Oxy-Fuel Cutting and Welding edit, oxy Fuel cutting and welding is a skill all in itself.
However, spools of wire can be expensive, and the use of a 'shielding gas' is needed to keep the weld free of contaminants (oxidization, particles, bubbles, etc.).
This is done by heating the base metal into a molten puddle at the base of the joint, and then 'dipping' or adding the filler rod directly to the puddle.TIG welding is achieved by operating the torch in a similar manner to oxy-fuel welding, but the operator controls the heat by means of electricity.The main difference can be seen in the selection of the electrode wire for this process.S standing for solid wire.TIG stands for 'tungsten inert gas' and gtaw for 'Gas Tungsten Arc Welding both meaning the same thing.Generally, the principal for oxy-fuel welding or cutting is the same.There are 'remotes' that the welder can use for this task, or it does boat insurance cover a cracked engine block can be set directly on some machines, so it will not fluctuate.
There are however, other methods that will be discussed in a later chapter.
For other, more advanced welding techniques, see.
A slightly carbonizing flame is desirable when welding with brass rod, or 'brazing thus, the 'feather' should be present, but only slightly above the 'cone about a half of an inch.
75/25 is the most common shielding gas for gmaw as it is relatively inexpensive, and has excellent welding characteristics.Tungsten is used as an 'electrode which is semi-permanent in the torch.This allows complete fusion of the base metal and filler rod, without burning out the tungsten electrode.In a cutting torch, however, there is the one 'orifice' in the center, and a circle of orifices around.The electrode or 'stick' is placed into an electrode holder (gun or clamp style) which is then scraped or tapped onto the grounded weld piece to produce an 'electric arc which produces enough heat to melt the 'rod' and form it into the weld piece.In a regular torch head, there is only one 'orifice or hole, for which the gas and oxygen can pass through.The flame is wider, more forceful and louder (although not much).The torch is lit regularly, and adjusted to a hot neutral flame.