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Page Title:
Dimensional control of stamped parts |
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|  MIL-C-50446A(AR)
4.4.3 Testing.
4.4.3.1 Dimensional control of stamped parts. In place of the
normal sampling associated with the Classification of Defects, and with
the approval of the Contracting Officer, a sample of at least ten (10)
parts may be dimensionally inspected to qualify the tool used in the
stamping process for use in production. In addition, a random sample
of five (5) parts shall be selected from the last portion of each
hour's production for dimensional inspection as a control of the tool
during production.
If any defective parts are found during qualification of the tool,
the tool producing the defective part shall not be used in production.
If any defective parts are found when inspection is performed for
control of the tool, the tool producing the defective part shall be
removed from production. Further, that portion of production since the
last tool control check shall be returned to the contractor for
corrective action.
All tools removed from production because of some fault, may, after
reworking, be returned to production providing they pass the
qualification test above. The contractor may request a change of
inspection frequency providing he presents objective evidence to the
Contracting Officer to substantiate the request.
4.4.3.2 Total vent hole area (alternate method). Each cartridge
case shall be inspected for total vent hole area. If any cartridge
case fails to comply with the requirements specified on the applicable
drawing, it shall be classified defective and removed from the lot.
NOTE: If, upon calibration, the equipment setting has changed so as to
permit acceptance of cartridge case having total vent hole areas that
deviate from the requirement specified on the applicable drawing, then
the cases accepted since the last calibration must be re-inspected and
the defective parts removed from the lot.
When this method of inspection applies, the requirements of
Paragraph 4.4.2.1, Critical 1 and Major 101 can be performed by a
Visual/Manual method of inspection
4.4.3.3 Process control inspection of bath temperature for anodic
coating. Continuous monitoring inspection shall be conducted for bath
temperature requirement specified on the applicable drawings. If the
bath temperature for a batch of parts does not comply with the
applicable drawing requirement, the batch shall be suitably identified,
classified defective and removed from the lot.
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