EP1796875A1 - Fokussierdüse - Google Patents
FokussierdüseInfo
- Publication number
- EP1796875A1 EP1796875A1 EP05769987A EP05769987A EP1796875A1 EP 1796875 A1 EP1796875 A1 EP 1796875A1 EP 05769987 A EP05769987 A EP 05769987A EP 05769987 A EP05769987 A EP 05769987A EP 1796875 A1 EP1796875 A1 EP 1796875A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- focusing
- hard
- coating
- abrasivwasserstrahlschneiden
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
Definitions
- the invention relates to a sierdüse for Abrasivementstrahlde consisting of a nozzle body made of hard metal which is penetrated by a bore for focusing the cutting beam and wherein at least the bore wall is provided with a single or multi-layer hard material coating.
- Such focussing nozzles are part of cutting heads for Abrasivwasserstrahltre in which the cutting water jet and used for cutting abrasive such as corundum or sand are mixed in a mixing chamber to increase the cutting action of the cutting water jet.
- the focusing nozzles serve to accelerate and center the water jet and the simultaneously supplied abrasive.
- the focusing nozzles on the inlet side are usually funnel-shaped widened, the adjoining, the focusing nozzle passing through bore has a diameter in the range of about 0.2 - 1, 5 mm.
- WO 98/15386 describes a focusing nozzle which is provided on the inner wall with a wear-resistant diamond-like layer of amorphous carbon (DLC).
- the layer is applied by means of a laser ARC coating method, wherein a highly activated plasma has to be produced in vacuum by means of a pulsed, arc discharge between a source of the coating material and the nozzle to be coated.
- the surface to be coated must be freely accessible, so that one has to divide the focusing nozzle for coating the bore wall into several segments and these segments must again close together after coating, which is associated with considerable effort.
- the object of the present invention is therefore to provide the inner wall of a focusing nozzle made of hard metal with a coating which is sufficiently resistant to wear and at the same time can be easily applied without complicated segmentation of the nozzle.
- the hard material coating has a layer with titanium nitride content at least on the free surface. It was not to be expected that the use of such a coating as a hard material layer would result in a significant improvement in the wear resistance of focusing nozzles since the hardness of the titanium nitride layer on the surface is barely higher than the hardness of the hard metal base material used and significantly lower than the hardness a diamond-like layer (DLC) which is already used for coating such focusing nozzles according to the prior art described above.
- the coating according to the invention can be produced in one or more layers with application of other hard material layers, it is only important that the layer lying on the surface has a Titanium nitride portion has.
- the coating according to the invention is easily possible by CVD methods.
- the reaction gases can be selectively directed through the bore of the focusing nozzle, so that the complex multiple segmentation of the nozzle body according to the prior art can be avoided.
- the increase in service life of focusing nozzles with the coating according to the invention over focusing nozzles made of uncoated carbide is outstanding and extends up to a doubling of the service life.
- the surprising increase in life due to the low hardness differences between the base material and coating is presumably due to the fact that it is reinforced by z.T. present low pH values, comes to a surface corrosion, which causes a release of the binding metal from the hard metal alloy.
- the remaining superficial hard material skeleton has a significantly lower abrasion resistance than a hard metal alloy completely bonded with binder metal.
- the coating according to the invention largely prevents surface corrosion and thus triggering of a binder.
- the basic material for the focusing nozzle is a carbide with up to
- focusing nozzles of 76 mm in length, 9 mm in outer diameter and 0.7 mm in bore diameter were produced by extrusion molding and sintering.
- the focusing nozzles had a hardness of 2550 HV 10 .
- a portion of the focusing nozzles on the surface, including the bore wall, was coated with a 6.5 ⁇ m thick TiN layer by a medium temperature CVD method.
- the layer hardness was about 2450 HV O i.
- the focussing nozzles had a golden yellow color.
- Focusing nozzles were prepared according to Example 1. A portion of these focusing nozzles were surface coated, including the bore wall, with a medium temperature CVD process with a two-ply hard coating of an 8 micron TiCN layer and a 4 micron thick TiN layer, with the top layer of the coating being the TiN layer , The hardness of the coating was about 2450 HV O i.
- the water pressure was 2250 bar
- the pH of the water was 7.3.
- service life increases of the inventively coated focusing nozzles compared to the uncoated reference nozzles in the range of factor 1, 3 to 1, 6 were found.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Vapour Deposition (AREA)
- Coating Apparatus (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05769987T PL1796875T3 (pl) | 2004-08-16 | 2005-08-09 | Dysza ogniskująca |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0059104U AT7925U1 (de) | 2004-08-16 | 2004-08-16 | Fokussierdüse |
PCT/AT2005/000320 WO2006017873A1 (de) | 2004-08-16 | 2005-08-09 | Fokussierdüse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1796875A1 true EP1796875A1 (de) | 2007-06-20 |
EP1796875B1 EP1796875B1 (de) | 2008-07-23 |
Family
ID=34916765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05769987A Not-in-force EP1796875B1 (de) | 2004-08-16 | 2005-08-09 | Fokussierdüse |
Country Status (10)
Country | Link |
---|---|
US (1) | US20070161341A1 (de) |
EP (1) | EP1796875B1 (de) |
AT (2) | AT7925U1 (de) |
CA (1) | CA2577151C (de) |
DE (1) | DE502005004834D1 (de) |
DK (1) | DK1796875T3 (de) |
ES (1) | ES2307199T3 (de) |
MX (1) | MX2007001816A (de) |
PL (1) | PL1796875T3 (de) |
WO (1) | WO2006017873A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7832481B2 (en) * | 2008-08-20 | 2010-11-16 | Martindale James G | Fluid perforating/cutting nozzle |
US20100088894A1 (en) * | 2008-10-10 | 2010-04-15 | Stark Roger M | Method for preparing abrasive waterjet mixing tubes |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2090371A1 (en) * | 1992-03-27 | 1993-09-28 | William Frank Banholzer | Water jet mixing tubes used in water jet cutting devices and method of preparation thereof |
US5626508A (en) * | 1995-04-20 | 1997-05-06 | Aqua-Dyne, Inc. | Focusing nozzle |
DE19640920C1 (de) * | 1996-10-04 | 1998-01-22 | Saechsische Werkzeug Und Sonde | Fokussierdüse für das Abrasivwasserstrahlschneiden |
US6425805B1 (en) * | 1999-05-21 | 2002-07-30 | Kennametal Pc Inc. | Superhard material article of manufacture |
US6752685B2 (en) * | 2001-04-11 | 2004-06-22 | Lai East Laser Applications, Inc. | Adaptive nozzle system for high-energy abrasive stream cutting |
-
2004
- 2004-08-16 AT AT0059104U patent/AT7925U1/de not_active IP Right Cessation
-
2005
- 2005-08-09 DK DK05769987T patent/DK1796875T3/da active
- 2005-08-09 PL PL05769987T patent/PL1796875T3/pl unknown
- 2005-08-09 ES ES05769987T patent/ES2307199T3/es active Active
- 2005-08-09 DE DE502005004834T patent/DE502005004834D1/de active Active
- 2005-08-09 MX MX2007001816A patent/MX2007001816A/es active IP Right Grant
- 2005-08-09 WO PCT/AT2005/000320 patent/WO2006017873A1/de active IP Right Grant
- 2005-08-09 CA CA2577151A patent/CA2577151C/en not_active Expired - Fee Related
- 2005-08-09 AT AT05769987T patent/ATE401992T1/de active
- 2005-08-09 EP EP05769987A patent/EP1796875B1/de not_active Not-in-force
-
2007
- 2007-02-16 US US11/707,784 patent/US20070161341A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2006017873A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1796875B1 (de) | 2008-07-23 |
CA2577151A1 (en) | 2006-02-23 |
DK1796875T3 (da) | 2008-11-17 |
ES2307199T3 (es) | 2008-11-16 |
US20070161341A1 (en) | 2007-07-12 |
CA2577151C (en) | 2013-01-22 |
ATE401992T1 (de) | 2008-08-15 |
WO2006017873A1 (de) | 2006-02-23 |
PL1796875T3 (pl) | 2009-01-30 |
MX2007001816A (es) | 2007-04-26 |
DE502005004834D1 (de) | 2008-09-04 |
AT7925U1 (de) | 2005-11-15 |
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