The key issues about the web ~based digital collaborative product development platform are discussed, and the platform’s architecture is presented. Three key technologies of platform—collaborative product data management (CPDM) , design process integration on the level of fine granularity and the tools for collaborative design are studied and implemented. The prototype system and its applications are introduced.
A design structure matrix (DSM) is presented as a method of process modeling, and hierarchy structure of DSM is discussed. The DSM is analyzed and improved based on the graphic knowledge. The process modeling and implementation system are built based on workflow model and CORBA distributed operation protocols, and applied in the overall concept design process of satellite.
Based on the approach to the features of intelligent IETM requirements analysis, this paper is basically comprised of common requirements and specific requirements of intelligent IETM, in which, the fundamental requirements of common requirements is presented while user group, user activity, user operation method, operation frequency and operation proficiency are included to be emphasized as main concerns in the procedure of specific requirements analysis. Consequently, this paper will put forward a model of intelligents IETMrequirements analysis based on the requirements classification.
The application of VPD technology in missile propulsion system is introduced. The key technolgies including virtual modeling, flow field analysis, finite element analysis, virtual assembly and virtual machining are discussed. It is proved that VPD technology can shorten the product design period and reduce the design and manufacturing cost. VPD is the development trend of the advanced manufacturing technology.
according to the manufacturing process of an aircraft vertical stabilizer. And on the basis of assembly process of the aircraft component, simulation of its assembly process is completed, and assembly feasibility is visually analyzed. By using the results of the simulation, analysis and evaluation of human - machine factors, the adjustment, improvement and optimization are implemented for assembly methodology, fixture and process layout, and so that manufacture quality and productivity are improved.
The causes for brittle fracture during the assembly and service of galvanized steel bolts are analyzed from materials, heat treatment process and surface treatment process. The effect of the hydrogen deposition and infiltration during galvanizing on the brittle fracture of steel bolts is emphatically analyzed in order to take necessary measures in the respects of selected materials, manufacturing process control and so on to reduce the hydrogen adsorption and osmotic pressure on parts surfaces, decrease their sensitivity to hydrogen embrittlement and effectively prevent the brittle fracture of galvanized steel bolts.
