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GB/T 24631.1-2024 English PDF

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GB/T 24631.1-2024: Geometrical product specifications(GPS) - Straightness - Part 1: Vocabulary and parameters of straightness
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GB/T 24631.1: Evolution and historical versions

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GB/T 24631.1-2024English359 Add to Cart 4 days [Need to translate] Geometrical product specifications(GPS) - Straightness - Part 1: Vocabulary and parameters of straightness Valid GB/T 24631.1-2024
GB/T 24631.1-2009English559 Add to Cart 3 days [Need to translate] Geometrical product specifications (GPS) -- Straightness -- Part 1: Vocabulary and parameters of straightness Obsolete GB/T 24631.1-2009

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Basic data

Standard ID GB/T 24631.1-2024 (GB/T24631.1-2024)
Description (Translated English) Geometrical product specifications(GPS) - Straightness - Part 1: Vocabulary and parameters of straightness
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 01.040.17; 17.040.20
Word Count Estimation 18,160
Date of Issue 2024-09-29
Date of Implementation 2024-09-29
Older Standard (superseded by this standard) GB/T 24631.1-2009
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 24631.1-2024: Geometrical product specifications(GPS) - Straightness - Part 1: Vocabulary and parameters of straightness


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Geometrical product specifications(GPS) - Straightness - Part 1.Vocabulary and parameters of straightness Product Geometric Specification (GPS) Straightness Part 1.Vocabulary and Parameters Geometrical product specifications (GPS)-Straightness-Part 1. Vocabulary and parameters of straightness (ISO 12780-1.2011, MOD) ICS 01.040.17;17.040.20 CCS J 04 National Standard of the People's Republic of China Replaces GB/T 24631.1-2009 Released on 2024-09-29 2024-09-29 implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... Ⅲ Introduction Ⅳ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 3.1 Basic terminology 1 3.2 Terms related to contours 1 3.3 Terms related to reference lines 2 3.4 Terms related to filter functions 4 3.5 Terms related to parameters 4 Appendix A (Informative) Mathematical definition of straightness tolerance of nominal components ... 6 Appendix B (Informative) Comparison table of terms, parameters and abbreviations ... 7 Appendix C (Informative) Relationship with GPS Matrix Model ... 9 C.1 Overview 9 C.2 Information about the standard and its use 9 C.3 Position in the GPS matrix model 9 C.4 Related standards 9 References ... 10

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting is required. This document is Part 1 of GB/T 24631 "Geometric Technical Specification for Products (GPS) Straightness". GB/T 24631 has been issued The following parts were published. Part 1.Vocabulary and parameters;- Part 2.Specification of Operation Sets. - This document replaces GB/T 24631.1-2009 "Geometric Product Specification (GPS) Straightness Part 1.Vocabulary and References" Compared with GB/T 24631.1-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. Changed the scope (see Chapter 1, Chapter 1 of the.2009 edition); - Changed the introductory words of terms and definitions (see Chapter 3, Chapter 3 of the.2009 edition); - Change “normal of the surface” to “surface normal” (see 3.1.2 of the.2009 edition); - The definition of “straightness plane” has been changed (see 3.1.3, 3.1.3 of the.2009 edition); - The definition of “actual surface of the workpiece” (see 3.2.1 of the.2009 edition) has been deleted; - Changed the definition of “straightness profile” (see 3.2.2, 3.2.3 of the.2009 edition); - The definition and symbolic representation of “local straightness deviation” have been changed (see 3.2.3, 3.2.4 of the.2009 edition); - Change “assessment baseline” to “reference straight line” (see 3.3, 3.3 of the.2009 edition); - The definition of “outer minimum area reference line” has been changed (see 3.3.1.1.1, 3.3.1.1.1 of the.2009 edition); - The definition of “inner minimum area reference straight line” has been changed (see 3.3.1.1.2, 3.3.1.1.2 of the.2009 edition); - Change “peak-to-valley straightness error” to “peak-to-valley straightness deviation” (see 3.5.1, 3.5.1 of the.2009 edition); - Change "peak-to-base straightness deviation" to "peak straightness deviation" (see 3.5.2, 3.5.2 of the.2009 edition); - Change "base-valley straightness deviation" to "valley straightness deviation" (see 3.5.3, 3.5.3 of the.2009 edition); - Change "root mean square straightness error" to "root mean square straightness deviation" (see 3.5.4, 3.5.4 of the.2009 edition). - This document is modified based on ISO 12780﹘1.2011 “Geometrical Product Specification (GPS) Straightness Part 1.Vocabulary and parameters”. The technical differences between this document and ISO 12780﹘1.2011 and their reasons are as follows. The normative references to ISO 14660﹘1 and ISO 14660﹘2 (see Chapter 3 of ISO 12780﹘1.2011) have been deleted to adapt to the The status quo has been abolished. The following editorial changes were made to this document. Added a note on “straightness” (see 3.1.1); - The reference to “extraction line” in ISO 14660﹘1 has been deleted (see the note to 3.2.1 of ISO 12780﹘1.2011); - The description of only one type of phase median filter (see Note 2 of 3.4 of ISO 12780﹘1.2011) has been deleted to accommodate the existing Current status of various filter types. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Product Geometry Technical Specifications (SAC/TC 240). This document was drafted by. China Machinery Productivity Promotion Center Co., Ltd., Huazhong University of Science and Technology, China Institute of Metrology, China Engineering Institute of Mechanical Manufacturing Technology, Institute of Physics, Shanghai Institute of Precision Metrology and Testing, Tianjin University, Zhengzhou University, Harbin Institute of Technology, Shanghai Moyuanfang Information Technology Co., Ltd., China University of Metrology, Shandong Industrial Technology Research Institute of Zhejiang University, China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd. The main drafters of this document are. Zhu Yue, Lu Wenlong, Gao Sitian, Zhao Qijian, Xiao Yinfeng, Fu Luhua, Zhao Fengxia, Huang Jingzhi, Chai Zitao, Chen Jigang, Chang Suping, Zhao Jun, and Zhang Zongzheng. This document was first published in.2009 and this is the first revision.

Introduction

Straightness is one of the common shape tolerances in product geometry specifications and is also one of the key indicators for evaluating product geometry accuracy. It is one of the essential technical elements in the modern production process. Straightness is the most basic item in geometric error and is very important for ensuring zero It plays an important role in the precise matching and motion accuracy of components, improving product reliability, and optimizing manufacturing processes. The standard can not only reduce errors and losses in the manufacturing process, but also significantly reduce the failure rate of products and extend their service life, making the products more With the development of digital measurement technology and product geometry specifications, the relevant definitions in the original standard are different from the current national GPS standards. Disproportionate, technical requirements lag behind current production needs and can no longer effectively regulate and guide the current market production situation. GB/T 24631 aims to specify the straightness specifications of component elements and consists of two parts. Part 1.Vocabulary and parameters. The purpose is to define the terms and concepts related to the straightness of single components. Part 2.Set of specification operations. The purpose is to define a complete set of specification operations for the straightness of a single component. The straightness specification must clearly define the set of standard operations to ensure its uniqueness, otherwise it will lead to standard ambiguity (see GB/T 24637.2). For example, filtering is necessary for data extraction operations, and additional filtering may or may not be used when extracting data. Mean line filtering (Gaussian filtering, spline filtering, wavelet filtering, etc.) or nonlinear filtering (such as morphological filtering), the filter type will affect the cylinder The definition of the degree and the set of standard operations therefore need to be clearly stated. This document defines the terms and concepts required for the standard operation set of single component straightness according to GB/T 24631.2. Involves specific straightness measurement methods. Product Geometric Specification (GPS) Straightness Part 1.Vocabulary and Parameters

1 Scope

This document defines the terms and concepts related to the straightness of individual components. This document applies only to the complete straightness profile of a single component. Note. The straightness of the extracted axis of the cylindrical surface is defined by ISO 12180﹘1 and ISO 12180﹘2.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document. ISO 17450﹘1 Geometrical product specifications (GPS) General concepts Part 1.Models for geometrical specifications and verification [Geo﹘ metrical product specifications (GPS)-General concepts-Part 1.Model for geometrical specifica﹘ tion and verification] Note. GB/T 24637.1-2020 Product geometry specification (GPS) General concepts Part 1.Model for geometry specification and inspection (ISO 17450﹘1.2011, MOD)

3 Terms and definitions

For the purpose of this document, the terms and definitions defined in ISO 17450﹘1 and the following apply. 3.1 Basic terminology 3.1.1 Straightness Properties of a straight line. Note. The mathematical definition of the straightness tolerance of nominal components is given in Appendix A. 3.1.2 normal of the surface Fits normals to components. 3.1.3 Straightness plane The plane that intersects the fitted elements as a straight line. Note 1.See Figure 1. NOTE 2 The straightness plane contains the surface normal. 3.2 Terms related to contours 3.2.1 Extracted line < Straightness> The intersection of the actual surface expressed numerically with the straightness plane.

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