基于MBD的船用柴油機裝配信息定義技術(shù)研究
[Abstract]:Marine diesel engine is a typical complex product, which has the characteristics of large volume, complex structure, many parts and so on. Compared with the traditional product assembly, the marine diesel engine has the characteristics of high assembly precision and manual operation in the assembly process. The assembly process occupies a large proportion in the whole manufacturing process. At present, the domestic marine diesel engine assembly process design generally adopts the two-dimensional design and manufacture mode, its information transmission depends on the two-dimensional pattern, the field workers need a lot of time to understand the information on the drawings, resulting in a high rate of rework. The problem of inefficient production. Therefore, the research of marine diesel engine assembly information definition technology based on MBD can promote the development of marine diesel engine in China and support the development of modern manufacturing technology. The main research contents and results are as follows: (1) according to the problem of information expression of assembly model in different stages of assembly, the assembly model of marine diesel engine is divided into engineering MBD model and process MBD model by using a new information definition method. The assembly MBD data set and its functions in different manufacturing stages are analyzed, and its information content is classified and organized to change the mode of information transmission in the current design process and improve the efficiency of 3D assembly process planning. At the same time, it plays an important role in improving the existing design and manufacturing mode. (2) aiming at the problem that the definition of marine diesel engine assembly MBD data set lacks the application specification of 3D digital definition at present, the application frame of MBD technology is established. On the basis of fully understanding the existing MBD technical standards, combined with the actual requirements of marine diesel engine assembly information definition, The application specification system of MBD technology is established to guide the manufacture of this kind of products. (3) the object modeling of assembly process information model is studied according to the information organization requirement of 3D assembly process design of marine diesel engine. According to the product 3D visual assembly process planning, the functional model of product assembly process planning is constructed under the integrated environment, and the information elements contained therein are analyzed in detail. The information expression mechanism based on MBD technology is constructed. (4) based on the theoretical analysis, a digital definition system of assembly information is developed according to the actual requirement of information definition in the process of marine diesel engine assembly process design. The system runs on the platform of 3D assembly process planning and simulation. Taking the assembly process design of cylinder head parts of a diesel engine as an example, the practicability and reliability of the assembly information definition system are verified. It lays a foundation for the 3D design and manufacture mode of this kind of products, and also makes a beneficial exploration for the application of MBD technology.
【學位授予單位】:江蘇科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:U664.121;TG95
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