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Dimensional control of stamped parts. |
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|  MIL-M-70780 (AR)
4.4.3 Testing. Testing is described in the First Article
Quality Conformance Inspection Tables.
4.4.4 Inspection equipment. The inspection equipment
required to perform the examinations and tests prescribed herein
is described in the Paragraph Reference/Inspection Method column
in the tables starting with Paragraph 4.4.2.1, The contractor
shall submit for approval inspection equipment designs in
accordance with the terms of the contract. See MIL-A-48078.
4.5 Methods of inspection.
4.5.1 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 shall 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.
4.5.2 Salt spray test of protective finish. Five parts of
each part number shall be selected from each lot in accordance
with the lot formation provisions of specification QQ-P-416. The
test shall be tested as-specified in ASTM B 117-73. The parts
shall be tested for the duration specified on the applicable
drawing. At the end of the required time, the parts shall be
examined for evidence of white corrosion products (See Section 3
of QQ-P-416).
If any part shows any evidence of corrosion the lot
represented by the sample shall be rejected.
Parts so tested shall not be
This is a destructive test.
returned to the lot.
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