CN102508362A - Double beam coupling device - Google Patents
Double beam coupling device Download PDFInfo
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- CN102508362A CN102508362A CN2011103622385A CN201110362238A CN102508362A CN 102508362 A CN102508362 A CN 102508362A CN 2011103622385 A CN2011103622385 A CN 2011103622385A CN 201110362238 A CN201110362238 A CN 201110362238A CN 102508362 A CN102508362 A CN 102508362A
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Abstract
The invention discloses a double beam coupling device, which includes a collimation system used for collimating Nd:YAG laser and enabling the collimated laser beam to form a beam of parallel light, a first 45-degree reflector used for reflecting and changing the transmission direction of the Nd:YAG laser, a beam expanding system used for expanding the Nd:YAG frequency-doubled laser and obtaining light beams with different divergence angles, a second 45-degree reflector used for changing the transmission direction of the Nd:YAG frequency-doubled laser through the Nd:YAG laser and reflection, and a focusing system used for coupling and focusing the Nd:YAG laser and the Nd:YAG frequency-doubled laser to one position. The device overcomes the difficulty in welding processing by adopting the single Nd:YAG laser, and greatly improves the welding efficiency and the welding quality.
Description
Technical field
The present invention relates to be coupled focuses on the device of two bundle different wave length laser, relates in particular to the Two-beam Coupling device that is used to utilize two bundle different wavelength of laser Shu Jinhang welding processing.
Background technology
Nearly ten years, laser was widely applied in the commercial production, in particular for the aspects such as welding, cutting, punching, mark and surface treatment of metal.Aborning, it is more and more important that laser welding technology is just becoming, and this mainly has benefited from the obtainable high precision of laser bonding, high processing speed and workpiece is produced than the low thermal stress and the automaticity that can reach.Laser welding technology just progressively replaces traditional solder technology, especially in the production and processing high value added product, laser welding technology be the traditional welding technology can't match in excellence or beauty.
The current the most widely used LASER Light Source of laser welding system generally has two kinds.First kind is gas laser, i.e. carbon dioxide (CO
2) laser instrument, its optical maser wavelength is 10.6 microns.Second kind is solid state laser, i.e. Nd:YAG (Nd:Y
3Al
5O
12, neodymium-doped yttrium-aluminum garnet) and laser instrument, its optical maser wavelength is 1.064 microns.The actuating medium of Nd:YAG laser instrument is the YAG crystal bar of a small amount of rare earth element nd of doping (neodymium).The Nd:YAG laser instrument can continuous oscillation, also can utilize Q-switch to produce the giant-pulse vibration, and also can produce pulse width is the long pulse of 100 microseconds above (being generally 1～10 millisecond).
In laser bonding was used, the optical coupled characteristic of laser beam and material to be welded was considerable.If the optical coupled characteristic is bad, material is high to the reflectivity of this optical maser wavelength, and then material is low to the absorption efficiency of this laser, can't absorb this laser efficiently, therefore is difficult to obtain a good welding effect.At room temperature, the absorption efficiency of metal pair carbon dioxide laser such as gold, silver, copper and Nd:YAG laser is low especially, adopts the carbon dioxide laser of single wavelength or metals such as Nd:YAG laser bonding processing gold, silver, copper can't obtain good effect.By contrast, at room temperature, the double-frequency laser of metal pair Nd:YAG laser such as gold, silver, copper (wavelength is 532 nanometers) is but very high, and its absorption coefficient is 5～10 times of Nd:YAG laser.
Two general rules are arranged: the first, to commaterial, Wavelength of Laser is long more, and the absorption coefficient of material for laser light is low more; Optical maser wavelength is short more, and the absorption coefficient of material for laser light is high more.The second, the temperature of metal is high more, and is high more to the absorption efficiency of laser.Therefore; In the time of metals such as welding processing gold, silver, copper, can be earlier metals such as gold, silver, copper be carried out preheating, workpiece is heated near the fusing point of this metal with the double-frequency laser of Nd:YAG laser; And then apply a branch of Nd:YAG laser, accomplish last welding job.
Optical glass is different to the refractive index of the double-frequency laser (wavelength is 532 nanometers) of Nd:YAG laser (wavelength is 1.064 microns) and Nd:YAG laser; Focus on this two bundles laser with monolithic optical glass and can produce aberration; That is, the focusing focus of this two bundles laser is not or not same place.Even use the focusing that is coupled of achromatic compound lens, the distance of the focal position of this two bundles laser reduces to some extent, but still not in the localities same.Metal price such as gold, silver, copper is expensive, adopts the achromatism compound lens to be coupled and focuses on Nd:YAG laser and double-frequency laser thereof, can't obtain reasonable welding effect.
Summary of the invention
The present invention is directed to welding gold, silver, copper etc. and have the metal of high reflectance and the problem that alloy exists, a kind of Two-beam Coupling device is provided.This coupling device focuses on the coupling of the double-frequency laser (wavelength is 532 nanometers) of Nd:YAG laser (wavelength is 1.064 microns) and Nd:YAG on the same position easily; Welding processing has the metal and the alloy of high reflectance well, thereby enhances productivity and quality.
The technical scheme that the present invention takes is that a kind of Two-beam Coupling device comprises: colimated light system, be used for collimation Nd:YAG laser, and make the laser beam behind the collimation form a branch of directional light; The one 45 degree catoptron is used to reflect and change the transmission direction of Nd:YAG laser; Beam-expanding system is used to expand the double-frequency laser of restrainting Nd:YAG, obtains the light beam of the different angles of divergence; The 2 45 degree catoptron is used for the transmission direction through the double-frequency laser of Nd:YAG laser and reflection and change Nd:YAG; Focusing system, being used to be coupled focuses on the double-frequency laser of Nd:YAG laser and Nd:YAG, makes this two bundles laser focusing in same position.
Beneficial effect of the present invention is that the optical coupled characteristic that Nd:YAG laser and copper, silver and gold etc. have the high reflectance metal is an extreme difference; But the double-frequency laser of Nd:YAG and copper, silver and golden optical coupled characteristic are quite high.Utilize this two bundles laser to weld; The double-frequency laser elder generation of Nd:YAG is heated to workpiece to be processed near the fusing point of workpiece; And then utilize Nd:YAG laser to accomplish last welding job; Thereby overcome the difficulty that adopts single Nd:YAG laser bonding processing to be produced, and improved welding efficiency and welding quality widely.
Description of drawings
Fig. 1 is according to one embodiment of the invention, and coupling focuses on the device rough schematic view of two bundle different wave length laser
Fig. 2 is coupling two bundle different wave length laser and the device rough schematic view that adopts the focusing of achromatism compound lens
Fig. 3 a, Fig. 3 b are in the present embodiment, from the laser of optical fiber coupling output through the optical glass collimation or expand the device rough schematic view of bundle
Fig. 4 a, Fig. 4 b are in the present embodiment, and common Solid State Laser is through the optical glass collimation or expand the device rough schematic view of restrainting
Embodiment
Do to describe in further detail below in conjunction with the accompanying drawing specific embodiments of the invention.
Fig. 1 is according to one embodiment of the invention, and coupling focuses on the device rough schematic view of two bundle different wave length laser.This coupling device comprises: colimated light system 11 is collimated into almost parallel laser beam with Nd:YAG laser beam 1; The one 45 degree catoptron 12 is used for little loss ground reflection Nd:YAG laser beam 1, makes its transmission direction change 90 degree; Beam-expanding system 13 is restrainted the light beam that becomes to have certain angle of divergence with double-frequency laser bundle 2 expansions of Nd:YAG; The 2 45 degree catoptron 14 is used for little loss ground through Nd:YAG laser beam 1, and the double-frequency laser bundle 2 of little loss ground reflection Nd:YAG, makes double-frequency laser bundle 2 transmission directions of Nd:YAG change 90 degree; Focusing system 15, being used to be coupled focuses on the double-frequency laser bundle 2 of Nd:YAG laser beam 1 and Nd:YAG, makes this two bundles laser focusing on the same position of workpiece to be processed 16.
For little loss ground transmission laser, require to be coated with the deielectric-coating that Nd:YAG laser beam 1 height is passed through on the optical glass of colimated light system 11; Be coated with the deielectric-coating that double-frequency laser bundle 2 height to Nd:YAG pass through on the optical glass of beam-expanding system 13; Be coated with on the reflecting surface of the one 45 degree catoptron 12 the high anti-deielectric-coating of Nd:YAG laser beam 1 (incident angle is 45 degree); Be coated with on the minute surface of the 2 45 degree catoptron 14 and pass through and to the high anti-deielectric-coating of double-frequency laser bundle 2 (incident angle is 45 degree) of Nd:YAG Nd:YAG laser beam 1 (incident angle be 45 degree) is high.Be coated with the deielectric-coating that Nd:YAG laser beam 1 double-frequency laser bundle 2 height thoroughly high and Nd:YAG are passed through on two surfaces of the optical glass of focusing system 15.
In the present embodiment, laser beam 1 is that wavelength is 1.064 microns a Nd:YAG laser, and laser beam 2 is that wavelength is the double-frequency laser of the Nd:YAG of 532 nanometers.Through changing the relative position of optical glass in the beam-expanding system 13, laser beam 2 expanded restraint the light beam that becomes to have certain angle of divergence, make the focal position after its line focus system in focus identical with the focal position of laser beam 1.Personnel with laser technology can exchange laser beam 1 and laser beam 2 easily, and change the optical coating on colimated light system 11, beam-expanding system the 13, the 1 degree catoptron 12 and the 2 45 degree catoptron 14, thereby reach identical coupling focussing force.Likewise; Change the wavelength of laser beam 1 and laser beam 2; And change the optical coating on colimated light system 11, beam-expanding system the 13, the 1 degree catoptron the 12, the 2 45 degree catoptron 14 and the focusing system 15, also can realize easily being coupled focuses on the purpose of two bundle different wave length laser.What Fig. 1 told about is the principle of coupling two bundle different wave length laser, should not limit protection scope of the present invention with this.
Fig. 2 is coupling two bundle different wave length laser and the device rough schematic view that adopts the focusing of achromatism compound lens.Laser beam 1 becomes almost parallel laser beam behind colimated light system 11 collimations, after 12 reflections of the one 45 degree catoptron, again through the 2 45 degree catoptron 14, focused on the workpiece 16 by achromatism compound lens 21 at last.Laser beam 2 becomes almost parallel laser beam behind colimated light system 13 collimations, through 14 reflections of the 2 45 degree catoptron, focused on the workpiece 16 by achromatism compound lens 21 at last.Though used the achromatism compound lens, the distance between laser beam 1 and laser beam 2 two focuses after achromatism compound lens 21 focuses on has been reduced widely, but still has focus difference Δ f.When needing metals such as the expensive gold, silver of Precision Machining and processing, copper, this focus difference still can't satisfy the requirement of processing.Will focus difference be reduced to zero, must increase the quantity of compound lens optical glass, but this has just increased cost widely.Fig. 1 is through changing the relative position of optical glass in the beam-expanding system 13; The laser beam that becomes to have the suitable angle of divergence is restrainted in laser beam 2 expansions, and through the condenser lens coupling focusing of monolithic, its focal position is identical with the focal position of laser beam 1; Reach the requirement that focuses on, and reduced cost.
Fig. 3 a, Fig. 3 b are in the present embodiment, from the laser of optical fiber coupling output through the optical glass collimation or expand the device rough schematic view of bundle.In Fig. 3 a, laser is after optical fiber 31 coupling outputs, and the optical glass 32 of employing monolithic can be realized the purpose of laser alignment laser alignment being become almost parallel laser beam.In the beam-expanding system of Fig. 3 b, laser moves monolithic optical glass 32 after optical fiber 31 coupling outputs to optical fiber 31, can laser beam expanding be become to have the purpose of certain angle of divergence.
Fig. 4 a, Fig. 4 b are in the present embodiment, and common Solid State Laser is through the optical glass collimation or expand the device rough schematic view of restrainting.In Fig. 4 a, the Galileo telescope of the upside-down mounting that colimated light system is made up of a negative lens 41 and positive lens 42, laser can become almost parallel laser beam through behind this colimated light system.In the beam-expanding system of Fig. 4 b, positive lens 42 is moved to negative lens 41, can laser beam expanding be become to have the purpose of certain angle of divergence.
To the different laser light source, the colimated light system 11 in Fig. 1 can adopt the colimated light system shown in Fig. 3 a or the 4a; 13 of beam-expanding systems can adopt the beam-expanding system shown in Fig. 3 b or the 4b.
Claims (9)
1. Two-beam Coupling device is characterized in that: comprising: colimated light system, be used for collimation Nd:YAG laser, and make the laser beam behind the collimation form a branch of directional light; The one 45 degree catoptron is used to reflect and change the transmission direction of Nd:YAG laser; Beam-expanding system is used to expand the double-frequency laser of restrainting Nd:YAG, obtains the light beam of the different angles of divergence; The 2 45 degree catoptron is used for the transmission direction through the double-frequency laser of Nd:YAG laser and reflection and change Nd:YAG; Focusing system, being used to be coupled focuses on the double-frequency laser of Nd:YAG laser and Nd:YAG, makes this two bundles laser focusing in same position.
2. Two-beam Coupling device according to claim 1 is characterized in that: described beam-expanding system changes the expansion bundle multiple of this system through the optical glass in the mobile system, thereby obtains the laser of the suitable angle of divergence.
3. Two-beam Coupling device according to claim 1 is characterized in that: the Nd:YAG optical maser wavelength of described colimated light system collimation is 1.064 microns.
4. Two-beam Coupling device according to claim 1 is characterized in that: the double-frequency laser wavelength that said beam-expanding system expands bundle Nd:YAG is 532 nanometers.
5. Two-beam Coupling device according to claim 1 is characterized in that: being coated with Nd:YAG laser, incident angle on the reflecting surface of described the one 45 degree catoptron is the high reflecting medium film of 45 degree.
6. Two-beam Coupling device according to claim 1 is characterized in that: to be coated with Nd:YAG laser, incident angle on the minute surface of described the 2 45 degree catoptron be that 45 degree are high passes through and is the deielectric-coating of the high reflection of 45 degree to double-frequency laser, the incident angle of Nd:YAG.
7. Two-beam Coupling device according to claim 1 is characterized in that: be coated with on the surface of the optical glass of focusing system and pass through and deielectric-coating that the double-frequency laser height of Nd:YAG passes through Nd:YAG laser is high.
8. Two-beam Coupling device according to claim 1 is characterized in that: be coated with the deielectric-coating that Nd:YAG laser height is passed through on the optical glass of colimated light system.
9. Two-beam Coupling device according to claim 1 is characterized in that: be coated with the deielectric-coating that the double-frequency laser height to Nd:YAG passes through on the optical glass of beam-expanding system.
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| CN2011103622385A CN102508362A (en) | 2011-11-15 | 2011-11-15 | Double beam coupling device |
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|---|---|---|---|
| CN2011103622385A CN102508362A (en) | 2011-11-15 | 2011-11-15 | Double beam coupling device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896419A (en) * | 2012-10-23 | 2013-01-30 | 华南师范大学 | Double-laser beam compound welding device and use method thereof |
| CN104121851A (en) * | 2013-04-25 | 2014-10-29 | 沃柯有限公司 | Device for detecting a 3D structure of an object |
| CN106181032A (en) * | 2016-07-29 | 2016-12-07 | 温州大学 | A kind of laser welding system and method |
| CN108788453A (en) * | 2018-06-19 | 2018-11-13 | 深圳市万顺兴科技有限公司 | A kind of recombination laser plumb joint |
| CN108883497A (en) * | 2016-01-29 | 2018-11-23 | 卡尔伯格-基金会 | For hot worked device and method |
| CN110091073A (en) * | 2019-05-28 | 2019-08-06 | 中国科学院宁波材料技术与工程研究所 | Multiple beam coupled laser system of processing and method |
| CN110421251A (en) * | 2018-05-01 | 2019-11-08 | 株式会社岛津制作所 | Laser processing device |
| CN111975216A (en) * | 2019-05-23 | 2020-11-24 | 中国石油天然气股份有限公司 | Multi-beam laser processing device and method |
| CN112247371A (en) * | 2020-10-13 | 2021-01-22 | 镭煌激光技术(苏州)有限公司 | Flexible laser energy combining control system of laser light path |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102896419A (en) * | 2012-10-23 | 2013-01-30 | 华南师范大学 | Double-laser beam compound welding device and use method thereof |
| CN104121851A (en) * | 2013-04-25 | 2014-10-29 | 沃柯有限公司 | Device for detecting a 3D structure of an object |
| CN104121851B (en) * | 2013-04-25 | 2018-03-20 | 沃柯有限公司 | Equipment for the 3D structures of detection object |
| CN108883497A (en) * | 2016-01-29 | 2018-11-23 | 卡尔伯格-基金会 | For hot worked device and method |
| CN106181032B (en) * | 2016-07-29 | 2019-02-01 | 温州大学 | A kind of laser welding system and method |
| CN106181032A (en) * | 2016-07-29 | 2016-12-07 | 温州大学 | A kind of laser welding system and method |
| CN110421251A (en) * | 2018-05-01 | 2019-11-08 | 株式会社岛津制作所 | Laser processing device |
| CN108788453A (en) * | 2018-06-19 | 2018-11-13 | 深圳市万顺兴科技有限公司 | A kind of recombination laser plumb joint |
| CN111975216A (en) * | 2019-05-23 | 2020-11-24 | 中国石油天然气股份有限公司 | Multi-beam laser processing device and method |
| CN111975216B (en) * | 2019-05-23 | 2022-05-10 | 中国石油天然气股份有限公司 | Multi-beam laser processing device and method |
| CN110091073A (en) * | 2019-05-28 | 2019-08-06 | 中国科学院宁波材料技术与工程研究所 | Multiple beam coupled laser system of processing and method |
| CN112247371A (en) * | 2020-10-13 | 2021-01-22 | 镭煌激光技术(苏州)有限公司 | Flexible laser energy combining control system of laser light path |
| CN112247371B (en) * | 2020-10-13 | 2022-08-02 | 镭煌激光技术(苏州)有限公司 | Flexible laser energy combining control system of laser light path |
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Application publication date: 20120620 |