TIG 溶接アーク音特性におよぼす電流波形の影響 : 溶接アーク音に関する研究(第 3 報)

概要

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Investigations have been made of the effects of the rectangle, sawtooth, triangle and sine current waveforms on the welding arc sound of TIG arc, that is a stationary arc on the water cooled copper plate, by means of a transistor control type power source. The experimental results have indicated that the welding arc sound depends on the current waveform, repetition frequency f_p and amplitude τ_p. The welding arc sound is composed of a fundamental tone which has a frequency spectrum of f_p and its harmonics. An excellent frequency spectrum f_<EX> agrees with f_p in the triangle and sine wave current, but f_<EX> changes to higher harmonic in the rectangle and sawtooth wave current. The effective sound pressure P_e is shown as a function of f_p and τ_p (P_e∝f_p^m・τ_p^n), and the useful equations which are possible to estimate the noise level have been obtained.
社団法人溶接学会の論文
1980-01-05