WO1984002868A1 - A cutting head for processing by means of a laser beam - Google Patents
A cutting head for processing by means of a laser beam Download PDFInfo
- Publication number
- WO1984002868A1 WO1984002868A1 PCT/DK1984/000003 DK8400003W WO8402868A1 WO 1984002868 A1 WO1984002868 A1 WO 1984002868A1 DK 8400003 W DK8400003 W DK 8400003W WO 8402868 A1 WO8402868 A1 WO 8402868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- laser beam
- pressure
- nozzle
- cutting
- 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
- B23K26/36—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
- B23K26/14—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
- B23K26/1435—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 involving specially adapted flow control means
- B23K26/1436—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 involving specially adapted flow control means for pressure control
-
- 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
- B23K26/1462—Nozzles; Features related to nozzles
- B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
- B23K26/1476—Features inside the nozzle for feeding the fluid stream through the nozzle
Definitions
- the invention relates to a cutting head for processing such as cutting a material by means of a laser beam di ⁇ rected to a pressure chamber ending in a nozzle and which through a pipe connected thereto is capable of receiving pressure gas for blowing out the gas through the nozzle, said pressure gas furthermore being directed to the back of the beam-focussing unit or units.
- a cutting head of this type is known for instance from British patent application No. 2,064,399, whereby pressure gas is fed to a chamber bounded by a focussing lense and a nozzle. As a result a blowing out of gas at the cutting spot is produced which improves the quality of the cut ⁇ ting.
- this known lense limits the pressure with ⁇ ing the chamber.
- the object of the present invention is to provide a cut ⁇ ting head permitting an increasing of the pressure in the laser cutting head
- the cutting head according to the invention is characterised in that a feeding of pressure gas of a relatively high pressure both to the front and the back of the beam-focussing unit or units in the cham ⁇ ber is permitted by the laser beam directed to the pres ⁇ sure chamber being focussed in a small opening to the pressure chamber.
- the beam-focussing unit no longer limits the pressure within the chamber.
- OMH lense system focussing in a focal point immediately out ⁇ side the nozzle.
- the focussing unit may be formed by one or more concave reflectors, at least one of said refle ⁇ - tors being situated within the pressure chamber.
- the part of the chamber situated behind the focussing unit may advantageously comprise a light transmission opening which is narrow compared to the opening of the nozzle. In this manner the laser beam source does not "see" the object.
- Fig. 1 illustrates a cutting head according to the inven ⁇ tion which includes a lense nozzle system
- Fig. 2 illustrates a cutting head comprising a nozzle system with reflecting focussing units.
- the cutting head illustrated in Fig. 1 for cutting a mate ⁇ rial comprises a lense 2 focussing the laser beam 1, which is thereby concentrated in a focal point 3. Through this focal point, the laser beam enters a pressure chamber 4. Subsequently, the laser beam 1 is re-spread until it meets a lense system 5 including one or more lenses.
- This opti ⁇ cal system focusses the laser beam 1 in another focal point immediately outside the pressure chamber, said laser beam leaving said chamber through a nozzle 6.
- OMPf argon or usual atmospheric air is fed to the pressure chamber 4 through a gas pipe 7.
- the focussed laser beam is suitable for processing immediately below the nozzle 6, e.g. for cutting a metal plate whereby the plate is displaced relative to the nozzle 6 perpendicular to the spreading direction of the laser beam and the gas beam.
- the feeding of gas both to the front and to the back of the focussing lense system 5 is for instance carried out through a branching, an adjustment device optionally be- ing provided in at least one of the branch pipes.
- the pressure in the chamber 4, is for instance 25 atm.
- a particular advantage of such avery high pressure is that a better cutting quality than previously is thereby achieved, at the same time as the cutting can be carried out at a higher velocity since the blowing out of " gas re-. moves melting drops and metal vapours, if any.
- a certain regulation of pressure may optionally exist so as to reduce the differential pressure between the front and the back of the lense 5.
- Two different gases may op- tionally be used.
- concave reflectors 8, 9 may be used as focussing units, whereby the loss in effect of the lenses is avoided.
- Fig. 2 illustrates a cutting head comprising two concave reflectors of suitable focal lengths.
- the laser beam 1 is here' focussed by the concave reflector 8 through an open ⁇ ing 10 of the pressure chamber and enters said pressure chamber 4.
- the concave reflector 9 focus- ses the diverging laser beam which subsequently leaves the pressure chamber 4 through the nozzle 6.
- pressure gas is also fed through a gas inlet 7, and the focussed laser beam and the gas beam coaxial therewith are appli- cable for processing such as cutting an article.
- the opening of the nozzle 6 is preferably significantly greater than the distance to the article, since a laminar gas flow is thereby prod ⁇ ced in the cutting area whereby refracting effects of shock waves and turbulent flows, if any, are avoided.
- the po ⁇ larisation is of great importance since the refraction de ⁇ pends on the polarisation.
- the E-vector of the laser beam In order to obtain the highest possible cutting capacity, the E-vector of the laser beam must be parallel to the cutting direction. In order to ob ⁇ tain a uniform cutting circularly polarised light can ad ⁇ vantageously be used.
- the laser used is typically a CO-, laser radiating infra ⁇ red light.
- the effect of the laser is typically about 200 - 5000 w. • .
- the present cutting velocities in a 2 mm thick steel plate are about 5 m/min, which apparently corresponds to only about 15% of the theoretical maximum.
- the notch width may apparently be reduced to about 0.1 mm.
- the cutting head according to the invention renders it possible to cut at a far higher velocity than previously.
- the light trans ⁇ mission opening of the chamber may optionally be made narrower than the opening of the nozzle. Other measures may, however, also be employed.
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 (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU24150/84A AU2415084A (en) | 1983-01-19 | 1984-01-12 | A cutting headfor processing by means of a laser beam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK19683A DK149266C (en) | 1983-01-19 | 1983-01-19 | CUTTING HEAD FOR WORKING WITH A LASER RADIATION |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1984002868A1 true WO1984002868A1 (en) | 1984-08-02 |
Family
ID=8090846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1984/000003 WO1984002868A1 (en) | 1983-01-19 | 1984-01-12 | A cutting head for processing by means of a laser beam |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0134791A1 (en) |
JP (1) | JPS60500488A (en) |
AU (1) | AU2415084A (en) |
DK (1) | DK149266C (en) |
WO (1) | WO1984002868A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2638497A1 (en) * | 1988-10-27 | 1990-05-04 | Dana Corp | METHOD FOR PRODUCING AN ELECTROMAGNETIC COUPLING DISC |
US5237150A (en) * | 1990-01-19 | 1993-08-17 | Fanuc Ltd. | Method of cutting workpiece with laser beam |
GB2309189A (en) * | 1995-02-28 | 1997-07-23 | Mitsubishi Electric Corp | Laser beam machines |
US5660748A (en) * | 1995-02-28 | 1997-08-26 | Mitsubishi Denki Kabushiki Kaisha | Laser beam machine with an optical fiber cable |
DE19825253C1 (en) * | 1998-06-05 | 2000-01-27 | Rofin Sinar Laser Gmbh | Laser processing head for processing work piece with high power laser beam substantially prevents power dependent focal position displacement, allows delivery of process gas |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3696230A (en) * | 1970-01-19 | 1972-10-03 | Hughes Aircraft Co | Laser lens cooling and cleaning system |
US4048464A (en) * | 1975-08-22 | 1977-09-13 | Fuji Photo Film Co., Ltd. | Method of and means for cutting hose for high pressure hydraulic systems |
JPS5756189A (en) * | 1980-09-20 | 1982-04-03 | Toshiharu Nagahaka | Detector for heating point of light beam working device |
-
1983
- 1983-01-19 DK DK19683A patent/DK149266C/en not_active IP Right Cessation
-
1984
- 1984-01-12 JP JP59500484A patent/JPS60500488A/en active Pending
- 1984-01-12 EP EP84900388A patent/EP0134791A1/en not_active Withdrawn
- 1984-01-12 WO PCT/DK1984/000003 patent/WO1984002868A1/en not_active Application Discontinuation
- 1984-01-12 AU AU24150/84A patent/AU2415084A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3696230A (en) * | 1970-01-19 | 1972-10-03 | Hughes Aircraft Co | Laser lens cooling and cleaning system |
US4048464A (en) * | 1975-08-22 | 1977-09-13 | Fuji Photo Film Co., Ltd. | Method of and means for cutting hose for high pressure hydraulic systems |
JPS5756189A (en) * | 1980-09-20 | 1982-04-03 | Toshiharu Nagahaka | Detector for heating point of light beam working device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2638497A1 (en) * | 1988-10-27 | 1990-05-04 | Dana Corp | METHOD FOR PRODUCING AN ELECTROMAGNETIC COUPLING DISC |
US5237150A (en) * | 1990-01-19 | 1993-08-17 | Fanuc Ltd. | Method of cutting workpiece with laser beam |
GB2309189A (en) * | 1995-02-28 | 1997-07-23 | Mitsubishi Electric Corp | Laser beam machines |
US5660748A (en) * | 1995-02-28 | 1997-08-26 | Mitsubishi Denki Kabushiki Kaisha | Laser beam machine with an optical fiber cable |
GB2309189B (en) * | 1995-02-28 | 1997-09-17 | Mitsubishi Electric Corp | Laser beam machines |
GB2298607B (en) * | 1995-02-28 | 1997-09-17 | Mitsubishi Electric Corp | Laser beam machines |
DE19825253C1 (en) * | 1998-06-05 | 2000-01-27 | Rofin Sinar Laser Gmbh | Laser processing head for processing work piece with high power laser beam substantially prevents power dependent focal position displacement, allows delivery of process gas |
Also Published As
Publication number | Publication date |
---|---|
EP0134791A1 (en) | 1985-03-27 |
DK19683D0 (en) | 1983-01-19 |
DK149266C (en) | 1986-11-03 |
JPS60500488A (en) | 1985-04-11 |
DK19683A (en) | 1984-07-20 |
DK149266B (en) | 1986-04-14 |
AU2415084A (en) | 1984-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11673212B2 (en) | Optical path/beam splitting unit and coaxial-wire-feed cladding head thereof | |
US5633967A (en) | Waveguide fiber optical coupler | |
JP2004348137A (en) | Condensing optical component for laser cutting | |
KR20110014596A (en) | Laser scoring with curved trajectory | |
US4054364A (en) | Apparatus for transmitting light through Cassegrain optics | |
US4192573A (en) | Variable power attenuator for light beams | |
WO1984002868A1 (en) | A cutting head for processing by means of a laser beam | |
JP2000005892A (en) | Laser processing | |
CN111201464B (en) | Laser welding method and laser processing device | |
JPS5840532A (en) | Light emitter | |
CN107052570A (en) | A kind of laser precision machining device | |
CN110359042A (en) | A kind of anti-anti- material laser cladding head of height | |
JP2670857B2 (en) | Laser processing equipment | |
WO1989005208A1 (en) | An optical system for laser marking | |
CN116240540A (en) | Composite laser cladding light path | |
CN114012248A (en) | Light path system of laser cutting head | |
CN112099241B (en) | Beam collimation system and method and laser radar | |
CN100428654C (en) | Free space optical communication system | |
CN217238509U (en) | Quasi-optical system for terahertz waves | |
RU2121912C1 (en) | Apparatus for emitting gas streams at laser cutting | |
JPH1190665A (en) | Laser beam machining device | |
GB2261296A (en) | Dual wavelength laser beam delivery system | |
RU2760443C1 (en) | Focusing apparatus for laser processing | |
CN115502563B (en) | Laser additive processing system | |
CN109273864B (en) | Device for generating millimeter wave Bessel wave beam by using double-fed source |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AT AU BR CH DE FI GB JP NL NO SE SU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1984900388 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1984900388 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1984900388 Country of ref document: EP |