A study of an arc sensor model for gas metal arc welding with rotating arc- Part 2: simulation of an arc sensor in mechanically rotating gas metal arc welding
Ch. Kim et Sj. Na, A study of an arc sensor model for gas metal arc welding with rotating arc- Part 2: simulation of an arc sensor in mechanically rotating gas metal arc welding, P I MEC E B, 215(9), 2001, pp. 1281-1288
Citations number
20
Categorie Soggetti
Engineering Management /General
Journal title
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
The high-speed rotating arc process forms a flat bead surface and decreased
penetration depth. It can be effectively applied to automatic seam trackin
g, because the sensitivity of this type of arc sensor is greater than that
of the conventional torch weaving method. In this study, a new rotation mec
hanism was developed by using a hollow shaft motor designed to be installed
in the electrode nozzle. By rotating the welding arc, the amplitude of the
current waveform increases remarkably since self-regulation of the arc is
not fully performed. This paper presents a mathematical model for the dynam
ic behaviour of the electrode melting rate and arc length to simulate the w
elding signals in rotating arc welding. A simplified weld pool shape is con
sidered with the dynamic wire melting model, because the welding arc rotate
s above the preformed weld pool.