1、DETAIL SPECIFICATIONCANNON: GENERAL SPECIFICATION FORThis specification is approved for use by all Departments and Agenciesof the Department of Defense1. SCOPE1.1 Scope . This specification supports the acquisition of: gun and howitzer cannon; mortar cannon,mounts, and baseplates; recoilless rifles
2、and mounts; and related equipment. This specification includes theminimum essential Engineering and Packaging Requirements and the necessary Verifications to determinethat these requirements have been met.2. APPLICABLE DOCUMENTS2.1 General . The documents listed in this section are specified in sect
3、ions 3 and 4 of thisspecification. This section does not include documents cited in other sections of this specification orAMSC N/A FSC 10GPDISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited .Beneficial comments (recommendations, additions , deletions) and any pertinent
4、 data which may be of use inimproving this document should be addressed to: Commander, US Army TACOM ARDEC CCAC, ATTN:AMSTA-AR-CCB-EC, Watervliet, N.Y. 12189-4050 by using the self-addressed Standardization DocumentImprovement Proposal (DD-Form 1426) appearing at the end of this document or by lette
5、r.MIL-DTL-13931J16 August 1999SUPERSEDINGMIL-C-13931H11 February 1991INCH-POUNDProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13931J2recommended for additional information or as examples. While every effort has been made to ensure thecomplet
6、eness of this list, document users are cautioned that they must meet all specified requirementsdocuments cited in sections 3 and 4 of this specification, whether or not they are listed.2.2 Government documents .2.2.1 Specifications, standards and handbooks . The following specifications, standards,
7、andhandbooks form a part of this specification to the extent specified herein. Unless otherwise specified, theissues of these documents are those listed in the issue of the Department of Defense Index ofSpecifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2)
8、.SPECIFICATIONSFEDERALA-A-50767 - Analyzer, Surface FinishDEPARTMENT OF DEFENSEMIL-PRF-3150 - Lubricating Oil, Preservative, MediumMIL-A-8625 - Anodic Coatings for Aluminum and Aluminum AlloysMIL-L-14107 - Lubricating Oil, We apons, Low TemperatureMIL-F-18264 - Finishes: Organic, Weapons System, App
9、lication and Control ofMIL-PRF-81322 - Grease, Aircraft, General Purpose, Wide Temperature RangeSTANDARDSFEDERALFED-STD-H28 - Screw Thread Standards For Federal ServicesDEPARTMENT OF DEFENSEMIL-STD-129 - Marking for Shipment and StorageMIL-STD-130 - Identification Marking of US Military PropertyProv
10、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13931J3MIL-STD-2073-1 - Standard Practice For Military PackagingHANDBOOKSFEDERALCataloging - Commercial and Government Entity (CAGE) PublicationHandbook H4/H8 (United States and Canada) Name to Code
11、Section ACataloging - NATO Commercial and Government Entity CodeHandbook H4/H8 (Excluding United States and Canada) Name to CodeSections C 3/16 inch and smaller in diameter may be driven cold. Nonferrous rivets shall be driven cold.3.4.4.3 Staking . Staking (see 6.3.5) shall comply with the drawings
12、.3.4.5 Protective finishes .3.4.5.1 Anodic coating . Anodic coatings shall comply with MIL-A-8625 or the applicable specificationshown on the drawing.3.4.5.2 Chromium plating . When chromium plating is specified, the following shall apply:3.4.5.2.1 Plating process . Prior to production plating, the
13、contractor shall submit the details of theplating process to be used to the Procuring Contracting Officer for approval by the responsibleGovernment design activity. The procedures shall include information on:Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
14、HS-,-,-MIL-DTL-13931J9a. The cleaning before plating, including the degreasing method, the materials, and the rinse afterblasting.b. The anode placement procedure.c. The reverse etch cycle, including the current and temperature control, the time of the cycle, andthe chemical solution.d. The plating
15、cycle, including the current and temperature control, the chemical solution, and theafter-plate rinse.e. The plating solution control including the filtering and chemical analysis schedule.It should be noted that approval of the plating process implies no guarantee of acceptance of the resultsobtain
16、ed in use.3.4.5.2.2 Surface conditions before plating . The machined surfaces shall conform to the applicabledrawings and specifications. If residual magnetism is present (from magnetic-particle inspection or othercauses), the part shall be demagnetized before plating. An aluminum oxide cloth of 150
17、 or finer grit maybe used for final surface treatment, provided it is followed by an adequate cleaning procedure such as bywater rinsing and swabbing with a hot alkali cleaner.3.4.5.2.3 Plating application . The surfaces to be plated shall be mechanically and chemically clean. Thechromium shall be d
18、eposited directly on the base metal and shall be free of frosty (orange peel) areas.Surfaces shall be plated to the specified dimensions and surface texture shown on the drawings.3.4.5.2.4 Thermal treatment after plating . The thermal treatment after plating shall be in accordancewith the applicable
19、 component drawing.3.4.5.2.5 Polishing of chromium plated parts . After plating, parts shall be mechanically honed, ground ,lapped or polished, if necessary, to obtain the dimensional requirements and the finish (surface texture)specified on the applicable drawing, and to remove any surface irregula
20、rities.3.4.5.2.6 Visible plating defects . The chromium deposit shall be smooth and free from visible defectssuch as unplated areas, blisters, flaking, peeling, frost, nodules, and pits. The following exceptions applyto cannon tubes only.a. Nodules are acceptable on the rifling surfaces (lands and g
21、rooves) providing the size and densitydo not exceed that shown in photographs designated by the design agency (see 6.2).b. Pits that result from nodule removal are acceptable.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13931J10c. The gas
22、check seat surface shall not contain pits.d. Pits are acceptable elsewhere on the chamber surfaces providing the size and density do notexceed the criteria and thresholds designated by the design agency (see 6.2).Any condition exceeding these criteria shall be reported as nonconforming material.3.4.
23、5.2.7 Visible plating defects after proof-firing . Unless otherwise specified by the specific cannonspecification, the following applies: After proof-firing, there shall be no defects in the gas check seatzone. The remainder of the plated surface in a tube shall be free from any visible spalling dep
24、ressions(see 6.3.2) in excess of 4 inches cumulative length, and chipped areas (see 6.3.3) in excess of 16 inchescumulative length.3.4.5.2.7.1 Dimensional limits of spalling depressions . The overall length of a spalling depression in atube, measured parallel to the bore axis, shall not exceed two i
25、nches. The overall width of a spallingdepression, measured at right angles to the length, shall not exceed the criteria and thresholds designatedby the design agency (see 6.2).3.4.5.2.7.2 Dimensional limits of chipped areas . The length of a chipped area in a tube, measuredparallel to the bore axis
26、, shall not exceed four inches. The width, measured at right angles to the length,shall not exceed the criteria and thresholds designated by the design agency (see 6.2). The length or widthis the distance between the outer edges of the outermost cavities.3.4.5.3 Coating materials . Coating materials
27、 shall comply with the applicable engineering drawings, theapplicable specifications, and the following:3.4.5.3.1 Mixing . Coating materials shall be prepared for application under clean conditions with cleanequipment. Materials shall be allowed to warm to room temperature before mixing. Skins, if p
28、resent,shall be carefully removed from the material. The materials shall be thoroughly stirred or shaken prior tothinning and application. To avoid problems of incompatibility in the liquid and drying phases, mixing ofpaints of the same specification but supplied by different manufacturers is prohib
29、ited. Every effort shallbe made to assure that a primer of a single manufacturer is used on the item to be finished and similarlythe top coat should be restricted to a product of a single manufacturer.3.4.5.3.2 Selection of thinners . The thinner recommended on the package label or in the applicable
30、process specifications shall be employed. Other thinners as recommended by the paint manufacturer forhis particular product may be used.3 .4.5.3.3 Aged materials . Wash primers that are more than one year old from the date of manufacture,primer paint that is more than two years old from the date of
31、manufacture, and top coat paint that is pastthe shelf life expiration date shall not be released for production use on exterior surfaces of cannon untilthey have been subjected to all the inspection tests of the applicable material procurement specification,including both the large scale panel spray
32、 tests and the scratch wet tape adhesion test specified in MIL-F-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13931J1118264. If the tests indicate the material to be satisfactory for use, it shall be consumed within six monthsfrom date of
33、completion of tests; otherwise the unused material shall be re-tested similarly.3.4.6 Assembly .3.4.6.1 Preparation for assembly . All parts shall be free of metal chips, dirt and other foreign material,and shall be properly lubricated at the time of assembly.3.4.6.2 Fitting . All parts shall assemb
34、le readily; however, some force may be necessary due to “FREESTATE VARIATION“ permitted on drawings. Parts to be fastened together by rivets, bolts, welding orsimilar means, shall fit each other properly before assembly and shall not be drawn or drifted to a fit bybolts, rivets or other means of str
35、ain. With the exception of surfaces where uniform contact or bearing isspecified, parts shall not be filed, scraped or otherwise altered to obtain proper fitting. If metal removingoperations are required during assembly, all parts contaminated with metal chips or foreign matter shallbe cleaned, refi
36、nished (if necessary), re-lubricated and reassembled.3.4.6.3 Reduction of chamber and tube diameters . When hoops are specified for cannon tube assembly,reduction of the chamber and bore across diameters due to heat shrinkage of the hoop shall be limited to.002 inch. This reduction shall apply for t
37、he length of each hoop plus any transition zones.3.4.6.4 Functioning . Assembled items shall function smoothly without interference. Any defects inoperation due to defective parts or incorrect assembly shall be corrected by the supplier.3.4.6.4.1 Obturator surfaces . The surfaces of obturator pads a
38、nd the metal surfaces against which thepad seats shall be free from oil and grease. When metallic-ring breech seals are prescribed, the sealingsurfaces and mating seats shall be free from any foreign matter.3.4.6.4.2 Bearing of obturator parts . When the breech is closed each outer split ring shall
39、have 360degrees of contact with the seating surface in the tube, with not less than 80 percent of the seating area ofeach ring in contact with the tube. Metallic-ring breech seals shall have 360 degrees of contact with themating seating surfaces.3.4.6.5 Lubrication.3.4.6.5.1 Mating surfaces . All co
40、ntact surfaces of metal parts, except surfaces on which freedom fromlubricant is specified and bearing surfaces for hot rivets or fused joints, shall be coated immediatelybefore assembly with a film of preservative lubricating oil conforming to MIL-PRF-3150.3.4.6.5.2 Threaded joints . Threaded joint
41、s larger than one inch diameter shall be coated to fill the threadclearance with grease conforming to MIL-PRF-81322. This requirement shall apply to the matingthreads of the following:a. Breech ring and breech bushing.Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
42、se from IHS-,-,-MIL-DTL-13931J12b. Tube and breech ring or correspo nding part.c. Tube and supporting rings or muzzle attachments.d. Intermediate or locking parts included in a., b. or c.3.4.6.5.3 Breechblock counterbalances . Before being assembled, all parts of counterbalances shall becleaned of a
43、ll metal chips and foreign matter and coated with grease conforming to MIL-PRF-81322.3.4.6.5.4 Automatic cannon . Unless otherwise specified, automatic cannon shall be lubricated with oilconforming to MIL-L-14107.3.4.6.5.5 Solid-Film lubricants . Unless otherwise specified, cannon parts coated in co
44、nformance toB8769470 shall not be coated with other lubricants.3.4.7 Marking . Parts and assemblies shall be clearly and legibly identified in accordance with therequirements of the applicable detail drawings, MIL-STD-130, and this specification.3.4.7.1 Size of marking . The size of characters shall
45、 be a minimum of 1/8 inch high. Where areaavailable is too small, then the largest characters consistent with the area shall be used.3.4.7.2 Type of marking . Letters shall be sans-serifs such as “Gothic” or “Futura“ capitals, and thenumerals shall be Arabic.3.4.7.3 Methods of application . Marking
46、shall be directly applied to the surface of the item by metalstamp, embossing, engraving, forging, casting, molding, electrochemical etch, electric arc pencil, or lasermarking. When these methods are not possible, because of potential damage to the item or nonlegibilityof the marking, the marking sh
47、all be directly applied on the item by environmentally protecteddecalcomania transfer, metal or plastic wrap around tag, stencil, silk screen, identification plate, tag, orindelible ink stamp. When the item cannot be marked on its surface or tagged, the item shall be placed ina unit container (bag,
48、etc.) with the identification marking located on the unit container in addition to, orin combination with the marking information specified in MIL-STD-129.3.4.7.3.1 Caution . Identification marking of items shall not affect the life and utility of the item.Marking materials creating hazardous condit
49、ions shall not be used.3.4.7.4 Location, legibility and permanency . Location shall be as specified on the drawing or in thecontract. Legibility shall be such as to be readily readable. Identification marking on identification platesshall be of a contrasting color to the plate surface. Marking shall be of a permanency to preventobliteration or obscuring
