Adaptability-oriented Product Platform Planning Of Bridge Crane

With the development of global industrialization, as an important tools and equipmentfor the realization of mechanization and automation in the process of modern industrialproduce, bridge crane has been developing rapidly. The bridge crane structure is complex,type is diversity, the grade of series characteristics is not obvious and custom area wide, inaddition to, Customer demand for crane design is fast and high quality. Those characteristics,makes the design of the crane usually harder than other similar machinery products. For rapidresponse to market changes, shorten the bridge crane design and production period and reducethe cost, This paper combined with modern design theory and method develop the designplatform of bridge crane to realize rapid configuration. The main research content is asfollows:(1) Adaptability-oriented modeling and analysis of functional requirements for productplatform. The customer needs are transformed into functional requirements, productfunctional requirements are classified into basic functional requirements, expectablefunctional requirements and adjunctive functional requirements based on Kano model, andtheir concept are defined. The functional requirements and the semantic of product functionare expressed with metamodel based on the theory of axiomatic design and general designtheory, and selecting the structure of corresponding function formed the space of structureconcept. The function requirements are zigzagging mapping to design parameters, and thedesign matrix is created. Selecting the design parameter that meet basic functionalrequirements and constraint formed the space of basic structure. The design parameters areapplied to determine the sharing strategy of product platform, by analyzing the fluencyrelationship between functional requirement and design parameter and the sensitivity of theproduct platform parameters. This method of product platform design is validated by a casestudy of electro-hydraulic dram brake design.(2) Adaptability-oriented parametric design of product platform. To meet customers’personalized, diverse and flexible requirements of cranes preferably, an adaptability-orientedparametric design method for the crane product was proposed. Regarding the drum as object,in the process of parametric design, the structure and the design characteristics of the drumswere analyzed to extract the characteristic design parameters firstly. Then Solidworks wereused as a modeling tool and a new structure and a part were generated by modifying thegeometric parameters and the size parameters of the model. And then Ansys were used forcarrying out finite element analysis on the stability of drums. At last the more reasonable wallthickness of drums was obtained. Based on this, using VB language and combining with othersoftware interface technology, develop parameterized adaptable platform of drum, and therefore the purpose of adapting to various requirements of the customers fast can beachieved.(3) Bridge crane configuration module partition and building the product configurationplatform construction. Combining with the structure characteristics of bridge crane, build thestructure-function mapping. On the reasonable module partition, establish various modules of3D parametric model library and parameter database. Using Solidworks and VB6.0andcombining with Database technology, develop the product configuration platform of bridgecrane.The results show that: design platform of bridge crane realize rapidly configuration, andnot only meet the diverse requirements of customers for product, but also do some help forthe enterprise for the requirements of low-cost, which achieve the diversity requirements andcan fast respond to the customer. Its implementation can effectively suppress waste ofresources and enhance the design efficiency.