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The laser beam is highly concentrated in space and time, and with the use of lens focusing, the spot diameter can be reduced to the micron level to obtain a laser power density of 105-1015W/cm2. Such a high power density can be implemented in almost any material laser perforation, and compared with other methods such as mechanical drilling, EDM and other conventional perforation means, has the following significant advantages.
Laser drilling speed, high efficiency, economic benefits. Because laser punching is the use of power density of l07-109W/cm2 of high-energy laser beam on the material for instantaneous action, the action time is only 10-3-10-5s, so the laser drilling speed is very fast. By combining the high performance laser with high precision machine tools and control system, and program control by microprocessor, high efficiency punching can be realized. Compared with EDM punching and mechanical drilling, laser punching on different workpieces is l0-1000 times more efficient.
Advantages of laser drilling machine compared with traditional punching process: laser punching is fast, efficient and economical; laser punching can obtain large depth to diameter ratio; laser punching can be done on various materials such as hard, brittle and soft; laser punching has no tool loss.
Laser drilling is suitable for group hole processing with large quantity and high density; small holes can be processed on the inclined surface of difficult materials with laser; laser punching has simple requirements for workpiece clamping and is easy to realize on-line and automation on production line; laser punching is easy to punch complex-shaped parts and can also be punched in vacuum.
Laser drilling without consumables saves the cost of making, maintaining and replacing molds. It can punch holes on irregular planes such as inclined surfaces, concave and convex surfaces, and diamond-shaped surfaces without burr, pollution or deformation, and the workpiece is smooth and beautiful after processing, eliminating the need for reworking processes such as removing burrs, correction and grinding, and greatly improving efficiency.
