GB/T 38761-2020 English PDF

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GB/T 38761-2020: Geometrical product specifications (GPS) - Characteristics and conditions - Definitions
Status: Valid

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GB/T 38761-2020	999	Add to Cart	7 days	Geometrical product specifications (GPS) - Characteristics and conditions - Definitions	Valid

Similar standards

GB/T 38896   GB/T 38898   GB/T 38894   GB/T 19799.3   GB/T 38760   

Basic data

Standard ID: GB/T 38761-2020 (GB/T38761-2020)
Description (Translated English): Geometrical product specifications (GPS) - Characteristics and conditions - Definitions
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 17.040.30
Word Count Estimation: 54,569
Date of Issue: 2020-04-28
Date of Implementation: 2020-11-01
Quoted Standard: GB/T 3358.1; GB/T 3358.2; GB/T 24637.1; GB/T 24637.2; GB/T 38760
Adopted Standard: ISO 25378-2011, MOD
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies general terms concerning geometric specifications, features and conditions. These definitions are based on the concepts in GB/T 24637.1 and GB/T 38760, and the mathematical description in Appendix B of GB/T 24637.1-2020. This standard is not only applicable to the field of industrial applications, but can be used as a "roadmap" for understanding and planning the requirements of geometric characteristics, thereby enabling industry and software manufacturers to unify in standardization. This standard specifies the basic types of geometric features and conditions, these descriptions apply to the following situations: a workpiece; an assembly; a batch of workpieces; a batch of assemblies. These definitions are based on the concept and duality principle of operation sets in GB/T 24637.1 and GB/T 24637.2, and by GB/T 24637.2

GB/T 38761-2020: Geometrical product specifications (GPS) - Characteristics and conditions - Definitions

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Geometrical product specifications (GPS)-Characteristics and conditions--Definitions ICS 17.040.30 J04 National Standards of People's Republic of China Product Geometric Technical Specification (GPS) Definition of characteristics and conditions (ISO 25378..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 3.1 Geometry specification 1 3.2 Condition 2 3.3 Geometric features 2 3.4 Statistics 3 3.5 Calculation characteristics 4 3.6 Compound feature 4 3.7 Geometric characteristic value 4 3.8 Basic characteristics 6 3.9 GPS features 7 4 Overview 11 4.1 General normative principles 11 4.2 General characteristics principle 11 5 Description of GPS features 12 5.1 Overview 12 5.2 Single and related features 12 5.3 Local and global features 15 5.4 Deviation elements and reference elements 15 5.5 Independent features 16 5.6 Regional characteristics 23 5.7 Metrological characteristics 26 5.8 Assembly or subassembly features 31 6 Relations between characteristic terms 36 Appendix A (informative appendix) Overview Figure 38 Appendix B (Normative) Basic (geometric) characteristics 41 Appendix C (Informative Appendix) Relationship with GPS Matrix Model 48 References 49

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the redrafting method to modify and adopt ISO 25378..2011 "Product Geometrical Technical Specifications (GPS) Features and Conditions Definition". There are technical differences between this standard and ISO 25378..2011.The corresponding technical differences and their causes are as follows. --- With regard to normative quotation documents, this standard 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. ● Replace ISO 3534-1..2006 with GB/T 3358.1 equivalent to international standards; ● Replace ISO 3534-2 with GB/T 3358.2 equivalent to international standards; ● Replace ISO 17450-1..2011 with GB/T 24637.1 modified to adopt international standards; ● Replace ISO 17450-2 with GB/T 24637.2 modified to adopt international standards; ● Replace ISO 22432 with GB/T 38760 modified to adopt international standards. This standard is proposed and managed by the National Product Geometry Technical Standardization Technical Committee (SAC/TC240). This standard was drafted by. China Machine Productivity Promotion Center, Beijing Times Zhifeng Technology Co., Ltd., Zhengzhou Enpute Technology Co., Ltd. Division, Shandong Road is the first Intelligent Technology Co., Ltd., Guanzhi Automobile Co., Ltd., Xi'an Jiaotong University. The main drafters of this standard. Ming Cuixin, Li Junwei, Hao Jianguo, Qiu Chenxi, Jing Weixuan, Zhang Linna, Lang Yanmei, Zhu Yue. Product Geometric Technical Specification (GPS) Definition of characteristics and conditions

1 Scope

This standard defines general terms regarding geometric specifications, features and conditions. These definitions are based on GB/T 24637.1 and The concepts in GB/T 38760 and the mathematical description in Appendix B of GB/T 24637.1-2020. This standard is not only applicable to industrial applications, but can also be used as a "road map" for understanding and planning geometric features, thus making Industry and software manufacturers are unified in standardization. This standard defines the basic types of geometric features and conditions, and these descriptions apply to the following situations. --- a workpiece; --- an assembly; --- A batch of workpieces; --- A batch of assembly parts. These definitions are based on the concept and duality principle of the operation set in GB/T 24637.1 and GB/T 24637.2, and by The description of the type of geometric features in GB/T 38760. Conceptually, these canonical operations can be used as canonical operation sets or check operation sets (the principle of duality). This standard is not intended to define GPS specifications, symbols or other types of expressions.

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. GB/T 3358.1 Statistics vocabulary and symbols Part 1.General statistical terms and terms used in probability (GB/T 3358.1- 2009, ISO 3534-1..2006, IDT) GB/T 3358.2 Statistics Vocabulary and Symbols Part 2.Application Statistics (GB/T 3358.2-2009, ISO 3534-2..2006, IDT) GB/T 24637.1 Geometrical Product Specification (GPS) General Concept Part 1.Geometric Specification and Inspection Model (GB/T 24637.1-2020, ISO 17450-1..2011, MOD) GB/T 24637.2 Product Geometric Technical Specifications (GPS) General Concept Part 2.Basic Principles, Specifications, Operation Sets and Inaccuracy Rating (GB/T 24637.2-2020, ISO 17450-2..2012, MOD) GB/T 38760 Product Geometric Technical Specification (GPS) specifications and elements used in inspection (GB/T 38760-2020, ISO 22432..2011, MOD)

3 Terms and definitions

The terms and definitions defined in GB/T 3358.1, GB/T 3358.2 and GB/T 24637.1 and the following apply to this document. 3.1 Geometrical specification A set of one or more conditions specified on one or more geometric features. ......

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