How is filler metal introduced in Tungsten Arc Gas Shielded Welding, if required?

In Tungsten Arc Gas Shielded Welding, which is commonly known as TIG (Tungsten Inert Gas) welding, filler metal is manually fed into the weld area when needed. This process involves the welder positioning the filler rod between the tungsten electrode and the workpieces being joined. The welder has the ability to control the amount of filler added to the joint, allowing for greater precision and adaptability depending on the specifics of the weld and the materials being used.

This manual introduction of filler metal enables skilled welders to enhance the quality of the weld and to strategically add material only when necessary, minimizing waste and ensuring better fusion between the base metals. Such control is one of the reasons why TIG welding is favored for applications requiring high standards, such as in aerospace, automotive, and other precision engineering tasks. The option of automatic feeding (as suggested in another choice) is not applicable in traditional TIG welding practices, as that usually pertains to different welding processes like MIG (Metal Inert Gas) welding.