1、. MIL-M-q538b 10 E 9Ob 0309863 b I Beneficial comments (recmendations, additions, deletions) and any pertinent data which my be of use in improving this document should be addressed to: ment Command, ATDI: addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of
2、 this document or by letter. Commander, U.S. Army Armament Research md Develop- DRDAR-TST-S, Dover, NJ 07801 by using the self- L MIL-M-45986(WC ) i5 February 1977 MILITARY SPECIFICATION MECHANISM, RECOIL, 155MM HOWITZER: M45 “his specification is approved for use by U.S. Army Armament Research and
3、Developent Command (Rock Island Arsenal), and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 .Scope. This specification covers one type of hydro-pneumatic recoil mechanism designed for use with the i55 millimetre (m) hawitzer, 198. 2. APPLICABLE DOCUM
4、ENTS 2.1 Issues of documents. The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a gart of this specification to the extent specified herein. SPECIFICATIONS Federal mjmT2 ccc-c-429 PPP- T-60 Military MIL-P- MIL-3-1.21 IL-P-o MIL-C -55 01 - Ta
5、pe, PackagingIMasking , Paper - Tape: Packaging, Waterproof - Cloth, Osnaburg, Cotton - Preservation-Packaging, Methods of - Barrier Material, Greaseproofed, - - Waterproofed, Flexible Paper, Wrapping, Laminated and Creped Caps and Plugs, Protective, Dust and Moisture Seal, General Specification for
6、 FSC 1025 I pr P I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-45986 (WC ) MIL-H-O MIL-H-6083 MIL-H-6088 MIL-1-6866 MIL-1-6868 MIL-H-6875 MIL- S-7742 MIL-R-11468 MIL-P-14232 MIL-E-16053 MIL-C-16555 MIL-B-26195 MIL-W-45205 MIL-1-45607 Ma;-
7、RA5774 MIL - Aircraft, Missile, and Ordnance Hydraulic Fluid, Petrolem: Base, for Preservation and Testing Heat Treatment of Aluminum Alloys Inspection, Penetrant Method of Inspection Process, Magnetic Particle Heat ?ikeatment of Steels (Aerospace ?Practice, Process for ) Screw Threads, Standard, Op
8、timum Selected Series: General Specifi- cation for Radiographic Inspections, Soundness Requirements for Arc and Gas Welds In Steel Parts, Equipment and Tools for Army Materiel, Packaging and Packing of Electrodes, Welding, Bare, Aluminum Alloys Coating Canpound, Strippable, Sprayable Boxes, Wood-Cle
9、ated, Skidded, Load- Bearing when exposed to the atmosphere for i5 minutes, the aeration bubbles shall disappear. 3.3.6.2 Contaminated oil. After function firing, a minimum of two ounces of oil shall be removed from the purge hole in the recuperator cylinder into a straight sided glass beaker. parti
10、cles allawable in the oil sample shall not exceed 400 microns in size. after function firing Metallic and non-metallic Insides of recoil cylinders shall shar no evidence of scoring 3.3.7 Housingand remlato? assembly. The torque required to rotate the housing and regulator assenbly, Drawing F12007872
11、, between the positive stops shall not exceed 20 foot-pounds after function firing. 3.4 Reliability, maintainability and durabilitx. Recoil mechanisms manufactured in accordance with this specification shall be free from any defects that ccmpranlse, limit or reduce the end item howitzer or compon- e
12、nt capability specified herein and shall be subject to examination and 8 I 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A - MIL-M-L!57b 30 7777906 0309873 5 = test by the Government to prove hatritzer capabilities and performance in accordance w
13、ith the folluwing: 3.4.1 Reliability. The reliability requirement is a specified value of 1100 mean rounds between failure and a minimum acceptable value of 700 mean rounds between failure as defined in AR 702.3. 3.4.2 Maintainability. The maintainability requirement is 0.5 hours for mean time to re
14、pair (“R) at organizational and 2.0 hours for direct support. lent Full Charge ( 3.4.3 Durabili . The durability requirement is 15,000 Equiva- rounds without rebuild or overhaul. 3.5 Identification and instructional marking. Identification and instructional markings shall be applied in accordance wi
15、th Draiqing 12007800. Other marking, including application of part numbers and instructional marking, shall be as specified on the applicable dratrings and in accordance with MIL-STD-130. Serial numbers shall be furnished by the procuring activity (see 6.1). 3.6 Workmanship, Workmanship and finish s
16、hall be in accordance with the highest grade practice used in manufacturing military weapons. Finished items and parts shall not exhibit poor mater5al and processing such as seams, laps, laminations, cracks, visible steps, sharp edges, nicks, scratches, buns, deformations and missing operations whic
17、h may affect servtceability, ilinctioning, operation, appearance, or safety. Fins and other extraneous metal shall be removed from cast or forged parts. welding) or other similar practices shall not be permitted without prior approval of the contracting officer. 4. QUALITY ASSURANCE PROVISIONS Hamme
18、ring to shape, salvage operations (including repair by 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specifled in the contract, the contractor ma
19、y use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. reserves the rig?& to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies
20、 and services conform to prescribed requirements. The Government 4.1.1 The contractor shall perform, as a minimun,inspections in accordance with the specifications, quality assurance provisions, MIL-Q-45970 and such documents as specified in L&12007800, and the contract. These minhum inspections sha
21、ll not be construed as relieving 9 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-45986(WC ) the contractor of his responsibilities under terms of the contract to furnish the Government with items complying with and conforming to the require
22、ments of the contract, drawings and specifications. 4.2 Quality assurance terms and definitions. Quality assurance terms and definitions used herein are in accordance with MIL-STD-109. 4.3 Classification of inspection. The inspection requirements specified herein are as follows: a. b o First article
23、 inspection (see 4.4). Quality conformance inspection ( see 4.5 ) . 4.4 First article inspection. The first article (initial produc- tion unit(s) shall be submitted for inspection in accordance with the contract (see 6.1). The first article shall be representative of the production processes to be u
24、sed during quantity production. The first article shall be subjected to the quality conformance inspection speci- fied herein and such other inspection as necessary to determine that all requirements of the contract have been complied with. first article items will be subjected to a reliability, mai
25、ntainability, and durability demonstration (see 4.71, performed by the Government for informational purposes, One of the 4.5 Quality conformance inspection. 4.5.1 Inspection lot. Unless otherwise specified herein, the formation, size, and presentation of inspection lots shall be in accord- ance with
26、 MIL-STD-105. Recoil mechanisms shall be assembled from lots of camponent parts that have complied with all inspection requirements specified herein. 4.5.2 Examination. 4.5.2.1 Recoil mechanisms. Visually and manually examine each recoil mechanism to determine conformance with the applicabi-e requir
27、e- ments, for proper cleaning, the presence of the specified protective coating, and todetermine the bly, and workmanship 7 see 3.6). Visually examine all markings to assure that they are correct and legible (see 3.5). Each step in the examination shall include a visual examination eneral quality, c
28、mpleteness of manufacture, assem- 4.5.2.2 Parts and assemblies. Parts and assemblies shall. be vis- ually andmanually examined to determine cmpliance with the materials, construction, and design requirements of 3.2 and the applicable require- ments of 3.2.1 through 3.2.6. and workmanship (see 3.6).
29、the requirements shall be rejected. Visually examine for marking (see 3.5) Parts and assemblies failing to comply with 10 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-V578b LO 777770b 0307873 7 m MIL-M-45986( WC ) 4.5.2.2.1 Heat treatmen
30、t. Examination and tests of heat treated camponents shall be in accordance with MIL-H-O or MIL-H-6875, as applicable, 4.5.2.2.2 Surface texture. When smface texture is specified on the drawing, examination with ANSI 346.1 and interpretation shall be in accordance 4.5.2.2 3 Welds and welding. &aminat
31、ion and tests of welded parts and welding procedures for aluminum alloys shall be in accordance with MIL-W-45205. steel parts shall be in accordance with MIL-STD-248 or as otherwise specified on the applicable drawings. Examination and tests of welding procedures for 4.5.2.2.4 Magnetic particle insp
32、ection. When magnetic particle inspection is specified on the drawing, the inspection shall be in accordance with MIL-I-6868. 4.5.2.2.5 Penetrant inspectLon. When penetrant inspection is specified on the drawing, the inspection shall be in accordame with MIL-1-6866. 4.5.2.2.6 Radiographic inspection
33、. When radiographic inspection is specified on the drawing, the inspection shall be in accordance with the specifications referenced on the drawing. 4,5.2.2,7 Protective finishes. Examination of painted surfaces and inorganic finishes shall be in accordance with the specifications specified on the a
34、pplicable drawings and MIL-STD-171, 4.5.2.2.8 Marking, Visually examine the identification plate for conpliance with the applicable drawing, for secure assembly, serial- ization and to assure that all pertinent data has been applied. 4.5.3 Testing. 4.5.3.1 Failure data. Unless otherwise specified he
35、rein, all tests shall be conducted on a ccmplete recoil mechanism. requirements cited herein are not canplied with, acceptance of the recoil. mechanism shall be deferred and the contractor shall accomplish, as applicable, the following actions: If test a. Conduct a failure analysis study performing
36、a dimensional, physical, and visual examination of the components which are suspected to be the cause of failure or malfnction. Evaluate and correct the applicable production processes and procedures to prevent recurrence of the same defect(s) in future production. b, 11 I Provided by IHSNot for Res
37、aleNo reproduction or networking permitted without license from IHS-,-,- - _ -. - . -. - - - . - _. . - - - . . - - - MIL-M-Ll59b LO 9999906 0309874 O - MIL-M-45986(WC ) c. Examine recoil mechanisms, artially assembled recoil mechanisms, and components 7 including components and subassemblies at in-
38、process or final assembly) to insure that material containing the same defect is purged from the inventory and not presented to the Government for acceptance. Submit the results of the failure analysis and the cor- rective actions taken to the Government for review and approval prior to submitting a
39、. reconditioned lot or reconditioned recoil mechanisms for retest. d, h.5.3.2 Performance characteristics testing. Each completely assembled recoil mechanism shall be tested for performance character- istics (see 3.3 and 3.3.1 thru 3.3.7) using the test methods specified in 4.6. shall be cause for r
40、ejection. Failure of the recoil mechanism to comply with the requirements 4.5.4 Inspection equipment. Unless otherwise specified herein, responsibility for acquisition, calibration, maintenance and disposition of acceptance inspection and test equipment prescribed on List of Incpec- Lion Equipment N
41、umbers EL2007800-I and for all other inspection equip- ment required by applicable specifications, shall be in accordance with MIL-1-45607. 4.5.5 Inspection of packaging. Unless otherwise specified (see 6.11, inspection to determine compliance with cleaning, preservation, packing and marking require
42、ments of the applicable packaging d-ocunenta- tion, for the level designated in the contract, shall be as specified in MIL-P-14232. 4.6 Test methods. Fach recoil mechanism shall be checked for nitrogen pressure, recoil oil, and other operating parameters specified on Draming F12007800 prior to subje
43、cting the recoil mechanism to the function firing test. 4.6.1 Function firing test. Each recoil mechanism shall be func- tion fired as specified in 3.3.2. If simulation equipment is used, all testing shall be done on a test stand at zero degrees with the variable recoil locked for long recoil or sho
44、rt recoil, as specified. Simulation equipment shall be capable of providing an impulse of 10,800 pound-seconds applied at 8 + 3 milliseconds. A typical recoil oil pressure-time trace is sham in FTgure 1. mechanism shall be subjected to the tests specified in 4.6.2 thru 4.6.7. Upon cmpletion of funct
45、ion firing, the recoil 4.6.2 Friction test. Pressure readings shall be taken and recorded on the replenisher, the recoil rod assembly and the recuperator floating piston assembly to determine that friction of these components does not exceed the maximum limits specified in 3.3.3. 12 I I Provided by
46、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-45 986 ( WC ) 4.6.2.1 Replenisher friction. The replenisher friction shall be measured by applying pressure through the oil filling valve and measuring the maximum pressure. 4.6.2.2 Recoil cylinder frction.
47、 The oil line between the recuperator and the replenisher shall be blocked and one of the recoil rods shall be released and extended 12 inches while leaving the other fully retracted. The recoil cylinder friction shall then be measured by applying pressure through the oil filling valve and measuring
48、 the maximum pressure necessary to fully retract the extended recoil rod. The other recoil cylinder shall then be tested using the same procedure. ator and replenisher shall be blocked and both recoil rods shall be fu1I.y retracted. applying pressure through the oil filling valve and measuring the m
49、axi- mum pressure necessary to pump a minhum of 95 ounces of oil into the system. measured. the two measured pressures. be applied to the nitrogen filling end of the recuperator cylinder, the breech end of the air cylinder and the connections for the cross-over tube between the recuperator and air cyllnders when the system is pres- surized. five minutes. 4.6.2.3 RecuDerator friction. The oil line between the recuper- The rec
