1、MIL-P- i4839 (MU) 9 February 1968 MILITARY SPECIFrI: CATION PROJECTILE, 105MM : SMOKE, BE, M84E1 METAL PARTS ASSEMBLY 1. SCOPE 1.1 This specification covers Projectile, 105MM: SMOKE, BE, M841, Metal Parts Assembly. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of
2、 invitaiAon for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATTONS Military MIL-A- 2550 - Ammunition and Special Weapons, General Specification for STANDARDS Federal Federal Test Method Standard No. i41 - Paint, Varnish, Lacquer and Related
3、 Materials, Method of Inspection, Sampling and Testing. Federal Test Method Standard No. l5l - Metals; Test Methods Military MIL-STD-105 MIL-STD-109 - Quality Assurance Terms and Definit,ions MIL-STD-129 - Sampling Procedures and Tables for Inspection by Attributes - Marking for Shipment and Storage
4、 FSC 1315 . I. THIS DOCUMENT CONTAINS 17 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-L4837 13 m 7779706 0277362 T m 1-P-14839 (MU) 2.1 (contd) . MIL-STD-1167 - Ammunition Data Card MIL-STD- NIL-STD-i169 MIL-STD-i235 - Lot Numbering o
5、f Ammunition - Packaging, Packing and Marking for Shipment - Single and Multilevel Continuous Sampling of Inert Ammunition Components Procedures and Tables for Inspection by Attributes DRAWINGS Munitions Command Di0542988 E-i0542988 F8837835 D8593429 - Projectile, 105MM, SMOKE, BE, 841, - Inspection
6、 Equipment List for projectile, 105m, - Pallet for Fixed and Semi-Fixed Shell - Band Seating Testing Machine Indentor and Test Metal Parts Assembly SMOKE, BE, M841, Metal Parts Assembly Data PUBLICATIONS MUCOM Frankford Arsenal Operating instructions for use of Detroit Testing Machine for Band Seat
7、Inspection (Copies of specifications, standards , drawings and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer . ) 2.2 Other Fub1ications.-The following documents form a part
8、 of this specification to the extent specified herein. the issue in effect on date of invitation for bids or request for proposal shall apply. Unless otherwise indicated, ASA-B46.1 - .American Standards Surface Texture, Surface Roughness , Waviness and Lay Technical society and technical association
9、 specifications and standards are generally vailable for reference from libraries. distributed among technical groups and using Federal agencies. They are also 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-L4B39 13 7979906 0297363 L W 3. RE
10、QUIREMENTS 3.1 General.-Materials, parts and assemblies shall comply with the requirements specified on the applicable drawings, referenced specifications and the following: 3.2 Heat treatment or stress relief.-Heat treatment or stress relief applied to the projectile body shall be uniform throughou
11、t and shall be so conducted as to produce in each projectile body the mechanical properties specified by the applicable drawing. plastic flow without subsequent heat treatment of stress relief is not permitted. Metal forming involving 3.2.1 Hot Forged- Heat treatment method of manufacture.-Projectil
12、e bodies manufactured from forgings shall be subjected to heat treatment to attain the mechanical propertiei specified by the applicable drawing. Heat treatment shall consist of heating above the critical temperature, not to exceed i600 degrees Fahrenheit (OF), followed by an oil quench. quenching,
13、the body forging shall be tempered without delay at a temperature above 750 OF which will produce the required mechanical properties. removal from the tempering furnace, the body forging shall be slowly cooled in air (forced air permitted) to a temperature of not more than 700 OF, after which coolin
14、g may be accelerated by water spray. After After 3.2.2 Cold shaping and hot cup - Cold draw method of manufacture.- Cold working shall be so accomplished as to produce in the projectile body the mechanical properties specified by the applicable drawing. body so formed shall be stress relieved at a t
15、emperature of 700 OF, minimum, following the final forming operation which results in plastic flow. minimum soak time at or above minimum stress relief temperature shall be established which will produce mechanical properties specified by the applicable drawing. anneals prior to the final forming op
16、eration shall be predicated on attainment of required mechanical properties when formed by an approved sequence of operations. The projectile The The temperature and time duration of in process 3.3 Mechanical properties. 3.3.1 Projectile body.-Mechanical properties specified on the applicable drawin
17、g shall apply throughout the projectile body. 3.3.2 the projectile body, the rotating band shall have the following mechanical properties: Rotating band.-After application and subsequent removal from Tensile Strength - 30,000 pounds per square inch (PSI) minimum Elongation - i5 percent minimum in 1
18、inch 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-( MU) 3.4 Rotating band seating. 3.4.1 Band seat cleanliness.-Prior to banding, the band seat shall be clean and free of oil, dirt, grease, rust or other foreign matter, Shot or sand blasti
19、ng is not permitted for cleaning the band seat after knurling . 3.4.2 Application of band blank.-The rotating band blank shall be pressed into the band seat, after final heat treatment of the projectile body. The band blank shall be applied in such manner as not to distort the projectile body. band
20、seat for a minimum of eight-tenths of the band seat depth measured from the outside surface of the projectile body. There shall be no gap between the band and the band seat sidewalls at %he outside surface of the projectile body after the rotating band has been machined to final dimensions. The band
21、 blank must contact the sidewall of the 3.4.3 Rotating band clearance.-The diametrical clearance between the rotating band and the band seat shall not exceed .o06 inch. 3.5 Meta1defects.-All components shall be free from cracks, seams, splits, cold shuts, inclusions, lamination, porosity or similar
22、defects. 3.6 Protective coating. 3.6.1 Body assembly and base plug.-Requirements relative to paint thickness are not specified except as a guide to performance of tests as indicated by the applicable drawings and specifications. Actual component parts must withstand the specified salt spray exposure
23、 with coating breakdown not greater than that described by the applicable specification. 3.6.2 Baffle plate.-All aspects of surface pretreatment or surface coating are as shown by the applicable specification, and are subject to demonstration of control of process thru salt spray test of panels as i
24、ndicated by the applicable specification. 3 7 Functional 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-LLl837 13 7797706 0277365 5 3.7.iMetal parts security.-When tested in accordance with 4.4.5. The Metal projectile assembly shall reveal n
25、o evidence of metal parts failure. parts failure is defined as: 1. 2. 3. Projectile body or base plug deformation attAbutable to noncompliance with drawing or specification requirements. Missing or loose rotating band attributable to noncompliance with drawing or specification requirements, Shear of
26、 rotating band as evidenced by complete lack of engraving, 3.8 Worlmianship .-The requirements for workmanship are as shown on the applicable drawings, in the applicable specifications and the following: 3.8.1 Surface finish.-The requirements for surface finish are as detailed on the applicable comp
27、onent drawing. 3.8.2 Protective coating.-The protective coating shall be in accordance drawing and the specifications listed theron. 3.8.3 Threads.-Threads shall be full and undamaged for the entire minimum length or depth as required by the applicable drawing and shall be in accordance with the pro
28、visions of MTL-A-2550. 3.8.4 Burr.-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. 3.8.5 Foreign matter.-No part or assembly shall contain dirt, grease, chips, oil, rust, corrosion or other forei
29、gn matter. 4, Q?ALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection.-Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements specified herein. fied in the contract or order, the supplier may use his oim or
30、any other facilities suitable for the performance of $he inspection requirements speci- fied herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies
31、 and services conform to prescribed requirements. Except as otherwise speci- 4.1.1 Quality assurance terms and definitions .-Reference shall be made to MTL-STD-109 to define quality assurance terms used. 5 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
32、S-,-,-mL-P-14839( MU) 4.1.2 inspection.-inspection shall be in accordance with MIL-A-2550, except as specified herein. 4.2 First article sample. 4.2.1 initial production sample.-At the beginning of regular production, a sample shall be submitted in accordance with contract requirements and shall con
33、sist of forty metal parts as follows: 30 Metal Parts Assemblies, complete, including paint 5 Metal Parts Assemblies, complete, except paint 5 Sets of Component Parts, unpainted, unassembled, including rotating band blanks. The bodies shall be completely machined, including the rotating band seat. Tw
34、enty-five of the above complete and painted metal parts assemblies shall be forwarded to a designated proving ground for ballistic testing. sample shall be manufactured using the same materials, equipment, processes and procedures, including packaging and packing, as will be used in regular producti
35、on and shall be obtained from the same source of supply. The 4.2.1.1 Examination and test. -After inspection and provisional acceptance at source, the sample shall be inspected for ali requirements of the drawings and specifications at a Government laborator; or such other facility specified in the
36、contract. 4.2.1.2 Initial production sample fdlure.-Failure of the sample to comply with the requirements of the drawings and specifications shall result in sample disapproval. 4.3 inspection provisions. 4.3.1 - Lot. 4.3.1.1 Submission of product.-The product shall be submitted in accordance with MI
37、L-STD-105. 4.3.1.2 Heat treatment lots. -Heat treatment lots shall contain body forgings from not more than one heat of steel that have been heat treated in the same heat ,treating equipment, at the same temperature in one unchanged process. the selection of samples for the tension test hereinafter
38、prescribed. The heat treatment lot thus constituted shall be the basis for 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.1.3 Stress relieved lots.-Stress relieved lots shall contain cold shaped bodies from not more than one heat of steel that
39、 have been cold shaped by the same process, utilizing the same tooling and equipment and are stress relieved at the same temperature for the same length of time. relieved lot thus constituted shall be the basis for the selection of samples for the tension test hereinafter prescribed. The stress 4.3-
40、1.4 Miscellaneous lots.-Small lots (such as bodies manufactured from abnormally small heats of steel or bodies that have become separated from previously delivered lots, etc.) may at the discretion of the supplier by grouped into miscellaneous heat treatment or stress relieved lots as the case may b
41、e. Such lots shall be identified by a miscellaneous lot code number and processed in accordance with either 4.3.1.2 or 4.3.1.3, as applicable. The miscellaneous lot thus constituted shall be the basis for the selection of samples for the tension test hereinafter prescribed. 4.3.1.5 Projectile lots.-
42、When it has been determined that bodies of a heat treated, stress relieved or miscellaneous lot have complied with the mechanical properties requirement of the applicable drawing, they may be re-grouped for assembly into projectile lots, to which will be assigned a projectile lot number in accordanc
43、e With MIL-STD-ll68. shall consist of projectile assemblies produced by one supplier under one contract in one unchanged process, in accordance with the same drawing, same drawing revision, same specification and same specification revision, under conditions of continuous production free from interr
44、uptions other than those due to the end of a shift, day, or workweek. The projectile lot 4.3.2 Examination. -One hundred percent examination shall be performed for all critical defects. performed on a defect basis in accordance with the classification of defects contained herein, using the sampling
45、plans contained in MIL-STD-iOg. An AQL of 0.40 percent for each Major defect and an AQ,L of 0.65 percent for each Minor defect shall be used. Continuous sampling plans in accordance With MIL-STD-1235 may be used if approved by the procuring activity. All may be used in performing visual examination
46、for such defects as cracks, burr and foreign matter. mA-1346.1 shall be used as a basis for surface roughness determination. Examination for Major and Minor shall be nonconforming material shall be rejected. Four power (4X) magnification The roughness comparison specimens prescribed by 4.3.2.1 Body,
47、 Drawtng D10542ggO covering a detail of Drawing Di0342988 Defect Method of Inspection CRITICAL 1. Metal defective Visual Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - _ - . - - - - - - - - - - - -. MIL-P-L4B39 13 999990b 0297368 O MIL- P- 1483 9
48、( MU) 4.3.2.1 (Cont d) Defect _I_ MAJOR Method of Inspection Gage 101. Diameter of rotating band seat Gage 102. Width of rotating band seat 103. Ribs missing from band seat Visual 104. Scoring missing from band seat Visual 105. kridence of sand or shot blast on band seat after scoring Visual MINOR 2
49、01. Location of band seat 202. Foreign matter on band seat Gage Visual 4.3.2.2 Body assembly (prior to painting) Drawing Di0542989 covering a detail of Drawing Dl0542988 CRI: T CAL 1. MAJOR Open band (gap between band and band seat wall) 101. 102. 103. 105. 106. 107. 104. 108. 109. 110 u1. 112. 113. 114. Weight Concentricity of pitch diameter of nose thread with Concentricity of ogive with bourrelet Conc
