft ein Verfahren zur Nachbearbeitung eines Durchgangslochs eines Bauteils.The invention relates to a method for reworking a through hole of a component.
Bei der Herstellung von Durchgangslöchern eines Bauteils wird oft nicht die gewünschte Geometrie des Durchgangslochs er- reicht, so dass eine Nachbearbeitung erforderlich ist.When producing through holes of a component, the desired geometry of the through hole is often not achieved, so that post-processing is necessary.
Dies kann auch der Fall sein, wenn bei einem Folgeprozess während der Herstellung des Bauteils, das bereits Durchgangslöcher aufweist, diese verschmutzt werden, beispielsweise dadurch, dass aufgrund einer äußeren Beschichtung des Bauteils auch eine Beschichtung in dem Durchgangsloch in unerwünschter Weise erfolgt.This can also be the case if, during a follow-up process during the production of the component which already has through holes, the latter are soiled, for example because an external coating of the component also causes an undesirable coating in the through hole.
Ebenso ist es möglich, dass während des Betriebs des Bauteils das Durchgangsloch verschmutzt (oxidiert) und wiederhergestellt werden soll.It is also possible for the through hole to be soiled (oxidized) and restored during the operation of the component.
Die DE 34 03 402 C2 zeigt ein Verfahren zur elektrochemischen Bearbeitung einer äußeren Oberfläche von Werkstücken mittels eines Elektrolyts. Die Bearbeitung von Bereichen an der Oberfläche, an denen eine Bearbeitung unerwünscht ist, wird ver- hindert, indem durch Gegenstrom von Wasser ein Zufluss des Elektrolyts in diese Bereiche verhindert wird, wobei dazu eine aufwändige Halterung verwendet wird, die jedem Bauteil angepasst werden uss.DE 34 03 402 C2 shows a method for the electrochemical machining of an outer surface of workpieces by means of an electrolyte. The processing of areas on the surface where processing is undesirable is prevented by preventing the electrolyte from flowing into these areas by countercurrent of water, using an elaborate holder that is adapted to each component.
Die US-PS 5,702,288 offenbart ein abrasives Nachbearbeiten von Durchgangslöchern.US Patent 5,702,288 discloses abrasive finishing of through holes.
Die DE 198 32 767 AI beschreibt ein Verfahren zum Reinigen eines Bauteils, wobei die Reinigungsflüssigkeit durch die Durchgangslöcher strömt und auch an allen anderen Oberflächen in gewünschter Weise vorhanden ist. Aufgabe der vorliegenden Erfindung ist es, die Nachbearbeitung von Durchgangslöchern zu verbessern.DE 198 32 767 AI describes a method for cleaning a component, wherein the cleaning fluid flows through the through holes and is also present on all other surfaces in the desired manner. The object of the present invention is to improve the reworking of through holes.
Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1.The object is achieved by a method according to claim 1.
In den Unteransprüchen sind weitere vorteilhafte Verfahrensschritte aufgelistet.Further advantageous method steps are listed in the subclaims.
Diese Verfahrensschritte können beliebig miteinander in vorteilhafter Art und Weise kombiniert werden.These method steps can be combined with one another in an advantageous manner.
Es zeigen Figur 1, 2 und 3 jeweils eine Vorrichtung um ein erfindungsgemäßes Verfahren durchzuführen.FIGS. 1, 2 and 3 each show a device for carrying out a method according to the invention.
Figur 1 zeigt eine Vorrichtung 1.FIG. 1 shows a device 1.
In der Vorrichtung 1 ist ein Bauteil 7 angeordnet, insbesondere eine Turbinenschaufel, mit zumindest einem Durchgangsloch 10, insbesondere ein Kühlluftloch. Das Bauteil 7 weist beispielsweise einen Hohlraum auf.A device 7 is arranged in the device 1, in particular a turbine blade, with at least one through hole 10, in particular a cooling air hole. The component 7 has a cavity, for example.
Durch das Durchgangsloch 10 wird erfindungsgemäß ein Mittel 13 hindurchgeleitet, das Material des Bauteils 7 in dem Durchgangsloch 10 abträgt. Das Mittel 13 ist beispielsweise ein Elektrolyt 16 und die Abtragung von Material erfolgt elektrolytisch. Die Elektrode 31 kann vielfältig ausgestaltet sein.A means 13, which removes material of the component 7 in the through hole 10, is passed through the through hole 10 according to the invention. The agent 13 is, for example, an electrolyte 16 and the material is removed electrolytically. The electrode 31 can be designed in many different ways.
Sie ist beispielsweise auf eine jeweilige Ausgangsöffnung 51 des Durchgangslochs 10 angepasst. Mit dem Verfahren können beispielsweise gleichzeitig mehrere Durchgangslöcher 10 bearbeitet werden. Dementsprechend gibt es beispielsweise ebenso viele Elektroden 31 und/oder eine oder ein paar plattenförmige Elektroden 31, die in der Nähe der Durchgangslöcher 10 angeordnet sind. In der Nähe der Ausgangsöffnung 51 des Durchgangslochs 10 ist eine entsprechende Elektrode 31 angeordnet. Das Bauteil 7 und die Elektrode 31 sind durch Leitungen 32 elektrisch leitend mit einer Spannungs- / Stromquelle 25 verbunden. Diese wird entsprechend betrieben, um eine elektrochemische Abtragung zu ermöglichen (Elektrolyse) . Das Bauteil 7 stellt die andere Elektrode dar.For example, it is adapted to a respective exit opening 51 of the through hole 10. With the method, for example, a plurality of through holes 10 can be machined simultaneously. Accordingly, there are, for example, as many electrodes 31 and / or one or a few plate-shaped electrodes 31 which are arranged in the vicinity of the through holes 10. A corresponding electrode 31 is arranged in the vicinity of the outlet opening 51 of the through hole 10. The component 7 and the electrode 31 are electrically conductively connected to a voltage / current source 25 by lines 32. This will operated accordingly to allow electrochemical ablation (electrolysis). Component 7 represents the other electrode.
Der Strom/die Spannung kann gepulst werden, um das Verfahren zu verbessern. Dabei können Strom/Spannungshöhe, Pulsform, die Pausen zwischen den Pulsen usw. zeitlich beliebig variiert werden, um eine Optimierung der Verfahrensparameter an das abzutragende Material zu erreichen.The current / voltage can be pulsed to improve the process. The current / voltage level, pulse shape, the pauses between the pulses, etc. can be varied in time in order to optimize the process parameters for the material to be removed.
Die Zufuhr des Elektrolyten 16 erfolgt beispielsweise durch eine Elektrolytzufuhr 19, beispielsweise ein Schlauch, so dass auf einer Innenseite 54 des Bauteils 7 keine Abtragung erfolgt. Ein begrenzter Abtrag von Material im Innern des Bauteils 7 wäre auch zulässig, solange eine Wanddicke des Bauteils 7 nicht beeinträchtigt wird, da in erster Linie nur die äußeren Konturen des Bauteils 7 nicht beeinflusst werden sollen. Der Elektrolyt 16 strömt beispielsweise durch die Eingangs- Öffnung 48 in das Durchgangsloch 10 und durch die Ausgangsöffnung 51 wieder heraus. Eine andere Strömungsrichtung ist ebenfalls denkbar.The electrolyte 16 is supplied, for example, by an electrolyte supply 19, for example a hose, so that no removal takes place on an inner side 54 of the component 7. A limited removal of material inside the component 7 would also be permissible as long as a wall thickness of the component 7 is not impaired, since primarily only the outer contours of the component 7 should not be influenced. The electrolyte 16 flows, for example, through the inlet opening 48 into the through hole 10 and out through the outlet opening 51. Another direction of flow is also conceivable.
Der Elektrolyt 16 ist beispielsweise auch elektrisch leitend durch eine Leitung 32 mit einer Spannungsquelle 25 verbunden, so dass Material in dem Durchgangsloch 10 abgetragen wird.The electrolyte 16 is, for example, also connected in an electrically conductive manner by a line 32 to a voltage source 25, so that material in the through hole 10 is removed.
Das Bauteil 7 ist beispielsweise in einem Medium 22 angeordnet, das eine äußere Oberfläche 45 des Bauteils 7 nicht angreift und das sich wie das Bauteil 7 in einem Becken 42 be- findet. Das Medium 22 ist beispielsweise Wasser oder Alkohol. Ein Kontakt der Oberfläche 45 mit dem Mittel 13, 16, das aus dem Durchgangsloch 10 austritt, wird nicht verhindert, aber durch die Verdünnung des Elektrolyts 16 durch das Medium 22 findet kaum oder keine Reaktion des Elektrolyten 16 mit der Oberfläche 51 des Bauteils 7 statt. So wird die gesamte Oberfläche 45 also nicht nur unmittelbar um das Durchgangsloch 10 herum geschützt. Die Konzentration des Elektrolyts im Becken 42 wird beispielsweise so kontrolliert, dass es zu keinem Angriff des Elektrolyts 16 auf der Oberfläche 45 kommt.The component 7 is arranged, for example, in a medium 22 which does not attack an outer surface 45 of the component 7 and which, like the component 7, is located in a basin 42. The medium 22 is, for example, water or alcohol. Contact of the surface 45 with the means 13, 16, which emerges from the through hole 10, is not prevented, but due to the dilution of the electrolyte 16 by the medium 22, there is little or no reaction of the electrolyte 16 with the surface 51 of the component 7 , Thus, the entire surface 45 is not only protected directly around the through hole 10. The concentration of the electrolyte in the basin 42 is controlled, for example, in such a way that there is no attack by the electrolyte 16 on the surface 45.
Die Verdünnung erfolgt durch Eintauchen des Bauteils 7 in ein Medium 22, das die Oberfläche 45 des Bauteils 7 nicht angreift. Dies ist z.B. Wasser oder Alkohol.The thinning takes place by immersing the component 7 in a medium 22 which does not attack the surface 45 of the component 7. This is e.g. Water or alcohol.
Weitere Möglichkeiten zur Verdünnung des abtragenden Mittels 13, 16 sind denkbar.Further possibilities for diluting the abrasive 13, 16 are conceivable.
Ebenso kann die äußere Oberfläche 45 durch eine Maskierung zumindest um das Durchgangsloch 10 geschützt sein.Likewise, the outer surface 45 can be protected by a mask at least around the through hole 10.
Eine Nachbearbeitung ist beispielsweise auch notwendig bei einer MCrAlY-Beschichtung eines Hochtemperaturbauteils (Gasturbinenbauteile, Turbinenschaufel) , bei der MCrAlY in das Durchgangsloch 10 in unerwünschter Weise eindringt und wieder entfernt werden muss.Post-processing is also necessary, for example, for an MCrAlY coating of a high-temperature component (gas turbine components, turbine blade), in which MCrAlY undesirably penetrates into the through hole 10 and has to be removed again.
Figur 3 zeigt eine weitere Vorrichtung 1, mit der das erfindungsgemäße Verfahren durchgeführt werden kann.FIG. 3 shows a further device 1 with which the method according to the invention can be carried out.
Hier ist das Bauteil 7 zumindest mit seinem Durchgangsloch 10 in einem Becken 42 so angeordnet, dass das Durchgangsloch 10 von dem Abtragungsmittel 13, 16 und 33 in dem Becken 42 umgeben ist. Die. Konzentration oder Aktivität des abtragenden Mittels 13, 16, 33 ist jedoch so gering, dass die äußere Oberfläche 45 des Bauteils 7 nicht angegriffen wird.Here, the component 7, at least with its through hole 10, is arranged in a basin 42 such that the through hole 10 is surrounded by the ablation means 13, 16 and 33 in the basin 42. The. However, the concentration or activity of the abrasive 13, 16, 33 is so low that the outer surface 45 of the component 7 is not attacked.
Das Bauteil 7 ist mit einer Elektrode 31 elektrisch verbunden. Durch die Anordnung der Elektrode 31 in der Nähe des Durchgangslochs 10 wird nur lokal, d.h. im Durchgangsloch elektrolytisch Material entfernt. Die elektrolytischeThe component 7 is electrically connected to an electrode 31. The arrangement of the electrode 31 in the vicinity of the through hole 10 only locally, i.e. Electrolytically removed material in the through hole. The electrolytic
Entfernung geschieht erst durch Anlegen einer Spannung oder eines Stroms. Dabei ist die Elektrode 31 beispielsweise keilförmig ausgebildet und ragt etwas in das Durchgangsloch 10 hinein.Removal only happens when a voltage or current is applied. The electrode 31 is, for example, wedge-shaped and projects somewhat into the through hole 10.
Das abtragende Mittel 13, 16, 33 wird beispielsweise mittels einer Pumpe (nicht dargestellt) aus dem Becken 42 durch das Innere des Bauteils 7 oder von aussen durch eine Elektrolytzufuhr 19 durch das Durchgangsloch 10 gepumpt, so dass das abtragende Mittel 13, 16, 33 von einer Seite 54 oder 51 in das Durchgangsloch 10 strömt und auf der anderen Seite 51 oder 54 ausströmt, wo die Elektrode 31 vorhanden ist.The abrasive agent 13, 16, 33 is pumped, for example, by means of a pump (not shown) from the basin 42 through the interior of the component 7 or from the outside through an electrolyte supply 19 through the through hole 10, so that the abrasive agent 13, 16, 33 flows into the through hole 10 from one side 54 or 51 and flows out on the other side 51 or 54 where the electrode 31 is present.
Die Figur 2 zeigt beispielhaft eine weitere Vorrichtung 4 mit der das erfindungsgemäße Verfahren durchgeführt werden kann.FIG. 2 shows an example of a further device 4 with which the method according to the invention can be carried out.
Als abtragendes Mittel 13, das vorzugsweise so gewählt wird, dass es nur das zu entfernende Material, nicht aber das Materials des Substrats des Bauteils 7 angreift, wird hier eine Säure 33 (Salzsäure, Salpetersäure oder Säuregemische) ver- wendet, die über eine Säurezufuhr 36 zugeführt wird und durch die Durchgangslöcher 10 des' Bauteils 7 strömt. Auf der Außenseite 45 des Bauteils 7 in der Nähe der Ausgangsöffnung 51 ist beispielsweise eine Spritzdüse 39 vorhanden, die das Durchgangsloch 10 mit einem Medium 22, das keinen Abtrag ver- ursacht, umspritzt, und die austretende Säure 33 verdünnt, so dass kein chemischer Angriff der z.B. als Beschichtung auf dem Substrat des Bauteils 7 ausgebildeten Oberfläche 45 erfolgt. So wird die Oberfläche 45 zumindest um das Durchgangsloch 10 geschützt. Die Spritzdüse 39 ist beispielsweise entsprechend dimensioniert, um mehrere Ausgangsöffnungen 51 zu umspritzen. Ebenso kann das Bauteil 7 in einem Becken 42 mit Wasser angeordnet sein, um eine Verdünnung zu erreichen (Fig. 1) .An acid 33 (hydrochloric acid, nitric acid or acid mixtures) is used here as the abrasive agent 13, which is preferably selected so that it only attacks the material to be removed, but not the material of the substrate of the component 7, via an acid supply 36 is supplied and flows through the through holes 10 of the ' component 7. On the outside 45 of the component 7 in the vicinity of the outlet opening 51 there is, for example, a spray nozzle 39 which injects the through hole 10 with a medium 22 which does not cause removal and dilutes the escaping acid 33 so that no chemical attack occurs the surface 45 formed, for example, as a coating on the substrate of the component 7. Thus, the surface 45 is protected at least around the through hole 10. The spray nozzle 39 is dimensioned accordingly, for example, in order to encapsulate a plurality of outlet openings 51. Likewise, the component 7 can be arranged in a basin 42 with water in order to achieve dilution (FIG. 1).
In Figur 2 wird die Säure 33 und das Medium 22 beispielsweise in einem Auffangbecken 44 aufgefangen. In FIG. 2, the acid 33 and the medium 22 are collected, for example, in a collecting basin 44.

Claims

Patentansprüche claims
1. Verfahren zur Nachbearbeitung eines Durchgangslochs (10) eines Bauteils (7), bei dem ein Material abtragendes Mittel (13) durch das Durchgangsloch (10) strömt, und bei dem eine um das Durchgangsloch (10) des Bauteils (7) angeordnete Oberfläche (45) geschützt wird.1. A method for reworking a through hole (10) of a component (7), in which a material-removing agent (13) flows through the through hole (10), and in which a surface arranged around the through hole (10) of the component (7) (45) is protected.
2. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass2. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
die Oberfläche (45) dadurch geschützt wird, dass das Mittel (13) nach dem Austritt aus dem Durchgangsloch (10) verdünnt wird, so dass kein Abtrag an der Oberfläche (45) erfolgt.the surface (45) is protected by diluting the agent (13) after it emerges from the through hole (10), so that there is no abrasion on the surface (45).
3. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass3. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
die Oberfläche (45) dadurch geschützt wird, dass eine Elektrode (31) so in der Nähe des Durchgangslochs (10) angeordnet ist, dass nur im Bereich in der Nähe des Durchgangslochs (101 Material abgetragen wird.the surface (45) is protected in that an electrode (31) is arranged in the vicinity of the through hole (10) in such a way that material is removed only in the area near the through hole (101).
4. Verfahren nach Anspruch 1, 2 oder 3, d a d u r c h g e k e n n z e i c h n e t, dass4. The method according to claim 1, 2 or 3, d a d u r c h g e k e n n z e i c h n e t that
das Material abtragende Mittel (13) von innen (54) nach außen (51) durch das Durchgangsloch (10) strömt. the material-removing means (13) flows from the inside (54) to the outside (51) through the through hole (10).
. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass, The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
als Mittel (13) eine Säure (33) verwendet wird.an acid (33) is used as agent (13).
6. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass6. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
als Mittel (13) ein Elektrolyt (16) verwendet wird.an electrolyte (16) is used as the means (13).
7. Verfahren nach Anspruch 1, 3 oder 6, d a d u r c h g e k e n n z e i c h n e t, dass7. The method of claim 1, 3 or 6, d a d u r c h g e k e n n z e i c h n e t that
die Nachbearbeitung elektrolytisch erfolgt.the finishing is done electrolytically.
8. Verfahren nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, dass8. The method of claim 2, d a d u r c h g e k e n n z e i c h n e t that
die Verdünnung des Mittels (13) durch Einbringung des Bauteils (7) mit dem zu bearbeitenden Durchgangsloch (10) in ein nicht abtragendes Medium (22) erfolgt.the agent (13) is diluted by introducing the component (7) with the through hole (10) to be machined into a non-abrasive medium (22).
9. Verfahren nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, dass9. The method of claim 2, d a d u r c h g e k e n n z e i c h n e t that
die Verdünnung des Mittels (13, 16, 33) durch Umspritzen des austretenden Mittels (13, 16, 33) mit einem nicht abtragenden Medium (22) erfolgt. the agent (13, 16, 33) is thinned by overmolding the emerging agent (13, 16, 33) with a non-abrasive medium (22).
10.Verfahren nach Anspruch 8 oder 9, d a d u r c h g e k e n n z e i c h n e t, dass10.A method according to claim 8 or 9, d a d u r c h g e k e n n z e i c h n e t that
als nicht abtragendes Medium (22) Wasser verwendet wird.water is used as the non-abrasive medium (22).
11.Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass11. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
das Durchgangsloch (10) zumindest partiell eine Schicht aufweist, die abgetragen werden soll.the through hole (10) at least partially has a layer that is to be removed.
12.Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass12.The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that
die Oberfläche (45) durch eine Maskierung geschützt wird.the surface (45) is protected by a mask.
13.Verfahren nach Anspruch 6 oder 7, d a d u r c h g e k e n n z e i c h n e t,13.The method according to claim 6 or 7, d a d u r c h g e k e n n z e i c h n e t,
dass ein Strom/Spannung verwendet wird, um die Nachbearbeitung elektrolytisch durchzuführen, und dass der Strom/Spannung gepulst ist. that a current / voltage is used to carry out the post-processing electrolytically and that the current / voltage is pulsed.
EP03785557A 2002-12-18 2003-12-11 Method for the aftertreatment of a through hole of a component Withdrawn EP1575731A1 (en)

Applications Claiming Priority (3)

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DE10259366 2002-12-18
DE10259366A DE10259366A1 (en) 2002-12-18 2002-12-18 Method for finishing a through hole of a component
PCT/DE2003/004095 WO2004054748A1 (en) 2002-12-18 2003-12-11 Method for the aftertreatment of a through hole of a component

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EP1575731A1 true EP1575731A1 (en) 2005-09-21

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US (1) US20060283717A1 (en)
EP (1) EP1575731A1 (en)
CN (1) CN1729075A (en)
DE (1) DE10259366A1 (en)
WO (1) WO2004054748A1 (en)

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DE10259366A1 (en) 2004-07-08
CN1729075A (en) 2006-02-01
WO2004054748A1 (en) 2004-07-01
US20060283717A1 (en) 2006-12-21

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