The Research Of One Kind Of Tig Device To Suppress The Magnetic Field Disturbance

Electromagnetic circumstance of domestic large-scale metallurgy industry is very complex at present, for example, the electrolysis tank with great current is generally used in Electrolysis workshop which uses the bus bar current amount to above several thousand amperes. The magnetic field which produced in the space enables the welding electric arc obviously displacement, and even cannot have the electric arc. Only to cut off bus bar to stop electrolysis smelting before maintenance and care was done, which seriously influence production efficiency. In view of this question, one kind of electric welding installment is designed in this paper to suppress the magnetic field disturbance which selects design method of the magnetic head working with the welding torch, so longitudinal magnetic field is completely made into the regional arc area to control electric arc shape and suppress the outside magnetic disturbance, thus welding accuracy and stability is enhanced, and the production efficiency is greatly raised. This device is used for it's characteristics of simple additional installations and cheaper investment and fewer energy consumes and so on. There is little literature or report about restraining interfere magnetic field from affecting welding arc position and shape through outside magnetic field, so the welding quality and craftwork are improved.Firstly, FEA about factors which affects magnetic field distributing and intensity was researched based on ANSYS, and theoretic base was provided to design scientific magnetic device. A constant-current and steady-voltage power supply was designed which use half-bridge inverter and synchronized rectification. Through the experimentation of argon-arc welding, influence of arc from outside interferential magnetic field was restrained .Correctness and rationality of the device was proved.