DLA MIL-DTL-287 J-2012 WAVEGUIDE ASSEMBLIES FLEXIBLE TWISTABLE AND NON-TWISTABLE GENERAL SPECIFICATION FOR.pdf

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1、AMSC N/A FSC 5985 INCH-POUND MIL-DTL-287J 10 April 2012 SUPERSEDING MIL-DTL-287H 28 September 2007 DETAIL SPECIFICATION WAVEGUIDE ASSEMBLIES, FLEXIBLE, TWISTABLE AND NON-TWISTABLE, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of D

2、efense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for twistable and non-twistable, flexible waveguide assemblies (hereinafter referred to as “assemblies”) (see 6.1). 1.2 Classification. Assemblies consist of the following classes, as specified (see 3.1 and 6.5.1): Class

3、Performance characteristics 1 - Twistable (mates with rigid rectangular waveguide components). 2 - Non-twistable (mates with rigid rectangular waveguide components). 3 - Extra-flexible, twistable (mates with rigid rectangular waveguide components). 1.2.1 Part or Identifying Number (PIN). The militar

4、y PIN consists of the letter “M” followed by the basic number of the specification sheet, an assigned dash number (see 3.1), and a coded four-digit number indicating the length. M287/1 -01- 0071 Military designator Dash number Length (in inches) and specification sheet number (see NOTE) NOTE: The fo

5、ur digits indicate the nominal relaxed length of the assembly based on the requirements of 3.4.4. Example: “-0071” is the number used to identify a length of 7.50 inches (190.5 mm). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this sp

6、ecification. This 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 requir

7、ements of documents 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, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise spec

8、ified, the issues of these documents are those cited in the solicitation or contract. 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

9、can change, you may want to verify the currency of this 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-287J 2 COMMERCIAL ITEM DESCRIPTIONS A-A-59588 - Rubber

10、, Silicone. 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-5541 - Chemical Conversion Coatings on Aluminum and Aluminum Alloys. DEPARTMENT OF DEFENSE ST

11、ANDARDS MIL-STD-202 - Electronic and Electrical Component Parts. (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications.

12、The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-B700 - Electrodeposited Coatings o

13、f Silver for Engineering Use. (ASTM publications are available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or online from http:/astm.org.) NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-Z540.3 - Calibration of Measuring and Test Equipment, Requirements

14、 for. (Copies are available online at http:/www.ncsl.org or at National Conference of Standards Laboratories, 2995 Wilderness Place, Suite 107, Boulder, CO 80301-5404.) SAE INTERNATIONAL (SAE) AEROSPACE MATERIALS SPECIFICATIONS (AMS) SAE-AMS-S-8802 - Sealing Compound, Temperature Resistant, Integral

15、 Fuel Tanks and Fuel Cell Cavities, High Adhesion. SAE-AMS-R-25988 - Rubber, Fluorosilicone Elastomer, Oil-and-Fuel-Resistant, Sheets, Strips, Molded Parts, and Extruded Shapes. (Copies are available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or online from http:/www.

16、sae.org.) 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 text of this document takes precedence. Nothing in this document, however,

17、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 applicable specification sheets. In the event of any conflict between the requi

18、rements of this specification and of the specification sheets, 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 4.5 and 6.4). Provided by IHSNot for ResaleNo reproduction or netw

19、orking permitted without license from IHS-,-,-MIL-DTL-287J 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, with acquiring activity approval, which will enable the assemblies to meet the performance requi

20、rements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of acceptance of the finished product (see 4.7.1). 3.3.1 Flange. The material for the assembly flange shall be selected from the material of MIL-DTL-3922. 3.3.2 Jacket (when applica

21、ble). Unless otherwise specified (see 3.1), the jacket material shall be in accordance with 3.3.2.1, 3.3.2.2, 3.3.2.3 or 3.3.2.4. 3.3.2.1 Neoprene. Neoprene jackets shall be molded at least .0625 inch (1.588 mm) thick. 3.3.2.2 Plastic. Plastic jackets shall be fabricated from sealing compound in acc

22、ordance with SAE-AMS-S-8802, suitable for brush application with a minimum of 0.5 to 2 hours application time. 3.3.2.3 Silicone rubber. Silicone rubber jackets shall be in accordance with A-A-59588, class 2a. 3.3.2.4 Fluorosilicone rubber. Fluorosilicone rubber jackets shall be in accordance with SA

23、E-AMS-R-25988. 3.3.3 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used in intimate contact with each other (see 6.5.10). 3.3.4 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally.

24、 Tin content of rigid waveguide assembly components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.10). 3.4 Interface and dimensions. Assemblies shall be of design, interface and physical dimensions specified (see 3.1, 4.7.1). 3

25、.4.1 Flange. All assemblies shall be terminated by flanges. Unless otherwise specified (see 3.1), the flange shall mate electrically and mechanically with flanges covered by MIL-DTL-3922. The flange face shall make an angle of 90null 15 with the E-plane and the H-plane of the internal surfaces of th

26、e assembly. The finish for the flanges shall be as specified herein (see 3.4.3, 3.4.3.1 and 3.4.3.2 for approved finishes). Alternative finishes may be used, with acquiring activity approval, provided they permit flanges to meet the performance requirements of this specification. Acceptance or appro

27、val of any alternative finish shall not be construed as guaranty of acceptance of the finished product (see 4.7.1). The optional use of “butt” type flanges is permitted. 3.4.2 Flexible waveguides. The physical dimensions of flexible waveguides shall be such that the operating frequency range is equa

28、l to that of the mating rigid waveguides of MIL-DTL-85. Surface finishes of flexible waveguides shall be as specified herein (see 3.4.3 and 3.4.3.3 for approved finishes). Alternative finishes may be used, with acquiring activity approval, provided they permit flexible waveguides to meet the perform

29、ance requirements of this specification. Acceptance or approval of any alternative finish shall not be construed as a guaranty of acceptance of the finished product (see 4.7.1). 3.4.3 Assembly finish. Specified finish shall be applied after assembly of flanges to flexible waveguides. Approved surfac

30、e finishes for flanges and for flexible waveguides shall be specified in 3.4.3.1 through 3.4.3.3. Equivalent finishes meeting the requirements of this specification may be used with acquiring activity approval. 3.4.3.1 Finish for copper alloy flanges. Unless otherwise specified (see 3.1), all copper

31、 alloy flanges shall be silver plated at least .0003-inch (0.008 mm) thick in accordance with ASTM-B700, with supplementary tarnish-resistant treatment (chromate treatment). 3.4.3.2 Finish for aluminum alloy flanges. Unless otherwise specified (see 3.1), all aluminum or aluminum alloy flanges which

32、are used with copper alloy, OFHC copper, or beryllium copper flexible waveguides shall be copper or electroless or electrolytic nickel plated in the recess of the flange or where the waveguide interfaces with the flange. After the waveguide and flange are soldered or brazed together, the solder poin

33、t and flange shall be chemically treated in accordance with MIL-DTL-5541 or equivalent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-287J 4 3.4.3.3 Flexible waveguide finish. With the exception of OFHC, all copper alloy, or beryllium coppe

34、r flexible waveguides, internal surfaces shall be silver plated in accordance with ASTM-B700, with supplementary tarnish-resistant treatment (chromate treatment), at least .0003-inch (0.008 mm) thick. OFHC copper shall be chemically treated with copper iridite; all aluminum or aluminum alloy flexibl

35、e waveguide surfaces shall be chemically treated in accordance with MIL-DTL-5541. 3.4.4 Assembly length. The nominal relaxed length of an assembly shall be measured from the face of one flange to the face of the other and shall be measured in inches and halves of an inch. Assembly length tolerances

36、shall be in accordance with table I. TABLE I. Length tolerance. Assembly length (Inches) Tolerance (Inch) Up to 36, inclusive Over 36 and up to 72, inclusive Over 72 .090 (2.29 mm) .125 (3.18 mm) .250 (6.35 mm) For indicating the length in the military part number (see 6.6), the following shall appl

37、y: a. When the required length is less than 10 inches (254 mm), the number shall be preceded by 2 zeros. b. When the required length is from 10 to 100 inches (2540 mm), the number shall be preceded by 1 zero. 3.5 Performance requirements. 3.5.1 Insertion loss. When assemblies are tested as specified

38、 in 4.7.2, the insertion loss shall not exceed the value specified (see 3.1). 3.5.2 Stability of insertion loss. When assemblies are tested as specified in 4.7.3, the maximum insertion loss shall not exceed the value specified (see 3.1) by more than 25 percent. 3.5.3 Voltage standing wave ratio (VSW

39、R). When assemblies are tested as specified in 4.7.4, the VSWR shall not exceed the value specified (see 3.1). 3.5.4 Pressurization. When assemblies are tested as specified in 4.7.5, there shall be no leakage or, when applicable, loss of adherence of the jacket. Following this test, the stability of

40、 insertion loss and VSWR shall be as specified in 3.5.2 and 3.5.3, respectively. 3.5.5 Cold bending. When assemblies are tested as specified in 4.7.6, there shall be no checks, cracks, fractures or other flaws in the jacket or metal structure, as applicable. Following this test, pressurization shall

41、 be as specified in 3.5.4. 3.5.6 Vibration, high frequency. When assemblies are tested as specified in 4.7.7, there shall be no mechanical damage to the jacket or the metal structure, as applicable. Following this test, the insertion loss and VSWR shall be as specified in 3.5.1 and in 3.5.3, respect

42、ively. 3.5.7 Retention. When assemblies are tested as specified in 4.7.8, to the force specified (see 3.1), there shall be no physical damage to the assembly. The length of the assembly shall not change by more than .060 inch (1.54 mm) per foot of assembly length (see 3.4.4). Following this test, th

43、e VSWR and pressurization shall be as specified in 3.5.3 and 3.5.4, respectively. 3.5.8 Shock. When assemblies are tested as specified in 4.7.9, there shall be no physical damage to the assembly. Following this test, the insertion loss and VSWR shall be as specified in 3.5.1 and in 3.5.3, respective

44、ly. 3.5.9 Salt Atmosphere (Corrosion). When assemblies are tested as specified in 4.7.10, there shall be no evidence of destructive corrosion and the insertion loss, stability of insertion loss, and VSWR shall be as specified in 3.5.1, 3.5.2, and 3.5.3, respectively. Destructive corrosion shall be c

45、onstrued as any type of corrosion which in any way interferes with mechanical or electrical performance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-287J 5 3.5.10 Moisture resistance. When assemblies are tested as specified in 4.7.11, the

46、re shall be no evidence of cracking or, if applicable, separation of the jacket. Following this test, insertion loss, stability of insertion loss and VSWR shall be as specified in 3.5.1, 3.5.2 and 3.5.3, respectively. 3.5.11 Thermal shock. When assemblies are tested as specified in 4.7.12, there sha

47、ll be no evidence of cracking or, if applicable, separation of the jacket. Following this test, pressurization, insertion loss and VSWR shall be as specified in 3.5.4, 3.5.1, and 3.5.3, respectively. 3.5.12 Power handling capability (when specified). When assemblies are tested as specified in 4.7.13

48、, there shall be no cracks, fractures or other flaws in the jacket or metal structure, as applicable (see 3.1). After this test, the insertion loss and VSWR shall be as specified in 3.5.1 and in 3.5.3, respectively. 3.5.13 Bending test. When assemblies are tested as specified in 4.7.14, there shall be no mechanical damage. After this test the measured stability of insertion loss and VSWR shall be as specified in 3.5.2 and in 3.5.3, respectively. 3.5.14 Flexure. When assemblies are tested as specified in 4.7.15, there shall be no mechanical damage. After this test