Parametric Design Of The Key Components Of The Bridge Crane System

With the development of three-dimensional graphics and computer technology, the three-dimensional design has become an inevitable tendency in CAD application field. At present, the application of three-demensional CAD techniques on overhead traveling crane design mainly focuses on three-dimensional solid modeling, finite element analysis, building standardized components library, and so on. But the overall three-demensional design on the whole design is still at the groping phase. In this thesis, the three-demensional parametric CAD system is developped in the steel structure of overhead traveling cranes. It not only improves the design efficiency and quality, but also has great practical value and can be a reference tool for the finite element analysis of the products. Moreover, it meets the need of the modern design technique.In this thesis, a simple three-dimensional parametric CAD system on the steel structure of overhead traveling crane is discussed. The system is based on the Pro/E wildfire platform and is finished by using Pro/toolkit as secondary development tool in a VC++6.0 compiler.This thesis has a detailed discussion about the analysis and design of the parametric CAD system.Here the parameter design module is divided into three parts including the overall design module, the component design module and the element design module. Each module has its own submodules. By using the object-oriented technique the design objects, design parameters and models are classified as different groups.This thesis also introduce two approaches on how to finish the parametric design. They are parametric model library and parametric assembling models respectively. Finally, this thesis studies the secondary development techniques on Pro/E plateform and builds extended functional function library. With VC++6.0, a friendly user interface which is easy to use and understand is designed.The techniques discussed in this thesis provides an advanced, reliable and rapid design approach for overhead traveling crane.