| Parametric design is an important aspect of Computer Aided Design field,and its technology has developed completely nowadays. It has a wide usage in popular 3D CAD software. However, because of its generality not facing material product, this is only an application at the bottom of parametric design. Parametric design of material product in CAD is not only the final goal, but also an application at the top of its technology. This is just the content of this paper.Firstly, on the basis of fundemental method of parametric design and parametric function in popular CAD system, the parametric compound method is put forward in this paper, which combines 3D modeling with programming in SolidWorks platforms.Secondly, the modeling means using mainly top-down modeling and subsidiarily down-top modeling is applied creatively, and controlling codes are programmed through applying API and VBA in SolidWorks.Finally, 3D parametric CAD system is developed for Sliding-plug door of railway vehicles, and it has got an effective application in enterprises. |
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