Miller and Lincoln MIG and TIG Welders
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Read welding articles from Miller and Lincoln MIG and TIG Welders
In a metal arc system the tip of the electrode melts and drops are transferred to the work through the arc column. When a carbon or tungsten (TIG) electrode (as in Miller TIG welders or Lincoln TIG welders) is used the electrode does not melt but a filler material is used from a wire or a rod. In metal arc systems more heat is transferred to the molten metal pool leading to higher efficiency and a smaller zone of the metal that is affected by the heat. MIG welding refers to the use of a consumable wire feed to produce a filler material. Both Miller MIG welders and Lincoln MIG welders use this method. Arc Welding - the Basics
Tungsten Inert Gas welders or TIG welders use an inert tungsten electrode and heat is generated between this electrode and the work metal. Miller TIG welders and Lincoln TIG welders both operate using this method. It was first used in the aerospace industry in the 1940’s It can be used in two ways either without a filler material or using a wire filler metal which is melted at the tip of the electrode and dropped onto the joint being welded. For shielding the weld inert gas, usually argon, is used. Metal will react with oxygen in the air at these temperature and the resulting oxidation of the metal reduces the strength of the weld. TIG Welder Operation
Welding aluminum can be a challenge, even for welders experienced in other metals as aluminum has quite different properties than other metals used in welding. It has a lower melting point higher thermal conductivity than steel and this can lead to burn though if the correct techniques are not used. Aluminum wire is also softer than other metals so is harder to feed when arc welding and easily becomes tangled. The following directions should help to overcome these problems. Welding Procedure for Aluminum
Metal Inert Gas or MIG welders use a consumable wire feed electrode that provides molten metal for the joint. Lincoln MIG welders and Miller MIG welders use this method.Heat is generated in the process between the electrode and the work metal. A spatter of hot particles is produced in this process which make it difficult for the operator to see the weld and also causes damage nearby parts of the work. Some gasless MIG welders use flux which also produces smoke and may contaminate the weld. MIG Welder Operation