1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 (AR) 4.3 Quality conformance inspection 4.3.1 Inspection lot formation.-Inspection lots shal
2、l com- ply with the lot formation provisions of MIL-A-48078. tion, inspection lots shall contain: manufacturer. In addi- a. Parts bearing the same lot interfix number from one b. Explosive material for lead charges from not more than two consecutive lots with the same lot interfix number from one ma
3、nufacturer. C. Explosive material for booster pellets from not more than two consecutive lots with the same lot interfix number from one manufacturer. 4.3.2 Examination,-One hundred percent examination shall be performed for all Critical defects and Major defects when so specified. Examination for M
4、ajor and Minor defects shall be performed on a defect basis in accordance with the Classifica- tion of Defects contained herein using the sampling plans of MIL-STD-105, Level II, All non-conforming material shall be rejected, see MIL-A-48078. NOTE: Critical Defect Reporting - A report of all Critica
5、l Defects found, number of parts or assemblies inspected for Critical defects, and corrective action taken, if any, shall be compiled monthly for the duration of the contract and copies forwarded to the Contracting Officer and Commander, ARRADCOM Hqts, Dover, NJ 07801, ATTN: DRDAR-LCR-E and DRDAR-QA
6、-A-F. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i+ u B 3 I m Y m ? m 9 u - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 13 777770b 03LibA71 3 o00 5 a o) Q O 4 4 m F Provided by IH
7、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 13 9997706 0346872 5 m . .* ao Q o o OQ ln O Y LH O . -, 6 - . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 23 M 7797706 03Li6873 7 M G O 4
8、 In i -9 P B O 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 13 m 7777706 034687q 7 m z 0 !. a dP O O b: CiP In O Y Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-U cr 0 o P r F - a f
9、? E -4 3 N m - to the specified requirement, the entire batch repre- sented by the saplc shall. be rejected. Reconsolidated pellet in lead cup - (see dwg. 8799767) Major aefect-.-A sample of. twenty (20) 1 oaded lead cups shall be selected from each batch for this determination which shall be perfor
10、med as specified in 4.4.2.2. samples fail to conform to the specified requirement the entire batch represented by the sample shall be rejected. If one or more samples fail 4.3.3.4.2 If one or more 4.3.3.5 Functionin .-These tests shall be performed at a Government Provxng + roz.jltGo Provided by IHS
11、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 13 m 9999
12、906 03Llb8q L m MIL-P-6 32 70 (AR ) the wire loop, without the lead cup, is submerged to the depth required to submerge the lead cup. For analytical balances that do not utilize pan, or are of special design, a comparable pro- cedure shall be established. The height of the water shall be maintained
13、throughout the test . C. Place the lead cup in the loop, open end up, and check to assure that all bubbles have been removed from the exterior surfaces when loaded and interior surfaces when empty. Balance and record this weight to the nearest 0.001 gram. To determine the specific gravity of the Com
14、p A-5 lead charge proceed as follows: 1) Weigh the loaded lead cup in air, record this weight as A. 2) Weigh the loaded lead cup under water, record this weight as B. 3) Subtract B from A and multiply by 0.9977. Record 4) the result as the volume of the loaded lead cup, V1. Remove the Comp A-5 charg
15、e from the lead cup by soaking and washing with chloroform and acetone. After all visible traces of the Comp A-5 have been removed, dry. the lead cup, weigh in air, and record this weight as C. this weight as D. , 5) Weigh the empty lead cup under wateg and record 6) Subtract D from C and multiply b
16、y 0.0077. Record the result as the volume of the empty lead cup Ve. 7) Subtract Ve from V1 and record the result as the volume of Comp A-5 (Pv). 8) Subtract C from A and record the result as the weight of Comp A-5 (Pw). 9) Divide the weight of the Comp A-5 (Pw) by the volume of the Comp A-5 (Pv) and
17、 record the result as the specific gravity of the lead cup charge. 4.4.3 Determination -. of binder-lubricant content of booster lead charge.-An accurately weighed, moisture-free portion of 5 grams of sample shall be transferred to a tared, medium porosity, sintered glass filtering crucible. The sam
18、ple shall be extracted with four 10-milliliter (ml.) portions of acetone; each portion Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-63270 13 W 777770b 0346885 3 shall remain incontact with the residue for approxirriz.Lc7.y 5 minutes before a
19、pplying suction. shall be broken up and the sides of the crucible shall be washed down with each EO ml. portion of chloroform and acetone to insure complete removal of the Comp A-5. The residue shall be aspirated until the odor of chlorofcx-!. and acetone is no longer detectable. placed in an oven m
20、aintained at 105 degrees plus or minus 5 degrees Centigrade (c) for 1/2 hour and then cooled to room temperature in a desiccator aEd their weif;Led. then be reextracted with 10-ml. portions of chlo-roLcrm and Any lumps which may persist The crucible and its contents shall be The residue shall -_ -I
21、- - weighings do not differ from eachL other by more than O. 002 grams. Calculate the to.Ci:?. percentage of binder-lubricant as follows : I To tal percent of bir.d.er- Liiiii: Icant = 100A -E- Where A - Weight of residue in crucible B = Weight of specimen on a moisture-free basis NOTE: The sample,
22、to be moisture-free, should be placed in an ambient temperature of 100 plus or minus 5 degrees Centigrade for one hour and the weight recorded as B. I 4.4.4 Non-armin4.-The fuze metal parts assembly, without mounted in a centrifuge with the longitudinal shall-be rotated at the required non-arming sp
23、eed, and then stopped and the assembly removed and inspected for evidence that the fuze assembly is secured in the unarmed position. Such evidence shall be achieved by 100 percent examination by means of a 3 to 5 power magnificatiu: to determine non-arming by the following criteria. a. Visual examin
24、at;ct in unarmed position. The assembly shall be considered unarned when the rotor pin is still retained by the leaf restraining point as indicate6 by View A and Note 7 of dwg. 9323857. by pushing with a woocIer: probe). (Attempt to release rotor b. Rotor spring properly engaged in rotor shaft slot.
25、 c. The pins in 1euws Number 2 and 3 are in the forward flat positions of leaves 1 and 2 respectively. Particular Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
26、m IHS-,-,-MIL-F-63270 23 W 9977706 03Lih7 7 W MIL-F-63270 (AR) 6.5 Centrifugal acceleration.-The centrifugal acceleration expressed in gravities (gs) is calculated as follows: a = .O000284 (N)% Where : a = acceleration expressed in gs r = istance in inches from the axis of the centri- n = revolution
27、s per minute of the centrifuge fuge to the center of the release mechanism (see Note) NOTE: The distance between the center of the rotor shaft and the center of the release mechanism is 0.218 inch. 6,6 Submission of test data and ammunition data cards.-In addition to the normal distribution of recor
28、ds, copies of all ballistic data and ammunition data cards will be forwarded to the following: Commander, ARRADCOM, Hqts, Dover, N.J. 07801, ATTN: DRDAR-QA-A-F and DRDAR-LCR-E. 6.7 Penetration.-A “complete penetration“ is defined as a hole produced by jet action extending completely through the plat
29、e. not considered cause for rejection. action is characterized by a relatively smooth tapered hole having a larger entrance than exit. occurs when a hole produced by jet action does not extend com- pletely through the plate, The term “dud“ shall be applied to rounds which merely break-up on the armo
30、r target, those which de- flagrate (function low order), or those which penetrate by Kinetic energy. disk shaped cavity on the front face of the armor which may or may not be accompanied by spalling of the rear surface. Another possible indication of a dud is a large hole approximately the diameter
31、of the projectile, which has been punched through the plate. by Kinetic energy of the-projectile with no evidence of jet action, Test reports shall distinguish between duds which merely break-up with no evidence of explosion or burning and duds which deflagrate or penetrate by Kinetic energy. The lo
32、dging of a copper slug in the completed hole is Penetration produced by jet A “partial penetration“ Rounds which deflagrate are characterized by a Cus t adi an : Army-AR Preparing Activity: Army-AR Project Number: 1390-Al81 *V.S. GOVERNMENT PRINTING OFFICE: 1978-703-122/4112 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
