Citation:
N. Pepe, S. Egerland, P.A. Colegrove, D. Yapp, A. Leonhartsberger, A. Scotti, Measuring the process efficiency of controlled gas metal arc welding processes, Science and Technology of Welding & Joining, Volume 16, Number 5, July 2011 , Pages 412-417.
Abstract:
The thermal or process efficiency in gas metal arc welding (GMAW) is a crucial
input to numerical models of the process and requires the use of an accurate
welding calorimeter. In this paper, the authors compare a liquid nitrogen
calorimeter with an insulated box calorimeter for measuring the process
efficiency of Fronius cold metal transfer, Lincoln surface tension transfer and
RapidArc, Kemppi FastRoot and standard pulsed GMAW. All of the controlled dip
transfer processes had a process efficiency of ∼85% when measured with the
liquid nitrogen calorimeter. This value was slightly higher when welding in a
groove and slightly lower for the RapidArc and pulsed GMAW. The efficiency
measured with the insulated box calorimeter was slightly lower, but it had the
advantage of a much smaller random erro