インサート材を用いた Al 合金/CFRP 摩擦重ね点接合における継手強度に及ぼす接合温度の影響

抄録

This study aims to solve effector of coupling’s tensile strength and temperature measurement on tip of tool. This joining produce friction heat by pushing spinning tool to Al alloy, and adhere insert material into Al alloy and CFRP by friction heat and plunging force. This joining use tool made of SKD61. Tool’s diameter is 12mm. Tool’s rotating speed is 750rpm. Tool’s indentation speed is 5.0mm/min. Tool’s indentation hold time is 5.0s. Sample materials are Al alloy(A5052-H34) and CFRP. Insert material is Polyethylene terephthalate(PET). PET is held by Al alloy and CFRP, and pushed by spinning tool from Al alloy side. Tensile shear test is conducted in the atmosphere. Cross head speed is 0.5mm/min. Use load cell in plunging load measurement. Establish thermocouple into hollow tool, and use in temperature measurement. As a result of measurement, identified that coupling’s tensile strength increase by joining area’s size and indentation force’s volume. PET’s molten state is affect to tensile strength because temperature occurred by joining isn’t over PET’s melting temperature in 0.3mm and 0.5 mm.