计算机辅助装配工艺设计

一、概述本文在Pro／Engineer装配环境下，采用Pro／De－velop接日，结合某型号导弹复杂装配的应用情况，研究出在装配设计阶段通过自动和交互编辑手段制定装配工艺的方法。它描述了装配体装配顺序、装配路径、相应路径段上的零、部件姿态，用数学形式对装配工艺进行描述，并结合实际生产情况输出装配工艺文件，为装配生产部门提供具有实际意义的指导性意见。二、装配模型简述装配工艺与装配模型紧密联系，装配工艺是对装配模型的操作，所以本文首先简单介绍一下装配模型。本文考察到Pro几ngineer装配模型表达产品信息上的不足（如在几何…     

计算机辅助装配工艺设计系统研究

本文以数控车床主轴箱为对象，对计算机辅助装配工艺设计系统进行了研究，提出了装配信息模型和装配生成，装配工序设计方法。     

计算机辅助装配工艺设计关键技术研究

对计算机辅助装配工艺设计(CAAPP)关键技术进行了综述，从产品装配建模、装配序列规划、装配序列的评价和优化等角度，对目前该领域的国内外研究现状进行了分类和剖析，最后对计算机辅助装配工艺设计进行总结和展望。     

基于实例的计算机辅助装配过程设计

为了简化装配过程设计,使过于依赖人类经验的装配过程设计自动化,提出了基于实例推理技术的计算机辅助装配过程设计方法.提出装配线设计系统体系结构,研究如何确定装配过程设计系统的输入信息,利用基于实例的推理技术将装配功能树映射为装配过程机制树,以实现装配过程设计.将装配实例分解为装配过程功能需求、装配过程行为和装配过程机制三个层次,根据输入零件类型和装配过程类型计算装配实例的相似性系数,并基于模糊评价方法从多个可行相似实例中选择最优的装配过程实例,通过机床修改、单元操作修改和工艺编程修改三步对实例进行修改,以满足给定的装配功能需求.运用具体实例验证了所提方法的正确性.     

数控车床主轴箱计算机辅助装配工艺设计系统的研究

本文所讨论的ＳＥＣＡＡＰ系统以南京第二机床厂所生产的数控车床主轴箱为研究对象，完整地实现了主轴箱部件装配工艺的自动设计。文中重点分析了该系统的原理与结构；讨论了装配工艺知识规则库的建立；提出了装配信息的描述方法；讨论了装配顺序的决策思想；介绍了装配工序图的自动生成方法。     

数控车床主轴箱计算机辅助装配工艺设计系统的研究

本文所讨论的SECAPP系统以南京第二机床厂为应用背景,以数控车床主轴箱为研究对象,完整地实现了主轴箱部件装配工艺的自动设计.文中重点分析了该系统的原理与结构;讨论了装配工艺知识规则库的建立;提出了装配信息的描述方法;讨论了装配顺序的决策思想;介绍了装配工序图的自动生成方法.     

数控车床主轴箱计算机辅助装配工艺设计系统的研究

本文所讨论的ＳＥＣＡＡＰ系统以南京第二机床厂为应用背景，以数控车床主轴箱为研究对象，完整地实现了主轴箱部件装配工艺的自动设计，文中重点分析了该系统的原理与结构；讨论了装配工艺知识规则库的建立；提出了装配信息的描述方法；讨论了装配顺序的决策思想；介绍了装配工序图的自动生成方法。     

数控车库主轴箱计算机辅助装配工艺设计系统的研究

本文所讨论的ＳＥＡＡＰ系统以南京第二机床厂所生产的数控车床主轴箱为研究对象，完整地实现了主轴箱部件装置工艺的自动设计。文中重点分析了该系统的原理与结构；讨论了装配工艺知识规则库的建立；提出了装配信息的描述方法；讨论了装配顺序的决策思想；介绍了装配工序图的自动生成方法。     

雷达结构三维装配工艺设计系统研究

针对二维装配工艺设计存在的问题,研究了雷达结构三维装配工艺设计系统。分析了雷达结构三维装配工艺设计过程,建立了雷达结构装配工艺信息模型,研究了EBOM向PBOM的转换技术,提出了一种三维装配工艺信息表示符号。开发并实现了雷达结构三维装配工艺设计系统,同时以某雷达某部件为例,验证了系统的有效性。     

敏捷制造模式下的计算机辅助装配工艺设计系统的研究

介绍了敏捷制造模式下的装配工艺设计系统的原理与体系结构 ,对系统中装配信息的获取、装配工艺知识库的建立、装配顺序的决策以及装配仿真的实现等几个模块进行了具体的分析     

装配工艺规划后处理的研究与应用

装配工艺规划是产品装配活动中的一个关键环节 ,直接影响着产品的质量和装配费用。计算机辅助装配工艺规划 (CAAPP ,ComputerAidedAssemblyProcessPlanning)在一定程度上提高了装配工艺规划的效率 ,然而它并不能完成装配工艺规划中的所有活动。装配工艺规划后处理是装配工艺规划的重要组成部分 ,它作为CAAPP的有效补充 ,利用计算机辅助手段进一步提高了装配工艺规划的自动化水平。本文提出了装配工艺规划后处理的体系结构 ,并从装配信息建模、装配工艺文件的生成和装配资源共享与信息转换三个方面对其关键技术进行了较为系统的研究     

An agent-based collaborative assembly process planning system

In recent years, the competition among manufacturers to reduce the development time of new products has been quite fierce. At the same time, customers’ needs have become relatively diverse. Considering these facts, it is essential for manufacturers to build an assembly line in the shortest time possible. Because an assembly line for varied and complex products involves numerous workstations, assembly operations and resources, it is extremely difficult for assembly process planners to develop an efficient assembly sequence and position. Thus, in order to overcome such complications, the best alternative is for a number of process planners to develop a process plan synchronously . This paper introduces a new process planning method for assembly lines based on a collaborative system. In it we propose an agent-based collaborative process planning system, and to verify it, we implement the system in an Internet environment and apply it to some practical case studies.     

面向装配工艺规划与仿真的装配工具信息模型的研究

详细论述了装配工具信息模型建立的方法,研究了建立装配工具信息模型的相应策略,并以Pro/E为平台建立了相应的装配工具库系统并给出了搜索工具的算法流程.     

Concurrent and collaborative process planning for automotive general assembly

To ensure competitiveness in today’s automotive market, process planning should be performed concurrently with other engineering activities during new car development. In this paper, new business workflows and the support system for process planning of an automotive general assembly are proposed and presented. Since process planning for a whole general assembly shop is a huge and complex job, several process planners should execute planning together. Therefore, planners should consult with one another regarding his/her results through continuous online communication and cooperation. Process planning based on computers, database and Internet is inevitable for reducing manufacturing preparation time and costs through concurrent and collaborative engineering. In this research, the Web-based process planning system for general assembly shops using the bound operation method is implemented and proven. By using this system, savings in time and cost of assembly process planning are possible, and the reliability of the planning results is greatly improved.     

基于知识的智能装配规划系统

为了保证装配工艺的合理性和实用性,提出了基于知识的智能装配规划方法。该方法利用联接件装配工艺的特点和知识,进行装配序列规划,建立了基于联接件知识的装配实例库,生成装配序列的途径有典型实例的匹配、标准实例的匹配和运用有向联接件知识的装配序列规划。为了使产品的装配周期最短,并提高装配系统的柔性和可靠性,提出了基于多代理的装配任务规划方法,该方法综合考虑了装配操作时间和装配工具变换时间等因素。     

SMT-TAB: A process planning system for PCB assembly using TAB and SMT

Process planning is a critical function in any manufacturing domain. This is especially true in the electronics manufacturing area where substantial heuristic and experiential knowledge is commonly used during process plan development. While research in computer-aided process planning (CAPP) has tended to concentrate in the machining realm, few CAPP systems have been developed for electronics manufacturing applications and more specifically for the printed circuit board (PCB) assembly domain. Besides, the CAPP systems that have been developed for this area have dealt with either insertion mount or surface mount PCB assembly processes only.Tape automated bonding (TAB), though a relatively new technology, is gaining importance in electronics assembly owing to its inherent advantages. The advent of fine pitch technology together with the ever increasing need for more inputs/outputs and greater pin counts in integrated circuit applications has enhanced the use of TAB technology in electronics manufacturing. This trend has been further augmented by the increasing need for compactness in consumer electronics.This research designed and developed a prototype CAPP system for the PCB assembly domain. The system developed generates a process plan for PCBs populated with surface mount and/or TAB components. An artificial-intelligence based expert system approach has been used in the design and development of the CAPP system. Outputs generated by the system are presented along with ideas for future research.     

3D环境下飞机装配工艺规划与仿真一体化模型

为实现3D环境下飞机装配工艺规划与仿真过程的集成和统一,提出了一种飞机装配工艺一体化模型。该模型综合了装配工艺设计对产品对象以及工装、工具等资源对象在信息组织管理、零件几何运动描述等方面的要求,确定了装配＂产品—资源—工艺＂间的层进映射关系,将产品对象和资源对象间复杂的1∶N或N∶1关系分解为具体的1∶1关系,并基于文件对象结构原理建立了其数学表示模型。以某飞机中央翼部件装配为例,将该建模方法应用到自主开发的数字化飞机装配工艺规划与仿真系统中,验证了所提方法的有效性。     

基于减速器的装配序列规划方法研究

针对减速器产品分析出零件之间存在众多种装配序列,随着装配单元数量的增加,从而产生组合爆炸或大量的交互问答.为了解决这个问题,对减速器的结构进行了分析,并结合减速器的工作原理,提出了专家系统在解决问题具有的优势,根据关系数据库的特点,将装配知识存储在齿轮减速器知识库中并结合推理机及其推理算法,利用标准数据查询语言来对知识库进行正向推理.从而降低了装配序列规划的计算复杂度,保证规划所得装配序列的可行性和实用性.     

基于I-DEAS平台的产品装配仿真系统的开发

对于尚处在设计阶段的产品来说,可装配性好坏最直观的效果是在计算机上仿真产品的实际装配过程。为此提出并实现了一种基于I-DEAS平台的装配仿真系统,该系统可有效地对产品的可装配性进行评价,并验证装配工艺规划结果,并在此基础上生动直观地进行产品的预装配,以检测与装配有关的问题而无需实物模型。     

An effective integration approach toward assembly sequence planning and evaluation

An integration strategy for assembly sequence planning and sequence scheme evaluation is proposed. This strategy can be used to plan a reasonable assembly sequence, to optimize a sequence scheme, and to predict whether a collision will occur between the assembly tool and assembled components by considering factors like target components and assembly resources. A hybrid method is presented for assembly sequence modeling that combines human-computer interactive operations to manually build a hierarchical assembly sequence main model and a hybrid graph method to automatically generate sub-assembly sequence schemes of the main model. An optimization algorithm based on time-cost is introduced to handle a best candidate components selection. This relieves the problem of limited capability found when handling large size assembly models with traditional methods. The essential issues involved in system implementation are discussed as well; these include a representation method for the assembly consequence model, an optimization model of assembly sequence planning, and an object-oriented system architecture model employed with multi-agent technology for visually evaluating the assembling process. This system, KM computer-aided assembly process planning, KMCAAPP, has been developed on the basis of our previous work, KMCAD3; KMCAAPP uses the presented approach. KMCAAPP can be integrated with CAD model from KMCAD3D. A case study shows that the presented approach can use large CAD assembly models and delivers a feasible and effective way to integrate the assembly sequence planning process with scheme evaluation by visually evaluating the assembling process. This allows the identification of design errors in a timely manner and mitigates economic loss.