1、I - 1 MIL-C-85257 33 9999906 0364386 L I - - -c- - MIL-C-85257(AS) 53 June 1981 - , MILITARY SPECIFICATION CORD ASSEMBLY, DETONATING . - . This specification is approved for use by the Naval Air Systems Command, Department of the Wavy, and is available for use by all Departments and Agencies of the
2、Department of Defense. 1. SCOPE. 1.1 Scope. This specification establishes the requirements for manufacture and acceptance of the detonating cord assembly criti- cal item, hereinafter referred to as the assembly. 2, APPLICABLE DOCMENTS . 2.1 Issues of documents. The following documents of the issues
3、 in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent speoified herein. SPECIFICATIONS FEDERAL QQ-A-225/6 Aluminum Alloy Bar, Rod, and Wire, Rolled, Drawn, or Cold Finished, 2024. _-_ . - _u- -. .-. . . - - Beneficial comments (recommendat
4、ions, additions, -deletions) and 1 ,any pertinent data which may be of use in improving this document I !should be addressed to: Commanding Officer, Naval Air Engineering I kenter, Engineering Specifications and Standards Department I(ESSD), Code 93, Lakehurst, NJ 08733, by using the self-addressed
5、Standardization Document Improvement Proposal (DD Form 1426) .appearing at the end of this document, or by I_ letter. - . I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C.-85257 13 m 777770b 03611387 3 MILITARY MIL-B-85251 STANDARDS FEDERAL FE
6、D-STD-102 MILITARY MIL-STD-105 MIL-STD-109 MIL-STD-129 MIL- STD- 33 1 MIL-STD-453 Iil I L - STD - 8 1 O MIL-STD-1168 MIL-STD-45662 Bomb, Binary Chemical, BLU-8O/B. Preservation, Packaging and Packing Levels. Sampling Procedures and Tables for Inspection by Attributes. Quality Assurance Terms and Def
7、initions. Marking for Shipment and Storage. Fuze and Fuze Components, Environ- mental and Performance Tests for. Radiographic Inspection. Environmental Test Methods. Ammunition Lot Numbering. Calibration System Requirements. DRAWINGS Naval Air Systems Command (Code Ident 30003) X49 006 7 6 Cord Asse
8、mbly, Detonating. (Copies of specifications, standards, drawings, and publications required by contractors in connection with specified procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2 Provided by IHSNot for ResaleNo reproduction or n
9、etworking permitted without license from IHS-,-,-MIL-C-5257 13 = 7999906 0364388 5 c 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. cated, the issue in effect on date of invitation for bids or request for proposal shall apply. Unless
10、 otherwise indi- DEPARTMENT OF TRANSPORTATION Code of Federal Regulations 49 CFR 171-178 Transportation. (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20402.) American Society for Testing and Materials ASTM-E498-73 ASTM-E
11、499-73 ASTM-F78-71 (Applications for copies shou for Testing and Materials, 1916 3. REQUIREMENTS. Standard Methods of Testing for Leaks Using the Mass Spectrometer Leak Detector or Residual Gas Analyzer in the Tracer Probe Mode. Standard Methods of Testing for Leaks Using the Mass Spectrometer Leak
12、Detector in the Detector Probe Mode. Standard Method for Calibration of Helium Leak Detectors by use of Secondary Standards. d be addressed to the American Society Race Street, Philadelphia, PA 19103.) 3.1 Item description. The assembly consists of four mild detonating cords affixed into an aluminum
13、 sleeve with a common initiating charge and cover. cover. The opposite end of each cord has an output charge and 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85Z57 13 7779706 0364387 7 i NIL-c-85 2 5 7 ( AS 3.2 Characteristics. 3.2.1 Perf
14、ormance. 3.2.1.1 Initiation and output. When the assembly is initiated with a MARK 339 MOD 1 Fuze or an approved equivalent energy source, all four boosters shall detonate and the output of each booster shall be sufficient to produce a minimum dent 0.013 inch deep in a steel witness plate (see Figur
15、e i). 3.2.1.2 Temperature shock. “he assembly shall withstand alternating exposure to temperatures of -48 degrees Celsius (OC) for 90 minutes, +75OC for 30 minutes, and +254OC for 10 minutes without degradation of performance, when tested at +155OC, and shall not constitute a safety hazard after exp
16、osure to temperature shock. 3.2.1.3 Low temperature. The assembly shall withstand exposure to a temperature of -62C for 14 days without degradation of perf ormance. 3.2.1.4 HirJh temperature (storage). The assembly shall withstand exposure to a temperature of +74OC for 14 days without degradation of
17、 performance. 3.2.1.5 High temperature (safetv). The assembly shall withstand exposure to a temperature of +99OC for 2 hours followed by +280OC for 30 minutes without constituting a safety hazard and shall not detonate, deflagrate, or burn. 3.3 Design and construction. 3.3.1 Production drawings. The
18、 assembly shall be fabricated and assembled in accordance with the drawings, parts lists, and other documents listed on Drawing X4900676 and as specified herein. 3.3.1.2 Mechanical integritv. Each assembly shall be free from voids, inclusions, or impurities in any of the explosive compo- nents and t
19、he internal construction of the assembly shall conform to Drawing X4900676. 3.3.1.3 Leak rate, Each assembly shall have a leak rate of less than 1x105 atmospheric cubic centimeters of helium per second at a differential pressure of 1 atmosphere and a temperature of +25 - +5oc. 4 Provided by IHSNot f
20、or ResaleNo reproduction or networking permitted without license from IHS-,-,- - - MIL-C-85257 33 m 7777706 0364370 3 U.2J MIL- C- 85 2 5 7 ( AS 1 I 1 ,.-. _- ./- t KY- -*- ,/- I l .r. 1 I I i i 1 I 1 2.0 i 0.; I MATERIAL: AISI 1018 OR 1020 COLD ROLLED FARDNESS: ROCKWELL B70-590 FIGURE 1. Witness pl
21、ate. iN. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - VIL-C-85257 13 M 777770b 0364173 5 M MIL-C-85257 (AS) 3.3.2 Standards of manufacture. 3.3.2.1 Certification. When specified in the contract or purchase order (see 6.2.2), the contractor sh
22、all include written certification, accompanied by objective quality evidence as defined in MIL-STD-109, that the materials, processes, and parts used in the assembly meet the applicable requirements for each item. F 3.3.2.2 Working environnient. Any special working environments for the manufacture o
23、f the assemblies shall be as specified in MIL-B-85251. 3.3.2.3 Manufacturing processes aiid procedures. When specified in the contract or purchase order (see 6.2.2), the contractor shall pre- pare, in the contractors own format, written procedures covering the detailed equipment and process requirem
24、ents and procedures which the contractor proposes to use and does use in the manufacture of assemblies to this specification. Copies of such work instructions, together with referenced documents, shall be made available to the procuring activity in the manner specified in the contract or purchase or
25、der. Examination and review of such documents will not constitute technical approval by the procuring activity, but will evidence only that the documents exist and are in sufficient detail to describe the process and procedures used in the manufacture of assemblies to this specification. 3.4 First a
26、rticle. Unless otherwise specified in the contract or purchase order, the contractor shall funish a preproduction sample of 15 assemblies to the testing activity designated in the contract or pur- chase order for first article inspection and approval (see 4.1.2.1 and 6.2.1). The preproduction sample
27、 shall be manufactured using the same methods, materials, processes and procedures proposed for production. Any production prior to acceptance of the preproduction sample is at the risk of the contractor. After approval of the preproduction sample, changes in material, parts, procedures, design, or
28、processes, may be cause for resubmission of a preproduction sample. 3.4.1 Retest. At the discretion of the procuring activity, preproduc- tion tests, or any portion thereof shall be repeated under any of the following conditions: a. The manufacturer has modified the product (such as a change of raw
29、materials, processes, production procedures, or methods). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85257 (AS) b. Where there is evidence that the quality of the product has not been maintained. accumulated product failures, of systems
30、failures attribut- able to the product, or failure of the product to pass any of the tests for production lot acceptance that may be con- ducted by or foi- the procuring activity. This evidence may be in the form of c. When applicable documents have been amended or revised sufficiently so that conti
31、nued validity of the previous preproduction testing is questionable. d. When manufacturer has not produced assemblies to this speci- fication for a period of 12 months or longer. e. When the manufacturer changes the location at which cord assemblies are provided. 3.5 Documentation. When specified in
32、 the contract or purchase order (see 6.2,2), inspection reports shall be prepared as specified in 4.1.2.2 and 4.2.4. 3.6 Workmanship. The device shall be fabricated in a manner that will ensure compliance with all requirements of this specification and the assembly drawing. All parts shall be free f
33、rom chips, dirt, grease, rust and other foreign materials. imperfections of manufacture which will adversely effect the assembly, safety, or functioning of the product. The cleaning methods used shall not be injurious to any of the parts, nor shall the parts be contaminated by the cleaning agents us
34、ed. Assembly shall proceed in a careful, neat, and orderly manner to prevent either damage to the parts, or the inclusion of foreign materials and defective or marginal parts and subassemblies. There shall be no burrs or other 4. QUALITY ASSURANCE PROVISIONS. 4.1 Responsibility for inspection. Unles
35、s otherwise specified in the contract or purchase order (see 6.2.1), the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order (see 6.2.1), the contractor may use his own or any other faciliti
36、es suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. to perform any of the inspections set forth in this specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements
37、. The Government reserves the right 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-c-85 25 7 (AS ) 4.1.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Preproduction inspections (see 4
38、.1.2.1). b. Quality conformance inspections (see 4.2). 4.1.2 Special tests and examinations. , 4.1.2.1 Preproduction inspections. Preproduction inspections shall be conducted on the preproduction sample (see 3.4.1) and shall consist of the examinations and tests of Table I in the order shown. 4.1.2.
39、1.1 Acceptance criteria. The failure of one or more assemblies to pass any of the preproduction tests shall cause rejection of all preproduction samples. TABLE I. Preproduction inspections. Examination or test Grouo I (10 units) Visual/radiographic/ leakage inspection Low temperature High temperatur
40、e (storage) Temperature shock/initiation and output Grouu II High temperature (safety) - 5 units Requirement paragraph 3.3.1, 3.3.1.2, 3.3.1.3, 3.6 3.2.1.3 3.2.1.4 3.2.1.2 3.2.1.5 Method paragraph 4.4.1, 4.4.2, 4.4.7 4.4.4 4.4.5 . 4.4.3 4.4.6 8 Provided by IHSNot for ResaleNo reproduction or network
41、ing permitted without license from IHS-,-,-4.1.2.2 Preproduction inspection report. When specified in the con- tract or purchase order (see 6.2.2), results of the preproduction inspec- tions shall be,prepared for the procuring activity. The report shall contain the following information accompanied
42、by a certification (see 6.2.2) which attests that the information provided is correct and appli- cable to the product being submitted: a. b. C. d. e. f. A statement that the preproduction sample complies with all quality assurance provisions of this specification for the assembly. Number of units of
43、 product inspected. Results. obtained for all inspections performed, including copies of data on dent depths. Contract or purchase order number and date, together with an identification and date of changes. Certificates of compliance of all material procured directly by the contractor. Date submitte
44、d. The certification shall be signed by a responsible agent of the certify- ing organization. The initial certification shall be substantiated by evidence of the agents authority to bind his principal. Substantiation of the agents authority will not be required with subsequent certifi- cations unles
45、s, during the course of the contract, this authority is vested in another agent of the certifying organization. 4.2 Quality conformance inspections. Quality conformance inspections shall be performed on each inspection lot and shall consist of the examinations and tests listed in Table II in the seq
46、uence shown. 4.2.1 Inspection lot definition. Inspection lot definition shall be An inspection lot shall be formed from in accordance with MIL-STD-105. assemblies which have passed Group I inspections. An inspection lot shall not contain more than 200 assemblies. Lot numbering shall be in accordance
47、 with MIL-STD-1168. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- . MIL-C-85257 13 7977706 03611395 2. TABLE II. Quality conformance inspections. Examination or test Group I (100%) Visual/radiographic/ leakage inspection Group II (sample) Temp
48、erature shock/initiation and output Requirement paragraph Method paragraph 3.3.1, 3.3.1.2, 4.4.1, 4.4.2, 3.3.1.3, 3.6 4.4.7 3.2.1.1, 3.2.1.2 4.4.3 I I 4.2.2 Sample. A sample of 15 assemblies shall be randomly selected from each inspection lot for Group II quality conformance inspections. 4.2.3 Accep
49、tance criteria. Failure of one or more assemblies in the sample to pass any of the Group II quality conformance inspections shall cause rejection of the inspection lot represented. 4.2.4 Quality conformance inspection report. When specified in the contract or purchase order (see 6.2.2): results of the quality conform- ance inspections shall
