GB/T 32245-2015 English PDF

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GB/T 32245-2015: Numerical control system of machine tool -- Reliability test and evaluation
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Basic data

Standard ID: GB/T 32245-2015 (GB/T32245-2015)
Description (Translated English): Numerical control system of machine tool -- Reliability test and evaluation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J50
Classification of International Standard: 65.060.40
Word Count Estimation: 36,313
Date of Issue: 2015-12-10
Date of Implementation: 2016-07-01
Regulation (derived from): National Standard Announcement 2015 No.38
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

GB/T 32245-2015: Numerical control system of machine tool -- Reliability test and evaluation

---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.
Numerical control system of machine tool - Reliability test and evaluation ICS 25.040.20 J50 National Standards of People's Republic of China Testing and Evaluation of Reliability of Machine Tool Numerical Control System 2015-12-10 released 2016-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III Introduction IV 1 Scope 1

2 terms and definitions

3 sample 3 3.1 sampling plan 3 3.2 sampling requirements 3 4 Test Plan 3 4.1 Overview 3 4.2 timing test program 4 4.3 Sequential Test Scheme 5 5 test mode 9 5.1 Classification 9 5.2 Actual load test 9 5.3 Simulation load test 9 5.4 Test mode selection 10 6 Test conditions 10 6.1 Overview 10 6.2 Actual load test conditions 6.3 Simulation load test conditions 12 6.4 Test conditions Tolerance 12 6.5 Test facilities and instruments 7 Test Flow 12 8 Test the processing program 13 Status Monitoring and Information Recording 9.1 Condition monitoring 13 9.2 Information records 13 10 fault criteria and fault handling 13 10.1 Principle 13 10.2 associated failure 13 10.3 Non-associated failure 14 10.4 Have a replacement test troubleshooting 14 11 Test Report 14 Appendix A (informative) Reliable evaluation of the reliability of the program 15 Appendix B (informative) Timing and sequential test program point estimation and unilateral lower limit estimation 16 Appendix C (Normative Appendix) Sequential Test Scheme Confidence Interval Upper and Lower Limits 17 Appendix D (informative) Reliability Test Record Table 26 Appendix E (informative) Reliability Test Fault Record Table 27 Appendix F (informative) Failure Analysis Table 28 Appendix G (informative) Reliability Test Conclusion Table 29 Reference 30

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the China Machinery Industry Federation. This standard by the National Machine Tool Numerical Control System Standardization Technical Committee (SAC/TC367) centralized. The main drafting unit of this standard. Huazhong University of Science and Technology, Wuhan Huazhong Numerical Control Co., Ltd., Guangzhou CNC Equipment Co., Ltd., Beijing Airlines Air and Space University, the State Machine Tool Quality Supervision and Inspection Center, Dalian Guangyang Technology Co., Ltd., Beijing Aerospace CNC System Co., Ltd., Shenyang high Precision CNC Technology Co., Ltd. The main drafters of this standard. Jin Jian, Zhang Hangjun, Zhu Zhihong, Zhang Yujie, Yao Jinyong, Gao Liansheng, Zhao Qinzhi, Wang Shengwen, Zhang Zhiyun, TAO Yaodong, XIA Jiqiang, HUANG ZuGuang, PENG Chong, XING Guochun, LIU Qiang, XUE Ruijuan, FENG Zhaobing.

Introduction

Reliability is one of the important attributes of CNC machine tools, but also one of the key factors affecting the market share of CNC system. machine Bed CNC system industry, the lack of reliability testing and assessment of the relevant standards, can not be a unified evaluation of the reliability of CNC system level, restricting the machine Standardized Development of Numerical Control System. Machine tool CNC system is a high-tech products, with structural features complex, high cost characteristics, to carry out reliability testing not only have a long week Period, and the need for a certain number of machine tool CNC system products, auxiliary equipment and blank materials such as investment, therefore, a good reliability test side The need for cost, efficiency and confidence in a number of aspects of the balance, the development of this standard is to achieve this purpose. Testing and Evaluation of Reliability of Machine Tool Numerical Control System

1 Scope

This standard specifies the requirements and methods of reliability testing and evaluation of machine numerical control system. This standard applies to machine numerical control system, similar to the numerical control system can refer to this standard.

2 terms and definitions

The following terms and definitions apply to this document. 2.1 CNC machine numerical control system numericalcontrolsystemofmachinetool Control system for controlling machine tool machining function by numerical control. Note 1. rewrite GB/T 26220-2010, definition 3.1. Note 2. The machine numerical control system generally includes the hardware device and the corresponding software. Machine CNC system mainly by the numerical control device (also known as the control unit), drive device (Motor drive unit and motor, sensor) and other components. CNC device is a major part of the machine tool CNC system, including microprocessors, transport (I/O) interface with communication, human-machine interface (display and keyboard), action button (key), etc. (and / Or circuits) and their corresponding control software. Note 3. Machine CNC system has a variety of classification methods. According to the different functions, machine numerical control system is usually divided into simple, high-performance and universal three; root According to the different application process, can be divided into two kinds of dedicated and universal numerical control system; according to the different forms of feedback control can be divided into open-loop control and closed-loop control Two kinds; according to the different processing control methods, can be divided into point control, linear control and contour control three. [JB/T 11989-2014, definition 2.1.3] 2.2 Reliability The ability of the numerical control system to complete the specified function within the specified conditions and within the specified time interval. Note. rewrite GB/T 2900.13-2008, defined 191-02-06. It is generally assumed that the CNC system is in the form of a function that can perform the required function at the beginning of the time interval state. In addition, although the value of reliability is objectively present, it is actually unknown and can only use limited sample observations, Of the statistical calculation of its estimated value. The magnitude of the reliability is also called reliability. [GB/T 29545-2013, definition 3.1] 2.3 Mean time between failures Meanoperating timebetweenfailures; MTBF Mathematical expectations of working hours between adjacent failures, also mean the average working time or average failure interval between adjacent two failures. Note. rewrite GB/T 2900.13-2008, defined 191-12-09. [GB/T 29545-2013, definition 3.3] 2.4 Stress Affect the numerical control system modules, components of the failure rate of electricity, heat, mechanical load. Note. rewrite GJB/Z35-1993, definition 3.4. CNC system to withstand the stress usually have many kinds, such as electrical stress, temperature stress, mechanical stress, etc.. a) electrical stress. refers to the components of the voltage/current and power; b) temperature stress. refers to the temperature of the working environment in which the components are located; c) mechanical stress. refers to the components of the direct load, pressure, shock, vibration, collision and drop; ......

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