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GB/T 38929-2020 English PDF

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US$409.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 38929-2020: General requirements of mirror milling process for civil aircraft skin parts
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38929-2020	409	Add to Cart	4 days	General requirements of mirror milling process for civil aircraft skin parts	Valid

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Basic data

Standard ID: GB/T 38929-2020 (GB/T38929-2020)
Description (Translated English): General requirements of mirror milling process for civil aircraft skin parts
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: V18
Classification of International Standard: 49.040
Word Count Estimation: 22,290
Date of Issue: 2020-06-02
Date of Implementation: 2020-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38929-2020: General requirements of mirror milling process for civil aircraft skin parts

---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.
(General requirements for mirror milling process of civil aircraft skin) ICS 49.040 V18 National Standards of People's Republic of China General requirements of mirror milling technology for civil aircraft skin 2020-06-02 release 2020-12-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 General requirements 2 4.1 Personnel 2 4.2 Material 2 4.3 Equipment and Tooling 2 4.4 Security Protection 2 5 Feature definition and classification 2 5.1 Feature definition 2 5.2 Classification of Sag Features 4 5.3 Window feature classification 5 5.4 Hole feature classification 5 5.5 Classification of boss features 5 5.6 Contour feature classification 6 6 Programming method 6 6.1 General 6 6.2 Mirror milling programming of face features 7 6.3 Mirror milling programming of depressed features 7 6.4 Window feature programming 7 6.5 Milling programming of hole features 8 6.6 Contour feature milling programming 9 7 Process control 10 7.1 Process flow 10 7.2 Process preparation 10 7.3 Compiling CNC program 10 7.4 Post-processing and processing simulation 11 7.5 Preparation before skin milling 11 7.6 Actual profile acquisition and program modification 11 7.7 Skinning and milling 11 7.8 Disassembling the skin 11 8 Quality Control 11 Appendix A (informative appendix) The allowable error reference value of the geometric accuracy test item of the skin mirror milling equipment is 13 Appendix B (informative appendix) Skin mirror image structure accuracy detection method 14

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Aircraft Standardization Technical Committee (SAC/TC435). This standard was drafted by. Jiangxi Hongdu Aviation Industry Group Co., Ltd., Nanjing University of Aeronautics and Astronautics, Xi'an Aircraft Industry (Group) Limited liability company, China Aviation Comprehensive Technology Research Institute. The main drafters of this standard. Xiang Bingfei, Li Yingguang, Guan Yujie, Xu Ming, Wei Minzhen, Kou Jie, Zhou Zuowen, Xiong Yong, Hao Xiaozhong, Xiong Xu, Ouyang Ping, Liu Xu, permission. General requirements of mirror milling technology for civil aircraft skin

1 Scope

This standard specifies the general requirements for mirror milling of skin parts, feature definition and classification, programming methods, process flow, and quality control. This standard applies to the mirror milling of metal skin parts for civil aircraft. Other products can be implemented by reference.

2 Normative references

The following documents are essential for the application of this document. For dated reference documents, 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 4863 Basic terminology of mechanical manufacturing process GB/T 6477 Metal cutting machine terminology

3 Terms and definitions

The terms and definitions defined in GB/T 4863 and GB/T 6477 and the following apply to this document. 3.1 Mirror milling The position and posture of the milling tool and the position and posture of the back support device are approximately mirror images at the same time, and synchronized and coordinated movements are completed to complete the Leather processing, as shown in Figure 1. Figure 1 Schematic diagram of mirror milling 3.2 Jacking device holdersystem Follow the mirror movement of the milling spindle head, and have the function of maintaining the rigidity of the processing area, and can monitor the skin processing in real time during the processing The thickness of the device. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 38929-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 38929-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 38929-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 38929-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.