Laser mark cuts visit close

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Undertake laser mark cut treatment to tool, workpiece and component, have the applied advantage of a lot of respects. Means of this kind of treatment can produce the mark with long constant to engrave the surface, its craft is agile and diversiform, not only on the safe side, and very environmental protection; It can be not only on the object with planar, curved surface and unusual appearance do a job with skill and ease, and suit to be in all sorts of differring material, use on the material that cuts treatment to may cause damaged in other mark even. Stimulating cursor to engrave is a kind of hot-working method that is not contact, the quantity of heat that it produces according to stimulating place of beam of light destroys the partial data of workpiece surface. Just as its name implies, from " laser, laser " the original meaning of word of this English abbreviate (Light Amplification By Stimulated Emission Of Radiation, suffer stimulate amplifier of radiation type smooth frequency) knowable, the form that stimulates beam of light with high strenth will absorb and launch energy, then launch laser realize smooth frequency to magnify. All sorts of laser systems include some kind to suffer stimulate medium, the atom of this kind of medium can be aroused and generation gives off light oneself. Suffer stimulating medium can be some kind of gas mixture -- for instance carbon dioxide or helium neon gas; Can be semiconductor base material -- for instance laser diode; Can be liquid dye laser; Also can be some kind of crystal -- for instance neodymium - yttric aluminous garnet (Nd:YAG) , neodymium - fluorine changes yttric lithium crystal (Nd:YLF) or ruby. Laser still has a kind of excitation energy that calls pump riverside to estimate a source, also namely the atom of medium. Pump riverside source works with discharge means normally, use the illuminant of high strenth or the beam of light that come from other laser. Solid neodymium - laser of yttric aluminous garnet can be in the mark of all sorts of metals and metalloid material is used in quarter treatment, and use mark of control of beam of light laser to engrave normally. The laser hairdo that these laser mark engrave a system to be able to make shoot these material surfaces gives birth to deflexion, be just like is plumbic stroke like going up in paper. Different point depends on, what pencil place piles up is lead, and the data that high strenth laser destroys workpiece, form the picture that has certain contrast thereby. The effect that systematic control asks to achieve, control of beam of light neodymium - mark of laser of yttric aluminous garnet engraved a system to offer a variety of hot reaction to control means to be chosen for handlers, can use a hand to move an operation already, also can use the computer to undertake controlling. Through increase or reducing the electric current of krypton arc lamp, can adjust the power that laser outputs. As voltaic change, laser output power and gain rate also can produce change accordingly. Neodymium - the composition of system of laser of yttric aluminous garnet. Once build certain smooth frequency with incentive lamp electric current,magnify after gross, operation personnel can adjust with Q switch the pulse frequency of laser. Q switch breaks up laser output effectively into pulse beam of light. Understand the optimal way of this one phenomenon, be regard Q switch laser as " optical capacitor " . The energy of laser gets storing between each pulse that does not shoot beam of light, this and capacitor are very similar. If use the pulse type laser of Q switch, so the energy that the majority included to store in the pulse beam of light of output. If set pulse frequency,be low frequency (1kHz) , time charges to grow between photograph adjacent pulse, the power of peak value pulse that produces consequently is quite high, and pulse width is very narrow (it is 100 nanosecond) about. If increase pulse frequency 10 KHz, shorten as a result of what time charges between photograph adjacent pulse and reduced peak value power. The peak value pulse of low frequency, high-power can raise the temperature of expensive work surface quickly, material immediateness evaporates with respect to aerification, only and few quantity of heat conducts the interior of the spare parts. Laser pulse frequency is taller, the peak value power of generation is lower; Such word, if material produces aerification phenomenon, can form more heat to conduct. Meanwhile, be in inside calm time, if have more pulse, so the heat that machines the surface is conducted also can rise. The pulse frequency of Q switch may be the control variable with the most serious hot work. Pulse frequency can follow the change that stimulates photocurrent, implementation hand is moved or the function of partial programmed control. After the output power when laser and the electric current that arouse light and pulse frequency photograph match, the floating rate that handlers must determine beam of light -- namely the rate that mark cuts. The avery kind of below ideal condition produces application, need to move with the oldest rate, in order to obtain top yield. And engrave to laser mark for, the floating rate of beam of light is another of hot-working important variable, must try to be installed correctly, in order to achieve the treatment result of the requirement. The typical deepness that deepness mark engraves is in 0.

002 inches of above, go up each when must shoot mark reticle with many laser pulse a little bit, ability achieves needs treatment deepness. For this, must lower the advancing rate that surges beam of light. If need to undertake low bid is engraved, can increase floating rate, and even the maximum that reachs a system. Right now, value of pulse frequency set will appear corresponding thermal diffusion sex, final bid engraves the effect to cannot achieve beautiful requirement possibly. General applied regulation is, laser pulse should have the jackknife rate of 50% at least, just be met form a successive mark reticle by treatment surface. By Telesis Technologies company (network address: Www.

Telesis.

The Express10EV laser system that Com) place develops (see figure above) , the fine writing of high resolution can be carved on tall reflex silicon chip. Material element neodymium - all sorts of laser of yttric aluminous garnet can be compatible stimulating cursor cuts material. The characteristic meeting of certain material affects mark to cut the result of treatment, these character include the reflectivity, color that absorbs characteristic, thermal conductivity, workpiece and appearance bright and clean degree. Laser must be absorbed, ability produces quantity of heat. If be opposite by the material of treatment,laser has very strong reflection sex, increase the power of laser with respect to need, reduce pulse frequency, gain higher peak value power thereby. Additional, return the rate that can lower beam of light to move. To glancing sexual material, the likelihood cannot undertake mark cuts treatment at all. Most metallic stuff can absorb neodymium - laser of yttric aluminous garnet, its wavelengh is 1.

06 millimeter, undertake mark cuts treatment very easily consequently. Reflection sex of gold is very strong, need consequently more the laser of high-power. Some organic material (for instance lumber is mixed paper) , almost can 100% reflex lines, accordingly cannot mark is engraved. The sort of laser is sealed model carbon dioxide laser: Use the surface to become angry means, mark cuts cost inferior. Apply to lacquer of plastic, coating, printing ink, pottery and porcelain and other metalloid material. Laser of Stab carbon dioxide: Apply to the deep-seated nap of metalloid material surface. Neodymium of diode pump riverside - laser of solid of yttric aluminous garnet (DPSS) : Quality of beam of light is high, pulse stability is good. The deepness that applies to petty word appears vulture. Neodymium of pulse mix into - laser of yttric aluminous garnet: Power of very high peak value pulse, usable at deepness mark is engraved and wide cut mark is engraved. Neodymium of 3 times frequency - laser of yttric aluminous garnet: Belong to ultraviolet wave band, what can produce small carve place to need is the narrowest the line is broad; Have the optimum wavelengh that place of a variety of special type stuff need. Duple frequency neodymium - laser of yttric aluminous garnet: Belong to wave band of green visible light, apply to the small character sculpture with wide filament; Most apply to a variety of gold, synthesis material and plastic. Q switch neodymium - laser of yttric aluminous garnet: Peak value power is high, pulse width is narrow, apply to deepness to appear vulture / sculpture. Most apply to most metal material and a lot of metalloid material. If be put in the problem of reflectivity, the label that uses place of duple frequency laser to obtain cuts the result betterer. The wavelengh of this kind of laser is 532 accept rice, belong to green visible light. Use wavelengh for 10.

6 micron (the area outside Yuan Gong) mark of carbon dioxide laser engraves a system, also can get satisfactory result. The absorptivity of all sorts of material follows temperature and produce change. Because stimulate cursor to cut a course the exterior temperature of can elevatory material, consequently absorptivity submits the data that increases significantly, cannot undertake mark cuts treatment possibly. Say for example, some are plastic have steeper absorptivity - temperature curve, consequently almost unavailable beautiful mark cuts the result. Stimulate firm illuminate of beam of light to arrive on these material, exterior temperature and absorptivity of quantity of heat rose quickly. Worse is, because these material drew much energy, temperature lifts quickly, rise what cause absorptivity of quantity of heat consequently further. Need a short while time of millisecond class only, these material produced aerification to evaporate. If reduce the power of laser, try compensation and control treatment process, make quantity of heat cannot be absorbed adequately likely, realize the control of pair of initiative temperature rise, plastic won't produce marked change to the illuminate of laser. If the problem becomes severe, the neodymium that can choose duple frequency - laser of yttric aluminous garnet or carbon dioxide laser, in order to obtain more easily pilot absorptivity - temperature curve. The data with strong thermal conductivity is not entirely to cannot undertake laser mark engrave, the difficulty that just achieves requirement result is a few greater. Must the parameter of appropriate adjustment laser, in order to compensate material oneself " medicinal powder hot " problem. CNC Milling