A Surface Area Calculation and CAPP System for Non-Axisymmetric Deep Drawing Products

In this paper a surface area calculation for non-axisymmetric deep drawing products of elliptical shape was constructed for the design of blank shapes of deep drawing products by using an AutoLISP function in AutoCAD software. A computer-aided process planning (CAPP) system for rotationally symmetric deep drawing products has been developed. In this study, a CAPP system for non-axisymmetric deep drawing products of elliptical shape was constructed using process sequence design. The system developed consists of four modules. The first is the recognition of shape module for recognising non-axisymmetric products. The second is a 3D modelling module for calculating the surface area for non-axisymmetric products. The third is a blank design module for creating an oval-shaped blank with an identical surface area. The fourth is a process planning module based on production rules that play the most important role in an expert system for manufacturing. The production rules are generated and upgraded by interviewing field engineers. The drawing coefficient, the punch and die radii for elliptical shape products are considered as the main design parameters. The suitability of this system was verified by applying it to a real deep drawing product. This surface area calculation and CAPP system should be very useful for reducing the lead-time for manufacturing and for improving the accuracy of products.     

网络化制造环境下车间层信息交互模型及实现

网络化制造中，车间层的信息化水平在一定程度上可通过信息交互方式进行衡量。针对现有网络化制造环境下车间层信息交互和资源共享过程中存在的问题，提出了基于对等网络和移动Agent的车间层信息交互模型，重点阐述了该模型的体系结构、通信过程及系统安全性等；设计了用于实现以上模式的信息终端和系统，并结合某汽车焊装自动化生产线网络化监控与管理系统，分析了它在实际应用中所表现出来的特点。     

基于AutoCAD用VB二次开发零件测绘CAD系统

以模块化设计思想为指导,以Visual Basic为开发工具,对AutoCAD软件进行二次开发,研制出了用户界面友好的机械零件测绘CAD系统.该系统实现了计算绘图一体化,能显著提高测绘效率.     

基于AutoCAD环境的工程图纸自动排版系统的设计

针对目前企业大量电子图纸打印输出的现状,为了降低打印成本和重复性的劳动,并缩短产品的设计周期,在AutoCAD环境下,采用ActiveXAutomation技术开发工程图纸自动排版系统的方法,重点对系统的设计思路、算法设计和界面设计进行了阐述,该系统目前已在多家企业得到应用,并取得了很好的效果。     

基于信息集成的CAPP系统中工序图自动生成技术

在信息共享集成的原则下,探讨CAPP系统中工序图的自动生成技术;并对工序图数据结构、工序图决策策略、工 序图绘制与标注等几个关键技术问题,进行较深入的分析探讨。     

毛坯外形对盒形件拉深成形的影响

盒形件是典型非轴对称件，其拉深成形是一种包含几何非线性、材料非线性，接触非线性的强非线性问题的复杂力学过程，影响因素很多，规律难以定量表达，用ANSYS有限元软件，模拟了在同一套模具和成形条件下，不同毛坯外形的盒形件成形过程，找出了毛坯外形对盒形拉深件应力应变影响规律，并用实验验证了模拟结果的可靠性。     

A conflict-based priority dispatching rule and operation-based approaches to job shops

Job shop scheduling (JSS) problems consist of a set of machines and a collection of jobs to be scheduled. Each job consists of several operations with a specified processing order. In this paper, a job shop model problem is scheduled with the help of the Giffler and Thompson algorithm using a priority dispatching rule (PDR). A conflict based PDR is used to schedule the job shop model by using Genetic Algorithms (GAs). An iterative method is applied to the job model to find the optimal conflict-based PDR order and the operation sequence. The same job shop model is also scheduled based on an operation using simulated annealing (SA) and hybrid simulated annealing (HSA). A makespan of the job model is used as an objective. These four methods are considered as different solutions for each problem. A two-way analysis of variance (ANOVA) is applied to test its significance.     

基于Web定制的模架智能CAD系统

论述了一种基于Web定制的模架智能CAD系统。当用户从客户端定制了模架的结构并确认后，服务器端可自动生成产品的装配固。主要阐述了整个系统的设计、图形数据库的设计原则和服务器端图形自动生成方法以及尺寸的标注方法等。介绍了系统的使用效果。     

最优化生产技术在模具企业车间作业计划中的应用研究

通过对作业计划编制方法和模具企业生产系统特点的简略分析与总结，提出在模具企业车间作业计划中运用最优化生产技术。研究了最优化生产技术应用于模具企业车间作业计划需要进一步改进的几个关键问题。针对模具企业生产过程的动态多变性，提出了一个闭环控制系统模型。     

单件小批量生产作业计划的倒排产算法研究

提出一种用于单件小批量生产中编制作业计划的算法模型———倒排产算法 ,并建立一套包含此模型的作业计划及调度监控集成系统。在科龙等企业的生产部门进行实施 ,获得良好效果