Are flat parts critical to your
...are you have problems delivering?
SA-2000 “SAM” module, and Signature
Technologies “SamView™” software package can be used to monitor the
flatness manufactured parts using the techniques below.
of sampling selected parts using an off-line gauging fixture, the illustrated method can perform the same type of test
every stroke of the machine so that each part can be individually
verified as having been formed acceptably to tolerance.
The system works by measuring the
displacement of the flattened portion of the work piece relative to the
dimensional sensor implanted into the forming die.
Timing of the measurement is critical since the part must not be measured
when it is being held in an abnormal position by the forming die.
part must be held in reference position both horizontally and vertically
as shown, for example, by a pilot, and clamped vertically by a pressure pad.
The area to be measured must be totally free and unrestrained by trim, or
forming tooling when the measurement is made. The measurement can either be
calibrated, or comparative depending on the application.
Calibrated measurements will give the dimensional variation at the
Difference between the measurements obtained from (in this case) the Left and
Right sensors will indicate flatness:
|The signature to the right shows a
reasonably flat component since both of the sensors indicate similar
|The signature to the right shows a seriously "Out of Flat" situation. Note the
large difference from Left to Right.
sensors can be used on wider work pieces to insure parallelism, or area flatness
of the formed portion. The SAM™
module can handle inputs in groups of 8 up to 56 total points.
If desired, Signature
Technologies can provide controls to adjust the forming station(s)
dynamically based on the dimensional measurements.
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.