1、MIL-C- 50242(MU) 4 August 1971 (See 6.5) - _. MILITARY SPECIFICATION CARTRIDGE, 40MM, HE, M383; BODY ASSEMBLY FOR METAL PARTS 1. SCOPE 1.1 This speciffcation covers the metal parts for one type of body assembly designated as Body Assembly for Cartridge, 4OMM, HE, M383. 2. APPLICABLE DOCUMENTS 2.1 Th
2、e following documents of the issue in effect on date of invita- tion for bids or request for proposal, form a part of this specification to ._ the extent specified herein: SPECIFICATIONS . .I - ?L FEDERAL ! :. =r -? . 7, . - Quality Assmance Terms and , Definitions - Lot Numbering of Ammunition - Pa
3、cking, Packaging and Marking for Shipment of Inert Ammunition Components - Single and Multilevel Continuous Sampling Procedures and Tables for Inspection by Attributes . U.S. Army Munitions Command 9238908 - . Body Assembly PUBLICATIONS- AFNY ET 9238908 Equipment Tabulation (Copies of specifications
4、, 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 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
5、,- . . MIL-C-50242 13 m 99797Ob 0325794 5 m . 3. REQUIREMENTS 3.1 Material.- Materials shall be in accordance with the applicable drawings and specification. on Drawing-) 9238908 specified in applicable specifications. 3.2 Parts.- The parts shall comply with all requirements specified all associated
6、 drawings , and with all requirements 3.3 Workmanship.- All parts and assemblies shall be fabricated and finished - in a thorough, workmanlike manner. edges, cracks, unblended radii, surface defects, dirt, grease, rust, corrosion products, and other foreign matter. The cleaning method used shall not
7、 be in- jurious to any parts, nor shall the parts be contaminated by the cleaning agents. All marking and stamping shall be neat and sharply defined. They shall be free of burrs, chips, sharp 3.4 Submission of results of contractor-conducted examinations and tests. The contractor shall forward copie
8、s of the results of any of his examinations or tests to the designated address as required by the contract. (See 6.4) 3.5 First article testing.-This specification makes provisions for first Submission of first article quantity by the contractor shall nolled by Government or comercial specifications
9、 referenced in any of the contractual documents, and that certificates of conformance are on file and available for review. d. Number of items in the lot. e. Date submitted. The certificate shall be signed by a responsible agent of the certifying organization. evidence of the agents authority to bin
10、d his principal. the agents authority will not be required with subsequent ceptificates unless, during the course of thecontract, this authority is vested in another agent of the certifying organization. The initiai certificate submitted shall be substantiated by Substantiation of 4.2 First article
11、inspection. 4.2.1 Submission.- The- contractor shall submit a first article quantity as designated by the Contracting Officer for evaluation in accordance with the provisions of 4.2.2. The first article sample shall consist of the following: (See 6.1) i .- =i .- a. b. C. Forty-five (45) body assembl
12、ies after painting. (5 for salt spray) Twenty (20) body assemblies prior to painting, Two (2) stock specimens, each comprised of the width of the stock to be used for production, and the length, equivalent to the circumference of the tool to be utilized for production, shall be selected from the coi
13、l of stock prior to forming the top cup and bottom cup. One sample shall be taken from the beginning of the coil; the other sample shall be taken from the end of the coil. Each specimen shall be identified for the direction of rolling and identified with an index position of the tool. The first arti
14、cle sample shall be submitted and approved prior to initiation of regular production. All parts and completed assemblies submitted shall have been produced by the . contractor (or furnished by a supplier) using the same production processes, procedures and equipment as will be used in fulfilling the
15、 contract, papts and materials, including packaging and packing, shall be obtained from the same sources of supply as will be used in regular production. The sample shall be accompanied by certificates of conformance. A first article quantity, or portion thereof, as directed by the Contracting Offic
16、er, shall also be submitted whenever there is a lapse in production for a period in excess of 90 days, or whenever a change occurs in manufacturing process, material used, drawing, Specification or source of supply as to significantly affect product uniformity as determined by the Government. contra
17、ctorshall inspect the sample to the degree necessary to assure that it conforms to the requirements of the contract and submit a record of this A sample containing known defects will not be submitted unless.specifically authorized by the Contracting Officer. AU Prior to submission, the .inspection w
18、ith the sample. 4 - Te L-r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1. -. MIL-C-50242 13 9979706 0325796 7 9 . ., 4.2.2 Inspections to be performed.- Assemblies and components will be subjected by the Government to any or all the examinations
19、or tests specified in this specification and any or all requirements of the applicable drawings. 4.2.3 Rejection.- If any assembly or component fails to comply with any of the applicable requirements , the first article quantity shall be rejected. The Government reserves the right to terminate its i
20、nspection upon any failure of an assembly or component in the sample to comply with any of the stated requirements. In the event .of rejection, the Government reserves the right to require the contractor to take corrective action and submit a new first article quantity or portion thereof. . Until a
21、?irst article quantity is accepted, the cantractor is in no way authorized by the Government to resume regular production unless otherwise directed by the Contracting Officer. 4.3 Inspection provisions 4.3.1 Lot formation.- The term “inspection lot“ as used in this specification is defined as an ess
22、entially homogeneous collection of units of product from which a representative sample is drawn and inspected to determine conformance with applicable requirements, The sample selected shall represent only that quantity of units from which the sample was drawn and shall not be construed to represent
23、 any prior or.subsequent quantities presented for inspection. Homogeneity shall be considered to exist provided the inspection lot has been produced by one manufacturer.$ in one unchanged process, in accordance with the . same drawing, same drawing reyision, same specification and same specification
24、 revision and complies with the provisions for submission of product as specified in MIL-STD-105. safety, performance, interchangeability, or storage, as determined by the Govern- ment, shall not be deemed-to alter the homogeneity of an inspection lot. All material submitted for inspection in accord
25、ance with this specification shall comply with the homogeneity criteria specified herein regardless of the type of sampling procedure which is being applied to determine conformance with requirements. Lot numbeking, as required, shall be in accordance with MIL-STD-1168. Changes to process, specifica
26、tion, or drawing not affecting 4.3.2 Examination.- The examinations listed in the following subparagraphs shall be performed on inspection lots (See 4.3.1) of the components or assemblies designated in the applicable paragraph headings. (and major defects, when so specified) shall be 100 percent, ma
27、jor and minor defects shall be in accordance with MIL-STD-105 except that continuous sampling plans in accordance with MIL-STD-1235 may be used if approved by the Government. groups of major and minor defects listed, the contractor may elect to apply AQLs to individual defects using an AQL of 0.40 p
28、ercent for each major defect and an AQL of 0.65 percent for each minor defect. When this method is elected, it shall be applied to all of the major and minor defects listid in the applicable subparagraph- of this section, except where00 percent inspectin is specified, and be documented as part of th
29、e contractors inspection system. performance of the inspections listed shall be in.accordance with 4.3.4. Inspection for critical defects ; Sampling plans for Instead of applying the AQLs designated herein to the Equipment necessary for the Provided by IHSNot for ResaleNo reproduction or networking
30、permitted without license from IHS-,-,-.i 1 NIL-C-502V2 13 m 777770b 0325777 O m . _. HIL-C-50242MU) . 4.3.2.1 Body (See Dwg. 9238907 covering a detail of Dwg. 9238908). Categories Defects Method of Inspection Code No. Critical: None Defined. Major : 100 Inspection 101. Presence of cracks, voids, pi
31、pes or inclusions, etc. Test (See 4.4.4) o1001 Minor : AQL 1.50 Percent 201. Diameter of rotating band 202. Width of rotating band 203. Evidence of poor work- (See 4.3.3.1) surface (after knurling) Gage 01002 surface Gage 01003 manchip (See 3.3) Visual 01004 4.3.2.2 Body Assembly, prior to painting
32、(See Dwg. 9238908). Categories Defects Method of Code No. Inspection Critical: None Defined. Major : 101. 102. 103. AQL 1.00 Percent Pitch diameter of thread Minor diameter of thread Concentricity-of indicat- ed point on taper with large outside diameter Large outside diameter Location basic diamete
33、r on taper Length from open end to back boss Concentricity at indicated lengths on body with pitch diameter of thread includ- ing perpendicularity Concentricity of rotat- ing bands with pitch diameter of thread Diameter of sealing groove Parallelism back of rotat- ing bands with pitch diameter of th
34、read Gage Gage 02001 02002 . 02003 02004 Gage Gage 104. 105. Gage , Gage 02005 106. 107. 02006 , Gage 02007 108. _. .- Gage Gage 02008 02009 109. 110. Gage o. 02010 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-111. Profile of rotating bands Gage
35、 O2011 Minor : AQL 1.50 Percent 202. Distance from open end 203. Length of full thread, 204. Evidence of poor work- 201, Total length Gage 02012 , to back of rotating band Gage 02013 . min. Gage 02104 manship (See 3.3) Visual 02105 4.3.2.3 Body assembly after painting (See Dwg. 9238908). Cat egories
36、 Defects Method of Inspec tion Code No. -_ Critical : None Defined e Major : AQL 0.65 Percent 101. Body diameter 102. Diameter of rotating bands 103. Diameter between bands Minor: AQL 1.00 Percent 201. Red primer on inside surface missing 202. Color incorrect 4.3.3 Testing. Gage Gage Gage Visual Vis
37、ual 03001 03002 03003 03004 03005 4.3.3.1 Dimensional control of stamped parts.- In place of the normal . sampling associated with the Classification of Defects, and with the approval of the Contracting Officer, a sample of at least ten (10) parts may be dimensionally inspected ty qualify the tool u
38、sed in the stamping process for use in production. In addition, a random sample of five (5) parts shall be selected from the last portion of.each hours production for dimensional inspection as a control of the tool during production. tool producing the defective part shall not be used in production.
39、 of the tool, the tool producing the defective part shall be removed from production. Surther, that portion of production since the last tool control check shall be re- turned to the contractor for corrective action. If any defective parts are found during qualification of the tool, the If any defec
40、tive parts are found when inspection is performed for control All tools removed from production because of some fault, may, after reworking, be returned to production providing they pass the qualification test above. contractor may request a change of inspection frequency providing he presents objec
41、tive evidence to the Contracting Officer to substantiate the request. The 7 -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.3.2 Dimensional inspection of stock specimen (See Dwg. 9238907), Major Defect, Code No. 04001.- Two (2) stock specimens
42、 shall be taken from each coil of finished stock just prior to forming the body. . The width of . each specimen shall be the width of the stock, and the length shall be as necessary to obtain the total surface area of the tool to be used in pro- duction. One (i) specimen shall be taken from the begi
43、nning of the coil and the other specimen shall be taken from the end of the coil. specimen shall be taken whenever a new, repaired, or altered tool is entered into production. the tool and for the direction of travel of the stock with respect to the tool. The specimens shall also be identified as be
44、ing from the beginning or end of the coil, If, for any specimen, the average value of fifteen (15) measurements for the total thickness dimension and the depth dimension fails to comply; or if the direction of tool travel does not comply with the applicable drawing requirements, the coil, or portion
45、 thereof, from which the specimen was taken, shall be rejected. In addition, the tool which produced the rejected specinen shall be removed from production, shal be rejected. The dimensional inspection shall be performed as specified in 4.4,1, using equipment in accordance with 4.3.4. shall be cejec
46、ted to dimensional inspection of all stock dimensions specified on the applicable drawings, The tool shall not be used in production until dimensional compliance with the drawing requirements has been determined front the specimen produced.by the tool. An additional Each specimen shall be identified
47、 with an index position on . All bodies produced from the rejected coil The specimen from the new, repaired, or adjusted tool entering production Fifteen (15) readings shall be taken for each dimension. . 4.3b3.3 Salt spray (See Dwg. 9238908), Major defect, Code No,. 05001.- Sampling and rejection c
48、riteria shall be in accordance with soecification TT-C-490. required for inside surface of body assembly, as specified fn 4,4.2. This-test shall be conducted for 96 hours, Salt spray test not The test shallbe. performed 4.3.3.4 Push test of rotating band on body assembly (See Dwg. 9238908). Major De
49、fect, Code No. 06001.- Fifty (50) body assemblies shall be selected randomly from each lot and subjected to this test. representative of each band setting machine used. If any assembly fails to comply with the applicable Pequirement, the lot shall be rejected. Sampling selected shall be NOTE: Movement as specified on Dwg. 9238908 is defined as movement of The test shall be the back face of the rotating band relative to the body. performed as specified in 4.4.3 usi
