| 1．INTRODUCTIONRecent years, with rapid development of information technique, electronic technique and mechanical technique, Many performances of NC lathe, such as rotational speed, fast moving speed, controlling axis number, exchanging tool time and resolving power have gotten some improvement. However reliability is one of primary problems puzzling NC lathe development. NC lathe occur faults frequently, so it is unable to accomplish required performance and play a secure role in economic development and defense construction, thus NC lathe lose its advanced capability.Enhancing NC lathe reliability has become the key of survival and development for machine tool building corporation. Today machine tool market compete drastically, it is higher reliability NC lathe that can get consumer favor. Though consumers pay attention to advanced performance, they even pay attention to holding of advanced performance, i.e. reliability. Because of the whole reliability level of homemade NC lathe not to be compared with the import product, it affects its at the good reputation in the customer with the trustful of degree, impacts seriously the development of our national NC equipment. Therefore ,quickly increasing the reliability of NC lathe is a problem for urgently needing the solution. This thesis is just put forward under this kind of background .it is a part of development plan of national high-tech research(863 Progrom)-key technic development and application of reliability of NC equipment and its system.Regard NC lathe as project background, to face cocurrent engineering and the whole life cyclr project NC lathe reliability technology and its information system carry on research,and apply to the homemade NC lathe , enhance MTBF of the products(Mean Time Between Failures)close to the international most advanced level.2．CONCURRENT ENGINEERING-ORIENTED NC LATHE RELIABILITY PROJECT Concurrent engineering is a kind of product development mode appearing newly in recent years, it receives the attention of numerous domestic and international research units and manufacturing company. Concurrent engineering is the systematized methods to design products and its relevant courses concurrent and integrately. It requires that products developer should consider various kinds of factors in the cycle of the life of the products at the beginning of design. Its important purpose is to shorten the exploitation cycle of products and improve product quality, reduce the cost of products, thus strengthen the competitive power of enterprises.This paper has analysed the reliability work of the whole life cycle of NC lathe, and proposed that reliability work is to oriente the whole of life cycle of NC lathe. Because cocurrent engineering is to oriente the whole life cycle of products, too, I have put forward the thought of reliability analysing about concurrent engineering-oriented NC lathe. I have fully analysed the relation between reliability project and main technologies in NC lathe cocurrent engineering environment. they reflect the thought of reliability analysing in cocurrent engineering-oriented NC lathe. On the basis of the thought of reliability analysing about concurrent engineering-oriented NC lathe . I have improved and perfected the reliability controlling model about concurrent engineering-oriented NC lathe..For benefit reliability analysing of NC lathe, according to this control analysis of model, I have put forward concepts of progressive reliability analysis, I apply nerve cell in reliability analysis of NC lathe, and set up some concepts and basic methods about function resolve and recombinate of NC lathe For carry on l fault analysis of NC lathe, based on function resolve and recombinate of NC lathe I put forward fault mode effect analysis of concurrent engineering-oriented NC lathe.3．RELIABILITY APPRAISAL SYSTEM OF NC LATHECombining with a large number of failure data of some serial NC lathe that credibility research institute collected during '863' Program, the author carries on the research of NC lathe...
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