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GB/T 24637.1-2020: Geometrical product specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification
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| GB/T 24637.1-2020 | English | 1039 |
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Geometrical product specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification
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GB/T 24637.1-2020
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Basic data | Standard ID | GB/T 24637.1-2020 (GB/T24637.1-2020) | | Description (Translated English) | Geometrical product specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 17.040.40 | | Word Count Estimation | 56,524 | | Date of Issue | 2020-04-28 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24637.1-2020: Geometrical product specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Geometrical product specifications (GPS)-General concepts--Part 1.Model for geometrical specification and verification
ICS 17.040.40
J04
National Standards of People's Republic of China
Replace GB /Z 24637.1-2009
Product Geometric Technical Specification (GPS) General Concept
Part 1.Models for geometric specifications and inspection
(ISO 17450-1..2011, MOD)
2020-04-28 release
2020-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Applications and future prospects 9
5 Overview 9
6 Element 10
6.1 Overview 10
6.2 Ideal elements 10
6.3 Non-ideal elements 12
6.4 Relationships between geometric element terms
7 Features 15
7.1 Overview 15
7.2 Essential characteristics of ideal elements 15
7.3 Location features between ideal elements 15
7.4 Location features between non-ideal and ideal elements 16
8 Operation 17
8.1 Element operation 17
8.2 Evaluation 21
8.3 Transformation 21
9 Specification 21
9.1 Overview 21
9.2 Dimensions 21
9.3 Regional specifications 22
9.4 Deviation 23
10 Inspection 23
Appendix A (informative appendix) About GB/T 1182 application examples 24
Appendix B (Informative Appendix) Mathematical Symbols and Definitions 35
Appendix C (informative appendix) Comparison between tolerance and measurement 44
Appendix D (Informative Appendix) Feature Concept Map 46
Appendix E (informative appendix) constant category 47
Appendix F (Informative Appendix) Relationship with GPS Matrix Model 49
Reference 50
Index 51
Foreword
GB/T 24637 "General Concept of Product Geometric Technical Specifications (GPS)" is divided into 4 parts.
--- Part 1.Geometry specification and inspection model;
--- Part 2.Basic principles, specifications, operation set and uncertainty;
--- Part 3.The measured elements;
--- Part 4.Quantification of GPS deviations of geometric features.
This part is part 1 of GB/T 24637.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB /Z 24637.1-2009 "Product Geometrical Technical Specifications (GPS) General Concept Part 1.Geometrical Specifications and
Compared with GB /Z 24637.1-2009, the main technical changes are as follows.
--- Added surface model, attribute of ideal element, size parameter, skeleton element, shape, essence, size element, linear size element,
Angle dimension element, actual element, component element, derived element, extracted element, filter element, reconstruction element, reconstruction, simplification, change
Terms such as change, change curve, etc.; delete the terms such as the constant of ideal elements, the actual surface of the workpiece, bounded elements, unbounded elements;
Changed skin model, geometric elements, ideal elements, non-ideal elements, nominal elements, fitting elements, filtering, combination, characteristics, essence
Definitions of terms such as features, deviations, and constant categories (see Chapter 3, Chapter 3 of the.2009 edition);
--- Removed the purpose of the model not directly used as a standard method for determining the geometric characteristics of the workpiece (see 4.2 in the.2009 edition);
--- Added "Relationship between Geometric Elements" (see 6.4);
--- Added "refactoring" content (see 8.1.8);
--- Added the content of "transformation" (see 8.3);
--- Revised the content of "Inspection" (see Chapter 10, Chapter 10 of the.2009 edition);
--- Added informative Appendix E "Constant Categories".
This part uses the redrafting method to modify and adopt ISO 17450-1..20111) "Geometric Technical Specifications of Products (GPS) General Concept No. 1
Part. Models for geometric specifications and inspection. "
1) The ISO 17450-1..2011 modified and adopted in this part cancels and replaces ISO 14660-1..1999 (GB/T 18780.1-2002).
The technical differences between this part and ISO 17450-1..2011 and the reasons are as follows.
--- With regard to normative quotation documents, this part has been adjusted with technical differences to adapt to my country's technical conditions and adjustments
The situation is reflected in Chapter 2 "Regulatory Reference Documents", with specific adjustments as follows.
● Replaced ISO /IEC Guide99 with JJF1001.
The following editorial changes have been made in this section.
--- Modified the error of Figure 1b), deleted the original Figure 3b).
This part is proposed and managed by the National Product Geometry Technical Standardization Technical Committee (SAC/TC240).
This section was drafted by. China Machine Productivity Promotion Center, Zhengzhou University, Hexagon Measuring Technology (Qingdao) Co., Ltd., Beijing Automotive
Co., Ltd.
The main drafters of this section. Ming Cuixin, Zhao Fengxia, Zhang Linna, Wang Huizhen, Teng Lijing, Zhu Yue.
The previous versions of the standard replaced by this part are as follows.
--- GB /Z 24637.1-2009.
Product Geometric Technical Specification (GPS) General Concept
Part 1.Models for geometric specifications and inspection
1 Scope
This part of GB/T 24637 provides a model for geometric specifications and inspection, defines the corresponding concepts, and also gives the model
The mathematical basis of related concepts defines the general terminology of the geometrical elements of the workpiece.
The purpose of this section to define the basic concepts of the GPS system is.
--- Provides clear GPS language applied in design, manufacturing, and inspection;
--- Identify elements, features and rules to provide a basis for GPS specifications;
--- Provides a complete symbolic language marked with GPS specifications;
--- Provide simplified symbols by defining default rules;
--- Provides consistent rules for inspection.
This section applies to models in product geometric specifications and inspection.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
JJF1001 General Measurement Terms and Definitions
3 Terms and definitions
The terms and definitions defined by JJF1001 and the following apply to this document.
3.1
Real surface
A set of elements that actually exist and separate the entire workpiece from the surrounding media.
3.2
Surface model
A model representing the physical limit set of virtual or actual artifacts.
Note 1.The model is applicable to all closed surfaces.
Note 2.The surface model allows the definition of single elements, feature sets and/or partial features. The entire product is modeled by a set of surface models corresponding to each workpiece.
3.2.1
Nominal model
Workpiece model with ideal shape defined by the designer.
Note. The nominal model expresses the design intent.
3.2.2
Non-ideal surface model
Skin model
The physical interface model of the workpiece and its surrounding environment.
Note. See Chapter 5.
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