GMW-14164-2006.pdf
《GMW-14164-2006.pdf》由会员分享,可在线阅读,更多相关《GMW-14164-2006.pdf(12页珍藏版)》请在三一文库上搜索。
1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure Fasteners GMW14164 Torque, Tension, Angle, and Compression Evaluation of Fastened Joints Copyright 2006 General Motors Corporation All Rights Reserved February 2006 Originating Department: North American Engineering Standards Page 1 of 12 1 Scope Note:
2、 Nothing in the specification supersedes applicable laws and regulations unless specific exemption 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, angle, an
3、d compression characteristics of the threaded fastener joint with bushing inner sleeve as compressed member. 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 documentation will
4、supersede this test procedure. 1.3 Applicability. Unless otherwise 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 applicable u
5、nless otherwise specified. 2.1 External Standards/Specifications. 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 Pro
6、cedure. 3 Resources 3.1 Facilities. GM Approved Laboratory or location 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
7、at all points on the curve. 3.2.3 Strain gaged fastener, force washer, or fastener prepared (Reference GMN10080, GMN10086SOP) for ultrasonic measurement. 3.2.4 Ultrasonic measurement device (if required). 3.2.5 Strain gaged bushing inner sleeves. 3.2.6 Load frame. 3.2.7 Tightening tool. 3.2.8 Approp
8、riate fixturing, adapters, bedplate, or slotted table. 3.2.9 Strain indicator. 3.3 Test Vehicle/Test Piece. 3.3.1 A complete bill of materials of required test pieces will be specified in the test request documentation. 3.2.2 Unless otherwise specified a minimum of 8 joints are to be used for this p
9、rocedure plus a minimum of two additional bushing inner sleeves for bushing load deflection test. 3.4 Test Time. 3.4.1 Calendar time: 1 to 2 weeks 3.5 Test Required Information. Test request documentation shall outline specific information and test parameters (Reference Appendix A). 3.6 Personnel/Sk
10、ills. Test Technician shall be qualified on the basis of appropriate education, trai ning, experience and/or demonstrated skills. 4 Procedure 4.1 Preparation. 4.1.1 Bushing Load Deflection Test. 4.1.1.1 Fasteners, bushings, and associated components should be inspected for conformity to GMW14164 GM
11、WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 12 February 2006 specification (including surface specification for ends of bushing, dimensional measurements on the sleeve and brackets, or a measurement of the gap between them) per applicable d
12、rawing(s) or as directed by the test requestor. 4.1.1.2 Install the adapters in the load frame. Install and hook up the instrumentation. The linear displacement measurement device should be mounted so that it measures between the adapters of the ram and the plate in as direct a manner as possible wi
13、th its centerline as close to the ram centerline as the test parts will permit. Fixturing deflection may be erroneously interpreted as test part deflection if care is not exercised in the set up. 4.1.1.3 Calibrate the instrumentation to record expected full scale values for force and deflection. 4.1
14、.1.4 Run a force-deflection test up to maximum requested load with fixturing and adapters alone (no test parts). If desired to minimize load frame height readjustment, a solid steel block with parallel sides and height similar to bushing may be placed between the load frame adapters. 4.1.1.5 Start t
15、he recording device and begin loading the fixturing. 4.1.1.6 Continue increasing the force until the maximum requested load is achieved. 4.1.1.7 Decrease the load to 0 while still recording. 4.1.1.8 If requested, repeat steps 4.1.1.4 to 4.1.1.7. 4.1.1.9 Remove the inner sleeve from a bushing assembl
16、y, by cutting away the surrounding metal and rubber. Do not damage bushing inner sleeve. Inner sleeves may be available separately from bushings for prototype level parts. 4.1.1.10 Install the bushing inner sleeve test specimen into the load frame to load the sleeve axially. 4.1.1.11 Start the recor
17、ding device and begin loading the bushing. Use displacement control at a rate of 0.1 mm/sec. 4.1.1.12 Continue increasing the force until the maximum requested load is achieved. Test shut off parameters may include but are not limited to: 4.1.1.12.1 110% of fastener proof load. 4.1.1.12.2 Onset of p
18、ermanent bushing deformation. 4.1.1.12.3 Load capability of the load frame and/or load cell. 4.1.1.13 Decrease the load to 0 while still recording. 4.1.1.14 Optional: Repeat 4.1.1.10 through 4.1.1.13 using a complete bushing assembly (inner sleeve plus surrounding metal and rubber still intact). 4.1
19、.1.15 Repeat 4.1.1.10 through 4.1.1.14 for the total number of samples requested. 4.1.1.16 Visually inspect the test parts and record if or how they were deformed. 4.1.1.17 Photograph the test set up and the test components after test. 4.1.1.18 Review load vs. displacement plots with test requestor.
20、 Curve from sample with fixturing and adapters alone (no test parts) should be linear with minimal offset Curves from bushing inner sleeve and complete bushing assembly samples should be linear up to desired calibration load, which is to be 110% of fastener proof load unless otherwise specified by t
21、est requestor. 4.1.2 Bushing Strain Gaging and Calibration 4.1.2.1 Remove the remaining inner sleeves from the bushing assemblies, by cutting away the surrounding metal and rubber. Do not damage bushing inner sleeve. Inner sleeves may be available separately from bushings for prototype level parts.
22、4.1.2.2 If there are teeth or serrations on the ends of the sleeves then aluminum plates should be used between the loading device and sleeve ends. 4.1.2.3 Optional: Cycle inner sleeves at least 5 times up to the desired calibration load of the sleeve then back down to zero load on a load frame. To
23、remove residual stresses in the sleeves (work hardening processes) operate at a slow ram rate. 4.1.2.4 Attach strain gages on the inner sleeves, full bridge wired for axial loading, and cycle for at least 5 times. 4.1.2.5 Balance the strain gaged sleeve, compress to the desired calibration load, and
24、 return to zero load. Record calibration data 5 times for both increasing and decreasing load, from the load cell and strain gages and average the results. 4.1.2.6 Evaluate the data and repeat 4.1.2.5 if necessary. 4.1.2.7 Provide error graph, sensitivity, shunt cal load value, shunt cal resistance
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- GMW 14164 2006
链接地址:https://www.31doc.com/p-3765665.html