JJG 740-2005 English PDFUS$679.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 740-2005: Verification Regulation of Milling Straight Edges Status: Valid JJG 740: Historical versions
Basic dataStandard ID: JJG 740-2005 (JJG740-2005)Description (Translated English): Verification Regulation of Milling Straight Edges Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A52 Classification of International Standard: 17.040 Word Count Estimation: 26,256 Date of Issue: 2005-03-03 Date of Implementation: 2005-09-03 Older Standard (superseded by this standard): JJG 740-1991 Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine Summary: This standard applies to grind the surface flat feet initial verification, testing and use of follow-up inspection. JJG 740-2005: Verification Regulation of Milling Straight Edges---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.Verification Regulation of Milling Straight Edges National Metrology Verification Regulations of the People's Republic Polished surface Released on.2005-03-03 2005-09-03 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Grinding surface flat rule verification procedure Replace JJG 740-1991 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 3,.2005, and It will take effect on September 3,.2005. Focal Point. National Geometric Quantity Engineering Measurement Technology Committee Drafting unit. Beijing Institute of Metrology This regulation entrusts the National Geometric Quantity Engineering Parametric Measurement Technical Committee to explain Drafters of this procedure. Ma Guiru (Beijing Institute of Metrology) Wu Xun (Beijing Institute of Metrology) Liu Zhenfu (Beijing Institute of Metrology) table of Contents1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 Surface roughness of the working surface (1) 4.2 Flatness of working face (2) 5 General technical requirements (2) 5.1 Appearance (2) 5.2 Surface quality (2) 6 measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification project (2) 6.3 Verification method (2) 6.4 Processing of verification results (4) 6.5 verification period (4) Appendix A Isometric Interferometry Measurement Flatness and Calculation (5) Appendix B. Simplified formula for calculating the formula (1) by the segmentation method (n=3~6) Appendix C Example of data processing for measuring the flatness of the flat surface of the grinding surface (9) Appendix D Evaluation of Uncertainty in Measurement Results of Flatness of Flat Surface of Grinding Surface (13) Appendix E Format of the certificate and verification result notice (21) Grinding surface flat rule verification procedure1 ScopeThis procedure is applicable to the first verification, subsequent verification and in-use inspection of the polished surface.2 CitationsThis procedure refers to the following documents. JJG 28-2000 flat crystal JJG 661-2004 plane isometric interferometer JJF1001-1998 general measurement terms and definitions JJF1059-1999 Measurement Uncertainty Evaluation and Representation JJF1094-2002 measuring instrument characteristics evaluation ISO 14253.2.1999 Guide to the assessment of GPS measurement uncertainty in measurement equipment calibration and product inspection When using this procedure, care should be taken to use the current valid version of the above cited documents.3 OverviewThe polished surface ruler is a precise planar standard instrument whose structural shape is shown in (a) and (b) of Fig. 1. The flat surface of the grinding surface is mainly used to verify the straightness of the working edge of the knife-edge ruler. Figure 1 Schematic diagram of the flat surface of the polished surface4 Metrological performance requirements4.1 Surface roughness of the working surface The surface roughness of the flat surface of the polished surface shall comply with the requirements of Table 1. Table 1 Surface roughness of the flat surface of the polished surface Polishing surface flat length/mm ≤ 330 > 330 Ra value/μm ≤ 0.025 ≤ 0.05 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJG 740-2005_English be delivered?Answer: Upon your order, we will start to translate JJG 740-2005_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JJG 740-2005_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 740-2005 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
