3D Parametric Modeling for Complex Parts GenerationA 3D parametric model is an intelligent part that uses parameters to drive the geometryDirected Acyclic Graph 1IManE 2013 International Conference Constantin tan1!"0#"1$DAG%eatures &ith parameters'&o modeling levels(2IManE 2013 International Conference Constantin tan1!"0#"1$%eature()s*etch+ prism+ ri,+ s&eep)parameters'opological()com,ine feature)-lletssimple modelscomple. models'he strategy for 3D parametric modelingfor comple. part/alance from feature to topological level0) 1se very simple features &ith fe& parameters0) 'he model form is made topological+ com,ine simple feature) 'he topological graph is order in a technological mannertarting line'he only solid feature used for modelling is pad3IManE 2013 International Conference Constantin tan1!"0#"1$Com,ine t&o ad2acent solids+ ma*e the -llet'he strategy for 3D parametric modelingfor comple. part!IManE 2013 International Conference Constantin tan1!"0#"1$'he strategy for 3D parametric modelingfor comple. part%inal model &ith t&o faces modi-ed $IManE 2013 International Conference Constantin tan1!"0#"1$'he strategy for 3D parametric modelingfor comple. partAdvantages()'he model is 3e.i,le and very easy to modify,ecause the comple.ity is push to&ards topology0)graph structure comprehensi,le for many users0)'he model depends only,y entrees data+ not from s*etches or limit plane0) the strategy is adapted for automation0Disadvantages()can not ,e applied for revolution parts is adapted for milling parts0)is not suita,le for comple. surfaces made ,y multiples tangent faces04IManE 2013 International Conference Constantin tan1!"0#"1$