I would like to know, if one is using a spot welder that can only transmit even current. In the case of spot welding a 1.6mm ally plate to a 4mm ally plate, is it necessary to remove the oxidised layer to obtain fusion? When we attempt to remove the oxidised layer, the plates will not bond, however when the oxidised layer is not removed the plates will bond. Settings are 8.2 current and 2.2sec delay?

Would you have any answers?

Thanks

-- Anthony Hnuter (Anthony.Hunter@bigpong.com), March 03, 2001

Answers

i am assuming you are resistance spot welding. it sound like you welder is too small, not enough current and the heat ballance is wrong. if you should require further information please e-mail me.

-- Stuart Barberich (resistoweld@worldnet.att.net), March 13, 2001.

To properly handle your inquiry regarding spot welding aluminum, we really need to know the following:

„h Are you working towards commercial quality, automoyive quality, or military quality? „h Specifications, samples and/or drawings of the part(s) you wish to weld. „h Whether you have any special machine specifications or requirements. „h What are your part clearance requirements. „h Your plant's incoming line voltage (220, 440, 550), (50, 60 Hz.), Single or Three Phase. „h Whether you need us to quote any special fixturing or tooling to use with these welders. „h How soon you need one or more of these welders in house.

Please excuse us for asking all these questions. This is what we normally ask customers over the phone when they call for a quote.

Questions concerning welders over the Internet has removed a level of personal involvement and service that we at T. J. Snow Company seek to offer our customers. In other words, we want to be very closely involved with your company in this welder selection process. Please take advantage of our 37 plus years of experience. We hope to have the pleasure of hearing from you again soon!

Bob Balla Applications Engineer Dept. T. J. Snow Company, Inc. 6207 Provence Street Chattanooga, TN 37421

Phone: 423-894-6234 423-308-3161 (direct line) Fax: 423-892-3889 e-mail: bobballa@tjsnow.com

-- Bob Balla (bobballa@tjsnow.com), April 13, 2001.

we are the ones that worked with GM on their alum. welding. If you clean the alum. too well, you remove the resistance between the sheets and do not generate any heat. If you give me a fax number, I will send you a weld chart for commercial grade welding of alum.

-- tom mitchell (atekweld@aol.com), April 24, 2001.