1、 MIL-S-82684 (OS) 6 April 1979 MILITARY SPECIFICATION SPRING, HELICAI, TORSION O This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is avail- able for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specific
2、ation covers one type of helical torsion spring. 2. APPLICABLE lxmMENrs 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 - part of this specification to the extent specified herein. SPECIFICATION FEDERAL QQ-P- 416
3、 Plating, Cadmium (Electrodeposited) PPP-H-1581 Hardware (Fasteners and Related Items), Packaging of STANDARDS MILITARY MIL-STD- 29 MIL-STD-105 MIL-STD-129 Springs, Mechanical, Drawing Requirements For Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Benef
4、icial comments (recommendations , additions, deletions) , and any pertinent data which may be of use in improving this document, should be addressed to: Standardization/Documentation Division (501) , Indian Head, MD 20640, by using the self-addressed Standardization Document Improvement Proposal (DD
5、 Form 1426) appearing at the end of this document, or Commanding Officer, Naval Ordnance Station, /by letter. I &$=g -, FSC .&Q. l THIS DOCUMENT CONTAINS 7 PAGES. - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- ML-S-82b84 5b 0b 0222908 5 MIL-S-826
6、84 (OS) PUBLICAT I QNS IV 43A Preparation of Quality Assurance Provisions e DRAWING NAvAz, SEA SYSTEMS CCPW (CODE IDENT 10001) 2841637 Spring, Helical Torsion (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions sh
7、ould be obtained from the procuring activity or as directed by the contracting officer) 3. REQu1-s 3.1 First article. When specified in the contract (see 6,2), the contractor shall furnish sample springs for first article inspection and approval (see 4.51. 3.2 Design. torsion spring. The design shal
8、l be in accordance with Dwg. 2841637. The spring shall be a left hand helix open coil helical NOIE: The 435 REF Number of coils-free position and the 180 REF tang angle specified on Dwg. 2841637 are not design parameters. The number of turns and the resulting tang angle are calculated using spring f
9、ormulae and the torque requirements specified. rin formulae, For design information and formulae, the contractor 3.3 =-+7T s all re er to MIL-STD-29. 3.4 Material. on Bwg, 2841637. The spring shall be formed from steel wire as specified NOIE: The forming operation shall allow for relaxation of the s
10、prings during the stress relief operation, 3.5 Stresa relief. The spring shall be stress relieved at 260 to 290OC (C to 55OF) for 30 minutes minimum, after forming, but prior to plating. 3.6 Protective coating. The spring shall be cadmium plated in accordance with Type II, Class 2 of QQ-P-416. 2 Pro
11、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-82684 56 9999906 0222909 7 MIL-S- 82684(0S) 3.7 Hydrogen embrittlement relief (MiO1). The cadmium plated spring shall be baked after plating at 175 to 205C (350- to 400F) for a minimm of 24 hours for
12、 hydrogen embrittlement relief. Baking shall be initiated within 8 hours of plating. The spring must not be flexed prlor to baking. 3.8 Mechanical requirements (M102). The spring shall operate over a ,750 to .753 inch diameter shaft and develoD a toraue of 8.5 to 1cI.O in. lb when one tang is held s
13、tationary and the other is iotated to the point Fepresenthp the initial position on Dwg. 2841637 when tested in accordance vlth 4.7 The spring shall be uniform in quality and shall be free from cracks, irregularities, scale, surface imperfections, burrs or slivers which could adversely affect safety
14、 or performance. Sharp edges shall be rounded equivalent to .O15 R maximum. 3.9 Workmanship. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as spe&fied her
15、ein. specified in the contract, the 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
16、 where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. Fxkept as otherwise 4.2 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be performed under the following conditions: a. Temperature: Room ambient 1
17、8 to 35C (65 to 95F) b. Humidity: Room ambient to 95 percent relative, maximum 4.3 Classification of inspection. The inspection requirements specified herein are classified as follows: a. b. First article inspection (see 4.5) Quality conformance inspection (see 4.6) 4.4 Sampling. 4.4.lFirst article
18、sample. When specified in the contract (see 6.2), a first article sample of ten springs, manufactured in accordance with 3.2, shall be subjected to the first article inspection detailed in 4.5 at an activity designated by the procuring activity (see 6.2). of the first article sample shall be based o
19、n no defects in the sample. Further production of springs by the contractor prior to approval of the first article sample shall be at the contractors risk. Acceptance 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-82684 (OS) 4.4.2 Lot. A lot
20、 shall consist of all springs, manufactured under essentialme same conditions, from the same wire stock, by one miufaeturer, at one plant, and to be offered for delivery at one time, 4.4.3 Scampling or quality conformance inspection. 4,4.3.1 Sampling for test, Sampling for torque tests shall be in a
21、ccordance with inspection level III of MIL-STD-105. . 4.41 3.2 Sampling for examination,. Sampling for examination shall be in accordance with inspection level II of MIL-STD-105. 4. li Pint article inspection. The first article inspection shall consist of the torque test of 4.7 and the visual and di
22、mensional examination of 4.8 performed on the sample springs specified in 4.4,l. Failure of any first article spring shall be grounds for rejection of the first article sample. 416 Quality conformance inspection. The quality conformance inspection shall consist of the torque test of 4.7 and the exam
23、inations of 4.8 and 4.9, defective for tests and 6.5 defects per one hundred springs for examinations. delivered on contract. The acceptable quality levels (AQLs) shall be 2.5 percent Individual springs failing the torque test shall not be 4.6.1 Classiication of characteristics, The characteristics
24、verified bv the tests an8 examination herein are classified as critical, major, or Ininor in accordance with WR-43A. Characteristics are identified by the symbol (C) and major characteristics by the symbol (M). the serial number of the test of examination. which are not annotated with a classificati
25、on code are classified minor. Tests and examinations that verir critical The number following the classification symbol indicates Tests and examinations 4.7 Torque tests, The torque test shall be performed in accordance with the following using a torque tester in accordance with FIGURE 1 as approved
26、 by the procuring activity prior to testing (see 6.2) : a. Mount the torque tester vertically in a vice so that the plane of the wheel is vertical and the weights hang unobstructed. b, Place the sample spring on the ,750 to ,753 inch diameter test shaft, insert the horizontal tang into the guide hol
27、e in the end plate and tighten the end plate screws taking care that the end plate does not contact the shaft. e. pin just meets the vertical spring tang. reading in degrees. Rotate the wheel counterclockwise by hand until the contact Record the initial scale 4 Provided by IHSNot for ResaleNo reprod
28、uction or networking permitted without license from IHS-,-,-I MIL-S-82684 5b W 9999906 0222qLL 5 I d, Attach a 3.40 k ,Q5 lb. welght to the cable. taD the base O? - . record the scale reading, e. Remove the 3.4 lb weight and substitute a 4.00 & ,O5 lh weight, tap the plate several times, and record
29、the scale reading, .- - - - - - _ _ and 30 to 52“, recpectively. outside the specified range at 3,4 lbs or 4, O lbs * REject any spring that has a final reading 4.8 Visua1 ruid dimensional examination. Each sanmle sorim selected with 3.9 and dimensionally examined to verify conformance wiih. I Dwn.
30、2841637. I 5. PACKAGING k .- I contract see 6.2). I marked in accordice wlthLMIL-STD-129. “- - - - assemblies (Dwgs. 2841587 and 2806546) and-for the Mk 56 Modsc , rocket motor assemblies (kas, 2841586. 2807085 and 32744071. I a. b. Quantity required. c. Place of delivery. d, e. f. Title, number and
31、 date of this specification, When a first article sample is required (see 3.1, 4.4.1 and 6,3). Inspection conditions when other than as specifled see 42) Assigned activity for first article inspection see 4.4.1 and 6.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without li
32、cense from IHS-,-,-MIL-S-BZbq Cb = 9999906 0222912 7 /- MIL-S- 82684 (OS) gD h. i. Level of preservation and packaging required (see 5.1). Level of packing required (see 5.2). Any special markings required (see 5.3). 6.2.2 Contract data requirements. Any data required for delivery in connection with
33、 this document shall be specified on a DD Form 1423 incorporated into the contract. on completed (numbered) DIDs (Data Item Descriptions/DD 1664) which will be documented in the Applicable ADL (Authorized Data List), Such daia will be delivered as identified U.3 First article sample. When a first ar
34、ticle sample is required, it shall be tested and approved under the appropriate provisions of 7-104.55 of the Armed Services P.rocurement Regulations (ASPR) , The contracting officer should include specific instructions in all pro- curement instruments regarding arrangements for examinations, test a
35、nd approval of the first article sample. Custodian: Navy - QS Preparing Activity: Navy - OS Proj ect No, 5360-NO04 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
