GB/T 21945-2008 English PDF

US$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21945-2008: Numerical control sector gear shaping machines -- Testing of the accuracy
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21945-2008	299	Add to Cart	3 days	Numerical control sector gear shaping machines -- Testing of the accuracy	Valid

Similar standards

GB/T 38193   JB/T 8490   GB 16454   GB/T 21947   GB/T 21946   

Basic data

Standard ID: GB/T 21945-2008 (GB/T21945-2008)
Description (Translated English): Numerical control sector gear shaping machines -- Testing of the accuracy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J56
Classification of International Standard: 25.040.20
Word Count Estimation: 13,166
Date of Issue: 2008-06-03
Date of Implementation: 2009-01-01
Quoted Standard: GB/T 8170-1987; GB/T 17421.1-1998; GB/T 17421.2-2000
Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the CNC sector gear shaper machine requirements and methods of geometric accuracy and precision testing. This standard applies to a maximum workpiece diameter 200 mm CNC sector gear shaper machine.

GB/T 21945-2008: Numerical control sector gear shaping machines -- Testing of the accuracy

---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.
Numerical control sector gear shaping machines. Testing of the accuracy ICS 25.040.20 J56 National Standards of People's Republic of China CNC sector gear shaping machine accuracy test Posted 2008-06-03 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China Machinery Industry Federation. The standard metal cutting machine tools by the National Standardization Technical Committee (SAC/TC22) centralized. This standard was drafted. Yichang lead plane technology limited liability company, Tianjin No.1 Machine Tool Works. The main drafters of this standard. Juwan whole, Cheng Liangfan.

Introduction

This not only unified standards such precision machine tools and inspection standard in the country, CNC sector gear shaping machine Accuracy test finished products provide the technical basis and delivery and acceptance, but also to promote the CNC sector gear interpolation upgrading and technological progress gear machine products and promote Product trade and economic development, improve the quality of these products help to stabilize and enhance the market competitiveness of products. CNC sector gear shaping machine accuracy test

1 Scope

This standard specifies the CNC sector gear shaping machine (hereinafter referred to as "Machine") requirements and methods of geometric accuracy and precision testing. This standard applies to the maximum workpiece diameter to 200mm CNC sector gear shaping machine.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 8170-1987 Rules for rounding numbers GB/T 17421.1-1998 Test code for machine tools - Part 1. under no-load or finishing conditions Geometric accuracy of machines (Eqv ISO 230-1.1996) GB/T 17421.2-2000 Test code for machine tools - Part 2. CNC axis positioning accuracy and repeatability of determination (Eqv ISO 230-2.1997)

3 General requirements

3.1 of this standard shall GB/T 17421.1-1998 and GB/T 17421.2-2000. Especially the mounting accuracy inspection before Spindles and other parts of the warming air operation, precision test methods and test tools. 3.2 before testing the machine, the first table (or columns) in the middle position of travel, and then adjust the level of machine installation. For tilting table Oblique machine tools, work surfaces should be placed in 0 ° position, then the machine leveling. Level on the bench in the middle position in the longitudinal and transverse directions Reading not more than 0.04/1000. 3.3 When testing side when scraping the surface, allowing the test pad Block between surface and probe test. The accuracy of test items 3.4 standard listed in the order, the order does not indicate the actual test. In order to test tools and test assembly and disassembly convenient, Any order for inspection. 3.5 inspection tools, according to the structural characteristics of the standard test is not required in all projects. For the purpose of acceptance testing requirements, the Users can obtain the manufacturer agreed to choose some interesting test items, but these items must be clearly stated in the test machine when ordering. 3.6 when the measured length of this standard is not the same length, tolerances should be GB/T 17421.1-1998 off provisions in 2.3.1.1 Operators. Result of the conversion is less than 0.001mm, 0.001mm based upon the count. 3.7 Tolerance calculation result mantissa according to the provisions GB/T 8170-1987 of rounding to the nearest 0.001mm. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21945-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21945-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21945-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21945-2008_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.