WO2005118208A1 - Gasgemisch zum laserstrahlschmelzschneiden - Google Patents
Gasgemisch zum laserstrahlschmelzschneiden Download PDFInfo
- Publication number
- WO2005118208A1 WO2005118208A1 PCT/EP2005/005503 EP2005005503W WO2005118208A1 WO 2005118208 A1 WO2005118208 A1 WO 2005118208A1 EP 2005005503 W EP2005005503 W EP 2005005503W WO 2005118208 A1 WO2005118208 A1 WO 2005118208A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- gas mixture
- gas
- laser
- nitrogen
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
- B23K26/125—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases of mixed gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
Definitions
- the invention relates to a gas mixture for laser beam fusion cutting.
- the invention further relates to a method for laser beam fusion cutting of materials, wherein a focused laser beam onto the one to be processed
- Workpiece surface is guided and a cutting gas stream is directed against the workpiece surface via at least one nozzle.
- the laser processing systems are known per se. As a rule, they have a laser processing head, optionally with a nozzle arranged coaxially with the laser beam. Laser processing systems are often used in connection with CNC controls of guiding machines for the x-y cutting direction. Handling systems for three-dimensional workpieces are increasingly being used in laser beam cutting.
- An automatic cutting parameter assignment (laser power adapted to the respective cutting speed during the cutting process) based on the contour shape to be cut is generally a prerequisite for good cutting quality even at sharp corners and acute angles.
- Laser cutting is the most commonly used laser processing method worldwide. For example, in Germany over 80% of laser processing systems are used for cutting. With laser beam cutting, there is a distinction between laser beam flame cutting (with oxygen), laser beam fusion cutting (with inert gas or nitrogen) and reactive laser beam cutting (with reactive gases such as hydrogen and oxygen, which bring energy to the workplace through the detonating gas reaction). Such methods and gas mixtures are known, for example, from DE 100 64 327 A1 or DE 693 17 313 T2. With laser beam fusion cutting, the material is melted by the laser radiation in the separation spot. The melt is driven out of the kerf with a cutting gas. Laser beam fusion cutting with cutting gas under high pressure has established itself in the cutting of stainless steels, but is also sometimes used for other materials such as structural steel or aluminum. As
- Cutting gas for laser beam fusion cutting is usually an inert gas such as nitrogen in particular.
- Nitrogen is used in the laser beam fusion cutting of metals, in particular when cutting chromium-nickel steels, whereby this gas should have the greatest possible freedom from oxygen in order to avoid oxidation of the cut surfaces.
- nitrogen of high purity less than 1% oxygen
- highest purity less than 0.1% O 2
- gases of this purity are generated by cryogenic air separation, since PSA or VSA (Pressure Swing
- Adsorption vacuum swing adsorption, adsorptive separations of air in nitrogen and oxygen
- nitrogen products in the production of nitrogen, which have a higher O 2 content.
- Adsorption systems can also produce gases of higher purity, but then the production rate (m 3 / h) drops drastically.
- the object of the invention is to propose a gas mixture for laser beam fusion cutting which is cheaper than nitrogen of high purity and which offers the same cutting speeds and cutting qualities as nitrogen of high purity.
- an impure starting product is used instead of high-purity nitrogen, which originates, for example, from a VSA plant, an adsorption plant, a PSA plant, an on-site plant, a membrane separation plant or another air separation plant, which is typically 91-96% nitrogen, approx . containing 1 '% argon and about 2-6% oxygen.
- a gas can be produced very inexpensively.
- a small amount of hydrogen is added according to the invention, which apparently reduces the remaining oxygen and makes it harmless. Adding small amounts of hydrogen to the cutting gas with approx. 3% oxygen results in the same oxide-free cut in the kerf as when using nitrogen with 0.1% oxygen.
- With thin sheet metal which hardly gets hot when cutting and therefore hardly scales, only a little hydrogen has to be added. For sheet thicknesses over 3 mm, a higher hydrogen addition will be necessary.
- the addition of hydrogen can correspond to the oxygen content of the starting gas or be higher (for example up to 12% if 6% oxygen is allowed). This would be a stoichiometric addition of hydrogen.
- overstoichiometric H 2 commitments were successful, i.e. more than twice as much H 2 as O 2 .
- the invention allows a high quality and reproducible cutting with increased cutting speed.
- Laser beam fusion cutting according to the invention has proven to be reliable.
- the invention also leads to an improvement in piercing during laser beam fusion cutting.
- the invention does not require any modifications to existing laser devices and fittings.
- the invention can be used in connection with all types of lasers. Above all, it is suitable for use in laser processing with Nd-YAG lasers, diode lasers and C0 2 lasers.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/596,632 US20080264912A1 (en) | 2004-05-27 | 2005-05-20 | Gas Mixture For Laser Beam Fusion Cutting |
| AU2005249668A AU2005249668B2 (en) | 2004-05-27 | 2005-05-20 | Gas mixture for laser-beam fusion cutting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004026033A DE102004026033A1 (de) | 2004-05-27 | 2004-05-27 | Gasgemisch zum Laserstrahlschmelzschneiden |
| DE102004026033.8 | 2004-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005118208A1 true WO2005118208A1 (de) | 2005-12-15 |
Family
ID=34968605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2005/005503 Ceased WO2005118208A1 (de) | 2004-05-27 | 2005-05-20 | Gasgemisch zum laserstrahlschmelzschneiden |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20080264912A1 (de) |
| AU (1) | AU2005249668B2 (de) |
| DE (1) | DE102004026033A1 (de) |
| WO (1) | WO2005118208A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007043311B4 (de) * | 2007-09-12 | 2010-02-25 | Trovotech Gmbh | Zusammensetzung mit antimikrobieller Wirkung, Verfahren zu deren Herstellung und deren Verwendung |
| ITPI20110060A1 (it) * | 2011-06-01 | 2012-12-02 | Angelo Claudio D | Un gas di processo per effettuare tagli utilizzando la tecnologia laser. |
| JP6238185B2 (ja) * | 2016-05-18 | 2017-11-29 | 株式会社アマダホールディングス | めっき鋼板のレーザ切断加工方法、レーザ切断加工品、熱切断加工方法、熱切断加工製品、表面処理鋼板及びレーザ切断方法並びにレーザ加工ヘッド |
| KR102843519B1 (ko) * | 2022-11-23 | 2025-08-06 | 이상훈 | 휴대형 산소발생기 기반 소형 산소절단기 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0230389A (ja) * | 1988-07-20 | 1990-01-31 | Komatsu Ltd | レーザ切断方法 |
| FR2639251A1 (fr) * | 1988-11-24 | 1990-05-25 | Air Liquide | Procede d'elaboration d'une atmosphere de traitement thermique par separation d'air par adsorption et sechage |
| WO1996023624A1 (en) * | 1995-01-31 | 1996-08-08 | Aga Ab (Publ) | A method of cutting by laser and gas composition for use in such cutting |
| DE10064327A1 (de) * | 2000-12-22 | 2002-06-27 | Linde Ag | Schneidgasgemisch und Verfahren zum Laserstrahlschmelzschneiden |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1298851B (de) * | 1963-12-02 | 1969-07-03 | Steigerwald | Verfahren zur Materialbearbeitung mittels Strahlungsenergie |
| US3939323A (en) * | 1972-09-14 | 1976-02-17 | Union Carbide Corporation | Shielding gas for laser welding |
| US3976592A (en) * | 1973-03-23 | 1976-08-24 | The United States Of America As Represented By The United States Energy Research And Development Administration | Production of MHD fluid |
| US4105889A (en) * | 1974-07-30 | 1978-08-08 | Owens-Illinois, Inc. | Laser method of introducing mercury to gas discharge display panels |
| US4381641A (en) * | 1980-06-23 | 1983-05-03 | Gulf Research & Development Company | Substoichiometric combustion of low heating value gases |
| DK168593B1 (da) * | 1985-05-09 | 1994-05-02 | Aga Ab | Fremgangsmåde ved laserskæring af metalliske emner |
| GB2273252B (en) * | 1992-12-09 | 1996-09-18 | Boc Group Plc | The separation of gaseous mixtures |
| US5380976A (en) * | 1992-12-11 | 1995-01-10 | Hypertherm, Inc. | Process for high quality plasma arc and laser cutting of stainless steel and aluminum |
| US5560817A (en) * | 1994-09-30 | 1996-10-01 | The Boc Group, Inc. | Hydrocarbon catalytic cracking process |
| JP3917698B2 (ja) * | 1996-12-12 | 2007-05-23 | 株式会社半導体エネルギー研究所 | レーザーアニール方法およびレーザーアニール装置 |
| FR2772013B1 (fr) * | 1997-12-10 | 2000-01-14 | Air Liquide | Melange gazeux ternaire et application de ce melange a la projection plasma de materiaux refractaires |
| US6376797B1 (en) * | 2000-07-26 | 2002-04-23 | Ase Americas, Inc. | Laser cutting of semiconductor materials |
| FR2816227B1 (fr) * | 2000-11-09 | 2003-01-24 | Air Liquide | Procede de coupage laser a haute vitesse avec gaz adapte |
| EP1343607B1 (de) * | 2000-12-22 | 2007-01-31 | Linde Aktiengesellschaft | Prozessgas und verfahren zum laserbearbeiten |
| DE10162938A1 (de) * | 2001-12-20 | 2003-07-03 | Linde Ag | Verfahren zur Herstellung einer Schutzgasmischung |
-
2004
- 2004-05-27 DE DE102004026033A patent/DE102004026033A1/de not_active Withdrawn
-
2005
- 2005-05-20 US US11/596,632 patent/US20080264912A1/en not_active Abandoned
- 2005-05-20 WO PCT/EP2005/005503 patent/WO2005118208A1/de not_active Ceased
- 2005-05-20 AU AU2005249668A patent/AU2005249668B2/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0230389A (ja) * | 1988-07-20 | 1990-01-31 | Komatsu Ltd | レーザ切断方法 |
| FR2639251A1 (fr) * | 1988-11-24 | 1990-05-25 | Air Liquide | Procede d'elaboration d'une atmosphere de traitement thermique par separation d'air par adsorption et sechage |
| WO1996023624A1 (en) * | 1995-01-31 | 1996-08-08 | Aga Ab (Publ) | A method of cutting by laser and gas composition for use in such cutting |
| DE10064327A1 (de) * | 2000-12-22 | 2002-06-27 | Linde Ag | Schneidgasgemisch und Verfahren zum Laserstrahlschmelzschneiden |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 177 (M - 0960) 9 April 1990 (1990-04-09) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080264912A1 (en) | 2008-10-30 |
| AU2005249668B2 (en) | 2010-11-11 |
| AU2005249668A1 (en) | 2005-12-15 |
| DE102004026033A1 (de) | 2005-12-15 |
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