Study the Effect of Many Parameters on the Speed of Drilling Materials by Laser Beam
The speed of drilling depends on different parameters such as power, material, time, distance between drilling tool and the material, the drilling tool, etc. In this paper; the laser beam was used as drilling tool. Two types of lasers were used; CO2 laser (10.6μm & 25W) and pulse Nd:YAG laser (1...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2012-06-01
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| Series: | Engineering and Technology Journal |
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| Online Access: | https://etj.uotechnology.edu.iq/article_57239_4d9e44c358cfed982a8d87aebfdb11d8.pdf |
| Summary: | The speed of drilling depends on different parameters such as power, material, time, distance between drilling tool and the material, the drilling tool, etc. In this paper; the laser beam was used as drilling tool. Two types of lasers were used; CO2 laser (10.6μm & 25W) and pulse Nd:YAG laser (1st harmonic 1064nm & 2nd harmonic 532nm, 1J). Two different materials were used; pure silver (0.4mm thickness) and beech wood (3mm thickness). The distance between laser beam and the material was 10cm for CO2 laser and 6.5cm for Nd:YAG laser. Theoretically the melting point of wood is 9345.8 °C. But when reaching the temperature of 300 °C, the auto ignition property will ignite the wood, even in a vacuum. The melting point of pure silver is 961oC. Nor CO2 laser neither Nd:YAG laser could not drill silver even at maximum power for them, but its surface was affected by Nd:YAG laser, where the affected zone color changed. Different powers for CO2 laser were used for different intervals, increasing power increasing drilling speed, zone width and depth. The affected zone of wood by 2nd harmonic Nd:YAG was clear more than that affected by CO2, the CO2 laser would burn it. Many figures which representing the relations between laser power, hole width, hole depth and drilling speed were obtained by using Matlab 2008 software program |
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| ISSN: | 1681-6900 2412-0758 |