Page 13 - MetalForming September 2012

put of MFDC technology has proven ideal for spot welding aluminum at LJ, and the vertical press-type machine pro- duces very attractive welds, say the
Johnsons. And, only two months after installing the new welding machine, the brothers received a call from a cus- tomer in the food-service industry that needed to farm out a huge amount of fab- ricating—75 part numbers requiring stainless-steel spot welding.
“Production welding had never been our world,” recalls Greg, “but this cus- tomer wanted us to produce 1350 parts/week. Having the MFDC spot welder gave us the confidence to proceed with the order.”
Soon after that large food-service order landed in the shop, LJ Fabricators purchased a standard T. J. Snow AC press-type spot and projection welder, with a larger diameter air cylinder capable of producing the proper forging force for spot welding of stainless. Using the proper set- tings makes it much easier to get strong and attractive spot welds on stainless steel.
“Having the two good spot welders in
our shop has allowed us to go after projects we might not have been com- petitive on in the past,” says Greg, “and now we purposefully look for spot-weld- ing jobs.”
T.J. Snow Company: 423/894-6234; www.tjsnow.com
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Tech Update