Is there a way to do non-destructive testing while the weld is
being made?
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After a spot weld is made, there is no way other than by destructive
testing to ensure 100% quality welds. Understanding the basic principles
of resistance welding and keeping track of the major variables will
enhance confidence of the resistance welding process. If you want
to produce spot welds and want to know immediately if the weld is
good, a technique such as "Thermal Force Feedback" (TFF™) may
provide this confidence.
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The TFF™ feature is protected under the following US
patents:
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5,789,719
5,504,297
5,254,828
5,111,020
4,419,558
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