Research On The Interaction Mechanism Between Laser And Pulse MIG Arc Base On Multi-information

Because of the interaction mechanism between laser and arc for the further development of laser hybrid welding was important. Laser + pulsed MIG paraxial hybrid welding system has been built in this paper,By research on this hybrid heat source, the interaction mechanisms between laser and pulse MIG arc could be obtained.As the concentration of laser energy, laser effects on the arc could not distributed throughout the whole arc. Traditional research methods, such as acquisition of electrical signals, high-speed photography method could determine the general characteristics of arc,but different regions of the arc could not be diagnosed by these traditional methods. In order to diagnose different regions of arc before and after laser hybrid. A "point" acquisition strategy has been presented in this paper. Spectral information of different point in arc area could be collected by this strategy. To achieve this strategy, a small hole detector has been developed in this paper. This device made it possible for the study on interaction mechanism between laser and pulse MIG arc.As the pulsed MIG arc varied periodically,In order to accurately capture the relevant signals of different states arc before and after laser hybrid. Synchronous multi-information collection system has been built in this paper. The electrical signals, high-speed photographs, spectral signals could be collected synchronously by using this system. A guarantee for the research on interaction mechanism between laser and arc has been provided by this system.In this paper, the synchronous multi-information collection system and the hole detector have been used to collect informations of the pulse MIG arc before and after laser hybrid. The synchronization informations of arc have been obtained, through the analysis of thes informations, spatial spectral radiation distributions of base and peak arc before and after laser hybrid have been constructed in this paper. Boltzmann diagram method has been used to calculate the electron temperature of the arc before and after laser hybrid. The spatial distribution of electron temperature has been built.Through the research on the experimental data, the paper found that in the coordinate system which has been built in this paper, the radiation intensity and electron temperature of the peak hybrid arc increased in 0≤X≤2,0≤Y <2 region, radiation intensity and electron temperature of the base hybrid arc increased in 0≤X ≤1,0≤Y≤1 region. An energy distribution model of the hybrid arc has been built in this paper. This model shown that the arc plasma energy increased in a region of laser hybrid arc. Based on these conclusions, the formation mechanisms of the Energy Enhancement region have been discussed. Three formation mechanisms have been proposed.