JJG 7-2004 English PDF

US$629.00 · In stock
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JJG 7-2004: Verification Regulation of Squares
Status: Valid

JJG 7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 7-2004	629	Add to Cart	5 days	Verification Regulation of Squares	Valid
JJG 7-1986	439	Add to Cart	4 days	Verification Regulation of Scale Square	Obsolete
JJG 7-1958	RFQ	ASK	3 days	(Chinese Industry Standard)	Obsolete

Similar standards

JJG 517   JJG 0061   JJG 5   JJG 4   JJF 011   JJF 007   

Basic data

Standard ID: JJG 7-2004 (JJG7-2004)
Description (Translated English): Verification Regulation of Squares
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Classification of International Standard: 17.040
Word Count Estimation: 24,252
Date of Issue: 2004-03-02
Date of Implementation: 2004-09-02
Older Standard (superseded by this standard): JJG 7-1986% JJG 61-1980
Quoted Standard: JJF 1001; JJF 1059; JJF 1094; GB/T 6092
Regulation (derived from): Administration of Quality Supervision, Inspection and Quarantine of 2004 No. 24
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to foot rectangular initial verification, testing and use of follow-up inspection.

JJG 7-2004: Verification Regulation of Squares

---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 Squares National Metrology Verification Regulations of the People's Republic Square ruler Squares Released on.2004-03-02 2004-09-02 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Rectangular rule verification procedure ofSq Uares Replace JJG 61-1980 JJG 7-1986 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 02,.2004, and Implemented on September 2,.2004. Focal Point. National Geometric Angle Measurement Technical Committee Main drafting unit. Shaanxi Institute of Metrology and Testing Xi'an University of Architecture and Technology Participated in the drafting unit. Saibao Metrology Testing Center Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences This regulation entrusts the National Geometrical Angle Measurement Technical Committee to explain The main drafters of this procedure. Wang Caixia (Shaanxi Institute of Metrology and Testing) Chang Qing (Shaanxi Institute of Metrology and Testing) Wang Pingan (Xi'an University of Architecture and Technology) Participate in the drafters. Zhang Hui (Shaanxi Institute of Metrology and Testing) Liu Yanan (Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrological performance requirements (7) 4.1 Surface roughness of measuring surface, base surface and side surface (7) 4.2 Flatness of measuring surface and base surface (7) 4.3 Straightness of measuring surface (7) 4.4 Parallelism between bases (7) 4.5 Verticality of the side with respect to the base (7) 4.6 The perpendicularity of the α, β angle measurement surface relative to the base surface (7) 4.7 Line steel rectangular square indication error (7) 5 General technical requirements (7) 6 Measuring instrument control (8) 6.1 Verification conditions (8) 6.2 Verification project (9) 6.3 Verification method (9) 6.4 Processing of verification results (16) 6.5 Verification cycle (16) Appendix A Gap Method and Direct Measurement Method (17) Appendix B Certification Certificate Page Format (18) Appendix C Format of the results of the verification result notice (19) Rectangular rule verification procedure

1 Scope

This procedure applies to the first verification, subsequent verification and in-use inspection of the square.

2 Citations

This procedure refers to the following documents JJF1001-1998 general measurement terms and definitions JJF1059-1999 Measurement Uncertainty Evaluation and Representation JJF1094-2002 measuring instrument characteristics evaluation GB/T 6092-2004 square ruler When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

The square ruler is a gage commonly used in inspection and scribing work. For checking the verticality of the workpiece or the calibration instrument, machine tool The mutual perpendicularity of the vertical and horizontal guide rails. Usually made of steel, cast iron or granite. According to its structure, it can be divided into right angles of the cylinder. Ruler (Fig. 1), rectangular square (Fig. 2), triangular square (Fig. 3), knife-shaped square (Fig. 4), cast iron straight Square (Figure 5), wide square (Figure 6), flat square (Figure 7), wire steel square (Figure 8). Basic The dimensions and accuracy levels and indication errors are shown in Tables 1 to 8. Figure 1 Cylindrical square Table 1 Basic dimensions and accuracy grade of cylindrical square Accuracy level 00, 0 basic size H.200 315 500 800 1250 D 80 100 125 160.200 ......

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