Got problems verifying that a hole exists...
....does it have the correct area... or has a pulled slug?
This application will show you how you can use analog proximity sensors
combined with the signatureACE®'s high resolution and speed to verify hole
quality.
The
Signature Technologies
SA-2000 “SAM” module, and Signature
Technologies “SamView™” Software package can be used to non-contact
evaluation of specific features on manufactured parts.
The
illustrated method can perform the same type of test every stroke
of the machine so the work pieces can be verified to have specific features
present.
The
system works by applying the work piece precisely positioned relative to the
analog proximity displacement sensor each stroke of the machine.
Since the displacement is always the same, the proximity then looks for
AMOUNT of material in its sensing field, and if MORE material is present, then
the indication is that a hole is missing, or its slug hasn’t cleared.
Magnetic sensors have also a
reaction to material variations, and magnetic history, so this method will not
produce a precision measurement of the hole(s), but will easily indicate
presence, absence, or gross deformity issues.
The
measurement cannot be calibrated,
and must be used as a comparative measurement.
Check other application bulletins for calibrated measurements.
Multiple
sensors can be used in cases where there are several different features to
measure, or where multiple measurements are required to insure proper formation
of a single feature. The SAM™
module can handle inputs in groups of 8 up to 56 total points.
Signature Technologies can supply a wide variety of solutions to various manufacturing process
problems dealing with measurement, verification of properties, tool condition,
and machine health. We can also “close
the loop” by performing process adjustments in response to specific variations
in force, location, or shape of the work piece, as well as more simple controls
which can track and reject specific parts which don’t meet specific quality
criteria.
For a .pdf file copy of this bulletin please click here.
