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EP2136927B1 - Divergent pour l'extrusion thermique et procédé de fabrication de celui-ci - Google Patents

Divergent pour l'extrusion thermique et procédé de fabrication de celui-ci Download PDF

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Publication number
EP2136927B1
EP2136927B1 EP08735291A EP08735291A EP2136927B1 EP 2136927 B1 EP2136927 B1 EP 2136927B1 EP 08735291 A EP08735291 A EP 08735291A EP 08735291 A EP08735291 A EP 08735291A EP 2136927 B1 EP2136927 B1 EP 2136927B1
Authority
EP
European Patent Office
Prior art keywords
expansion nozzle
nozzle
expansion
region
inner contour
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.)
Active
Application number
EP08735291A
Other languages
German (de)
English (en)
Other versions
EP2136927A1 (fr
Inventor
Markus Dirscherl
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.)
HERMLE MASCHINENBAU GmbH
Original Assignee
HERMLE MASCHINENBAU 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 HERMLE MASCHINENBAU GmbH filed Critical HERMLE MASCHINENBAU GmbH
Publication of EP2136927A1 publication Critical patent/EP2136927A1/fr
Application granted granted Critical
Publication of EP2136927B1 publication Critical patent/EP2136927B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles

Definitions

  • the invention relates to a method for producing an expansion nozzle, which is used in particular for thermal spraying.
  • nozzles made by this method can also be used in a variety of other applications.
  • the mold When using such nozzles to produce a supersonic flow, the mold must be designed in the divergent region of the nozzle so that the increase in cross-section is continuous and with a not too large gradient in order to avoid skewed impacts. Accordingly, there are a variety of forms from the conical enlargement up to the optimized by the characteristic method parallel jet nozzle as in EP 1506816A1 described. Also known are forms in which the convergent divergent transition is formed by a displacer mounted in a cylindrical tube ( EP 1369498B1 ). The production of such nozzles, especially if they have a small narrowest cross-section, leads due to the above requirement to considerable technical problems.
  • the interior of the entire nozzle has the contour of a single-walled hyperboloid whose generatrix is a straight line.
  • the expansion nozzle can be made particularly simple and relatively inexpensive.
  • the material for the expansion nozzle must be electrically conductive.
  • a metal esp., A hard metal
  • a ceramic-like material eg. B. carbon fiber reinforced silicon carbide (C-SiC).
  • the inner contour of the expansion nozzle and a surface treatment such. As polishing and / or coating.
  • the ratio of the length of the convergent to the divergent region can be arbitrarily set.
  • ellipsoid hyperboloids can also be generated, which can generate a flat gas jet.
  • the divergent and / or the convergent region can be extended by means of an attachment element.
  • This attachment element may, according to an embodiment variant, have an inner contour continuing the hyperboloid or else an inner contour deviating from the hyperboloid.
  • the convergent region is coated with a gaseous or liquid wall-wetting film.
  • the main purpose of this film is to cool the expansion nozzle to increase its life and bring the temperature of the core streams to the limit of temperature stability of the nozzle material.
  • the suitable design forms a free wall surface for the supersonic jet and allows the formation of a parallel beam.
  • the shape and the deflection of the supersonic jet can thus also be varied.
  • the expansion nozzle 1 has a convergent region 2, a divergent region 3 and a continuous transition region 4.
  • the spray particles in the convergent region 2 are accelerated to subsonic speed.
  • the gas reaches the speed of sound and in the divergent region 3 finally the spray particles are further accelerated and reach supersonic speed.
  • the transition region 4 between the convergent region 2 and the divergent region 3 is formed in such an arc shape that the entire inner contour of convergent region 2, divergent region 3 and transition region 4 is formed as a single-shell hyperboloid. whose minor axis 5 lies in the narrowest cross section 4 and whose main axis forms the axis of rotation 6 of the expansion nozzle 1.
  • the convergent and / or the divergent region 2, 3 can be extended with an attachment element, which can have either an inner contour continuing the hyperboloid or an inner contour deviating from the hyperboloid.
  • a gaseous or liquid wall-wetting film can be applied to cool the expansion nozzle 1 to thus increasing the service life and bring the temperature of the core flows to the limit of the temperature stability of the nozzle material. Furthermore, it can be prevented deposition of particles.
  • the basic form of the expansion nozzle 1 according to the invention is single-shell hyperboloid, a three-dimensional geometric surface which is generated by rotation of a straight line offset from the central axis (cf. Fig. 3 ).
  • the expansion nozzle 1 according to the invention is produced by wire erosion, wherein the cutting wire 7 is skewed about the axis of rotation 6 of the expansion nozzle 1 rotates.
  • a hyperbolic inner contour of the expansion nozzle 1 is produced, in which the convergent region 2, the divergent region 3 merge into one another without points of discontinuity.
  • the expansion nozzle 1 consists of an electrically conductive material, for.
  • a metal preferably a hard metal, or a ceramic-like material, for.
  • the inner contour of the expansion nozzle 1 also a surface treatment such. As polishing and / or coating. This can also be done via a rectilinear polishing body, which performs the same rotational movement as the cutting wire. 7
  • the geometry obtained may be obtained by any method, e.g. Senkerod Schlieren be post-processed to at least partially obtain a shape that differs from the shape of the single-sheet hyperboloids. Such modifications may e.g. be used for the design of a parallel jet nozzle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Nozzles (AREA)

Claims (5)

  1. Procédé de fabrication d'un divergent pour l'extrusion thermique de particules extrudées pulvérulentes, sachant que le divergent présente une zone convergente et une zone divergente avec une section transversale la plus étroite se trouvant entre ces dernières, et sachant que le contour présente la forme d'un hyperboloïde à une nappe, caractérisé en ce que le contour intérieur du divergent (1) est fabriqué par étincelage par fil, sachant que le fil de coupe (7) tourne de manière inclinée autour de l'axe de rotation (6) du divergent (1).
  2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise comme matériau pour le divergent (1) un matériau électroconducteur.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on utilise un métal, en particulier un métal dur.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on utilise une matière identique à de la céramique, par exemple le carbure de silicium (C-SiC) renforcé en fibres de carbone.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le contour intérieur du divergent (1) est soumis à un traitement de surface, tel que le polissage et/ou l'enduction.
EP08735291A 2007-04-16 2008-04-16 Divergent pour l'extrusion thermique et procédé de fabrication de celui-ci Active EP2136927B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017766 2007-04-16
PCT/EP2008/003055 WO2008125356A1 (fr) 2007-04-16 2008-04-16 Divergent pour l'extrusion thermique et procédé de fabrication de celui-ci

Publications (2)

Publication Number Publication Date
EP2136927A1 EP2136927A1 (fr) 2009-12-30
EP2136927B1 true EP2136927B1 (fr) 2012-03-21

Family

ID=39493610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735291A Active EP2136927B1 (fr) 2007-04-16 2008-04-16 Divergent pour l'extrusion thermique et procédé de fabrication de celui-ci

Country Status (3)

Country Link
EP (1) EP2136927B1 (fr)
AT (1) ATE550453T1 (fr)
WO (1) WO2008125356A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226690A1 (de) 2013-01-04 2014-07-10 Ford-Werke Gmbh Vorrichtung zum thermischen Beschichten einer Oberfläche
DE102013200067A1 (de) 2013-01-04 2014-07-10 Ford-Werke Gmbh Vorrichtung zum thermischen Beschichten einer Oberfläche

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106962C2 (de) * 1981-02-25 1986-12-04 Lechler Gmbh & Co Kg, 7012 Fellbach Zweistoff-Zerstäubungsdüse
DE10001983A1 (de) * 2000-01-19 2001-07-26 Zueblin Ag Beschleunigungsmonitor
DE10126320A1 (de) * 2001-05-30 2002-12-05 Thela Gummi Produktions Und Ha Strahldüse
US20030219544A1 (en) * 2002-05-22 2003-11-27 Smith William C. Thermal spray coating process with nano-sized materials
US20050173556A1 (en) * 2004-02-09 2005-08-11 Kui-Chiu Kwok Coating dispensing nozzle
DE102005038453B4 (de) * 2005-08-03 2011-06-09 TTI-Technologie-Transfer-Initiative GmbH an der Universität Stuttgart Verfahren und Vorrichtung zum thermischen Spritzen von Suspensionen

Also Published As

Publication number Publication date
ATE550453T1 (de) 2012-04-15
WO2008125356A1 (fr) 2008-10-23
EP2136927A1 (fr) 2009-12-30

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