ARMY MIL-DTL-70745 A-2011 STRIP AMMUNITION METALLIC 30 MM.pdf

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1、 AMSC N/A FSC 1305 DISTRIBUTION STATEMENT A. Approved for public release; Distribution is unlimited. Comments, suggestions, or questions on this document should be addressed to: Commander, U.S. Army ARDEC, ATTN: RDAR-QES-E, Picatinny Arsenal, New Jersey 07806-5000, or ardecstdznconus.army.mil. Since

2、 contact information can change, you may want to verify the currency of this address information using the ASSIST online database at https:/assist.daps.dla.mil. MIL-DTL-70745A (AR) 8 December 2011 SUPERSEDING MIL-S-70745 (AR) w/AMENDMENT 3 28 February 1995 DETAIL SPECIFICATION STRIP, AMMUNITION, MET

3、ALLIC 30 MM This specification is approved for use by the US Army Armament, Research, Development and Engineering Center (ARDEC), and is available for use by all Departments and Agencies of the Department of Defense within the distribution limitations noted at the bottom of the page. 1. SCOPE 1.1 Sc

4、ope. This specification contains the requirements for Strip, Ammunition, Metallic 30 Millimeter hereafter referred to as the strip (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not inclu

5、de documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all requirements of documents cited in sections 3 and 4 of t

6、his specification, whether or not they are listed. Reactivated after 8 December 2011 and may be used for new and existing designs and acquisitions. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 2 2.2 Government docume

7、nts. 2.2.1 Specifications and standards. The following specifications, standards and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS

8、MIL-A-48078 - Ammunition, Standard Quality Assurance Provisions, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1168 - Ammunition Lot Numbering and Ammunition Data Card MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product (Copies of these documents are available online a

9、t https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.2.2 Other Government documents, drawings and publications. The following other Government documents, drawings and publications form a part of th

10、is document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) DRAWINGS 11825935 - Cartridge, 30 mm - Dummy M848 12902719 - Strip, Ammunitio

11、n, Metallic, 30 mm 12910289 - Strip Packed (30 mm Metallic Strips) 30 mm Cartridges (Copies of these drawings may be requested online at pica.drawing.requestconus.army.mil or from US Army ARDEC, RDAR-EIS-PE, Picatinny Arsenal, NJ 07806-5000.) 2.3 Non-Government publications. The following documents

12、form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus (Copies of these documents are available f

13、rom ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http:/www.astm.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of conflict between the text of this document and the references cited herein, the text of this document tak

14、es precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 3 3. REQUIREMENTS 3.1 Required inspections

15、. 3.1.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2 and Table II. 3.1.2 Conformance. For each lot a sample shall be subjected to conformance inspection in accordance with 4.3. 3.2 Metallic 30 MM ammunition strip. The strip s

16、hall comply with all requirements in accordance with 12902719. 3.3 Push out. The individual force required to disassemble the nose end of a lightweight 30 mm cartridge family (see 6.8) on 11825935 from the ammunition strip shall be not less than 5 pounds nor greater than 30 pounds. The base of the c

17、artridge does not have to be retained in the rear clip after the push out test. 3.4 Functioning. The strip shall be capable of being assembled with the lightweight 30 mm cartridges family (see 6.8) and cycled through the AH-64 Apache Uploader/Downloader system and the AH-64D Apache Side Loader syste

18、m without binding, cracking, breaking, separating or causing a malfunction of the loading systems. 3.5 Corrosion resistance. The strip shall be finished in accordance with 12902719. When exposed to a 5 percent solution of atomized salt spray for 24 hours, the strip shall exhibit no evidence of corro

19、sion. 3.6 Burrs and sharp surfaces. All surfaces of the strip shall be free of any burr or sharp surfaces which could cause removal of metal from any part of the cartridge. 3.7 Ammunition lot numbering. Ammunition lot numbers shall be assigned in accordance with MIL-STD-1168. 3.8 Workmanship. The pa

20、rts shall be free of defects such as folds, wrinkles, buckles, splits, severe scratches, cuts, dents, perforations, sharp edges, unblended radii, surface defects. All parts and assemblies shall be clean and free of burrs, chips, dirt, grease, oil, corrosion products, and foreign matter. 3.8.1 Metal

21、defects. The strip shall be free of blisters, seams, laminations and porosity. Cracks or tears are not permitted per Figure 3 principal areas. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 4 4. VERIFICATION TABLE I. Requirement/

22、verification cross reference matrix. Methods of Verification 1 Analysis 2 Demonstration 3 Examination 4 Test Classes of Verification A First article B Conformance Section 3 Requirement Description Verification Methods Verification Class Section 4 Method 1 2 3 4 A B 3.1.1 First article X X X 4.2 3.1.

23、2 Conformance X X X 4.3 3.2 Metallic 30mm ammunition strip X X X X 4.3.2.1 3.3 Push out X X X 4.4.1 3.4 Functioning X X 4.4.2 3.5 Corrosion resistance X X X 4.4.3 3.6 Burrs and sharp surfaces X X X 4.4.4 3.7 Ammunition lot numbering X X X 4.6 3.8 Workmanship X X X 4.4.5 3.8.1 Metal defects X X X 4.4

24、.5.1 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) 4.2 First article inspection. When specified, samples of the strip and components shall be subjected to first arti

25、cle inspection in accordance with Table II. 4.2.1 First article rejection. Unless otherwise specified, if any item of the sample fails to comply with the first article requirements, the first article shall be rejected. Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

26、nse from IHS-,-,-MIL-DTL-70745A (AR) 5 TABLE II. First article inspection. Examination or Test No. of Sample Units (bulk strips) Requirement Paragraph Inspection Method Examination for defects Metallic 30mm ammunition strip 252 1/ 3.2 4.3.2.1 Push out 20 3.3 4.4.1 Functioning 200 3.4 4.4.2 Corrosion

27、 resistance 32 3.5 4.4.3 NOTE: 1/ Strips used for examination for defects may be used for push out, functioning, and/or corrosion resistance tests. 4.3 Conformance inspection. 4.3.1 Inspection lot formation. Lot formation shall be in accordance with MIL-STD-1916. 4.3.2 Classification of characterist

28、ics. a. Inspection sampling requirements for critical, major and minor characteristics are defined in MIL-STD-1916. The acceptance criteria for sampling inspection shall be in accordance with the levels provided in the conformance examination/test paragraph and MIL-STD-1916. Unless specified otherwi

29、se, Verification Level VII in addition to 100% inspection shall be used for all characteristics defined as critical. Verification Level IV shall be used for all characteristics defined as majors and Verification Level II for all minor characteristics. b. Conformance inspection shall be performed in

30、accordance with 4.3.2.1. c. The Acceptance Inspection Equipment (AIE) shall be in accordance with MIL-A-48078. AIE shall be capable of repeatable measurements, by various experience inspection/test personnel, to an accuracy of 10% or better of the total tolerance of the characteristics being inspect

31、ed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 6 4.3.2.1 Metallic 30 mm ammunition strip. Drawing Number 12902719 Classification Examination or Test Conformance Criteria Requirement Paragraph Inspection Method CRITICAL None d

32、efined MAJOR 101 Centerline to centerline of clips (10 equal spaces) Level IV 3.2 AIE 102 Hole centerline to edge (2 places) Level IV 3.2 AIE 103 Width of strip (11 places) Level IV 3.2 AIE 104 Hole centerline to outer edge of clip (11 places) Level IV 3.2 AIE 105 Hole centerline to far clip inner e

33、dge (11 places) Level IV 3.2 AIE 106 Hole centerline distance (11 places) Level IV 3.2 AIE 107 Hole centerline to near clip inner edge (11 places) Level IV 3.2 AIE 108 Hole centerline to flange edge (11 places) Level IV 3.2 AIE 109 Material thickness Level IV 3.2 AIE 110 Push out N=20 1/ 3.3 4.4.1 1

34、11 112 Burrs and sharp surfaces Diameter of holes (22 places) Level IV Level IV 3.6 3.2 Visual AIE MINOR 201 Retaining tab to centerline spread (44 places) Level II 3.2 AIE 202 Location to angle center (22 places) Level II 3.2 AIE 203 Clip bend angle (44 places) Level II 3.2 AIE 204 Clip bend radius

35、 (44 places) Level II 3.2 AIE 205 Clip base width Level II 3.2 AIE 206 Heel line angle location at base of clip (22 places) Level II 3.2 AIE 207 Clip closing angle (44 places) Level II 3.2 AIE 208 Clip base width (22 places) Level II 3.2 AIE 209 Clip base to centerline (22 places) Level II 3.2 AIE 2

36、10 Warpage in free space Level II 3.2 AIE 211 Workmanship Level II 3.8 Visual and 4.4.5 NOTE: 1/ Accept on zero, reject on one. 4.4 Methods of inspection. 4.4.1 Push out. A strip (12902719) shall be assembled with M848 dummy cartridges (11825935) in accordance with 12910289 and shall be placed into

37、the test fixture (see Figure 1). In order to test both the front and aft clips, half of the strip samples shall be assembled with M848 dummy cartridges (11825935) and tested with the strip lot number oriented on the right side and the other half of the strips with the lot number on the left side. Th

38、ere shall be no movement of the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 7 dummy cartridges in the strip prior to assembling in the test fixture. A gradual force (without impact loading) shall then be applied to a cartridge

39、 until the nose end has completely separated from the strip. Measurement of the maximum push out force shall be made for compliance with the requirements of 3.3. The strip shall be rigidly supported to have the least amount of movement when the push out force is being applied. The pushed out cartrid

40、ge shall be returned to the strip and the above procedure repeated for all remaining cartridges regardless of the position of a cartridge in the strip. When pushing out the cartridges at either end of the strip the tabs at the end of the strip shall be rigidly supported to have the least amount of m

41、ovement or bending of the strip when the push out force is being applied. FIGURE 1. Push out force test set-up. 4.4.2 Functioning. A strip (12902719) shall be assembled with M848 dummy cartridges (11825935) in accordance with 12910289 and the strip shall be fed through the AH-64D Apache Side Loader

42、system. Then the ammunition shall be downloaded back into the strip using the Side Loader system and subsequently feed into the AH-64 Apache Uploader/Downloader. This test shall be conducted at range ambient temperature. Failure of strip to retain cartridges throughout uploading and/or downloading a

43、nd meet the requirements of 3.4 shall be cause for rejection. 4.4.3 Corrosion resistance. The test shall be conducted in accordance with ASTM B117 and 3.5. Tested parts shall not be returned to the lot. 4.4.4 Burrs and sharp surfaces. Observations shall be made for compliance with the requirements o

44、f 3.6. 4.4.5 Workmanship. The metallic strip shall be examined for compliance with the workmanship requirements as stated in 3.8 and 3.8.1. 4.4.5.1 Metal defects - cracks or tears. AMMO STRIP CARTRIDGE NOSE PUSH OUT FORCE SUPPORT BLOCK FORCE APPLIED HERE SUPPORT BLOCK CARTRIDGE NOSE PUSH OUT FORCE C

45、ARTRIDGE RETAINED IN STRIP CARTRIDGE PUSHED OUT OF STRIP 30 5mm AMMO STRIP LOADED WITH 30MM CARTRIDGES VIEW LOOKING UP Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 8 4.4.5.1.1 Cracks or tears in principal areas. Any visible cra

46、ck or tear in the strip extending through the stock thickness in depth, or a distance in length equal to or greater than the stock thickness shall be classified as a defect (see Figure 2 and Figure 3 Notes 1 and 2). Cracks or tears are not permitted in radii where the clips meet the base part of the

47、 strip (Figure 3 Note 2) FIGURE 2. Example of cracks and tears in principal areas. Note 1: Entire area of clip is designated as a principal area. Note 2: No crack or tear allowed in these 44 radii. FIGURE 3. Definition of principal areas. NOTE 1 NOTE 2: 44 PLACES VIEW OF STRIP FROM RIGHT (OR LEFT) S

48、IDE TOP VIEW OF THE ENTIRE STRIP FRONT VIEW OF ONE CLIP Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-70745A (AR) 9 4.4.5.1.2 Cracks or tears in non-principal areas. All areas not specifically designated in Figure 3 as principal areas are non-principal areas. Any visible crack or tear in the strip extending through the stock thickness in depth, and equal to or greater than the stock thickness in length; or