CN104139242A - Strip steel laser cutting head - Google Patents
Strip steel laser cutting head Download PDFInfo
- Publication number
- CN104139242A CN104139242A CN201310169941.3A CN201310169941A CN104139242A CN 104139242 A CN104139242 A CN 104139242A CN 201310169941 A CN201310169941 A CN 201310169941A CN 104139242 A CN104139242 A CN 104139242A
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- Prior art keywords
- cutting head
- laser
- jet
- head body
- laser via
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Classifications
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the field of laser cutting, particularly to a high-speed strip steel laser cutting head. The strip steel laser cutting head comprises a cutting head body, the axial center of the cutting head body is provided with a laser passage, and a ring-shaped air spray cavity is formed inside the cutting head body and around the laser passage; the side wall of the cutting head body is provided with a pressure maintaining air inlet hole and a jetting air inlet channel, wherein the pressure maintaining air inlet hole is communicated with the laser passage, and the jetting air inlet channel is communicated with the air spray cavity; the bottom of the cutting head body is provided with an air spray structure communicated with the air spray cavity, the air spray structure is centrally-symmetric around the axis of the laser passage, and the vertical cross section of the air spray structure is composed of a retracting cavity, a neck component and a diffusing cavity from the top to the bottom. According to the strip steel laser cutting head, an air spray purging and the laser passage are separated, and no cutting dust entering the laser passage is guaranteed through the wall attachment effect, so that the cleanliness of the laser passage can be ensured, and the beam quality can be improved, the service life of associated optical elements can be prolonged.
Description
Technical field
The present invention relates to laser cutting field, relate in particular to a kind of laser cutting head of laser high-speed cutting belt steel.
Background technology
From last century the seventies, laser cutting application in enterprise produces gradually.The advantage of laser cutting is: 1. laser cutting is non-contact optical hot-working, is described as " never wornout multipurpose instrument (tool) ".Workpiece can carry out the tight discharge of arbitrary form or cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing, and raw material are fully used.Owing to being noncontact processing, the part after processing is without any deformation.2. the efficiency of laser cutting is high.High efficiency makes single-piece work cost become geometric progression to reduce, even lower than traditional diamond-making technique.3, laser cutting is without cutter and mould.Under computer control, can directly realize the plate class of arbitrary shape in two dimension, three-dimensional and the processing of the flexibility of shell part, be specially adapted to the processing of the metal plate parts of many kinds, the small lot of new product development development phase, can save Design of Dies, manufacturing expenses that expense is very high, greatly shorten the production cycle.4. the joint-cutting of laser cutting is minimum.Joint-cutting is generally at 0.15～0.4mm.Utilize laser to cutting high rigidity, high fragility, dystectic material, the just advantage of laser cutting.
In laser cutting, air-flow has blowing melted material, protects condenser lens that the effect of part ablation energy is even provided.Gas pressure, flow are the key factors that affects cut quality, and hypotony can not be blown the melted material of incision; Too high, easily form eddy current at surface of the work, weaken on the contrary the effect that air-flow is removed melted material.Facts have proved, the nozzle of different structure also can produce different impacts to cutting.
At present both at home and abroad for laser cutting nozzle, especially high-rate laser cutting is little with the research of nozzle, its form of nozzle is mainly taking single hole as main, and medium is taking gas as main, and its shortcoming is mainly that cannot under the prerequisite that ensures gas pressure, provide cooling removes required gas flow with slag.Patent CN200510095474.X, according to Lavalle architectural characteristic, adopts Fu Er intellectual line approximating method, and owing to adopting straight line and luminance curve combination in divergent section, not only difficulty of processing is large, and cannot ensure the stationarity of air-flow.Patent CN101104222A has provided a kind of superonic flow nozzzle, forms the entirety that communicates by four parts such as parallel-segment, converging portion, throat and divergent section, and its converging portion and divergent section are complex curve, and to nozzle, processing increases great difficulty for this.Patent CN101508059A provides a kind of nozzle being made up of cutting head main body, water trap and return slag device, it is advantageous that nozzle is split type, and return slag mouth is set simultaneously, can improve the spatter property of nozzle machining accuracy and laser via.These laser cutting designs of nozzles are all to need to ensure that gas nozzle center strictly overlaps with laser center above, otherwise will obviously reduce cutting speed and cut quality.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of for the laser cutting head with steel, by jet purge passage is separated with laser via, has ensured the spatter property of laser via, can improve beam quality, extends the relevant optical life-span.
The present invention is achieved in that a kind of for the laser cutting head with steel, comprise cutting head body, the axle center of described cutting head body is provided with laser via, in described cutting head body, offer the jet cavity volume of a ring shape around laser via, on cutting head body sidewall, offer pressurize air admission hole and spray air intake duct, described pressurize air admission hole is communicated with laser via, and described injection air intake duct is communicated with jet cavity volume; Cutting head body bottom offers the jet structure being communicated with jet cavity volume, and jet structure is around the axle center of laser via Central Symmetry, and the vertical cross-section of described jet structure is from top to bottom by contraction chamber, throat with disperse chamber three parts and form.
Described contraction chamber is taper.
The outer wall that described laser via is positioned at jet structure outlet below is curved surface air-guide section.
The volume of described jet cavity volume is greater than the volume of jet structure.
Described cutting head body is made up of superstructure and substructure two parts, described laser via becomes as a whole with superstructure, described substructure is enclosed within outside laser via, substructure is sealedly and fixedly connected on the lower surface of superstructure, between superstructure and substructure, is provided with sealing ring.
Described jet structure is a ring jet cavity, and ring jet cavity is coaxial with laser via, the outer wall that the inwall of ring jet cavity is laser via, the inwall that the outer wall of ring jet cavity is substructure.
Described jet structure is made up of some fumaroles that are opened in substructure, and some fumaroles are annular array centered by the axle center of laser via.
The present invention adopts split-type design for the laser cutting head with steel in order conveniently to process, realize combined nozzle design, be decomposed into three relatively independent machined surfaces by nozzle and cavity volume thereof, effectively simplify the difficulty of processing of nozzle segment, thereby improved feasibility and the machining accuracy of Machining of Curved Surface.
Jet structure is the nozzle cavity of continuous curve surface composition, make to spray fluid and obtain supersonic speed through compression and expansion process, polymerizable fluid point overlaps with laser spot simultaneously, by the symmetrical nozzle arrangements of annular center, can under the harm prerequisite such as flow field shock wave and eddy current that does not increase fluid, greatly increase jet amount; Jet purge passage separates with laser via, in laser via, only pass into the low-pressure air current of avoiding laser via to produce negative pressure, utilize the jet structure of similar Rafael nozzle to realize fluid supersonic velocity, and ensure that by wall attachment effect cutting dust cannot enter laser via, ensure the spatter property of laser via, can improve beam quality, extend the relevant optical life-span.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention for the laser cutting head embodiment 1 with steel;
Fig. 2 is the schematic cross-section of jet structure in the present invention;
Fig. 3 is that the master of the embodiment of the present invention 1 middle and upper part structure looks schematic cross-section;
Fig. 4 is that the master of the embodiment of the present invention 1 middle and lower part structure looks schematic cross-section;
Fig. 5 is the structural representation of the present invention for the laser cutting head embodiment 2 with steel;
Fig. 6 is that the master of the embodiment of the present invention 2 middle and upper part structures looks schematic cross-section;
Fig. 7 is that the master of the embodiment of the present invention 2 middle and lower part structures looks schematic cross-section;
Fig. 8 is the schematic top plan view of the embodiment of the present invention 2 middle and lower part structures.
In figure: chamber is dispersed by 1 cutting head body, 2 laser vias, 3 jet cavity volumes, 4 jet structures, 5 pressurize air admission holes, 6 injection air intake ducts, 11 superstructures, 12 substructures, 13 sealing rings, 21 curved surface air-guide sections, 41 contraction chambers, 42 throats, 43.
Detailed description of the invention
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's statement, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
As shown in Figure 1, 2, a kind of for the laser cutting head with steel, comprise cutting head body 1, the axle center of described cutting head body 1 is provided with laser via 2, in described cutting head body 1, offer the jet cavity volume 3 of a ring shape around laser via 2, the object of jet cavity volume 3 is secondary air to enter the front maintenance pressure of jet structure 4 even, so in order better to realize this purpose, the volume of jet cavity volume 3 is greater than the volume of jet structure 4 in the present invention; On cutting head body 1 sidewall, offer pressurize air admission hole 5 and spray air intake duct 6, described pressurize air admission hole 5 is communicated with laser via 2, described injection air intake duct 6 is communicated with jet cavity volume 3, the air-flow that pressurize air admission hole 5 enters provides certain malleation for laser via 2, can prevent the pollution to laser via 2 such as jet-stream wind and cutting dust, the spatter property that has ensured laser via 2, can improve beam quality, extends the relevant optical life-span; Cutting head body 1 bottom offers the jet structure 4 being communicated with jet cavity volume 3, and jet structure 4 is around the axle center of laser via 2 Central Symmetry, and the vertical cross-section of described jet structure 4 is from top to bottom by contraction chamber 41, throat 42 with disperse chamber 43 3 parts and form.
In the present invention, for the ease of the processing of jet structure 4, described contraction chamber 41 is taper.
In addition, in order further to avoid external dust to enter in laser via 2, the outer wall that described laser via 2 is positioned at jet structure 4 outlet belows is curved surface air-guide section 21, curved surface air-guide section 21 can make air-flow that jet structure 4 sprays because of wall attachment effect laser via 2 go out interruption-forming negative pressure, effectively prevent from cutting the pollution of dust to laser components and parts.
In the present embodiment, in order to simplify difficulty of processing, improve the machining accuracy of jet structure 4, as shown in Figure 3,4, described cutting head body 1 is made up of superstructure 11 and substructure 12 two parts, and described laser via 2 is as a whole with 11 one-tenth of superstructures, and described substructure 12 is enclosed within outside laser via 2, substructure 12 is sealedly and fixedly connected on the lower surface of superstructure 11, between superstructure 11 and substructure 12, is provided with sealing ring 13; Described jet structure 4 is a ring jet cavity, and ring jet cavity is coaxial with laser via 2, and the inwall of ring jet cavity is the outer wall of laser via 2, and the outer wall of ring jet cavity is the inwall of substructure 12.
Embodiment 2
As Fig. 5, 6, 7, shown in 8, a kind of for the laser cutting head with steel, embodiment 2 is with the difference of embodiment 1, described cutting head body 1 is made up of superstructure 11 and substructure 12 two parts, described laser via 2 is as a whole with 11 one-tenth of superstructures, described substructure 12 is enclosed within outside laser via 2, substructure 12 is sealedly and fixedly connected on the lower surface of superstructure 11, between superstructure 11 and substructure 12, be provided with sealing ring 13, described jet structure 4 is made up of some fumaroles that are opened in substructure 12, some fumaroles are annular array centered by the axle center of laser via 2, in the present embodiment, described fumarole has four.
Claims (7)
1. one kind for the laser cutting head with steel, it is characterized in that: comprise cutting head body (1), the axle center of described cutting head body (1) is provided with laser via (2), in described cutting head body (1), offer the jet cavity volume (3) of a ring shape around laser via (2), on cutting head body (1) sidewall, offer pressurize air admission hole (5) and spray air intake duct (6), described pressurize air admission hole (5) is communicated with laser via (2), and described injection air intake duct (6) is communicated with jet cavity volume (3); Cutting head body (1) bottom offers the jet structure (4) being communicated with jet cavity volume (3), jet structure (4) is around the axle center Central Symmetry of laser via (2), and the vertical cross-section of described jet structure (4) is from top to bottom by contraction chamber (41), throat (42) with disperse chamber (43) three parts and form.
2. as claimed in claim 1 for the laser cutting head with steel, it is characterized in that: described contraction chamber (41) is taper.
3. as claimed in claim 1 for the laser cutting head with steel, it is characterized in that: the outer wall that described laser via (2) is positioned at jet structure (4) outlet below is curved surface air-guide section (21).
4. as claimed in claim 1 for the laser cutting head with steel, it is characterized in that: the volume of described jet cavity volume (3) is greater than the volume of jet structure (4).
As described in any claim in claim 1 ~ 4 for the laser cutting head with steel, it is characterized in that: described cutting head body (1) is made up of superstructure (11) and substructure (12) two parts, described laser via (2) becomes as a whole with superstructure (11), described substructure (12) is enclosed within outside laser via (2), substructure (12) is sealedly and fixedly connected on the lower surface of superstructure (11), between superstructure (11) and substructure (12), be provided with sealing ring (13).
6. as claimed in claim 5 for the laser cutting head with steel, it is characterized in that: described jet structure (4) is a ring jet cavity, ring jet cavity is coaxial with laser via (2), the inwall of ring jet cavity is the outer wall of laser via (2), and the outer wall of ring jet cavity is the inwall of substructure (12).
7. as claimed in claim 5 for the laser cutting head with steel, it is characterized in that: described jet structure (4) is made up of some fumaroles that are opened in substructure (12), and some fumaroles are annular array centered by the axle center of laser via (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169941.3A CN104139242B (en) | 2013-05-10 | 2013-05-10 | For the laser cutting head with steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169941.3A CN104139242B (en) | 2013-05-10 | 2013-05-10 | For the laser cutting head with steel |
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| Publication Number | Publication Date |
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| CN104139242A true CN104139242A (en) | 2014-11-12 |
| CN104139242B CN104139242B (en) | 2016-03-30 |
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| CN201310169941.3A Active CN104139242B (en) | 2013-05-10 | 2013-05-10 | For the laser cutting head with steel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104708198A (en) * | 2015-03-02 | 2015-06-17 | 大族激光科技产业集团股份有限公司 | Cutting nozzle airflow cavity device and cutting nozzle system |
| CN105728940A (en) * | 2016-04-29 | 2016-07-06 | 哈尔滨工业大学 | Laser welding coaxial protection device |
| CN107262938A (en) * | 2017-05-09 | 2017-10-20 | 佛山市励祺机电设备有限公司 | A kind of laser cutting torch and its production method |
| CN109570777A (en) * | 2018-12-29 | 2019-04-05 | 大族激光科技产业集团股份有限公司 | Electrostatic ionic wind cleaning device, electrostatic ionic wind cleaning systems and laser cutting machine |
| CN109865945A (en) * | 2019-01-25 | 2019-06-11 | 苏州迅镭激光科技有限公司 | A kind of laser cutting head with cooling heat sinking function |
| CN110421276A (en) * | 2019-08-30 | 2019-11-08 | 佛山市宏石激光技术有限公司 | A kind of laser cutting head aqueous vapor one cooling device |
| CN111168230A (en) * | 2020-03-04 | 2020-05-19 | 济南邦德激光股份有限公司 | Focusing device and focusing method of laser cutting machine |
| CN113798694A (en) * | 2021-09-10 | 2021-12-17 | 奔腾激光(温州)有限公司 | 2-kilowatt low-pressure cutting process |
| CN115945780A (en) * | 2022-12-22 | 2023-04-11 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
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| JPH0299292A (en) * | 1988-10-04 | 1990-04-11 | Shinko Kogyo Co Ltd | Laser machining nozzle |
| DE19848152A1 (en) * | 1998-10-20 | 2000-04-27 | Univ Stuttgart Strahlwerkzeuge | Processing head for cutting or drilling workpieces has a deviation device with a guide surface which lengthens the boundary surface of the Laval nozzle facing the workpiece |
| JP2007061861A (en) * | 2005-08-31 | 2007-03-15 | Shibuya Kogyo Co Ltd | Laser machining apparatus |
| CN101104222A (en) * | 2007-08-16 | 2008-01-16 | 上海交通大学 | Supersonic speed nozzle for laser cutting |
| CN201427226Y (en) * | 2009-07-24 | 2010-03-24 | 瑞安市博业激光应用技术有限公司 | Air blast nozzle for laser cutting machines |
| CN202684335U (en) * | 2012-01-19 | 2013-01-23 | 昆山思拓机器有限公司 | Coaxial nozzle used for thin-wall tube laser micromachining |
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2013
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0299292A (en) * | 1988-10-04 | 1990-04-11 | Shinko Kogyo Co Ltd | Laser machining nozzle |
| DE19848152A1 (en) * | 1998-10-20 | 2000-04-27 | Univ Stuttgart Strahlwerkzeuge | Processing head for cutting or drilling workpieces has a deviation device with a guide surface which lengthens the boundary surface of the Laval nozzle facing the workpiece |
| JP2007061861A (en) * | 2005-08-31 | 2007-03-15 | Shibuya Kogyo Co Ltd | Laser machining apparatus |
| CN101104222A (en) * | 2007-08-16 | 2008-01-16 | 上海交通大学 | Supersonic speed nozzle for laser cutting |
| CN201427226Y (en) * | 2009-07-24 | 2010-03-24 | 瑞安市博业激光应用技术有限公司 | Air blast nozzle for laser cutting machines |
| CN202684335U (en) * | 2012-01-19 | 2013-01-23 | 昆山思拓机器有限公司 | Coaxial nozzle used for thin-wall tube laser micromachining |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104708198A (en) * | 2015-03-02 | 2015-06-17 | 大族激光科技产业集团股份有限公司 | Cutting nozzle airflow cavity device and cutting nozzle system |
| CN105728940A (en) * | 2016-04-29 | 2016-07-06 | 哈尔滨工业大学 | Laser welding coaxial protection device |
| CN107262938A (en) * | 2017-05-09 | 2017-10-20 | 佛山市励祺机电设备有限公司 | A kind of laser cutting torch and its production method |
| CN109570777A (en) * | 2018-12-29 | 2019-04-05 | 大族激光科技产业集团股份有限公司 | Electrostatic ionic wind cleaning device, electrostatic ionic wind cleaning systems and laser cutting machine |
| CN109865945A (en) * | 2019-01-25 | 2019-06-11 | 苏州迅镭激光科技有限公司 | A kind of laser cutting head with cooling heat sinking function |
| CN109865945B (en) * | 2019-01-25 | 2024-03-22 | 苏州迅镭激光科技有限公司 | Laser cutting head with cooling and heat dissipation functions |
| CN110421276B (en) * | 2019-08-30 | 2023-09-19 | 广东宏石激光技术股份有限公司 | Water-air integrated cooling device for laser cutting head |
| CN110421276A (en) * | 2019-08-30 | 2019-11-08 | 佛山市宏石激光技术有限公司 | A kind of laser cutting head aqueous vapor one cooling device |
| CN111168230A (en) * | 2020-03-04 | 2020-05-19 | 济南邦德激光股份有限公司 | Focusing device and focusing method of laser cutting machine |
| CN111168230B (en) * | 2020-03-04 | 2022-03-04 | 济南邦德激光股份有限公司 | Focusing device and focusing method of laser cutting machine |
| CN113798694B (en) * | 2021-09-10 | 2023-08-25 | 奔腾激光(浙江)股份有限公司 | Low-pressure cutting process of 2W |
| CN113798694A (en) * | 2021-09-10 | 2021-12-17 | 奔腾激光(温州)有限公司 | 2-kilowatt low-pressure cutting process |
| CN115945780A (en) * | 2022-12-22 | 2023-04-11 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
| CN115945780B (en) * | 2022-12-22 | 2023-07-21 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
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