GB/T 21946-2008 English PDF

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GB/T 21946-2008: Numerical control gear shaving machines -- Testing of the accuracy
Status: Valid

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Basic data

Standard ID: GB/T 21946-2008 (GB/T21946-2008)
Description (Translated English): Numerical control gear shaving 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: 17,123
Date of Issue: 2008-06-03
Date of Implementation: 2009-01-01
Quoted Standard: GB/T 10095.1-2001; 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 shaving machine (hereinafter referred to as the "Machine") requirements and methods of geometric accuracy and precision testing. This standard applies to the maximum workpiece diameter 125mm ~ 500mm of CNC gear shaving machine.

GB/T 21946-2008: Numerical control gear shaving 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 gear shaving machines. Testing of the accuracy ICS 25.040.20 J56 National Standards of People's Republic of China CNC shaving 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. Chongqing Machine Tool (Group) Co., Ltd., Nanjing Machine Tool Co., Ltd. The main drafters of this standard. Li Yan hair treatment, Mr. Lee Kwong, David Zhang, Laying force, Liao Cheng Yu, Mao Haixia.

Introduction

With the recent development of high technology, market and customer CNC shaving machine put forward higher requirements, in order to meet their needs, and then push Into the CNC machine tool industry, to enhance China-made CNC machine shaving level of accuracy, and actively participate in international competition, JB/T 8485.2-1998 basis On the drafting of the preparation of CNC shaving machine accuracy test national standard is necessary. The standard relating to supporting standards constitute CNC shaving machine product standards as CNC shaving machine design, manufacturing and quality inspection Assurance of an important technical basis. CNC shaving machine accuracy test

1 Scope

This standard specifies the CNC shaving machine (hereinafter referred to as "Machine") requirements and method of geometric accuracy and precision testing. This standard applies to the maximum workpiece diameter of 125mm ~ 500mm CNC shaving 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 10095.1-2001 involute cylindrical gears accuracy - Part 1. Definitions flanks of gear and allowable values \u200b\u200bof deviations (Idt ISO 1328-1.1997) 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 When using this standard should be GB/T 17421.1 of the provisions, especially the mounting accuracy inspection before spindles and other parts air Turn the heat up, the accuracy of testing methods and tools. 3.2 according to GB/T 17421.1-1998 adjust the machine to install the 3.1 level, the table placed in the middle position of travel, the workbench Central place dedicated deck, which is placed on a level. Levels in the longitudinal and lateral readings should not be more than 0.04/1000. Geometric test sequence 3.3 project is in accordance with the arrangement of machine components, it does not indicate the actual test sequence. Inspection, can be generally installed Split testing tools and testing convenient, arrange inspection order. 3.4 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. 3.5 When the measured value with a predetermined length of this standard is not the same, the given tolerance value should be GB/T 17421.1-1998 in 2.3.1.1 Conversion rules, the conversion value is less than 0.001mm, 0.001mm based upon the count. ......

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