1、BRITISH STANDARD BS EN ISO 8062-3:2007 Geometrical product specifications (GPS) Dimensional and geometrical tolerances for moulded parts Part 3: General dimensional and geometrical tolerances and machining allowances for castings ICS 01.040.17; 01.040.77; 17.040.10; 77.140.80 Incorporating corrigend
2、um January 2009National foreword This British Standard is the UK implementation of EN ISO 8062-3:2007. It is identical with ISO 8062-3:2007, incorporating corrigendum January 2009. Together with BS EN ISO 8062-1:2007 and DD ISO TS 8062-2 (when published), it supersedes BS 6615:1996 (ISO 8062:1994).
3、ISO/DTS 8062-2, Dimensional and geometrical tolerances for moulded parts Part 2: Rules is currently in development and will complete the set of ISO 8062 documents when it is published as a Technical Specification. The start and finish of text introduced or altered by corrigendum is indicated in the
4、text by tags. Text altered by ISO corrigendum January 2009 is indicated in the text by . The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical product realization (TPR). A list of organizations represented on this committee can be obtained on request to its se
5、cretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN ISO 8062-3:2007 This British Standard was published under the a
6、uthority of the Standards Policy and Strategy Committee on 31 October 2007 BSI 2010 Amendments/corrigenda issued since publication Date Comments 31 January 2010 Implementation of ISO corrigendum January 2009 ISBN 978 0 580 67443 3EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO80623 June2007 ICS
7、17.040.10 EnglishVersion GeometricalProductSpecifications(GPS)Dimensionaland geometricaltolerancesformouldedpartsPart3:General dimensionalandgeometricaltolerancesandmachining allowancesforcastings(ISO80623:2007) Spcificationgomtriquedesproduits(GPS)Tolrances dimensionnellesetgomtriquesdespicesmoules
8、 Partie3:Tolrancesdimensionnellesetgomtriques gnralesetsurpaisseursdusinagepourlespices moules(ISO80623:2007) GeometrischeProduktspezifikation(GPS)Ma,Form undLagetoleranzenfrFormteileTeil3:AllgemeineMa, FormundLagetoleranzenundBearbeitungszugabenfr Gussstcke(ISO80623:2007) ThisEuropeanStandardwasapp
9、rovedbyCENon25February2007. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationto
10、theCENManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCENManagementCentrehasthesamestatusas the officialversions. CENmembersaret
11、henationalstandardsbodiesofAustria,Belgium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,P ortugal, Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOM
12、MITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2007CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO80623:2007:E Foreword This document (EN ISO 8062-3:2007) has been
13、prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Committee CEN/TC 190 “Foundry technology“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard
14、, either by publication of an identical text or by endorsement, at the latest by December 2007, and conflicting national standards shall be withdrawn at the latest by December 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
15、 bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swede
16、n, Switzerland and United Kingdom. Endorsement notice The text of ISO 8062-3:2007 has been approved by CEN as EN ISO 8062-3:2007 without any modifications. BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E)iii Contents Page Introduction . iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2
17、 4 Abbreviated terms 2 5 Tolerance grades 3 5.1 General. 3 5.2 Dimensional casting tolerance grades (DCTG) . 3 5.3 Geometrical casting tolerance grades (GCTG) 4 6 Surface mismatch (SMI) . 7 7 Wall thickness . 7 8 Required machining allowances (RMA) .7 8.1 General. 7 8.2 Required machining allowance
18、grades (RMAG) 8 9 Indication on drawings. 8 9.1 Indication of general dimensional casting tolerances 8 9.2 Indication of required machining allowances 9 9.3 Indication of geometrical casting tolerances 9 10 Rejection 10 Annex A (informative) Casting tolerances and geometrical tolerances . 11 Annex B
19、 (informative) Required machining allowance grades (RMAG). 14 Annex C (informative) Concept of general tolerancing of characteristics . 15 Annex D (informative) Datums for general geometrical tolerances 17 Annex E (informative) Application of general geometrical tolerances for castings . 21 Annex F
20、(informative) Relation to the GPS matrix model 29 Bibliography . 30 BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E)Introduction This part of ISO 8062 is a geometrical product specification (GPS) standard and is to be regarded as a complementary process-specific tolerance standard (see ISO/TR 14638). It
21、influences chain link 2 of the chain of standards on mouldings. For more detailed information about the relation of this part of ISO 8062 to other standards and the GPS matrix model, see Annex F. This part of ISO 8062 defines a system of tolerance grades and machining allowance grades for cast metal
22、s and their alloys. The specified system applies if the manufacturer provides a pattern or die equipment, or accepts responsibility for proving it. The tolerances specified for a casting may determine the casting method. It is therefore recommended, before the design or the order is finalized, that
23、the customer liaise with the foundry to discuss: a) the proposed casting design and accuracy required; b) machining requirements; c) the method of casting; d) the location of the parting surfaces and the necessary draft angles; e) the number of castings to be manufactured; f) the casting equipment i
24、nvolved; g) the consequences of the wear-out of the equipment during its life cycle; h) the datum system in accordance with ISO 5459; i) the casting alloy; j) any special requirements, e.g. individual dimensional and geometrical tolerances, fillet radii, tolerances and individual machining allowance
25、s; NOTE Because the dimensional and geometrical accuracy of a casting is related to production factors, tolerance grades which can be achieved for various methods and metals are described in Annex A. k) dimensional tolerances for long series and mass production, where development, adjustment and mai
26、ntenance of casting equipment make it possible to achieve close tolerances; l) dimensional tolerances for short series and single production; m) geometrical tolerances. Information on typical required machining allowance grades is given in Annex B. BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E) iv1 Geo
27、metrical product specifications (GPS) Dimensional and geometrical tolerances for moulded parts Part 3: General dimensional and geometrical tolerances and machining allowances for castings 1 Scope This part of ISO 8062 specifies general dimensional and geometrical tolerances, as well as machining all
28、owance grades, for castings as delivered to the purchaser in accordance with ISO 8062-2. It is applicable for the tolerancing of dimensions and geometry, and required machining allowance of castings in all cast metals and their alloys produced by various casting manufacturing processes. This part of
29、 ISO 8062 applies to both general dimensional and general geometrical tolerances (referred to in or near the title block of the drawing), unless otherwise specified, and where specifically referred to on the drawing by one of the references in Clause 9. The dimensional tolerances covered by this par
30、t of ISO 8062 are tolerances for linear dimensions. The geometrical tolerances covered by this part of ISO 8062 are: tolerances for straightness, flatness, roundness, parallelism, perpendicularity, symmetry, and coaxiality. This part of ISO 8062 can be used for the selection of tolerance values for
31、individual indications. NOTE This part of ISO 8062 does not apply to 3D CAD models used without indicated dimensions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re
32、ferences, the latest edition of the referenced document (including any amendments) applies. ISO 286-1:1988, ISO system of limits and fits Part 1: Bases of tolerances, deviations and fits ISO 1101:2004, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation,
33、location and run-out BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E)2 ISO 1302:2002, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation ISO 5459: 1) , Geometrical product specifications (GPS) Geometrical tolerancing Datums and datum- systems ISO 806
34、2-1:2007, Geometrical product specifications (GPS) Dimensional and geometrical tolerances for moulded parts Part 1: Vocabulary ISO/TS 8062-2: 2) , Geometrical product specifications (GPS) Dimensional and geometrical tolerances for moulded parts Part 2: Rules ISO 10579:1993, Technical drawings Dimens
35、ioning and tolerancing Non-rigid parts ISO 14405: , Geometrical product specifications (GPS) Dimensional tolerancing Linear sizes 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8062-1, ISO 1101 and ISO 5459 apply. 4 Abbreviated terms Abbreviated ter
36、ms are given in Table 1. Table 1 Abbreviated terms Abbreviated term Interpretation Reference DCT Dimensional casting tolerance 5.2 DCTG Dimensional casting tolerance grade 5.2 GCT Geometrical casting tolerance 5.3 GCTG Geometrical casting tolerance grade 5.3 RMA Required machining allowance Clause 8
37、 RMAG Required machining allowance grade Clause 8 TP Taper + ISO 10135 TM Taper - ISO 10135 SMI Surface mismatch ISO 10135 1) To be published. Revision of ISO 5459:1981. 2) To be published. Revision of ISO 8062:1994. ) To be published. 3) 3 Text deleted ISO 10135:2007, Geometrical product specificat
38、ions (GPS) Drawing indications for moulded parts in technicalproduct documentation (TPD) BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E)3 5 Tolerance grades 5.1 General Individual dimensional and geometrical tolerances shall be indicated in accordance with the relevant GPS standards on dimensional and g
39、eometrical tolerancing. If using general tolerances, the necessity of smaller tolerances (for functional reasons) or of larger tolerances (for economical reasons) needs to be ascertained (see Annex C). In both cases, individual tolerances shall be indicated. For drawings where the tolerances in acco
40、rdance with this part of ISO 8062 only apply under specified, restricted conditions, ISO 10579 shall be referred to on the drawing. 5.2 Dimensional casting tolerance grades (DCTG) Sixteen linear dimensional casting tolerance grades are defined and designated as DCTG 1 to DCTG 16 (see Table 2). NOTE
41、1 For wall thicknesses, see Clause 7. Table 2 Linear dimensional casting tolerances (DCT) Dimensions in millimetres Linear dimensional tolerance for dimensional casting tolerance grade (DCTG) aNominal dimensions related to the moulded part DCTG 1 DCTG 2 DCTG 3 DCTG 4 DCTG 5 DCTG 6 DCTG 7 DCTG 8 DCTG
42、 9 DCTG 10 DCTG 11 DCTG 12 DCTG 13 DCTG 14 DCTG 15 DCTG 16 b 10 16 u 10 u 16 u 25 0,09 0,1 0,11 0,13 0,14 0,15 0,18 0,2 0,22 0,26 0,28 0,3 0,36 0,38 0,42 0,52 0,54 0,58 0,74 0,78 0,82 1 1,1 1,2 1,5 1,6 1,7 2 2,2 2,4 2,8 3 3,2 4,2 4,4 4,6 6 8 10 12 25 40 63 u 40 u 63 u 100 0,12 0,13 0,14 0,17 0,18 0,
43、2 0,24 0,26 0,28 0,32 0,36 0,4 0,46 0,5 0,56 0,64 0,7 0,78 0,9 1 1,1 1,3 1,4 1,6 1,8 2 2,2 2,6 2,8 3,2 3,6 4 4,4 5 5,6 6 7 8 9 9 10 11 11 12 14 14 16 18 100 160 250 u 160 u 250 u 400 0,15 0,22 0,24 0,3 0,34 0,4 0,44 0,5 0,56 0,62 0,7 0,78 0,88 1 1,1 1,2 1,4 1,6 1,8 2 2,2 2,5 2,8 3,2 3,6 4 4,4 5 5,6
44、6,2 7 8 9 10 11 12 12 14 16 16 18 20 20 22 25 400 630 1 000 u 630 u 1 000 u 1 600 0,64 0,9 1 1,2 1,4 1,6 1,8 2 2,2 2,6 2,8 3,2 3,6 4 4,6 5 6 7 7 8 9 10 11 13 14 16 18 18 20 23 22 25 29 28 32 37 1 600 2 500 4 000 6 300 u 2 500 u 4 000 u 6 300 u 10 000 2,6 3,8 4,4 5,4 6,2 7 8 9 10 11 10 12 14 16 15 17
45、 20 23 21 24 28 32 26 30 35 40 33 38 44 50 42 49 56 64 aFor wall thicknesses in grades DCTG 1 to DCTG 15, one grade coarser applies (see Clause 7). bGrade DCTG 16 exists only for wall thicknesses of castings generally specified to DCTG 15. NOTE 2 Annex A gives recommendations for the application of
46、the above tolerance grades. As the default conditions for the dimensions, the casting tolerance shall be symmetrically disposed with respect to the nominal dimension, i.e. with one half on the positive side and one half on the negative side. BS EN ISO 8062-3:2007 EN ISO 8062-3:2007(E)4 If agreed bet
47、ween manufacturer and purchaser for specific reasons, the casting tolerance may be asymmetric. In such cases, the casting tolerance shall be stated individually, in accordance with ISO 286-1 and ISO 14405, following the nominal dimensions of the final moulded part. NOTE 3 In pressure die casting, an
48、 asymmetric tolerance disposition is often applied because of special technical reasons. 5.3 Geometrical casting tolerance grades (GCTG) 5.3.1 General Seven geometrical casting tolerance grades (GCTG) are defined and designated as GCTG 2 to GCTG 8 (see Tables 3 to 6). NOTE 1 GCT values are not given for grade GCTG 1. This grade is reser
