模具CAPP专家系统与加工过程仿真的模型研究

为保证模具CAPP专家系统生成的工艺规程是合理和有效的，集成了用于模拟检验的包含几何仿真和物理仿真的加工过程仿真。根据仿真结果来修正工艺规划至最优，达到提高一次试模成功率的目的。在UG／CAM的刀轨仿真功能基础上，用MARC(模型参考自适应控制)方法来实现加工过程的物理仿真。设计了一个系统模型，从理论上为完善CAPP专家系统提出了解决方案。     

一种实现轴承CAD与CAPP系统集成应用的解决方案

本文介绍了一种基于PDM平台、在轴承CAD系统和CAPP系统之间实现集成应用的解决方案,并通过实例重点阐述了该方案的主要内容轴承的设计过程包括产品设计(以下简称CAD)和工艺过程设计(以下简称CAPP),其中CAD输出的图样(简称产品图)用来确定产品最终的成品尺寸,而CAPP输出(简称工艺文档)则是用来确定产品实际的加工过程数据,以确保达     

智能化CAPP工艺数据库/知识库的管理

智能化CAPP(Intelligent CAPP,ICAPP)是AI和CAPP技术相结合的综合性研究领域。它将AI的理论和技术用于CAPP之中,使CAPP系统能够在一定程度上具有工艺设计师的智慧和思维方法,具有处理多意性和不确定性问题的能力,可以在一定程度上模拟领域专家进行工艺设计,使工艺设计中的许多模糊问题得以解决。在箱体、壳体类零件的工艺设计中,由于它们结构形状复杂,加工工序多,工艺流程长,而且可能存在多种加工方案,其工艺设计的优劣主要取决于人的经验和智慧。因此,一般CAPP系统很难满足这些复杂零件的工艺设计要求。而ICAPP系统能汇集…     

基于面向产品CAPP工艺信息建模的研究

工艺信息建模是CAPP集成化应用系统建立的一个重要环节，工艺信息模型建立的质量直接影响着CAPP与其它系统的信息集成和共享。采用当前现有的建模方法建立的工艺信息模型，在一定程度上影响了面向产品的CAPP系统的集成化应用。为此，本文提出了一种面向对象（O-O）的工艺信息建模方法，从系统化、集成化角度对CAPP相关工艺信息进行分析与建模，再通过面向对象的工艺知识库管理技术，可以理想的实现CAPP与CAD、CAM、PDM等应用系统信息的集成与共享。     

基于SOA技术的BOM集成研究

BOM数据贯穿于产品设计、工艺和制造的全过程。针对现有PDM与CAPP系统,采用基于SOA技术的集成接口方式,搭建了以产品数据管理(PDM)系统为核心与工艺规划管理(CAPP)系统之间的BOM数据集成框架,实现了从EBOM到PBOM的数据传递,同时为实现企业各系统之间的应用集成奠定了基础。     

基于面向对象和概念树的CAPP工艺知识表达研究

工艺知识表达是CAPP系统的主要部分，本文介绍了CAPP技术和工艺知识表达的基本概念然后基于一种采用面向对象方法和概念树方法对工艺知识进行表示与组织，并应用在制造资源中。     

OOCAP-面向对象的计算机辅助创生式工艺设计

CAPP是集成的CAD/CAM系统中的连接桥梁。提供有效的过程设计及管理的关键是把知识规则和数据库中表示现实世界事实的数据结合起来。本文介绍了一个在PS/280机器上Smalltalk环境下实现的原型系统OOCAP——面向对象的计算机创生式工艺设计,其目的旨在在面向对象的环境下,通过构造知识库系统,从而实现对机械零件的加工工艺过程的自动设计。集知识、事实及运行于对象一身是该系统的主要特色。另外,该系统对机械零件加工过程进行仿真,以动画形式,逼真地反映了从选材到获得产品的全过程。     

CAPP系统中参数化技术的研究与应用

根据零件相似性的原理，对工艺设计采用参数化的设计方法，研制出开目参数化CAPP开发工具，介绍系统的设计思想、系统结构及各部分的功能，重点介绍了用VISIO进行流程定义的方法。     

CAPP系统中动态工艺知识管理技术研究

计算机辅助工艺设计(CAPP)使工艺设计人员摆脱大量、繁琐的重复劳动.如何利用现有、成熟的工艺知识,是每个工艺工作者和软件设计人员面临的主要问题.通过零件的特征参数属性和其特征编码关联其加工方法是目前技术水平下实现动态工艺知识有效管理的一种可行的方案.结合CAPP系统在企业的应用实践,论述了面向对象的工艺信息建模技术、成组技术在动态工艺知识管理上的应用及实现方法.     

CAPP中产生式规则的检查方法

该文根据“863”项目“基于知识的箱体CAPP系统”开发经验,提出了一种实用的产生式规则表示和检查方法。通过在规则的条件部分使用嵌套函数,可以表达零件工艺规划中比较复杂的逻辑判断关系,通过对规则的词法检查、语法检查和逻辑关系检查最终保证了从单条规则到整个规则库的正确性和一致性。     

针对产品的CAD／CAM一体化技术

本文系统地介绍了一种基于ＣＡＤ工作站，利用Ｉ－ＤＥＡＳ软件实现的针对壳体类零件的ＣＡＤ／ＣＡＭ一体化技术。论述了利用ＰＥＡＲＬ数据库实现的从ＣＡＤ模型到ＣＡＰＰ之间信息的传输，分析了在ＣＡＤ与ＣＡＭ集成中创成式ＣＡＰＰ所起的关键作用，并介绍了利用ＧＮＣ图形辅助数控软件对加工过程的仿真以及机床文件的准备，最后系统能生成正确的数控指令。系统初步实现了ＣＡＤ／ＣＡＭ一体化。     

智能CAPP系统开发技术研究

分析了CAPP技术面临的主要技术难题 ,提出了解决这些问题的技术方案 ,并运用这些技术方案建立了ZYCAPP/ES 1智能CAPP系统 ,经验证取得了满意的结果     

面向产品数据的管理型CAPP系统

本文介绍了在EDS公司的IMAN产品数据集成平台下开发的能生成动态工艺方案的管理型CAPP系统，说明了在PDM软件环境下，面向产品对象的工艺规划数据的设计和集成管理的实现机制及功能特点。     

Application of genetic algorithm to computer-aided process planning in distributed manufacturing environments

In a distributed manufacturing environment, factories possessing various machines and tools at different geographical locations are often combined to achieve the highest production efficiency. When jobs requiring several operations are received, feasible process plans are produced by those factories available. These process plans may vary due to different resource constraints. Therefore, obtaining an optimal or near-optimal process plan becomes important. This paper presents a genetic algorithm (GA), which, according to prescribed criteria such as minimizing processing time, could swiftly search for the optimal process plan for a single manufacturing system as well as distributed manufacturing systems. By applying the GA, the computer-aided process planning (CAPP) system can generate optimal or near-optimal process plans based on the criterion chosen. Case studies are included to demonstrate the feasibility and robustness of the approach. The main contribution of this work lies with the application of GA to CAPP in both a single and distributed manufacturing system. It is shown from the case study that the approach is comparative or better than the conventional single-factory CAPP.     

Computer aided process planning with CMPP

This paper describes current work on an extensive CAPP system that consists of over 50,000 lines of FORTRAN code in 14 main programs and 7 datafiles. It in addition to process plans, CMPP generates shop drawings and tolerancing information. The authors current research with this system includes building an intelligent interface with CAD systems, an intelligent process plan generator and a tolerance chart generator.     

PWA_Planner - A rule based system for printed wiring assemblies process planning

Using rule based approach, printed wiring assemblies (PWA) process planning can be automated. In this paper a prototype computer-aided process planning (CAPP) system for PWA, PWA_Planner, is presented. The system takes a PWA design as input and generates process plan and part programs for the production on automatic component mounting machines. The modelling of the problem and the final results are discussed in the paper.     

Automated feature ordering for generative process planning systems

Abstract: Generative computer aided process planning (CAPP) systems are typically split into two main modules. The first is concerned with the identification of component features and their parameters, while the second addresses the problem of automatically ordering the manufacture of the features into an efficient process plan. BEPPS is a CAPP system under preparation at the University of Bath. It has been designed with a modular structure that includes modules for conventional machines, NC machines, tooling and fixtures, cost estimating and links to both CAD and Production Management Systems. This paper concentrates on the BEPPS-ROT module for planning rotational components on conventional machine tools, and in particular on the methodology adopted for feature ordering. The novel feature ordering logic is based on rules gathered from industry and takes into account the constraints imposed by such features as the work holding arrangements and the need to rechuck the component during manufacture. After the feature identification stage has been completed the feature ordering logic enables machine tools and equipment to be selected and the process plan to be generated automatically.     

Modeling integrated CAPP/PPS systems

In order to solve the isolation and the unilateral sequence integration between CAPP and PPS, this paper proposes the integrated system of CAPP and PPS based on distributed and dynamic process planning (ICAPPS), aiming for single-piece, small-lot and made-to-order production (SPSLMOP), and then systematically builds the integrated ICAPPS model. On the basis of the integrated model, this paper constructs the function model of ICAPPS, which includes the designing layer, the part planning layer, the shop planning layer and the scheduling layer in detail, according to the requirement for the rationalization of resource utilization, process design and plan scheduling in SPSLMOP.     

用于柔性生产线方案设计的分层工艺规划方法

在建立面向对象工艺模型的基础上，提出用于柔性生产线方案设计的分层工艺规划方法，即特征工艺设计、零件装夹定位规划、特征排序规划、工步排序规划、工序聚合规划等5个层次．采用基于黑板的递阶式层次推理结构，实现了综合排序策略，完成了用于柔性生产线方案设计的CAPP系统开发。