| To some degree, overhead traveling crane is being tandem products, the metalstructure design of overhead traveling crane is quite standard, the maindifference between the same tandem products is just parameters and substructure,the overall structure is similar. If engineer want to design different type ofthe same tandem products, they don't need to restart the design, what they shoulddo is just some similarity serial design based on the basic design. The functionsimilarity and structure similarity, also the standard parts provide thecondition for doing parametric serial similar design. Through these partsmodel's fast modification, they can design 3D parts model of new products andassembly.In this paper, the 3D parametric design system of overhead traveling craneis designed based on the study of structure feature, aloes the design flow anddesign method;contemporary combine the engineer's design experience and theoryof metal structure design;and consider the practical requirement of enterprise.Based on the 3D design platform─SolidWorks, redevelopment the API function ofSolidWodrks by VB6.0, adopt the object-oriented technology and modular designtechnology, develop the parametric design system that is both mutualindependence and interrelation, including main girder, end girder, assistantgirder, attached structure and metal structure assembly, and set up the partsmodel and engineering drawings database and characteristic database. Accordingto the absurdness of engineering drawings after parametric driving, doredevelopment to the engineering drawings based on the study of theory and methodof engineering drawings, realize the auto-regulation through programming. Theefficiency is improved by 60%, make engineer complete the design work that needmany engineer a long time's work now just a few more than ten minutes, greatlyreduce the engineer's intensity of work and cut the design time, so the engineerscan put more time into the innovation of product.
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