WO1994004306A1 - Verfahren zum laserstrahlschneiden von band- oder plattenförmigen werkstücken, insbesondere von elektroblech - Google Patents
Verfahren zum laserstrahlschneiden von band- oder plattenförmigen werkstücken, insbesondere von elektroblech Download PDFInfo
- Publication number
- WO1994004306A1 WO1994004306A1 PCT/EP1993/002123 EP9302123W WO9404306A1 WO 1994004306 A1 WO1994004306 A1 WO 1994004306A1 EP 9302123 W EP9302123 W EP 9302123W WO 9404306 A1 WO9404306 A1 WO 9404306A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- laser beam
- melt
- cutting gas
- gas
- Prior art date
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
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
-
- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/144—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing particles, e.g. powder
-
- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
-
- 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
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- 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
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/16—Bands or sheets of indefinite length
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
Definitions
- the invention relates to a method for laser beam cutting of strip or plate-shaped workpieces, in particular of electrical sheet with a thickness of ⁇ 1 mm, in particular ⁇ 0.5 mm, in which a laser beam emanating from a laser beam source forms the material with the formation of a vapor capillary Interface melts and the melt is driven out by an inert cutting gas containing hydrogen.
- the laser beam cutting of metallic workpieces in particular the cutting of stainless steel sheet with a thickness of less than 1 mm, is known from DE 36 19 513 AI.
- the cutting active gas in the inert cutting gas is oxygen. This oxygen contains 30 to 90 vol. Of the cutting gas. It is intended to serve the chemical exothermic reaction with the steel to generate additional thermal energy in order to accelerate the cutting process.
- the oxygen, together with the cutting gas should drive out the melt that arises in the cutting area from the kerf of the sheet.
- the oxidation products are not driven out completely from the kerf, so that no cutting edges substantially free of oxidation products are obtained.
- due to the chemical exothermic reaction a comparatively large heat-affected zone is created to the side of the cutting area, which leads to damage to the workpiece, in particular to a sheet and to the coating which may be located thereon.
- a method for laser beam cutting of the type mentioned at the beginning (DVS reports 135, 1991, pages 12 to 15) which has just become known can be used with optimally coordinated parameters such as beam quality index K, focusing index F and focused intensity with a given laser beam type, preferably a C0 laser, achieve cutting speeds of around 100 m / min with a sheet thickness of 0.25 mm and an Fe alloy as the material. It makes no significant difference whether hydrogen is added to the cutting gas or whether the cutting gas consists primarily of oxygen, because only slightly higher cutting speeds were achieved with oxygen.
- a cutting method is known (DE 39 34 920), in which slots can be cut with a laser beam, the cutting being carried out using an air jet or oxygen jet which is directed at the point of incidence of the laser beam on the pane.
- an air jet or oxygen jet which is directed at the point of incidence of the laser beam on the pane.
- Such a jet consisting of reactive gas, wide slits can be produced and the melt can be driven out of the slit by the compressed gas.
- Such a method differs fundamentally from the method according to the invention that works with an inert cutting gas because of the reactive cutting gas.
- the central axis of the laser beam lies within an inert cutting gas jet directed towards the workpiece and containing hydrogen.
- the cutting gas jet leads to the beam axis of the laser beam in the cutting direction and is directed so that the melt is continuously expelled from the kerf.
- the invention has for its object to improve the method of the type mentioned for given materials and workpiece thicknesses with respect to the maximum achievable cutting speed, without having to accept a reduction in the quality of the cutting edges.
- This object is achieved in that the hydrogen content of the cutting gas is set so high to maintain the steam capillary and the inert cutting gas enveloping the laser beam is supplied to the surface of the melt at the interface with such a pressure and pressure distribution that the steam capillary is closed at the bottom remains, the temperature on the surface of the melt is kept at the evaporation temperature and the melt is continuously expelled from the kerf on the side of the steam capillary facing away from the cutting direction.
- Partial evaporation in connection with modified interaction geometry form a plasma, which can shield the laser radiation, and a vapor capillary.
- the steam capillary is used according to the invention in order to achieve higher cutting speeds. This is because there is a melt flow in the cutting area parallel to the workpiece surface around the steam capillary and a melt discharge behind the steam capillary from the kerf downwards. That alone is enough not enough, because if the process is carried out incorrectly, this can lead to a build-up of the melt, combined with the risk of overheating of the melt and the edge zones of the kerf adjacent to it, and widening of the kerf. These phenomena can lead to the desired increases in speed not being achieved, or at least to a considerable extent not being achieved.
- burr-free cut edges and the least possible influence on the zones of the material to be separated adjacent to the cut edges are achieved with cutting speeds which are further increased compared to the prior art. which is particularly important for grain-oriented electrical sheet.
- Suitable pressures for the inert cutting gas in a CO laser are between 3 bar and 8 bar.
- Nd: YAG laser it is advantageous to use significantly higher pressures, namely up to 50 bar.
- nitrogen or argon be used as the inert cutting gas. These are industrially available inexpensive gases. While nitrogen is generally particularly suitable for workpieces made of ferrous metals, argon can show advantageous inert behavior, especially in the case of non-ferrous metals.
- the laser beam is focused on an oval focal spot with the main axis running in the cutting direction. This reduces the intensity of the laser radiation in relation to the cutting front and thus prevents undesired strong evaporation of the material with a correspondingly high level of plasma formation. Furthermore, the high cutting speed is beneficial if the focused focal spot of the laser beam is held halfway up the workpiece, in the middle of the workpiece thickness.
- the inert is inert
- Cutting gas is guided eccentrically to the laser beam axis and hits the interface in advance. It is also advantageous if the inert cutting gas hits the interface at an angle ⁇ 90.
- Embodiments have in common that the pressure center of the inert cutting gas is moved to the uncut workpiece. As a result of this setting, the pressure center of the inert cutting gas is moved to the uncut workpiece.
- a transverse pressure gradient occurs when the gas jet enters the kerf. This requires one
- laser radiation of a low mode order is selected, i.e. the largest possible beam quality index K of preferably> 0.5.
- an additional gaseous, liquid or particle jet can be used.
- Fig. 1 is a laser beam cutting device in a perspective, schematic representation
- Fig. 2 shows a longitudinal section through the cutting area of a workpiece of thickness d.
- Fig. 2 shows a longitudinal section through the cutting area of a workpiece of thickness d.
- a cutting device 25 with a laser beam 21 is guided over a workpiece 10, the
- Laser radiation 11 is focused with a focusing optics 12.
- the focused laser radiation 11 is directed onto the workpiece 10 shown as sheet metal, which has a thickness d.
- the laser beam 11 creates a kerf 16 in the sheet.
- the cutting speeds are, for example, for sheets of less than 1 mm up to 250 m / min and more.
- the cutting device 25 can be used, for example, in longitudinal and / or cross-cutting systems and in trimming systems, where the sheet is unwound from the coil, for example.
- the focusing optics 12 has a focusing lens with which the laser radiation 11 is focused so that the focus is in the range of half the sheet thickness d, cf. Fig. 2.
- the focus should be as strong as possible, so the focus should be as small as possible. This can include can be achieved in that the laser radiation has the lowest possible mode order.
- the laser beam 21 is surrounded by a gas nozzle 13 for the cutting gas 14.
- the cutting gas 14 strikes the cutting area 20 of the sheet 10 in the direction of the laser radiation 11. It consists of an inert gas, such as nitrogen or argon, which primarily serves to expel the melt 15 which is generated by the laser radiation 11 during cutting. Hydrogen is also added to the cutting gas, the effect of which is described below.
- FIG. 2 further shows that, in the method according to the invention, the cut front 23 is substantially flatter, namely at an angle
- Cutting front 23 is explained in the case of thin sheets with the high ratio of focus diameter d and sheet thickness f d, in spite of the greater beam intensity or the stronger focusing.
- Convention cutting of, for example, 3 mm thick sheets with a focus diameter d 3/10 mm, this results in a relation to the sheet thickness d
- a higher beam intensity due to a stronger focus on, for example, 6/100 mm this results in a sheet thickness of 0.2 mm
- Ratio of 3:10 so that the cutting front must be flatter at maximum cutting speed in order to couple the laser beam completely. That means a larger interaction area.
- there is a comparatively large blockage of the melt since a high volume flow is given due to the high cutting speed and the maximum speed of the
- Direction of arrows 24 in FIG. 2 is a reinforced one Evaporation of the sheet material.
- the flow rate of the melt 15 is reduced when it is driven out, and the metal evaporation rate increases, so that a shielding metal vapor plasma can arise at the high laser intensities.
- Both are avoided by adding hydrogen to the inert cutting gas.
- the hydrogen causes the surface tension of the melt to be reduced, so that it can be blown out more quickly and thus the melt film thickness, surface temperature and evaporation rate decrease.
- This circumstance is of considerable importance if it is noted that the kerf 16 is narrow and the sheet metal is thin, but the mass flow to be expelled (mass per unit of time) is overall very large due to the high cutting speed.
- the light molecules of the hydrogen cool the plasma and thus counteract the formation of a shielding metal vapor plasma. In addition to increasing the maximum cutting speed, this also increases the stability of the cutting process, which has a correspondingly positive effect on the cutting quality.
- the gas nozzle 13 is also rotationally symmetrical and its axis is designated 17.
- the axis 17 is here a synonym for the pressure center of the cutting gas 14, which is fed to the cutting area 20 as shown in FIG. 1.
- the axis 17 of the gas nozzle 13 with respect to the axis 18 of the laser radiation 11 is arranged with an eccentricity e, namely offset in the direction of the uncut sheet 10.
- e eccentricity
- the resulting metal vapor is influenced so that a shielding effect of the metal vapor plasma can be avoided.
- the melt is removed faster in the direction of the comparatively flat cutting front 23.
- Fig. 2 it can be seen that the achievement of a transverse pressure gradient of the cutting gas can also be achieved in that the gas nozzle 13 is arranged with axes 19 or 19 'inclined to the sheet 10.
- the cutting gas 14 strikes the cut front 23 and / or the uncut sheet 10. 2 shows the laser radiation 11 with a focus of the diameter d.
- the beam cross section is therefore circular.
- the laser radiation 11 can, however, also preferably be focused elliptically or oblong.
- d is the length of the large semi-axis of the ellipse, which is arranged in the cutting direction.
- cutting speeds of more than 100 m / min, preferably up to 250 m / min and more, can be achieved with an oxidation-free cutting edge. Due to the high cutting speed, the disadvantageous heat influence on the edge zones of the kerf is low, which is particularly important for grain-oriented electrical sheets.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94908164A EP0655021B1 (de) | 1992-08-12 | 1993-08-10 | Verfahren zum laserstrahlschneiden von band- oder plattenförmigen werkstücken, insbesondere von elektroblech |
US08/379,665 US5578228A (en) | 1992-08-12 | 1993-08-10 | Process for the laser beam cutting of strip or plate workpieces, especially magnetic steel sheets |
JP50585394A JP3298884B2 (ja) | 1992-08-12 | 1993-08-10 | 帯材または板材、特に電磁鋼板をレーザビームで切断する方法 |
NO19950492A NO310601B1 (no) | 1992-08-12 | 1995-02-09 | Fremgangsmåte for laserstråleskj¶ring av bånd- eller plateformede emner, s¶rlig elektroplater |
FI950599A FI102520B1 (fi) | 1992-08-12 | 1995-02-10 | Menetelmä nauhamaisten tai levymäisten työkappaleiden, erityisesti magneettisten teräslevyjen, leikkaamiseksi lasersäteen avulla |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4226620.3 | 1992-08-12 | ||
DE4226620A DE4226620C2 (de) | 1992-08-12 | 1992-08-12 | Verfahren zum Laserstrahlschneiden von band- oder plattenförmigen Werkstücken, insbesondere von Elektroblech |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994004306A1 true WO1994004306A1 (de) | 1994-03-03 |
Family
ID=6465355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/002123 WO1994004306A1 (de) | 1992-08-12 | 1993-08-10 | Verfahren zum laserstrahlschneiden von band- oder plattenförmigen werkstücken, insbesondere von elektroblech |
Country Status (10)
Country | Link |
---|---|
US (1) | US5578228A (de) |
EP (1) | EP0655021B1 (de) |
JP (1) | JP3298884B2 (de) |
AT (1) | ATE143300T1 (de) |
DE (1) | DE4226620C2 (de) |
DK (1) | DK0655021T3 (de) |
ES (1) | ES2092403T3 (de) |
FI (1) | FI102520B1 (de) |
NO (1) | NO310601B1 (de) |
WO (1) | WO1994004306A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997034730A1 (de) * | 1996-03-15 | 1997-09-25 | Aga Aktiebolag | Verfahren zum laserschneiden metallischer werkstücke |
US5760368A (en) * | 1994-07-08 | 1998-06-02 | Fanuc, Ltd. | Laser beam method using an inactive gas as the assist gas |
EP1238747A1 (de) * | 2001-03-09 | 2002-09-11 | L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude | Laserschneidverfahren und -einrichtung mit einer Bifokaloptik und einem auf Wassestoff basierenden Hilfsgas |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4438118C2 (de) * | 1994-10-26 | 2003-02-13 | Siemens Ag | Zweiwalzen-Gießmaschine |
DE19835849A1 (de) | 1998-08-07 | 2000-02-10 | Basf Coatings Ag | Mit energiereicher Strahlung und/oder thermisch härtbare Pulverlacke mit funktionalisierter Grundstruktur |
FR2803549B1 (fr) * | 2000-01-10 | 2002-03-29 | Air Liquide | Procede et installation de coupage laser d'acier doux ou de construction avec optique multifocale |
FR2816227B1 (fr) * | 2000-11-09 | 2003-01-24 | Air Liquide | Procede de coupage laser a haute vitesse avec gaz adapte |
FR2830478B1 (fr) * | 2001-10-05 | 2003-12-05 | Commissariat Energie Atomique | Dispositif de decoupe laser |
DE10243147B4 (de) * | 2002-09-17 | 2006-03-16 | Siemens Ag | Verfahren zum Einbringen einer Lochkontur in ein Werkstück |
DE102004002504B4 (de) * | 2004-01-17 | 2006-03-23 | Wieland-Werke Ag | Verfahren zum gratfreien Trennen von Halbzeug aus duktilem Material und dessen Verwendung |
FR2893873B1 (fr) * | 2005-11-25 | 2008-12-12 | Air Liquide | Procede de coupage avec un laser a fibre d'acier inoxydable |
DE102008053397B4 (de) * | 2008-05-20 | 2012-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum Schmelzschneiden von Werkstücken mit Laserstrahlung |
DE102008030783B3 (de) | 2008-06-28 | 2009-08-13 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Verfahren zum Laserstrahlschrägschneiden und Laserbearbeitungsmaschine |
CN102186625B (zh) * | 2008-09-17 | 2014-08-06 | 通快激光两合公司 | 用于无切割气体的激光熔化切割的方法 |
EP2332688A1 (de) * | 2009-12-08 | 2011-06-15 | LCD Laser Cut AG | Verfahren zum Herstellen eines magnetisierbaren Körpers |
JP5766423B2 (ja) * | 2010-10-15 | 2015-08-19 | 三菱重工業株式会社 | レーザ切断装置及びレーザ切断方法 |
DE102010049428A1 (de) * | 2010-10-23 | 2012-04-26 | Volkswagen Ag | Laserschneiden eines Elektrobandmaterials |
DE102010063037A1 (de) * | 2010-12-14 | 2012-06-14 | Robert Bosch Gmbh | Verfahren zum Abtragen von Material mittels einer Laserstrahlquelle |
ITPI20110060A1 (it) * | 2011-06-01 | 2012-12-02 | Angelo Claudio D | Un gas di processo per effettuare tagli utilizzando la tecnologia laser. |
DE102015224115B4 (de) * | 2015-12-02 | 2021-04-01 | Avonisys Ag | Laserstrahl-bearbeitungsvorrichtung mit einer einkoppelvorrichtung zum einkoppeln eines fokussierten laserstrahls in einen flüssigkeitsstrahl |
CN106695133B (zh) * | 2016-12-28 | 2018-05-25 | 京磁新材料有限公司 | 钕铁硼磁体的激光切割方法 |
US20230127911A1 (en) * | 2020-04-06 | 2023-04-27 | Jfe Steel Corporation | Electrical steel sheet machining method, motor, and motor core production method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2366910A1 (fr) * | 1976-10-07 | 1978-05-05 | Lasag Ag | Procede et dispositif d'enlevement de matiere, notamment de percage, d'une piece metallique au moyen d'une impulsion de rayonnement laser focalise |
WO1988001553A1 (en) * | 1986-09-01 | 1988-03-10 | Instituttet For Produktudvikling | A nozzle for laser processing |
JPS645692A (en) * | 1987-06-26 | 1989-01-10 | Mitsubishi Electric Corp | Laser cutting method |
JPH0230389A (ja) * | 1988-07-20 | 1990-01-31 | Komatsu Ltd | レーザ切断方法 |
GB2230222A (en) * | 1988-09-01 | 1990-10-17 | Inst Fiz Akademii Nauk Litovsk | Method and device for making filters by laser machining |
EP0440397A2 (de) * | 1990-01-29 | 1991-08-07 | E.I. Du Pont De Nemours And Company | Verfahren zum Laserschneiden von metallischen Platten |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2743544A1 (de) * | 1977-09-28 | 1979-03-29 | Bbc Brown Boveri & Cie | Verfahren zum trennen von elektroblechen |
DE3324920C1 (de) * | 1983-07-09 | 1984-10-11 | Lenz & Dörrenberg, 5000 Köln | Schornstein |
DK168593B1 (da) * | 1985-05-09 | 1994-05-02 | Aga Ab | Fremgangsmåde ved laserskæring af metalliske emner |
JPH0199790A (ja) * | 1987-10-12 | 1989-04-18 | Mitsubishi Electric Corp | ドロスが付着しやすい材料のレーザ切断法 |
US4891077A (en) * | 1988-10-27 | 1990-01-02 | Dana Corporation | Method of making an electromagnetic coupling disc |
DE3925646A1 (de) * | 1989-08-03 | 1991-02-07 | Doerries Scharmann Gmbh | Verfahren und vorrichtung zum formabtragen von werkstoff mittels eines laserstrahls |
DE4123716A1 (de) * | 1991-07-17 | 1993-01-21 | Thyssen Stahl Ag | Vorrichtung zum hochgeschwindigkeitsschneiden duenner bleche mittels laserstrahlung |
-
1992
- 1992-08-12 DE DE4226620A patent/DE4226620C2/de not_active Expired - Fee Related
-
1993
- 1993-08-10 ES ES94908164T patent/ES2092403T3/es not_active Expired - Lifetime
- 1993-08-10 JP JP50585394A patent/JP3298884B2/ja not_active Expired - Fee Related
- 1993-08-10 AT AT94908164T patent/ATE143300T1/de not_active IP Right Cessation
- 1993-08-10 WO PCT/EP1993/002123 patent/WO1994004306A1/de active IP Right Grant
- 1993-08-10 EP EP94908164A patent/EP0655021B1/de not_active Expired - Lifetime
- 1993-08-10 DK DK94908164.0T patent/DK0655021T3/da active
- 1993-08-10 US US08/379,665 patent/US5578228A/en not_active Expired - Fee Related
-
1995
- 1995-02-09 NO NO19950492A patent/NO310601B1/no not_active IP Right Cessation
- 1995-02-10 FI FI950599A patent/FI102520B1/fi active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2366910A1 (fr) * | 1976-10-07 | 1978-05-05 | Lasag Ag | Procede et dispositif d'enlevement de matiere, notamment de percage, d'une piece metallique au moyen d'une impulsion de rayonnement laser focalise |
WO1988001553A1 (en) * | 1986-09-01 | 1988-03-10 | Instituttet For Produktudvikling | A nozzle for laser processing |
JPS645692A (en) * | 1987-06-26 | 1989-01-10 | Mitsubishi Electric Corp | Laser cutting method |
JPH0230389A (ja) * | 1988-07-20 | 1990-01-31 | Komatsu Ltd | レーザ切断方法 |
GB2230222A (en) * | 1988-09-01 | 1990-10-17 | Inst Fiz Akademii Nauk Litovsk | Method and device for making filters by laser machining |
EP0440397A2 (de) * | 1990-01-29 | 1991-08-07 | E.I. Du Pont De Nemours And Company | Verfahren zum Laserschneiden von metallischen Platten |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 13, no. 170 (M - 817) 21 April 1989 (1989-04-21) * |
PATENT ABSTRACTS OF JAPAN vol. 14, no. 177 (M - 960) 9 April 1990 (1990-04-09) * |
VON HARMUT ZEFFERER ET AL.: "Schmelzschneiden von hochlegierten Chrom-Nickel-Stählen mit CO2-Laserstrahlung", VDI ZEITSCHRIFT, vol. 133, no. 6, June 1991 (1991-06-01), DUSSELDORF DE, pages 46 - 56, XP000237544 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5760368A (en) * | 1994-07-08 | 1998-06-02 | Fanuc, Ltd. | Laser beam method using an inactive gas as the assist gas |
WO1997034730A1 (de) * | 1996-03-15 | 1997-09-25 | Aga Aktiebolag | Verfahren zum laserschneiden metallischer werkstücke |
US6060687A (en) * | 1996-03-15 | 2000-05-09 | Aga Aktiebolag | Method of laser cutting metal workpieces |
EP1238747A1 (de) * | 2001-03-09 | 2002-09-11 | L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude | Laserschneidverfahren und -einrichtung mit einer Bifokaloptik und einem auf Wassestoff basierenden Hilfsgas |
FR2821776A1 (fr) * | 2001-03-09 | 2002-09-13 | Air Liquide | Procede et installation de coupage laser avec optique a brifocales et gaz d'assistance a base d'hydrogene |
Also Published As
Publication number | Publication date |
---|---|
US5578228A (en) | 1996-11-26 |
FI102520B (fi) | 1998-12-31 |
FI950599A0 (fi) | 1995-02-10 |
DK0655021T3 (de) | 1997-02-24 |
ATE143300T1 (de) | 1996-10-15 |
NO950492D0 (no) | 1995-02-09 |
DE4226620A1 (de) | 1994-02-17 |
EP0655021A1 (de) | 1995-05-31 |
JPH08500060A (ja) | 1996-01-09 |
NO950492L (no) | 1995-02-09 |
FI102520B1 (fi) | 1998-12-31 |
NO310601B1 (no) | 2001-07-30 |
ES2092403T3 (es) | 1996-11-16 |
JP3298884B2 (ja) | 2002-07-08 |
DE4226620C2 (de) | 1995-01-19 |
FI950599A (fi) | 1995-02-10 |
EP0655021B1 (de) | 1996-09-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0655021B1 (de) | Verfahren zum laserstrahlschneiden von band- oder plattenförmigen werkstücken, insbesondere von elektroblech | |
DE102008053397B4 (de) | Verfahren zum Schmelzschneiden von Werkstücken mit Laserstrahlung | |
EP2205393B1 (de) | Vorrichtung und verfahren zur laserbearbeitung | |
DE102016215019C5 (de) | Verfahren zum Laserschneiden mit optimierter Gasdynamik | |
EP0189806A1 (de) | Verfahren zum Stumpfschweissen von mindestens einseitig verzinkten, insbesondere tiefziehfähigen Stahlblechen oder Stahlbändern | |
DE3619513A1 (de) | Verfahren zum laserschneiden metallischer werkstuecke | |
EP0458180B1 (de) | Verfahren und Vorrichtung zum Laserstrahlschneiden | |
DE4123716A1 (de) | Vorrichtung zum hochgeschwindigkeitsschneiden duenner bleche mittels laserstrahlung | |
DE2647082A1 (de) | Laserschweissen | |
EP0886555A1 (de) | Verfahren zum laserschneiden metallischer werkstücke | |
EP1175955A2 (de) | Verfahren und Vorrichtung zu Schweissnahtglättung beim Strahlschweissen | |
EP1601491B2 (de) | Verfahren zum laserstrahlschweissen | |
DE2211195A1 (de) | Verfahren und Vorrichtung zur Materialschweißung | |
EP1590123B1 (de) | Verfahren zum laserstrahlschweissen | |
DE3121555C2 (de) | Verfahren zum Bearbeiten von Stahl mittels Laserstrahlung | |
DE19616844B4 (de) | Verfahren zum Laserbeschichten sowie zum Laserschweißen von metallischen Werkstücken | |
EP1343607B1 (de) | Prozessgas und verfahren zum laserbearbeiten | |
WO2002070192A1 (de) | LASERSCHWEIssEN VON NICHTEISENMETALLEN MITTELS LASERDIODEN UNTER PROZESSGAS | |
AT401245B (de) | Verfahren und vorrichtung zum schneiden mittels eines laserstrahles | |
EP2018926A1 (de) | Verfahren zum thermischen Schneiden mit Veränderung der Zusammensetzung des Schneidgases während des Schneidvorgangs | |
DE3702451C2 (de) | ||
EP2777863A1 (de) | Verfahren, Vorrichtung und Verwendung einer Gaszusammensetzung zum Laserbrennschneiden | |
EP1016492A2 (de) | Bearbeiten von Werkstücken unter Prozess- und Schutzgas | |
WO2019011480A1 (de) | Laserschweissen bei reduziertem umgebungsdruck | |
DE4006167C1 (en) | Steel pipes mfr. - by forming strip into slit tube and welding tube with sides of slit pressed together |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): FI JP NO US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1994908164 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 950599 Country of ref document: FI |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08379665 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1994908164 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1994908164 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 950599 Country of ref document: FI |