GB/T 25372-2010 English PDF

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GB/T 25372-2010: Metal-cutting machine tools -- Accuracy grade
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25372-2010	189	Add to Cart	3 days	Metal-cutting machine tools -- Accuracy grade	Valid

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Basic data

Standard ID: GB/T 25372-2010 (GB/T25372-2010)
Description (Translated English): Metal-cutting machine tools -- Accuracy grade
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J50
Classification of International Standard: 25.080.10
Word Count Estimation: 8,861
Date of Issue: 2010-11-10
Date of Implementation: 2011-03-01
Quoted Standard: GB/T 1184-1996; GB/T 1800.1-2009; GB/T 2363-1990; GB/T 10095.1-2008; GB/T 10095.2-2008
Regulation (derived from): National Standard Approval Announcement 2010 No.8 (Total No.163)
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 level of accuracy of various types of metal-cutting machine tools, This standard applies to metal cutting machine tools.

GB/T 25372-2010: Metal-cutting machine tools -- Accuracy grade

---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.
Metal-cutting machine tools. Accuracy grade ICS 25.080.10 J50 National Standards of People's Republic of China Metal cutting machine accuracy rating Issued on. 2010-11-10 2011-03-01 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. Sichuan Changzheng Machine Tool Group Co., Ltd., Beijing Machine Tool Research Institute. The main drafters of this standard. Wang Xiaohui, Xu Bank of China, Li Xiangwen. Metal cutting machine accuracy rating

1 Scope

This standard specifies the level of accuracy of various types of metal-cutting machine tools. This standard applies to metal cutting machine tools (hereinafter referred to as the 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 1184-1996 shape and position tolerances without individual tolerance value (eqv ISO 2768-2. 1989) Part 1 GB/T 1800.1-2009 Geometrical product specifications (GPS) Limits and fits. Tolerances, deviations and fits basis (ISO 286-1. 1988, MOD) GB/T 2363-1990 small modulus involute cylindrical gears accuracy GB/T 10095.1-2008 Cylindrical gear accuracy system - Part 1. Definitions tooth surface deviation and ipsilateral tooth allowable value (ISO 1328-1.1995, IDT) GB/T 10095.2-2008 Cylindrical gear accuracy system - Part 2. radial composite deviations and runout Definitions and allowable values (ISO 1328-2.1997, IDT) Principle 3 machine precision grade 3.1 According to the workpiece to be machined precision machining, machine grading absolute absolute accuracy is divided into six levels, respectively, in Roman numerals Ⅵ, Ⅴ, Ⅳ, Ⅲ, Ⅱ, Ⅰ expressed, Ⅵ level precision lowest level Ⅰ highest precision. 3.2 specific to each type of machine, it should be based on the absolute levels of precision, according to the relative grading is divided into three relative accuracy levels, respectively Chinese phonetic letters P, M, G, said. P --- Ordinary Level (pronounced "P" in the model number P omitted); M --- Precision (pronounced "secret"); G --- precision (pronounced "high"). 3.3 The type of machine according to the specific circumstances, to determine one, two or three relatively precision. 3.4 P-level precision machine tools, precision indicators should be with the existing relevant international standards or advanced foreign standards of technical level quite. 3.5 P-level precision cylindrical surface machining machine tools, precision machining to achieve its dimensional tolerances GB/T 1800.1-2009 provisions of IT6 to IT7 , Roundness, cylindrical reached GB/T 1184-1996 stipulated eight precision machining, general precision grade Ⅴ response should be absolutely level (for example, lying Lathe). 3.6 P-level precision machine tools flat, flatness, squareness if they can reach GB/T 1184-1996 predetermined level 6-7 shape and position Tolerance machining accuracy, precision grade Ⅴ general response should be absolutely level (for example, milling machine). 3.7 P-level precision tooth face machining, if they can reach GB/T 2363-1990 or GB/T 10095.1-2008 and GB/T 10095.2-2008 provisions 6-7 gear tolerance machining accuracy, precision grade Ⅴ general response should be absolutely level (for example, insert Cutting Machine). 3.8 from grade to grade Ⅴ Ⅵ, Ⅴ grade to grade Ⅳ, Ⅳ grade to grade Ⅲ, Ⅲ grade to grade Ⅱ, grade Ⅰ to Ⅱ level precision machine tools, precision standard work Tolerance values \u200b\u200baccuracy of test items should be in accordance with the requirements of precision machining objects, to determine the absolute accuracy class machine work accuracy test project its neighboring Tolerance value ratio. ......

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