The applied general situation that careful laser industry machines

If pursue,1 is shown. The development of flying second laser is quite rapid. In a few years of in the past, great majority exceeds the attention of fast laser manufacturer to be centered in the earth of research and development of flying second laser. But, the repetition of flying second laser frequency is not tall, have thousands of hertz only commonly, for the modern industry treatment of this taller to pursuit work efficiency very adverse. And compare with flying second laser, the leather second laser that repeats frequency to achieve hundreds of kilohertz to this can assure tall productivity however. Accordingly, flying second laser basically applies at scientific research domain at present, and leather second laser criterion applicable machines a domain at industry. Because the strong plasma of tall pulse energy can be formed in material purify process, because this industry machined fast to exceeding laser to raise taller requirement, the parameter ability that how installs laser namely achieves idealer material purify result. A large number of experiments make clear, below reasonable purify rate, highest precision can be 6-10 through installing power density the threshold values of times exceeds the implementation below short laser pulse. To the metal character, this means the energy density of 10 Ps pulse to be 1J/cm2. If personal computer fetterses,machine stimulate beam of light to be become by focusing the facula that typical diameter is 10 μ M, so first-rate pulse energy should be 1 μ J. Below this kind of circumstance, the typical cost of the material ply with every laser fused pulse is 10~100 Nm, can machine a precision for 0.

The small structure of 1 μ M. Graph 2 gave out different stuff is right pulse power and the purify rate that repeat frequency. Nextpage3 is ultraviolet treatment of industry of laser beam machining experienced machinery with the machine that make bid - pneumatic - the development process of laser. Current, common laser makes mark machine is system of infra-red laser control more. Is what with Yu Fei the metal makes bid Co: commonly? ?0 of の of ǔ of  of す Hun sole.

6 μ M; and the wavelengh that is used at the metal to make bid is 1 064 Nm commonly or 532 Nm. The odd photon energy that common 1 064 Nm makes mark machine is small, infra-red laser produces thermogenesis through oscillatory material element, make material is dissolved first volatilize again, produce score on material then, this is very adverse to high accuracy treatment. In section of ultraviolet light music, a lot of material have taller linear to absorb coefficient, to material (especially pervious to light material) purify is very advantageous. Ultraviolet process of laser beam machining is called " smooth corrode " effect, the photon of high-energy quantity is passed " cold " the chemical bond that processing destroys data directly, what machine the material that come out to have the carbonization of smooth brim and extremely low limit. Accordingly, ultraviolet deep even ultraviolet laser is applied at careful treatment, be accepted extremely easily by people. Additional, a lot of plastic and a few a large number of in using flexible circuit board the special polymer in base material (if get together phthalein inferior amine) cannot pass infra-red processing or " hot " processing process has careful treatment. Because hot meeting makes plastic be out of shape, in the loss that cut brim perhaps produces carbonization form on bore brim, and this may bring about sex of circuit board structure weaken and parasitism conductibility access, bring about thereby must increase sequel to handle working procedure to machine a result in order to improve. Accordingly, infra-red laser is not applied to certain and flexible the processing of circuit. Besides, although be below high energy density, the wavelengh of CO2 laser also cannot be absorbed by copper, this more the scope of application that restricted it. Under photograph comparing, ultraviolet the output wavelengh of laser is in 0.

4 μ M is the following, this is comfortable the main good point at processing polymer material. Differ with infra-red laser beam machining, ultraviolet small processing process comes up from essence saying is not " hot " processing process, however a kind " cold " treatment. Main application domain is as follows: Dozen of small hole of · PCB and flexible cut and the lineation of the semiconductor material such as the silicon chip of solar energy of · of cut; of circuit board and pottery and porcelain, lineation that hit sapphirine of · of mark; subtly and · of cut; the small treatment of medical apparatus and instruments (dozen of mark of woven hose and make the) such as aperture. Current, 2 kinds are obtained ultraviolet the method of laser, one kind is accurate element laser is ultraviolet laser, another kind is solid laser what obtain after times frequency is ultraviolet laser. All the time since, accurate element laser is holding dominant position in violet extra work, but is accurate element laser put in: of a lot of defect?  instrument mires  of  of Dan of  of wine of discharge of apricot of ∮ of the first month of A Chinese-style unlined garment of  of Hun of crowded swollen aurelian す Home Ju hises or her Hun  is tranquil ⒑ of Wa of ⒋ of mother  arc steals Tan Jian of Kun    of 8 Cong Yin M protects  grandma of Jian of Hun of crowded swollen aurelian す awakes, and the energy effect that has 1% only at workpiece surface. Limitative solid is ultraviolet the stability that the main problem that laser big range uses is laser, thirdly layer of film of times frequency crystal appears extremely easily injury. Current, the amount to is not only much company on the world can solve the problem of long-term job stability, most company just still lies right ultraviolet the laboratory research phase of laser. Accordingly, technical measure is to bring about ultraviolet a laser cost is high very main factor. Additional, with Nd:YAG laser is exemple, the 355 Nm that should obtain 10 W is ultraviolet laser, the 808 Nm laser that needs about a hundred tile at least regards pump as Pu Yuan. The cost of original part also is to make ultraviolet one of reasons of laser high cost. 4 last words exceed short pulse and short wavelengh laser the application that processing a domain subtly is wide with each passing day, but still need to deploy high fixed position and the system of digitlization sport control that repeat precision and relevant exterior accessory, ability satisfies the production of tall difficulty and research need. As the ceaseless progress of laser, especially solid is ultraviolet the settlement of laser stability problem, and the craft of equipment of form a complete set develops, this one task will have high accuracy laser beam machining higher value and wider applied perspective. CNC Milling