Problems with welding two thicknesses togethergreenspun.com : LUSENET : Resistance Welding : One Thread
I HAVE PROBLEM WITH MY MACHINE IT IS SPOTWELDING , IT IS NOT WELD GOOD WHEN I WELD TWO DEFFERENT METALS THIKNESS PLEASE ADVICE ME THANKS
-- samir abou hachem (email@example.com), April 05, 2003
You will have to provide more detailed information in order for people to help you. What metals? What thicknesses? What welder? What KVA? What pressure? What tips? How long? What control do you have?
-- Sam Snow (firstname.lastname@example.org), April 05, 2003.
Generally, with mild steel, we restrict ourselves to a 3 to 1 thickness ratio for a 2 layer weld. For a 3 layer ("3T") the limit is 2:1 between any thickness. This is standard in the auto industry. It is easier to accomplish if you have a larger tip on the thick side, as this reduces the heat on that side. If you were to cut, polish, and etch the weld, you could see where the nugget is in the sheet, and this would reveal whether you should move it up or down.
-- David Bacon (email@example.com), May 12, 2003.
Use the setting for the thinner sheet metal. For example if you have a 22 ga. plus a 16 ga. Use same setting as you were welding 2 x 22 ga.
-- Lennart Naslund (firstname.lastname@example.org), July 20, 2003.