1、AN AM E R IC AN NAT IO NAL STANDARDASME B89.3.7-2013Granite Surface PlatesINTENTIONALLY LEFT BLANK ASME B89.3.7-2013Granite SurfacePlatesAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USADate of Issuance:June 26,2013This Standard will be revised when the Society approves the issuance
2、 of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Periodically certain actions of the ASME B89 Committee may be published as Code Cases.Code Cases and interpretations are published on the ASME Web site under the Committee Pages
3、 athttp:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items,or to correct typographical or grammatical errorsin codes and standards.Such errata shall be used on the date p
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5、ction.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individ
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7、,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability fo
8、rinfringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency
9、representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which preclud
10、es the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 20
11、13 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B89 Committee.viIntroduction.vii1General.12Definitions.13References.14General Requirements.2Figures1Exaggerated View of a Surface Plate With Twist.22Surfa
12、ce Plate,Style 1,No Ledge,Rectangular or Square.33Surface Plate,Style 2,Two-Ledge,Either Direction,Rectangular or Square.34Surface Plate,Style 3,Four-Ledge,Rectangular or Square.35Surface Plate,Style 4,No Ledge,Round.36Support Layout for Rectangular Surface Plate.57Support Layout for Round Surface P
13、late.5Tables1Common Sizes and Flatness Tolerances.42Tolerances for Local Variations in Flatness Using a Repeat Reading Gage.63Restrictions on Surface Area for Flatness and Twist.6Mandatory AppendixITesting.9Nonmandatory AppendicesAMineralogical and Physical Properties.14BThickness.15CSupports.20DFac
14、tors Distorting the Work Surface.21ECare of Granite Surface Plates.24FGuidance to Estimating Uncertainty in Surface Plate Measurement.25GTraceability.31iiiFOREWORDThis ASME Standard is a revision of the 1973 Federal Specification GGG-P-463c which hasbeen used extensively in American industry since i
15、ts publication.Although the measurementmethodsforsurfaceplateshadalreadybeeninusesomedecadespriortotheFederalSpecification,it did serve to document these methods.In addition,it provided common language and termsof classification for surface plate manufacturing and commerce.While little has changed w
16、ithregard to measurement methods and the flatness tolerances of the various plate grades are stillrelevant today,ASME B89 Division 3 decided an effort was justified to modernize the document.Most notably,a more complete glossary was added with currently accepted definitions,metricunits were added where appropriate,and a new format was used that should be more familiarto current users of the Standard.This Committee also recognized the need for updates to asurface plate specification to incorporat
