基于模块模板的桥式起重机桥架的可重用设计

设计重用是将以往的设计成果与设计经验用于当前产品的设计中,从而实现产品的快速设计.起重机桥架设计需要大量借鉴以往产品的设计方案,结合起重机桥架的模块化特点对设计知识的合理重用是提高其设计效率的有效方法.提出了基于设计重用的模块模板的建模方法,将桥架整体结构划分为数个相对独立的模块,每个模块模板涵盖对应模块大部分甚至所有的设计信息,并具有高度的开放性.在此基础上,建立以模块模板库为核心的起重机桥架模块库,开发重机桥架模块以及整机设计系统,实现高效有序的设计重用.     

基于广义模块化的破碎机械快速设计系统的开发

为了快速响应破碎机械市场的需求,缩短产品开发周期、降低设计成本,以破碎机械为研究对象,结合破碎机械的设计特点,运用广义模块化设计理论,以柔性模块代替传统模块,提出产品模块、模块接口划分等方法,通过分析破碎机械广义模块化的设计流程,构建了快速设计系统的总体框架,并运用Visual Studio 2008,SQL SEVER 2000和Solid-Works二次开发工具建立破碎机械的模块库和零部件库.开发了以SolidWorks为平台的破碎机械快速设计系统,并验证其可行性.     

基于知识集成的系列起重机快速设计研究

针对系列产品重复设计、创新性低的问题,提出了基于知识集成的产品快速设计.根据桥架知识集成的特点,研究了桥架的设计体系、设计过程以及设计方法.分析了桥架的编码知识、模块接口知识,总结出桥架的模块化主结构和配置设计结构.在桥架全息建模的基础上,结合过程知识、数据库知识、文件知识等知识的表示方法与获取手段,采用装配草图、装配方程集、约束集等集成的方式,建立了包含参数驱动的知识集成模型.与模块化参数化技术相结合,实现了桥架知识的重用与系列产品的快速设计,并以实例进行验证.结果表明,该方法较好的满足了实际应用的需求.     

桥式起重机车轮组参数化设计系统的研究

在大规模定制化的条件下,为了提高起重机生产企业对市场变化的快速响应能力,通过运用广义模块化设计理论,并根据桥式起重机车轮组的结构功能特征进行模块的划分,建立各个模块的模版,结合参数化的设计方法,开发了起重机车轮组的参数化设计系统,并结合实例进行了验证。该设计系统缩短了起重机车轮组的开发周期,提高了设计效率和质量,能够对市场多样化、个性化的需求做出快速响应。     

液压机广义模块化设计原理及其应用

针对液压机的设计特点,分析了传统模块化设计的不足之处,提出了模块化、参数化和变量化集成设计的广义模块化设计方法。给出了液压机广义模块化设计的基本原理,并对广义模块划分、模块结构参数化和变量化分析等关键技术进行了论述。最后,通过一个液压机模块的设计实例,进一步说明了广义模块化设计的特点。     

基于广义模块化的半挂油罐车快速设计系统的开发研究

为了提高半挂油罐车的设计质量,缩短开发周期,降低设计成本,结合半挂油罐车自身结构特点,运用广义模块化设计理论,提出产品模块划分,结构分析及接口设定等方法,分析半挂油罐车的总体结构,设计半挂油罐车的总体架构.用UG/OPEN、Microsoft C++6.0和SQL Server 2007开发工具,建立半挂油罐车的模板库和部件库.开发了在UG环境下的半挂车油罐车快速设计系统设计模块,并验证其可行性.     

基于模板模块的机械产品广义模块化设计模块编码系统

针对广义模块化设计的特点，分析了广义模块化设计中模块编码的目的、原则和编码对象，并总结了其模块化编码所需的相关信息，由此给出了广义模块编码的一般过程，最后以液压机模块化设计编码为实例进行了验证。     

卧式加工中心模块化设计技术及其应用

在分析卧式加工中心自身结构特征的基础上,应用广义模块化设计和基于实例推理技术,提出了一种基于实例推理的卧式加工中心广义模块化设计方法,建立了卧式加工中心模块编码体系,并根据卧式加工中心主轴及其各模块的静动及热态特性要求引入了基于有限元原理的结构分析及优化,最后论述了卧式加工中心模块化设计系统功能结构与开发技术。提出并实现了一种模块化设计系统,该系统有效的集成CAD/CAE系统,事实表明对产品设计有着一定意义。     

桥式起重机桥架附属结构的模块化设计

我国桥式起重机桥架附属结构的设计大都采用单件定制设计,工作量大且效率低、周期长。文中将模块化理念引入到桥式起重机桥架附属结构的设计中,对桥架传动侧走台、栏杆以及斜梯等主要部件进行模块划分,并采用三维实体建模软件进行模块化参数化设计,从而实现桥架附属结构的快速设计、出图,化"定制设计"为"预设计",提高了设计效率.     

基于实例推理的磁材压机模块化设计研究

模块化设计通过不同功能模块的划分与组合,快速设计出满足用户需求的新产品,已成为快速设计的重要方法和核心技术。将基于实例推理技术应用于产品模块化设计,可以解决设计过程中对整体方案检索能力不足的问题,使得产品设计方法更合理、更高效。以磁材压机为例,论述了基于实例推理的机械产品模块化设计流程,并对其模块划分、实例库创建、相似度计算、有限元分析等关键技术做了详细研究,为此类产品的快速设计提供了一定的参考价值。     

门式起重机广义模块化设计系统的研究与实现

简述了广义模块化设计的基本概念,在此基础上,采用Visual Basic 6.0为编程工具,Access数据库作为数据支持,利用ADO数据库访问技术,以三维CAD软件SolidWorks为平台,建立了门式起重机广义模块化设计系统。该系统可以根据用户的需求信息快速生成门式起重机的设计方案,为企业快速响应用户需求、有效减轻设计工作量提供了有效的工具,具有很强的适应性和灵活性。     

基于资源模型的单元控制器

为了使制造单元能够加工新产品,使用新设备和新工艺,要求制造单元能够被快速地重构。单元控制系统必须具有更高的柔性才能适应这些要求。本文提出了模块化的可重构的基于资源模型的单元控制软件结构,提出了基于通用消息传递的控制系统通用模型。为了实现内部资源的通用部分,利用Ｐｅｔｒｉ网建立了内部资源的通用模型。     

A generic intelligent control system for grinding

The achievement of accuracy in precision machining depends on the ability to take account of system deflection. The application of intelligent control to grinding processes is a way to achieve a desired workpiece size and surface integrity. A generic intelligent control system for grinding has been developed based and implemented on a commercially available CNC grinding machine. The implementation has been shown to be successful. The paper describes the object-oriented development of the generic intelligent control system for grinding based on the proposed modular conceptual framework for adaptive grinding control, reviews previous work towards intelligent grinding control, summarises the previously used adaptive strategies and introduces the structure and operation of the generic intelligent control system. Finally, the problems encountered during the system development are discussed.     

Intelligent sensor system communication for robot workcell integration

The sensing systems for flexible automation and robotics systems are increasing in complexity and require more data processing. Dedicated microprocessors and stand-alone sensor systems are being used more often to relieve the increased processing burden. This leads naturally to a modular approach for building systems. A system comprising interchangeable ‘Intelligent Sensor Modules’ is presented, along with a set of possible algorithms and methods for inter-modular communication. As an example of the modular approach, the generic task of inserting a peg from a random orientation is implemented by constructing a simple modular system (consisting of a microprocessor controlled tactile array sensor, a robot, and a host microcomputer) by using the techniques presented herewith.     

Process Variety Modeling for Process Configuration in Mass Customization: An Approach Based on Object-Oriented Petri Nets with Changeable Structures

Mass customization strategies could be usefully deployed by companies whose products are characterized by a modular design. Typically, each module serves a specific aspect of the overall product function at varying performance levels. Each product variant (constructed through a unique combination of modular performance levels), therefore, serves to customize the overall performance of the product, thus serving the unique needs of each customer. The high demand for each module guarantees economies of scale and, eventually, low cost to customer. The rationale of configuring production processes for producing individual product variants originates from the fact that massive process data is commonly available in a firm and there exists a generic process structure underlying the production of similar products in a family. To design a decision support mechanism that constructs process configuration corresponding to a given product configuration, this paper develops a formal modeling of process variety using Petri nets. Object-oriented Petri nets (PNs) with changeable structures (OPNs-CS) are applied to deal with the issues of generic representation, constraints compliance, and operational sequence requirements. Object-oriented PN (OPN) models facilitate generic representation of product and process variety as well as their instantiations. The OPNs-CS model is tested with simulation. Based on simulation results, the optimal configuration of production processes can be determined for each individual product as well as the cohort of a product family. To illustrate the feasibility and potential of OPNs-CS based process variety modeling, a case study of process configuration for mass customized textile spindles is reported.     

Maintenance Integration in Manufacturing Systems: From the Modeling Tool to Evaluation

In manufacturing systems, wear-out and eventual failure are unavoidable. However, to reduce the rate of their occurrence and to prolong the life of equipment or the capacity for extended productive use of the equipment under the necessary technological functioning and servicing, maintenance can be performed. For large manufacturing systems, maintenance integration involves a particular development concerned with both complexity models and computing time. This paper presents an effective way of modeling complex manufacturing systems through hierarchical and modular analysis by using stochastic Petri nets and Markov chains. In the proposed approach, the integration of maintenance policies in a manufacturing system is facilitated by the development of a generic model. With this generic modeling, the user doesn't need to code the strategies but only to instantiate the generic model with the structure of the manufacturing system. This method allows various maintenance strategies to be coded in the generic model with the aim of studying their influence on system dependability and performance.     

Modular architecture model of CSCD system

A modular architecture model of a computer-supported collaborative design (CSCD) system is proposed on the basis of the hierarchical structure characteristics of a distributed collaborative design system and advanced component object technology. The model mainly regards the module as the core organizing and managing design objects and uses the common object request broker architecture (CORBA) specifications as an interactive platform to achieve object communication. The browser/server computing model deals with the remote heterogeneous collaborative design problem. Product design strategies and mechanisms for collaborative design are separated to facilitate the application of distributed collaborative design environment for quick implementation. The open design framework for CSCD system developers can support the implementation of distributed collaborative design to improve product design speed and reduce product development time. The modular CSCD system (MCSCDS) model and its implementation are achieved in the modular CSCD, a prototype system.     

计算机辅助组合夹具管理系统

通过对组合夹具拼装过程中存在问题的分析,结合组合夹具拼装工艺,介绍了计算机辅助组合夹具管理系统的设计方法和相应的软件实现思想,并以某夹具拼装站的要求为例,详细地论述了用PowerBu ilder和O rac le研制的组合夹具计算机管理系统。该系统具有较好的推广应用价值。     

组合夹具计算机三维智能组装系统

将CAD和人工智能技术引入组合夹具设计中，可以提高生产效率、减轻劳动强度、缩短生产准备周期和加快产品上市时间。介绍了组合夹具计算机辅助设计的发展情况和研制的智能型组合夹具计算机辅助组装系统的结构及其功能，重点对系统中的智能模块做了阐述。     

A CAD-based visual simulator for designing flexible automated material handling and transportation systems

A software system is presented for simulating the behaviour of an automated material handling and transportation system typically used in flexible manufacturing. The program is written in the UPL language on top of a commercially available CAD system. It makes use of a discrete event simulation model written in ECSL to generate a schedule of events defining an animation scenario. The program relies on a graphical library of modular component elements that enable structured automated material handling and transportation system elements to be created. The motion patterns are generic and are implemented as procedures that can be associated with any entity as required. Motion employs the concept of entity associativity within the CAD environment in order to apply the same motion patterns to groups of entities. The latter retain, however, their individual motion specification. Advantages of the program include inherent integration with CAM, availability of a host of parent CAD facilities and thus ability to visualise facility performance and to appraise design in detail.