1、AN AMERICAN NATIONAL STANDARDASME Y14.8-2009Revision of ASME Y14.8M-1996 (R2008)Castings, Forgings, andMolded PartsEngineering Drawing and Related Documentation PracticesASME Y14.8ADOPTION NOTICEASMEY14.8,Casting,Forgings,andMoldedParts,wasadoptedon2April2009forusebytheDepartmentofDefense(DoD).Propo
2、sedchangesbyDoDactivitiesmustbesubmittedtotheDoDAdoptingActivity:Commander,U.S.ArmyResearch,DevelopmentandEngineeringCenter(ARDEC),ATTN:RDAR-AAR-QES-E,PicatinnyArsenal, NJ 07806-5000. Copies of this document may be purchased from The American Society of MechanicalEngineers(ASME),22LawDrive,P.O.Box29
3、00,Fairfield,NJ07007-2900,http:/www.asme.org.Custodians: AdoptingActivity:ArmyAR ArmyARNavySA (ProjectDRPR-2009-005)AirForce16ReviewActivities:ArmyCR,MI,PT,TMNavyAS,CG,CH,EC,MC,NP,TDAirForce13,99DLADHOSDSENSANSOtherCM,MP,DC2NOTE: The activities listed above were interested in this document as of the
4、 date of this document. Sinceorganizationsandresponsibilitiescanchange,youshouldverifythecurrencyoftheinformationaboveusingtheASSISTOnlinedatabaseathttp:/assist.daps.dla.mil.ASMCN/A AREADRPRDISTRIBUTIONSTATEMENTA.Approvedforpublicrelease,distributionisunlimited.ASME Y14.8-2009Revision of ASME Y14.8M
5、-1996 (R2008) Castings, Forgings, and Molded PartsAN AMERICAN NATIONAL STANDARDEngineering Drawing and Related Documentation PracticesDate of Issuance: September 30, 2009This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or writ-ten interp
6、retations of the requirements of this Standard issued to this edition.Periodically certain actions of the ASME Y14 Committee may be published as Cases. Cases are published on the ASME Web site under the Committee Pages at http:/cstools.asme.org as they are published.ASME is the registered trademark
7、of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Stan-dards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned in
8、terests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse”
9、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 any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement
10、 of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.Participation by federal agency represe
11、ntative(s) or person(s) a liated with industry is not to be interpreted as government or industry en-dorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes
12、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 EngineersThree Park Avenue, New York, NY 10016-5990Copyright
13、 2009 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.iiiCONTENTSForeword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vCommi
14、ttee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viCorrespondence with the Y14 Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、. . . . . . . . . . . . . . . . . . . . . . . . . viiSection 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.2 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . .11.3 Reference to This Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.4 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . .11.5 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.6 Dimensioning and Tolerancing . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.7 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.8 Defi nitions . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Section 2 Drawing Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . .42.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42.2 Separate View Drawing Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42.3 Combined View Drawing Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42.4 End Item Drawing Method . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Section 3 Drawing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73.1 General . . . . . . . . . . . . . . . . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25、. . . . .73.3 As-Cast/As-Forged/As-Molded Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73.4 Corner Radii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、. . . . . . . . . . . . . . . . . .83.5 Die Closure Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.6 Draft Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.7 Fillet Radii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.8 Flash Extension . . . . . . . . .
28、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.9 Orientation of Forging Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
29、.10 Form Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.11 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30、. . . . . . . . . . . . . . . . . . . . . . . .143.12 Match Draft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.13 Mismatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.14 Parting Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.15 Sharp Corners . .
32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183.16 Grain Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33、 . . . . . . . . . . . .183.17 Special Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183.18 Profi le Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.19 Digital Data File Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.20 Wall Thickness as a Refi nement of Profi le of a Surface . . .
35、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Section 4 Datum Referencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214.1 General . . . . . . . . . . . . . . . .
36、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214.2 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、. . . . .214.3 Datum Targets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.4 Datum Reference Frame Established by Machined Datum Features . . . . . . . . . . . . . . . . . . . . . . . . . .
38、 . . . . .224.5 Machine Tooling Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.6 Equalizing Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39、 . . . . . . . . . . . . . . . . . . . . . .224.7 Datum Targets and Profi le Tolerancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24ivSection 5 Drawing Notes and Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345.2 Drawing Items . . . . . . . . . . . . . .
41、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345.3 Sample General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345.4 Sam
42、ple Local Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35Nonmandatory AppendicesA Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
43、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37B Sample Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41C Form and Proportion of Symbols . . . . . . . . . . . . . . . . .
44、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44vFOREWORDThis revision of ASME Y14.8M-1996 expands the scope of the Standard to include molded parts. Changes to both the text and fi gures have been made to better illustrate drafting practices pertaining to ca
45、sting/forging and molded part drawings.Major changes include the addition of symbology for parting line, all around this side of parting line, and all over this side of parting line. Plus draft, minus draft, and draft included are explained. A section on CAD model requirements is added. The effect o
46、f applying profi le of a surface with datum references to surfaces containing datum targets is explained. Wall thickness is defi ned. Text and fi gures are revised to refl ect these changes.Suggestions for improvement of this Standard are welcome. They should be sent to The American Society of Mecha
47、nical Engineers; Attn: Secretary, Y14 Standards Committee; Three Park Avenue; New York, NY 10016-5990.This edition was approved by the American National Standards Institute on March 31, 2009.viASME Y14 COMMITTEEEngineering Drawing and Related Documentation Practices(The following is the roster of th
48、e Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSF. Bakos, Jr., ChairW. A. Kaba, Vice ChairC. J. Gomez, SecretarySTANDARDS COMMITTEE PERSONNELA. R. Anderson, Dimensional Dynamics, LLC A. Krulikowski, E ective Training, Inc.F. Bakos, Consultant P. J. McCuistion, Ohio
49、UniversityJ. V. Burleigh, Consultant J. D. Meadows, James D. Meadows in other instances, fi gures are incomplete by intent. Numerical values of dimensions and tolerances are illustrative only.1.4.1 Drawings in Digital FormatThe fi gures in this Standard are illustrated in 2D drawing presentation. The principles shown in these fi gures may be presented in digital (3D) format per ASME Y14.41.1.5 NOTESNotes herein in capital letters are intended to appear on drawings. Notes in lower case are explanatory only and are not intended to appear on drawings. 1.6 DIMENSIONING AND TO
