CN103252575B - A kind of optical delivery method and system for Materialbearbeitung mit Laserlicht - Google Patents
A kind of optical delivery method and system for Materialbearbeitung mit Laserlicht Download PDFInfo
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- CN103252575B CN103252575B CN201310196782.6A CN201310196782A CN103252575B CN 103252575 B CN103252575 B CN 103252575B CN 201310196782 A CN201310196782 A CN 201310196782A CN 103252575 B CN103252575 B CN 103252575B
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Abstract
A kind of optical delivery method and system for Materialbearbeitung mit Laserlicht, carry out converting and focusing on via a beam coupling system by the laser beam that laser energy sources exports, and the size of focal spot and the angle of divergence are controlled, this laser beam is divided into two parts the fibre core and inner cladding that are coupled into double clad energy-transmission optic fibre respectively; By double clad energy-transmission optic fibre by Laser energy transmission to processing stand; The laser energy transmitted by above-mentioned energy-transmission optic fibre focuses to machined surface via an optical focusing system. The present invention utilizes the fibre core of doubly clad optical fiber and inner cladding to transmit two bundle laser simultaneously, optical focusing system is restrainted two laser and is focused to different spot size respectively, carry out the materials processing such as laser weld or cut, improve the stability of conventional laser material processing plant and reduce cost.
Description
Technical field
The invention belongs to field of laser processing, be specifically related to a kind of optical delivery method and system for Materialbearbeitung mit Laserlicht.
Background technology
Adopt laser to carry out materials processing and manifest big advantage in the industrial production, it is obtained in fields such as electronics, automobile, ocean, the energy and is widely applied, concrete application includes cut, laser weld, laser surface hardening and laser marking etc., has occupied the substantial amounts of market share particularly in high power laser light cutting and welding aspect.
Substantial amounts of technical study is had been carried out in relevant technical field, existing research shows, when adopting high power laser light to carry out Metal Cutting, if can adopt auxiliary thermal source that processing stand peripheral region carries out auxiliary heating, cutting speed can be effectively improved, improve trimming quality, when same process is applied to the metal solder of high power laser light, then can mention speed of welding, reduce the stress produced in welding process, be effectively improved workpiece strength.
Generally adopt Compound Machining mode at present, such as in laser weld, it is possible to adopt a laser instrument to provide main energy source to weld, adopt the laser facula that other laser instrument offer is bigger simultaneously, auxiliary thermal source is provided in pad peripheral region; Also in some application, adopt the laser that a branch of hot spot is bigger to provide auxiliary thermal source in processing stand peripheral region, adopt the modes such as traditional argon arc or plasma to provide energy source to weld simultaneously.
The shortcoming of these methods is to need to adopt two independent energy sources, and adopts independent energy transform device and Voice segment system, and structure is complicated, and cost is also higher.
Summary of the invention
It is an object of the invention to design a kind of optical delivery method and system for Materialbearbeitung mit Laserlicht, improve the stability of conventional laser material processing plant and reduce cost.
For reaching above-mentioned purpose, the technical solution of the present invention is:
A kind of optical delivery method for Materialbearbeitung mit Laserlicht, carry out converting and focusing on via a beam coupling system by the laser beam that laser energy sources exports, and the size of focal spot and the angle of divergence are controlled, this laser beam is divided into two parts the fibre core and inner cladding that are coupled into double clad energy-transmission optic fibre respectively;By double clad energy-transmission optic fibre by Laser energy transmission to processing stand; The laser energy transmitted by above-mentioned energy-transmission optic fibre focuses to machined surface via an optical focusing system.
Further, described double clad energy-transmission optic fibre transmits two bundle laser simultaneously, the energy of the fibre core of described double clad energy-transmission optic fibre transmission major part, and machined material, as the main heating source of Laser Processing, is cut, the PROCESS FOR TREATMENT such as welding by this portion of energy; The energy of the inner cladding transmission smaller portions of described double clad energy-transmission optic fibre, this portion of energy is as the auxiliary thermal source of Laser Processing, to improve processing effect.
A kind of optical transmission system for Materialbearbeitung mit Laserlicht of the present invention, it includes successively: laser energy sources, optical coupling system, double clad energy-transmission optic fibre and optical focusing system; Laser energy sources provides the laser energy required for materials processing, laser energy is coupled into fibre core and the inner cladding of double clad energy-transmission optic fibre by optical coupling system by a certain percentage respectively, double clad energy-transmission optic fibre is by Laser energy transmission to optical focusing system, and the laser energy of fibre core and inner cladding is focused to different spot sizes by optical focusing system respectively.
Again, described optical coupling system is the ordinary optical imaging system comprising one or more spherical lens, or including a collimating lens, a light beam biasing prism and a condenser lens, or including orthogonal two cylindrical mirrors of axis, or include a coquille and a cylindrical mirror.
Further, the described double clad passive fiber that double clad energy-transmission optic fibre is common specification, or diameter and numerical aperture according to the individually designed non-generic specification of system requirements doubly clad optical fiber.
It addition, described optical focusing system comprises one or more sphere or non-spherical lens.
The present invention adopts a laser instrument to be simultaneously providing for main energy source and the auxiliary thermal source of processing, adopts an optical fiber to transmit main laser energy and auxiliary laser energy simultaneously. This optical transmission system comprises optical coupling system, double clad energy-transmission optic fibre and optical focusing system. Laser energy is coupled into fibre core and the inner cladding of double clad energy-transmission optic fibre respectively by optical coupling system with certain ratio, the fibre core and the inner cladding that utilize doubly clad optical fiber transmit two bundle laser simultaneously, two bundle laser of transmission in fiber core and inner cladding are focused to different spot size by optical focusing system respectively, carry out the materials processing such as laser weld or cut. Doubly clad optical fiber fibre core transmission major part energy is as the main heating source of Laser Processing, the inner cladding transmission smaller portions energy of doubly clad optical fiber is as auxiliary thermal source, adopting auxiliary thermal source can control amplitude and the speed of variations in temperature near machining area, the laser power ratio transmitted by changing core segment and inner cladding can optimize processing effect.
The invention have the advantages that
1, adopting a laser instrument to provide main energy source and auxiliary energy source, simple in construction, cost is low simultaneously.
2, adopt a double clad energy-transmission optic fibre to transmit main laser energy and auxiliary laser energy, simple in construction, good stability simultaneously.
3, by adjusting the optical parametric of optical coupling system and optical focusing system, the energy allocation proportion that main laser is asked can be regulated with auxiliary laser, can also regulating the spot size of processing stand place main spot and auxiliary laser, motility is high, it is easy to carry out process modification.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of optical transmission system embodiment one of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the hot spot scattergram in a cross section in light path in the embodiment of the present invention one.
Fig. 4 is the hot spot scattergram in another cross section in light path in the embodiment of the present invention one.
Fig. 5 is the schematic diagram of optical transmission system embodiment two of the present invention.
Fig. 6 is the hot spot scattergram in a cross section on beam Propagation direction in the embodiment of the present invention two.
Detailed description of the invention
Referring to Fig. 1, Fig. 2, a kind of optical delivery method for Materialbearbeitung mit Laserlicht of the present invention, laser beam laser energy sources 1 exported carries out converting and focusing on via a beam coupling system 2, and the size of focal spot and the angle of divergence are controlled, this laser beam is divided into two parts the fibre core and inner cladding that are coupled into double clad energy-transmission optic fibre 3 respectively; By double clad energy-transmission optic fibre by Laser energy transmission to processing stand; The laser energy transmitted by above-mentioned energy-transmission optic fibre focuses to machined surface via an optical focusing system 4.
Further, described double clad energy-transmission optic fibre 3 transmits two bundle laser simultaneously, the energy of the fibre core transmission major part of described double clad energy-transmission optic fibre, and machined material, as the main heating source of Laser Processing, is cut, the PROCESS FOR TREATMENT such as welding by this portion of energy; The energy of the inner cladding transmission smaller portions of described double clad energy-transmission optic fibre 3, this portion of energy is as the auxiliary thermal source of Laser Processing, to improve processing effect.
A kind of optical transmission system for Materialbearbeitung mit Laserlicht of the present invention, it includes successively: laser energy sources 1, optical coupling system 2, double clad energy-transmission optic fibre 3 and optical focusing system 4; Laser energy sources 1 provides the laser energy required for materials processing, laser energy is coupled into fibre core and the inner cladding of double clad energy-transmission optic fibre 3 by optical coupling system 2 by a certain percentage respectively, double clad energy-transmission optic fibre 3 is by Laser energy transmission to optical focusing system 4, and the laser energy of fibre core and inner cladding is focused to different spot sizes by optical focusing system 4 respectively.
Again, described optical coupling system 2 is the ordinary optical imaging system comprising one or more spherical lens, or including a collimating lens, a light beam biasing prism and a condenser lens, or including orthogonal two cylindrical mirrors of axis, or include a coquille and a cylindrical mirror.
Further, the described double clad passive fiber that double clad energy-transmission optic fibre 3 is common specification, or diameter and numerical aperture according to the individually designed non-generic specification of system requirements doubly clad optical fiber.
It addition, described optical focusing system 4 comprises one or more sphere or non-spherical lens.
Laser energy sources 1 launches the laser energy for laser machining, the laser energy launched is coupled in fibre core and the covering of double clad energy-transmission optic fibre 3 by optical coupling system 2 in certain light splitting ratio respectively, laser energy is via after double clad energy-transmission optic fibre transmission to correct position, focused to suitable spot size by optical focusing system 4, implement Laser Processing.
Optical system realizes laser energy and is coupled into fibre core and the inner cladding of double clad energy-transmission optic fibre 3 respectively by a certain percentage, and focuses to different spot size via optical focusing system 4.
Further, the numerical aperture of the fibre core of described double clad energy-transmission optic fibre 3 is less, and the numerical aperture of inner cladding is bigger.
Referring to Fig. 3, described laser energy sources 1 adopts the semiconductor laser of optical fiber coupling output, but being not limited to this kind of laser instrument, the laser of laser energy sources output collimates through the collimating lens 201 of described optical coupling system 2, and Fig. 3 is the hot spot cross sectional shape after collimated lens 201.
Laser after collimating lens 201 collimates is intercepted a part of light and translates by the prism 202 of described optical coupling system 2, obtains the hot spot cross sectional shape shown in Fig. 4.
Laser focusing through prism 202 is coupled into double clad energy-transmission optic fibre 3 by the condenser lens 203 of described optical coupling system 2, it is in the angle of divergence after line focus lens 203 focus on of the laser energy within the scope of former circular light spot shown in Fig. 3 less, it is coupled into the fibre core of double clad energy-transmission optic fibre 3, intercept the laser energy translating and the exceeding former circular light spot scope angle of divergence after line focus lens 203 focus on through prism 202 relatively big, be coupled into the inner cladding of double clad energy-transmission optic fibre 3.
Described double clad energy-transmission optic fibre 3 will be coupled into two parts Laser Transmission exit end to double clad energy-transmission optic fibre 3 of fibre core and covering.
The laser that double clad energy-transmission optic fibre 3 exports is focused by described optical focusing system 4.
In the fibre core of described double clad energy-transmission optic fibre 3, the laser energy of transmission is bigger, focal beam spot is less, workpiece is processed by the main light source as Laser Processing, in the inner cladding of double clad energy-transmission optic fibre 3, the laser energy of transmission is less, focal beam spot is bigger, as the auxiliary thermal source of Laser Processing, it is used for improving process velocity, improving processing effect.
By changing size and the angles of described prism 202, it is possible to regulate the energy allocation proportion of the laser of fibre core and the inner cladding being coupled into double clad energy-transmission optic fibre 3, the adjustment for laser processing technology parameter provides motility.
Referring to Fig. 5, it is a preferred embodiment of optical coupling system 2 of the present invention, illustrates and how to be coupled into by a certain percentage in fibre core and the inner cladding of double clad energy-transmission optic fibre 3 by laser energy through axis mutually perpendicular two post lens 201,202.
Further, laser energy sources 1 adopts the semiconductor laser of optical fiber coupling output but is not limited to this kind of laser instrument.
The laser of laser energy sources 1 output is assembled by the post lens 201 of described optical coupling system 2 on the direction be perpendicular to drawing, and the laser of laser energy sources 1 output is assembled by the post lens 202 of described optical coupling system 2 on the direction be parallel to drawing.
Referring to Fig. 6, it show the light spot shape on the incident end face place cross section of described double clad energy-transmission optic fibre 3, and hot spot is ellipticity, and major part energy concentrates on fibre core 31 region, and fraction Energy distribution is in inner cladding region. By regulating the optical parametric of cylindrical mirror 201 and cylindrical mirror 202, the light spot shape at double clad energy-transmission optic fibre 3 incident end face place, spot size and beam divergence angle can be regulated, it is possible to so adjust be coupled into the fibre core 31 of double clad energy-transmission optic fibre 3 and the energy proportion of inner cladding 32.
Claims (7)
1. the optical delivery method for Materialbearbeitung mit Laserlicht, carry out converting and focusing on via a beam coupling system by the laser beam that laser energy sources exports, and the size of focal spot and the angle of divergence are controlled, this laser beam is divided into two parts the fibre core and inner cladding that are coupled into double clad energy-transmission optic fibre respectively; By double clad energy-transmission optic fibre by Laser energy transmission to processing stand; The laser energy transmitted by above-mentioned energy-transmission optic fibre focuses to machined surface via an optical focusing system.
2. the optical delivery method for Materialbearbeitung mit Laserlicht as claimed in claim 1, it is characterized in that, described double clad energy-transmission optic fibre transmits two bundle laser simultaneously, the energy of the fibre core transmission major part of described double clad energy-transmission optic fibre, this portion of energy as Laser Processing main heating source, machined material is cut, welding procedure process;The energy of the inner cladding transmission smaller portions of described double clad energy-transmission optic fibre, this portion of energy is as the auxiliary thermal source of Laser Processing, to improve processing effect.
3., for an optical transmission system for Materialbearbeitung mit Laserlicht, it is characterized in that, include successively: laser energy sources, optical coupling system, double clad energy-transmission optic fibre and optical focusing system; Laser energy sources provides the laser energy required for materials processing, laser energy is coupled into fibre core and the inner cladding of double clad energy-transmission optic fibre by optical coupling system by a certain percentage respectively, double clad energy-transmission optic fibre is by Laser energy transmission to optical focusing system, and the laser energy of fibre core and inner cladding is focused to different spot sizes by optical focusing system respectively.
4. the optical transmission system for Materialbearbeitung mit Laserlicht as claimed in claim 3, it is characterized in that, described optical coupling system is the ordinary optical imaging system comprising one or more spherical lens, or including a collimating lens, a light beam biasing prism and a condenser lens, or including orthogonal two cylindrical mirrors of axis, or include a coquille and a cylindrical mirror.
5. the optical transmission system for Materialbearbeitung mit Laserlicht as claimed in claim 3, it is characterized in that, the described double clad passive fiber that double clad energy-transmission optic fibre is common specification, or the doubly clad optical fiber that diameter and numerical aperture are according to the individually designed non-generic specification of system requirements.
6. the optical transmission system for Materialbearbeitung mit Laserlicht as claimed in claim 3, is characterized in that, the numerical aperture of the fibre core of described double clad energy-transmission optic fibre is less than the numerical aperture of inner cladding.
7. the optical transmission system for Materialbearbeitung mit Laserlicht as claimed in claim 3, is characterized in that, described optical focusing system comprises one or more sphere or non-spherical lens.
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| CN201310196782.6A CN103252575B (en) | 2013-05-23 | 2013-05-23 | A kind of optical delivery method and system for Materialbearbeitung mit Laserlicht |
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| DE102015207279A1 (en) * | 2015-04-22 | 2016-10-27 | Ipg Laser Gmbh | Joining device and joining method |
| JP2019101377A (en) * | 2017-12-08 | 2019-06-24 | 株式会社島津製作所 | Fiber output type laser device |
| CN110529135A (en) * | 2018-05-23 | 2019-12-03 | 中铁高新工业股份有限公司 | A kind of new pattern laser broken rock mode TBM |
| CN113649689A (en) * | 2020-05-12 | 2021-11-16 | 深圳市联赢激光股份有限公司 | Optical system |
| CN113649690A (en) * | 2020-05-12 | 2021-11-16 | 深圳市联赢激光股份有限公司 | Optical system with circular and annular light spot cutting function |
| CN112558229B (en) * | 2020-12-11 | 2023-02-03 | 浙江奥智光电科技有限公司 | Technological manufacturing method of high-precision optical fiber focuser |
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| DE4200587C1 (en) * | 1992-01-11 | 1993-04-01 | Schott Glaswerke, 6500 Mainz, De | Light wave applicator for cutting and coagulating biological tissue - applies laser beam via flexible optical fibre having non-constant refractive index profile along its cross=section |
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