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Corrections
for poorly Bent Tubes
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After the initial tooling
set-up has been made, study the bent part to determine what tools
to adjust to make a better bend. Keep in mind the basic bending principle
of stretching the material on the outside radius of bend and compressing
the material on the inside of the bend. Make only one adjustment for
each trial bend unless the second adjustment is very obviously needed.
Avoid the tendency to first increase the pressure die force rather
than adjust the wiper die or mandrel location. Start with a clean,
deburred and lubed tube with the elongation properties sufficient
to produce the bend.
Note: There are certainly
other corrections that could be made for the following problems. These
illustrations are a few examples of how to "read" a bend
and improve the tooling set-up.
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