Developing On System Of Computer Aided Design Of Agricultural Machinery

According to the present research situation and actual requirement of Computer Aided Design(CAD) at home and abroad, This paper fully utilizes the component development method, During the design of Rice-Seedling Exactitude Planting Machine of Electrical and Pneumatic Controlling ,sets up the mathematical model of parts ,using the universal software advantage ,such as AutoCAD , 3DMAX etc . and combining the mainstream computer technology ,such as DirectX, XML etc ;makes sort , coding , save ,search and maintenance to data using XML file ;It sets up a three-dimensional editor to produce components and be able to control the visual spot and compression & expansion of the components easily ,by adopting interface technology of DirectX 9 For Visual Basic Type Library, and utilizing the special function of Direct3DRM; It develops additional controls and make the three-dimensional effect true, utilizing the strong function of ActiveX in the Visual Basic(VB); It constructs a better interactive interface and successfully carries out the interactive function of picture or animation. To be a universal software table, it gives us an efficient, simple and cheap solution to the product design and development, and advances the product integrated competition on develop periods, quality, cost and service, and so on. This software can be used to engineering design, simulation and Computer Aided Instruction (CAI).