CN104139242B - For the laser cutting head with steel - Google Patents
For the laser cutting head with steel Download PDFInfo
- Publication number
- CN104139242B CN104139242B CN201310169941.3A CN201310169941A CN104139242B CN 104139242 B CN104139242 B CN 104139242B CN 201310169941 A CN201310169941 A CN 201310169941A CN 104139242 B CN104139242 B CN 104139242B
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- cutting head
- laser
- jet
- laser via
- head body
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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 present invention relates to laser cutting field, particularly relate to a kind of laser cutting head of laser high-speed cutting belt steel.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, offer the jet cavity volume of a ring shape around laser via in described cutting head body, 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 portion offers the jet structure be communicated with jet cavity volume, and jet structure is symmetrical around the eccentric axial of laser via, and the vertical cross-section of described jet structure is from top to bottom by contraction chamber, throat with disperse chamber three part and form.Jet purge passage is separated with laser via and ensures that cutting dust cannot enter laser via, ensure that the spatter property of laser via, can improve beam quality by wall attachment effect by the present invention, extends the relevant optical life-span.
Description
Technical field
The present invention relates to laser cutting field, particularly relate 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 reduce, even lower than traditional diamond-making technique with becoming geometric progression.3, laser cutting is without the need to cutter and mould.Under the control of the computer, directly can realize the plate class of arbitrary shape in two dimension, three-dimensional and the Flexible Manufacture of shell part, be specially adapted to the processing of the multi items of new product development development phase, the metal plate parts of small lot, Design of Dies costly, manufacturing expenses can be saved, 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, protection the condenser lens even effect of providing unit point ablation energy.Gas pressure, flow are the key factors affecting cut quality, and hypotony can blow the melted material of incision; Too high, easily form eddy current at surface of the work, weaken the effect that air-flow removes melted material on the contrary.Facts have proved, the nozzle of different structure also can produce different impacts to cutting.
Domestic and international for laser cutting nozzle at present, especially the research of high-rate laser cutting nozzle is little, its form of nozzle is mainly based on single hole, and medium is based on gas, and its shortcoming is mainly under the prerequisite ensureing gas pressure, to provide cooling and the gas flow needed for slag removal.Patent CN200510095474.X, according to Laval configuration 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 gives a kind of superonic flow nozzzle, and form the entirety that communicates by four parts such as parallel-segment, converging portion, throat and divergent section, its converging portion and divergent section are complex curve, and this increases great difficulty to nozzle processing.Patent CN101508059A provides a kind of nozzle be made up of cutting head main body, water trap and return slag device, it is advantageous that nozzle is split type, arranges return slag mouth simultaneously, can improve the spatter property of nozzle machining accuracy and laser via.These laser cutting designs of nozzles all 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 being separated with laser via, ensure that 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, offer the jet cavity volume of a ring shape around laser via in described cutting head body, 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 portion offers the jet structure be communicated with jet cavity volume, and jet structure is symmetrical around the eccentric axial of laser via, and the vertical cross-section of described jet structure is from top to bottom by contraction chamber, throat with disperse chamber three part 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, is provided with sealing ring between superstructure and substructure.
Described jet structure is a ring jet cavity, and ring jet cavity is coaxial with laser via, and the inwall of ring jet cavity is the outer wall of laser via, and the outer wall of ring jet cavity is the inwall of substructure.
Described jet structure is made up of some fumaroles be opened in substructure, and some fumaroles are annular array centered by the axle center of laser via.
The present invention conveniently processes employing split-type design for the laser cutting head with steel, achieve combined nozzle design, three relatively independent machined surfaces are decomposed into by nozzle and cavity volume thereof, effectively simplify the difficulty of processing of nozzle segment, thus improve feasibility and the machining accuracy of Machining of Curved Surface.
Jet structure is the nozzle cavity of continuous curve surface composition, injection fluid is made to obtain supersonic speed through compression and expansion process, polymerizable fluid point overlaps with laser spot simultaneously, by the nozzle arrangements that annular center is symmetrical, jet amount can be considerably increased not increasing under the harm prerequisites such as the flow field shock wave of fluid and eddy current; Jet purge passage is separated with laser via, the low-pressure air current avoiding laser via to produce negative pressure is only passed in laser via, the jet structure of similar Rafael nozzle is utilized to realize fluid supersonic velocity, and ensure that cutting dust cannot enter laser via by wall attachment effect, ensure that the spatter property of laser via, can beam quality be improved, extend the relevant optical life-span.
Accompanying drawing explanation
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 superstructure 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 superstructure looks schematic cross-section;
Fig. 7 is that the master of the embodiment of the present invention 2 middle and lower part structure looks schematic cross-section;
Fig. 8 is the schematic top plan view of the embodiment of the present invention 2 middle and lower part structure.
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, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's statement.
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, offer the jet cavity volume 3 of a ring shape around laser via 2 in described cutting head body 1, the object of jet cavity volume 3 is that secondary air keeps pressure uniform before entering jet structure 4, so in order to better realize this purpose, the volume of jet cavity volume 3 is greater than the volume of jet structure 4 in the present invention; 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, the pollution to laser via 2 such as jet-stream wind and cutting dust can be prevented, ensure that the spatter property of laser via 2, can beam quality be improved, extend the relevant optical life-span; Offer the jet structure 4 be communicated with jet cavity volume 3 bottom cutting head body 1, jet structure 4 is symmetrical around the eccentric axial 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 3 part and form.
In the present invention, for the ease of the processing of jet structure 4, described contraction chamber 41 is taper.
In addition, enter in laser via 2 in order to external dust can be avoided further, the outer wall that described laser via 2 is positioned at jet structure 4 outlet below is curved surface air-guide section 21, the air-flow that curved surface air-guide section 21 can make jet structure 4 spray goes out interruption-forming negative pressure because of wall attachment effect at laser via 2, effectively prevents cutting dust to the pollution of 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 superstructure 11 one-tenth, 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, is provided with sealing ring 13 between superstructure 11 and substructure 12; 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 superstructure 11 one-tenth, described substructure 12 is enclosed within outside laser via 2, substructure 12 is sealedly and fixedly connected on the lower surface of superstructure 11, sealing ring 13 is provided with between superstructure 11 and substructure 12, described jet structure 4 is made up of some fumaroles be 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 (6)
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), offer the jet cavity volume (3) of a ring shape around laser via (2) in described cutting head body (1), 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) be communicated with jet cavity volume (3), jet structure (4) is symmetrical around the eccentric axial of laser via (2), 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 part and form, and the outer wall that described laser via (2) is positioned at jet structure (4) outlet below is curved surface air-guide section (21).
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 volume of described jet cavity volume (3) is greater than the volume of jet structure (4).
4. as described in a claim any in claim 1 ~ 3 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 laser via (2) outward, substructure (12) is sealedly and fixedly connected on the lower surface of superstructure (11), sealing ring (13) is provided with between superstructure (11) and substructure (12).
5. as claimed in claim 4 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).
6. as claimed in claim 4 for the laser cutting head with steel, it is characterized in that: described jet structure (4) is made up of some fumaroles be 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 CN104139242A (en) | 2014-11-12 |
| CN104139242B true 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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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104708198B (en) * | 2015-03-02 | 2016-09-14 | 大族激光科技产业集团股份有限公司 | Cutting head air flow chamber device and cutting head 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 |
| CN109570777B (en) * | 2018-12-29 | 2021-06-25 | 大族激光科技产业集团股份有限公司 | Electrostatic ion wind cleaning device, electrostatic ion wind cleaning system and laser cutting machine |
| 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 |
| 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 |
| 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 |
Citations (4)
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|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0299292A (en) * | 1988-10-04 | 1990-04-11 | Shinko Kogyo Co Ltd | Laser machining nozzle |
| JP4720380B2 (en) * | 2005-08-31 | 2011-07-13 | 澁谷工業株式会社 | Laser processing equipment |
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2013
- 2013-05-10 CN CN201310169941.3A patent/CN104139242B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| CN104139242A (en) | 2014-11-12 |
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