Exploitation And Research On AUTOCAD Advanced Development For Pressure Vessel 3D Design

The development of CAD technology has affected every phase in the process of industrial product design, and this brought great changes to traditional design method.Broadly used in chemistry, petrochemistry and other industries as an important equipment, pressure vessel have received great attention on their research and development.The combination of CAD and pressure vessels' design will increase the standards and efficiency of design and shorten the developing cycle of new Manufactures.But result from the considerable specialty of CAD software development, existing chemical equipment CAD software drop behind computer application technology and have a series of problems in development, maintenance, extension and upgrade.So it shows great values to figure out a practical set of chemical equipment CAD system.With petro-chemical pressure vessel as the design object, this article has used the VBA platform,database technology, DAO technology and advanced design methods,and developed a petro-chemical pressure vessel-CAD application system based on VBA.Main design of pressure vessel, parametric design&drawing of standard parts and intensity check can be realized in this system.This system mainly has also two functions:two-dimensional parametrical design&drawing,and rapid three dimensional automatic entity modeling.For the current CAD technology and the development tools, the feasibility of developing CAD systems based on VBA platform has been put forward and basic function drawing modules are developed using VBA language in AutoCAD, Simultaneously has also used the object—oriented program analysis&design methods and DAO are applied synthetically in the system.The design&drawing flat is AutoCAD2006, and the development environment is VBA which in AutoCAD in inlays.The pressure vessel-CAD system is composed of drawing information, Parametrization cartography, parametrical standard part and Vessel design related computation, divided into several modules:information initialization, standard parts design, and three-dimensional entity modeling.On the basis of two-dimensional design, a rapid three-dimensional automatic entity modeling function has been developed, which could transform the production model from two-dimension to three-dimension, the drawing efficiency has a great of increasement.The developing technology of AutoCAD is deeply researched and a few of design methods are brought forward in this paper which are very useful in development of CAD software.The software is used by different parameters practically, tested repeatedly, the system has a friendly interface, simply operation way, powerful function and runs safely, realizes parametric design and parametric drawing form primal data to draw, which provides the important mentality and the method for the pressure vessel CAD design system's research.