NASM 1312-15-1997 Fastener Test Methods - Methods 15.pdf

1、NASM 1312-15-1997 Fastener Test Methods - Methods 15_NASM1312-15 29 August 1997 ADOPTION NOTICE NASM13 12-1 5, “Fastener Test Methods Method 15 Torque Tension” was adopted on 29 August 1997 for use by the Department of Defense OD). Proposed changes by DoD activities must be submitted to the DoD Adop

2、ting Activity: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3 Highway 547, Lakehurst, NJ 08733-5100. DoD activities may obtain copies of this standard from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 1 1-5094. The private s

3、ector and other Government agencies may purchase copies fiom the Aerospace Industries Association, 1250 Eye Street W, Washington, DC 20005. NASM1312-15 Should be used instead of MIL-STD-1312-15, which was cancelled on 29 August 1997. Custodians: Navy - AS Air Force - 11 Army - AV Preparing activity:

4、 Navy - AS (Project No. 53GP-0285-15) Review Activities: Navy - AS, SH Air Force - 1 1 Army - AV, AR DLA - IS COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD iCOPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOClATION OF

5、AMERICA, INC ALL RIGHTS RESERVED FASTENER TEST METHODS METHOD 15 TORQUE - TENSION I iNASM1312-15 STVW PRACTICE THE INITIAL RELEASE OF THIS DOCUMENT SUPERSEDES MIL-STD-13 12-1 5 I I. .* LIST OF CURRENT SHEETS NO. 9 8 7 6 5 4 3 2 1 REV. NEW NEW NEW NEW NEW NEW NEW NEW NEW 53GP SHEET 1 OF 8 APPROVAL DA

6、TE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CWM RESPECTING (1) THE SUITABILITYOF ITEMS FOR ANY PARTICULAR APPLICA

7、TION OR (2)THE EXlSTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesSTD-AIA/NAS NASM13LZ-LS-ENGL 1777 0318743 0505117 T30 NATIONAL AEROSPACE STANDARD i(BC0PYRIGHT 1997 AEROSP

8、ACE INDUSIXES ASSOCIATION OF AMERICA, MC ALL RIGHTS RESERVED NASM1312-15 111 ,I 1.1 1 ;II I FOREWORD This standard sets forth standard test procedures for determining the room temperature torque- tension relationship for threaded fasteners. 1 s/ # I ,*B I I I I. It SHEET 2 APPROVAL DATE AUGUST 1997

9、USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIN SUPPLIERS OR CERTIN CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) TH

10、E EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling Services 1 . 1.1 . 2 . 2.1 2.1.1 2.2 3 . 4 . 4.1 4.1.1 4.1.2 4.1.3 4.1.3.1 4.1.3.2 4.1.3.3 4.1.3.4 4.1.4 4.2 5 . 5.1 5.1.1 5.1.

11、2 6 . 6.1 6.1.1 6.1.1.1 Figure 1 . 2 . NATIONAL AEROSPACE STANDARD ;COPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, MC ALL RIGHTS RESERVED : NASM13 12-15 I TABLE OF CONTENTS Sheet SCOPE . 4 Applicabhty . 4 . REFERENCED DOCUMENTS . 4 Government documents . 4 Specifications. standards and

12、handbooks . 4 Other publications . 4 DEFINITIONS . 5 GENERAL REQUIREMENTS . 5 Test apparatus . 5 Hand torque method . 5 Machine torque method . 5 Tension . 5 Load cell system . 5 Tensile machine . . . 5 Bolt tension calibrator . 5 Strain gage . 5 Test fixtures . 6 Test specimen . 6 DETAIL REQUIREMEN

13、TS . 6 Test procedures . 6 Assembly . 6 Loading . 7 .NTS . :i;/ 1 .( II . 7 Teif report . . . I . 7 Load-torque diagram . 7 Single value data . 7 i FIGURES Sheet Testing assembly . 8 Load-torque diagram . 9 SHEET 3 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STAN

14、DARD IS ENTIRELY VOLUNTARY AIA WES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS . AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLlCABlUm THERETO OF PATENT OR TRADEM

15、ARK RIGHTS . COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesSTD.AIA/NAS NASM1312-15-ENGL L777 E 0318743 05051L9 803 9 NATIONAL AEROSPACE STANDARD pCOPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, MC ALL RIGHTS RESERVED .I NASM

16、l312-15 1.1 Applicability. This test method outlines standard procedures for determining the room temperature torque-tension relationship for threaded fasteners. It is not limited by configuration size. The following methods are specified: a, Hand torque method using torque wrenches. b. Machine torq

17、ue method using torsion machine. 2 REFERENCED DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards and handbooks. Unless otherwise specified, the following specifications, standards and handbooks of the issue listed in the current Department of Defense Index of Specifications and Stan

18、dards (DoDISS) and the supplement thereto (if applicable), form a part of this standard to the extent specified herein. STANDARD FEDERAL GGG-W-686 Wrench, Torque (Copies of specifications, standards, handbooks, drawings and publications required by contractors in connection with specific acquisition

19、 fbnctions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications, The following document(s) forms a part of this speoification to the extent specified herein. ,The issues of the documents which are indicated as DODadopted shall be the iss

20、ue in the current DoDISS and the supplement thereto, if applicable. 1; i III AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) (4 I. ASTM E 74 verification of Calibration Devices for Verifying Testing Machines (Applications for copies should be addressed to the American Society for Testing and Mater

21、ials, 1916 Race Street, Philadelphia, PA 19103.) SHEET 4 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA WES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CL

22、AM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD PCOPYRIG

23、lIT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA MC ALL RIGHTS RESERVED NASM1312-15 I . 1 , ,Q 3. DEFINI TIO I I Not applicable. 1 4. GENERAL REQUIREMENTS 4.1. Test apparatus. 4.1.1 Hand torque method. Torque wrenches calibrated for accuracy within the limits specified by GGG-W-686 will be requi

24、red as well as the necessary adapters to fit the configuration of the fastener under test. A suitable method conforming to 4.1.3 shall be used to determine the tension, Fixtures shall conform to 4.1.4. 4.1.2 Machine torque method. A torsion machine capable of measuring and indicating within an accur

25、acy of 2 percent of the scale employed shall be required as well as the necessary adapters to fit the configuration of the fastener under test. A suitable method (see 4.1.3) shall be used to determine the tension. Fixtures shall conform to 4.1.4. 4.1.3 Tension. The induced tensile load shall be meas

26、ured by one of the following instruments, which shall have been verified for accuracy not more than 3 months before being used. 4.1.3.1 Load cell svstem. A precision load cell, which has been calibrated in accordance with ASTM E 74 in a universal testing machine, and of sufficient capacity to develo

27、p the full tensile load of the fastener under test shall be used. Appropriate strain gages shall be fastened by standard approved methods to the load cell essentially as indicated on figure 1. Hardened steel washers or plates as shown on figure 1, of sufficient strength to sustain the full tensile l

28、oad of the fastener shall be required. In addition, a strain indicator is required. The complete system shall be accurate within 2 percent of the test load. 4.1.3.2 Tensile machine. A tension or universal tension machine capable of measuring and indicating the induced tension to within one percent o

29、f the test load shall be used. The machine shall be capable ofpaintaining the induced load upon cessation of the torqdeprocess. 4.1.3.3 Bolt tensin calibrator. A bolt tension calibrator of the closed hydiaubc system type with suitable dials to read the induced loading directly shall be used. The cal

30、ibrator shall be accurate within 4 percent of the test load and shall be capable of maintaining the induced load upon cessation of the torque process. i III 4.1.3.4 Strain pa= A precision strain gaged bolt or stud calibrated in a tensile machine shall be used, together with an accurate strain indica

31、tor. The complete system shall be accurate within 2 percent of the test load. SHEET 5 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA

32、 MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUlTABILlTY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR ApPLlCABlLITy THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIO

33、NAL AEROSPACE STANDARD FOPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICq INC ALL RIGHTS RESERVED NASMl312-15 ,I , 4,Q 4.1.4 Test fixt$rks: Unless otherwise specified, all fixtures used shall dhed all the following requirements: 4.1.4.1 Fixture bolt size shall be the basic diameter of the ex

34、ternally threaded fastener being tested plus 0,001-inch with a tolerance of +0.004 -0.000-inch. (Note that sufficient clearance must be provided to prevent bending of long shank bolts.) In the case of long shank bolts, the hole size in all fixtures other than the ones in contact with the bolt head b

35、earing surface and the nut bearing surface may be enlarged to provide clearance for the shank. The hole in the plate washer in contact with the head bearing surface of the external fastener shall be chamfered to provide clearance of the head to shank fillet of the external fastener. The hole shall b

36、e perpendicular to the fixture bearing surface within f10 minutes. I(, 4.1.4.2 Fixtures shall be steel, heat treated to a hardness of 45HRC min, with a surface finish on bearing surfaces not to exceed 32 micro inches. When washers are required they shall be hardened and finished as fixtures. Unless

37、otherwise specified, washers may be reused provided that they are resurfaced and that they remain thick enough to sustain the load without distortion. Unless otherwise specified, the bearing surface shall be free of dirt or lubricant. 4.1.4.3 All fixtures and washers shall be retained in such a mann

38、er that they are not permitted to rotate. 4.1.4.4 Companion fasteners, when required shall be in accordance with the product specification. Unless otherwise specified, new fasteners shall be used for each test. 4.2 Test specimen. The number of specimens to be tested fiom each lot shall be in accordance with the procurement document or product specification. The test specimen shall not be altered in any manner beyond the specification prior to testing. Unless otherwise specified, all tests shall be run without supplementary lubrication. 5. DETAIL REQUIREMENTS 5.1 Test procedures: