By Rick McLean
Resistance spot welding, which the auto- motive industry adopted in the 1930s, is
still the industry standard for many joining
requirements. It is a process by which metal
surfaces are joined by the heat obtained from
resistance to electric current.
However, clinching, which is a mechanical
process of joining metal together, has become
a viable alternative for certain applications.
Each method has pros and cons; it’s up to you to
decide which is right for your production.
Spot Welding Pros and Cons
The most significant benefit of spot welding
is the initial purchase price of a spot welding
machine; it is about half the cost of an entry-
level, floor-model clinching machine.
The strength of a spot weld is excellent when
the process is done right, with clean “dressed”
tips and optimal squeeze, heat, and weld time
settings. If a flush surface is required on the
finished piece, spot welding is your best option
Each method has pros and
cons, so consider which one
suits your project best