Behaviour of short-circuit frequency and duration time and electrical conductivity during arc re-ignition in SMAW (AC) with E6013 electrodes

Abstract

The objective of this work is to evaluate the behaviour of short-circuit frequency and duration time and electrical conductivity during arc re-ignition in the shielded metal arc welding process with alternating current and E6013 electrodes. The non-parametric statistical analysis guarantees robust processing of the data, reducing the influence of atypical values and errors derived from the use of approximations to well-known continuous distributions. The median and the median absolute deviation (MAD) with respect to the median of the data are the localization and dispersion estimators used, respectively. The electrode set at 160 A shows a better stability in metal transference, given for the lowest value of MAD for the short-circuit period (39.36 ms), and the MAD of the short-circuit duration (1.43 ms), according to the presence of a major electrical conductivity during the arc re-ignition (1766.17 × 10^− 3 S s^− 1).

Keywords:

• SMAW
• electric parameters
• statistical analysis
• robust processing
• behaviour
• E6013

Notes

^1. [email protected]

Additional information

Notes on contributors

Carlos René Gómez Pérez

1. 1. [email protected]