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Dimensional control of main charges and boosters |
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|  MIL-M-63457A(AR)
4.4.3 Testing
4.4.3.1 Dimensional control of main charges and boosters (See
Dwg. 9278018 and 9277827). The dimensions/parameters specified in
paragraphs 4.4.2.1 and 4.4.2.2 for the main charges and boosters
shall be checked by randomly selecting three (3) samples from the
quantity produced by each press during a period not to exceed four
(4) hours. The samples shall be allowed to cool and become
dimensionally stable prior to inspecting. The quantity represented
by the samples shall be identified and not used in production until
the dimensional inspections are completed. If any one (1) sample
fails to comply with the dimensional requirements, the quantity of
parts represented by the sample shall be subjected to 100%
inspection. The contractor and technical agency shall determine the
amount of time required for cooling and supply this information to
the resident Government inspector. The above inspection shall also
be performed each time a new lot of explosive material is used.
4.4.3.2 Density of the main charge and booster (See Dwg.
9278018 and 9277827). The density of the main charges and boosters
produced from each press shall be checked by randomly selecting one
(1) sample from the quantity produced by each press during a period
not to exceed four (4) hours. The boosters and main charges shall
be allowed to cool, become dimensionally stable and meet dimensional
requirements prior to performing the density determination. The
quantity represented by the sample shall be identified and not used
in production until the density determination is made and the part
accepted. If the sample fails to comply with the density
requirements of the applicable drawing, the quantity of parts
represented by the sample shall be subjected to 100% inspection.
The contractor and technical agency shall determine the amount of
time required for cooling and supply this information to the
resident Government inspector. The above test shall also be
performed each time a new lot of explosive material is used. The
test shall be performed as specified in 4.5.2.
4.4.3.3 Explosive output performance. A sample of each lot of
explosive used to manufacture main charges and boosters shall be
tested prior to use in production. Ten (10) main charges shall be
pressed and inspected for the defects listed in 4.4.2.1. The
density of the samples shall be determined (See 4.5.2) and the
samples with the highest and lowest density (within acceptance
limits) set aside for explosive performance tests. The main charges
shall be tested in accordance with 4.5.3 using boosters from a
previously accepted booster lot. Ten (10) boosters shall be
likewise pressed from each new batch of explosive. The boosters
shall be inspected for the defects listed in 4.4.2.2. The boosters
with the highest and lowest density shall be set aside for explosive
performance test. The test shall be in accordance with 4.5.3 using
main charges from an accepted main charge lot. Failure
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