SAE J193-1996 BALL STUD AND SOCKET ASSEMBLY.TEST PROCEDURES.pdf
《SAE J193-1996 BALL STUD AND SOCKET ASSEMBLY.TEST PROCEDURES.pdf》由会员分享,可在线阅读,更多相关《SAE J193-1996 BALL STUD AND SOCKET ASSEMBLY.TEST PROCEDURES.pdf(13页珍藏版)》请在三一文库上搜索。
1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1996 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American
4、National Standard J193 REAF. JUN96 Issued1970-08 Reaffirmed1996-06 Superseding J193 FEB87 BALL STUD AND SOCKET ASSEMBLYTEST PROCEDURES ForewordThis Document has also changed to comply with the new SAE Technical Standards Board format. 1.ScopeThe test procedures describe a method to laboratory test s
5、uspension and steering system ball stud and/or socket assemblies for functional characteristics. This procedure is an extension of SAE J491b recommended practice on dimensional recommendations for ball studs towards a vehicle application. The tests are conducted either on ball studs individually or
6、on complete integral assemblies representing the application. 1.1ObjectiveTo provide a uniform method of testing ball studs and ball stud and socket assemblies to ensure that the parts will meet functional requirements of the application. 2.References 2.1Applicable PublicationsThe following publicat
7、ions form a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J491Steering Ball Studs and Socket Assemblies SAE Paper
8、 #660102Simulation of Field Loading in Fatigue Testing 3.Test ProceduresThe test procedures for suspension and steering components with few exceptions can be similar because all ball stud and socket assemblies are subject to axial, lateral, and longitudinal forces, differing only in the direction an
9、d magnitude of loading depending on the application. The test procedures cover the following characteristics: 5.1 Ball Stud 5.1.1 Ball Stud Impact Strength 5.1.2 Ball Stud Yield 5.1.3 Ball Stud Tensile Load 5.2 Ball Stud and Socket SAE J193 Reaffirmed JUN96 -2- 5.2.1 Ball Stud to Socket Rotating and
10、 Oscillating Torque 5.2.2 Ball Stud to Socket Axial End Movement 5.2.3 Ball Stud to Socket Cam-Out Strength 5.2.4 Ball Stud and Socket Assembly Fatigue and Heat Test 5.2.5 Ball Stud and Socket Pull-Out and Push-Out Strength 5.2.6 Ball Stud and Socket Angularity 4.Loading and Cycle LifeThe loading us
11、ed in the test procedures should be as representative as possible in magnitude and direction with loads encountered in the design application. Recommended cycle life is provided where applicable with each procedure. To determine preliminary loading magnitude and direction, a layout design model of t
12、he complete suspension and steering system, possibly computerized, should be utilized. A paper analysis can be made solving for the component loading by assuming maximum “G“ forces at the wheel/ground contact. Using a vehicle with a similar suspension and/or steering system design, a program loading
13、 procedure can be utilized to obtain a more realistic loading assessment. With this procedure, key load carrying components are strain gaged to measure the load magnitudes, direction, frequency of load application and phasing (timing of load application). The vehicle is driven over a circuit of road
14、 input events that simulate expected usage. From this data, histograms of loading magnitude versus cumulative load application cycles can be obtained that will establish the laboratory ultimate strength peak loads as well as a group of fatigue and wear test loads and associated cycles for a specific
15、 vehicle life. Representative program loading procedures are described in many SAE reports (SAE Report #660102). 5.Objectives and Test Procedures 5.1Ball StudTests conducted on individual ball studs. 5.1.1BALL STUD IMPACT STRENGTH 5.1.1.1ObjectiveTo determine the impact strength of the ball stud. 5.
16、1.1.2ProcedureThe test is applicable to either suspension or steering system studs. Mount the stud in a rigid fixture as shown in Figure 1. Lock stud in fixture by torquing the retaining nut to design specifications. Apply an impact load to exceed the expected impact load in the vehicle application.
17、 Increase the impact load incrementally until a separation occurs to determine the load capability. Only one impact per stud is permissible. The stud must not fail by brittle fracture. Bending deflection must be 10 degrees minimum. SAE J193 Reaffirmed JUN96 -3- FIGURE 1IMPACT TEST 5.1.2BALL STUD YIE
18、LD 5.1.2.1ObjectiveTo determine at what load condition the ball stud will take a permanent set without fracture. 5.1.2.2ProcedureThe test is applicable to either suspension or steering system studs. The test fixture is shown in Figure 2. Grind a small flat on the head of the stud for accuracy of rea
19、ding, to receive the dial indicator or other measuring device. Install the ball stud in the fixture with the mating taper hole in such a manner that a load can be applied to the stud at right angles to the stud centerline and opposite the flat ground on the stud. Lock stud in fixture by torquing the
20、 retaining nut to design specification. Preload the stud. Set dial indicator or other measuring device to zero. Take deflection and set readings in desired increments to permanent set range. Stud yield load is equal to load required to permanently set stud without surface cracks or failure and may b
21、e used to select stud application. SAE J193 Reaffirmed JUN96 -4- FIGURE 2TEST FIXTURE 5.1.3BALL STUD TENSILE LOAD 5.1.3.1ObjectiveTo determine the tensile load capability of the ball stud. 5.1.3.2ProcedureThe test is applicable to either suspension or steering system studies depending on the intende
22、d application, but generally would be appropriate for a suspension ball stud where the predominant loading would be in a tensile direction. Mount the stud in a load/deflection testing machine as shown in Figure 3. CAUTIONUse care to prevent eccentric loading. A typical tensile load application rate
23、is 5 mm/min. Record load and mode of fracture for each sample tested. 5.2Ball Stud and SocketTests conducted on complete ball stud and socket assemblies. 5.2.1BALL STUD TO SOCKET ROTATING AND OSCILLATING TORQUE 5.2.1.1ObjectiveTo ensure desired rotating and oscillating torque is obtained. 5.2.1.2Pro
24、cedureThe test is applicable to either suspension or steering system components. The assembly should be held in a manner to prevent addition of external clamping pressure which may affect torque readings. SAE J193 Reaffirmed JUN96 -5- FIGURE 3TENSILE TEST 5.2.1.2.1Breakaway TorqueAssemblies should b
- 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:
- SAE J193-1996 BALL STUD AND SOCKET ASSEMBLY.TEST PROCEDURES J193 1996 ASSEMBLY TEST
链接地址:https://www.31doc.com/p-3678318.html