GB/T 40799-2021 PDF EnglishUS$230.00 · In stock · Download in 9 seconds
GB/T 40799-2021: Machining process - Test methods for essential energy efficiency data Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 40799-2021: Machining process - Test methods for essential energy efficiency data---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT40799-2021NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.020 CCS J 30 GB 40799-2021 Machining process - Test methods for essential energy efficiency data ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsFOREWORD ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions... 4 4 Scope of essential energy efficiency data ... 6 5 Test method and calculation ... 6 Appendix A (Informative) Application example of essential energy efficiency data test in the machining process ... 12 Machining process - Test methods for essential energy efficiency data1 ScopeThis document specifies the test and calculation methods for essential energy efficiency data in the machining process. This document applies to the test of essential energy efficiency data in the machining process of metal cutting machine tools during machining.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB/T 4863, General terminology of machine-building technology GB/T 6477, Metal-cutting machine tools - Terminology3 Terms and definitionsTerms and definitions determined by GB/T 4863, GB/T 6477, and the following ones are applicable to this document. 3.1 machining process The part or entire process for a machine tool to complete the machining of a workpiece. 3.2 standby The state where the general power supply of the machine tool is turned on, and all other systems of the machine tool used to support machining, except the spindle and the feed system, are running. 3.3 idling The state, in standby, where the spindle system or feed system of the machine tool is turned on, and the spindle system or feed system is in the state where there is no cutting load. 3.4 cutting The running state where the machine tool is cutting and machining the workpiece. 3.5 standby power The input power when the machine tool is in standby (3.2). 3.6 idling power The input power when the machine tool is in idling (3.3). 3.7 cutting power The input power when the machine tool is in cutting (3.4). 3.8 material removal power The power increased for the machine tool to remove material. 3.9 energy consumption in standby period The energy consumed by the machine tool in standby (3.2). 3.10 energy consumption in idling period The energy consumed by the machine tool in idling (3.3). 3.11 energy consumption in cutting period 2) Idling power test: Turn on the machine tool spindle system or feed system, and record the tested power value; the stable operation time in idling stable is greater than 3/f, and the idling power is based on the partial power data after stable operation in the idling state or the average value of all power data; the idling power test should include all the idling states involved in the machining process. 3) Cutting power test: Record the input power value of the machine tool in the whole process from when the machine tool touches the workpiece to when the tool leaves the workpiece surface. The cutting power is based on the average value of the input power in the whole process. At the same time, the workpiece information, tool information and cutting parameters corresponding to the cutting process should be recorded. 5.2.2 Energy consumption test Install an electric energy tester at the power input end of the machine tool. After the machine tool is turned on, record the energy consumption values corresponding to the start time and end time of each running state of the machine tool. 5.3 Calculation 5.3.1 Power data The material removal power is calculated according to Formula (1). Where: Pmr – material removal power, in kilowatts (kW); Pc – cutting power, in kilowatts (kW); Pu – Idling power, in kilowatts (kW). 5.3.2 Energy consumption data 5.3.2.1 Energy consumption in standby period Energy consumption in standby period includes the energy consumption of a single standby period and the total energy consumption in standby period. The energy consumption in a single standby period is the energy consumption value at the end of a single standby process minus the energy consumption value at the start, which is shown in Formula (2); the total energy consumption in standby period is the sum of the energy consumption of each single idling period, which is shown in Formula (3). Where: Ei st – the energy consumption of a single standby period of the ith standby process, in kilowatt-hours (kW·h); Ei st,end – the energy consumption value at the end of the ith standby process, in kilowatt- hours (kW·h); Ei st,start – the energy consumption value at the start of the ith standby process, in kilowatt- hours (kW·h); Est – the total energy consumption in standby period, in kilowatt-hours (kW·h); Qst – the total number of standby processes. 5.3.2.2 Energy consumption in idling period Energy consumption in idling period includes the energy consumption of a single idling period and the total idling energy consumption. The energy consumption of a single idling period is the energy consumption value at the end of a single idling process minus the energy consumption value at the start, which is shown in Formula (4); the total energy consumption in idling period is the sum of the energy consumption of each single idling period, which is shown in Formula (5). Where: Ei u – the energy consumption of a single idling period of the ith idling process, in kilowatt-hours (kW·h); Ei u,end – the energy consumption value at the end of the ith idling process, in kilowatt- hours (kW·h); Ei u,start – the energy consumption value at the start of the ith idling process, in kilowatt- hours (kW·h); Eu – the total energy consumption in idling period, in kilowatt-hours (kW·h); Qu – the number of idling processes. c) Tool information Tool material: hard alloy. d) Processing sequence The processing sequence is as follows: -- right end of the machine; -- cylindrical turning ϕ47 mm × 110 mm; -- cylindrical turning ϕ44 mm × 105 mm; -- cylindrical turning ϕ41 mm × 100 mm; -- chamfer C1. A.1.2 Test cycle The test cycle is all the running processes of the CNC machine tool from startup to shut- down. A.1.3 Test condition and instrument A.1.3.1 The test environment is normal temperature and normal pressure. A.1.3.2 The test instrument is a power analysis instrument that integrates the functions of a power meter, an electric energy tester and a stopwatch, and its accuracy level is 0.1. A.1.3.3 Install the power analyzer according to the method in 5.2.1; the test frequency is 20 Hz. A.1.4 Power test A.1.4.1 Standby power test The operation sequence of the machine tool is shown in Table A.1. The standby is the state after the cutting cooling system runs stably; the standby power is based on the average value of the power data measured when the cutting cooling system runs stably for 2 minutes. The measurement results are shown in Table A.1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 40799-2021 be delivered?Answer: The full copy PDF of English version of GB/T 40799-2021 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 40799-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 40799-2021_English will be deemed to be sold to your employer/organization who actually paid 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+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 40799-2021 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 40799-2021?A step-by-step guide to download PDF of GB/T 40799-2021_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 40799-2021". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
