1、MIL-C-46239C 11 Januarv 1991 SUPERSEDING 15 May 1974 and AMENDMENT 1 14 October 1986 MIL-C-46239B(OS) MILITARY SPECIFICATION CARTRIDGE, IMPULSE, M31A2 ASSEMBLY is specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification co
2、vers the requirements for the M31A2 Impulse Cartridge (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the i
3、ssues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplements thereto, cited in the solicitation (see 6.2). SPECIFICATIONS MILITARY MIL-A-2550 Ammunition, General Specification For Beneficial comments (recommendatio
4、ns, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Ordnance Station, Standardization Branch (3730), Indian Head, Maryland 20640-5000, by using the Standardization Document Improvement Proposal (DD Form 142
5、6) appearing at the end of this document or by letter. AMSC N/A FSC 1377 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILC-46239C a MIL-C-60539 Coating, Anodic, Conv
6、entional For Aluminum And Aluminum Alloy STANDARDS MILITARY MIL-STD- 105 Sampling Procedures And Tables For Inspection By Attributes MIL-STD- 1 O9 Quality Assurance Terms And Definitions MIL-STD-413 Visual Inspection Guide For Elastomeric O-Rings MIL-STD-453 Inspection, Radiographic MIL-STD-8 10 Env
7、ironmental Test Methods however, one primary component production lot may be used in more than one cartridge production lot. 3.4.1.1 Primer. The primer shall conform to the applicable drawing and reference specification. Prior to assembly into a cartridge, the primer shall be visually examined in ac
8、cordance with 4.6.2 and radiographically examined for defects as specified in 4.7.1. 3.4.2 Hardness. The hardness of each component part shall be in accordance with-the applicable drawing (see 4.7.2). 3.4.3 Protective finish, The finish of each component part shall be in accordance with MIL-C-60539
9、and the applicable drawing (see 4.7.3). 3.5 Assembly. 351 Radiographic examination. Each cartridge assembly shall be radiographically examined for defects (see 4.7.4). 3.5.2 Airtightness. Each assembled cartridge shall exhibit no air leakage greater than 1 x lo4 standard cubic centimeters of air per
10、 second at a 14 psia pressure differential (see 4.7.5). 3.53 Vibration. The assembled cartridge shall withstand vibration as prescribed in MIL-STD-810, Method 514.3, Test Procedure I, Test Condition 1-3.2.5 without evidence of any disintegration of the primer, propellant, or igniter, or derangement
11、of any component (see 4.7.7 and 6.2). 3.6 Functional requirements. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-Llb239C 13 79997Ob OLlbb4b5 O MILC-46239C 9 3.6.1 Primer sensitivity. The primer shall fire when drop tested at an energy level
12、 of 120 inch-ounces in a sectioned cartridge void of igniter and propellant charge (see 4.7.8.1). 3.6.2 Cartridge performance. 3.6.2.1 Misfires. The cartridge shall not fail to fire. 3.6.2.2 Ballistics. The cartridge, when fired in an acceptable M3A1 Canopy Remover, shall propel a 300 pound mass hor
13、izontally and shall comply with the requirements of table I. TABLE I. Ballistic reauirements. Temperature Velocity, min Thrust, min Ignition delay time, (“ F) (ftN (lb) max (ms) -60 to -70 20.0 1865 40 65 to 75 20.5 2480 40 195 to 205 22.5 3 120 40 3.6.2.3 Initiation. The remover shall be fired by a
14、 source delivering an output equal to that of an M3A2 Initiator at the end of 10 feet of aircraft hose, MS 28741-4, at 70“ f 5“ F. 3,7 Workmanship. Cartridges shall be free of cracks, splits, or other defects which might prevent proper mating with connecting parts or proper functioning of the device
15、. 3.7.1 Metal defects. All components shall be free from cracks, splits, cold shuts, inclusions, porosity, or any similar defect. 3.7.2 Burr. No part shall have a burr which might interfere with the assembly or function of the item or which might be injurious to personnel handling the item. 3.7.3 Fo
16、reign matter. No part or assembly shall contain chips, dirt, grease, rust, corrosion, or other foreign matter, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all ins
17、pection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Governmen
18、t. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements (see 6.2). l 4 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
19、thout license from IHS-,-,-MIL-C-46239C 4.1.1 Responsibility for compliance, All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection re
20、quirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practic
21、e to ascertain conformance to requirements; however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.1.2 Quality assurance terms and definitions. Reference shall be made to h4IL-STD-1
22、09 to define the quality assurance terms used. 4.1.3 Inspections. Inspections shall be in accordance with MIL-A-2550 and MIL-STD-453, 4.2 Classification of inspections, The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.4) b. Quality conformanc
23、e inspection (see 4.5) 4.3 Inspection conditions. Unless otherwise specified in the contract or purchase order (see 6.2), inspection conditions shall be as follows: a - a. Temperature: Room ambient 20“ to 25“ C (68“ to 77“ F) b. Altitude: Sea level c. Humidity: 50 percent relative, maximum d. Atmosp
24、heric: 14.7 psia 4.4 first article inspection. At the beginning of regular production, the contractor shall submit a first article sample to a Government approved facility for evaluation. The sample shall consist of 21 assembled cartridges for ballistics testing including 12 for vibration tests (to
25、be selected from ballistic samples), 5 assembled cartridges for sealant tests, 10 sets of unassembled components for dimensional and visual examination, and a quantity in accordance with 4.4.2, Le., cartridges assembled without the igniter and propellant charge for primer sensitivity test. The first
26、 article sample shall be manufactured using the same materials, equipment, processes, and procedures as used in regular production. All parts and materials, including packaging and packing, shall be the same as used for regular production and shall be obtained from the same source of supply. When it
27、 becomes necessary to make a change in either the primer, propellant, or igniter lot after initial production, 12 assembled cartridges from the first production lot thereafter shall be tested in accordance with 4.7.7. The Government reserves the right to require new first article samples until such
28、time as an acceptable sample is submitted (see 6.3). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILC-46239C 4.4.1 Examination, tests, and facility. After provisional acceptance at source, the sample shall be inspected for all requirements of t
29、he drawings and specifications at a Government laboratory or other such facility specified in the contract (see 6.2). 4.4.2 Sample size for grimer sensitivity, The number of cartridges assembled without igniter or propellant to be submitted for primer sensitivity tests shall be in accordance with ta
30、ble II. TABLE PI, Primer sensitivitv. Sample Size 3 to 15 4 1 16 to 25 26 to 40 5 41 to 65 7 66 to 110 10 111 to 180 15 181 to 300 25 301 to 500 30 501 to 800 35 II 801 to 1300 I 40 II II Over 1300 I 50 Il 4.4.3 Temperature conditioning for ballistic test. The sample shall be temperature conditioned
31、 and tested to determine compliance with 3.6.2.2. The sample for firing shall be conditioned to table III. TABLE III. Temnerature conditioning. Temperature (O F) Not vibrated Vibrated -60 to -70 3 4 65 to 75 3 4 195 to 205 3 4 Il 4.4.4 First article failure, Failure of the sample to comply with the
32、requirements of the drawings and specifications shall result in first article sample disapproval. i 4.5 Quality conformance inspection. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILC-46239C 4.5.1 Lot, 4.5.1.1 Submission of product. The produc
33、t shall be submitted in accordance with MIL-STD-105. 4.5.1.2 Lot size. The production lot size shall be as specified in the contract (see 6.2). 4.5.2 Examination and tests. The quality conformance sample shall be subjected to the examinations of 4.6 and all the test procedures of 4.7 except for 4.7.
34、7. 4.6 Examination. All cartridges and components shall be examined visually and radiographically and characteristics defined in accordance with the applicable drawings. One hundred percent examination shall be performed for all critical defects, Examination for major or minor defects shall be perfo
35、rmed on a defect basis in accordance with the classification of defects. Inspection for elastomeric O-rings shall be in accordance with MIL-STD-413. Four power (4X) magnification may be used in performing visual examination for such defects as burrs and foreign matter. When compliance is in doubt as
36、 a result of visual inspection, the characteristic shall be measured or gaged to determine acceptability. All nonconforming items shall be rejected. 4.6.1 Cartridge, Impulse, M31A2 Assembly, Drawing 11731602. Characteristic Defect Critica 1 Any part missing 2 Improper assembly 3 Primer not properly
37、seated 4 Metal defective 5 Marking missing, incorrect, or illegible Major 101 102 Crimp missing or improper 103 Sealant missing 104 . Sealant in cavity 105 Foreign matter present Concentricity of head with body Minor 20 1 Diameter, max 202 Diameter of head, max 203 Total length, max 204 Location of
38、datum diameter 205 Varnish missing or inadequate Method of Inspection X-ray/Visual - X-ray/Visual X-rayNisua1 Visual Visual Gage Visual Visual Visual Visual Gage Gage Gage Gage Visual 4.6.2 Primer, Percussion, Drawing 10551686, covering a detail of 11731602. 7 Provided by IHSNot for ResaleNo reprodu
39、ction or networking permitted without license from IHS-,-,-MILC-46239C Characteristic Defect Method of Inspection Critical 1 Improper assembly 2 Any part missing 3 4 Metal defective 5 Primer foil discolored 6 Mixed primers Primer pellet broken, cracked, or dislodged Major 101 Burr 102 Foreign matter
40、 present VisualIX-ray Visual/X-ray Visual Visual Visual Visual Visual Visual 4.6.3 Case, Cartridge, Drawing 11731600, covering a detail of Drawing 11731602. Critical None defined Major 101 102 103 104 105 106 107 108 109 110 Minor 20 1 202 203 204 205 206 207 Concentricity of large diameter with sma
41、ll diameter Diameter of head, min Thickness of base, min Diameter of body, min Thickness of sidewall, min Straightness of base Protective finish inadequate or defective Foreign matter present Burr or sharp corner Metal defective Small diameter, max Large diameter, max Total length Location of datum
42、diameter Thickness of sidewall, max Radius or chamfer missing or incorrect, except as otherwise Surface finish improper classified Gage Gage Gage Gage Gage Gage Visual Visual Visual Visual Gage Gage Gage Gage Gage Visual Visual 4.6.4 Sealing Disc, Drawing 8593494, covering a detail of Drawing 117316
43、02. Critical None defined 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILC-46239C Characteristic Defect Method of Inspection Major 101 Diameter, min 102 103 Metal defective 104 105 Burr 106 Foreign matter present Marking missing, incorrect, or
44、illegible Protective finish inadequate or defective Minor 201 Diameter, max 202 Thickness 203 Varnish missing Gage Visual Visual Visual Visual Visual Gage Gage Visual 4.6.5 Head, Cartridge, Drawing 11731601, covering a detail of Drawing 11731602. Critical None defined Major 101 102 103 104 105 106 1
45、07 108 109 110 Ill 112 113 114 Concentricity of flange with body Concentricity of counterbore with firing plug cavity Concentricity of firing plug cavity with body Concentricity of firing plug cavity with primer percussiong cavity Diameter of counterbore at flange end, max Wail thickness, min Surfac
46、e finish firing plug cavity, primer percussion cavity, and Diameter of firing plug cavity Diameter of percussion primer large cavity Diameter of percussion primer small cavity Metal defective Protective finish inadequate or defective Burr Foreign matter present face of flange Gage Gage Gage Gage Gag
47、e Gage Visual Gage Gage Gage Visual Visual Visual Visual Minor 201 Diameter of counterbore at flange end, min Gage 202 Total length Gage 203 Depth of counterbore at flange end Gage 204 Gage 205 cavity Gage 206 Diameter of body Gage 207 Diameter at rear Gage Depth from flange face to bottom of firing
48、 plug cavity Depth from flange face to bottom of large percussion primer 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I- MIL-C-46237C 13 - 7777706 0466471 b - - - MILC-46239C Characteristic Defect Method of Inspection 208 209 210 21 1 212 213 2
49、14 215 2 16 Width of undercut, rear of percussion primer small cavity Depth from rear face to bottom of igniter cavity Width of undercut, rear of igniter cavity Depth from rear face to start of igniter cavity Width of spring retaining cavity Width of flange Diameter of spring retaining cavity Chamfers and radius missing or incorrect Surface finish improper except as otherwise specified Gage Gage Gage Gage Gage Gage Gage V
