Design And Implementation Of Digital Assembly System Based On Three-dimensional Model

Digital assembly technology has received the widespread attention recent years.It can create a virtual environment on a computer during the design phase of products,simulate and analyze products assembling process,evaluate assembling programme rapidly,verify and improve the assembling process to promote assembling efficiency,ensure early detection of problems that may occur in the process of assembling, and timely assembly information feedback to designers, so as to improved product quality, shorten development cycles and reduce development costs.According to the characteristics of digital assembly technology,this article studied the design and implementation of digital assembly system.It focuses on assembly process information modeling, structure design of assembling mapping data sets and integrated sharing technology,analyzed the expression of assembly process information based on the three-dimensional model, realized the management of the assembly process information, and established visualization model of technology information.Finally,developed digital assembly system on the basis of assembly process information modeling and integrated shared technology, implemented the assembly information management and the conversion of information model and so on.The essay carried out detailed research mainly from the following aspects:1.The technology of large assembly realization in the assembly process design system is required in high level,to a great extent,the generation efficiency of product assembly sequence,depends on the level of the product assembly tree structure, and the division of reasonable sub product assembly is the base of hierarchy tree of products.2.The particle size of assembly parts controlled by system and components under the root node of assembly structure can define their disassembly activities, other components, unless be removed to the root node, otherwise, can’t take part in remove activities independently.3.Define assembly by disassembly, assembly process object is completely designed product, it’s simple and feasible because the assembly is the inverse process of disassembly, and we don’t have to consider the accurate positioning of removing.This system supports seven sports definition including linear,rotating,spiral,translation,traction,radial,circumferential,and it can display assembly trajectory path.4.The system provides the means such as cutting,wire frame,local amplification.In order to enhance the description of the assembly process, improve the maneuver ability of the assembly simulation and practical, it also supports tags,assembly dimension measuring,text,image,sequence number mark,BOM form, arrow,and all kinds of technology illustrations.