NAVY MIL-P-19277 B-1972 POSITIONER STEP (FOR TORPEDO MARK 37 MOD 2)《 MK 37 MODS 2和3鱼雷》.pdf

1、MIL-P-17277B 13 W 7777706 0300318 2 M mL-P-g277B4os) 3 Nove er 1 72 Superseding MIL-P-l9277A( Wep) 1 Deceniber 1964 MILI!hRY SPECIFICATION POSITIONER, SPEP (For Torpedo Mk 37 Mod 2) This specification has Been approved by the Naval Ordnance Systems Command, Department of the Navy 1. SCOPE 1.1 This s

2、peeification describes the requirements for the procurement of f3. step positioner, NAVORD Dwg 1521127. of a steering controller, serves to introduce electrical commnd signals, received from a source ext;ernal to the steering controller, into a horizon- tal (aelmuth) steering system of a torpedo in

3、accurate increments of two degrees. The step positioner, as an element 2. ApPLICABrn DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposals form a part of this specification to the extent specified herein. SEECZJXCATIONS Federal O-S-642 S

4、odium Phosphate, Tribasic, Technical m-836 Nut, Hexagon and Square m- S-86 Screw, Cap, Socket-Head QQ-C-320 Chromium Plating (Electrodeposited) QQ-N-290 QQ-Sy365 Nickel Plating (Electrodeposited) Silver Plating (Electrodeposited) QQ-S-571 Solder, Soft (Tin, Tin-Lead, and Lead-Silver ) FSC 1355 THIS

5、DOCUMENT CONTAINSf Paint, Volatile Mineral Spirits Boxes, Wood, Nailed and Lock Corner Preservation, Methods of Bolts, Nuts, Studs, and Tap Rivets (an materials) Shockproof Equipment, Class (High impact ) Magnesium Alloy, Processes for Cor- rosion Protection of Chemical Filas for Aluminum and Alumin

6、um Alloys Soldering Process, General Specifi- cation for Brazing of Steel, Copper, Copper Alloys and Nickel Alloys Anodic Coatings, for Aluminum and Aluninum Alloys Primer Coating; Zinc-Chromate, Low Moisture Sensitivity Enamel, Equipment, Light -Gray (Formula No. 111 for Metals) Coating, Pretreatme

7、nt (Formula No. i17 for Metals) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17277E 13 9 777770b 0300320 O MIL-T-18404 mL-82 590 spANI;wIDs Military MTL-EXCD- MIL - SrD-147 DRAIZlNGS Naval Ordnance Systems Command Drawing 1521x7 Drawing 2190

8、629 PUBLICAnONS Naval Ordnance Systems Command OD 3000 os 6341 Torpedoes, Environmental Require- ments; General Specification for Environmental Requirements and Tests (For Torpedo Mk 37 Components and Asseniblies) Marking for Shipment and Storage Palletized and Containerized Unit Loads, 40“ x 48“ Pa

9、llets, Skids, Runners, or Pa,llet-Pype Base Step Positioner Steering Controller Assembly Lubrication of Ordnance Material Ordnance Design Requirements; General- Miscellaneous (Copies of specifications, standamis, drawings, and publications required by the contractor in connection with specific procu

10、rement functions should be obtained *om the procuring activity or as directed by the contracting officer . ) 2,2 Other pblicatons. The following documents form a part o9 this specification to the extent specified herein. the issue in effect on date of invitation for bids or request for proposals sha

11、ll apply, Unless otherwise indicated, Natiional Bureau of Standards Publications Handbook 28 Screw-Thread Standads for Federal Services 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PX7277B 33 7797706 0300323 2 M - - - MIL-P-l927D( OS) (Appli

12、cation for copies should be addressed to the Superintendent of Doc- uments, Government Printing Office, Washington 25, D. C. 20402,) 3.1 Description. The step positioner, NAVORD Dwg 1521127, is an element of the steering controller in a horizontal steering system under gyro con- trol. It angularly p

13、ositions a shaft through 360 degrees of rotation in either direction in accurate increments of 2 degrees. The step positioner is so mounted on a bracket that its shaft is in alignment with and mech- anically coupled to the shaft of a synchro-transformer, as shown on NAVORD Dwg 2190629. The step posi

14、tioner is activated by electrical command sig- nals, the direction of anguiar displacement being dependent upon the ter- minal pair energized (A and B or B and C), 3.2 General requirements 3.2.1 Freproduction sample. Unless otherwise specified in the contract or order, preproduction samples of the s

15、tep positioner shall be manufac- tured using the methods and procedures proposed for the production lot. These units shall be tested as specified in Section 4 herein and are for the purpose of determining, prior to starting production, that the contractors production methods are capable of producing

16、 step positioners that comply with the technical requirements of the contract, See 4.3.1. 3,2.2 Conflicting requirements. In the event of conflict between the documents referenced herein and the contents of this specification, the contents of this specification shall apply. 3.2.3 Definitions. Defini

17、tions applicable to the environmental require- ments of xhis specification are contained in MIL-T-18404, 3.2.4 Materials. Unless otherwise specified in the contract, requisi- tion, or order, all materials and purchased parts entering into the final assenibly of the step positioner shall conform stri

18、ctly to the applicable Federal or Military specifications. specification or which are not specifically designated herein shall be of the best quality, of the lightest practicable weight consistent with strength and durability, and entirely suited to the purpose for which in- tended under all conditi

19、ons of test and service operation. tions concerning the use of a superior substitute for any part or material specified herein shall be accompanied by a description of the proposed substitute, the reasons therefore, together with evidence to substantiate any claim as to its suitability. At the discr

20、etion of the Naval Orc?iance Systems Command, test samples may be required to prove the suitability of the proposed substitute. Materials which are not covered by Recomenda- 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17277B 13 7777706 03

21、00322 I 1L-P-192773( os) 3*2.4.1 Critical materials. Materials shall be selected on the basis of suitability and availability, taking into consideration the additiona restrictions created during a t-ime of national emergency, ials shall be used ony when essential for satisfactory operation of the Na

22、val Ordnance Systems Command. Critical mater- 3.2.4.2 Magnesium. The use of magnesium requires the specific approval of the Naval Ordnance Systems Command or its appointed agency 3.2.4.3 Flamable materials. Materials which will support coinbustion or which are capable of causing an-explosion shal no

23、t be wed. 3.2.4.4 Toxic materials. Materials which may produce harmful toxic effects under conditions encountered in the Naval Service shall not be used. 3.2.5 Moisture, fungus, and corrosion. The step positioner shall be moisture, fungus, and corrosion resistant in accordance with OS 6341, 3.2.6 Fi

24、nishes and coatings 3.2.6.i General. All machining operations shall be completed before the application of the corrosion-resistant treatment. 3.2.6.2 Plating. Electrodeposited metallic coatings shall conform to the following. ensure conformance with the parts or equipment specification for conduct-

25、ivity and corrosion resistance. The plating thickness shall in all cases be adequate to Zinc Nickel chromium Silver QQ-Z-325, !Py-pe II, Class 2 or 3 QQ-N-O QQ-C-320, me X QQ- S- 36 5 NOTE Cadmium plating shall not be used. 3.2.6.3 Tin and lead-tin alloys. Platings of tin and lead-tin alloys, when u

26、sed, shall be of aaequate thickness and so continuous as to with- stand exposure to simulated sea atmosphere as specified in MIL-T-18404. 3.2.6.4 Corrosion resistant steel 3.2.6.4.1 Cleaning. Remove al1 oil, grease, dirt, and other foreign matter by vapor degreasing, washing with Petroleum Spirits,

27、Tp-T-29l, Grade 1, or by immersion in a boiling solution of Trisodium Phosphate, 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-P-19277B 13 m 7797706 0300323 b _ - MIL-P-l9277B( OS) 0-8-642, followed by rinsing in cold water and a final rins

28、e in hot water. If necessary because of scale, -immerse in the foZlow9n.g solution, held at 60 degrees centigrade (C) (140 degrees Fahrenheit (F), until scale is .removed : Nitric acid 2076 by volume Hydrofluoric acid Water 1 to 3$ by volume 77 to 78 by volume Then rinse in cold water and blow dry i

29、ith compressed air. are fabricated with overlapping joints the preferred method of cleaning is by vapor degreasing to avoid entrapment of caustic or acid solutions. If structures 3.2.6.4.2 Passivation. Immerse the clean metal in a solution of equa Rinse first in clean cold parts of nitric acid (40 d

30、egrees Bawne) and water held at a temperature of 71 degrees C (160 degrees F) for five minutes. water followed by a rinse in hot water. Then blow dry with compressed air. 3.2.6.5 Anodic film. Parts fabricated from aluminum or aluminum alloys shall be anodized in accordance with MIL-S-8625 or MIL-C-5

31、541. 3.2.6.6 Magnesium an magnesium aoys. Magnesium and magnesiun alloys, when authorized, shall be finished in accordance with MIL-M-3171. 3.2.6.7 Painting. If painting is selected as the final finish, the fol- lowing processes shall be used: 3.2.6.7.i Cleaning. Surfaces to be painted shall be free

32、d of dirt, dust, grease, mill scale, welding flux, and other foreign matter. Cleaning may be accoqlished with volatile grease solvent, vapor degreasing detergents, hot alkali cleaning solutions, or other processes which have no deleterious effect on the surfaces. Welding irregularities shall be remo

33、ved. Alkali cleaning shall not be used on aluminum or aluminum alloy surfaces. alkali cleaning is used, the final rinse shall consist of a dilute chromic acid solution (0.5 pound of chromic acid per LOO galions of water). fabrication involves overlapping joints, vapor degreasing is the preferred met

34、hod of cleaning, When When 3.2,6.7.2 Pretreatment. Either of the following processes may be used: (a) One coat of wash pretreatment in accordance with MIL-P-I, applied as a continuous film 0.0004 to 0.0005 inch thick, or (b) A hot-dip tark phosphate or chomate-phosphate treatment conform- ing to zT-

35、C-490, Grade 1. 3.2.6.7.3 Primer. One coat of primer in accordance with FT-P-664 or MIL-P-8585 (for awuinwu or magnesium surfaces), applied as a continuous film 0.0004 to 0.001 inch thick. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.6.7.4 E

36、namel. Two coats of enamel, light gray, ML-E-l509, Class 2, appl%ea as a continuous film approximtely 0.001 inch thick. 3.2.6.7.5 Exceptions. The following surfaces shall not be painted: mounting surfaces and shaft extensions. 3.2.7 Masking. Marking shall be im accordance with NAVORJI Dwg 1521127. M

37、azkilig shaal. be by maas of engraving, metal stamping, embossing, or by permanently affixed nameplate. 3,2.7.1 Marking data. Unless othemdse specified in the contract or order, or detailed in the applicable ,rai serial number; NAVORE) operating volt- age rand current,; m.anufacturers name, ayrobol,

38、 or trademark; manufacturers part or assembly rimer (if desired). NOTE The date and place of manufacture shall not be shown. (b) In area A, NAVORD Dwg 1521127: terminal designations. (c) Index marks as shown on NAVORD Dwg 1521127. 3.2.7.2 Serial nuibers. Serial numbers of each major mit or part shal

39、l- start vth nuniber one and continue consecutively for the total quantity to be supplied regardless of the nuniber of contracts or orders involved. Con- fimwtion of the use of serial ners mder any contract or order shall be obLa5ned -From %he Naval Ordnance Systems Command or its appointed agency.

40、lihee %he same major mit or part may have been previously manufactured by another con%ractor, informtion concerning serial numbers shall be obtained fromthe Naval Ordnance Systems Comand or its appointed agency. 3.2.8 Threaded partse Bolts, nuts, screws, studs, etc., shall conform to the requirement

41、s of FF-N-836, FF-X-86, or mL-B-857. for BXL threadea parts shall be in accordance w2th Screw-Thread Standards for Federal Services, Eandbook H28, and shall be of size 2-56, 4-40, 6-32, 8-32, 10-32, 1/4-20, or 1/4-28. If larger sizes are needed, they shall be of the coqse-thread series. studs, nuts,

42、 etc.) requiring treads of special diameter and pitch shall employ the special pitch of 16 threads to the inch. where a finer pitch is necessary, one of the following shall be selected: screw threads Threaded pazts (other than bolts, screws, For applications 20, 28, 36, 44, OX 56. 7 Provided by IHSN

43、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.8.1 “head projection. Screws or bolts secured by nuts or other re- taining devices shall be of such length that a minimum of 1-1/2 threads and a maximum of 1/8 inch plus 1-1/2 threads for screws up to one inch in l

44、ength, and 1/4 inch plus 1/1-2 threads for screws over one inch in length, shall project beyond the retainer. to preclude the use of screws assenibled in blind holes, spacers, etc., or where design restrictions require that the threaded portion of the screw be flush with the retaining device. bent,

45、or otherwise shortened after plating. 3.2,8.2 Thread engagement. These requirements shall not be construed In no case shall the screw be clipped, Screws and bolts in tapped parts other than in nuts shall enter and engage for a distance at least equal to the diameter of the screw or bolt. 3.2.8.3 Sel

46、f -tapping screws. Self-tapping screws will not be acceptable except where employed in approved components and where their removal from the component is a remote possibility. 3.2.8.4 Locking devices. Locking devices shall be provided for all screw thread asseniblies except for captive screws on with

47、drawable units. working loose during tests or in service of threaded pwts will be consider- ed a defect in design. Military Standards and shall be fabricated of corrosion Tesistant steel, plated phosphorbronze, or steel zinc-plated, in accordance with QQ-2-32?, Typ II, Class 2 or 3. /4 inch or great

48、er in diameter. The Ail lockwashers shall conform to the applicable 3.2.8.4.1 External tooth type lockwashers shall not be used with screws Spring type lockwashers may be used f6r screws of all sizes. 3.2,8.4.2 3.2.9 Lubrication. Provision shall be made to adequately lubricate all bearings and weari

49、ng “surfaces, with due consideration to the operation of the step positioner in tropical and arctic climates. The design shall be such that satisfactory operation will result, with a minimum of re-lubrica- tion, and that a minimum of grades and types of lubricants are required. OD 3000 shall be used when selecting lubricants and related materials. Previous to production of the step positioner the