What is the cause of partial magnetic blow?
The magnetic lines of force around the arc may be evenly distributed;2) adjust the dip angle of the welding rod properly and tilt the electrode towards the blowing direction;3) the method of subsection retreat welding and short arc welding can effectively overcome the magnetic deviation blow;4) AC welding instead of direct current welding. When alternating current welding is used, the induced current is induced by the changing magnetic field in the conductor, and the magnetic field produced by the induced current weakens the magnetic field caused by welding current, thus controlling the magnetic bias blow;5) place a ferromagnetic material that produces a symmetrical magnetic field, so that the ferromagnetic material around the arc is uniformly distributed;6) reduce the residual magnetism on the weldment. The residual magnetism on the weldment is mainly caused by the orderly arrangement of atoms and domains. In order to reduce or prevent the magnetic deviation of the magnetic domain arrangement of the weldment, the part of the residual magnetism on the weldment can be locally heated, and the heating temperature is 250~300 degrees centigrade. After production, the demagnetizing effect is good. Moreover, in the residual magnetic field of the weldment, the applied magnet balances the magnetic field.7) reverse demagnetization. That is, a magnetic field is produced by the welding piece to counteract the residual magnetism on the weldment so as to overcome and eliminate the influence of the magnetic deviation blow on the welding arc.
Equal distances are provided with double ground wires or multiple ground wires.
