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GB/T 24632.2-2024 English PDF

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GB/T 24632.2-2024: Geometrical product specifications(GPS) - Roundness - Part 2: Specification operators
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GB/T 24632.2: Evolution and historical versions

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GB/T 24632.2-2024English274 Add to Cart 3 days [Need to translate] Geometrical product specifications(GPS) - Roundness - Part 2: Specification operators Valid GB/T 24632.2-2024
GB/T 24632.2-2009English439 Add to Cart 3 days [Need to translate] Geometrical product specifications (GPS) -- Roundness -- Part 2: Specification operators Obsolete GB/T 24632.2-2009

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Basic data

Standard ID GB/T 24632.2-2024 (GB/T24632.2-2024)
Description (Translated English) Geometrical product specifications(GPS) - Roundness - Part 2: Specification operators
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 17.040.20
Word Count Estimation 14,182
Date of Issue 2024-09-29
Date of Implementation 2024-09-29
Older Standard (superseded by this standard) GB/T 24632.2-2009
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 24632.2-2024: Geometrical product specifications(GPS) - Roundness - Part 2: Specification operators


---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) - Roundness - Part 2.Specification operators Geometric Product Specification (GPS) Roundness Part 2.Specification of Operation Sets Geometrical product specifications (GPS)-Roundness-Part 2： Specification operators (ISO 12181-2.2011, IDT) ICS 17.040.20 CCS J 04 National Standard of the People's Republic of China Replaces GB/T 24632.2-2009 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 4 Complete Specification Operation Set ... 2 4.1 Overview ... 2 4.2 Conveyor belt ... 2 4.3 Detection system ... 4 5.Conformity with specifications ... 4 Appendix A (Informative) Harmonic components of nominal circular workpieces 5 A.1 Harmonic components 5 A.2 Aliasing and Nyquist Criterion 5 Appendix B (Informative) Relationship with GPS Matrix Model ... 7 B.1 Overview 7 B.2 Information about the standard and its use 7 B.3 Position in the GPS matrix model 7 B.4 Related standards 7 References ... 8

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 2 of GB/T 24632 "Product Geometric Technical Specification (GPS) Roundness". GB/T 24632 has been published The following parts. Part 1.Vocabulary and parameters;- Part 2.Specification of Operation Sets. - This document replaces GB/T 24632.2-2009 "Product Geometric Technical Specification (GPS) Roundness Part 2.Specification Operation Compared with GB/T 24632.2-2009, the main technical changes are as follows. Changed the scope (see Chapter 1, Chapter 1 of the.2009 edition); a) Change “GB/T 24632.1 and GB /Z 24637.2” to “ISO 12181﹘1 and ISO 17450﹘2” (see Chapter 3,.2009 Edition) Chapter 3); b) Change "stylus tip" to "stylus tip" (see Chapter 4, Chapter 4 of the.2009 edition); c) The expression of “measurement force” has been changed (see 4.3.3, 4.3.3 of the.2009 edition); d) Changed the content consistent with the specification (see Chapter 5, Chapter 5 of the.2009 edition). e) This document is equivalent to ISO 12181﹘2.2011 "Geometrical Product Specification (GPS) Roundness Part 2.Set of Specification Operations". 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. Harbin Institute of Technology, Xiamen University of Technology, Shandong Industrial Technology Research Institute of Zhejiang University, China Metrology Science Research Institute, China Machinery Productivity Promotion Center Co., Ltd., China Aviation Industry Corporation Beijing Great Wall Metrology and Testing Technology Research Institute, Huazhong Science and Technology University of Science and Technology, China University of Metrology, Ningbo Institute of Metrology and Testing (Ningbo New Materials Inspection and Testing Center), AMETEK Trading (Shanghai) Co., Ltd., Shanghai Moyuanfang Information Technology Co., Ltd., and China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd. The main drafters of this document are. Tan Jiubin, Huang Haipeng, Huang Jingzhi, Zhang Zongzheng, Xue Zi, Zhu Yue, Sun Yujiu, Lu Wenlong, Liu Wei, Xia Tianhao, Zhang Tong, Chai Zitao. This document was first published in.2009 and this is the first revision.

Introduction

Roundness is one of the important shape tolerances in product geometry specifications and is also a key technology for evaluating the geometric shape accuracy of rotating body products. As one of the most basic geometric errors, roundness is of great importance in ensuring the geometric accuracy of rotating parts and improving the manufacturing precision of products. The scientific and advanced roundness specification can not only reduce the manufacturing process, but also improve the roundness, working performance and reliability. The error in the rotation can improve the working performance of the rotating body products, and can also significantly reduce the failure rate of the rotating body products and extend their service life. With the development of digital measurement technology and product geometry specifications, the relevant definitions in the original standard are different from those in the current national The GPS standard is not commensurate, and the technical requirements lag behind the current production needs, and cannot effectively regulate and guide the current market production situation. It can better standardize and guide product geometric elements, provide technical support for enterprises in the design, manufacturing, inspection and other processes, and lead my country's high-end The development of equipment manufacturing industry. GB/T 24632 aims to specify the roundness specification of a single component and consists of two parts. Part 1.Vocabulary and parameters. The purpose is to define the terms and concepts related to the roundness of single components. Part 2.Set of specification operations. The purpose is to define a complete set of specification operations for the roundness of a single component. This document does not specify a default filter cut-off frequency, stylus tip radius (the stylus tip itself has A certain shape and size, which plays a mechanical filtering role in the measurement, so the probe tip is sometimes also called the probe contact) and related methods (reference circle), which means that the roundness specification must clearly specify the operating value to ensure its uniqueness. , the specification is ambiguous and the supplier can use any value in this operation to provide proof of conformity. Filtering is necessary for data extraction operations. When extracting data, additional filtering may or may not be used. It can be a mean linear filter (Gaussian filter, spline filter, wavelet filter, etc.) or a nonlinear filter (such as morphological filter). The filter type will be This affects the definition of circularity as well as the set of specification operations and therefore needs to be clearly stated. NOTE 1 Stylus filtering alone is not sufficient to smooth the profile. In some cases, it may give erroneous values due to the generation of spurious high frequency components. To correct this problem, To solve this problem, a long-wave filter can be used. The most advanced filter at present is the Gaussian filter, but it also has some defects, such as distortion and non-conformity. Some roughness features may be eliminated, and some waviness features may be distorted instead of being transmitted correctly. To better solve these problems, ISO internal New types of filters are being developed. Note 2.For a given cut-off length, if the probe tip radius is smaller than the specified value, the measured value will usually be larger, but this can generally be ignored; if the probe tip radius is smaller than the specified value, the measured value will usually be larger, but this can generally be ignored. For radii larger than the specified value, the measured value will generally decrease. The amount of change in the measured value depends greatly on the surface being measured. Note 3.In order to eliminate the influence of elastic deformation of the workpiece in the standard operation set, the standard measuring force is selected as 0 N, and for metal surfaces with sufficient thickness, the measuring force is The impact of physical strength can generally be ignored. Note 4.In the circularity direction, the high-order harmonic components of the skin surface model cause aliasing and other problems in the extraction process (see Appendix A), which may cause the specification Uncertainty. This document specifies the standard operation set for the roundness of a single component in accordance with GB/T 24637.2 and does not involve specific roundness measurement methods. Geometric Product Specification (GPS) Roundness Part 2.Specification of Operation Sets

1 Scope

This document specifies a complete set of specification operations for the roundness of a single component. This document applies only to the complete roundness profile of a single component.

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 12181﹘1 Geometrical product specifications (GPS) Roundness Part 1.Vocabulary and parameters Note. GB/T 24632.1-2024 Product Geometry Technical Specification (GPS) Roundness Part 1.Vocabulary and Parameters (ISO 12181﹘1.2011, MOD) ISO 14253﹘1 Geometrical Product Specifications (GPS) Measurement and inspection of workpieces and measuring equipment Part 1.Verification to specifications Rules for judging whether a product is qualified or not [Geometrical product specifications (GPS)-Inspection by measurement of workpieces and measuring equipment-Part 1：Decision rules for verifying conformity or nonconform﹘ ity with specifications] Note. GB/T 18779.1-2022 Technical Specification for Product Geometry (GPS) Measurement and Inspection of Workpieces and Measuring Equipment Part 1.Verification of Conformity to Specifications Rules for determining whether a product is qualified or unqualified (ISO 14253﹘1.2017, IDT) ISO 16610﹘211) Product Geometry Specification (GPS) Filtering Part 21.Linear Profile Filters Gaussian Filters [Geometrical product specifications (GPS)-Filtration-Part 21.Linear profile filters. Gaussian fil﹘ ters] Note. GB/T 26958.21-2020 Product Geometry Technical Specification (GPS) Filtering Part 21.Linear Profile Filter Gaussian Filter (ISO 16610﹘21：2011, IDT） ISO 17450﹘2 Geometrical product specifications (GPS) General concepts Part 2.Basic principles, specifications, operational sets and non- Degree of certainty [Geometrical product specifications (GPS)-General concepts-Part 2.Basic tenets, specifica﹘ tions, operators and uncertainties] Note. GB/T 24637.2-2020 Technical Specification for Product Geometry (GPS) General Concepts Part 2.Basic Principles, Specifications, Operation Sets and Uncertainties Determination (ISO 17450﹘2.2012, MOD)

3 Terms and definitions

For the purpose of this document, the terms and definitions defined in ISO 12181﹘1 and ISO 17450﹘2 apply. 1) ISO 11562.1996 referenced in ISO 12181﹘2.2011 has been abolished and replaced by ISO 16610﹘21.2011.

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