Hi,

I am all new to the seam welding business, but it might be what I need. The product I needed welded are air ducts. Basically these are long box shaped objects with both ends open. My question is: Is it possible to access the whole seem or would there be problems with this? Also, does anyone know a good source for information on seam welding and where to get seam welders?

Regards,

Gert

-- G. Mensing (mensing@hotmail.com), December 07, 2001

Answers

Whether a standard seam welder would work for you would depend on several factors, once of which being the length of the duct you wish to weld, and the diameter. A normal seam welder would have to stick one arm inside the duct, and then a second arm on the outside would come down to meet the first and clamp the metal between.

Resistance welding takes current (heat) plus pressure to forge the metal as the weld happens.

Some examples of seam welders are at: http://www.tjsnow.com/used/usedseam.htm and at http://www.tjsnow.com/standard.htm

I suggest contacting a company directly with all the details of your part, and they will be able to tell you if it is possible with a standard type of machine, or if it would take a custom machine. I can see how a custom machine could be built to get around the arm length problem of a standard machine, and allow you to weld as long a duct as you had material for.

Good luck! Sam

-- Sam Snow (2snows@mailandnews.com), December 08, 2001.

If your seam can be made from a pair of flanges, welded together like those of an automotive gas tank, you would have unlimited duct length, since both wheels would be outside. You would use a LOT less power, which can be a real issue with a seam welder.

-- David Bacon (dbacon@updatetechnology.com), April 19, 2002.