How to do resistance (spot) welds by using arc/TIG welder?

[abdulbadii]

TL;DR

How do we do resistance ie. spot weld by use of arc/TIG welder

How do we correctly do resistance ie. spot weld by use of arc or TIG welder (if the difference is big explain each of this weld separately) to join piled up two bolt rings of the same thickness 2-2.5 mm and center diameters but largely different outer diameters

 

[Lnewqban]

One could take advantage of the different outer diameters and spot weld around the formed 2.5 mm step.

 

[Astronuc]

TL;DR Summary: How do we do resistance ie. spot weld by use of arc/TIG welder

resistance ie. spot weld by use of arc or TIG welder

Resistance or spot welding is different from arc or TIG welding. Spot welding usually means having electrodes in contact with the surfaces of the work piece(s), while arc or TIG means an arc passes through a gas in a gap between the work piece(s) and welding electrode. In TIG, an inert gas is applied around the electrode.

What kind of joint is one planning? In other words, how does one plan to join the two rings. If one is joining the two rings along the seam, then one could use TIG welding to do a seam weld on the inner circumference and a fillet weld at the inner corner of the step.