1、:!IL.-C-23331 (;:i:). 11 Ju!:c* 3 ?C2 SUPERSEDING 17 May 1943 NAVO es 27.15 MILITARY SPECIFIC ATION CORES FOR SEARCH COIL ASSEMBLIES This specification has been approved by the Bureau of Naval Weapons, Department of the Navy. 1. SCOPE 1.1 Scope. This specification estzblishes the requirements 1.2 Cl
2、assification. The msterial of the items shall be of for the procurement of cores and caps for use with Search Coil Assemblies. the following chemical compositions, as specified (see 6.2): Composition - Permalloy Composition - MuMetzi 2. APPLICABLE DOCUMENTS 2.1 The following specifications ar,d stan
3、ctards, of the issue in efect on date of invitation for bids, form a part of- this specification, to the extent specified herein. SPEC EIC ATIONS MILITARY MIL-P-116 hlHLITARY Preservation, hlethods of MIL-STB - 129 MIL -S TI) - I 6 3 Marking for Shipment and Storage. Preparation of Steel Products fo
4、r Domestic Shipment (Storqe) and Oversees Shipment $Chpies of specjficatims and standards required by contractors in cmiection with specific procurement fmctions should be cs shall be made without prior approval of the Bureau of Naval Weapons. 3.1 4 Requests for deviation. Requests for deviation fro
5、m this specification, applicable drawings, specifications, publica- tions, *materials, and processes specified herein, shall be referred in writing to the procuring agency. 3.1.5 Conflicting r2quirements. Conflicting require- mcnts arising between this specification or any Specifications, publica- t
6、ions, ,or drawings listed herein, shall be referred in writing to the procuring agency or appointed agent for interpretation and clarification. Cores covered by this specification shall meet the following performance requirements and product characteristics. 3.2.1 Material composition. Any compositi
7、on which mill meet the requirements of this specification may be used. (see Wrsgraph 6.2). 3.2 Performance requirements and product characteristics. . 3.2.2 Permeability. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-XIL-C-23331 (Wep) 3.2.2.1 Raw
8、 material. The trce perneability for raw . material covered by this specification shall be at least 10,000 when tested as specified in 4.4,3,1. 3.2.2.2 Finished cores. The spperent initial permeability of finished cores shall be at leir the proper handling of core material and of the finished cores
9、to insure tht the usefulness of the prouct has not bees impaired. 4. QUALITY ASSURANCE PROVISIONS 4.1 The supplier is responsible for the performance of all inspection requirements as specified herein. Except as other- wise specified, the supplier may utilize his own or any other inspection faciliti
10、es and services acceptable to the Government. inspection records of the examination and tests shall be kept complete and available to th2 Government as specified in the contract or order. The Government reserves the right to perform any of tlis inspctions set forth in the specification where such in
11、spections Ere deemed necessary to assure supplies and services conform to yresciihxl recy iremencs. .- I flIL-C-2333L 13 m ?mmob 030327q 0 m . - I=_ - . - ,. . _. . . *-. I-._ -.- .-. - . . - ._ - - . . - . I . - . . - -. . . - _ . . -. _ . -. -.-_. -_ . I . . . .- . -I_.*- . . -.-. ._I_ -. _ . . .
12、. - . - . . .-. . ._ . . - . _._.-_ I-. - . -. . I._ .- . - I . -._ . -.-.I.-. ._ - -. I . - . . 0 ._ I 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i/d RATIO OF LENGTH TO DlAMEfER FIGURE I t E , . -.- . Provided by IHSNot for ResaleNo reproduct
13、ion or networking permitted without license from IHS-,-,-4.1.1 Preproduction czmplc. Unless otherwise speciiicd for each contract or order, a represenktive csrnple of 10 cores sizll ba manufactured using the methcds and proceGures proposed for full pro- duction. The preproduction szrnple shall Es fo
14、rwarded to zn Zctivity designated in the contract or by the procizg zger,cy, for the purpose of determining compliance with the repiremefits 02 the contrxt, specifications and drawings. Further psc5zction 02 the item by the contractor prior to approval of the contra2hg octivity or th9 coapletioa of
15、the tests on preprcduction szmp1es sh21 t?$ zt thc contr performance of the - requir ed ecc2$23cu % . , -_.- . . ._. ,. -_ - .-.- . _. . . . . . - . L . .: t . ,.-.- . * - ._ L - - - . -. - -_ . . CI _ . ._ ” a.- . -.-. .-_ -_ ._.I_ _._._ . . . . Provided by IHSNot for ResaleNo reproduction or netwo
16、rking permitted without license from IHS-,-,-MIL-C-23331 13 9999906 0303282 O _- - MIL-C-23331 (Wep) 4.3.1. I as follows: 4.4 Equipment required for performing these tests is (a) Search Coil Test Solenoid (LD 295670) (Government will furnish) () Fluxmeter, Recording Mark 2 Mod 3 or 4 (Government wil
17、l furnish) (c) Transformer Mark17 Mod O or 1 (Gcvernment will furnish) (d) Fluxmeter Control Box - Navy Stock Number 21075-334L3602 (Government will furnish) (e) Fixed Resistors: One each (Rl) 10 ohms, 3%, 5 watt (Rz) 100 ohms, 3%, 5 watt . (f) Rheostats: One each (R3) 0-5 ohms, 3 turns., 3 watt . (
18、R4) 0-2000 ohms, 10 turns, 3 watt One ezch (Mi) capable of reading 450 *2 millamperes(m), caibrated at 450 ma. One ezch (F.2) having two ranges with the following capabilities: . (g) Mfllfmmeters: Low Range - 0-10 ma, accuracy * O. 05 ma, High O0 ma. calibrat5d at 30. O W. (h) Single Throw Switch -
19、One each (Sl) - must carry 5 amperes inductive current at 6 volts; contact resistance not greater than 0.01 ohm. (i) . Current Source - One 6-volt storage battery Tests 4.4.1 Test conditions. Unless othemise specified, tests shall be performed at 80 * 10 degrees(0) Fahrenheit (F) and ambiefit rektiv
20、e humidity. 4.4.2 Visual incpcction. The cores and caps shall be 2- ipact p Wd the drawings. to verify that the Materials, design, construction, physical dfmenion, and workmanship are in accordance with this document 6 - -. i -. -. OD- Provided by IHSNot for ResaleNo reproduction or networking permi
21、tted without license from IHS-,-,-I MIL-C-23331 13 7777906 0303283 2 W -1 1 MIL-C-23331 (Wep) 444.3 Permeability tests. 4,4.3.1 Fbw material test, To determine complhce with the requirements of 3.2.2.1, a sample cb the core rrrzterial shall be taken from each melt 2nd subjected to ctrbs*kntia.lly th
22、e same heat treatment as the mcxlerial for SC assemblies. The true permeability of this sample, measured zt a rnqpetizing force of H = 0, 002 oersteds, shall be st leEst 10,000. The typc! ef sample and the method of measwement shall be 8pproved by the Bureau of Naval Weapons. 4.4.3.2 Finished core p
23、ermezbilfty test. To determine compliance Bith the requirements of 3.2.2.2, e2ch core shdl be subjected to the following test (a) The search coil test solenoid, test item 4.3.1,l (a), shall be placed in wi east-west direction toelirninate the background field. This direction sWI be determined with 2
24、 compessmd shall not vzry over the length . of the solenoid. rJ . . . . . . . , t *. . . _ -._. . - . . .- . . - . .-. ._-_ . *.- . . . -. . . . . . -._ - . . - . L .l. . . ! . _. . - . I I _ . .- _ _._ .- . . _ - _._. . -_ . . . . . . . . . . . . ._ . - . -.-.-. . -_ . I- . _.- .- . ._. . ._ . _- -
25、.- . . . . .- . .-. , . . . .- . . . . . . . - . . . . . * -. . . . -._ t . . . .- . . . . _._._ 8.- _ . -._ _ .- _ -_. - . ._ , . _.-_ .- _-_ . i . * . _-_ . _. . - . - . I- - .-._-._. I . . . . . . . -. . ._ -_ _ . ._-._- I . ,. I . , k II , . . . . . Provided by IHSNot for ResaleNo reproduction o
26、r networking permitted without license from IHS-,-,-IL I MIL-C-23331 13 M 799990b 0303284 LI . . - 4 8 battery, negative * test item 4.3.1.1 (i). The terminal of the storage batterv s+;g;.; a - - b . . the current is to the ieft of the core has failed to meet the requirement 3.2.2.2. is to the right
27、 of, or coincides with, the steady position with the current off, the position with current off, the core is ?. acceptable. (The 95 percent factor has , .-.- If the position, with current on, . . , ,. . ,_ . . already been allowed aor in the current , uales specified in step (e) above.) 4.403.3 Caps
28、 psrmezbility test. To determine compliance with the requirements of 3.2.2.3, three randomly selected samples from each heat shall be tested as ring samples. Failure of the sample caps to meet requirement 3,Z.Z. 3 shall result in the rejection of that heat. A primary and a secondary coil shall be wo
29、und on the ring and the flux ?.inkage in the secondary measured for reversal of a given current in the primary. . . . . . . ._ H, the averee magnetizing force, shall be determined from: F where 10 I. N is the number or? turns on the primary coil, .P Ip is the primary current in ampzres (to be chosen
30、 so that H has thr vzire of O. 002), I -. _-_. .- . -.-_ .-.-. - . r:.7.-.T:.-.x:.T:, . . . .e-. I . . ,. . . . -.- .- - _. . -.-.- - _- , -_ .-. I . -.- - .-. . i -. . . .i.* . _.- ? I . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-C-23331
31、13 7997706 0303287 T d2 is the outside dicrmeter of the cap in centimeters. dl is the inside diameter of the cap Li ceiltirneters a (at the root of the thread). B, the average flux density, shal be determined from: B = L/2ANs where A 112 (d2 - dl)t, L is the lux linkage ckge in the secondary coil N,
32、 is the number of turas 02 the secondary coil, whfch ocCurs upon reversal of primsry current Ip, t is tho thickness of the czip in centimeters, 4.4.4 Straightness test. To determine compliance with the requirements of 3.2.3, each finicilecl core sh;ell pass freeiy though a tube of the same length as
33、 the core, with zn inside dismeter /16 inch greater than the outside dkmeter of the core. 4.5 Accep“Lance criteria. Failure of any core or cap to meet my of the requirements and tests of this speciliation sWi result in rejection of the core or cap. If tk number o failhg cores -.r caps exceeds the nu
34、mber permitted by tne associated criteria, the iot represented will be rejected. 4.6 Preservation, packing md pfzckaghg, Preservation, packing and packaging o the cores shall conform to section 5 of this specification. 5. PREPAMTION FOR DELIVERY 5.1 Preservation and packaging. 5.1.1 Level A. (Not ap
35、piicsrble) 5.1.2 Level B. 5.1.2.1 Cleaning and drying. (Not applicable, see 3.3) 5.1.2.2, Preservative applicztion. The selection of preaorm- tives shall be in accorhce with requirements of Military Bhdmd Fra-STD-163, as required. , ! . . . - . . . . . . . . . . . . . . -. . . - . . _.-.-_I._ . . -
36、- . - . *.- . . - _-. .- . - -.- -_.- . .- -.- .-._. . . - . .- . . - . . . . . . - . - . . . . . i. . . . . -.I- - . ._ . .-. - . I . ._. . L. . . . - - . . . . -. . . . .- -_ -._-_ .-I. . I . . . .- . ._-. :.:.:.:.-.-:.Y:.:.X: . “ . . . - . .- . . .-.- . . - . . - . .-I._. . -. .-.- ._ *.-.* . . ._._ . . -. - . .- . _ -.- ._ . . ._. .- - -. . . . . . -.I_ -. . . _I - . .- . - . _. r . i . . . - . . -. . . .-. . . . , I. L . r . . t:; Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
