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Photochemical machining is only applicable to corrosive materials, such as plasma processing is hard to process some of the high melting point materials. The impact of laser precision machining quality factors, high precision, in normal circumstances are better than other traditional processing methods. Processing cycle from the point of view, the EDM tool electrode accuracy requirements, loss, longer processing cycle; ECM processing cavity, the surface of the cathode mold design capacity, the manufacturing cycle is very long; photochemical processing operations complex; laser precision machining operation is simple, kerf width to facilitate the regulation and control, processing speed, the processing cycle is shorter than other methods. Laser precision machining is a non-contact processing, there is no mechanical force. If the power of Laser Pointers is focusable.
EDM, plasma arc processing, the heat affected zone and the deformation is small, and thus able to process very small parts. In summary, laser precision machining technology has many advantages than the traditional processing methods, and its very broad application prospects. Introduction of the commonly used laser precision machining equipment. Generally used for precision machining lasers: CO2 lasers, YAG lasers, copper vapor lasers, excimer laser and CO laser, its laser characteristics detailed in literature [6,8,12-16]. High-power CO2 lasers and high-power YAG lasers in the large-scale laser processing technology to a wider application; copper vapor lasers and excimer lasers in laser micromachining technology, used more often. Or the power of portable laser can be focused by rotating the laser head.
, Low-power YAG lasers are generally used for precision machining. Precision laser processing applications and domestic and international profile. As technology advances, the traditional method of punching in a number of occasions can not meet demand. For example, in the hard tungsten carbide processing tens of microns diameter holes; few hundred microns in diameter deep hole machining hard and brittle red, sapphire, etc., can not be achieved using conventional machining methods. The instantaneous power density of the laser beam up to 108 W/cm2, in a short period of time the material is heated to the melting point or boiling point, punch in the above-mentioned materials. With the electron beam, electrolysis, EDM and mechanical punching, laser drilling quality, high repetition accuracy, versatility, high efficiency, low cost and comprehensive technical and economic benefits are significant. The laser head of portable laser can be rotated.
Abroad has reached a high level in laser precision punch. A Swiss company to use solid-state lasers to punch aircraft turbine blades can be processed from 20μm to 80μm in diameter porous, and its diameter and depth of up to 1:80. The laser beam can also be shaped hole in brittle materials such as ceramic processing a variety of small, such as blind holes, square holes, etc., which can not be done by ordinary machining. Laser cutting. Compared with the conventional cutting, laser cutting has many advantages. For example, it can open a narrow incision, almost no cutting residue, small heat affected zone, cutting the noise, and can save the material from 15% to 30%. The laser cap of portable laser is at the very front of the laser pointer.
Laser does not produce the material being cut almost mechanical momentum and pressure, it is suitable for cutting glass, ceramics and semiconductors and other hard and brittle materials, coupled with a small laser spot, cut slit narrow, it is particularly suitable for small parts for each kinds of precision cutting. Switzerland, a solid-state lasers for precision cutting, dimensional accuracy has reached a high level. A typical application of laser cutting is cutting the printed circuit board PCB (Printed circuits Boards) in the surface mount template (SMT stencil). Traditional SMT template processing methods is a chemical etching method, its fatal flaw is the processing limits of a size not less than the thickness, and the complicated process of chemical etching, the processing cycle length, the corrosive medium pollution of the environment. Adjust the laser head of portable laser very carefully and accurately.