面向产品综合式CAPP系统的开发研究

根据现代企业对CAPP系统的要求 ,开发了一种“杭汽轮叶片工艺计算机辅助规程设计系统”(以下简称HTC -YPCAPP) ,通过分析整个产品零件的工艺设计过程 ,介绍了该系统的开发思路和设计要点 ,提出开发CAPP的一种理念———“面向产品的综合式CAPP系统”     

基于派生式并具有自学习能力的CAPP原型系统研究

分析了派生式CAPP系统存在的局限性以及开发完全创成式CAPP系统尚待解决的问题,将基于实例推理的CAPP原理与传统派生式CAPP相结合,提出了一种新型的、具有自学习能力的混合型CAPP原型系统.这一系统继承了派生式CAPP的优点,同时克服了派生式CAPP系统的一些局限性,例如适应性和通用性差,即当制造资源发生变化时,原有的CAPP系统不再适用,这就导致现有的CAPP系统没有通用性.详细论述了基于派生式并具有自学习能力的CAPP原型系统的工作模式和原理,为开发具有通用性和实用性的CAPP软件提供原型和理论基础.     

CAPP技术及应用

详述应用计算机辅助工艺设计(CAPP)技术的重要性,分析CAPP在计算机辅助集成制造系统(CIMS)中的重要作用,提出CAPP系统开发的流程和实施步骤。     

面向用户的综合式CAPP系统

开发了一种综合式计算机辅助工艺规程设计系统（SI－CAPP2000），系统以企业对CAPP实际需求为出发点，将人机交互式、典型工艺式、智能式工艺规程设计有机地结合起来，由用户根据实际情况自主选择零件，系统还首次将工艺文件数据管理作为系统重要组成部分，使系统集设计与管理于一身，从而满足企业对CAPP新需求。     

客户化CAPP系统的研制与开发

根据我国企业的生产现状，讨论了CAPP存在的问题，提出了“以产品数据为基础，以交互式设计为手段，以工艺知识库为核心，以实现企业需求为己任，以尽善尽美为目标，以集成化、智能化、工具化、模块化、网络化和实用化为指导思想”的CAPP系统开发模式，改变了过去盲目追求高度自动化的系统开发理念，研制并开发了高度客户化的模块式CAPP系统．     

一种CAPP变异式生成工具

一、前言随着计算机水平不断提高,计算机在机械加工领域得到了广泛的应用。企业应用CAD、CAPP、CAM已成为提高产品设计制造效率的主要手段之一。由于CAPP系统的特殊性,CAPP在开发、应用中仍存在诸多问题:(1)CAPP系统开发周期长。(2)CAPP应用范围狭窄,企业设计CAPP系统一般都依据本企业产品特点、加工习惯、设备限制等因素,因此企业设计的CAPP系统移植到其它企业中可能根本不能使用。     

智能化CAPP决策

机械制造系统中联结物质流和信息流的载体CAPP是集成制造系统和柔性制造系统的关键环节。人工智能(AI)技术在CAPP决策中显示了其特殊的优越性,制造技术的发展由原始集成、、低技术经济、规模经济到高技术经济、范围经济,经历了艰难的发展历程。我国机械制造技术要适应多变市场的需求,从根本上解决决生产上的落后状况,不能不加强工艺及相关技术的研究和应用。工艺设计及工艺的智能决策是计算机集成制造系统(CIMS)中同制造紧密相关的一个重要方面。智能化CAPP决策是以推理机和知识库为基础,首先将工艺知识加以描述,建立工艺设计系统的专用推理机和知识库,然后根据推理机的推理机制和知识库的专业系统知识设计零件的加工工艺路线、刀具的运动轨迹、切削参数的合理选择、优化等。因此,推理机和知识库的设计和实现,是智能化CAPP决策的关键。智能化CAPP的评介的主要性能指标就与推理机和知识库的可靠性和适用性有密切的关系。     

发展中的CAPP理论和方法

计算机辅助工艺规划(CAPP)是设计和制造之间的重要桥梁。但是,自1965年Nibel首提CAPP的概念以来,现存的诸多问题一直阻碍着CAPP的发展,可行的CAPP系统的成功前景仍然是模糊的。本文通过深入分析近来美国、德国、日本等国的学者在CAPP的理论和方法上的新的有益的探讨,特别是对CAPP系统的体系结构,工艺规划的数据模型,CAD/CAPP/CAM的集成策略三方面的分析,力图勾画出当前CAPP的发展模式,为国内CAPP的研究和发展提供参考。     

基于动态制造资源数据库的工艺设计模型研究及实践——工艺设计自动化理论研究之二

当前,CAPP已成为机械制造领域高科技研究的热点,在各种CAPP系统不断问世的今天,研究工艺设计自动化的基本理论,使发展中的CAPP系统研究与实践有突破性的进展尤为迫切。为此,本文作者构造了“基于动态制造资源数据库的自动工艺设计模型”,并进行了有益的研究与实践。本丈讨论了适合计算机求解的工艺设计一般方法,介绍了动态制造资源数据库的构成,阐述了以制造资源为动态导向,实现工艺设计自动化的意义及方法。     

浅谈CAPP系统的发展与应用

CAPP是CIMS中的关键技术,是连接CAD／CAM的桥梁。CAPP的功用是借助于计算机进行数值计算,逻辑推理功能来辅助工艺人员完成零件加工工艺路线的拟定。CAPP系统将产品设计信息转换成面向对象的加工制造信息,真正实现了CAD与CAM集成,资源共享。     

Integration and application of feature recognition and mould manufacturing planning navigating process

Plastic injection mould manufacturing is diverse and complex. Traditional mould manufacturing planning often relied on experience and techniques. Therefore, in order not to affect the operation or even cause some loss of the enterprises, geometry information of computer-aided design (CAD) should be converted into manufacturing information of computer-aided process planning (CAPP) and CAM for automatic feature recognition to shorten the lead time. This study is the secondary development in a CAD environment creating a network plastic injection mould manufacturing navigating system and CAD/CAPP for integration and application. As part design is feature-based, each processing step can be regarded as a feature. By applying the hybrid recognition technology of the graph-based approach, the rule-based approach and hint-based approach in the analysis of part feature appearances, it can automatically categorise all the manufacturing features of the part and convert them into corresponding processes. The CAPP developed in this study can convert the part manufacturing features into corresponding processes and plan the part process sequence according to the process priority constraint relations. As proved by the case studies, the use of CAPP in this study can reduce planning time by 87%. It can provide users with a reference regarding process sequence, and speed up the part planning progress. Coupled with the mould manufacturing navigating process, it can achieve automatic design and manufacturing.     

Integrated and concurrent approach for compound sheet metal cutting and punching

In sheet metal processing and manufacturing, there are a lot of small- and medium-sized job shops. These small- and medium-sized manufacturing companies have been facing keen competitive pressure in the market. This pressure has forced these companies to make every effort to shorten product development lead-time, improve production efficiency, approach high-quality standards, but at the same time cut down the costs. To meet the needs of these companies, this paper presents a compound cutting and punching production method supported by an integrated CAD/CAPP/CAM system in sheet metal manufacturing. Many existing commercial CAD/CAM systems are not suitable for this manufacturing method, especially under concurrent and global design and manufacturing environments. Some problems have to be solved before these CAD/CAM systems can be employed and integrated for this compound manufacturing method. This paper deals mainly with the solutions to solve some of these problems. The solutions include an integrated data integration platform based on Pro/INTRALINK and STEP, and a knowledge-based real time CAPP (RTCAPP) system for compound sheet metal cutting and punching. Within the presented CAD/CAPP/CAM system, some key modules have been developed. They are the automatic tool selection and manufacturing sequencing module, a shortest tool path optimization module, a cost estimation module and an automatic insertion of auxiliary path module based on knowledge bases. These modules will be addressed here.     

FMS中CAPP与CAM集成技术的研究

介绍了一个适用于FMS的CAPP／CAM集成系统。它由创成法CAPP系统，NC自动编程系统和它们之间的接口等主要部分组成。系统采用基于特征的零件描述方法作为集成环境下统一的零件信息模型。由CAPP系统生成的工艺规程，通过接口文件自动传输给NC编程系统，经过特征识别后，从特征NC程序库中调用相应的特征数控程序，实现NC自动编程，为检验NC程序的错误，系统还具有刀具轨迹仿真功能，系统用户界面友好，经加工验证，可用于生产。     

A modular architecture for rapid development of CAPP systems for agile manufacturing

Current manufacturing planning software systems, such as computer aided process planning (CAPP) systems, are general and in a closed form. It is very difficult to modify these systems to respond to a user's dynamically changing needs. These systems are no longer suitable for agile manufacturing. This paper presents research aimed at developing a novel architecture for the rapid development of CAPP systems. The architecture supports the construction of CAPP systems from prepackaged, plug-compatible software components. Specifications of the architecture and its building blocks are defined. Several important issues in architecture implementation are discussed, and an experimental system is illustrated. Finally, an Internet-based distributed CAPP system architecture is presented as a preview of next generation CAPP system development.     

销钉类零件的机加工工艺规程的自动生成研究

本文介绍一个面向销钉类零件的基于特征的参数化CAPP系统．利用成组技术将销钉分类编码,设计主样件的工艺规程模板．根据零件编码选择工件类别,输入零件的设计尺寸和公差,设定每种加工方法的加工余量,就可以计算出各道工序的尺寸,自动生成工序图．根据企业标准,各工序尺寸的公差实现自动分配,并由系统校验余量公差,最终生成完整的机械加工工艺规程．     

PDM/ERP与企业信息化

在ERP的实施中“数据问题”是其关键之一,必须首先解决。PDM系统作为各个信息孤岛的桥梁将CAD／CAPP以及ERP系统有机地集成到一起,使CAD与CAPP自动为ERP提供准确、完整、规范的数据,因此,PDM模块是ERP成功实施的关键。企业信息化的程序首先是实施CAD／CAPP／PDM,根据其实施情况和应用效果,然后在此基础上实施ERP就有了保证。     

计算机辅助工艺规程设计系统的体系结构研究

在现代机械制造业中,计算机辅助工艺规程设计(computer aided process planning,简称CAPP)具有重要的理论意义和实际需求。本文旨在建立一个适合企业实际需要的、完善的CAPP系统体系结构,重点在CAPP体系结构理论方面的研究,并在此基础上提出适应应用环境变化的工艺规划方法和能够被企业接受的CAPP系统开发的模式。     

关于CAPP的实践与思考

制造底层信息化是制造业信息化的薄弱环节，计算机辅助工艺规划（CAPP）不仅是制造底层信息化的重要研究领域之一，也是联系底层信息化与上层信息化的桥梁。工艺设计具有范围广、内容多以及个性化强等特点，因此难以实现通用化及商品化；而工艺设计是许多制造活动的交汇点，是与其他信息系统集成困难的主要原因之一。文章介绍了在CAPP方面的研究特色，包括应用框架技术实现开放式CAPP平台，通过BOM转换实现集成化，以及通过解决行业问题加强CAPP的推广实施等；指出了定量化CAPP、基于3D模型的CAPP能主车间级CAPP将是CAPP的重要发展方向。     

CAPP领域若干研究热点分析

ＣＡＰＰ领域的研究目前仍存在不少有待解决的问题，真正高水平的系统不多。本文分析了该领域最近的几个研究热点，讨论了其中的关键技术，并提出了可能的解决办法。