1、MIL-F-4807hA 13 m 7777706 031h008 1 m i 14 MAY 1984-“ . SUPERSEDING 4 il- - : SPECIFICATIONS MILITARY MI L-H- 6 O 8 8 MIL-A-48078 - Heat Treatment of Aluminum Alloys - Ammunition Standard Quality Assurance Provisions, General Specification for MIL-F-48076 (MU) 27 February 1976 MILITARY SPECIFICATION
2、 FIN ASSEMBLY, M158 This specification is approved for use by the U.S. Army Armament Munitions and Chemical Command, and is available for use by all Departments and Agencies for the Department of Defense . 1. SCOPE 1.1 Cope. This specification contains requirements and provides quality assurance pro
3、visions for the Fin Assembly, M158 for use on 81MM Mortar Ammunition. 2. APPLICABLE DOCUMENTS 2.1 Government documents - 2.1.1 Specifications and standards, Unless otherwise specified (see 6r2) , the following specifications and standards of the issue listed in that issue of the Department of Defens
4、e Index of Specifications and Standards (DODISS) specified in the solicitation, form a part of this specification to the extent specified herein. , . . .- z_ FSC 1315 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document sho
5、uld be addressed to: Commander. US Arm Armament Research and Development Center, Attn. DRSMC-QA, Dover, New Jersey 07801 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I I / THIS DOCUMENT CONTAINS PAGES Lic
6、ensed by Information Handling Services- MIL-F-4807bA 13 7799906 031b007 3 I MIL -F- 4 8 O 7 6 A ( AR) STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables MIL-STD-1169 - Packaging, Packing and Marking for Inspection by Attributes for Shipment of Inert Ammunition Components 2.1.2 Other gov
7、ernment documents, drawings and publications. The following other documents, drawings, and publications form a part of this specification to the extent spec i fi ed herein . DRAWINGS (See 6.4) U.S. ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER (ARE 1 9221071 - Fin Assembly, M158 P UBL I CAT I ONS AN
8、SI B46.1 - Surface Texture (Application for copies should be addressed to the American National Standard Institute (ANSI), 1430 Broadway, New York, N.Y. 10018.) ASTM Method E-8 ASTM Method E-340 - Macroetching Metals and Alloys (Application for copies should be addressed to the - Tension Testing of
9、Metallic Materials American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19105). (Technical society and technical association specifications and standards are generally available for reference from libraries. technical groups and using Federal Agencies). publications require
10、d by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer . ) They are also distributed among (Copies of specifications, standards, drawings, and 2 Licensed by Information Handling ServicesMIL-F-076
11、A 13 9797906 031b010 T I MIL-F-48076A (AR) 3.4 Hydrostatic test. - The fin housing shall be able to withstand a hydrostatic load of 17,250 + 250 p.s.i, when tested in accordance with 4.5.4. Each fin-housing that successfully meets the requirements of this test shall be permanently stamed with the le
12、tter “H“ .125 inch maximum height by .O1 inch maximum depth on the outside surface following the nomenclature. 2.1.3 Order of precedence. In the event of a conflict between the text of this specification and references cited herein, (except drawings) the text of this specification shall take precede
13、nce. 3 REQUIREMENTS 3.1 Material. - Materials shall be in accordance with the applicable drawings and specifications. Materials shall not exhibit defects such as cracks, splits, porosity, etc. 3.2 Components and assemblies, - The components and assemblies shall comply with all requirements specified
14、 on drawing (dwg.) 9221071 and associated drawings, and with all requirements specified in applicable specifications and standards. 3.3 Heat treatment. - Heat treatment equipment, proce- . dures and controls shall be in accordance with MIL-H-6088. The material shall be solution heat treated in such
15、a manner as to avoid overheating of the material or cracking during quenching. 3.5 Data requirements. L- - The contractor shall generate data in accordance with the requirements of the data item descriptions cited herein and in 4.5.3.3, and 4.5.4. 3.6 First article inspection. - This specification c
16、ontains provisions for first article inspection. Requirements for the submission of first article samples by the contractor shall be as specified in the contract. 3.7 Wor kmanshin 3.7.1 Metal characteristics. - All components shall be free from cracks, splits, cold flow, shrinkage, cold shuts, pip t
17、ype defects, planar type defects, inclusions, porosity, or any similar characteristics. 3 Licensed by Information Handling ServicesMIL-F-4807bA 13 7777906 03LbOLL L - MIL -F - 4 8 O 7 6 A ( AR) 3.7.2 Threads. - Threads shall be full and undamaged for the entire minimum length or depth as required by
18、 the applicable drawings. 3.7.3 Burrs. - No part shall have a burr which might interfere with the assembly or function of the round or which might be injurious to personnel handling the item. be free of chips, dirt, grease and other foreign matter that may impair proper functioning. The cleaning met
19、hod used shall not be injurious to any of the parts, nor shall the parts be contaminated. 3.7.4 Foreign matter. - All parts and assemblies shall 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection and standard quality -. assurance provisions. - Unless otherwise specified herein or in t
20、he contrct, the provisions of MIL-A-48078 shall apply and are hereby made a part of this detail spcification. 4.2 Classification of - inspections. - The following types of inspections shall be conducted on this item: a. First article inspection b. Quality conformance inspection 4.3 First article ins
21、pection 4.3.1 Submission. - The contractor shall submit a first article sample as designated by the Contracting Officer for evaluation in accordance with the provisions of 4.3.2. The first article sample shall consist of the following items in sample quantities as indicated (See Table 1). Par t d es
22、 cri pt i on Fin Assembly, M158 Fin Housing Housing, prior to drilling of flash holes Increment holder (rear) I ncr ment holder (front ) D r a wi. ngs 9221071 8882167 9212304 9221072 9220708 Quantity - 10 5 5 10 5 5 4 Licensed by Information Handling ServicesMIL -F- 4 8 07 6A (AR ) Following nominal
23、 cropping, one specimen suitable for macroetch testing shall be submitted from the rear of both housing and fin stock. In addition, 4 tensile specimens shall be submitted from fully heat treated material. Two tensile specimens shall be obtained from rolled, extruded, or forged housing material stock
24、 (as applicable), and two specimens shall be-obtained from fin stock. See Table 1, Note a. Microstructure specimens shall be taken from both fin and housing m-aterial stock as described in 4.5.3.2. 4.3.2 Inspections to be Performed - See MIL-A-48078 and Table 1 specified herein. 4.3.3 Rejection - Se
25、e MIL-A-48078. 5 Licensed by Information Handling ServicesH w il c Licensed by Information Handling ServicesMIL-F-4807bA 13 m 77777Ob 0316014 7 - m e H rl m 5 3 .rl (u In cy e . dU m“ 5a, “B E 3 E -. rl O W ri n L O LL I O E v) p c Licensed by Information Handling ServicesMIL-F-807bA Z3 W 7797706 03
26、16022 b W a, D a .4 LI u u m u D C -4 rn X b 8 In cv e -r e -P o a a, c 4 W a, a, z 3.i L) c u .d $1 u Licensed by Information Handling Servicesa, m a ad k c, k a U 4 .d ul In cv -r w . . . dpdp dPdP dpahp LnVI V)VI VIV) WDU) ww ww O0 O0 O0 e. e. .e -I I- O -I n 3 9 -I E O LL O -e t Licensed by Info
27、rmation Handling Servicesm 8 ti d a a a a e a0 a a a a 00000d0000000 a x al 6 u 17 Licensed by Information Handling Servicescv a a, I C U G O u c Fr( rl L -rl W cw W e . a e - _-_- PdPdpdp dPdp ako dP dP*dPdpdP o00 O0 In In InInInInIn PWWQ ecr m wmwmw o00 O0 o o 00000 .a . . .a. 11-1 O ro c I a, I I
28、 !a, O the Government shall not be restricted from testing additional specimens to determine that the mechanical properties conform to drawing requirements. The criteria for performing this test shall be as prescribed by ASTM Method E-8. press-quenched fin stock (only), two specimens total shall be
29、selected as follows: one specimen shall be taken from both the front and rear of each extrusion lot (except areas cropped in accordance with macroetch examination) representing the first and last material respectively which has been extruded and is in accordance with the provisions of 4.4.1.2. Speci
30、mens from fin lots made by solution heat treatment following extrusion (only) shall be taken as follows: two specimens total shall be selected; one shall be taken from the hottest zone and the other from the coldest zone of each solution heat treatment batch which is a part of a lot in accordance wi
31、th the provisions of 4.4.1.2. Failure of any tension test specimen to comply with the yield strength or elongation requirements of the applicable drawing shall k cause for rejection of the lot. Specimens taken shall conform to the largest obtainable flat type specimen as prescribed by ASTM Method E-
32、8 and approved by the procuring agency; the Government shall not be restricted from testing additional specimens to determine that the mechanical properties conform to drawing requirements. The criteria for performing this test shall be prescribed by ASTM Method E-8. 4.5.3.1.2 Fin stock extrusion lo
33、ts. From 4.5.3.2 Microstructure examination. - From each of the -.-e- - specimens submitted for tension testing in 4.5.3.1. and 4.3.1, one wafer, approximately one-half inch in length shall be cut longitudinally and prepared for metallographic 22 Licensed by Information Handling Services4.5.5 MIL-F-
34、Y807bA 13 E 7797706 0316030 5 m MIL -F - 4 8 O 7 6 A ( AR ) examination. When so prepared, the specimen shall be etched with Kellers reagent and examined for metallurgical defects by scanning under a suitable microscope at a minimum magnification of 500 diameters . Overheating shall be evidenced by
35、the presence of rosettes in the microstructure or incipient melting at the grain boundaries (see 6.5) . Evidence of the above shall cause rejection of the representative solution heat treatment batch. 4.5.3.3 Quality inspection report. - The contractor shall submit a quality inspection test, demonst
36、ration, and evaluation report in accordance with Data Item Description Di-R-1724 (tailored) giving the detailed test results from the above tests (4.5.3.1 and 4.5.3.2). 4.5.4 Hydrostatic test. - After final machining but prior to drilling flash holes and prior to gaging, each cartridge housing shall
37、 be subjected to a hydrostatic test to determine compliance with the requirements of 3.4 and 3.7.1. Failure to meet the requirements of 3.4 and 3.7.1 shall be cause for rejection of the housing. The housing shall be tested using equipment capable of performing the test accurately and consistently. I
38、n performing the test, the pressure will be applied gradually until the required minimum pressure is reached and held for three seconds. The equipment shall be calibrated prior to the start of each days operation and at intervals of not over 4 hours of continuous operation. It shall also be calibrat
39、ed prior to restarting the operation aftei: a lay-off of three hours or more. If it has been found that the equipment is out of calibration in such a direction that the pressure was actually lower than required, the housings tested since the last satisfactory calibration shall be retested after the
40、calibration error has been corrected. Rupture, cracking, or bulging shall be evidence of failure and cause for rejection of the housing. Each housing which has successfully passed the test shall be stamped in accordance with 3.4. The contractor shall submit a monthly quality defect report in accorda
41、nce with Data Item Description DI-R-1721 summarizing the defects found. Flash hole inspection 4.5.5.1 Missing flash holes. - Each fin housing shall be inspected by a non-visual system capable of determining the presence of the required number of flash holes (see drawing). 23 Licensed by Information
42、Handling Services4.5.5.2 Excess flash holes. - Each fin housing shall be inspected by method capable of determining the presence of flash holes in excess of the drawing requirement. 4.5.6 - Torque test. - Random samples supplied in accordance with 4.4.2.7 shall be tested by applying the required ass
43、embly torque to the fin in the direction of assembly before the thread sealing compound has set. Any perceptible movement of any fin will be considered as failure of the assembly to comply with the drawing requirement and shall be cause for 100% back inspection to the last successful test. The joint
44、 shall be marked to provide a means for detection of movement of the fin with respect to the cartridge housing. After testing, the parts shall be set aside for disassembly testing after the thread sealing compound has cured. The torque test shall be performed daily. 4.5.7 Sealing compund test. - Thi
45、s test shall be performed daily after the random samples used for the torque test are set aside to allow the thread sealing compound to cure. An additional set of 3 samples shall be taken if a new batch of sealing compound is used after the days production has started. The samples supplied in accord
46、ance with 4.4.2.7 shall !E tested by applying 225 + 25 in-lbs disassembly torque to the fins after the thread sealing compound has cured. Any perceptible movement of any fin shall be cause for rejection of the sealing compound mix. If the movement occured as the result of inadequate application of s
47、ealing compound, 100% back inspection to the last successful test shall be performed. 5. PACKAGING 5.1 Packaging, packing and marking. - Packaging, - packing and marking shall be in accordance with the require- ments of level C in MIL-STD-1169. 6. NOTES 6.1 Intended use. - The compnents covered by t
48、his specification are intended for use on the mortar, 81MM, Illuminating, M301A3. This is a pressure vessel application. The contractor may find it cost effective to perform additional non-destructive inspections (such as ultrasonic inspection) of the bar stock prior to machining and hydrostatic tes
49、ting. Costs incurred as the result of 24 Licensed by Information Handling ServicesMIL-F-l8076A 33 m 7999906 0336032 7 MIL -F- 4 80 7 6A ( AR) additional tests shall not be reimbursed by -t.heGovernment. In no cace shall the performance of additional tests relieve the contractor from complying with any of the regular test requirements contained in this specification. 6.2 Ordering data. - See MIL-A-48078. 6.3 Submission e- of inspection equipment for design approvals. - See MIL-A-48078. Submit designs as required to Canmander , U.S. Army Ar
