Research of 3D Parametric design system of gear based on SolidWorks

General flow of 3D parametric design was put forward according to the characters of gear design in this study. There are three key modules, which include parameters designing calculation of gear, automatic generation of 3D parametric model of gear and automatic generation of gear part drawing, and corresponding solutions were also provided. In final an example verifies the feasibility of the method. 3D parametric design system is one of efficient and reliable modern machine design techniques. The efficiency of gear designing can be greatly enhanced by adopting 3D parametric design system, and meet the needs of modern machine design. In addition, this study gives a use for reference to 3D parametric design system for other parts.