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GB/T 38762.1-2020: Geometrical product specifications (GPS) - Dimensional tolerancing - Part 1: Linear sizes
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| GB/T 38762.1-2020 | English | 929 |
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Geometrical product specifications (GPS) - Dimensional tolerancing - Part 1: Linear sizes
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GB/T 38762.1-2020
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Basic data | Standard ID | GB/T 38762.1-2020 (GB/T38762.1-2020) | | Description (Translated English) | Geometrical product specifications (GPS) - Dimensional tolerancing - Part 1: Linear sizes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L55 | | Classification of International Standard | 17.040.10 | | Word Count Estimation | 50,563 | | Date of Issue | 2020-04-28 | | Date of Implementation | 2020-11-01 | | Quoted Standard | GB/T 1800.1; GB/T 4249; GB/T 16901.1; GB/T 24637.1; GB/T 24637.2-2020; GB/T 24637.3 | | Adopted Standard | ISO 14405-1-2016, MOD | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the default set of normative operations for linear dimensions (see GB/T 24637.2), and specifies the facing "cylindrical surface", "spherical surface", "torus surface", "two opposite parallel surfaces" and "two opposite parallel straight lines" A set of specific canonical operations for linear dimensions of equal-sized feature types. In addition, this standard specifies specification modifiers for linear dimensions and their pictorial representation. This standard covers the following linear dimensions: a) Local dimensions: two-point dimensions; spherical dimensions; section dimensions; section dimensions. b) Global size | GB/T 38762.1-2020: Geometrical product specifications (GPS) - Dimensional tolerancing - Part 1: Linear sizes
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Geometrical product specifications (GPS)-Dimensional tolerancing--Part 1.Linear sizes
ICS 17.040.10
L55
National Standards of People's Republic of China
Product Geometric Technical Specification (GPS) Dimensional Tolerance
Part 1.Linear dimensions
Part 1.Linearsizes
(ISO 14405-1..2016, 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 2
3 Terms and definitions 2
4 Normative modifiers and symbols 13
5 Default size specification operation set 17
6 Drawing annotation of specific size specification operation set 19
7 Labeling of measured elements with defined dimensional features 26
8 Supplement 32
Appendix A (Normative Appendix) Symbol scale and size 33
Appendix B (informative appendix) Dimensions overview Figure 34
Appendix C (informative appendix) Data processing with statistical modifiers 35
Appendix D (Normative Appendix) Dimensional Characteristics 37
Appendix E (Normative Appendix) Drawing Guidelines for the Location and Marking of Dimensional Specifications 40
Appendix F (Informative Appendix) Relationship with GPS Matrix Model 43
References 44
Foreword
GB/T 38762 "Geometric Technical Specifications (GPS) Dimensional Tolerance" is divided into 3 parts.
--- Part 1.Linear dimensions;
--- Part 2.Dimensions other than linear and angular dimensions;
--- Part 3.Angle dimensions.
This part is Part 1 of GB/T 38762.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part uses the redrafting method to modify the use of ISO 14405-1..2016 "Product Geometrical Technical Specifications (GPS) Dimensional Tolerance Section 1
Part. Linear Dimensions.
The technical differences between this part and ISO 14405-1..2016 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 286-1 with GB/T 1800.1 modified to adopt international standards;
● Replaced ISO 8015 with GB/T 4249 modified to adopt international standards;
● Replace ISO 81714-1 with GB/T 16901.1 modified to adopt international standards;
● Replaced ISO 17450-1 with GB/T 24637.1 modified to adopt international standards;
● Replaced ISO 17450-2..2012 with GB/T 24637.2-2020, which adopts international standards.
● Replaced ISO 17450-3 with GB/T 24637.3 modified to adopt international standards.
This part is proposed and managed by the National Product Geometry Technical Standardization Technical Committee (SAC/TC240).
This section was drafted by. Xi'an Jiaotong University, China Machine Productivity Promotion Center, Shanghai Automobile Group Co., Ltd., China Aviation Development Xi'an
Aero Engine Co., Ltd., Shaanxi Provincial Institute of Metrology, Zhongyuan Institute of Technology.
The main drafters of this section. Jing Weixuan, Ming Cuixin, Zhang Li, Shen Xiaojun, Liu Ying, Gao Weizhuo, Zhao Zexiang, Zhu Yue.
Product Geometric Technical Specification (GPS) Dimensional Tolerance
Part 1.Linear dimensions
1 Scope
This part of GB/T 38762 establishes the default specification set of linear dimensions (see GB/T 24637.2), and specifies the
"Linear" "spherical" "toroidal" 1) "two relatively parallel planes" and "two relatively parallel straight lines" and other types of linear elements of certain dimensions
Fan operation set. In addition, this section also specifies the normative modifiers of linear dimensions and their graphic expressions.
1) When the diameter of the guideline is fixed, the torus is the dimension element.
This section covers the following linear dimensions.
a) Local dimensions.
--- Two-point size;
--- Spherical size;
--- Cross section size;
--- Partial size.
b) Global dimensions.
--- Direct global linear dimension.
--- Least square size;
--- Maximum inscribed size;
--- Minimum external dimensions;
--- Minimum area size;
--- Indirect global linear dimension.
c) Calculated size.
--- Perimeter diameter;
--- Area diameter;
--- Volume diameter.
d) Statistical size.
---biggest size;
---smallest size;
--- average size;
--- median size;
--- Extreme average size;
---Size range;
--- Standard deviation of size.
This section defines the following linear dimensional tolerances with and without specification modifiers (see Table 1 and Table 2).
--- /-limit deviation (example 0/-0.019) (see Figure 11);
--- Upper limit size (ULS)/Lower limit size (LLS) (Example 15.2max., 12min., Or 30.2/30.181) (see Figure 13);
--- Comply with the ISO tolerance zone code (example 10h6) of GB/T 1800.1 (see Figure 12).
This section provides a set of tools that describe several types of dimensional characteristics, but does not reflect the actual workpiece functional requirements and its dimensional characteristics
Information about internal relationships.
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