EP1901894A1 - Nozzle and method for treating an interior of a workpiece - Google Patents

Nozzle and method for treating an interior of a workpiece

Info

Publication number
EP1901894A1
EP1901894A1 EP06754897A EP06754897A EP1901894A1 EP 1901894 A1 EP1901894 A1 EP 1901894A1 EP 06754897 A EP06754897 A EP 06754897A EP 06754897 A EP06754897 A EP 06754897A EP 1901894 A1 EP1901894 A1 EP 1901894A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
edge
fluid medium
channel
angle
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
EP06754897A
Other languages
German (de)
French (fr)
Other versions
EP1901894B1 (en
Inventor
Alwin Göring
Michael Jarchau
Dominic Krautwurst
Walter Burger
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.)
Hammelmann Maschinenfabrik GmbH
Original Assignee
Robert Bosch GmbH
Paul Hammelmann Maschinenfabrik GmbH
Hammelmann Maschinenfabrik GmbH
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 Robert Bosch GmbH, Paul Hammelmann Maschinenfabrik GmbH, Hammelmann Maschinenfabrik GmbH filed Critical Robert Bosch GmbH
Publication of EP1901894A1 publication Critical patent/EP1901894A1/en
Application granted granted Critical
Publication of EP1901894B1 publication Critical patent/EP1901894B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/083—Deburring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes

Definitions

  • the present invention relates to a nozzle according to the preamble of claim 1 and a method for processing an interior of a workpiece.
  • the demand for miniaturization, increase in power density and weight saving changes the structural design of many workpieces, especially of machine components and the methods for their production.
  • holes and flow channels in series components for injection systems of engines are becoming smaller and smaller and the materials used become increasingly stronger due to the high demands.
  • burrs are always created at intersections of drill holes and at heels, which are not accessible to mechanical deburring tools. Chips, small particles and dirt residues remain in the workpiece and can not or only insufficiently be removed with conventional methods. At the same time, however, the requirements for cleanliness and a defined surface quality are increasing in order to be able to guarantee the reliability of the components during operation over the entire product life cycle.
  • liquid jets are generated by means of nozzles which are located outside the workpiece, which radiate into the holes and openings.
  • the fluid medium emerging from nozzle channels under high pressure preferably water or emulsions, is intended to dissolve dirt and burrs on the inner surface of the bores and openings due to the high kinetic energy of the medium.
  • abrasive particles such as.
  • corundum used in conjunction with the medium, wherein an effective high speed of the exiting liquid jet is achieved by a previous high-pressure relief.
  • these particles are deflected by impact pieces, so that they meet the surface to be treated area and take effect there.
  • damping effects due to water pads hinder the machining process as well as the fact that critical zones can not be directly illuminated. For example, only flutter and flicker burrs in larger holes can be safely removed. The removal of root burrs is practically impossible due to the poor energy conversion.
  • the known possibilities of machining an interior of a workpiece do not meet the requirements for mass production.
  • the invention is therefore based on the object, so to develop a nozzle and a method of the generic type that the requirements of expectant processing is possible, while improving the service life of the nozzle.
  • the new method succeeds in optimally bringing the kinetic energy into the area where it effectively changes the surface in the desired way.
  • This can be a targeted roughening, for example, to prepare for a coating, a removal of strongly adhering dirt or coating or the removal of a firm and circumferentially connected to a deburring root ridge. Since this, as mentioned, so far meaningful way is not possible, the invention has a great importance in the manufacturing process of injection components for the automotive industry.
  • the bottom of the feed hole is partially raised, whereby the transition region narrows to the nozzle channel.
  • the medium Due to the cross-sectional constriction, the medium is guided so that cavitation within the nozzle channel and erosion wear at the outlet of the nozzle channel is largely avoided. This ensures that the emerging liquid jet stably maintains its shape and direction. As has surprisingly been found, the service life of such a nozzle is significantly increased, thus representing a remarkable advance over the prior art.
  • the raised formation of the bottom of the supply hole can be formed manifold. Conveniently, the survey is centric.
  • Figures 1 and 2 each a nozzle according to the invention in different processing traps, in a sectional side view
  • Figures 5 and 6 a mounted nozzle, each in a longitudinal section
  • the nozzle 3 shown in the exemplary embodiments has two nozzle channels 4 located opposite one another, out of which emerges a fluid medium which passes through a central feed bore 5 and is under high pressure.
  • the bottom of the feed bore 5 has an elevation, which is provided in the example shown in Figures 1 and 2 by the reference numeral 6.
  • This elevation 6, which is embodied spherically in the exemplary embodiment shown in FIG. 3, bell-shaped 21, conical 22, frusto-conical 23 and cylindrical 24, narrows the transition region to the nozzle channels 4.
  • the interior 1 opens into the interior 2, wherein in the production in the region of the common edge 10, 11 a radiatorgrat forms, which is eliminated by the exiting the nozzle channels 4 liquid jet.
  • the liquid medium usually water or an emulsion
  • the liquid medium under a pressure of 400 to 4000 bar, preferably 1500 to 2500 bar.
  • a relaxation of the pressure takes place in the nozzle channels 4 while converting the potential into kinetic energy.
  • the liquid jet hits the edges 10, 11 or the existing ones at high speed
  • FIG. 2 shows the use of the nozzle for surface treatment of the inner chamber 1.
  • the arrangement or extent of the nozzle channels 4 corresponds to that shown in FIG.
  • FIG. 4 shows the transition from the smaller inner space 1 in cross-section into the larger inner space 2.
  • Optimum results in terms of quality and processing time in machining the root deburring edge 11 are achieved when the liquid jet leaves the nozzle channels 4 at an angle ⁇ equal to one half angle ⁇ (reference 18). If the edge 11 changes over the length, then the optimum angle ⁇ should correspond to the arithmetic mean of the maximum and minimum edge angle ⁇ 18.
  • the nozzle 3 is designed as a lance nozzle which, on its side facing away from the nozzle channels 4, has a cuff 25 which rests in a bearing opening 17 of a nozzle holder 15.
  • the cuff 25 lies with its underside on a seal 16 which is positioned at the bottom of the bearing opening 17.
  • the nozzle 3 is thus not biased by an externally applied biasing force, which could be unfavorable for the alignment of the nozzle 3 and thus for the accuracy of the process. Since the nozzle 3 against the inflow direction 14 is axially movable, there is a collision protection for the nozzle 3 in the unpressurized state, should the nozzle encounter an obstacle when retracted or be positioned incorrectly.
  • the nozzle 3 can be rotated by a rotary drive and operated at speeds in the range of 50 to 3000 min "1 , preferably 200 to 1500 min " 1 , depending on the task and the material to be processed.
  • the nozzle 3 can perform a pivoting movement about the longitudinal axis and / or oscillating stroke movement.
  • the nozzle 3 is introduced for deburring in the respective smaller inner space 1, the smallest diameter in the range of 1 to 30 mm, preferably in the range of 2 to 10 mm lies.

Abstract

A nozzle for treating an interior of a workpiece by means of a highly pressurized fluid medium flowing out of at least one nozzle channel. The nozzle channel branches off from a supply borehole provided in the form of a blind hole. The nozzle is designed in such a manner that the nozzle channel, starting from the bottom end area of the supply borehole, extends at an angle less than or equal to 90° to the supply bore hole in the inflowing direction, the bottom of the supply borehole being provided with an elevation whereby narrowing the transition area to the nozzle channel.

Description

Düse und Verfahren zur Bearbeitung eines Innenraumes eines Werkstücks Nozzle and method for processing an interior of a workpiece
Die vorliegende Erfindung betrifft eine Düse entsprechend dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Bearbeitung eines Innenraumes eines Werk- Stücks.The present invention relates to a nozzle according to the preamble of claim 1 and a method for processing an interior of a workpiece.
Die Forderung nach einer Miniaturisierung, Erhöhung der Leistungsdichte und Gewichtseinsparung verändert die konstruktive Gestaltung vieler Werkstücke, insbesondere von Maschinenbauteilen sowie die Methoden zu deren Fertigung.The demand for miniaturization, increase in power density and weight saving changes the structural design of many workpieces, especially of machine components and the methods for their production.
So werden beispielsweise Bohrungen und Strömungskanäle in Serienkomponenten für Einspritzsysteme von Motoren immer kleiner und die verwendeten Werkstoffe aufgrund der hohen Anforderungen immer fester.For example, holes and flow channels in series components for injection systems of engines are becoming smaller and smaller and the materials used become increasingly stronger due to the high demands.
Bei einer spanenden Fertigung solcher Teile entstehen in jedem Fall Grate an Verschneidungen von Bohrungen und an Absätzen, die für mechanische Entgratwerkzeuge nicht zugänglich sind. Späne, kleine Partikel und Schmutzreste verbleiben im Werkstück und sind mit herkömmlichen Methoden nicht oder nur unzureichend zu entfernen. Gleichzeitig steigen jedoch die Anforderungen an die Sauberkeit und an eine definierte Oberflächenqualität, um die Zuverlässigkeit der Bauteile im Betrieb über den gesamten Produktlebenszyklus gewährleisten zu können.In the case of a machining production of such parts, burrs are always created at intersections of drill holes and at heels, which are not accessible to mechanical deburring tools. Chips, small particles and dirt residues remain in the workpiece and can not or only insufficiently be removed with conventional methods. At the same time, however, the requirements for cleanliness and a defined surface quality are increasing in order to be able to guarantee the reliability of the components during operation over the entire product life cycle.
Aus dem Stand der Technik sind Verfahren zum Reinigen und Entgraten bekannt, bei denen mit Hilfe von Düsen, die sich außerhalb des Werkstücks befinden, Flüs- sigkeitsstrahlen erzeugt werden, die in die Bohrungen und Öffnungen hineinstrahlen. Das unter hohem Druck aus Düsenkanälen austretende fluide Medium, vorzugsweise Wasser oder Emulsionen, soll aufgrund der hohen kinetischen Energie des Mediums Schmutz und Grate an der inneren Oberfläche der Bohrungen und Öffnungen lösen. Bei einem anderen Verfahren kommen abrasiv wirkende Partikel, wie z. B. Korund, in Verbindung mit dem Medium zum Einsatz, wobei eine wirksame hohe Geschwindigkeit des austretenden Flüssigkeitsstrahls durch eine vorausgegangene Hochdruckentspannung erreicht wird.Methods for cleaning and deburring are known in the prior art, in which liquid jets are generated by means of nozzles which are located outside the workpiece, which radiate into the holes and openings. The fluid medium emerging from nozzle channels under high pressure, preferably water or emulsions, is intended to dissolve dirt and burrs on the inner surface of the bores and openings due to the high kinetic energy of the medium. In another method come abrasive particles, such as. As corundum, used in conjunction with the medium, wherein an effective high speed of the exiting liquid jet is achieved by a previous high-pressure relief.
Im Werkstück werden diese Teilchen durch Prallstücke umgelenkt, so dass sie auf den zu behandelnden Oberflächenbereich treffen und dort wirksam werden.In the workpiece, these particles are deflected by impact pieces, so that they meet the surface to be treated area and take effect there.
Die bekannten Verfahren weisen allesamt gravierende Nachteile auf, die den geforderten Ansprüchen an die Qualität der Bearbeitung nicht im gewünschten Umfang gerecht werden.The known methods all have serious disadvantages that do not meet the required demands on the quality of the processing to the desired extent.
Darüber hinaus ist die Wirkung der außerhalb des Werkstückes zum Einsatz kom- menden Düsen unbefriedigend, da zum einen eine schlechte Energieumsetzung durch den großen Abstand zwischen der Düse und der zu bearbeitenden Oberfläche und zum anderen eine Störung der Hochdruckstrahlen durch die abfließende Flüssigkeit gegeben ist.In addition, the effect of the nozzles used outside of the workpiece is unsatisfactory since, on the one hand, there is poor energy conversion due to the large distance between the nozzle and the surface to be machined and, on the other hand, disruption of the high-pressure jets by the outflowing liquid.
Weiter behindern Dämpfungseffekte durch Wasserpolster den Bearbeitungsprozess ebenso wie die Tatsache, dass kritische Zonen nicht direkt angestrahlt werden können. So können beispielsweise nur Flatter- und Flimmergrate in größeren Bohrungen sicher entfernt werden. Die Entfernung von Wurzelgraten ist aufgrund der schlechten Energieumsetzung praktisch gar nicht möglich.Furthermore, damping effects due to water pads hinder the machining process as well as the fact that critical zones can not be directly illuminated. For example, only flutter and flicker burrs in larger holes can be safely removed. The removal of root burrs is practically impossible due to the poor energy conversion.
Der genannte Einsatz von abrasiv wirkenden Partikeln führt zu einem Verschleiß der einzusetzenden Prallstücke, deren Handhabung überdies relativ kompliziert ist und einer rationellen Fertigung entgegensteht.The said use of abrasive particles leads to wear of the impact pieces to be used, whose handling is also relatively complicated and precludes efficient production.
Darüber hinaus kommt es durch die Abrasivteilchen häufig zu Verschmutzungen und Verstopfungen, so dass sich insgesamt hohe Betriebskosten ergeben.In addition, it often comes through the Abrasivteilchen soiling and clogging, so that overall high operating costs.
Die bekannten Möglichkeiten der Bearbeitung eines Innenraumes eines Werkstückes werden den Anforderungen an eine Serienfertigung nicht gerecht. Der Erfindung liegt daher die Aufgabe zugrunde, eine Düse und ein Verfahren der gattungsgemäßen Art so weiter zu entwickeln, dass eine den Anforderungen gerecht werdende Bearbeitung möglich ist, bei gleichzeitig verbesserter Standzeit der Düse.The known possibilities of machining an interior of a workpiece do not meet the requirements for mass production. The invention is therefore based on the object, so to develop a nozzle and a method of the generic type that the requirements of expectant processing is possible, while improving the service life of the nozzle.
Diese Aufgabe wird durch eine Düse mit den Merkmalen des Anspruchs 1 sowie ein Verfahren mit den Merkmalen des Anspruchs 10 gelöst.This object is achieved by a nozzle having the features of claim 1 and a method having the features of claim 10.
In Kombination mit der neuen Düse gelingt es durch das neue Verfahren, die kinetische Energie optimal in den Bereich zu bringen, wo sie wirksam die Oberfläche in der gewünschten Weise verändert.In combination with the new nozzle, the new method succeeds in optimally bringing the kinetic energy into the area where it effectively changes the surface in the desired way.
Dies kann eine gezielte Aufrauung, beispielsweise zur Vorbereitung für eine Be- Schichtung sein, eine Beseitigung von stark anhaftendem Schmutz oder Belag oder die Entfernung eines fest und umlaufend mit einer Entgratkontur verbundenen Wurzelgrates. Da dies, wie erwähnt, bislang sinnvoller Weise nicht möglich ist, hat die Erfindung eine große Bedeutung im Fertigungsprozess von Einspritzkomponenten für die Automobilindustrie.This can be a targeted roughening, for example, to prepare for a coating, a removal of strongly adhering dirt or coating or the removal of a firm and circumferentially connected to a deburring root ridge. Since this, as mentioned, so far meaningful way is not possible, the invention has a great importance in the manufacturing process of injection components for the automotive industry.
Erfindungsgemäß weist die neue Düse mindestens einen Düsenkanal, vorzugsweise jedoch mindestens zwei Düsenkanäle auf, sich gegenüberliegend, vom bodenseiti- gen Endbereich der Zuführbohrung unter einem Winkel < = 90° zur Zuführbohrung in Einströmrichtung erstrecken. Dabei ist der Boden der Zuführbohrung teilweise erhaben ausgebildet, wodurch sich der Übergangsbereich zum Düsenkanal verengt.According to the invention, the new nozzle has at least one nozzle channel, but preferably at least two nozzle channels, extending opposite one another, extending from the bottom end region of the feed bore at an angle <= 90 ° to the feed bore in the inflow direction. In this case, the bottom of the feed hole is partially raised, whereby the transition region narrows to the nozzle channel.
Durch die Querschnittsverengung wird das Medium so geführt, dass eine Kavitation innerhalb des Düsenkanals und Erosionsverschleiß am Austritt des Düsenkanals weitgehend vermieden wird. Dadurch wird erreicht, dass der austretende Flüssig- keitsstrahl seine Form und Richtung stabil beibehält. Wie sich überraschend gezeigt hat, erhöht sich die Standzeit einer solchen Düse in signifikanter Weise, so dass sie gegenüber dem Stand der Technik einen bemerkenswerten Fortschritt darstellt. Die erhabene Ausbildung des Bodens der Zufuhrbohrung kann mannigfaltig ausgebildet sein. Zweckermäßigerweise ist die Erhebung zentrisch ausgebildet.Due to the cross-sectional constriction, the medium is guided so that cavitation within the nozzle channel and erosion wear at the outlet of the nozzle channel is largely avoided. This ensures that the emerging liquid jet stably maintains its shape and direction. As has surprisingly been found, the service life of such a nozzle is significantly increased, thus representing a remarkable advance over the prior art. The raised formation of the bottom of the supply hole can be formed manifold. Conveniently, the survey is centric.
Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen ge- kennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.
Ausfuhrungsbeispiele der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen beschrieben.Embodiments of the invention will be described below with reference to the accompanying drawings.
Es zeigen:Show it:
Figuren 1 und 2 jeweils eine erfindungsgemäße Düse in unterschiedlichen Bearbeitungsfallen, in einer geschnittenen SeitenansichtFigures 1 and 2 each a nozzle according to the invention in different processing traps, in a sectional side view
Figur 3 verschiedene Ausfuhrungsbeispiele der Düse, gleichfalls in geschnittenen SeitenansichtenFigure 3 different exemplary embodiments of the nozzle, also in sectioned side views
Figur 4 eine Düse in einer weiteren Funktionsstellung in einer geschnittenen Seitenansicht4 shows a nozzle in a further functional position in a sectional side view
Figuren 5 und 6 eine montierte Düse, jeweils in einem LängsschnittFigures 5 and 6 a mounted nozzle, each in a longitudinal section
In den Figuren ist eine insgesamt mit den Bezugszeichen 3 versehene Düse dargestellt, mit der ein Innenraum 1, 2 eines Werkstücks bearbeitet werden kann.In the figures, a total provided with the reference numeral 3 nozzle is shown, with an interior 1, 2 of a workpiece can be edited.
Die in den Ausfuhrungsbeispielen gezeigte Düse 3 weist zwei sich gegenüberliegende Düsenkanäle 4 auf, aus denen ein über eine zentrische Zufuhrbohrung 5 geführtes, unter hohem Druck stehendes fluides Medium austritt.The nozzle 3 shown in the exemplary embodiments has two nozzle channels 4 located opposite one another, out of which emerges a fluid medium which passes through a central feed bore 5 and is under high pressure.
Die Düsenkanäle 4 erstrecken sich dabei, ausgehend vom bodenseitigen Endbereich der als Sackloch ausgebildeten Zuführbohrung 5 unter einem Winkel < = 90° zur Zuführbohrung 5 in Einströmrichtung 14. Der Boden der Zuführbohrung 5 weist eine Erhebung auf, die bei dem in den Figuren 1 und 2 gezeigten Beispiel mit den Bezugszeichen 6 versehen ist. Diese Erhebung 6, die bei den in der Figur 3 gezeigten Ausführungsbeispiel sphärisch 20, glockenförmig 21, kegelförmig 22, kegelstumpfförmig 23 und zylinderförmig 24 aus- gebildet ist, verengt den Übergangsbereich zu den Düsenkanälen 4.The nozzle channels 4 extend, starting from the bottom end region of the feed bore 5 formed as a blind hole at an angle <= 90 ° to the feed bore 5 in the inflow direction 14. The bottom of the feed bore 5 has an elevation, which is provided in the example shown in Figures 1 and 2 by the reference numeral 6. This elevation 6, which is embodied spherically in the exemplary embodiment shown in FIG. 3, bell-shaped 21, conical 22, frusto-conical 23 and cylindrical 24, narrows the transition region to the nozzle channels 4.
In der Figur 1 mündet der Innenraum 1 in den Innenraum 2, wobei sich bei der Fertigung im Bereich der gemeinsamen Kante 10, 11 ein Wurzelgrat herausbildet, der durch den aus den Düsenkanälen 4 austretenden Flüssigkeitsstrahl beseitig wird.In the figure 1, the interior 1 opens into the interior 2, wherein in the production in the region of the common edge 10, 11 a Wurzelgrat forms, which is eliminated by the exiting the nozzle channels 4 liquid jet.
Dabei setzt eine nicht dargestellte Pumpe das flüssige Medium, üblicherweise Wasser oder eine Emulsion, unter einen Druck von 400 bis 4000 bar, vorzugsweise 1500 bis 2500 bar. Eine Entspannung des Drucks erfolgt in den Düsenkanälen 4 unter Umwandlung der potentiellen in kinetische Energie. Der Flüssigkeitsstrahl trifft mit hoher Geschwindigkeit auf die Kanten 10, 11 bzw. den dort vorhandenenIn this case, a pump, not shown, the liquid medium, usually water or an emulsion, under a pressure of 400 to 4000 bar, preferably 1500 to 2500 bar. A relaxation of the pressure takes place in the nozzle channels 4 while converting the potential into kinetic energy. The liquid jet hits the edges 10, 11 or the existing ones at high speed
Wurzelgrat und trägt diesen ab, bis die gewünschte Kantenform erzielt ist.Wurzelgrat and wears it off until the desired edge shape is achieved.
Durch die spitzwinklige Strömungsführung in Verbindung mit der Verengung des Übergangsbereichs zu den Düsenkanälen wird erreicht, dass sich Verschleißzonen 19 innerhalb der Düsenkanäle und am Kanalaustritt nicht oder nur sehr langsam ausbilden. Der Winkel α i, und α 2, unter dem die Düsenkanäle 4 verlaufen, ist in den Figuren 1 und 2 mit den Bezugszeichen 7 und 8 versehen.Due to the acute-angled flow guidance in conjunction with the constriction of the transition region to the nozzle channels is achieved that wear zones 19 form within the nozzle channels and at the channel outlet not or only very slowly. The angle α i, and α 2, under which the nozzle channels 4 extend is provided in Figures 1 and 2 by the reference numerals 7 and 8.
In der Figur 2 ist der Einsatz der Düse zur Oberflächenbearbeitung des Innenrau- mes 1 gezeigt.FIG. 2 shows the use of the nozzle for surface treatment of the inner chamber 1.
Die Anordnung bzw. Erstreckung der Düsenkanäle 4 entspricht der in der Figur 1 gezeigten.The arrangement or extent of the nozzle channels 4 corresponds to that shown in FIG.
Durch die spitzen Kanalwinkel 7, 8 wird neben der Unterdrückung des Verschleißes in den Zonen 19 eine günstige Rückströmung 13 des abfließenden Fluids erzielt. Dabei bildet sich kein Puffer zwischen dem Flüssigkeitsstrahl und der zu bearbeitenden Oberfläche 12 des Innenraumes 1, so dass Rückstände sicher ausgespült werden.Due to the acute channel angle 7, 8 a favorable return flow 13 of the outflowing fluid is achieved in addition to the suppression of wear in the zones 19. In this case, no buffer is formed between the liquid jet and the surface 12 to be processed of the inner space 1, so that residues are flushed out safely.
Die Form und genaue Lage der Ausführungsvarianten der Erhebungen 6 und 20 bisThe shape and exact location of the embodiments of the surveys 6 and 20 to
24 sind abhängig von den Parametern Mediumdruck, Volumenstrom, Durchmesser der Zuführbohrung 5 und der Anzahl und den Durchmessern der Düsekanäle 4.24 are dependent on the parameters medium pressure, flow rate, diameter of the feed bore 5 and the number and diameters of the nozzle channels. 4
In der Figur 4 ist der Übergang von dem im Querschnitt kleineren Innenraum 1 in den im Querschnitt größeren Innenraum 2 dargestellt. Optimale Ergebnisse in Hinsicht auf die Qualität und Bearbeitungszeit bei der Bearbeitung der Kante 11 zum Entfernen eines Wurzelgrates werden erzielt, wenn der Flüssigkeitsstrahl die Düsenkanäle 4 unter einem Winkel α verlässt, der einem halben Winkel ß (Bezugszeichen 18) entspricht. Verändert sich die Kante 11 über die Länge, so sollte der op- timale Winkel α dem arithmetischen Mittelwert aus dem maximalen und minimalen Kantenwinkel ß 18 entsprechen.FIG. 4 shows the transition from the smaller inner space 1 in cross-section into the larger inner space 2. Optimum results in terms of quality and processing time in machining the root deburring edge 11 are achieved when the liquid jet leaves the nozzle channels 4 at an angle α equal to one half angle β (reference 18). If the edge 11 changes over the length, then the optimum angle α should correspond to the arithmetic mean of the maximum and minimum edge angle β 18.
In den Figuren 5 und 6 ist erkennbar, dass die Düse 3 als Lanzendüse ausgebildet ist, die auf ihrer den Düsenkanälen 4 abgewandten Seite ein Bündchen 25 aufweist, das in einer Lageröffnung 17 eines Düsenhalters 15 einliegt.In FIGS. 5 and 6 it can be seen that the nozzle 3 is designed as a lance nozzle which, on its side facing away from the nozzle channels 4, has a cuff 25 which rests in a bearing opening 17 of a nozzle holder 15.
Das Bündchen 25 liegt mit seiner Unterseite auf einer Dichtung 16 auf, die am Grund der Lageröffnung 17 positioniert ist.The cuff 25 lies with its underside on a seal 16 which is positioned at the bottom of the bearing opening 17.
Baut sich ein hydraulischer Druck auf, wirkt dieser auf das Bündchen 25 und dieIf a hydraulic pressure builds up, it acts on the cuff 25 and the
Dichtung 16. Dadurch wird selbsttätig eine Dichtungspressung erzielt, die dem Verhältnis aus der Kreisfläche des Bündchens 25 zur Ringfläche der Dichtung 16, multipliziert mit dem aufgebrachten Druck entspricht.Seal 16. As a result, a seal pressure is automatically achieved, which corresponds to the ratio of the circular area of the collar 25 to the annular surface of the seal 16 multiplied by the applied pressure.
Die Düse 3 wird somit nicht durch eine extern aufgebrachte Vorspannkraft vorgespannt, was für die Ausrichtung der Düse 3 und damit für die Genauigkeit des Verfahrens ungünstig sein könnte. Da die Düse 3 entgegen der Einströmrichtung 14 axial bewegbar ist, besteht für die Düse 3 im drucklosen Zustand ein Kollisionsschutz, sollte die Düse beim Einfahren auf ein Hindernis stoßen oder falsch positioniert sein.The nozzle 3 is thus not biased by an externally applied biasing force, which could be unfavorable for the alignment of the nozzle 3 and thus for the accuracy of the process. Since the nozzle 3 against the inflow direction 14 is axially movable, there is a collision protection for the nozzle 3 in the unpressurized state, should the nozzle encounter an obstacle when retracted or be positioned incorrectly.
Wie die Figur 6 verdeutlicht, kann die Düse 3 durch einen Drehantrieb in eine Rotationsbewegung versetzt und mit Drehzahlen im Bereich von 50 bis 3000 min"1, vorzugsweise 200 bis 1500 min"1 betrieben werden, je nach Aufgabenstellung und dem zu bearbeitenden Material. Durch einen Roboter kann die Düse 3 eine Schwenkbewegung um die Längsachse und/oder oszillierende Hubbewegung aus- führen.As Figure 6 illustrates, the nozzle 3 can be rotated by a rotary drive and operated at speeds in the range of 50 to 3000 min "1 , preferably 200 to 1500 min " 1 , depending on the task and the material to be processed. By a robot, the nozzle 3 can perform a pivoting movement about the longitudinal axis and / or oscillating stroke movement.
Bei sich kreuzenden Innenräumen 1, 2 und bei sich schneidenden Kanten 10, 11 wird die Düse 3 zum Entgraten in den jeweils kleineren Innenraum 1 eingeführt, dessen kleinster Durchmesser im Bereich von 1 bis 30 mm, vorzugsweise im Be- reich von 2 bis 10 mm liegt. In intersecting internal spaces 1, 2 and at intersecting edges 10, 11, the nozzle 3 is introduced for deburring in the respective smaller inner space 1, the smallest diameter in the range of 1 to 30 mm, preferably in the range of 2 to 10 mm lies.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Innenraum1 interior
2 Innenraum2 interior
3 Düse3 nozzle
4 Düsenkanal4 nozzle channel
5 Zufuhrbohrung5 feed hole
6 Erhebung6 survey
7 Kanalwinkel7 channel angle
8 Kanalwinkel8 channel angles
9 Übergangsbereich9 transition area
10 Kante10 edge
11 Kante11 edge
12 Innenraum12 interior
13 Rückströmung13 return flow
14 Einströmrichtung14 inflow direction
15 Düsenhalter15 nozzle holders
16 Dichtung16 seal
17 Lageröffhung17 camp opening
18 Winkel 1818 angle 18
19 Verschleißzone19 wear zone
20 sphärische Erhebung20 spherical survey
21 glockenförmige Erhebung21 bell-shaped elevation
22 kegelförmige Erhebung22 conical elevation
23 kegelstumpfförmige Erhebung23 frustoconical survey
24 zylinderförmige Erhebung24 cylindrical elevation
25 Bündchen 25 cuffs

Claims

Ansprüche claims
1. Düse zur Bearbeitung eines insbesondere mechanisch bearbeiteten Innenraumes (1, 2) eines Werkstücks mittels eines aus mindestens einem Düsenkanal (4) austretenden, unter hohem Druck stehenden fluiden Mediums, wobei der1. nozzle for processing a particular mechanically machined interior (1, 2) of a workpiece by means of a from at least one nozzle channel (4) emerging, under high pressure fluid medium, wherein the
Düsenkanal (4) von einer im Sinne eines Sacklochs ausgebildeten Zuführbohrung (5) abzweigt, dadurch gekennzeichnet, dass sich der Düsenkanal (4), ausgehend vom bodenseitigen Endbereich der Zuführbohrung (5) unter einem Winkel < = 90° zur Zuführbohrung (5) in Einströmrichtung erstreckt, wobei der Boden der Zuführbohrung mit einer Erhebung (6) versehen ist und dabei den Übergangsbereich zum Düsenkanal (4) verengt.Düsenkanal (4) branches off from a blind hole formed in the feed bore (5), characterized in that the nozzle channel (4), starting from the bottom end portion of the feed bore (5) at an angle <= 90 ° to the feed bore (5) in Inlet direction extends, wherein the bottom of the feed bore is provided with a protrusion (6) and thereby narrows the transition region to the nozzle channel (4).
2. Düse nach Anspruch 1, dadurch gekennzeichnet, dass die Erhebung (6) sphärisch (20), glockenförmig (21), kegelförmig (22), kegelstumpfförmig (23) oder zylinderförmig (24) ist.2. Nozzle according to claim 1, characterized in that the elevation (6) is spherical (20), bell-shaped (21), conical (22), frusto-conical (23) or cylindrical (24).
3. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Erhebung (6) zentrisch angeordnet ist.3. Nozzle according to claim 1 or 2, characterized in that the elevation (6) is arranged centrally.
4. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwei Düsenkanäle (4) sich gegenüberliegend vorgesehen sind.4. Nozzle according to one of the preceding claims, characterized in that two nozzle channels (4) are provided opposite one another.
5. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Düse als Düsenlanze ausgebildet ist, die in einem Düsenhalter (15) gelagert ist.5. Nozzle according to one of the preceding claims, characterized in that the nozzle is designed as a nozzle lance, which is mounted in a nozzle holder (15).
6. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Düse an ihrem dem Düsenkanal (4) abgewandten Ende ein Bündchen (25) aufweist, das in einer Lageröffnung (17) des Düsenhalters (15) einliegt.6. Nozzle according to one of the preceding claims, characterized in that the nozzle at its end remote from the nozzle channel (4) has a cuff (25) which rests in a bearing opening (17) of the nozzle holder (15).
7. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Bündchen (25) und dem Grund der Lageröffnung (17) eine Dichtung (16) angeordnet ist. 7. Nozzle according to one of the preceding claims, characterized in that between the cuff (25) and the bottom of the bearing opening (17) a seal (16) is arranged.
8. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Düse (3) in dem Düsenhalter (15) axial bewegbar gelagert ist.8. Nozzle according to one of the preceding claims, characterized in that the nozzle (3) in the nozzle holder (15) is mounted axially movable.
9. Düse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Düse (3) gemeinsam mit dem Düsenhalter (15) drehbar, um ihre9. Nozzle according to one of the preceding claims, characterized in that the nozzle (3) rotatable together with the nozzle holder (15) to their
Längsachse schwenkbar und/oder in axialer Richtung oszillierend bewegbar ist.Longitudinal axis pivotally and / or oscillating in the axial direction is movable.
10. Verfahren zur Bearbeitung eines insbesondere mechanisch bearbeiteten Innen- raumes eines Werkstücks mittels einer Düse mit den Merkmalen des Anspruchs 1, dadurch gekennzeichnet, dass die Düse (3) in den zu bearbeitenden Innenraum (1, 2) geführt und die zu bearbeitende Stelle direkt mit dem austretenden fluiden Medium beaufschlagt wird.10. A method for processing a particular mechanically machined inner space of a workpiece by means of a nozzle with the features of claim 1, characterized in that the nozzle (3) in the interior to be machined (1, 2) out and the point to be processed directly is acted upon by the exiting fluid medium.
11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass der an der Kante11. The method according to claim 10, characterized in that at the edge
(10, 11) zwischen zwei Innenräumen (1, 2) gebildete Grat direkt mit dem aus dem Düsenkanal (4) austretenden fluiden Medium beaufschlagt wird.(10, 11) formed between two interior spaces (1, 2) burr is directly applied to the fluid emerging from the nozzle channel (4).
12. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass die O- berfläche des Innenraumes (1, 2) direkt mit dem aus dem Düsenkanal (4) austretenden fluiden Medium beaufschlagt wird.12. The method according to claim 10 or 11, characterized in that the O- berfläche of the inner space (1, 2) directly from the nozzle channel (4) exiting fluid medium is applied.
13. Verfahren nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass bei Beaufschlagung des an der Kante (10, 11) gebildeten Grates das flui- de Medium unter einem Winkel auf den Grat auftrifft, der der im Radialschnitt13. The method according to any one of claims 10 to 12, characterized in that upon application of the edge formed on the edge (10, 11), the fluid medium impinges at an angle on the ridge, which in the radial section
Winkelhalbierenden der gebildeten Kante (10, 11) entspricht.Angle bisector of the formed edge (10, 11) corresponds.
14. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei einem räumlich veränderten Winkel der Kante (10, 11) die Richtung des fluiden Mediums dem Mittelwert der im Radialschnitt maximalen und minimalen Winkel der Winkelhalbierenden der Kante (10, 11) entspricht. 14. The method according to any one of the preceding claims, characterized in that at a spatially changed angle of the edge (10, 11), the direction of the fluid medium corresponds to the average of the maximum and minimum angle in the radial section of the bisectors of the edge (10, 11).
15. Verfahren nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, dass die Düse (3) in Funktionsstellung durch den hydraulischen Druck selbsttätig auf eine Dichtung (16) in einem Düsenhalter (15) gepresst wird.15. The method according to any one of claims 10 to 14, characterized in that the nozzle (3) in the functional position by the hydraulic pressure automatically on a seal (16) in a nozzle holder (15) is pressed.
16. Verfahren nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, dass der Druck des zugeführten fluiden Mediums 400 bis 4000 bar, vorzugsweise 1500 bis 2500 bar beträgt.16. The method according to any one of claims 10 to 15, characterized in that the pressure of the supplied fluid medium is 400 to 4000 bar, preferably 1500 to 2500 bar.
17. Verfahren nach einem der Ansprüche 10 bis 16, dadurch gekennzeichnet, ddaassss ddiiee DDüüssee ((33)) mmiitt < einer Drehzahl von 50 bis 3000 min"1, vorzugsweise 200 bis 1500 min"1 rotiert. 17. The method according to any one of claims 10 to 16, characterized in that ddaassss Ddiiee Düsseee ((33)) mmiitt <a speed of 50 to 3000 min "1 , preferably 200 to 1500 min " 1 rotates.
EP06754897A 2005-06-20 2006-04-27 Nozzle and method for treating an interior of a workpiece Active EP1901894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005028710 2005-06-20
PCT/EP2006/061888 WO2006136470A1 (en) 2005-06-20 2006-04-27 Nozzle and method for treating an interior of a workpiece

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EP1901894A1 true EP1901894A1 (en) 2008-03-26
EP1901894B1 EP1901894B1 (en) 2010-11-03

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EP (1) EP1901894B1 (en)
JP (1) JP2008544150A (en)
AT (1) ATE486702T1 (en)
DE (1) DE502006008235D1 (en)
ES (1) ES2355292T3 (en)
WO (1) WO2006136470A1 (en)

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WO2006136470A1 (en) 2006-12-28
ES2355292T3 (en) 2011-03-24
JP2008544150A (en) 2008-12-04
US8561918B2 (en) 2013-10-22
US20090218422A1 (en) 2009-09-03
EP1901894B1 (en) 2010-11-03
ATE486702T1 (en) 2010-11-15
DE502006008235D1 (en) 2010-12-16

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