The application of fiber-optic laser bore in spaceflight domain

05 millimeter come 0.

The focusing facula dimension of 75 millimeter comes true. Pounding stiletto is to point to laser gives out a bundle or pulse of many bundles of laser, at the same time laser light beam and treatment component keep fixed. Whether to need many bundles of pulse, this is decided by the deepness of the opening that wants treatment. Another type that pounds stiletto is flight bore, it is to use fixed laser to pulse of treatment component lase, treatment component rotates in the meantime. The position of aperture is spent by rotate speed coming back and laser pulse frequency decides, they concern into function. If ask many bundles of pulse, can use relevant software (for example by the CylPerf software of Laserdyne company) will make the motion of the component and laser pulse keep consistent, ensure each bundles of pulse is accurate ground action is asking locally. The design of the aperture that the dimension that can adjust focal length of pulse frequency, camera lens, bore through changing laser pulse energy and taper will come to to satisfy a need asks. Craft of another kind of bore is to come back cut stiletto. Coming back when cutting stiletto, treatment component keeps fixed, at the same time laser light beam moves and form hole through cut appearance. This kind " bore " the application that means uses at undertaking concussion and bore at the same time normally. And super- nicety, can repeat laser location system appear, make us OK undertake this kind of distinctive, essence comes back definitely cut stiletto. The average power of laser is decided by pulse frequency and pulse energy, and power is restricted again by the working cycle of laser, in cycle of this one job the function of laser won't drop. Normally to stroke aperture use <100 covers with tiles the average power to 400 tile. And choice good arteries and veins is wide the quality that can optimize bore. Shorter arteries and veins is wide may restrict sheet bundle pulse realizable is the biggest energy; Wide range of typical arteries and veins is 0.

5~2 Ms. Pulse energy can distinguish bore laser and the laser that use in other treatment type. Higher pulse energy can make bore rate rapidder, but may bring negative effect to the quality of aperture. Generally speaking, the diameter of the opening that requires pulse energy needs by composition of ply of experimental result, material, composition and place will decide. To the laser with specific some, focusing lens will decide facula size. In pounding stiletto, facula size and the diameter that want the hole that drill concern: To weaker data (<0.

5 millimeter) , facula size is equal to the diameter of aperture basically; And increase as metallic ply, the diametical limits of the hole that concussion stiletto can drill narrows gradually. Right now, be turn for come back cut stiletto (graph 2) embark upon a political venture. Go up at aerostat and land in treatment application (generate electricity) laser bore technology is used to already had in turbine motor component about the same history of 45 years. To car engineer, filter stylist and manufacturer of medical treatment equipment, laser bore has made the indispensable vital technology when its machine a component. The fiber-optic laser of Yb of earlier research achievement of fiber-optic laser bore is the most commonly used a kind of when process application at material fiber-optic laser. Original they are to serve as successive wave (CW) laser and be come out by development, later although increased pulse function, but peak value power still keeps consistent with CW average power. This is helpful for cut and solder reinforce using, but the efficiency that limitted laser bore however. Commonly used Nd:YThe peak value power of AG laser bore can amount to 50 kilowatt, and the power of pulse peak value of a lot of application is 20~35 kilowatt commonly. After the lab of IPG Photonics application that is located in city of Oxford of city of equestrian Sa Zhu Sai installed Laserdyne 795 system, people ignited the interest that fiber-optic to Yb laser uses afresh. The experiment proves, with the CW of 20 kilowatt fiber-optic laser undertakes Kong Hexuan cuts stiletto developing stroke, can get the hole with very good quality. This one initial success makes lab of Laserdyne Champlin application installed fiber-optic laser of 15 kilowatt CW Yb again, will be used technically at bore research. Their research aims to get actual drilling to use medium additional data, and determine the size of next needs laser. But application of bore of Yb fiber-optic laser still is put in a serious problem -- the cost of laser. Although fiber-optic laser can bring a lot of profit, but its cost wants tower above 5 times much; This one technology in producing treatment field actually so may won't do. Plan of another kind of equipment choosing is to use accurate successive wave (QCW) laser will machine, its price cost and Nd:YAG laser is same. Range of needs QCW laser dimension can decide through a series of tests. Research conclusion is current the final verdict of the research of this one phase is as follows: Can use with Nd:YThe other and fiber-optic laser with AG laser most adjacent parameter undertakes bore, rise through a series of parameter option crop and / or the quality of aperture. Improve the quality of beam of light of fiber-optic laser, can enhance power density and reduce facula size, can affect metallurgy result greatly thereby. To containing heat barrier coating (the material of TBC) undertakes bore, the result shows statified function gets great improvement. Come back cut stiletto to compare concussion stiletto more economy, and come back it is better that result of the geometry that cuts stiletto, metallurgy should compare latter. Nevertheless, although quality rose, but crop is met however,drop. The speed that pounds stiletto is 1 aperture / second, and with come back cut stiletto to get same Kong Que to need 3 seconds, the speed of flight bore can achieve 3 aperture / second, return the quality that can maintain same hole at the same time. Have such a kind likelihood: The bore parameter that uses unusual plan can get right result. For example, in 1.

45 millimeter get a diameter on thick TBC coating material for 0.

5 millimeter and the hole that becomes 30 ° part with the surface, the sheet that uses 8ms bundle " long " pulse comes bore can come true 0.

The speed of 10 seconds. The QCW laser inside limits of use 9~12 kilowatt can improve the efficiency of bore. In fact, after announcing this to study positive result, the company that a few have laser bore demand had thorough research to this. A lot of companies that these study to let the United States and Europe finally order system of this one laser. Although study the result is heart-stirring, but still a few still treat settlement problem. Among them a the most serious problem is, when undertaking pounding stiletto and flight bore, how to control the dimension of good aperture. This will be research and a part that test an attention below one round. Can read whole report to what this one project is interested. Initiative research is in as a result the following address: HTtp://www.

Primapowerinterface.

Com/fldp/index.

Html, still include the author's frequency among them. The application that studies the result made Laserdyne application lab buy laser of QCW of a 12 kilowatt to last in order to undertake studies. These experiments still afoot, will have a report with similar pattern. Peter Thompson is Prima Power Laserdyne(www.

Primapower.

The CTO of Com) , mark Barry(mark.

Barry@primapower.

Com) is this company sale and mart vice president. CNC Milling CNC Machining