1、Designation: F 1046 01Standard Guide forPreparing Artificially Worn Passenger and Light Truck Tiresfor Testing1This standard is issued under the fixed designation F 1046; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide outlines the preparation of artificially worntires by tread rubber removal (cutting or grinding, or both)
3、forsubsequent performance testing. The purpose is to permit thepreparation of test tires with a uniformly reduced tread groovedepth and tread geometry that will yield repeatable test resultswhile avoiding the time-consuming and costly over-the-roadnatural wearing of tires.1.2 The values stated in SI
4、 units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health
5、 practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:F 421 Test Method for Measuring Groove and Void Depthin Passenger Car Tires2F 762 Test Method for Determining Change in Groove (orVoid) Depth With Distance Traveled for Passen
6、ger CarTires23. Terminology3.1 Definitions:3.1.1 groove, na void that is relatively narrow (comparedto its length).3.1.2 groove average depth L, nthe average of all tiregroove depth measurements in a single groove.3.1.3 groove (void) depth, L, na measurement of theperpendicular distance from a real
7、or calculated reference planedefined by edges of two adjacent ribs (lugs) to the lowest pointof contact in the groove (void).3.1.4 treadwear indicator, na raised portion of a groovebottom or a void bottom that is molded in a tire at fairly regularintervals around the circumference to provide a visua
8、l indica-tion that most of a tread has been worn away.3.1.5 void, na volume (in the tread band) defined by thelack of rubber; the depth dimension of this volume may varyfrom point to point in on the tread band.4. Summary of Guide4.1 This guide outlines a method for groove depth measure-ment and for
9、reduced groove depth calculation followed byremoval of a calculated amount of tread rubber and for finalsurface grinding to obtain a smooth finish. An optional tirebreak-in period to follow this operation is described. Tech-niques for photography and measurements to document thefinal tread character
10、istics are described.5. Significance and Use5.1 Tires having reduced groove depth are required in sometire tests to determine changes in performance as a tire wearsin service. This guide describes the preparation of artificiallyworn tires. This guide is not meant to replace the developmentof worn ti
11、res through over-the-road travel when naturally worntires are required. Further refinements of these techniques maybe made with increased field experience.5.2 The amount of tread rubber to be removed (groovedepth reduction) and the final surface texture are selectedaccording to the requirements of a
12、 particular testing program.5.3 The type of test program determines the actual tolerancenecessary on the final groove depth. For example, snowtraction will require very close control of the final groove depthwhile vehicle handling tests can accommodate a wider toler-ance on the final groove depth.6.
13、 Apparatus6.1 Tread Depth Gage, meeting the requirements of TestMethod F 421.6.2 Equipment, for determining tread radius.6.3 Tire Tread Removal Machine, with accessories to re-move tread rubber in a predetermined manner.7. Procedure7.1 Method SelectionThe actual method utilized deter-mines the accur
14、acy and uniformity of the final groove depth.With equipment monitoring the tread surface relative to the1This guide is under the jurisdiction of ASTM Committee F09 on Tires and isthe direct responsibility of Subcommittee F 09.20 on Vehicular Testing.Current edition approved Oct. 10, 2001. Published
15、December 2001. Originallypublished as F 1046 - 87. Last previous edition F 1046 - 93 (1997)e1.2Annual Book of ASTM Standards, Vol 09.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.axis of wheel rotation, a tolerance of 60.51 mm (
16、60.020 in.)is obtainable with most existing equipment. For other equip-ment that monitors the tire tread surface or base of the groove,a tolerance of 62 % groove depth is obtainable.7.2 Groove Depth Measurement:7.2.1 Mount the tire on a rim approved by the Tire and RimAssociation (T artificially wor
17、n; light truck tires; passengertires; preparing; procedure; testingAcceptableUnacceptableNOTE 1Typical reduced groove depth tire surface after tread rubberremoval (33 magnification). Break-in will smooth the surface even more.FIG. 1 Tire Tread Surface ConditionsF1046013ASTM International takes no po
18、sition respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibi
19、lity.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to A
20、STM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the addres
21、s shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 2 Set-Up for Photographing Tread Surface TextureF1046014
