1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW3208 Rotary Abrasion Test, Taber Type Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope Note: Nothing in this standard supercedes applicable laws and
2、regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This standard is used to determine abrasion resistance of materials using a rotary platform tester. 1.2 Foreword. Not applicable. 1.3 Applicability. Not app
3、licable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW3221 2.3 Additional References. None. 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Taber Rotar
4、y Type Abrasion Tester or equivalent. 3.2.2 Vacuum. Must have sufficient suction to remove particles during the test. 3.2.3 Weights supplied by abrasion tester manufacturer shall be added to the arm spindle, if necessary, to achieve the total required mass specified. If a mass is labeled 500 g, that
5、 is the total mass applied to the test specimen when the weight is added to the arm spindle. (See Table 1). Table 1: Possible Mass Combinations Arm spindle No added weight 250 g = 250 g Arm spindle Plus weight labeled 500 g = 500 g Arm spindle Plus weight labeled 1000 g = 1000 g Note: Each rotating
6、platform has two arm spindles. The weight specified in the material specification is the weight required on each of the two arm spindles individually. If the material specification requires 1000 g, each arm spindle individually must be 1000 g (250 g arm spindle + 750 g weight). Each 750 g weight is
7、actually labeled 1000 g. The weight is labeled to indicate the total weight after having been placed on the arm spindle. 3.2.4 Apparatus for conditioning to the appropriate requirements as described in GMW3221, unless otherwise specified in the relevant material specification. 3.2.5 Test Material. C
8、opyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3208 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 2 of 4 3.2.5
9、.1 One-hundred fifty (150) grit silicon carbide sandpaper supplied by Taber Industries as S-11, or equivalent. 3.2.5.2 Abrasion wheels, as supplied by Taber Industries, as required in the applicable material specification. 3.3 Test Vehicle/Test Piece. Not applicable. 3.4 Test Time. Not applicable. 3
10、.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Procedure A test specimen is abraded using a dual, opposing, circular, rubbing action with a prescribed abrasive and a prescribed weight. The test specimen mounted on a platform, turns on a horizontal axis, against
11、 the sliding rotation of two abrading wheels. The abraded area of the test specimen is evaluated visually. 4.1 Preparation. 4.1.1 A minimum of three test specimens shall be cut to the dimensions specified in the material specification following sampling guidelines specified. 4.1.2 The hole diameter
12、must be within 1 mm of the spindle diameter and shall be cut in the exact center of each test specimen. Do not fold the specimen to locate the exact center. A template may be used to overlay on the specimen to locate the center. 4.1.3 Follow mounting instructions in the material specification if it
13、is not possible to use the standard mounting card. 4.1.4 Condition test specimens for a minimum of 24 h to the requirements of GMW3221 Code A. 4.2 Conditions. 4.2.1 Environmental Conditions. Not applicable. 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agre
14、ed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.3 Instructions. 4.3.1 Install the specified abrasion wheels and additional weights, if necessary, as required in the equipment material specification. 4.3.2 The abrasion wheels shall be resurfaced
15、, using sandpaper prior to each test. The sanding disk shall be used for 50 cycles maximum for the same wheel type. Resurface the wheel for a minimum of 25 cycles or until the original color of the wheel is restored. Never resurface a wheel with the sandpaper mounted over the test specimen. 4.3.3 Ad
16、just the vacuum setting to the maximum power setting of 100 unless otherwise specified. 4.3.4 Clamp the sample in the holder so that the test specimen is smooth and wrinkle-free. Next install the flange, then the retaining nut. Lastly, install the retaining ring and tighten to be snug. Do not make t
17、he ring so snug that it causes the specimen to buckle. 4.3.5 Slowly lower the abrasion wheels gently on the test specimen. 4.3.6 Adjust the height of the vacuum nozzle so that it does not touch the test specimen and is a minimum of 6 mm above the surface of the test specimen. Maintaining the vacuum
18、nozzle too close to the specimen during testing, for an extended period of time, may damage the vacuum. 4.3.7 Abrade the test specimen for the prescribed number of cycles. Based on different geographic regions, the rotating platforms may rotate at 60 rpm 5 rpm or they may rotate at 70 rpm 5 rpm. For
19、 some materials, it may be possible that either rate of rotation may be specified in the material specification if it is known to affect the wear test results. 4.3.8 Remove the test specimen. Note: Fabrics shall not be cleaned or vacuumed prior to evaluation. 5 Data 5.1 Calculations. Not applicable.
20、 5.2 Interpretation of Results. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3208 Copyright 2012 General Motors Company All Rights Res
21、erved June 2012 Page 3 of 4 5.2.1 Ignoring the inner and outer approximately 2 mm of the abraded area and using a 10X magnifier, evaluate the remainder of the abraded area. 5.2.2 Assign a rating from Table 2 which most closely describes the abraded area. Table 2: Rating Class Definition 10 No change
22、 9 8 Slight change Only detectable upon close visual examination 7 6 Moderate change Noticeable change from original 5 4 Significant change from original that would be considered objectionable 3 2 Severe change Destructive abrasion that would include wearing through the surface 1 5.3 Test Documentat
23、ion. Report the abrasion rating assigned to the test specimens and submit the specimens with the test report. Report the revolutions per minute of the rotating platforms for the machine that was used for testing. 6 Safety This standard may involve hazardous materials, operations, and equipment. This
24、 standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicab
25、le. 7.2 Acronyms, Abbreviations, and Symbols. rpm revolutions per minute 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW3208 9 Release and Revisions This standard was originated in February 1999. It was first approved in June 2000. It was
26、 first published in June 2000. Issue Publication Date Description (Organization) 1 JUN 2000 Initial publication. 2 OCT 2000 Editorial changes. (GMNA) 3 OCT 2005 Global Textile Development Group revision. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot fo
27、r ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3208 Copyright 2012 General Motors Company All Rights Reserved June 2012 Page 4 of 4 Issue Publication Date Description (Organization) 4 MAY 2007 Added note to section 3.3; 5.3.7 Added
28、information regarding differences in RPM; Section 7.0 added requirement to report RPM of equipment used. 5 JUN 2012 Five year refresh of standard, updated in a Test Procedure template (previously published as a Test Method). Added clarification on conditioning and resurfacing wheels. (Textiles & Trim Materials Global Subsystem Leadership Group) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
