Advantages Of Laser Drilling
Laser drilling is the first practical laser processing technology and one of the main application in laser processing. For materials with high hardness and high melting point, traditional processing methods cannot meet its requirement. This type machining task is difficult, sometimes impossible, but it’s not difficult for laser drilling. The laser beam is highly concentrated in space and time, and by focusing with a lens, the spot diameter can be reduced to the order of micrometers to obtain a laser power density of 105-1015 W/cm2. Such high power density can be laser-punched in almost any material, and has the following significant advantages over conventional methods, such as mechanical drilling, EDM, etc.:
Laser drilling speed is fast, high efficiency and has good economic efficiency. Since the laser drilling uses a high-energy laser beam with a power density of l07-109W/cm2 to instantaneously act on the material, the action time is only 10-3-10-5 s, so the laser drilling speed is very fast. High-performance lasers can be matched with high-precision machine tools and control systems, and programmed by a microprocessor to achieve high-efficiency punching. Compared with electric spark drilling and mechanical drilling, laser drilling on different workpieces increases efficiency to 10-1000 times.
The material to be processed is irradiated with a high power density laser beam, so that the material is quickly heated to a vaporization temperature and evaporated to form a hole. Laser drilling is the first practical laser processing technology and one of the main application areas of laser processing. It is classified in laser processing as laser removal, also known as evaporation processing.
With the rapid development of modern industry and science and technology, more and more materials with high hardness and high melting point are used, and the traditional processing methods can not meet certain process requirements. Compared with conventional punching methods, it has the following advantages:
1. Laser drilling speed is fast, high efficiency and good economic benefit.
2. Laser drilling can achieve a large depth to diameter ratio.
3. Laser drilling can be carried out on various materials such as hard, brittle and soft.
4. Laser drilling without tool loss.
5. Laser drilling is suitable for a large number of high-density group hole processing.
6. Laser can be used to machine small holes on the inclined surface of difficult-to-machine materials.