1、n -. , - -* . MIL-C-50471 13 993990b 0327575 3 Si#:- .- . _- MIL-C-OI71 (r*!lJ) 14 Jacuary 11370 Sune r s e ding (See para. 6.3.6) MILITARY SPECIFICATIOP! CHARGE, SUPPLZMENTARY ASSEMBLY WITH SPACER FOP DEEP CAVITY LOADED PZOJECTILE , LOADING ASSEVBLING AND PACKING 1. SCOPE 1.1 This specification cov
2、ers the loading, assembling and packing for supplementary charge assembly for deen cavity loaded projectiles. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the Issue in effect on aate of invitation for bids or request for proposals form a part of this specification herein. SPEC IF I CAT I O
3、N S MILITARY MIL-A-2550 MIL-1-45607 - Inspection Equinmeri:, SUDPly and - Amunition and Special YJeapons , General Specification for Maintenance of STANDARDS MILITARY IS DOCUMENT CONTAINS .bsequent quantities presented for inspection. Homogeneity shall be considered to exist provided the lot has bee
4、n produced by one manufacturer in one unchanged process, in accordance with the same drawings, same drawing revisions, same specifications and same specification revisions. 3 i o Licensed by Information Handling ServicesMIL-C-50471 13 I 777970b 0327578 7 !CIL-C-50471 (MU) Changes to the process, spe
5、cification, or drawing not affecting safety, performance, interchangeability or storage as determined by the Government, shall not be deemed to alter the homogeneity of the lot. Inspection lots shall comply with MIL-STD-105. Unless otherwise approved by the contracting o?ficer, the inspection lot si
6、ze of end items deliverable under the contract shall be not less than the smallest weekly estimate of quantities contractually scheduled for production during the contract period nor more than the largest monthly quantity contractually scheduled for delivery during the contract period. Inspection lo
7、ts of components or subassemblies, other than the items of delivery, snall be homogeneous and of a size mutually convenient to both the contractor and the Government inspector. Lot numbering, as required, shall be in accordance with MIL-STD-1168. Each lot shall contain: a. TNT of one type from one l
8、ot interfix number from one manufacturer. b. Bodies of one lot interfix number from one manufacturer. 4.2.2 Examination.-Inspection for Critical defects (and Major defects, when so specified), shall be 100 percent. Sampling plans and procedures for Major and Minor defects shall be in accordance with
9、 MIL-STD-105 except that continuous sampling plans in accordance with MIL-STD-1235 may be used if approved by the procuring activity. Also, at the option of the procuring activity, AQLs and sampling plans may be applied to individual characteristics listed using an AQL of 0.65 percent for each Minor
10、 defect and an AQL of 0.40 percent for each Major defect, except where 100 percent inspection is specified. Equipment necessary for the performance of the inspection listed shall be in accordance with 4.2.4. 4.2.2.1 Body, prior to loading (see dwg. 8838201 a detail of dwg. 8797090). Categories Defec
11、ts Method of Code No. Inspec tion (see 6.2) Critical: None defined. Major: AQi 0.40 percent 101. Crack, split, puncture OP similar damage extending through material.Visual O1001 Minor : AQL 2.5 percent 201. Damage (not extending through 202. Marking missing, misleading or material) or distortion .Vi
12、sual O1006 unidentifiable. Visual 01007 . 4 o Licensed by Information Handling Services203. Lvicence of poor wori:mr:shln 4.2.3.2 Disc closing, prior to loaing (see UW. S83Fi?O? a (see 3.3) . vi-,*- puG1 01;3ni! detail of ciwg. 8797090) Categories Defects Ye thoci OC Code Xo. Inspc! c t ion Critical
13、: None defined Ka j or : AQT, 0.40 percent 101. Crack, split, puncture or similar damage extending . through niaterial .Visual 02997 Minor : AQL 1.0 percent 201. Damage (not extending through 202. Evidence of poor workmanship material) or distortion . Visual 02004 (see 3.3) .visual 02005 4.2.3.3 Spa
14、cer (see dwg. 8797088) Categories Defects Yetho6 of Coae !o. Insnection Critical: None eiineci Xajor: luone defined Yinor : AC.;a.; or : AGL O. 40 percent lal. Total lerct h 2Grp 05001 5 i. Licensed by Information Handling Services_- MIL-C-50471 13 = 7777906 0327580 7 MIL-C-50471 (XU) Kinor: None de
15、fined 4.2.2.5 Supplementary charge assembly (see dwg. 8797090) Categories Defects Method of Code No. Inspection Critical : 1. Pad missing . Visual- 06001 Haj or : 100 percent inspection 102. Pellets loose.Manual 06002 Major: AQL 0.40 percent 101. Outside diameter, max, Gage o6003 Minor : AQL 2.5 per
16、cent 201. Tab missing, incorrect or inadequate Visual 06004 202. Crimp not full 360 degrees. . Visual 06005 203. Wrinkled body . Visual 06006 (see 3.3) . Visual 06007 204. Evidence of poor workmanship 205. Marking missing, misleading or 206. Pad improperly assembled or 207. Explosive on outside surf
17、aceVisual O6010 4.2.2.6 Carton, prior to closing (see dwg. 8861645) unidentifiableVisual 06008 aligned Visual 06009 . Categories Defects Method of Code No. Inspection Critical: None defined MaJor: None defined Minor : AQL 1.0 percent 201. Separator damaged to the extent that the supplementary charge
18、s touch each otherVisual 07001 202. Supplenentary cnarge missing Visual O7 O02 4.2.2.7 Carton, seaed (dwg. 8861645) Categories Defects Method of Code No. Inspection Critical : None def :led. 6 Licensed by Information Handling ServicesMI L-C-50 4 7 1 (MU ) Major: AQL 0.40 percent 101. Carton damaged
19、to the extent that the contents are exposed or likely to become exposed in subsequent or not securely sealed to the handling .Visual 08001 carton .Visual o8002 102. Sealing strip torn, incomplete Minor: None defined 4.2.2.8 Wood packing box (prior to closing) (see dwg. 8861646). Categories Defects M
20、ethod of Code KO. Inspect ion Critical: None defined Major: AQL 0.40 percent 101. Case liner incorrect, incomplete or insecurely sealed.Visual ogooi Minor: None defined 4.2.2.9 Wood packing box sealed (see dwg. 8861646). Cat egories Defects Method of Code No. Inspect ion Critical : None defined Majo
21、r: AQL 0.40 percent 101. Box damaged to the extent that the contents are exposed or likely to become exposed in subsequent handling V isual 10001 or loose .Visual 10002 102. Hardware or strapping broken Minor: AQL 1.5 percent 201. Hardware or strapping 202. Car seal unsealed or 10003 10004 10005 inc
22、orrectly assemble Visual improperly positioned Visual 203. Contents loose. Visual 204. Marking missing, misleading or i0006 unidentifiable, ,.V isual 4.2.3 Testing 7 Licensed by Information Handling ServicesNIL-C-50471 13 7977706 O327582 O MXL-C-50471 (MU) 4.2.3.1 Specific gravity of charge (see dwg
23、. 8797OgO), Kajor defect 4.2.3.1.1 Pellets.-Ten randomly selected TNT pellets shall be tested from each eight hours of production. Failure to comply with the applicable requirements shall be caiise for rejection of the eight hours production represented by the sample. Testing shall be performed as s
24、pecified in 4.3.1.1, Code No. 11001. 4.2.3.1.2 Cast.-One body from each one hundred to be loaded shall be selected and marked sample. Failure to comply with the applicable requirements shall be cause for rejection of the lot. Testing shall be performed as specified in 4.3.1.2, Code No. 11002. 4.2.3.
25、2 Barium stearate content of charge (see dwg. 8797090)- Major defect (applicable to pellets) .-Five grams of material shall be randomly selected just prior to pelleting, from each eight hours of production or portion thereof, Failure to comply with the applicable requirement shall be cause for rejec
26、tion. Testing shall be performed as specified in 4.3.2, Code No. 12001. 4.2.4 Inspection Equipment .-Equipment Tabulation Number ET-8797090 identifies the inspection equipment required to perform the examinations and tests prescribed In this section. The con- tractor shall design inspection equipmen
27、t in accordance with the instructions in paragraph. 6.3. 4.2 . 4.1 Government Fight to documentation. -Inspection equipment drawings and lists provided and revised in accordance with the require- ments of the ET may be used by DOD activities for design, procure- ment, manufacture, testing, evaluatio
28、n, production and receiving inspection, overhaul, shipping, storage, identification of stock, ordering and storage OF replacement parts, inspection of items at overhaul, general maintenance of equipment, construction, survey and whenever inspection equipment drawings are needed. 4.2.4.2 Supply and m
29、aintenance.-Supply and maintenance of the equipment listed on the ET shall be in accordance with Specification MIL-1-45607. 4.2.4.3 Government use of contractors inspection and test equipment.-The contractor shall make available to the Government . all inspection and test equipment necessary for det
30、ermining confor- mance with contract requirements, Personnel for operating the equipment, and verificacion of its accuracy, shall be supplied by the contractor for the performance of examination or test by the Government . 4.3 Test methods an6 proceaures. 8 o Licensed by Information Handling Service
31、sMIL-C-50471 13 E 7777906 0327583 2 MIL-C-50471 (MU) 4.3.1 Specific gravity. 4.3.1.1 Pellets.-A beaker shall be filled with clean mercury. A semi-hard rubber perforated plate, pierced at each corner with sharp pins so that one half inch of the pin protrudes from each side, shall be placed in the mer
32、cury and the mercury shall be leveled off by pressing a glass plate until it is even with the top of the beaker. beneath the prongs of the rubber plate and the mercury shall be leveled as before. clean evaporating dish, and the mercury in the dish weighed. The specific gravity shall be calculated as
33、 follows: The pellet shall be placed The excess mercury shall be caugh; in a Specific gravity = 13.54 w/wl where : w = weight of sample w = weight of displaced mercury 4.3.1.2 Cast.-The sample body shall be weighed and then filled with water and weighed. and then placed in the loading line and loade
34、d under conditions identical in all respects with those employed in loading the lot. After loading, each sample body shall be weighed, then filled with water and reweighed. The specific gravity shall be calculated as follows: The sample body shall be dried Specific gravity = (C - A) / (B - A) - (D -
35、 Cl) where : A = weight of empty body B = weight of body filled with water C = weight of body and TNT D - weight of body and TNT and water 4.3.2 Barium stearate.-An accurately weighed portion of 5 grams shall be transferred to a tared, medium porosity, sintered glass filtering crucible. The sample s
36、hall be extracted with four 10-milliliter portions of acetone. Each portion shall remain in contact with the residue for approximately five minutes before applying suction. shall be broken up and the aies of the crucible shall be washed down with each 10 mililicer portion of acetone to insure comple
37、te removal of the TNT. odor of acetone is no longer detectable. Collect the fourth extract in a clean container, and add a few drops of approximately N/10 sodium hydroxide solutLon. The absence of a red color indicates complete extractior. If a red color is produced, extract with additional 10 ml po
38、rtions of acetone until complete extraction is indicated. Any lumps which may persist The residue shall be aspirated until the The crucible and its contents shall be placed in an 9 Licensed by Information Handling ServicesMIL-C-50471 13 7777706 03275Li 4 oven maintained at io5 degrees Centigrade (OC
39、) plus or minus 5OC for one-half hour, cooled to room temperature in a desiccator and then weighed. The percent barium stearate shall be calculated as follows : Percent barium stearate = 100 A/B where : A = weight of residue in crucible B = weight of specimen 5. PREPARATION FOR DELIVERY 5.1 Preserva
40、tion, packaging and marking. 5.1.1 Level C.-Tfe supplementary charges (loaded) shall be preserved and packaged in accordance with dwg. 8861645. 5.2 Packing and Marking 5.2.1 Level C.-The cartons (loaded) shall be packed in accordance with dwg. 8861646. 6. NOTES 6.1 Ordering data.-Procurement documen
41、ts shall specify the following: a. b. Title, number and date of this specification. Data cards.-Data cards shall be prepared for each lot in accordance with the information specified in Standard MIL-STD-1167. 6.2 Inspection code numbers.-The digit code numbers assigned to the inspections herein are
42、to facilitate future data collection and analysis by the Government. 6.3 Inspection equipment.-The contractor shall design inspection equipment as required by the Inspection Equipment Lists (EL) in accordance with the instructions of paragraphs 6.3.1 through 6.3.5. 6.3.1 Inspection equipment lists (
43、EL).-Inspection equipment lists indicate the availability of inspection equipment designs by showing in the lnumber“ column of the list of inspection equipment (Form SMUPA 1010) the numbers of drawings or Federal Stock numbers of existing equipment designs, or codes as indicated 10 Licensed by Infor
44、mation Handling Servicesin paraKraph 6.3.2. Desirn action requirec! of the contractor 3.s describe6 in paragraphs 6.3.3 and 6.3.11. The contractor will be required to prepare detailed drawings in accordance w th G. 3.4 for all the equipment codeo as ”Contractor Des3.m in the nunter column. These con
45、tractor desipns must be approved Dy the Governrent prior to fabrication or procuring of tF,e eauipment. Desiyns shall be submltted for approval as specified in 6.3.5. 6.3.2 Inspection equipment lists codes.-The inspection equipment as defined in 6.3.3 and 6.3.4 will be designated in the EL by the fo
46、llowing codes: CD-Contractor design on controlled contractor format and/or commercial ecuippent. MU-Army design, mandatory for use. 6.3.3 Army designs.-Army designs are reflected on detailed drawings which completely depict all the information necessary for the fabrication of the item of inspection
47、eauipment. The contractor need provide 110 desipn when an Amy desicn is listed , fori an item of inspection ecruipment. Army designs fall into two basic classifications ; mandatory (designated “YIJ”) md non- mandatory (indicated by drawing or Federal Stcck Nunher). When an Inspection equipment list
48、references mandatory Arw desinns , the contractor shall comply with, and use these deslws accordingly. The contractor may, however, in connection with non-nandatory designs, and with the approval of the Government, ciesign alternate inspection equipment or use comparable conmercial eauinment to faci
49、litate his operations. Such contractor prepareu desims or commercial equipment selections must be approved by the Government prior to fabrication or procuring of the eciuipment. Desips shall be submitted for approval as specified in 6.3.5. 6.3.4 Contractor designs.-Contractor designs are esigns of inspection equipment for which the Government has assigne? desim responsibility to the contractor. CoRtractor designs shall be supported by detailed drawings which depict all information necessary to completely fabricate, calibrate and operate an itern of insp
