GB/T 21949.1-2008 English PDF

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GB/T 21949.1-2008: CNC universal tool milling machines -- Part 1: Testing of the accuracy
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Basic data

Standard ID: GB/T 21949.1-2008 (GB/T21949.1-2008)
Description (Translated English): CNC universal tool milling machines -- Part 1: Testing of the accuracy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J54
Classification of International Standard: 25.080.20
Word Count Estimation: 35,367
Date of Issue: 2008-06-03
Date of Implementation: 2009-01-01
Quoted Standard: GB/T 17421.1-1998; GB/T 17421.2-2000; GB/T 19660-2005
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 universal milling machine tool geometric accuracy, positioning accuracy and precision of test requirements and test methods. This section applies to the horizontal work surface width 200 mm to 630 mm general purpose ordinary grade level accuracy and precision CNC universal milling machine tools.

GB/T 21949.1-2008: CNC universal tool milling machines -- Part 1: 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.
CNC universal tool milling machines Part 1. Testing of the accuracy ICS 25.080.20 J54 National Standards of People's Republic of China CNC universal milling machine tools - Part 1. Testing of the accuracy 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

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 General requirements 1 3.1 Units of measurement 1 3.2 Installation Level 1 3.3 Test sequence 1 3.4 Test Item 1 3.5 inspection tool 1 3.6 Working accuracy test 1 3.7 minimum tolerance 2 3.8 Inspection direction 2 3.9 Test plane 2 3.10 universal machine host with the work desktop test 2 4 Part 2 and motion axis name Geometric tests 3 5 25 6 Positioning accuracy test 7 Working accuracy test 27

Foreword

GB/T 21949 "CNC universal milling machine tools" is divided into two parts. --- Part 1. Testing of the accuracy; --- Part 2. Technical requirements. This is Part 1 GB/T 21949 of. This part is proposed by China Machinery Industry Federation. This part of the National Metal Cutting Machine Standardization Technical Committee (SAC/TC22) centralized. This section is drafted. Kunming milling plant. The main drafters of this section. LORRAINE steady, Tanzhao Kang. CNC universal milling machine tools - Part 1. Testing of the accuracy

1 Scope

This section GB/T 21949 specifies the CNC universal milling machine tool geometric precision, positioning accuracy and precision requirements and testing Testing method. This section applies to the horizontal (Magnum, NC rotary) working table width 200mm ~ 630mm general purpose general level and Precision Precision CNC universal milling machine tools.

2 Normative references

The following documents contain provisions which, through reference GB/T 21949 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. 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) GB/T 19660-2005 Industrial automation systems and integration - Numerical control of machines and motion coordinate system named (ISO 841. 2001, IDT)

3 General requirements

3.1 Units of measurement This section all linear dimensions are in millimeters (mm) represents; major angular deviation as a ratio. In some cases For clarity, Also used microradians (μrad) or arcsec ( ") indicates its conversion relation formula below. 0.010/1000 = 10μrad≈2 " 3.2 Installation level According to GB/T 17421.1-1998 adjust the machine to install the 3.1 level. The table in the middle position of travel. Workbench Place the central level meter. Levels in both vertical and horizontal readings are not more than 0.04/1000. 3.3 Test order Inspection order under this Part may not represent the actual test sequence. In order to make an inspection tool assembly and disassembly and inspection of convenience, can be arbitrary Order of inspection. 3.4 Test Project When the test machine, according to the structural characteristics must not test all of the items in this section. When testing requirements for acceptance purposes, can Select the manufacturer to obtain the consent of interested test items by the user, but these test items must be clearly stated at the time of ordering the machine. Test case associated with the horizontal bench test items using only the first level table I install base installation. 3.5 inspection tool Test tools provided in this section is only an example, you can use the same amount of instructions or have other tools to test at least the same accuracy. Indicators should have a 0.001mm or higher resolution. 3.6 Working accuracy test Working accuracy test shall be carried out after finishing. ......

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