GMW-14165-2006.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure Fasteners GMW14165 Torque, Tension, and Angle Evaluation of Fastened Joints Copyright 2006 General Motors Corporation All Rights Reserved February 2006 Originating Department: North American Engineering Standards Page 1 of 10 1 Scope Note: Nothing in t
2、he specification supersedes ap- plicable laws and regulations unless specific ex- emption has been obtained. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. To determine the dynamic torque, tension, and angle characte
3、ristics of the threaded fastener joint. 1.2 Foreword. 1.2.1 Limitations. This procedure does not apply to Pulse tools. 1.2.2 Unless otherwise specified, any requirements or direction provided in the Test Request docu- mentation will supersede this test procedure. 1.3 Applicability. Unless otherwise
4、specified, this procedure applies to the initial tightening event of joints using threaded fasteners with new thread and bearing surfaces and new clamped members. 2 References Note: Only the latest approved standards are ap- plicable unless otherwise specified. 2.1 External Standards/Specifications.
5、 None 2.2 GM Standards/Specifications. GM500M GMN10085SOP GMN10075 GMN10086SOP GMN10079 GMW25 GMN10080 2.3 Additional References. Data Acquisition System Manufacturers Operating Procedure. D.C. Electric Tool Manufacturers Operating Proce- dure. 3 Resources 3.1 Facilities. GM Approved Laboratory or l
6、ocation for this test procedure. 3.2 Equipment. 3.2.1 Torque angle transducer. 3.2.2 Data acquisition system capable of collecting data at a sampling rate of at least 1000 Hz, plotting data at user specified scales, and identifying data at all points on the curve. 3.2.3 Strain gauged fastener, force
7、 washer, or fas- tener prepared (Ref. GMN10080, GMN10086SOP) for ultrasonic measurement. 3.2.4 Ultrasonic measurement device (if required). 3.2.5 Tightening tool. 3.2.6 Appropriate fixturing, bedplate, or slotted ta- ble. 3.2.7 Strain indicator. 3.3 Test Vehicle/Test Piece. 3.3.1 A complete bill of
8、materials of required test pieces will be specified in the test request docu- mentation. 3.3.2 Unless otherwise specified a minimum of 8 samples are to be used for this procedure. 3.4 Test Time. Calendar Time: 2 days. 3.5 Test Required Information. Test request documentation shall outline specific i
9、nformation and test parameters (Reference Appendix A). 3.6 Personnel/Skills. Test Technician shall be qualified on the basis of appropriate education, training, experience, and/or demonstrated skills. 4 Procedure 4.1 Preparation. 4.1.1 Unless otherwise specified in the test re- quest, samples are to
10、 be tested in the as received condition. This excludes any condition specifically caused by material storage or configuration (e.g., if debris falls into a threaded hole from laboratory rework, it is acceptable to blow debris out of holes). 4.1.2 Any modifications to parts, not specifically requeste
11、d in the test request, that may affect test results, are be documented in the test notes. All test configurations, parts and noted deviations to be approved prior to executing test. 4.2 Conditions. 4.2.1 Environmental Conditions. -,-,- GMW14165 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 Gener
12、al Motors Corporation All Rights Reserved Page 2 of 10 February 2006 4.2.2 Test Conditions. Deviations from the re- quirements of the procedure shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.2.2.1 Unless otherwise specified
13、, test conditions shall be as outlined on test request documentation. 4.2.2.2 Optional. Strength of fasteners with re- spect to minimum material specifications may be evaluated prior to this testing by one or more of the methods outlined in GMW25 (GM500M) Mechani- cal and Material Requirements for M
14、etric Series Externally Threaded Fasteners. 4.3 Instructions. 4.3.1 Review part quantities and condition. 4.3.2 Secure test part to T-slot table or fixture. 4.3.3 Select proper tool, strain gauged fastener, force washer, or fastener prepared for ultrasonic measurement, and transducer with angle enco
15、der. (Reference GMN10085SOP). 4.3.4 Configure data acquisition system to collect torque, tension, and angle data (GMN10079, GMN10075). 4.3.5 Align tool and torque transducer to prevent side loading. 4.3.6 Unless otherwise specified, test requestor is to approve test set-up. 4.3.7 Take photograph or
16、digital image of test con- figuration. 4.3.8 Measure and document tool free spinning speed. 4.3.9 Joint shall be tightened to the specifications outlined in Test Request Documentation. Test shut off parameters may include but are not limited to: 4.3.9.1 110% of fastener proof load. 4.3.9.2 Maximum t
17、orque/angle specification target. 4.3.9.3 Joint failure. 4.3.9.4 Maximum fastener calibrated load. 4.3.9.5 Maximum torque capability of tightening tool. 4.3.10 Unless otherwise specified, run the first sample recording torque, tension, angle, and fail- ure mode, if any. Review with requestor and re-
18、 ceive approval prior to proceeding. 4.3.11 If necessary, make corrections to test con- figuration to comply with instructions of requestor. 4.3.12 Complete test matrix. 4.3.13 Summarize results according to require- ments in Section 5 of this procedure. 5 Data 5.1 Calculations. Not applicable. 5.2
19、Interpretation of Results. Not applicable. 5.2.1 Summary of Results. Required. 5.2.1.1 Provide detail of failure modes consisting of, but not limited to, fastener fracture, component fracture, component distortion or internal or exter- nal thread stripping (If applicable). 5.2.1.2 Test incidents to
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