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GB/T 4249-2018 English PDF (GB/T 4249-2009, GB/T 4249-1996)

GB/T 4249-2018_English: PDF (GB/T4249-2018)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 4249-2018English145 Add to Cart 0--9 seconds. Auto-delivery Geometrical product specifications (GPS) -- Fundamentals -- Concepts, principles and rules Valid GB/T 4249-2018
GB/T 4249-2009English399 Add to Cart 3 days [Need to translate] Geometrical product specifications (GPS) -- Tolerancing principle Obsolete GB/T 4249-2009
GB/T 4249-1996English319 Add to Cart 3 days [Need to translate] Tolerancing principle Obsolete GB/T 4249-1996
GB 4249-1984English319 Add to Cart 3 days [Need to translate] Tolerancing principles Obsolete GB 4249-1984


BASIC DATA
Standard ID GB/T 4249-2018 (GB/T4249-2018)
Description (Translated English) Geometrical product specifications (GPS) -- Fundamentals -- Concepts, principles and rules
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 01.100.20
Word Count Estimation 14,134
Date of Issue 2018-09-17
Date of Implementation 2019-04-01
Older Standard (superseded by this standard) GB/T 4249-2009
Drafting Organization China Machine Productivity Promotion Center, Zhengzhou University, Omnex (Shanghai) Consulting Co., Ltd., China Aviation Integrated Technology Research Institute, Pan Asia Automotive Technology Center Co., Ltd., Zhejiang University, Carl Zeiss (Shanghai) Management Co., Ltd., Hexagon Measurement Technology (Qingdao) Co., Ltd., Shanghai Automotive Group Co., Ltd. Technology Center, Beijing Automobile Co., Ltd., Qiaozhi Automobile Co., Ltd., Xi'an Jiaotong University, SAIC-GM-Wuling Automobile Co., Ltd., Dalian Institute of Technology
Administrative Organization National Product Geometric Technical Standardization Technical Committee (SAC/TC 240)
Proposing organization National Product Geometric Technical Standardization Technical Committee (SAC/TC 240)
Issuing agency(ies) State Administration of Markets and China National Standardization Administration

BASIC DATA
Standard ID GB/T 4249-2009 (GB/T4249-2009)
Description (Translated English) Geometrical product specifications (GPS). Tolerancing principle
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 01.100.20; 17.040.10
Word Count Estimation 10,179
Date of Issue 2009-03-16
Date of Implementation 2009-11-01
Older Standard (superseded by this standard) GB/T 4249-1996
Quoted Standard GB/T 1800.1-2009; GB/T 1182-2008; GB/T 16671-2009; GB/T 18780.1-2002; GB/T 18780.2-2003; GB/Z 20308-2006
Adopted Standard ISO 8015-1985
Drafting Organization Productivity Promotion Center in the machine
Administrative Organization National product size and geometry Technology Standardization Technical Committee Specification
Regulation (derived from) National Standard Approval Announcement 2009 No.2 (Total No.142)
Proposing organization National product dimensions and specifications Technology Standardization Technical Committee
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the principles to determine the size (linear and angular dimensions) the relationship between tolerance and geometrical tolerances. This standard applies to technical drawings and related documents in the marked size, dimensional tolerances and geometric tolerances to determine the size of parts elements, orientation and position of features, shape.

BASIC DATA
Standard ID GB/T 4249-1996 (GB/T4249-1996)
Description (Translated English) Tolerancing principle
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 17.040.10
Word Count Estimation 8,898
Date of Issue 1996/12/18
Date of Implementation 1997/7/1
Older Standard (superseded by this standard) GB 4249-1984
Quoted Standard GB/T 1182-1996; GB/T 16671-1996,
Adopted Standard ISO 8015-1985, MOD
Regulation (derived from) Announcement of Newly Approved National Standards 2009 No. (No. 142 overall) 2
Proposing organization Ministry of Machinery Industry of the People Republic of China
Issuing agency(ies) State Bureau of Technical Supervision


GB/T 4249-2018 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 01.100.20 J 04 Replacing GB/T 4249-2009 Geometrical product specifications (GPS) - Fundamentals - Concepts, principles and rules (ISO 8015:2011, MOD) ISSUED ON: SEPTEMBER 17, 2018 IMPLEMENTED ON: APRIL 01, 2019 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 5  4 Basic assumptions for reading specification on drawing ... 6  5 Basic principles ... 7  6 Marking rules for default specification operator ... 12  7 Marking rules for specific specification operator ... 14  8 Rules described in brackets ... 16  Annex A (informative) Positions in GPS matrix model ... 17  Bibliography ... 19  Foreword This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 4249-2009 “Geometrical product specifications (GPS) - Tolerancing principle”. Compared with GB/T 4249-2009, the main technical changes in this Standard are as follows: -- deleted, added some terms and definitions (see Clause 3 of this Edition, Clause 3 of Edition 2009); -- moved the content of “Independent principle” to the clause of “Fundamental principle” (see 5.5 of this Edition, Clause 4 of Edition 2009); -- deleted tolerance (see Clause 5 of Edition 2009); -- deleted relevant requirements (Clause 6 of Edition 2009); -- deleted drawing marks of tolerance principle (Clause 7 of Edition 2009); -- added basic assumptions for reading specification on drawing (see Clause 4 of this Edition); -- added basic principle (see Clause 5 of this Edition); -- added marking rules for default specification operator (see Clause 6 of this Edition); -- added marking rules for specific default specification operator (see Clause 7 of this Edition); -- added rules for expression in brackets (see Clause 8 of this Edition). This Standard uses redrafting method to modify and adopt ISO 8015:2011 “Geometrical product specifications (GPS) -- Fundamentals -- Concepts, principles and rules”. Compared with ISO 8015:2011, there are technical differences in this Standard. The terms involved in these differences have been marked by a vertical single line (-) at the margin of the outer margin. The corresponding technical differences and reasons are as follows: -- for normative references, this Standard made adjustment for specific technical differences, so as to adapt to the technical conditions of China. See Clause 2 “Normative references” for the adjustment. The specific adjustments are as follows: • used GB/Z 24637.1 that identically adopts International standard to Geometrical product specifications (GPS) - Fundamentals - Concepts, principles and rules 1 Scope This Standard specifies the fundamental concepts, principles and rules that are valid for the creation, interpretation and application of all relevant standards, technical specifications and technical documents to product dimensions, geometrical product specifications (GPS) and inspections. This Standard is applicable to the interpretation for GPS marks on all types of drawings. “Drawing” referred in this Standard is a broad concept. It includes all documents that express workpiece specifications. 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 references, the latest edition of the referenced document (including any amendments) applies. GB/Z 24637.1, Geometrical Product Specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification (GB/Z 24637.1-2009, ISO/TS 17450-1:2005, IDT) GB/Z 24637.2, Geometrical Product Specifications (GPS) - General concepts - Part 2: Basic tenets, specifications, operators and uncertainties (GB/Z 24637.2-2009, ISO/TS 17450-2:2002, IDT) ISO/IEC Guide 98-3:2008, Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995) ISO/IEC Guide 99:2007, International vocabulary of metrology - Basic and general concepts and associated terms (VIM) 3 Terms and definitions For the purposes of this document, the terms and definitions defined in GB/Z 24637.1, GB/Z 24637.2, ISO/IEC Guide 98-3:2008, ISO/IEC Guide 99:2007 as It is assumed that the interpretation for the tolerance limit is completely same with the interpretation for the functional limit. 4.4 Functional level of workpiece It is assumed that the workpiece 100% meets the function within the tolerance limit; does not meet the function outside the tolerance limit. 5 Basic principles 5.1 Principle for adoption Once it adopts one part of ISO GPS system in mechanical engineering product documents, it is equivalent to adopting the entire ISO GPS system, unless otherwise stated in the document, for example, “refer to other related documents”. “Unless otherwise stated in the document” means that if the regional, national or enterprise standards referred are marked in the document, it shall use those standards. Do not adopt ISO GPS system to interpret the normative elements specified in the standard. If it is unnecessary to adopt ISO GPS system, “noting method is according to GB/T 4249” may selectively mark within the title bar or near the title bar. NOTE 1: The most common way to adopt ISO GPS system is to use one or more GPS specifications in drawing. NOTE 2: ISO GPS system is an International standard issued by ISO/TC 213, see GB/T 20308. NOTE 3: “Adopting the entire ISO GPS system” means that unless otherwise specified, if GPS fundamental standard and GPS comprehensive standard are adopted, then the reference temperature specified in GB/T 19765-2005 and the rules for determination specified in GB/T 18779.1 shall be adopted. The purpose of “principle for adoption” is to provide formal traceability for those GPS standards and rules. 5.2 Principle for hierarchy of GPS standard ISO GPS system is hierarchical. Its standard variety, according to hierarchy, contains the following types: - GPS fundamental standard; - GPS comprehensive standard; - GPS general standard; 5.4 Key element principle One workpiece can be considered to be composed by many key elements that are limited by natural boundaries. Under the situation of default, each GPS specification of one key element applies to the entire key element. Each GPS specification that expresses the relationship between many key elements applies to many key elements. Each GPS specification is only applicable to one key element or one relationship between key elements. If it is necessary to change this default specification, it needs to clearly mark on the drawing. NOTE 1: The natural boundaries between key elements usually refer to the boundaries that sudden change happens on the surface normal. But it is not always true. If one workpiece is composed of two hemispherical elements that have same diameter and intermediate cylindrical element, in such case, the surface normal of natural boundaries between key elements does not have sudden change. NOTE 2: Some marks do not apply to the entire key element, for example, partial area of key element is marked with a long thick dotted line or is marked with ACS (any cross section). NOTE 3: Some marks apply to many key elements, for example, CZ (combined tolerance zone) is marked. NOTE 4: Unless otherwise specified, GPS general specification is considered as a series of GPS specifications. Each GPS specification is only applicable to one characteristic of key element or relationship between key elements (see 5.12). 5.5 Independence principle Under the situation of default, GPS specification of each key element or GPS specification of relationship between key elements is independent from other specifications. They shall be met respectively, unless other standards or special marks are specified in the actual product specification (for example, modifier symbol ○M in GB/T 16671, CZ in GB/T 1182 and ○E in ISO 14405-1). 5.6 Decimal point principle The numerical values after the decimal point of nominal size and tolerance value that are not indicated shall be zero. This principle is applicable to the drawing and GPS standard. Example 1: ±0.2 is equivalent to ±0.200000... Example 2: 2:10 is equivalent to 10.000000... 5.7 Default principle eliminate any ambiguity of the functional description in the specification. A complete specification operator defines every important detail to be measured for the specification. Therefore, it eliminates the ambiguity of the specification. Inspection of operation is an actual application of specification operator. When the method uncertainty is zero, inspect the sequences of operator and specification operator which shall be in one-to-one correspondence. When the method uncertainty is not zero, there are differences in two operators or the sequence of two specifications. Although the inspection operator is not marked in the drawing, it shall get close to the specification operator during the inspection process, so as to ensure the method uncertainty within the allowable range. 5.10.2 Description of duality principle The duality principle points out: a) the GPS specification operator that is specified by GPS specification is irrelevant to any measuring procedures or measuring instruments; b) the inspection operator that is to realize GPS specification operator is irrelevant to the GPS specification itself; but the relationship between it and GPS specification operator is mirror correspondence. GPS specification does not specify which kind of inspection operator is acceptable. Whether the operator is acceptable or not is inspected by measuring the uncertainty and specification uncertainty. 5.11 Function control principle The function of each workpiece is described by function operator. It can be simulated by a series of specification operators. These specification operators once again define a series of measuring and relevant tolerances. When all functional requirements of workpiece have been clearly described and controlled by GPS specification, such specification is complete. In most cases, since some functions are described / controlled imperfectly, the specification might be incomplete. Therefore, the correlation between function and a series of GPS specifications may be superior or inferior. Any correlation deficiency between any functional requirements and GPS specification shall cause the uncertainty of function description. 5.12 General specification principle For each characteristic that has same type and the relationship between each When the actual specification of any geometric characteristic in the drawing is ISO basic GPS specification that is marked according to GB/T 1182, GB/T 131- 2006, GB/T 17851, and when in or near title bar, altered default general GPS specification is not marked, then ISO default specification operator is required by a current ISO standard that defines corresponding default specification operator. When establishing drawing, the ISO standard that specifies corresponding default specification operator shall be the latest version. If other earlier versions of ISO standard are required to use, it shall be indicated clearly. NOTE: At present, ISO GPS standard does not give default provisions on all specification operations in all specification operators, so some ISO default specification operators are incomplete. 6.3 Altered default GPS specification One altered default specification operator shall be defined in relevant document. As a part of a complete specification operator, altered default specification operator shall be rigorously, clearly and completely defined. Altered default specification operator shall be marked in or near title bar of drawing. When non-ISO GPS standard is applied, it shall at least mark the following information: - indicate “marking method” or “marking method is according to GB/T 4249”; - symbol ; - complete identifier of relevant document and other necessary information (such as date of release). NOTE: AD represents “altered default”. If altered default specification operator in drawing is more than one, a number is needed to add after each symbol. Some ISO standards provide to adopt altered ISO default mode, for example “Size ISO 14405 ”. symbol only applies to non-ISO GPS standard. defined in default specification operator. NOTE 1: The type of the added supplementary information (requirements) shall be defined by specification modifier (see GB/Z 24637.2). According to ISO basic specification, in the marked specific specification operator, the operator that is not specified by the supplementary provisions shall be still defined by default specification. NOTE 2: At present, ISO GPS standard does not give default provisions on all specification operations in all specification operators, so some ISO basic specifications are incomplete. The contents specified in 7.2 shall be applied to the marks of the following two specific specification operators: - testing key elements that are comply with GB/T 1182, GB/T 131-2006, GB/T 17851 respectively; - unique default specification of drawing. 7.2 Additional supplementary information (requirements) of ISO basic specification When necessary, the additional supplementary information (requirements) of ISO basic specification can change the default operation of ISO basic specification, for example: a) fitting rule; b) filter type; c) transmission band; d) probe tip; e) extraction condition. When these default specifications are changed for specific design needs, ISO basic specification shall use the following modes to modify: - for GB/T 1182, add information to the second block of the tolerance marking box; - for GB/T 131-2006, add information in a~e areas of graphic symbol that the surface structure is complete; - for ISO 14405-1, add modifier to tolerance mark. See corresponding standards for details. ......


GB/T 4249-2009 Geometrical product specifications (GPS). Tolerancing principle ICS 01.100.20; 17.040.10 J04 National Standards of People's Republic of China Replacing GB/T 4249-1996 Geometrical product specifications (GPS) Tolerance Principle (ISO 8015. 1985, Technicaldrawings- Fundamentaltolerancingprinciple, MOD) Posted 2009-03-16 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Foreword This revised standard adopts ISO 8015. 1985 "Mechanical Drawing basic principles of tolerance", in addition to increasing the terms and definitions in the text structure In addition, with the ISO 8015. 1985 corresponds exactly to the basic content but also with ISO 8015. 1985 agreement. ISO GPS consistent with the standard system, into Line some modifications as follows. --- The standard name be bootable elements. Geometrical product specifications (GPS); --- Definition section adds a new concept of the current GPS standards; --- Added Appendix A "position in the GPS matrix model." For ease of use, this standard of ISO 8015. 1985 also made the following editorial changes. --- "This International Standard" be replaced by "this standard"; --- Remove the ISO 8015. 1985 Foreword. This standard replaces GB/T 4249-1996 "tolerance principle", compared with the 1996 version, in addition to the above changes, the main changes are. --- The "shape and position tolerances" to "geometric tolerances"; --- Increased in Chapter 3, the terms and definitions given entity boundary maximum and minimum entity boundary, inclusive definition of requirements; --- Chapter 4 to Chapter 5, which will be described in the relevant section to do the appropriate changes and additions; --- Chapter 5 Chapter 6 to simplify the maximum material requirement, the minimum physical demand and reversible demand content; --- Deleted Appendix A (informative annex) "zero geometric tolerance." Appendix A of this standard is an informative annex. This standard GPS location system in Appendix A. The standard dimensions and geometry by the National Technical Committee of Standardization Technical specifications and centralized. This standard was drafted. the machine Productivity Promotion Center, Xi'an Jiaotong University, Zhengzhou University and Zhongyuan University of Technology. The main drafters of this standard. Lixiao Pei, Zhao Zhuoxian, Zhang Linna, Zhao Zexiang, Jing Wei Xuan, Zhaofeng Xia. This standard replaces the standards previously issued as follows. --- GB 4249-1984, GB/T 4249-1996. Geometrical product specifications (GPS) Tolerance Principle 1 Scope This standard specifies the principles to determine the size (linear and angular dimensions) the relationship between tolerance and geometrical tolerances. This standard applies to technical drawings and related documents marked size, dimensional tolerances and geometric tolerances, in order to determine the elements of large parts Size, shape, orientation, and location features. 2 Normative references The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Part 1 (GPS) Limits and fits GB/T 1800.1-2009 Geometrical product specifications. tolerances, deviations and fits the base Basis (ISO 286-1. 1988, MOD) GB/T 1182-2008 Geometrical product specifications (GPS) geometric tolerances of form, orientation, location and runout tolerancing (ISO 1101.2004, IDT) GB/T 16671-2009 Geometrical product specifications (GPS) Geometrical tolerancing - Maximum material requirement, the minimum physical demand and reversible Requirements (ISO 2692.2006, MOD) GB/T 18780.1-2002 Geometrical product specifications (GPS) - Geometrical features - Part 1. Basic terms and definitions (ISO 14660-1.1999, IDT) GB/T 18780.2-2003 Geometrical product specifications (GPS) - Geometrical features - Part 2. cylindrical and conical face lift Take the center line, parallel to the plane of the central surface extraction, extract the local feature size (ISO 14660-2.1999, IDT) GB /Z20308-2006 Geometrical product specifications (GPS) Master Plan (ISO /T R14638.1995, MOD) 3 Terms and Definitions GB/T 1800.1-2009, GB/T 16671-2009, GB/T 18780.1-2002, to GB/T 18780.2-2003 established And the following terms and definitions apply to this standard. 3.1 By a certain size of linear or angular dimensions to determine the size of the geometry. [GB/T 18780.1-2002 in 2.2] 3.2 Composed in part by elements close to the actual (composition) elements defined by the actual surface of the workpiece. [GB/T 18780.1-2002 2.4.1] 3.3 According to the method prescribed by the actual (composition) feature extraction actual number of priority points formed (composition) close substitutes elements. [GB/T 18780.1-2002 2.5] ......

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