Capacitive Discharge Gap Stud Welding
In this CD Welding process. The fastener (while it may start in contact with the work) is lifted above the grounded substrate. When the weld sequence is initiated the fastener becomes electrically hot and begins accellerating toward the work piece. Because the fastener already has momentum, the weld times are even shorter than for contact CD Welding process. Times of 4-6 milliseconds are common for this process.
Because of the extremely short weld times, gap CD welding is well suited for thin substrates (<.03 inch) and for very thermally conductive substrates
Very well suited for thin work pieces (<.03 inch) with little or no reverse side marking. Frequently used on very thermally conductive substrates like aluminum.
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