Study on the Measuring of Fume Density Produced by Arc Welding (1st Report)

Abstract

It is said that fume produced during arc welding is harmful for human body, but there has been no simple and easy method to measure fume density in welding shop.
An experiment was performed in order to obtain the relationship between filter paper method which is direct measuring method and indication of digital dust indicator which is indirect measuring method.
The, results of the experiment are as follows:
(1) There is a constant relationship between value of fume density obtained by filter paper method and indication of digital dust indicator.
(2) It is possible to obtain the same accurate value of welding fume density as that to be obtained by filter paper method by multiplying, by the'correction factor 2, the corresponding value measured with digital dust indicator of welding fume, produced from either the electrode or the weldment.
(3) The indication of digital dust indicator is not affected by difference between reflections of fumes.
(4) The digital dust indicator is suitable as a simple and easy measuring method in welding shop.