 |
|||
|
Page Title:
Application of defect standards |
|
||
| ||||||||||
|
|  MIL-P-85766(AS)
4 . 5 . 3 Band tightness. The band tightness test shall be in accordance
with Drawing B7259545. The inspection sample shall be cycled through the
tester to determine compliance with the rotating band tightness require-
ment. The total measurement of radial void, registered on the tester indi-
cator at final ram pressure, shall be divided by four (number of indenters)
to determine the average radial void.
4.5.4 B o d y soundness. Inspection shall be in accordance with all
requirements of Drawing DI10752O3 for detecting metal discontinuity in pro-
q
jectile bodies for 20mm ammunition, except for those inspection require-
ments which are reserved for Government application, as specified herein.
4.5.4.1 Application of defect standards. Master defect standards,
referenced in Drawing B7259545, shall apply to resolve inspection discre-
pancies occurring between the results of defect standards supplied for
contractor soundness inspection and those supplied for Government soundness
verification.
4.5.4.2 Automatic eddy current inspection effectiveness. Equipment
checkout shall be performed in accordance with Drawing DI10752O3 at the
start of each shift and after any adjustment or shutdown. Upon completion
of checkout, cycle the PCS No. 1, front slot and rear slot standards
through the inspection system during automatic operation. All three stan-
dards must be rejected to assure correct adjustment for reject level and
scan limits. During remainder of shift, the PCS No. 1 shall be cycled
through the equipment at intervals of 20
minutes during automatic
operation.
4.5.4.3 Equipment
verification. The Government inspector shall maintain
a set of standards independent of the contractor, and shall cycle these
standards through the equipment at any time. Failure of equipment to reject
standards shall be evidence that the equipment is not properly adjusted and
the contractor shall be notified.
4.5.4.4 Soundness
verification. After equipment checkout and verifica-
tion as specified herein, the entire lot sample shall be inspected with the
equipment operating automatically. Any rejected unit of the sample shall
be automatically cycled through the equipment with the calibration button
pressed, which lowers the sensitivity one step below that used for produc-
tion inspection. Any unit which is rejected at the lower sensitivity shall
be classified as a defect.
4.5.5 Protective
coating.
4.5.5.1 Phosphate coating. The phosphate coating shall comply with
TT-C-490 and Drawing 1575AS402. The prescribed panels shall be processed
with the projectiles to be represented at the start of daily production and
at 4-hour intervals thereafter. Appearance and weight of the coating shall
be recorded.
17
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals