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Resistance welding is an electromechanical process that is used
to assemble metallic parts. A basic understanding of the electrical
and mechanical components of the process will provide the foundation
for developing control algorithms that benefit the users of this
assembly method. It is a good practice to design welding tools beginning
at the requirements of the weld nugget and progressing outwards
to the controls. Mistakes can be made if one decides first on controls
before considering the weld results that are needed. The progression
shown on the left starting with the welding process (i.e. spot or
projection) then continuing on to mechanical tools, then power transformers,
then finally welding controls is the order to follow.
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