Study On Characteristic And Movement Behavior Of Welding Arc Under Rotating Magnetic Field

With the application of the welding process in the industry, in order to strengthentheir competition, manufacturers scream for the less cost and higher efficiencywelding process. As a result, the high efficient and low-cost welding process has beenthe researching focus for the welding researcher. To control the welding process withadditional magnetic field has many advantages such as its affixture equip is simple,the cost is low, and it consumes little energy etc. All of these causes the weldingresearcher's extensive interest. Through the research for the characteristic of the arc and with the theory abouthow the charged particles move in the magnetic filed, the static and dynamic modelare established in this paper. Also, in this paper, we analyse the motion and itsmechanism of the magnetic control arc, and describes it in math. They lay a solidfoundation to research the characteristic of arc and its movement behavior underrotating magnetic. Based on the finite element software of ANSYS, the distribution of the magneticfield is simulated. The factors which affect the distribution of the magnetic field arediscussed, such as the shape and the location of the excitation coil, the value of theexcitation current, the size of iron core and the change of the conduct magnetic pole'sangle etc. They provide the theoretic support to choice and design the occurrenceequip scientific. Based on the theoretic analysis and simulation, the experiment system for theresearch of the characteristic and movement behavior of welding arc under rotatingmagnetic field is established, including the good performance power source, the lesscost common shielding gas and the simply, practical and portable occurrence equip ofrotating magnetic field. Based on these experiment systems, it proves that the rotatingmagnetic filed does control the TIC arc, and the variety law of the static characteristicof the rotating magnetic control welding arc and movement behavior of welding arcare also gotten through the great quantity experiments. They lay a theoretic foundationto realize the new technique of the revolving magnetic control MIG/MAG.This work is financially supported by the National Natural Science FoundationProject(No. 50205001).