EP1616464A1 - Düse für plasmabrenner - Google Patents
Düse für plasmabrennerInfo
- Publication number
- EP1616464A1 EP1616464A1 EP04728515A EP04728515A EP1616464A1 EP 1616464 A1 EP1616464 A1 EP 1616464A1 EP 04728515 A EP04728515 A EP 04728515A EP 04728515 A EP04728515 A EP 04728515A EP 1616464 A1 EP1616464 A1 EP 1616464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- microparticles
- embedded
- nozzle according
- metal
- 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
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3457—Nozzle protection devices
Definitions
- the invention relates to a nozzle for plasma torches and a method for producing such nozzles.
- a nozzle essentially consists of a metal or a metal alloy with an increased thermal conductivity.
- a nozzle of a plasma torch is usually cooled. It can be used for plasma welding and preferably for plasma cutting.
- Plasma torches are known to have two extremely stressed elements. These are, on the one hand, the electrode connected as a cathode, which is arranged inside a plasma torch, and, on the other hand, the corresponding nozzle through which the plasma jet is directed onto the respective workpiece surface.
- the nozzle of such plasma torches is also passed through the very high temperatures and additionally by the flow kinetics of the hot plasma jet exiting through the nozzle opening and having a high flow velocity are considerably burdened.
- these influences which may be increased by plasma pressure fluctuations, metallic nozzle material is removed, and delamination, crater formation or chipping are often unavoidable.
- the conventional nozzles used on plasma torches also have a relatively short service life and therefore have to be replaced regularly, so that the wear-related replacement of nozzles represents a cost factor for such systems.
- this object is achieved with a nozzle for plasma torches, which has the features of claim 1 and a manufacturing method for such nozzles according to claim 13.
- the nozzles for plasma torches according to the invention essentially consist of metal or a metal alloy, preferably copper or a copper alloy.
- wear-resistant microparticles of a hard material are at least partially embedded in the metal or the metal alloy. The strength can be increased as a result of the embedded microparticles, but at the same time the thermal conductivity, which is a prerequisite for effective cooling of the nozzles according to the invention, is reduced only to a negligible extent.
- microparticles embedded in the metal matrix should not exceed a maximum grain size of 30 ⁇ m, preferably 15 ⁇ m. Microparticles whose grain size is in the nanometer range can also be embedded, so that the term microparticle chosen for the invention is also intended to include a grain size range between 0.01 to 30 ⁇ m.
- Microparticles with an almost constant grain size can have been embedded in the metal or metal alloy, from which the actual nozzle for plasma torches essentially consists.
- microparticles can also be embedded within a predeterminable grain size spectrum, the mean grain size d 50 of such a grain size spectrum then being around a grain size in the range between 1 and 5 ⁇ m. Particles that are smaller than 1 ⁇ m (up to 0.01 ⁇ m) can be embedded.
- microparticles to be embedded according to the invention should consist of a ceramic hard material.
- Carbides and here again silicon carbide or boron carbide, have proven particularly suitable. provides.
- the carbides in particular reduce the thermal conductivity of the nozzle material only slightly and can also be used inexpensively.
- microparticles from at least two of the chemical compounds described above into the metal forming the nozzle or the metal alloy, so that, if necessary, optimization can be achieved with regard to the achievable strength, wear resistance and the desired thermal conductivity.
- microparticles to be embedded according to the invention can be arranged distributed within the total volume of a nozzle.
- microparticles can be embedded in the area facing the inside of the nozzle, so that the thermal and flow kinetic influences can be better controlled there.
- locally differentiated embedding of microparticles can also be set, with certain volume ranges being free of microparticles are. This can be achieved, for example, by embedding microparticles in the form of strips, spirals or rings, whereby several such strips, spirals or rings separated from one another can also be formed.
- the embedded microparticles should fill a volume fraction of 0.5 to a maximum of 15% of the total volume of a nozzle according to the invention. However, a maximum volume share of 10% can be sufficient to achieve the desired effects.
- the nozzles for plasma torches according to the invention can advantageously be produced in such a way that a powder mixture of the metal or metal alloy used, preferably copper or copper alloy with the respective microparticles, is subjected to a preferably hydrostatic extrusion process.
- At least a fully or hollow cylindrical shape can be formed and a sufficient density of the nozzle material can be achieved.
- the final nozzle contour can also be formed exclusively by a forming process, without machining.
- powdery electrolytic copper was mixed intensively with 4% by mass of silicon carbide powder.
- a cylinder with an outer diameter of approximately 20 mm and a length of 250 mm was produced from the powder mixture by cold isostatic pressing.
- This cylindrical insert was inserted into a copper cylinder with a corresponding inner bore, which had an outer diameter of 80 mm.
- the outer diameter was then reduced to 23 mm by extrusion.
- the cylindrical body obtained in this way had a core area with a diameter of 3.8 mm, in which the silicon particles are embedded.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Arc Welding In General (AREA)
- Plasma Technology (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Nozzles (AREA)
- Coating By Spraying Or Casting (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10323014A DE10323014B4 (de) | 2003-04-23 | 2003-04-23 | Düse für Plasmabrenner |
| PCT/DE2004/000889 WO2004095896A1 (de) | 2003-04-23 | 2004-04-21 | Düse für plasmabrenner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1616464A1 true EP1616464A1 (de) | 2006-01-18 |
| EP1616464B1 EP1616464B1 (de) | 2009-07-22 |
Family
ID=33305221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04728515A Expired - Lifetime EP1616464B1 (de) | 2003-04-23 | 2004-04-21 | Düse für plasmabrenner |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7645959B2 (de) |
| EP (1) | EP1616464B1 (de) |
| AT (1) | ATE437555T1 (de) |
| DE (2) | DE10323014B4 (de) |
| WO (1) | WO2004095896A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016119984A1 (de) | 2016-10-20 | 2018-04-26 | Röder Maschinenbau GmbH | Verfahren und Einsatz zur Wiederaufbereitung von Verschleißteilen von Strahlschneidern sowie Bauteil zur Aufnahme eines Einsatzes |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS441240Y1 (de) * | 1965-06-30 | 1969-01-18 | ||
| US3597576A (en) * | 1969-07-15 | 1971-08-03 | Dover Corp | Spatter and heat shield for welding gun |
| DE2142331A1 (de) * | 1971-08-24 | 1973-03-08 | Messer Griesheim Gmbh | Duesenkoerper fuer plasmaschneid- und/ oder schweissbrenner |
| EP0194634A3 (de) * | 1985-03-14 | 1987-11-19 | The Perkin-Elmer Corporation | Plasmabrenner mit langer Lebensdauer |
| SE452862B (sv) * | 1985-06-05 | 1987-12-21 | Aga Ab | Ljusbagselektrod |
| NL8800767A (nl) * | 1988-03-28 | 1989-10-16 | Philips Nv | Plasmatoorts. |
| US4982067A (en) * | 1988-11-04 | 1991-01-01 | Marantz Daniel Richard | Plasma generating apparatus and method |
| US5122182A (en) * | 1990-05-02 | 1992-06-16 | The Perkin-Elmer Corporation | Composite thermal spray powder of metal and non-metal |
| JP2591371Y2 (ja) * | 1993-02-24 | 1999-03-03 | 株式会社小松製作所 | プラズマアークトーチ |
| FR2787676B1 (fr) * | 1998-12-18 | 2001-01-19 | Soudure Autogene Francaise | Piece d'usure pour torche de travail a l'arc realisee en cuivre allie |
| FR2805958B1 (fr) * | 2000-03-06 | 2002-06-28 | Air Liquide | Torche a plasma equipee d'une coiffe de protection en ceramique |
| FR2813158A1 (fr) | 2000-08-18 | 2002-02-22 | Air Liquide | Electrode pour torche a plasma a insert emissif de duree de vie amelioree |
| DE10044764A1 (de) * | 2000-09-11 | 2002-04-04 | Ewm Hightec Welding Gmbh | Vorrichtung zum Plasmaschweißen und/oder Plasmaschneiden |
-
2003
- 2003-04-23 DE DE10323014A patent/DE10323014B4/de not_active Expired - Fee Related
-
2004
- 2004-04-21 EP EP04728515A patent/EP1616464B1/de not_active Expired - Lifetime
- 2004-04-21 US US10/554,051 patent/US7645959B2/en not_active Expired - Fee Related
- 2004-04-21 WO PCT/DE2004/000889 patent/WO2004095896A1/de not_active Ceased
- 2004-04-21 DE DE502004009784T patent/DE502004009784D1/de not_active Expired - Lifetime
- 2004-04-21 AT AT04728515T patent/ATE437555T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004095896A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004095896A1 (de) | 2004-11-04 |
| DE10323014B4 (de) | 2007-11-22 |
| DE502004009784D1 (de) | 2009-09-03 |
| ATE437555T1 (de) | 2009-08-15 |
| US7645959B2 (en) | 2010-01-12 |
| US20070056936A1 (en) | 2007-03-15 |
| EP1616464B1 (de) | 2009-07-22 |
| DE10323014A1 (de) | 2004-11-25 |
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