1、AN AMERICAN NATIONAL STANDARD ASME Y14.31-2014(Revision of ASME Y14.31-2008)Undimensioned DrawingsEngineering Drawing and Related Documentation PracticesASME Y14.31ADOPTION NOTICEASMEY14.31, UndimensionedDrawings,was adoptedon16September 2008foruse bytheDepartment ofDefense(DoD). Proposed changes by
2、 DoD activities must be submitted to the DoD Adopting Activity: Commander, U.S.Army Research, Development and Engineering Center (ARDEC), ATTN: RDAR-EIQ-SE, Picatinny Arsenal, NJ07806-5000. Copies of this document may be purchased from The American Society of Mechanical Engineers(ASME), Two Park Ave
3、nue, New York, NY 10016-5990. http:/www.asme.orgCustodians: Adopting Activity:Army AR Army ARNavy SAAir Force 16 (Project DRPR-2014-005)Review Activities:Army AV, CR, MI, PT, TE, TMNavy AS, CG, CH, EC, MC, SA, SHAir Force 04, 11, 13, 99DLA DH, ISOSDSENSANSOther MP, DC2NOTE: The activities listed abo
4、ve were interested in this document as of the dateof this document. Since organizations and responsibilities can change, youshould verify the currency of the information above using the ASSIST Onlinedatabase at https:/assist.dla.mil.ASMC N/A AREA DRPRDISTRIBUTION STATEMENT A. Approved for public rel
5、ease; distribution is unlimited.ASME Y14.31-2014(Revision of ASME Y14.31-2008)UndimensionedDrawingsEngineering Drawing and RelatedDocumentation PracticesAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: June 18, 2014This Standard will be revised when the Society ap
6、proves the issuance of a new edition.Periodically certain actions of the ASME Y14 Committee may be published as Cases. Cases arepublished on the ASME Web site under the Y14 Committee Page at go.asme.org/Y14committee asthey are issued.Errata to codes and standards may be posted on the ASME Web site u
7、nder 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 posted.The Y14 Committee Page can be found at go.asme.org/Y14committee. There is an option availableto automat
8、ically receive an e-mail notification when errata are posted to a particular code or standard.This option can be found on the appropriate Committee Page after selecting “Errata” in the “PublicationInformation” section.ASME is the registered trademark of The American Society of Mechanical Engineers.T
9、his 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 individuals fromcompetent and concerned interests have had an opportunity to participate. The
10、proposed code or standard was madeavailable 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” any item, construction, proprietary device, or activit
11、y.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 forinfringement of any applicable letters patent, nor assumes any such l
12、iability. 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 representative(s) or person(s) affiliated with industry is not to
13、be interpreted asgovernment or industry endorsement of this code or standard.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 Yo
14、rk, NY 10016-5990Copyright 2014 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the Y14 Committee vi1 General . 12 References 23 Definitions 34 Undimensioned Drawing 55 Applications . 56 Media. 57 Dimensiona
15、l Accuracy Methods . 68 Sheet Arrangement 69 Tolerances. 710 Dimensions 711 Revisions 712 Flat Pattern Development. 8Figures1-1 Undimensioned Drawing Contributors 103-1 Forming and Bending Line Examples . 113-2 Brake Process Example . 123-3 Hydro Process Example 135-1 Contour Definition Drawing Exam
16、ple . 145-2 Printed Circuit Drawing Example . 155-3 Wire Harness Drawing Example 165-4 Template Example 175-5 Extrusion Drawing Example 185-6 Art Layout Drawing Example . 195-7 Assembly Drawing Example 205-8 Paint Configuration Drawing Example 217-1 Rotated Grid Lines . 227-2 Dimensional Accuracy Po
17、ints . 237-3 Dimensional Accuracy Point Examples 247-4 Dimensional Accuracy Point Example on Roll Drawing Form 257-5 Registration Mark Examples 268-1 Common Reference for Split Views on Same Sheet 278-2 Common Reference for Split Views on Multiple Sheets 2812-1 Trim After Forming Example . 2912-2 Be
18、nd Instructions Example 3012-3 Flange Angle Examples . 3112-4 Variable Bend Angle Example . 3212-5 Joggle Material Displacement Example 1 3312-6 Joggle Material Displacement Example 2 3412-7 Hydro Joggle Example 3512-8 Hydro Joggle Offset Example . 36iiiFOREWORDUndimensioned Drawings is the type des
19、ignation applied to engineering drawings preparedon environmentally stable material to a precise scale, from which the defined item and thesupporting tooling are produced directly, by photographic or other processes. The drawingpresents the engineering definition graphically rather than by use of nu
20、merical dimensions,although some dimensions may be included to establish a base when tolerances for specificfeatures are smaller than those for surfaces controlled by the precision contour, for verifyingthose surfaces controlled by the precision contour, and for verifying stability of the drawingmat
21、erial. The drawing may utilize flat patterns and similar processing information, as necessary,to economically present the definition.The following is a summary of the significant changes incorporated in this revision:Paragraph 1.3 was added.References were relocated to section 2.Definitions were rel
22、ocated to section 3 and the definition of original was added.SI units were converted to U.S. Customary units.Paragraph 6 was revised to clarify that the requirement for meeting L-P-519 is for originalsstored in a nonelectronic format.In para. 7.4, crop marks were added as an alternative practice.Fig
23、ure 5-6 was revised to show an example of crop marks.When this Standard is specified as a requirement, its defined requirements are assumed tobe consistent with the needs of the user. Therefore, each user provides appropriate applicationconsistent with the environment in which it is applied. Those w
24、ho use this Standard as a require-ment for contractual purposes should keep the following facts in mind:(a) This Standard should be tailored to meet any specific needs. All users shall take carefulnote of the necessity of tailoring this Standard and the contents. The extent of tailoring will inlarge
25、 part be governed by drawing ownership and the logistics intent.(b) It is not the intent of this Standard to prevent individual organizations from designingspecific drawing practices that meet their individual needs, but rather to provide common engi-neering delineation standards to aid the increasi
26、ng interchange of drawings between industry,government, and other users.It is well recognized that individual companies have many detailed requirements for theirspecific method of operation. Consequently, the minimum requirements set forth in this Standardwill provide them flexibility in implementat
27、ion.The successful creation and release of this Standard is attributed to the subcommittee membersand their respective companies.SuggestionsforimprovementofthisStandardarewelcome,andshouldbesenttoTheAmericanSociety of Mechanical Engineers; Attention: Secretary, Y14 Standards Committee,Two Park Avenu
28、e, New York, NY 10016-5990.This Standard was approved as an American National Standard on April 16, 2014.ivASME Y14 COMMITTEEEngineering Drawing and Related Documentation Practices(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSF. B
29、akos, ChairW. A. Kaba, Vice ChairF. Constantino, SecretarySTANDARDS COMMITTEE PERSONNELA. R. Anderson, Dimensional Dynamics, LLCF. Bakos, ConsultantJ. V. Burleigh, UnaffiliatedF. Constantino, The American Society of Mechanical EngineersD. E. Day, TEC-EASE, Inc.K. Dobert, Siemens PLM Software, Inc.B.
30、 A. Harding, Purdue UniversityD. H. Honsinger, ConsultantW. A. Kaba, Spirit AeroSystems, Inc.A. Krulikowski, Effective Training, Inc.SUBCOMMITTEE 31 UNDIMENSIONED DRAWINGSW. A. Kaba, Chair, Spirit AeroSystems, Inc.L. Berquist, John DeereJ. A. Gagnon, UTC Aerospace SystemsvE. F. McCarthy, Raytheon Mi
31、ssile SystemsP. J. McCuistion, Ohio UniversityJ. D. Meadows, James D. Meadows ASME Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300 (www.asme.org)IPC-T-50K, Terms and Definitions for Interconnecting and Packaging Electronic CircuitsIPC-2221B, Generic Standard on Printed Board Desig
32、nPublisher: IPC Association Connecting Electronics Industries (IPC), 3000 Lakeside Drive, 309 S, Bannockburn,IL 60015 (www.ipc.org)L-P-519C, Plastic Sheet: Tracing, Glazed and Matte FinishMIL-PRF-5480G, Data, Engineering and Technical: ReproductionPublisher: Department of Defense, DLA Document Servi
33、ces, 700 Robbins Avenue, Building 4/D, Philadelphia,PA 19111-5094 (http:/quicksearch.dla.mil)3 DEFINITIONSThe following terms are defined as their use applies in this Standard.3.1 Bend Instructionbend instruction: notation of the number of degrees and direction that a flange is formed relative to th
34、e surfaceupon which the bend instruction appears.3.2 Bend Radiusbend radius: the inside radius of a formed part.3.3 Bend Tangent Linebend tangent line: the line at which the flat surface of a part becomes tangent to the radius of the bend. See Fig. 3-1.3.4 Brake Processbrake process: a method of for
35、ming in which the punch is brought down on a flat pattern that is laid on the die,bending the sheet metal up and around the surface of the punch.3.5 Center Line of Bend (CLB)center line of bend (CLB): a line half the distance between the bend tangents that indicates the straight line of contactwhere
36、 the brake press bar will strike the flat pattern to form the bend. See Fig. 3-2.3.6 Common Referencecommon reference: a reference line provided for use as a guide in coordinating the alignment of an item acrossmultiple views or drawing sheets.3.7 Comparator Drawingcomparator drawing: a drawing defi
37、ning a 2D true profile, used for overlay validation viewing of items with acomparator checking machine.3.8 Contour Definition Drawingcontour definition drawing: a drawing containing the mathematical, numeric, or graphic definition required to locateand define a contoured surface; also known as loft
38、drawing.3.9 Dimensional Accuracy Pointsdimensional accuracy points: a set of points located in a rectangular pattern to establish a means of measuringhorizontally, vertically, or diagonally across the drawing to validate dimensional accuracy.3ASME Y14.31-20143.10 Flangeflange: the portion of the ite
39、m being bent.3.11 Form Block Line (FBL)form block line (FBL): the line representing the intersection of the projected surfaces of the tool used for forming.See Fig. 3-3.3.12 Grid Linesgrid lines: a pattern of perpendicular lines drawn to a precise scale across the face of the drawing to validatedime
40、nsional accuracy.3.13 Hydro Processhydro process: a method of forming in which the sheet metal is formed down over a die or form block by pressureapplied through a rubber block affixed to the press ram.3.14 Inside Mold Line (IML)inside mold line (IML): the line representing the intersection of the p
41、rojected inside surfaces of a formed item. SeeFig. 3-1.3.15 Jogglejoggle: an offset displacement of material from its original plane or contour. Joggles are used to provide structuralcontinuity between two adjacent surfaces.3.16 Originaloriginal:thecurrentdesignactivitysreproducibledrawingordataset,
42、onwhichiskepttherevisionrecordrecognizedas official (ASME Y14.100).3.17 Outside Mold Line (OML)outside mold line (OML): the line representing the projected outside surfaces of a formed item. See Fig. 3-1.3.18 Principal Planeprincipal plane: the flat surface of the item that flanges are developed fro
43、m.3.19 Printed Circuit Drawingprinted circuit drawing: a drawing defining the circuitry pattern that is etched, deposited, screened, or bonded to abase material.3.20 Registration Markregistration mark: a stylized pattern (symbol) that is used as a reference point for registration (IPC-T-50).3.21 Rep
44、roductionreproduction: a copy that duplicates the original. Reproductions may be either reproducible or nonreproducible,depending on the media (MIL-PRF-5480).3.22 Templatetemplate: a tool that is a dimensionally stable full-size reproduction of an undimensioned drawing that defines theprofile of an
45、item.3.23 Tolerant Gagetolerant gage: accepts most part features that are within tolerance, rejects most part features not within tolerance,accepts a small percentage of borderline out-of-tolerance features, and rejects a small percentage of borderlinewithin-tolerance features (ASME Y14.43).3.24 Tru
46、e Geometry Viewstrue geometry views: views that show the actual shape description, and when they are section views they show theactual shape cut by the cutting plane (ASME Y14.3).4ASME Y14.31-20143.25 Undimensioned Drawingundimensioned drawing: a drawing graphic sheet that defines an item graphicall
47、y, predominantly without the useof dimensions.3.26 Validationvalidation: the process used by the producer of the template to check template accuracy.3.27 Verificationverification: the process used by the user of the template to check template accuracy.3.28 Wire Harness Drawingwire harness drawing: a
48、 drawing defining the configuration and item identification of a wire harness assembly.4 UNDIMENSIONED DRAWINGAn undimensioned drawing graphically defines the item in true geometry view(s). Dimensions may be includedto establish a defined value with a tolerance that is a refinement from the toleranc
49、e applied to the undimensionedfeatures. Items that are symmetrical shall be completely delineated. Features are presented full size, although somedrawing types may be produced to a larger or smaller scale to provide appropriate details that will be returned toactual size for production use. A method(s) to validate the accuracy of the drawing or verify the accuracy of thetemplate shall be provided. Drawings may be prepared by manual or electronic means.5 APPLICATIONSUndimensioned drawings are used for a variety of applications where the generation of templates
