GB/T 9634.8-2018 English PDF

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GB/T 9634.8-2018: Ferrite cores -- Guideline on the limits of surface irregularities -- Part 8: PQ-cores
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 9634.8-2018	199	Add to Cart	3 days	Ferrite cores -- Guideline on the limits of surface irregularities -- Part 8: PQ-cores	Valid

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Basic data

Standard ID: GB/T 9634.8-2018 (GB/T9634.8-2018)
Description (Translated English): Ferrite cores -- Guideline on the limits of surface irregularities -- Part 8: PQ-cores
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L19
Classification of International Standard: 29.100.10
Word Count Estimation: 10,166
Date of Issue: 2018-03-15
Date of Implementation: 2018-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 9634.8-2018: Ferrite cores -- Guideline on the limits of surface irregularities -- Part 8: PQ-cores

---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.
Ferrite cores--Guideline on the limits of surface irregularities--Part 8. PQ-cores ICS 29.100.10 L19 National Standards of People's Republic of China The limit guide for surface defects of ferrite cores Part 8. PQ Cores Part 8. PQ-cores Published by.2018-03-15 2018-10-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released Directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Surface Defect Limit 1 4.1 Dropping Blocks and Irregular Edges 1 4.2 Crack 3 4.3 Die 5 4.4 Crystalline 5 4.5 Flash 5 4.6 air hole 6 Reference 7 Figure 1 Surface Defect Example 1 Figure 2 Blocking and Irregular Edges Diagram 2 Fig. 3 Crack schematic 4 Figure 4 PQ core size 4 Figure 5 sticking schematic diagram 5 Figure 6 Figure 5 Figure 7 Sketch of flash 6 Figure 8 Schematic diagram 6 Table 1 Limits of Permissible Block Size 2 Table 2 Visual reference area and length 3 Table 3 Crack Limit 4

Foreword

GB/T 9634, "Finite Core Surface Defect Limit Guide" consists of the following components and is increasing. --- Part 1. General; ---Part 2. RM cores; --- Part 3. ETD and E cores; --- Part 4. Annular magnetic core; --- Part 8. PQ cores; This part is Part 8 of GB/T 9634. This section was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing agency of this document does not assume responsibility for identifying these patents. This section was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part is under the jurisdiction of the National Standardization Technical Committee for Magnetic Components and Ferrite Materials (SAC/TC89). This section was drafted. Tiantong Holdings Co., Ltd., China Electronics Standardization Institute, Nanjing Jing Yan Magnetic Technology Co., Ltd. Division, Hengdian Group Dongci Co., Ltd., Nanjing Xinkangda Magnetic Industry Co., Ltd., Cooper Electronic Technology (Shanghai) Co., Ltd., Shandong Zhongzhong Rui Electronics Co., Ltd., Zhejiang Institute of Metrology. The main drafters of this section. Zhang Ruibiao, Cui Ying, Sun Jiangping, Shao Feng, Tang Jie, Meng Guofeng, Tan Weizhong, Li Yinchuan, Dong Shengyu, Song Yanyan, Liu Jiuxi, Yan Chong, Zhao Guang, Yan Yipeng, Lu Mingyue, and Zhi Zhishu. The limit guide for surface defects of ferrite cores Part 8. PQ Cores

1 Scope

This part of GB/T 9634 specifies guidelines for the surface imperfection limit of PQ cores that comply with the relevant general specification. This section applies to PQ magnetic cores made of magnetic oxides.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 9634.1 Guide for Limiting Surface Defects in Ferrite Cores Part 1. General GB/T 28864.1 Soft Ferrite Core Definition of Terms Part 1. Physical Defects Terminology GB/T 28864.2 Soft Ferrite Core Definition of Terms Part 2. Dimensions

3 Terms and definitions

The following terms and definitions, as defined in GB/T 9634.1 and GB/T 28864.1, apply to this document. 3.1 Stomatal pores Holes left on the surface of the core after sintering and surface treatment (see Figure 1). Example. An example of the remaining surface defects of the PQ core is also shown in Figure 1. Figure 1 Surface defect example

4 surface defect limit

4.1 Blocking and Irregular Edges 4.1.1 Locating Blocks and Irregular Edges on the Matching Plane The permissible limits for the area of the mating surface (C1 and C1' in Figure 2). ......

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