【作者】 李娟；

【导师】 陈晓慧；

【作者基本信息】 重庆大学 ， 机械工程（工业工程）， 2017， 硕士

【摘要】 产品是制造过程的输出,产品的可靠性形成于制造环节,制造系统的可靠性是保证和提高产品可靠性的重要基础。高可靠性的产品也被认为是高质量的过程和高度可靠性的制造系统共同的输出结果,故对制造过程中影响制造系统性能的关键要素进行优化分析是确保产品可靠性的重要途径。产品制造过程中蕴藏了丰富的信息,制造系统可靠性的分析往往更倾向于利用系统运行故障数据进行系统性能诊断,忽略了信息间的关联性影响,造成了信息的浪费。本文基于制造过程中的大量信息,从制造过程中产品可靠性保证角度出发,利用信息之间的相关关系来构建制造系统可靠性模型,辅以维护决策,提高产品可靠性。本论文的主要研究工作如下:(1)传统的针对产品可靠性的研究多集中于可靠性设计、使用等阶段,很少从制造过程产品可靠性的保障技术展开系统性的研究。基于此,本文从制造过程产品可靠性保证角度出发,对制造过程中交错复杂的质量与可靠性等相关信息加以辨识,并在分析了制造过程中产品质量、产品可靠性与制造系统可靠性之间关联关系的基础上,从“制造系统-制造过程-产品”维度上拓展延伸了QR链,为后续的研究分析奠定基础。(2)基于运行故障数据的制造系统可靠性评估是最常见的分析方式,但是在实际工业生产中,造成制造系统停机的原因不仅仅是由于制造系统自身组件的故障失效,也会受到退化系统所产生的不一致性或不合格产品的影响。然而,以往的研究中质量与可靠性经常是独立分开研究的,且由于难以量化两者之间的影响关系,故对制造系统可靠性的分析很少考虑到产品质量的影响,且弱化了要素性能衰退的影响。本文则是将产品质量因素纳入制造系统可靠性的范畴,有效整合相关的产品质量信息与制造系统可靠性信息,通过量化质量因素的影响以及增加对性能衰退的影响分析来对制造系统可靠性进行评估,并从求解维度上做了一定的优化。(3)最后,通过FFZD4005滚珠丝杠制造加工的案例对本文方法进行了验证,通过关键产品特性的确定,逐步构建制造系统可靠性模型,并通过预测制造系统可靠性随生产周期变化而变化的衰减规律,辅以制定维护决策。通过本文的研究,提出了一种适用于制造系统可靠性的分析方法,为从制造过程产品可靠性保障技术的研究提供了一定的思路。更多还原

【Abstract】 Manufacturing system reliability is an important basis to ensure and improve product quality and reliability.Generally,product is the output of the manufacturing process,and the reliability of the product is formed in the manufacturing process.So high reliability products are generally considered to be the common outputs of high quality processes and highly reliable manufacturing systems.Therefore,the optimizing analysis of the key factors that affect the performance of the manufacturing system is an important way to ensure the reliability of the product.As is known,a large amount of information have been generated in the manufacturing process.While the reliability analysis of manufacturing system tends to be more likely to use the running fault data for system performance diagnostics,which ignores the correlation between information,resulting in a waste of information.Therefore,based on the correlation of information,this paper built the reliability model of manufacturing system from the reliability assurance of product manufacturing process,which assists to make maintenance decision and improves product reliability.The main research work of this paper are as follows:(1)The traditional research on product reliability is mainly focused on the reliability design,usage,etc.While there is little systematic research on reliability assurance technology of manufacturing process.Therefore,this paper extends the QR chain from a manufacturing perspective,based on identifying the complex quality and reliability information in the manufacturing process.And then the relationship between product quality and system reliability is analyzed,which lays the foundation for subsequent research.(2)The common system reliability analysis method is usually based on the running fault data.But in the actual industrial production,the shutdown of the manufacturing system is not only due to the failure of the system components,but also to the nonconforming product produced by the degraded system.However,most researches about quality and reliability are separately because of the difficulty of quantifying the relationship between them,so the analysis of the reliability of the manufacturing system seldom takes into account the influence of the product quality as well as weakening the impact of performance degradation.In this paper,the quality factors are included to evaluate the system reliability by effectively integrating related product quality information and system reliability information through quantifying the impact of quality factors and enhancing the performance degradation analysis.(3)Finally,the method was verified by the case of FFZD4005 ball screw manufacturing.Through the determination of key product characteristics,the system reliability model is built.So the conclusion was drawn by the attenuation rule of system reliability varies with the production cycle that system reliability was overestimated regardless of the interaction between quality and reliability.In this paper,a method suitable for manufacturing system reliability analysis was proposed.The research results show that this method has a better application effect,which provides some ideas for the research of reliability assurance technology in manufacturing process.更多还原