1、AMSC N/A FSC 5985 MIL-DTL-3970F 29 February 2012 SUPERSEDING MIL-DTL-3970E 24 September 2007 DETAIL SPECIFICATION WAVEGUIDE ASSEMBLIES, RIGID, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE. 1.1 Scope. This spec
2、ification covers the general requirements for rigid waveguide assemblies, hereinafter referred to as “assemblies” (see 6.1). 1.2 Part or Identifying Number (PIN). PINs to be used for rigid waveguide assemblies acquired to this specification are created with the letter “M“, the basic number of the sp
3、ecification sheet, and an assigned dash number (see 3.1), as shown in the following example: M3970/7 001 Military designator and Dash Number Specification sheet number 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. T
4、his section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of docu
5、ments cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
6、 documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-85 - Waveguides, Rigid, Rectangular, General Specification for. MIL-DTL-3922 - Flanges, Waveguide, General Purpose, General Specification for. MIL-DTL-14072 - Finishes for Ground Based
7、Electronic Equipment. INCH-POUND Comments, suggestions or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to Tubesampsdla.mil. Since contact information can change, you may want to verify the currency of th
8、is address information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3970F 2 DEPARTMENT OF DEFENSE STANDARD MIL-STD-202 - Electronic and Electrical Component Parts. (Copies of
9、these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or https:/assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this
10、document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract (see 6.2). ASME INTERNATIONAL (ASME) ASME Y14.5M - Dimensioning and Tolerancing. (Copies of this document are available online at http:/www.asme.org or fro
11、m ASME INTERNATIONAL, Three Park Avenue, New York, NY 10018.) NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-Z540.3 - Calibration Laboratories and Measuring and Test Equipment. (Copies of the above document are available online at http:/www.ncsli.org or from National Conference of Standar
12、ds Laboratories (NCSL), 2995 Wilderness Place, Suite 107, Boulder CO 80301-5404.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the tex
13、t of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applica
14、ble specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 First article. Assemblies furnished under this specification shall be products that have been tested and passed first article inspection (see
15、 4.5 and 6.3). 3.3 Materials. Materials shall be as specified herein (see 3.1); however, when a definite material is not specified, a material shall be used which will enable the assemblies to meet the performance requirements of this specification. Acceptance or approval of any constituent material
16、 shall not be construed as a guaranty of the acceptance of the finished product (see 4.7.1). 3.3.1 Aluminum and aluminum alloy surfaces. Except for interior and mating surfaces, all aluminum or aluminum alloy surfaces must be finished in accordance with MIL-DTL-14072, type I, finish P513B. 3.3.2 Cop
17、per or copper alloy surfaces. Except for interior and mating surfaces, all copper or copper alloy surfaces must be finished in accordance with MIL-DTL-14072, type I, finish P213.1B. 3.3.3 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used
18、 in intimate contact with each other (see 6.4.1). 3.3.4 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of rigid waveguide assembly components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minim
19、um of 3 percent lead, by mass (see 6.6). 3.4 Interface and physical dimensions. Assemblies shall be of the design, interface, and physical dimensions specified (see 3.1 and 4.7.1). Dimensions and tolerances shall be interpreted in accordance with ASME-Y14.5M. Provided by IHSNot for ResaleNo reproduc
20、tion or networking permitted without license from IHS-,-,-MIL-DTL-3970F 3 3.4.1 Flanges. Flanges used as a part of the assembly (see 3.1) shall conform to the requirements of MIL-DTL-3922. 3.4.2 Waveguides. Waveguides used as a part of the assembly (see 3.1) shall conform to the requirements of MIL-
21、DTL-85. 3.5 Voltage standing wave ratio (VSWR). When assemblies are tested as specified in 4.7.2, the VSWR shall not exceed the value specified (see 3.1). 3.6 Insertion loss. When assemblies are tested as specified in 4.7.3, the insertion loss shall not exceed the value specified (see 3.1). 3.7 Pres
22、surization. When assemblies are tested as specified in 4.7.4, there shall be no leakage. Following the test, VSWR shall be as specified in 3.5. 3.8 Salt atmosphere (corrosion). When assemblies are tested as specified in 4.7.5, there shall be no evidence of destructive corrosion. Following this test,
23、 VSWR and insertion loss shall be as specified in 3.5 and 3.6, respectively. Destructive corrosion shall be construed as any type of corrosion that interferes with mechanical or electrical performance. 3.9 Vibration, high frequency. When assemblies are tested as specified in 4.7.6, there shall be no
24、 physical damage to the assembly. Following this test, VSWR, insertion loss, and pressurization shall be as specified in 3.5, 3.6, and 3.7, respectively. 3.10 Shock (specified pulse). When assemblies are tested as specified in 4.7.7, there shall be no physical damage to the assembly. Following this
25、test, VSWR, insertion loss, and pressurization shall be as specified in 3.5, 3.6, and 3.7, respectively. 3.11 Power handling capability (when specified, see 3.1). When assemblies are tested as specified in 4.7.8, there shall be no evidence of arcing, flashover, charring, breakdown, or overheating. A
26、fter this test, VSWR and insertion loss shall be as specified in 3.5 and 3.6, respectively. 3.12 Marking. Assemblies must be marked in accordance with MIL-STD-1285, method I, on the external surface, with the military part or identifying number (PIN) (see 3.1), and the manufacturers source code. Mar
27、king characters must be approximately .125 inch (3.18 mm) in height for assemblies covering frequencies up to 26.5 GHz and approximately .063 inch (1.60 mm) in height for assemblies covering frequencies above 26.5 GHz. The manufacturers name or trademark may also be marked on the assembly provided s
28、uch letters are not expressly forbidden in the contract or purchase order. The preferred and permissible marking is as follows: Preferred: Military PIN: M3970/1-XX-XXXX Manufacturer source code: ZZZZZ Permissible M3970/ 1-XX-XXXX ZZZZZ 3.13 Recycled, recovered, or environmentally preferable material
29、s. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.14 Workmanship. Assemblies shall be manuf
30、actured in such a manner as to be uniform in quality and the assembly shall be free from tool marks, burrs, deep scratches, pits, corrosion, cracks, rough edges, chips, and other defects that will affect life, serviceability, or appearance. 4. VERIFICATION 4.1 Test equipment and inspection facilitie
31、s. Test equipment and inspection facilities of sufficient accuracy and quantity to permit performance of the required inspections shall be the responsibility of the manufacturer. Establishment and maintenance of a calibration system to control the accuracy of the measuring and test equipment shall b
32、e in accordance with NCSL-Z540.3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3970F 4 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Materials inspection (see 4.3). b. First a
33、rticle inspection (see 4.5). c. Conformance inspection (see 4.6). 4.3 Materials inspection. Materials inspection shall consist of certification that the materials (see 3.3 through 3.3.3) used in fabricating the assembly are in accordance with the applicable referenced specifications or requirements
34、prior to such fabrication. 4.4 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions specified in the “GENERAL REQUIREMENTS” of MIL-STD-202. 4.4.1 Equivalent test methods. The use of equivalent test methods is allowed prov
35、ided it is demonstrated to the acquiring activity or their agent that the equivalent test methods in no way relax the requirements of this specification and that the equivalent test methods are approved by the acquiring activity for use by that manufacturer before testing is performed (see 6.3.1). 4
36、.5 First article inspection. First article inspection shall be performed by the manufacturer after award of contract and prior to production at a location acceptable to the Government on sample units produced with equipment and procedures normally used in production. This inspection consists of meet
37、ing all requirements of 4.5.1 through 4.5.4 inclusive and of table I. First article approval is valid only on the contract or purchase order under which it is granted. TABLE I. First article approval inspection. Inspection Requirement paragraph Method paragraph Visual and mechanical inspection - - -
38、 - - - - VSWR - - - - - - - - - - - - - - - - - - - - - - - - - Insertion loss- - - - - - - - - - - - - - - - - - - - - Pressurization- - - - - - - - - - - - - - - - - - - Salt atmosphere (corrosion)- - - - - - - - - - - - - Vibration, high frequency - - - - - - - - - - - - - Shock (specified pulse)
39、 - - - - - - - - - - - - - - Power handling capability (when specified)- 3.1, 3.3 through 3.4, 3.12, and 3.14 3.5 3.6 3.7 3.8 3.9 3.10 3.11 4.7.1 4.7.2 4.7.3 4.7.4 4.7.5 4.7.6 4.7.7 4.7.8 4.5.1 Sample size. One each of the first article approval Part of Identifying Numbers (PIN) for which first arti
40、cle approval is sought, shall be subjected to first article inspection. 4.5.2 Inspection routine. Sample units shall be subjected to the first article approval inspections specified in table I, in the order shown. 4.5.3 Failures. One or more failures shall be cause for refusal to grant first article
41、 approval. 4.5.4 Disposition of first article sample units. Sample units which have been subjected to first article approval testing shall not be delivered on any contract or purchase order. The Government reserves the right to retain the same units or to require the manufacturer to furnish the samp
42、le units with the first article inspection report. 4.6 Conformance inspection. 4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A and B inspections. 4.6.1.1. Inspection lot. An inspection lot shall consist of all assemblies of the same military PIN
43、produced under essentially the same condition, and offered for inspection at one time. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3970F 5 4.6.1.2 Group A inspection. Group A inspection shall consist of the inspections specified in table
44、II in the order shown. TABLE II. Group A inspection. Inspection Requirement paragraph Method paragraph Visual and mechanical inspection - - - VSWR - - - - - - - - - - - - - - - - - - - - - - - - - - 3.1, 3.3 through 3.4, 3.12, and 3.14 3.5 4.7.1 4.7.2 4.6.1.2.1 Sampling plan. All units shall be subj
45、ected to group A inspection. No failures are allowed. If one or more sample units fail, the sample shall be considered to have failed. 4.6.1.2.2 Rejected lots (group A inspection). If an inspection lot is rejected, the contractor may rework it to correct the defects or screen out the defective units
46、, and resubmit for reinspection. Such lots shall be separate from new lots and shall be clearly identified as reinspected lots. 4.6.1.3 Group B inspection. Group B inspection shall consist of the tests specified in table III in the order shown, and shall be made on units which have been subjected to
47、 and have passed group A inspection. TABLE III. Group B inspection. Inspection Requirement paragraph Method paragraph Insertion loss - - - - - - - - - - - - - - - - - - - - - - - Pressurization - - - - - - - - - - - - - - - - - - - - 3.6 3.7 4.7.3 4.7.4 4.6.1.3.1 Sampling plan (group B inspection).
48、The sampling plan shall be as specified in table IV. TABLE IV. Group B sampling plan. Quantity Units tested 1 - 5 6 - 50 51 - 99 100 and greater 0 1/ 1 2 2% 1/ After three consecutive buys of five units or less over a period of 18 months, at least one unit shall be subjected to group B inspection on
49、 the fourth buy. 4.6.1.3.2 Rejected lots (group B inspection). If an inspection lot is rejected, the contractor may rework it to correct the defects, or screen out the defective units, and resubmit for reinspection. Such lots shall be separate from new lots, and shall be clearly identified as reinspected lots. 4.6.1.3.3 Disposition of sa
