1、5-37-27 NIL-F-70620A 13 W 7797906 0356179 3 M MIL-F-70620A (AR) 14 July 1987 SUPERSEDING MIL-F-70620 29 September 1986 MILITARY SPECIFICATION FUZE, MTSQ, M772 LOADING, ASSEMBLING AND PACKING This Specification is approved for use within the U.S. Army Armament Munitions and Chemical Command, and is a
2、vailable for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements and quality assurance provisions for the loading, assembling and packing of the M772 Mechanical Time Super Quick Fuze. 2, APPLICABLE DOCUMENTS 2.1 Government
3、documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specification
4、s and Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS MILITARY MIL-A-48078 - Ammunition, Standard Quality Assurance Provisions, General Spec if icat ion for STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes Beneficial co
5、mments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Armament Munitions and Chemical Command, Attn. AMSMC-QA, Picatinny Arsenal, New Jersey 07806-5000 by using the self-addressed Standardize-
6、 tion Document Improvement Proposal (DD Form 1426) appearing et the end of this document or by letter. - I -3 THIS DOCUMENT CONTAINS /y PAGES. - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-70b20A 13 7777706 0356200 b m MIL-F-7 O 6 2 OA (AR)
7、 MIL-STD-331 - Fuze and Fuze Components, Environmental and MIL-STD-414 - Sampling Procedures and Tables for Perf ormance Test for Inspection by Variables for Percent Be f ec t ive 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and pu
8、blications form a part of this Specification to the extent specified herein. .Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. DMWINGS US ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER ( ARDEC) PRODUCT DRAWINGS 12624567 - Fuze, MTSQ, M772 (
9、Copies of specifications, standards, drawings, and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Order of precedence. In the event of a conflict between the tex
10、t of this specification and the references cited herein, (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specifi
11、c exemption has been obtained. 3. REQUIREMENTS 3.1 Material. Materials and parts shall be in accordance with applicable drawings and specifications. 3.2 Fuze assembly. The M772 MTSQ fuze assemblies shall comply with all requirements specified on drawing (dwg.) 12624567 and with all requirements spec
12、ified in applicable specifications. with the requirements of MIL-STD-331, Test 119, Procedure 2, and of 3.7.1, 3.7.3 and 3.7.6. 3.3 Transportation vibration. The fuze assembly shall comply 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 MIL-F-706
13、20A 13 W 9797906 0356201 8 W MIL-F-7062 OA (AR) 3.4 Jolt and jumble. The fuze assembly shall comply with the 3.5 Drop test, 1.5 meter. The fuze assembly shall comply with requirements of MIL-STD-331, Test 101.2, Procedure 2 and Test 102.1. the requirements of MIL-STD-331, Test 111.1. 3.6 Waterproofn
14、ess. The fuze assembly shall comply with the MIL-STD-331Ar Test 108, except that the duration of immersion shall be five (5) minutes and pressure shall be three (3) psi gauge (6896 Pa) . 3.7 Ballistic perfocmance (provinq ground) . 3.7.1 Premature bursts. There shall be no premature bursts or metal
15、parts failure in the mortar or in the first 100 meters of flight . 3.7.2 Arminq safety. The fuze shall not function on impact against a 1“ (25.4mm) plywood screen positioned at a distance of 40 meters + 1 meter. - 3.7.3 Mechanical time functioninq (700F). The fuze, when set in the time mode, shall c
16、ause the projectile to function within the following upper (UL) and lower (LL) time limits. Set Time (Sec) 16.5 28.0 44.0 Function Time Limits (Sec) LL = 15.88 UL = 17.12 LL = 27.16 UL = 28.84 LL = 43.00 UL = 45.00 3.7.4 Extreme temperatures mechanical time functioning. The fuze, when set in the tim
17、e mode, and conditioned at -500F or t145OF, shall cause the projectile to function within the following time limits. Set Time (Sec) Function Time Limits (Sec) 28.0 LL = 27.00 UL = 29.00 3.7.5 Off time. The fuze when set in the time mode, at any temperature condition, shall function within the follow
18、ing off time limits: Set Time (Sec) Early Off Time (Sec) Late Off Time (Sec) 16.5 28.0 44.0 15.00 or less 26.25 or less 42.00 or less 18.00 or more 29.75 or more 46.00 or more 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-F-70620A 13 W 7777
19、70b 035620Z T MIL-F-7062OA (AR) 3.7.6 Fuze failures. When a fuze is set to function in the air and functions upon impact, it shall be considered a ground impact. When it fails to function on impact, it shall be considered a dud. 3.8 First article. When specified in the contract or purchase order, a
20、sample shall be subjected to first artice inspection in accordance with the technical provisions herein. (see 4.3 and 6.2) 3.9 Workmanship. All parts and assemblies shall be fabricated in a thorough, workmanlike manner. They shall be free of burrs, sharp edges, cracks, dirt, rust and other foreign m
21、atter. The cleaning methods shall not be injurious to any part, nor shall the parts be contaminated by the cleaning agent. Exterior surface coatings shall be uniform and continuous except for a few light scratches not exposing base material. All required markings shall be neat and sharply defined. 4
22、. QUALITY ASSURANCE PROVISIONS *4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the
23、contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed
24、necessary to assure supplies and services conform to prescribed. requirements. Unless otherwise specified herein or in the contract, the provisions of MIL-A-48078 shall apply and are hereby made a part of this detail spec if icat ion. 4.1.L Responsibility for compliance. All items must meet all requ
25、irements of section 3 and 5. The inspection set forth in this sp U II! Li *rl Er I H w s I3 c: 8 t h f Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-70620A 13 II 7797706 0356206 7 MIL-F-7062OA (AR) 4.4 guaiitv conformance inspection 4.4.1 Ins
26、pection lot formation. Inspection lots shall comply with the lot formation provisions of MIL-A-48078. In addition, each inspection lot of fuzes shall contain: a. Fuze components of one lot interfix number from one manufacturer b. Expelling charges of one lot interfix number from one manufacturer. ,
27、4.4.2 Examination. See MIL-A-48078. Unless otherwise specified in the Classification of Defects and Test Tables, sampling plans and procedures for major and minor defects shall be in accordancewith MIL-STD-105 (DIN 400801, Inspection Level II. Provided by IHSNot for ResaleNo reproduction or networki
28、ng permitted without license from IHS-,-,-z O H s w PI v1 z H NIL-F-70620A 13 m 997990b 0356207 9 m d 8 t I+ a -I v ji v . - c 2 Y trl E! Z! YI P rl . a c rn c m E z Li O 3 -4 U c FI CI a, O a, Cl O z 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
29、-25 t ri 3. h. d o u1 rn- Q 4 a, m LI a c u m c .rl d d a, pi. X w ni ni -Y -Y - . . * _I-_ -_- - MIL-F-70620A 13 = 9999906 0356208 O nininini QI MMMM M o. . .o 0 0000 O wo Om u !3 rncr a, u rnc E .A tn a .rl c M Lr o o pi w O a, u c a, 3 w .I4 LO Provided by IHSNot for ResaleNo reproduction or netw
30、orking permitted without license from IHS-,-,-a H E-i u w PI ul 2 H ai Er 2 O u rl 8 t d ri m c1 -F -F . . . - MIL-F-70620A 13 W 9999906 0356209 2 CJCJCJCJ CJ CJm MMMM m Mrn *e e 0. :I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-70620A 33 7
31、777706 0356230 7 h p: 4 4 U O cu W O I- l Eri I II !2 f u, Y t d r w n 8 Y W z O F O c 2 E l- - U c e#- 3 n m 03 m 8 . c 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a L. a a c 3 c 4 O cv u) O I Er I GI c I i d E y1 Y Y a 8 z O F % 5 3 H o 3 c
32、- b t I- is m e CJ w e w . - c X W W a O W .: E MIL-F-70620A 13 7779906 0356211 O W om0 ON m o O000 rldd drl d doo0 d dr(,riri U u a k O c c .Pl Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-8 t rl ST u cv w w . . . L _ MIL-F-70620A 33 m 7999906 03
33、56232 2 W rlrlrlrlrlrlrl drl mo a ho k curla fi a, un a Ql rl c O S 2 E M Co cn 3 C n O - E O LL n v Q o I c P LL O L. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-70620A 33 9977906 0356233 - MIL-F-7062OA (AR) 3. Inspection equipment. The in
34、spection equipment required to perform the examination and tests prescribed herein is described in the Paragraph Reference/Inspection Method column in the tables starting with 4.4.2.1. The contractor shall submit for approval inspection equipment designs in accordance with the terms of the contract.
35、 See Section 6 of MIL-A-48078 and 6.3 of this specification. 4.5 Methods of inspection 4.5.1 Transportation vibration. The test shall be performed on complete fuze assemblies (dwg. 12624567) set “S“. The test shall be conducted in accordance with the procedures outlined in , be fired as detailed in
36、4.5.5.2. If the fuzes do not comply with the requirements of 3.7.1 and 3.7.3, the first article or the lot + MIL-CTD-331, Test 119, Procedure 2. The sampled fuzes shall then 1 shall be rejected. 4.5.2 Jolt and jumble. The test shall be performed on complete fuze assemblies (dwg. 12624567) se- “S“. T
37、he test shall be conducted in accordance with the procedures outlined in MIL-STD-331, Test 101.2, Procedure II. Immediately after the completion of the jolt test, the fuzes shall be subjected to the jumble test in accordance with MIL-STD-331, Test 102.1. After the jumble test, the fuzes shall be dis
38、assembled to determine if the fuzes have been armed or become unsafe in any way. If so, the conditions shall be classed as defective. If one or more fuzes are classed defective, the lot shall be rejected. 4.5.3 Drop test, 1.5 meter. The complete fuze assemblies without the pull wire set s“ shall be
39、assembled to inert loaded projectiles as specified in the contract and subjected to the 1.5 meter drop test in accordance with MIL-STD-331, Test 111.1, . Procedure 1. After this test, the fuzes shall be disassembled to determine if the fuzes have been armed or become unsafe in any way. If so, the co
40、ndition shall be classed defective. If one or more fuzes are classed defective, the lot shall be rejected. 0 4.5.4 Waterproofness. The loaded fuze assemblies shall be subjected to the waterproofness test in accordance with MIL-STD-331, Test 108, except as provided in 3.6. After this test, the fuzes
41、shall be disassembled and examined under the ultra-violet light to determine compliance with 3.6, Any assembly that does not comply with the requirements specified in 3.6 shall be classed defective. 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
42、MIL-F-70 62OA (AR) 4.5.5 Performance test (proving ground ballistic) (see 6.4). 4.5.5.1 Arminq safety. The fuze shall be assembled to the inert filled 81mm cartridge set “s“ and fired at charge 1 from an 81mm mortar. They shall be fired against an one inch plywood screen set a distance of 40 meter +
43、 1 meter. If any fuze functions during the test, the lot shall be rejected. If any fuze does not function and the velocity is less than the requirement, the sample shall be classed a “no test“ and a new sample shall be selected and tested. 4.5.5.2 Mechanical time functioning. The sample fuzes shall
44、be assembled to 81mm, M819 cartridges, or M853A1 cartridges and fired from an M252 mortar between 450 and 850 elevation for air burst functioning. All fuze settings shall be photographed utilizing an instant, self processing camera. Three independent infrared sensing chronograph systems will be used
45、 to measure time of burst. The times shall be recorded from the chronograph counters to three decimal places. The three recorded time values for each round are averaged and the average is rounded to the nearest 0.01 second. When the first digit removed is 5, the last digit retained should increase b
46、y one unit if it is an odd number and it should not be changed if it is an even number. If one time value is lost or is determined to be invalid, (see 6.5) the remaining two values are used. The time values obtained by the chronograph systems shall be used to calculate the estimate of lot percent de
47、fectives. Where at least two chronograph systems provide a time value, the average shall be taken as the individual fuze value. The estimate of the lot percent defective shall be calculated using the methods prescribed in MIL-STD-414, Example B3. Any group which does not meet the time limits in 3.7.
48、3 and 3.7.4 by an estimated lot percent defective greater than the appropriate values given below shall cause the lot to be rejected. Sample Size (See 6.6) Maximum Allowable Percent Defect 26-30 20 17-19 8-10 5. PACKAGING 1.29 1.29 1.31 1.31 5.1 Packaging, packing and markinq. Packaging, packing and marking shall be in accordance with 42.700-0540.0a 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-70b20A 13 9999906 0356235 = MIL-F-70620A (AR) 6. NOTES 6.1 Intended use. The M772 MTSQ Fuze is intended for use on 81mm mor t
