1、AN AM E R IC AN NAT IO NAL STANDARD ASME B89.7.2-2014Revision of ASME B89.7.2-1999(R2004)Dimensional Measurement PlanningASME B89.7.2-2014Dimensional Measurement PlanningA N A M E R I C A N N A T I O N A L S T A N D A R DRevision of ASME B89.7.2-1999(R2004)Two Park Avenue New York,NY 10016 USADate o
2、f Issuance:December 29,2014This Standard will be revised when the Society approves the issuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Interpretations are published on the Committee Web page and under go.asme.org/Int
3、erpsDatabase.Periodically certain actions of the ASME B89 Committee may be published as Cases.Cases are published on the ASME Web site under the B89 Committee Page at go.asme.org/B89committee as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Page
4、s to provide correc-tions to incorrectly published items,or to correct typographical or grammatical errors in codes and standards.Such errata shall be used on the date posted.The B89 Committee Page can be found at go.asme.org/B89committee.There is an option available to automatically receive an e-ma
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11、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 2014 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.iiiCONTENTSFore
12、word .ivCommittee Roster.viCorrespondence With the B89 Committee .vii1 Scope .12 Definitions .13 Normative References .24 Dimensional Measurement Planning .25 Dimensional Measurement Plan Approval .36 Dimensional Measurement Plan Application .37 References .3Nonmandatory AppendicesA Sample Dimension
13、al Measurement Plan.5B Gage Selection.17C Dimensional Measurement Uncertainty.21D Probabilities of Pass and Fail Errors.29ivFOREWORDThe intent of this Standard is to facilitate agreement between suppliers and customers by specifying a standard method for assessing the dimensional acceptability of wo
14、rkpieces.Components of the method are the preparation of an adequate dimensional measurement plan and the use of the plan in making measurements.Major inputs to the method are dimensional specifications developed,for example,in compliance with ASME Y14.5-2009,Dimensioning and Tolerancing 1.The first
15、 publication of ASME Y14.5 was a significant step forward in manufacturing because it defined methods for the unambiguous expression of design intent on workpiece drawings.ASME Y14.5 specifies design intent in terms of workpiece features(e.g.,cylinders,planes,spheres,etc.).A feature is dimensioned a
16、nd toleranced by specifying boundaries within which the infinite number of points on the feature surface must lie(for surface geometries)or by specifying a boundary within which the axes must lie(axes control).Any adequate assessment of whether a manu-factured feature complies with an ASME Y14.5 drawing specification must consider this infinite number of points.In the early days of ASME Y14.5,serious attempts to determine compliance of workpiece features with drawing specifications were based on