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Page Title:
Initial qualification of die-press set-ups |
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|  MIL-C-48868E (AR)
4.3.4 Initial qualification of die-press set-ups. Initial
die-press set-up qualification shall be accomplished by conven-
tional die maker techniques to check the concentricity of
male-female dies. The following procedure shall be employed:
a. Strips of eutectic solder 0.032 inches in thickness are
to be placed in the cavity of each die in three places. The
dies are then to be closed on the strips. Subsequently the
strips are to be removed from the dies and measured with a ball
anvil and ball spindle micrometer. Inner diameter, outer
diameter, and base thickness measurements are to be obtained
and shall be in accordance with the applicable drawing.
b. After the die-press
set-ups have been qualified with
solder, fifteen each parts
shall be processed through each die
and measured for inner and
outer diameters, and base thickness.
All dimensions shall be in
accordance with the applicable
drawing.
c. All measurements obtained during die-press qualifica-
tion shall be maintained on file and shall be available for
government review. The die-press set-ups shall not be approved
for use in production if any part, assembly or solder set-up
fails to comply with above requirements.
d. All die-press set-ups shall operate against the
established stop and meet an established dwell time.
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