机电产品主动再制造寿命匹配方法的研究

发布时间：2018-01-13 04:17

本文关键词：机电产品主动再制造寿命匹配方法的研究　出处：《合肥工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：进入21世纪,构建循环经济、保护地球环境资源、实现可持续发展已经成为世界各国共同关心的话题,再制造作为循环经济发展模式的一项重要技术途径,具有重大的研究意义。本文针对目前再制造毛坯存在的不确定性,以及再制造技术发展瓶颈难以克服等问题提出了主动再制造寿命匹配的概念,并重点研究了零件层主动再制造时机的确定、具体的主动再制造寿命匹配方法、以及基于主动再制造寿命匹配的优化设计方法等。首先,阐述了主动再制造的概念,对产品服役特性进行分析,验证了主动再制造时机存在的客观性。通过对零部件设计、服役、再制造三个阶段性能变化规律进行分析,基于冗余强度构建了冗余因子计算模型,并依据再制造冗余因子的取值范围得到了零部件的主动再制造时机。其次,对产品中零部件之间的关系进行分析,构建了具体的主动再制造寿命匹配方法；以产品中耐用的关键件为对象,基于质量功能展开的方法选取了相对产品特性重要度较高的关键件为基准,根据与基准主动再制造时机相差大小选取相等或者倍数的匹配关系。最后,为了实现主动再制造时机相等或者倍数的关系,构建了基于主动再制造寿命匹配的优化设计方法,即以设计参数为自变量,服役特性为因变量,建立了之间的映射模型,通过将需要的特性带入该模型中可以得到对应的设计参数,实现了主动再制造时机的主动调控。以6L240型号四缸柴油机连杆与曲轴为例,对以上研究进行了验证。确定了曲轴与连杆的主动再制造时机,建立了连杆杆身厚度和小端过渡圆角半径与疲劳寿命的映射关系,通过优化连杆的初始设计参数实现了以曲轴为基准的二倍寿命匹配。
[Abstract]:In twenty-first Century, the construction of circular economy, protect the earth's environment resources, achieve sustainable development has become a common concern topic all over the world, re manufacturing as an important way of recycling economy development model, which has great significance. Aiming at the uncertainty of remanufacturing blank, and difficult to overcome the bottleneck of the development of remanufacturing technology put forward the concept of remanufacturing, active life, and focus on the parts remanufacturing time to determine the active layer, active remanufacturing life matching method in detail, and based on the main dynamic optimal design of remanufacturing method of life, and so on. Firstly, expounds the concept of active remanufacturing, the product service characteristics are analyzed. To verify the objectivity of the existence of active and manufacturing time. Through the service of parts of the design, manufacturing, and the three stage performance variation analysis, The construction of redundant strength redundancy factor based on the calculation model, the range and on the basis of remanufacturing has been active and redundant factor parts manufacturing time. Secondly, the relationship between components analysis, construct a specific active remanufacturing life matching method; to product key parts and durable as the object, method based on the quality function selects key pieces of relatively high degree of important product characteristics as the base, according to the matching relation with the reference time difference of active remanufacturing size equal to or multiples. Finally, in order to realize the relationship between active remanufacturing equal opportunity or expansion of the construction optimization design method for active remanufacturing life matching based on the design parameters as independent variables, service characteristics as the dependent variable, the mapping model was established between the characteristics through will require the model to get into The corresponding design parameters, realize the active control of active remanufacturing time. Based on 6L240 type four cylinder diesel engine connecting rod and crankshaft as an example, the above research is validated. The crankshaft and connecting rod active and manufacturing time, mapping of connecting rod small end thickness and fillet radius and fatigue life through the optimization of design parameters, the initial link to achieve matching life two times with crankshaft as the benchmark.

【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH16

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