Three-dimensional Process Design And Optimization Of Process Parameters For Typical Box Parts

With the rapid development of digital manufacturing,there is a higher requirement for the development of CAD/CAPP/CAM integration technology as the basis of virtual manufacturing.Among them,CAPP is the key in the integration process,but due to the complexity of its own functional structure,its Development has been lagging behind CAD and CAM technologies.The traditional process design form that combines the widely used3 D design and 2D drawings can no longer meet the production requirements.For this reason,this article has developed a full 3D process design system for typical box parts.First of all,this article understands the current status of relevant knowledge of research and development of 3D process design systems at home and abroad,analyzes and compares existing information integration methods,and chooses to use CAD/CAPP direct integration to build 3D process design systems.Secondly,determine the design scheme of the 3D process design system for typical box parts,analyze the system functional requirements and create a system functional framework,and introduce the key technologies used in the 3D process design system for typical box parts.In terms of feature recognition and extraction technology research,at first analyzed the processing characteristics of typical box parts,compared the existing feature recognition methods,adopted the attribute surface adjacency graph method,and improved it by combining with VF2 subgraph isomorphism Design a processing feature mapping library that meets the requirements.Proposed two ways to generate the process route by modifying the original process route template and grouping based on processing feature elements.A reverse generation method of the process model is obtained by using synchronous modeling and WAVE correlation technology.Based on the cutting parameter optimization model and improved genetic algorithm,the cutting parameters are optimized to realize the optimal allocation of process resources.Based on the cutting parameter optimization model,an improved non-dominated sorting genetic algorithm was selected to optimize the cutting parameters.Based on the above research,using UG NX as a platform to develop a three-dimensional process design system for box parts,and demonstrate the system functions with a box part,which proves the reliability of the functions developed by the systems.