Research On Methods For Collaborative Evolution Of Product Design Changes And Manufacturing Systems

In the manufacturing industry,the design and manufacturing capabilities of complex products are the core competitiveness of enterprises.In recent years,with the continuous increase of customer personalized requirements,product design changes will inevitably occur in the design and manufacturing process of complex products.There are many parts of complex mechanical products,and the correlation between parts is very complex.If one or part of the components change,it will lead to the change of the related components.Through the propagation effect,the change impact will affect many components,and the change of the components will affect the configuration and design of the manufacturing system.The more components affected by the change,the longer the response time and the higher the cost.How to accurately predict the impact of product design changes and make the manufacturing system respond effectively and quickly is an urgent problem for enterprises to deal with product design changes.Based on the in-depth study of product design change and manufacturing system design technology,and in view of the deficiencies in the current problem of collaborative evolution of product design change and manufacturing system,this paper studies the impact analysis of product design change and the method of collaborative evolution of manufacturing system.In order to enable enterprises to respond to the possible impact of product design changes in advance after accepting the change demand,and reduce the risk of "avalanche" caused by product design changes,this paper uses the design structure matrix modeling method to make quantitative prediction of the impact of product design changes,evaluate the change risk and make decisions on the change behavior according to the prediction results.In order to make the manufacturing system respond to product design changes accurately and quickly,the collaborative evolution method of product design changes and manufacturing systems is studied.The research contents of this paper are as follows:(1)Researched the analytical framework for collaborative evolution between product design changes and manufacturing systems.Firstly,based on the change patterns at different levels in product and manufacturing system design,a collaborative evolution analysis framework for product design changes and manufacturing systems is proposed.Secondly,a collaborative evolution model between product design changes and manufacturing systems was established through analysis from different perspectives.Finally,a collaborative evolution flowchart for product design changes and manufacturing systems was established.(2)The expression method of complex products is studied.Firstly,according to the hierarchy of complex product design process,the task-based DSM model,the functional structure-based DSM model and the component-based DSM model are established respectively.Secondly,the analysis method of DSM model is studied,which provides a model basis for predicting and analyzing the impact of product design changes.(3)The prediction method of the impact of product design changes is studied.Firstly,a low-level component DSM model for complex products is established by using the hierarchical method,and the influence range of product design changes is analyzed by combining the calendar method and the division method.Then,according to the propagation chain diagram and propagation tree of product design changes,a comprehensive risk matrix of product design changes is established,and the impact of complex product changes is quantitatively predicted,evaluated and analyzed,and compared with the comprehensive impact matrix and the decision criteria of part change impact,Make a decision on the acceptability of product design changes.It provides the design team with data support and decision-making basis for early planning.(4)The collaborative evolution of product design change and manufacturing system is studied.A method of ethnic group co-evolution is proposed,and the matrix mapping relationship between product features and machine features is established.Through matrix transformation,the machine family machines with high processing capacity and meeting the core features of various product variants in the manufacturing system can be determined.The manufacturing system composed of machine family machines and non-machine family machines can meet the production of all product features of the original product and its variants.(5)The research content of this paper is applied to the production practice of enterprises.Taking the product design change and manufacturing system response of an automobile engine cylinder block of a company as a case,the influence of product design change is predicted for the crank and connecting rod mechanism of the engine.According to the quantitative prediction results,the design change of the engine cylinder block is evaluated,analyzed and changed.The group coevolution method is used to select and sort the machine family machines of the manufacturing system.The synthetic manufacturing system can meet the production requirements of the original product and its variants at the same time,which proves the effectiveness of the product design change and manufacturing system coevolution method.To sum up,this paper proposes a method of collaborative evolution of product design change impact analysis and manufacturing system,in order to improve the scientificity and efficiency of product design change decision and manufacturing system response,and at the same time provides a new research idea for complex mechanical product manufacturing system design.