The Right Miller Welding As Per the Requirement Now

The miller welding is the most complex. The miller welding is a welding method arc made under the protection of inert gas (usually argon) using a non-consumable electrode. We start with the ignition of the arc assisted by a generator causing an HF voltage between the tungsten electrode and the part to be welded. The arc will be established after the spark has ionized the gas. The electrode melts at around 3370 ° C and must not melt in this case.

The temperature miller then rises entre 3400 and 4000 ° C. The polarity of the electrode is always negative at the current source, because the heat generation is lower when miller welding with direct current. It is by activating the trigger of the torch that the gas can escape and the electrical circuit is cut. The use of the best miller welder is important.

The filler metal then comes in addition, manually or automatically, to mix with the material and create the weld bead.

MIG welding: Principle

The MIG welding under inert gas protection is a welding process very used nowadays. For this process, an electric arc is created between the part to be welded and the filler wire (from Ø 0.6 to Ø 2.4 mm). When the arc is obtained, this filler wire is unwound at constant and continuous speed in the molten pool generated by the powerful energy of this arc. A weld bead is obtained by mixing the filler metal and the base metal, molten during the arc. It is carried out under gas protection (active for the MAG welding process and inert for the MIG welding process).The parameters influencing the realization of the bead are:

  • wire speed (intensity)
  • gas flow
  • the diameter of the electrode wire
  • welding position
  • the preparation
  • dimension and materials to be welded

The miller welding is certainly the sharpest and most precise welding processes existing. It allows welding to be carried out on corrosion resistant alloys or metals such as aluminum or magnesium.

miller = Tungsten Inert Gas

miller welding: the principle

The arc: The arc is started using a spark gap which will generate a high frequency voltage between the electrode and the part to be welded.

The arc is established after the spark has ionized the gas.

The inert gas: the miller welding is carried out with an inert gas like argon to protect the weld pool and the electrode.

The electrode should not then melt. It simply acts as a support for the arch. Its melting point of rises to 3370° C. The miller arc will then be 3400 to 4000° C.

The electrode: In miller welding, it is connected to the negative pole, where the heat is less strong for direct current welding. It is the argon that will protect the electrode and the bath during welding. Always use a non-fusible and refractory electrode.

The trigger: by activating the trigger, the welder allows both to let out the gas, and to close the electrical circuit where the current passes.

If the wire is close enough to a part in contact with ground, an electric arc will form. And thus melt matter.

The weld bead: by providing the appropriate metal to the material, a weld bead is produced. It is in fact here to make the molten material fat always under protection of inert gas. However, it is possible to weld without filler metal for thin thicknesses.