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The Progressive Die widely used in light industry, automobile , electronics, communications and other fields , require high processing accuracy , due to the complex structure of many parts , and make it difficult design and manufacture . Complex progressive die design process , modify frequently rely on designers to interactively complete the modification of the design changes , the design of the consistency of the results is difficult to guarantee accuracy and design efficiency . In order to enable users to convenient , efficient design , progressive die CAD system must have good design changes automatically processing capacity . In this paper, based on the realization of the design changes of NX Progressive Die CAD system , control and management issues . Design changes to address the following issues : First, the design process to establish the relationship between the contents of each part of the design ; modification occurs , timely and effective manner , through appropriate mechanisms to update the data to ensure accuracy and consistency of the design results , taking into account the update efficiency ; effective management of the components related to the design changes . In this paper, the content and features of progressive die design , parametric variables associated smart objects and object collector , WAVE - based geometric relationships , based on UDO object associated method , the information associated with the progressive die design process . Components cloning , assembly layout and component suppression on progressive die design changes associated with parts management , role - based rights management methods , and delay centralized control method updates , design changes can operational and updates efficiency . Based on the above theory and method , progressive die assembly model supports top-down hierarchical design , development support design changes based on the NX -level progressive die CAD system . In this system , the authors focus on research to solve the structural design of progressive die stamping step mold automatic change processing , as well as similar stampings replacement parts and components in the the additional mold design and collaborative design three progressive die overall change process management , greatly improving the progressive die design quality and efficiency .
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