复杂机械协同优化设计的规划策略研究

为高效地实现复杂机械产品的协同优化,提出了一种协同优化进程规划策略,该规划包含求解进程规划和分解建模规划两个核心环节。制定规划的根据是产品模型的特征,包括模型中包含的节点类型、节点之间的依赖层次、节点之间的相关强度、节点内部性能属性之间的交叉强度、模型的相对计算量和模型的优化难度等。基于相关特征给出了相应的求解进程规划准则、分解建模规划的目标和约束,从而为复杂系统的协同优化提供了一种新的有效的实施策略。该研究成果在挖掘机优化设计中得到了成功的应用。     

工艺规划为核心的产品协同研发生产平台

为实现具有市场竞争力产品的高端研发,并具备较高的质量及成本控制能力,文中提出构建以工艺规划为核心的产品数字化研发生产平台的解决思路.平台框架包含计算机辅助设计、产品数据管理、计算机辅助工艺规划和协同制造模块;通过工艺与设计、生产两端的数据共享,实现设计、工艺数据和生产的高效协同;通过工艺规划方案的功能描述,展现了一个为...     

面向大规模客户化生产的产品设计及其产品规划方法研究

介绍了大规模客户化生产模式的内涵、特点及实施策略。在产品系列合理化和零部件标准化及规范化的基础上详细分析了面向大规模客户化生产的产品设计方法。提出了基于产品族的产品规划方法。首先 ,利用模糊聚类分析划分客户群 ,并对客户群需求进行综合评定。进而针对客户群需求 ,实施了基于大规模客户化生产的质量功能配置转换 ,对产品族进行了功能规划、解原理规划、结构规划 ,并确定其产品定制参数及定制范围。最后通过建立产品族的成本模型 ,对产品目标成本进行合理预测。     

网络化协同产品定制及其系统集成研究

针对当前网络化产品定制系统存在的主要问题，提出了一种网络化协同产品定制模式。该模式通过客户与企业协同的网络化产品定制过程，使制造企业能在全球范围内快速满足客户的多样化需求、充分发挥客户的创造性；通过与企业相关环节的系统集成，可以实现整个企业以客户需求为驱动的协调运行和资源共享。提出了网络化协同产品定制运行模式与组织模型，并给出了支持多种定制方式的客户需求定义方案。基于所提出的网络化协同产品定制运行模式，进行了系统集成研究，提出了一种J2EE平台下基于XML连接器的系统集成解决方案。     

基于目标成本约束的机械产品配置研究

企业经营必然需要获取一定的利润以持续发展,而客户的个性化、多样化需求与企业批量化和标准化生产无疑成为一种矛盾.因此研究在目标成本约束下的产品配置模型和方法,以最低的成本,最快的速度配置出可让客户满意的产品具有重要的实用价值.虽然产品设计过程中,冲突是不可避免的,而研究冲突的消解策略,对于改进产品设计和提高企业效益都具有重要意义.     

Configurable product design considering the transition of multi-hierarchical models

The current research of configurable product design mainly focuses on how to convert a predefined set of components into a valid set of product structures. With the scale and complexity of configurable products increasing, the interdependencies between customer demands and product structures grow up as well. The result is that existing product structures fails to satisfy the individual customer requirements and hence product variants are needed. This paper is aimed to build a bridge between customer demands and product structures in order to make demand-driven fast response design feasible. First of all, multi-hierarchical models of configurable product design are established with customer demand model, technical requirement model and product structure model. Then, the transition of multi-hierarchical models among customer demand model, technical requirement model and product structure model is solved with fuzzy analytic hierarchy process (FAHP) and the algorithm of multi-level matching. Finally, optimal structure according to the customer demands is obtained with the calculation of Euclidean distance and similarity of some cases. In practice, the configuration design of a clamping unit of injection molding machine successfully performs an optimal search strategy for the product variants with reasonable satisfaction to individual customer demands. The proposed method can automatically generate a configuration design with better alternatives for each product structures, and shorten the time of finding the configuration of a product.     

A hybrid rough-cut process planning for quality

This paper proposes a hybrid approach to develop a rough-cut process planning for quality. The approach aims to determine key process alternatives with an adequate process capability by systematic quality planning and assessment methods during the initial planning stage of the product development cycle. It consists of four steps: (1) identification of quality characteristics (2) planning of the process quality by combining quality function deployment (QFD) with the process failure mode and effect analysis (FMEA) (3) a selection of process alternatives, and (4) an assessment of process quality through a quality measure index, called the composite process capability (CCP). The process alternatives with an adequate CCP selected during the early design stage can then be not only used as the guidelines for detailed process planning but also as feedback for the product design and other functions for design evaluation and improvement. This approach is helpful to reduce or even eliminate the iterations of modification of process plans. A prototype system called the rough-cut process planning for quality (RPPFQ) has been developed for validation. A case study concerned with a satellite frame part is presented to illustrate the approach and prototype system in this paper.     

航空产品异地并行研制协同工作平台构建与实施应用

结合航空领域产品研制,从异地产品并行联合研制过程中信息化技术应用的角度,分析了从设计到制造过程中业务协同的技术原理及主要内容,并且对制造端开展异地业务协同工作的几个关键点进行了深入剖析,对支撑制造端开展异地业务协同必须依托的协同工作平台的构建原理、主要功能及关键技术应用进行了重点阐述,具有较强的实用价值,对其他行业领域开展异地产品联合研制具有实际指导作用。     

Applying CBR to machine tool product configuration design oriented to customer requirements

Product customization is a trend in the current market-oriented manufacturing environment. However, deduction from customer requirements to design results and evaluation of design alternatives are still heavily reliant on the designer’s experience and knowledge. To solve the problem of fuzziness and uncertainty of customer requirements in product configuration, an analysis method based on the grey rough model is presented. The customer requirements can be converted into technical characteristics effectively. In addition, an optimization decision model for product planning is established to help the enterprises select the key technical characteristics under the constraints of cost and time to serve the customer to maximal satisfaction. A new case retrieval approach that combines the self-organizing map and fuzzy similarity priority ratio method is proposed in case-based design. The self-organizing map can reduce the retrieval range and increase the retrieval efficiency, and the fuzzy similarity priority ratio method can evaluate the similarity of cases comprehensively. To ensure that the final case has the best overall performance, an evaluation method of similar cases based on grey correlation analysis is proposed to evaluate similar cases to select the most suitable case. Furthermore, a computer-aided system is developed using MATLAB GUI to assist the product configuration design. The actual example and result on an ETC series machine tool product show that the proposed method is effective, rapid and accurate in the process of product configuration. The proposed methodology provides a detailed instruction for the product configuration design oriented to customer requirements.     

面向大批量定制的用户需求协同配置思想及其应用

面向大批量定制的设计(DFMC)是大批量定制研究和实施的关键技术之一。现有的DFMC模式的重要特点之一在于产品的设计和制造会受到用户订单的极大限制,从而使得企业的制造属性难以实现优化。为此提出了面向大批量定制的用户需求协同配置思想。其内涵在于用户需求参数与企业的产品设计、制造以及生产经营等参数具有密切关系,而用户需求通常都具有相当的变动范围。因此,通过用户与企业集成以及协调用户需求参数与企业的制造参数,就可以实现各参数的综合优化,从而提高用户满意度和企业效益。建立了用户需求协同配置的多目标优化模型,提出了网络化运行模式及一种实现方案。通过工程应用实例说明了用户需求协同配置的成功应用。     

锻造企业有限产能计划系统的研究与实现

针对锻造企业多品种小批量、单件生产、工艺总体流程固定、面向订单等特点,设计计划系统基本流程,制定基于产品结构、工艺过程等数据信息的能力需求计划,在基本流程基础上建立有限产能下推拉相结合的生产计划与控制模型,运用成组技术原理建立相似度系数对计划进行优化,减少工序制造调整时间,从而提高生产效率,保证交货欺,最大限度满足客户的需求。     

Reverse simulation for collaborative commerce: A study of integrating object-oriented database technology with object-oriented simulator

Collaborative commerce has been used for communication, design, planning, information sharing, and information discovery in business-to-business (B2B) applications. The collaboration between buyers and sellers enhances product quality and customer satisfaction. However, most effort currently focuses on information sharing with customers and suppliers instead of joint product development or manufacturing. Moreover, traditional analytical methods have limited capability in solving problems. This study presents a framework for doing reverse simulation, where designers can reuse past experiments and change system parameters in manufacturing system for collaborative commerce. The framework integrates the object-oriented simulator and the object-oriented database. In this framework, the object-oriented database records the whole experiment scenarios and allows multiple planners with different expertise to involve concurrently and collaboratively. Then, simulations of advanced planning and scheduling in a product manufacturing environment that involves several planners working collaboratively are used for demonstration.     

锻造企业有限产能计划系统的研究与实现

针对锻造企业多品种小批量、单件生产、工艺总体流程固定、面向订单等特点,设计计划系统基本流程,制定基于产品结构、工艺过程等数据信息的能力需求计划,在基本流程基础上建立有限产能下推拉相结合的生产计划与控制模型,运用成组技术原理建立相似度系数对计划进行优化,减少工序制造调整时间,从而提高生产效率,保证交货欺,最大限度满足客户的需求.     

协同设计在摩托车行业的研究与应用

阐述了在当今制造企业设计方面的需求,介绍了整车厂与配套厂之间利用基于协同平台模式的协同设计服务平台进行产品开发的应用模式,图解说明了企业之间进行交互协作的业务流程;概述了协同设计平台的功能设计以及平台开发的技术架构。     

基于发明问题解决理论的客户协同产品创新设计方法

为提高产品创新效率,提出了基于发明问题解决理论的客户协同产品创新设计方法。定义了客户知识生命周期和客户知识产品化的概念,建立了面向客户知识利用的协同产品创新框架。对所提出的基于发明问题解决理论的客户协同创新方法进行了研究。最后,建立了基于发明问题解决理论的客户协同创新设计原型系统,并以摩托车车架的创新设计过程为例讨论了所提方法的正确性和有效性。     

QFD based optimal process quality planning

Process quality planning is an important activity of quality assurance. It aims to determine manufacturing processes with appropriate process capability to produce product characteristics. Quality function deployment (QFD) is a powerful tool for quality planning, which starts with identifying customer needs and ends with determining process plans. However, most studies on quality planning by QFD are limited to the product planning stage. The approach to process quality planning through QFD has rarely been discussed. This paper adopts the optimal QFD model and further develops it for process quality planning. By incorporating an empirical capability function for process elements, a composite process capability index (CCp) is presented to reflect the overall process quality level. Constraints including technical feasibility, correlations among process elements, project budget and development time are considered. A case study of the numerical control (NC) machining process quality for a thin-walled complex window frame of airship is given to illustrate how the proposed model can be effectively applied by process quality team to determine the optimal target level of process elements concerning with resources utilization .     

注塑产品与模具协同设计任务规划算法研究

协同设计支持多功能小组兆同参与一个产品的设计过程,在产品开发的初始阶段,合理的任务规划将有利于协同设计的顺利进行,从而提高设计效率与质量。对协同设计任务规划系统开发的关键技术进行研究,采用模糊设计结构矩阵描述设计子任务的耦合关系,提出了新的模糊排序算法指导设计过程的分解与重组;基于综合能力、兴趣和时间约束分配设计任务,并根据协同设计过程的并行度与耦合度测定,提出了新的协同设计任务调度的时间分配策略。最后以注塑产品及模具协同设计为对象进行了验证。     

Exploring barriers and opportunities in adopting crowdsourcing based new product development in manufacturing SMEs

Crowdsourcing is an innovative business practice of obtaining needed services, ideas, or content or even funds by soliciting contributions from a large group of people(the ‘Crowd'). The potential benefits of utilizing crowdsourcing in product design are well-documented, but little research exists on what are the barriers and opportunities in adopting crowdsourcing in new product development(NPD) of manufacturing SMEs. In order to answer the above questions, a Proof of Market study is carried out on crowdsourcing-based product design under an Innovate UK funded Smart project, which aims at identifying the needs, challenges and future development opportunities associated with adopting crowdsourcing strategies for NPD. The research findings from this study are reported here and can be used to guide future development of crowdsourcing-based collaborative design methods and tools and provide some practical references for industry to adopt this new and emerging collaborative design method in their business.     

A STEP AP224 agent-based early manufacturability assessment environment using XML

Early design assessment activities have a significant impact on reducing the cost of manufacture. The efficient utilisation of the product development time and the level of coordination of the early design activities between the major stakeholders are becoming key factors for success in manufacturing today. The paper reports on a new distributed early design manufacturability assessment methodology using collaborative autonomous agents. A product data model compliant with STEP AP224 and corresponding process and facility data models are proposed to support the decision-making process. XML was used as a medium for exchange of requests and information between design, manufacturing, and facility planning agents. A prototype Web-enabled system for rapid product manufacturability assessment in the extended enterprise has been developed using distributed multi-agent CORBA objects. The reported research is a step towards the development of a generic prototype tool for collaborative design evaluation and rapid assessment of the manufacturing feasibility and resource availability at different stages of the product development process.     

模糊回归理论在QFD系统建模中的应用研究

针对QFD规划过程的内在模糊性,把模糊回归理沦应用于QFD的规划过程,建立了确定顾客需求与工程特性之间的关联函数及工程特性之间自相关函数的数学方法,进而建立了一个QFD的产品规划模型。该方法适合于各种工程设计问题,尤其是在不确定的、模糊的条件下,能够有效地确定关联函数及自相关函数,帮助开发人员优化顾客需求的满意水平,使顾客对产品满意度最大。