GB/T 34874.6-2020 English PDF

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GB/T 34874.6-2020: Geometrical product specifications (GPS) - X-ray three dimensional size measuring machines - Part 6: Testing method of workpieces
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34874.6-2020	339	Add to Cart	4 days	Geometrical product specifications (GPS) - X-ray three dimensional size measuring machines - Part 6: Testing method of workpieces	Valid

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GB/T 35839   GB/T 35977   GB/T 34018   GB/T 34874.4   GB/T 34874.1   GB/T 34879   

Basic data

Standard ID: GB/T 34874.6-2020 (GB/T34874.6-2020)
Description (Translated English): Geometrical product specifications (GPS) - X-ray three dimensional size measuring machines - Part 6: Testing method of workpieces
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 17.040.30
Word Count Estimation: 18,115
Date of Issue: 2020-04-28
Date of Implementation: 2020-08-01
Quoted Standard: GB/T 16857.1; GB/T 18779.1; GB/T 34874.3; GB/T 34881; JJF 1001
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the method for workpiece inspection by X-ray three-dimensional measuring machine based on the principle of computed tomography (CT). This standard applies to industrial CT measuring machines with three-dimensional geometric dimension measurement functions.

GB/T 34874.6-2020: Geometrical product specifications (GPS) - X-ray three dimensional size measuring machines - Part 6: Testing method of workpieces

---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)-X-ray three dimensional size measuring machines--Part 6. Testing method of workpieces ICS 17.040.30 J04 National Standards of People's Republic of China Product Geometric Technical Specification (GPS) X-ray three-dimensional measuring machine Part 6. Workpiece inspection methods 2020-04-28 release 2020-08-01 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 Classification of detection tasks 1 5 Measurement procedure 2 5.1 Tomography imaging 2 5.2 3D image reconstruction 2 5.3 Contour extraction and surface reconstruction 2 5.4 Geometric size detection 2 5.5 Comparison of nominal and actual values 3 5.6 Wall thickness analysis 3 6 Workpiece size detection method 3 6.1 Overview 3 6.2 Device selection 3 6.3 Preparation for measurement 3 6.4 Measurement and analysis 4 6.5 Measurement report 4 6.6 Equipment verification 4 Appendix A (informative appendix) Influencing factors of the testing process 5 Appendix B (informative appendix) The effect of the tested workpiece material on the detection results of the X-ray 3D dimension measuring machine 9 Appendix C (informative appendix) Relationship with GPS matrix model 11 Reference 12

Foreword

GB/T 34874 "Product Geometric Technical Specification (GPS) X-ray Three-dimensional Dimension Measuring Machine" is divided into 6 parts. --- Part 1. Vocabulary; --- Part 2. General technical requirements and applications; --- Part 3. Acceptance testing and re-inspection testing; --- Part 4. Evaluation of measurement uncertainty; --- Part 5. Extraction and fitting of feature elements; --- Part 6. Workpiece detection methods. This part is Part 6 of GB/T 34874. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed and managed by the National Product Geometry Technical Standardization Technical Committee (SAC/TC240). This section was drafted by. Guangdong Academy of Metrology, China Machine Productivity Promotion Center, China Academy of Metrology, Shandong Metrology Academy of Sciences, Tianjin University, China Jiliang University, Carl Zeiss (Shanghai) Management Co., Ltd. The main drafters of this section. Shi Yushu, Ming Cuixin, Zhang Xinyu, Cao Cong, Zhang Yong, Pi Lei, Zhang Shu, Hu Xiaodong, Zhao Jun, Hu Jiacheng, Han Dingzhong, Zhu Yue. Product Geometric Technical Specification (GPS) X-ray three-dimensional measuring machine Part 6. Workpiece inspection methods

1 Scope

This part of GB/T 34874 stipulates that the X-ray three-dimensional dimension measuring machine based on the principle of computer tomography (CT) performs the workpiece Method of detection. This section applies to industrial CT measuring machines with three-dimensional geometric measurement functions.

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 16857.1 Technical Specification for Geometrical Quantity of Products (GPS) Acceptance Testing and Re-inspection Testing of Coordinate Measuring Machines Part 1. Vocabulary GB/T 18779.1 Technical Specification for Product Geometric Quantity (GPS) Measurement and Inspection of Workpieces and Measuring Equipment Part 1. Inspection according to specifications Judgment rules for pass or fail GB/T 34874.3 Product Geometric Technical Specification (GPS) X-ray 3D Dimensional Measuring Machine Part 3. Acceptance Inspection and Re-inspection Testing GB/T 34881 Product Geometric Technical Specification (GPS) Coordinate Measuring Machine Inspection Uncertainty Evaluation Guide JJF1001 General Measurement Terms and Definitions

3 Terms and definitions

GB/T 16857.1, GB/T 18779.1, GB/T 34881 and JJF1001 and the following terms and definitions apply to this file. 3.1 Dimensionalmeasurement The geometric parameters of the workpiece geometry (for example, shape and position) are determined by measurement. 3.2 Nominal/actual value comparison nominal/actual value comparison Digital-to-analog comparison Compare the geometric characteristics of two data sets, one of which is used as a reference data set (nominal value), and the other is used as the evaluated data set (real Interval). 3.3 Surface extraction Surface composition process from CT voxel data.

4 Classification of detection tasks

When using X-ray three-dimensional size measuring machine to inspect the workpiece, the inspection tasks are classified based on the basic characteristics of the workpiece to be measured. ......

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