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JJF 1795-2020 English PDF

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US$399.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1795-2020: Calibration Specification for Camshaft Measuring Instruments
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1795-2020	399	Add to Cart	4 days	Calibration Specification for Camshaft Measuring Instruments	Valid

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Basic data

Standard ID: JJF 1795-2020 (JJF1795-2020)
Description (Translated English): Calibration Specification for Camshaft Measuring Instruments
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Classification of International Standard: 17.040
Word Count Estimation: 18,156
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1795-2020: Calibration Specification for Camshaft Measuring Instruments

---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.
(Calibration specification of camshaft measuring instrument) National Metrology Technical Specifications of the People's Republic of China Calibration specification for camshaft measuring instrument 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Calibration specification for camshaft measuring instrument Central unit. National Technical Committee on Geometrical Length Measurement Main drafting unit. China YTO Group Co., Ltd. China Institute of Metrology Participated in the drafting unit. First Tractor Co., Ltd. Chongqing Institute of Metrology and Quality Inspection This specification entrusts the National Technical Committee on Geometrical Length Measurement to interpret The main drafters of this specification. Zhang Qiuyang (China YTO Group Co., Ltd.) Lin Min (China YTO Group Co., Ltd.) Huang Yao (Chinese Academy of Metrology) Participating drafters. Lin Hu (China Institute of Metrology) Sun Feng (First Tractor Co., Ltd.) Liu Mengmeng (First Tractor Co., Ltd.) Gu Yunping (First Tractor Co., Ltd.) Wu Xiaoli (Chongqing Institute of Metrology and Quality Inspection)

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and definitions (1) 4 Overview (1) 5 Measurement characteristics (2) 6 Calibration conditions (2) 6.1 Calibration items and main calibration instruments (2) 6.2 Environmental conditions (3) 7 Calibration items and calibration methods (3) 7.1 Oblique runout of spindle center (3) 7.2 Coaxiality of the two centers (4) 7.3 Parallelism to the top line when the axial measuring device moves (4) 7.4 The verticality of the line connecting the center to the center when the radial measuring device moves (4) 7.5 Indication error of radial measurement (5) 7.6 Repeatability of radial measurement (5) 7.7 Indication error of angle measurement (5) 7.8 Measurement repeatability of starting point (6) 7.9 Lift measurement error (6) 8 Calibration result expression (6) 9 Recalibration interval (6) Appendix A. Calibration Uncertainty Evaluation Example of Lift Measurement Error (7) Appendix B Reference Legend for Standard Eccentric Shaft and Special Mandrel (11)

Introduction

This specification is based on JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001-2011 "Tong Compile with Metrology Terms and Definitions and JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty". This specification is released for the first time. Calibration specification for camshaft measuring instrument

1 Scope

This specification applies to the calibration of vertical and horizontal camshaft measuring instruments with a center distance of no more than 600mm.

2 Reference documents

This specification refers to the following documents. JJG57 optical and digital indexing head JJF 1561 Gear Measurement Center Calibration Specification For dated reference documents, only the dated version applies to this specification; for undated references The latest version (including all amendments) is applicable to this specification.

3 Terms and definitions

3.1 Lift of the camshaft The amount of change in the working radius of the camshaft in the reference direction during the rotation of the camshaft around the axis. 3.2 Cam phase angle phaseangleofthecamshaft The angle between the specified point on the cam profile and the base circle axis relative to the reference plane. Note. The designated point can be the starting point or the highest point of the lift. The reference plane can be the center plane of the positioning keyway or the reference cam flat. 3.3 sensitivepoint When the camshaft rotates around the axis, the point where the lift change speed is the largest is called the sensitive point.

4 overview

Camshaft is the main component in engine and oil pump. The camshaft measuring instrument can measure the lift and phase angle of the camshaft And other geometric parameters. The camshaft measuring instrument is mainly divided into automatic type and manual type according to the movement form of the instrument. automatic The type is mainly vertical structure [Figure 1 (a)], a small amount is horizontal structure [Figure 1 (b)]; manual type is usually used Horizontal structure, including optical mechanical type, grating digital type, etc. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1795-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1795-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1795-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1795-2020_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.