Galvanometric scanning accelerates laser beam machining

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In 20 years of in the past, system of laser beam machining got countless industry apply the favour of the domain, be like, solder, cut, reticle, engraving, bore, and make bid. The fixed position that galvanometric scanning system often is used at making laser facula fast on workpiece and accurate. This kind of system uses the deflexion of laser light beam that realize 2 dimension to be able to accuse to the mirror that can rotate. Laser light beam but by exact location, through acquiring formulary design thereby with beam of light of particular speed reciprocating translation. The controller on scanning head decided the outline that laser facula place takes onefoldly. Compare with traditional plan photograph, because the material treatment of laser used scanning system to bring a lot of advantages: Kinetic function of Gao Shuiping and treatment speed; Disappear wears away besides mechanical tool; Be not osculatory treatment; Small and accurate definitive heats up influence area; Peculiar flexible, beardless rework. Applying laser to make bid is a key application of galvanometric scanning system. The character that indicates with laser has permanent characteristic, in addition, readability is very good, and the use that does not need bad news capable person. The code of period of efficacy that this application includes mount to food or ATM gets stuck and the character on Id is very good choice. Scanning system is in other a lot of domains also got applied, if the material of high accuracy machines a domain, electronic industry (silicon treatment, bore of printed circuit edition) , domain of medical treatment technology (laser ophthalmology operation, scanner of fault of eye ground of be concerned with) , fast manufacturing industry (laser shapes quickly technology, laser agglomeration / melt) , and the laser that uses kilowatt class power undertakes cut perhaps solders. Because be opposite laser power, accuracy and the diverse demand that machine speed, there is many scanning system configuration on the market. Graph 1 gave out the survey that different applying, their requirement, and appropriate scanning head. Graph 1.

According to the need of diverse demand and application, the scanning head that has all sorts of configuration can offer an alternative. If configuration takes no account of applied word, the material treatment system of laser comes up from essence say to depend on the following component: Laser illuminant, plastics of beam of light, fixed position of beam of light, with controller. Still need to use in addition additional the component of specific utility, be like an operating system, image processing, perhaps make equipment into programmed control. Graph 2 gave out unit of main scanning head system, graph the specific description of the 3 focusing lens component that gave out to differ. Graph 2: Contain the laser of scanning head. Focusing makes the same score implementation of field camera lens through F-Theta; VarioCSCAN component makes the focus can locate along Z axis. To focusing, typical is to use special level field lens, namely, f-Theta camera lens, installation goes out in the beam of light of scanning head shoot place. The laser after focusing of this camera lens passes collimation and the seat that does not get looking glass of deflexion of be confined to, and always be after focusing inside a plane. Camera lens of this kind of F-Theta has a lot of different wavelengh and focal length to be able to offer an alternative. Gets elephant grows the 50%-70% that is camera lens focal length normally by the side of field. The camera lens of far heart F-Theta that is used at material small treatment will stimulate the focusing with perpendicular beam of light to be in elephantine field, bian Changdian value is 50mm. Graph 3: Laser light beam passes scanning system focusing (Zun Qi) : Beforehand focusing lens, f-Theta camera lens, dynamic beforehand focusing, and dynamic beforehand focusing and combination of F-Theta camera lens. Jiao Ban's diameter by the focal length F of camera lens, the exterior area that can handle, and the element decision such as the aperture of laser type and scanning head. For the beam of light that distributings to gauss, s of diameter of its Jiao Ban, can calculate through the following formula: Here, λ is laser wavelengh, quality of M2 token beam of light, d is the diameter of beam of light before passing focusing optics system. Light beam of laser of parameter K token perhaps is as a result of bore diameter inside camera lens when the diffractive effect of generation. The power density that to make the focus is in is achieved the biggest, namely, raise treatment rate, width of beam of light must expand to as equal as scanning head aperture. Below this kind of circumstance, k = 1.

83. In a few application, the lenticular system of sudden shift by park scanner front, with will adjust the target that goes up in order to accord with deflexion lens and laser in workpiece nods focal length the distance between. Device of alterable scanning optics is in this kind of VarioSCAN to be able to be used without appropriate F-Theta camera lens when especially useful, grow in diameter of beam of light for example or when elephantine field is bigger, perhaps stimulate in high laser power can use when smooth wavelengh is special. In addition, these VarioSCAN scan changeably optical component can realize three-dimensional treatment inside sweep range, they can be used alone, perhaps use together with F-Theta camera lens. Graph 4: Friendly graphical user interface (GUI) software (company of American Alase Technologies and LaserWare company) offerred user and scanning device control character implement the interface interface between. Contain the DSP Control Panel of memory, its function is to serve as application software, the hardware interface interface between scanning head and laser. These face plate make laser control and scanner shift and image amendatory are finished between implementation is synchronous, in order to ensure the character won't appear by exact location pillow form is lack fidelity and also ensure mark process rate is constant at the same time. To the small treatment of material, can use the special scanning head with kinetic very nice character, fast and cooling electric machinery and / or what electronic facilities will realize long-term drift is the smallest change. The scanning head that is 14mm to bore diameter can be deployed additional detector of high accuracy position uses automatic calibration. Graph 5: The IntelliSCAN 10 of type of total number word in be being used. Technical innovation new material, the occurrence of new laser light source and the progress that produce technology will bring the strong progress of the scanning system that is used at material treatment. Its farther advantage depends on can coming through software the condition parameter of monitoring scanning system, this offerred new possibility with respect to the use that waits for a domain with client support to be diagnosed remotely. The parameter of the position of the scanner and speed can be digitlized to inquire, use in process of the following treatment. CNC Milling CNC Machining