Machinability and Phenomena in Laser Drilling of Aramid FRP(Electronic Devices)

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概要

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• Recently, the drilling of small hole in FRP is occasionally required. However there are many difficult problems, such as shortened tool life, rough machined surface, some cracks and so on, during drilling by using drill press. And the smaller size of hole is difficult to be drilled by such a traditional procedure. We can find only some papers about laser drilling for FRP plates, especially for AFRP plate. Therefore, we tried to get the smaller size hole with deep depth further the higher quality by using a laser machining that never induces tool wear. In this report, as a first step, we tried to investigate the effect of laser condition on the hole shapes and its appearance. Aramid fiber and glass fiber are chosen as reinforcing materials in the FRP composite and one bundle of those fibers is placed in the polyester. We used the CO_2 laser equipment for drilling and the various kinds of irradiating conditions are employed to investigate the phenomena in machining process. Observing the effect of laser irradiating conditions on the shapes of machined hole quality, we obtained the following results; it is clarified that the maximum diameter of machined hole increases with irradiating time and laser power. And the maximum depth was affected mainly by laser power and by a presence of fibers. The presence of fibers, especially glass fiber, causes difficulty to drill the deeper hole under the conditions of lower laser power and shorter irradiating time. The high quality drilling beyond the fiber bundle is not easy to realize, but HAZ (Heat Affected Zone) is created easily along the bundle of fibers.

• 一般社団法人日本機械学会の論文
• 2001-10-20

著者

• Isogimi Kiyoshi

  Department Of Mech. Engineering Faculty Of Engineering Mie University

• Isogimi Kiyoshi

  Department Of Mechanical Engineering Mie University

• Nakanishi Eitoku

  Department Of Mech. Engineering Faculty Of Engineering Mie University

• MITSUI Akifumi

  Department of Mechanical Engineering, Mie University

• Mitsui Akifumi

  Department Of Mechanical Engineering Mie University

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