超音波振動による FRP ねじの転造 : 基礎実験

概要

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Fiber reinforced plastics (FRP) has been increasingly applied in every field of camera, aerospace and vehicle industries and so on because of its light weight, chemical and corrosion resistance electrical insulation and its high mechanical properties after all. In that line, some studies on rolling of glass-fiber reinforced plastics (GRP) thread have been done. However, the results have a lot of problems concerning accuracy of thread profile, surface finish and strength. As a new attempt, rolling of FRP thread with ultrasonic vibration is proposed in this paper. As a fundamental experiment, indentation forming of M 10 thread profile is tried by ultrasonically vibrated tool with 3 kinds of thermoplastic materials in order to confirm the possibility of rolling of plastics thread. The obtained conclusions are as followings. (1) Ultrasonic vibration is effective for indentation forming of thermoplastics and GRP. (2) For the indentation forming, an optimum amplitude of vibration exists, dependent on the physical properties of materials. (3) Consequently, rolling of FRP thread is expected to be possible.
公益社団法人精密工学会の論文
1988-09-05