1、Designation:E2905/E2905M13Standard Practice forExamination of Mill and Kiln Girth Gear TeethElectromagnetic Methods1This standard is issued under the fixed designation E2905/E2905M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the
2、year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice describes a two-part procedure for electro-magnetic evaluation on gear teeth on mill and kiln gear
3、drivesand pinions.The first part of this practice details the ability todetect 100%of surface-breaking discontinuities only in theaddendum,dedendum,and root area on both the drive side andnon-drive side of the gear tooth using an eddy current array.The second part of the examination is to size or me
4、asureaccurately the length and depth of any cracks found in theseareas using electromagnetic methods.No other practice ad-dresses the use of electromagnetic methods for the detectionand sizing of surface-breaking discontinuities on mill and kilnring gear teeth.1.2 This practice is used only for crac
5、k detection,alignmentissues,wear patterns,and early signs of macro-pitting.It willnot illustrate a full gear tooth analysis.Visual examination byan experienced gear technician is the only way to analyze fullygear teeth wear patterns and potential failure.1.3 Two technicians,or one technician and a t
6、echnicalassistant,are typically required for this practice.One technicalassistant guides the probe and the technician operates thecomputer/software and analyzes the gear teeth condition.1.4 It is important that the appropriate method standards,such as Guide E709 and Practice E2261,if the alternating
7、current field measurement approach is used for crack sizing,accompany the technician when performing the examination.1.5 It is recommended that the technician reviews theappendixes in this practice in advance of starting the job.1.6 A clean gear is recommended for a complete gearanalysis.Depending o
8、n the lubrication used,the technician,indiscussion with the client,shall determine the appropriatecleaning procedure,if cleaning is required.If an oil bathlubrication system is used,ensure the gear teeth surface isclean.If an asphaltic-based or synthetic-based lubricant isused,refer to the annexes a
9、nd appendices in this practice.1.7 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems
10、 may result in noncon-formance with the standard.1.8 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 practices and determine the applica-bility of regul
11、atory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E709 Guide for Magnetic Particle TestingE1316 Terminology for Nondestructive ExaminationsE2261 Practice for Examination of Welds Using the Alter-nating Current Field Measurement TechniqueE2884 Guide for Eddy Current Testing of
12、Electrically Con-ducting Materials Using Conformable Sensor Arrays2.2 AIA Standard:3NAS 410 Certification and Qualification of NondestructiveTest Personnel2.3 ANSI/AGMA Standards:4AGMA 912-A04 Mechanisms of Gear Tooth FailuresInformation SheetANSI/AGMA 1010 E-95 Standard for Appearance of GearTeethT
13、erminology of Wear and FailureANSI/AGMA 1012 G-05 Gear Nomenclature,Definition ofTerms1This test method is under the jurisdiction of ASTM Committee E07 onNondestructive Testing and is the direct responsibility of Subcommittee E07.07 onElectromagnetic Method.Current edition approved Dec.1,2013.Publis
14、hed December 2013.Originallyappeared in 2012.Last previous edition appeared in 2012 as E2905/E2905M 12.DOI:10.1520/E2905_E2905M-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information
15、,refer to the standards Document Summary page onthe ASTM website.3Available from Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,Ne
16、w York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.4 ANSI/ASNT Standards:4ANSI/ASNT-CP-189 Qualification and Certification of Non-destructive Testing PersonnelSNT-TC-1A Recommended Practice for Personnel Qualifi-cation and Certification in Nondestructive Testing3.Terminology3.1 DefinitionsFor definitions of terms relating to thisguide re