The mathematics model of multiobjective optimum combination , good algorithms and cad system for strip layout of multistep progressive die are given in this paper 摘要提出了多工位级进模工步设计的多目标最优化组合的数学模型、通用算法以及建立其cad系统的实现方法。
This paper also gives a brief introduction to " a strip layout cad system with the intelligence of multistep progressive dies " and its applications that are initiated by the authors 还简单介绍了由作者研制开发的“智能型多工位级进模工步排样cad系统”及其应用实例。
Abstract : the paper introduces a forming process and design of progressive die for moveable spring used on a relay , and it carries on a process of double - layer forming and a way to protect useless stuff from jumping onto bottom plate 文摘:介绍了某继电器中的动簧片成形工艺确定和级进模设计、在级进模中叠片成形及防止小废料上带的一种方法。
Then the content and realization of each part is presented in detail . as strip layout being the nodus of progressive die design , we collect the rules from experiences and present an optimizing algorithm 根据本系统处理对象? ic引线框架类零件的特点以及企业的需求，主要用交互方式实现了工艺设计，并提出了基于优化准则的级进模工步设计算法。
In chapter 5 , the means of structure design and part design are researched on . then the realization of structure design using top - down design is presented . with information of separated loops , the efficient part design has been achieved 第五章研究了系统结构设计与零件设计的实现方式，重点分析自顶向下设计方法在级进模结构设计中的应用；并根据工艺分析系统的特征环几何信息来设计凸凹模零件，实现工作区零件的快速设计。
Feature - based modeling is adopted on the base of analysis for both geometrical modeling and feature - based modeling . combining the modeling of products in solidworks , an improved modeling method is presented . in chapter 4 , the interactive process design flow of ppdcs is studied based on the specialty of ic lead frame 第三章主要分析cad系统中产品几何造型方法与特点，基于特征造型方法研究现状及特点以及基于特征技术的级进模cad系统；提出本系统中的产品模型建立方法；分析solidworks所采用的特征设计方法。
This paper analyses in detail some problems influencing the strip layout design of the multistep stamping progressive die , gives optimum design rules of the strip layout , which can be used by computer , sets up a practical mathematical model and puts forward a new , high efficiency and reliable method that can complete the design automatically 摘要分析了多工位冲裁级进模工步排样所遇到的各种干涉问题；给出了易于计算机化的工步排样优化设计准则；建立了实用的工步排样优化设计数学模型；提出了高效可靠、能自动完成工步排样优化设计的新方法。
In order to improve the efficiency of progressive die design , this dissertation offers the research on the development of ppdcs ( cad system for precision progressive die ) based on solidworks . it focuses on the characteristics of process design and the realization of interactive design , and also covers feature - based product modeling and top - down structure designing 本论文以提高模具企业的设计效率为目的，综合研究了基于solidworks的精密级进模cad系统ppdcs的开发，重点分析了系统的工艺设计特点与交互式工艺设计的实现方法，同时对级进模cad系统基于特征的产品模型与“自顶向下”的结构设计进行了探讨。
In chapter 1 , the background and the target of this dissertation are introduced . and the actuality , tendency and main deficiency of progressive die cad system are summed up . at the end , the key technology and structure of this thesis are interpreted 第一章介绍论文选题背景，也即开发这一精密级进模计算机辅助设计系统的目的；介绍了级进模cad系统发展状况与开发技术，总结目前级进模cad系统的存在问题与发展趋势；从系统全局出发，概要介绍了系统应用中的关键技术。
