Laser Lap Welding of Thermoplastic Plates. 2nd Report. Relation between Energy Flux and Irradiation Time at Limits of Welding.

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  • レーザによる熱可塑性プラスチックのラップ接合　第２報　　接合限界におけるエネルギー流束と照射時間の関係
  • レーザ ニ ヨル ネツ カソセイ プラスチック ノ ラップ セツゴウ ダイ2ホウ セツゴウ ゲンカイ ニ オケル エネルギー リュウソク ト ショウシャ ジカン ノ カンケイ

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Abstract

Relations between the energy flux and the irradiation time at upper and lower limits of laser lap welding of thermoplastic plates are studied theoretically and experimentally. From the dimensional analysis, it came out that the energy flux of the laser is proportional to the heat capacity, the temperature increase, 0.5 power of the thermal diffusivity and -0.5 power of the irradiation time of the laser. From the experimental analysis using PMMA plates of 3 mm in thickness, it is found that the energy flux of the laser at the limits is well correlated with the irradiation time of the laser to the power of -0.7.

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