An Experimental Investigation of Dynamic Behavior of Arc Sensor in GMA Welding in Short-Circuit Transfer Mode(Physics, Process, Instrument & Measurements)

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In the present paper, the authors used a specially designed torch vibration device to investigate experimentally the dynamic characteristics of an arc sensor in welding in a short-circuiting transfer mode. The results revealed that it may be better to use the characteristic parameters Itc (current value at the instant of arc coming into short-circuit due to a droplet liquid bridge) and f_s (the frequency of short-circuiting) for an arc sensor in this mode. The effects of the frequency and the amplitude of torch height variation on the response of I_<tc> and f_s were also investigated. The results showed that the highest response of I_<tc> and f_s can be obtained at around 3Hz but the sensitivities of both decrease with the increase of the amplitude of the torch height variation.
大阪大学の論文