Stability evaluation of laser-pulsed MIG hybrid welding process based on MATLAB

Since the stability of welding process is directly related to welding quality, and the larger number of electrical signals collected during laser-pulsed MIG hybrid welding are difficult to extract valid data rapidly, a method based on MATLAB to evaluate the stability of laser-pulsed MIG hybrid welding process is proposed in this paper. The current cycle T with average and standard deviation was considered to estimate the cycliticy of welding process, the difference value d between peak current and base current with average and standard deviation was considered to estimate the volatility of welding process respectively, combining with two aspects to above evaluate the stability of welding process comprehensively. To verify the reliability of the method proposed in this paper, four groups of laser-pulsed MIG hybrid welding experiments were carried out. The analysis results with current wave form, arc shape, droplets transfer characteristics and welds appearance of test were consistent with the results by using the method put forward in this paper. The evaluation method proposed in this paper is proved to be effective and reliable.