1、I MIL-C-50705 12 7777906 0330124 7 U PII1,ITARY SPECIFICATION CHEST: 10548700 ii 1. SCOPE 1.1 quality a Board M18 This specification covers the performance requirements and ssurance provisions for one type of reusable chest for Plotting -/ .+ 2. APPLICABLE DOCUMENTS 2.1 The following documents, of t
2、he issue in effect on date of invitation for bids or request for proposal, form a part of this specifi- cation to the extent specified herein. S PEC IF ICATIONS Mi 1 i tar y MIL- F- 13 9 2 6 FlIL-P-14232 PIIL-T-2 1200 HIL - I - 45 6 O 7 STANDARDS Mi 1 i tary MIL-STD-105 IIIL-STD- 109 MIL-STD- 139 bl
3、IL-STD-810 Fire Control Materiel: General Specifi- cation Governing the Manufacture and Inspect ion of Parts, Equipment and Tools for Army Materiel, Packaging and Packing of Test Equipment for Use with Electronic and Fire Control Systems, General Specification for Inspection Equipment, Acquisition,
4、Disposition and Maintenance of Sampling Procedures and Tables for Quality Assurance Terms and Definitions Marking for Shipment and Storage Environmental Test Methods Inspection by Attributes DRAWIMGS U.S. Army, Frankford Arsenal F105G8700 Chest , 10548700 ,- . d THIS DOCUMENT CONTAINS PAGES, Provide
5、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-(3-50705 (MJ) I (Copies of spccifictions, standards aiid drawings required by the sup- pliers n conncctioii with specific pro-urciiicnt func tians shoii Id ha obtainad roiii tlic! procuring activity or as
6、dircctcd by clid contracting officer. ) 3. REQUIREMENTS 3.1 Materials.- The materials shall be in accordance with draw- ings, material specifications and general specifications forming a part of this specification. 3.2 Fabrication.- The chest shall be manufactured in accordance with Drawing F1054870
7、0 and all drawings pertaining thereto. 3.3 General specification.- The contractor shall be responsible for adherence to the following requirements of MIL-F-13926: (a) Dimensions and tolerances (b) Inorganic protective surface finishes (c) Part identification and marking (d) Workmanship 3.4 Environme
8、ntal. 3.4.1 Storage.- The latched chest assenbly shall show no evidence of distoration, cracks or delamination after having been thermally stabilized at -70F and 160F. 3.4.2 Standard ambient temperature.- Subsequent to meeting the requirement of 3.4.1, the chest shall meet all the requirements of 3.
9、4.4, 3.4.5 and 3.5 at a standard ambient temperature between 60F to 90F. 3.4.3 Extreme operating temperature.- The chest shall meet all the requirements of 3.5.1 and 3.5.2 whilethermally stabilized at -40F and -t15OoF, 3.4.4 Impact resistance.- There shall be no evidence of loose or damaged parts to
10、 either the chest or plotting board as a result of the - chest being dropped on each of the 8 corners and 6 faces from a height of 12 inches IC 2 inches onto a 2 inch k 1/2 inch thick concrete surf.ace. The chest assembly shall not become unlatched as a result of the impacts and shall meet the requi
11、rements of 3.4.5 and 3.5. 3.4.5 Watertightness.- The latched chest assembly with the plotting board installed shall show no evidence of water penetration after being - submerged in 16 f 2 inches of water for 5 5 1 minute. The functioning portion of the breather valves shall be.covered during the wat
12、ertightness test. 3.5 Per formance. 3.5.1 FaSterners.- All catches, hinges, straps, etc. shall function without interference. The externabcatches, when engaged, shall secure I 2 , 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. . - - . - - . . -
13、. - . . . . . . . . _. MIL-C-50705 12 W 7977906 0330326 O W XIL-C-50705 (W) the cover to the body and shi11 displace a uniform compression on the gasketed seal, 3.5.2 Handles,- All handles shall function 1;ithout interference and shall support the latched chest assembly with the Ml8 Plotting Board i
14、nstalled. There shall be no evidence of damage to, or separation of the handle assembly, and the supported load shall cause no damage to the cover or body in the vicinity of the handle attachments or elsewhere. 3.5.3 Interface requirements.- The chest shall interface, support, and retain the M18 Plo
15、tting Board. There shall be no free movement of any of the components after the plotting board components are properly arranged and secured within the chest and the cover is closed and latched to the body. 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection.- Unless otherwise specified
16、 in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any other facili- ties suitable for the performance of the inspection requirements spe
17、cified 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 and services conform to prescribed requirements. 4.1.1 General provisions.- The compo
18、nent and subassembly inspection requirements of MIL-F-13926 form a part of the quality assurance provisions of this specification. Definitions of inspection terms shall be as listed in MIL-STD-109. 4.2 First article (initial production) approval.- The requirement for first article approval and respo
19、nsibility (Government or contractor) for first article testing shall be as specified in the contract. The sample for first article approval tests shall consist of 3 chest assemblies manufactured in the same manner, using the same materials, equipment, processes, and procedures as used in regular pro
20、duction. All parts and materials, including packaging and packing, shall be obtained from the same source of supply as used in regular production. 4.2.1 Government testing.- When the Government is responsible for conducting first article approval tests, the contractor, prior to sub- mitting the samp
21、le to the Governmerit, shall inspect the sample to insure that it conforms to all the requirtsments of the contract and submit a record of this inspection with the sample, including certificates of con- formance for materials. J Provided by IHSNot for ResaleNo reproduction or networking permitted wi
22、thout license from IHS-,-,-MIL-C-50705 (MU) . 4.2.2 Coiitrnctor tcstin5;. -, Wlicn tlic coiitractor is rcspoiisihle Lor conducting Eirst article approval tcsts, tlic srimplc sliall bc iiispectcct by the contractor for all the requircments of- tlic contract. . Th saiiple and a record of this inspecti
23、on, incI.uding certificates of conformance for materials shall be submitted t the Government for approval. The Government reserves the right to witness the contractors inspection. 4 . 3 nspec tion provis ions. 4.3.1 Submission of product.- Unless otherwise specified by the contracting officer, inspe
24、ction lot size, lot formation and presentation of lots shall be in accordance with “Submission of Product“ provisions Of MIL-STD-105 4.3.2 Examination and tests. 4.3.2.1 Components and subassemblies.- All components and sub- assemblies shall be inspected.in accordance with the inspection provisions
25、contained in Supplementary Qualty.Assurance Provisions (SQAP) listed in the technical data package (TDP). . In the absence of SQAPs the applicable Quality Assurance Provisicns of MIL-F-13926 shall apply. Examination and tests related to Section 3 herein shall be performed on a single defect (individ
26、ual characteristic) basis in accordance with MIL-STD-105 and the sampling plans specified in Tables I, II and III herein, Examination and tests for packaging, packing and marking shall be in accordance with MIL-P-14232 and Section 5 herein. The tabulated classification of defects shall constitute th
27、e minimum inspection to be performed by the supplier after first article approval and prior to Government acceptance or rejection by item or lot. TABLE I CLAS SIFICATION CRITICAL: NONE - - MAJOT AQL- 1.6% Defective 101. Fasteners 102, Handles 103. Interface requirements - MTNOR: - . NOTE: REQUIREMEN
28、T TEST PROCEDURE 3.5.1 3.5.2 3.5.3 4.6.3 4.6.7 4.604 . . .- NONE - The tests in Table I shall be conducted at a standard ambient temperature of between 60 and 90.F. . 4.3.3 Acceptance and rejection Rejected lots shall be screened for all defective characteristics. Removal or correction of defective
29、units and resubmittance of rejested lots shall be in accordance with “Acceptance and Rejection as specified in MIL-STD-105. 1 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50705 12 m 999990b 0330228 Y m MIL-(3-50705 (MU) . -*-Luc 4.4 Specia
30、l sampling: 4,4,1 Gciiera1.- Three chests shall be selected at random as a special sampling from each 100 produced. requircmcnts and tests in Table II. The samples shall meet the . TABLE fI I NO . CHARACTERISTIC REQUIREMENT TEST PROCEDURES 301. Materials 3.1 - Per applicable draw- ings and specifi-
31、cations 302. Fabrication 3.2 Drawings - Visual 303. General specification 3.3 MIL-F-13926 - Visual NOTE: The tests in Table II shall be conducted at a-standard ambient % temperature of between 60 and 90F. 4.4.2 Environmental tests.- Three chests shall be selected at random from each 50 produced, or
32、from each months production, whichever occurs first. Each sample shall meet the requirements and tests in Table III and shall then meet the requirements in Table I. . TABLE III - NO, CJ3ARACTERISTIC REQUIRXMENT TEST PROCEDURE 304. Storage temperatures 3.4.1 4.6.1 305. Standard ambient temperature 3.
33、4.2 . 4.6.2 . (60F to 90F) (-40F and 150F) . 306. Extreme temperature operation .3.4.3 , 4.6*2 307. Impact resistance . 3.4.4 4.6.5 308. Watertightness 3.4.5 4.6.6 4.4.3 Failure of sample.- Should any item of a special sampling fail to meet the specified test requirements, acceptance of the product
34、will be suspended by the Government until necessary corrections have been made by the contractor and the resubmitted samples have been approved (see 4.3.3). . 4.5 Inspection equipmc=.- Except as otherwise provided for by the contract, the contractor shall supply and,maintain inspection equip- ment i
35、n accordance with the applicable requirements of MIL-1-45607. 4.5.1 Government furnished inspection equipment.- Where the contract provides for Government furnished test equipment, supply and maintenance of test equipment shall be in accordance with the applicable requirements specified in MIL-1-456
36、07. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50705 12 7777706 0330327 6 m MIL-C;50705 (Mo) 4.5.2 Contractor furnished inspection equipment. 4.5.2.1 Goverriiucnt dcsi gii.- Uirlcss otlicrwisc spccilicd in the con- tract, a11 inspcctioii
37、 c?qiiipnicwt ?;pc?ci.fhl by drciwirii; iiunhcr in spccifi- cations or SQAP foniiing Q pnrt tif tlic crmtract s!inl1 bc supplied by thc contractor in accordance with tccIiiri.cd data listed in thc List of Inspection Documents when provided wikh the Technical Dota Package (TDP) . 4.5,2.2 Contractor d
38、esign.- The contractor shall provide inspection equipment compatible with the “Test Methods and Procedures“ specified in 4.6 of this specification and with the “Component Inspection“ and “Test Facilities“ requirements of MIL-F-13926. Since tolerance of test equip- ment is normally considered to be w
39、ithin 1OOL of the product tolerance for which it is intended, this inherent error in the test equipment design must be considered as part of the prescribed product tolerance limit. in the design of test equipment shall be so selected and controlled as to insure that the .test equipment will reliably
40、 indicate acceptability of a product which does not exceed 90% of the prescribed tolerance limit, and permit positive rejection when non-confrming. Construction shall be such as to facilitate routine calibration of test equipment. . Thus, concept, construction,materials, dimensions and tolerances us
41、ed . 4.6 Test methods and procedures. 4.6.1 Storage temperature.- The chest assemblies shall be exposed to the temperature conditions specified in 3.4.1, utilizing testing equipment in accordance with the “Test Facilities“ requirements of MIL- F-13926. of the chamber reduced gradually to -70F and sh
42、all remain at this temperature for a minimum of 4 hours. temperature shall then be gradually raised to +160F and the chests shall remain at this temperature for a minimum of 4 hours. of this 4 hour period the temperature of the test chamber shall be gradually reduced to room ambient temperature (-%O
43、o to +90F) at which time the chests shall be removed from the test chamber. The chests shall then be subjected to a visual and tactile examination to determine that there is no evidence of distortion, cracks or delamination externally or internally to determine compliance with 3.4.1 and shall then b
44、e tested in accordance with 4.6.3 through 4.6.7 to determine compliance with 3,4.2. The chests shall be placed in the test chamber and the temperature At the completion of this 4 hour period, the At the completion , NOTE: The rate of temperature change in the test chamber shall not exceed 20F per ho
45、ur throughout the temperature cycling tests of 4.6.1 and 4.6.2. 4.6.2 Operating temperature.- The chests shall be exposed to the The temperature conditions specified in 3.4.3, utilizing testing equipment in accordance with the “Test Facilities“ requirements of MIL-F-13926. chests shall be placed in
46、the test chamber and the temperature of the chamber reduced gradually to -40F. erature for a minimum of 4 hours. The chests shall remain at this temp- At the completion of this 4 hour period, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-507
47、05 32 7977906 0330330 2 m and while at -40“ the chests shall he subjected to the tests ir, 4.6.3 and 4.6.4 to determine compliance witii.3.4.3. Upon completion of this test, the temperature of the test chamber shall be raised gradually to +150“F. The chests shall remain at this temperature for a per
48、iod of 4 hours. At the completion of this 4 hour period, and while at +150F, the chests shall again be subjected to the tests in 4.6.3 and 4.6.4 to deter- mine cmpliance with 3.4.3. Upon completion of this test, the temperature of the test chamber shall be gradually reduced to room ambient temperatu
49、re (60“ to +90F) at which time the chests shall be removed from the test chamber. 4.6.3 Fasteners.- Performance of the fastening devices shall be . checked by a functiona! and visual examination when engaged and disengaged a minimum of 5 times, The supporting and securing devices provided in the interior of the chest shall be accessible and receive and secure the asso- ciated item without interference. The cover
