炭素繊維強化樹脂のピコ秒パルスレーザー加工

Picosecond pulse laser processing of carbon fiber reinforced resin

小菅 淳  

Kosuge, Atsushi

炭素繊維強化プラスチックは、軽量,高強度,高剛性などの特徴を持った高性能繊維の炭素繊維により強化された樹脂系複合材料である。熱可塑性樹脂を用いたCFRTPは、成形時間が短く経済性に優れ、熱可塑性樹脂は熱を加えると溶けるためリサイクルが可能である。一方で、CFRP, CFRTPは、加工が難しい難加工材料として知られており、レーザー加工において、レーザーが照射されると樹脂が蒸発し炭素繊維が剥き出しになる熱影響領域が発生してしまう。この熱影響領域がCFRP, CFRTPの強度を低下させる懸念があるため、近年、この熱影響領域を小さく抑える加工条件を見つけることが重要な課題となっており、本研究では熱の影響の少ない加工条件の探索を行う。

Carbon fiber reinforced plastic is a resin-based composite material reinforced with carbon fiber, which is a high-performance fiber having features such as light weight, high strength, and high rigidity. CFRTP using a thermoplastic resin has a short molding time and is excellent in economy, and the thermoplastic resin melts when heat is applied, so that it can be recycled. On the other hand, CFRP and CFRTP are known as difficult-to-process materials that are difficult to process, and in laser processing, a heat-affected region is generated in which the resin evaporates and carbon fibers are exposed when irradiated with a laser. Since there is a concern that this heat-affected zone will reduce the strength of CFRP and CFRTP, it has become an important issue in recent years to find processing conditions that keep this heat-affected zone small. Search for conditions.