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Laser processing characteristics and influencing factors of laser processing

Laser processing is the most commonly used application of laser systems. According to the mechanism of interaction between laser beam and material, it can be roughly divided into two categories: laser thermal processing and photochemical reaction processing.

From the current technology point of view, the main features of laser processing technology are:

① Good focusing performance, concentrated energy, small heat-affected area, and high processing accuracy;
② Non-contact processing, no pollution to the workpiece, and no mechanical extrusion or mechanical stress to the processed materials;
③High degree of automation, saving labor costs;
④No mold required, suitable for processing large workpieces;
⑤ It is not limited by the processing quantity and can be put into mass processing and production;
⑥Using computer programming, the processing is precise, the material utilization rate is high, and the production cost is reduced;
⑦ Good adaptability, it can work in the atmosphere or in a vacuum environment;
⑧ No inertia in processing and fast processing speed;
⑨Wide processing range, high power density, and can process almost any material.

There are four main categories of factors that affect laser processing performance:

① Laser characteristics. Continuous output mode/pulse mode, wavelength, power, pulse frequency and duty cycle, etc.;
②Lens parameters. The shape of the lens affects the focal distance, which in turn affects the size and depth of the laser action area;
③The characteristics of the processing material itself, mainly including the oxidation characteristics of the material, melting point, specific heat capacity, etc.;
④Other factors. Such as oxygen supply speed, air flow pressure, etc.

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