面向模具制造业网络化制造平台的研究与开发

为缩短模具设计、制造周期,保证可靠的模具设计、制造品质,适应制造业网络化发展趋势,研究开发面向模具制造业网络化制造平台.该平台系统是在计算机支持协同工作(CSCW)的基础上,在Windows2000 Professional的系统环境下,以产品数据库为构成框架,采用动态网页编程技术(ASP)和Java3D语言开发实现的.介绍平台系统实现的主要功能模块及关键技术.通过实例运行证明该平台系统能为模具网络化制造提供一个良好的平台.     

模具制造技术的发展方向

从技术角度来看，模具制造技术(包括设计和加工)大致可分为5个发展阶段：手工操作阶段、手工操作加机械化阶段、数字控制阶段、计算机阶段和CAD／CAE／CAM信息网络技术一体化阶段     

面向模具制造的柔性制造单元调度策略

针对模具制造过程中柔性制造单元作业任务难以合理分配的问题,以最小化工件组的完工时间为优化目标,建立了调度问题数学模型,并提出了一种遗传禁忌优化算法.最后,通过实例分析说明了所提方法的可靠性和高效性.     

高速加工技术在模具制造中的应用

阐述了在模具加工中实现高速加工所必需的一些关键技术,及高速加工技术在模具制造中的意义,并通过与常规的加工方式EDM的对比,描述了高速加工的优越性和局限性。同时以加工实例说明高速切削是现代模具加工的发展方向之一。     

基于MVC模式的模具网络化制造平台的研究

MVC模式是开发基于J2EE架构的WEB系统的一种主流模式.在建立基于J2EE的Web应用程序中,Struts和spring框架已经成为被广泛使用的框架.提出了一种轻量级的J2EE企业级解决方案,采用开源框架Spring、Struts集成开发J2EE应用,设计开发了基于MVC模式的模具网络化协作制造平台.     

计算机辅助制造在注塑模具加工中的应用

以实例说明了注塑模具前,后模3维计算机辅助制造工艺及加工方法。详细介绍了前模型腔修正铜公（铜电极）的加工方法及要求。     

MES-based management of manufacturing processes

In optimal management of short-run and one-off production, the goal is simultaneous maximization of the load on the machine tools and the speed of order completion. This entails optimal scheduling of the manufacturing systems.     

混粉电火花加工在模具制造中的应用

通过对混粉电火花加工工艺与传统模具制造工艺的比较，从混粉电火花加工工艺的机理、表面特性、影响因素等各方面来阐述，混粉电火花加工是生产高精度、高寿命、效率的模具的最有效的工艺之一。     

三维重建技术在模具制造业中的应用

提出了一种基于三视几何的三维重建方法.该方法首先利用三目视觉系统获取3幅摄像机的标定图,用十字激光器做为结构光投射器,采集重建的鼠标图;然后通过标定图求出摄像机的内外参数和投影矩阵及基础矩阵,对采集的鼠标图像进行预处理,提取出特征点,利用三焦几何原理找出相应的匹配点,求出物体空间坐标,进行拟合完成三维重建;最后,以鼠标...     

硅橡胶模具制作及浇注工艺的探讨

阐述了硅橡胶模具的制造方法和步骤,并对制作硅橡胶模具时,母样在模具中的放置、浇注系统设计、排气孔设计及制件浇注工艺进行了探讨总结,对保证制件成品率具有一定应用价值。     

模具车间作业控制系统设计

车间作业控制是制造企业MRPⅡ／ERP系统的一个重要组成部分,是MRPⅡ／ERP计划的具体实施环节。以模具生产为例,阐述了一种车间作业控制系统的功能结构和设计方法。     

简化零件的制造工艺流程

优化零件制造过程，简化零件工艺流程，可以达到缩短制造周期，降低制造成本的目的 。以新工艺替代传统工艺是发展中先进制造技术的一种表现形式，本文介绍几种在生产中业已采用的新的制造工艺和新刀具。     

Process planning considerations for micromilling of mould cavities used in ultrasonic moulding technology

The current trend in miniaturization of products and components requires appropriate technologies for the manufacture of miniature dies and moulds. The work presented here deals with the process planning of micromilling for the production of miniature mould cavities, required in ultrasonic moulding in order to reach high precision. Several aspects of process planning are addressed, including cutting tool geometry selection, segmentation of cavity geometry, minimum chip thickness, chordal tolerance, and type of interpolation. The case study involves the successful micromilling of a complex aluminium mould cavity for ultrasonic moulding. The proposed process plan is demonstrated through the micromilling of the mould cavity and silicone replicas of the miniature geometrical model. In general terms, good precision is obtained following the proposed methodology. In a randomly located set of geometric features, the dimensional error was below 5% for most features (32 out of a total of 40).     

随机生产环境下的模具制造单元资源配置

通过分析模具的生产需求情况,提出了一种模具聚类指标,应用聚类算法构造了几类典型的模具范例.通过资源静态与动态配置手段,提出了一种制造单元资源配置优化策略.针对模具生产的特点,以最小化期望工期费用为优化目标,提出了一种基于资源选择决策模型的改进型蚁群能力平衡算法,并通过生产实例,说明了该方法的可靠性和有效性.     

Automatic datum dimensioning for plastic injection mould design and manufacturing

Datum dimensioning (or ordinate dimensioning) technique is very popular in plastic injection mould drawings where the location dimensions of a large number of hole features must be specified in the drawings of the mould plates. Although commercial CAD/CAM systems provide semi-automatic tools to assist the designer in the dimensioning process, it is still a very tedious process, as the user has to specify the location of each dimension tag. This paper reports a completely automatic method where optimal placements of the dimension tags can be determined. The method employs dynamic programming technique to optimize the dimension process with respect to several criteria that can be selected by the user. The method has been implemented and incorporated into a commercial CAD/CAM system, and examples are given to illustrate the important features of the program.     

Assessing the structural complexity of manufacturing systems configurations

Modern manufacturing systems are increasingly required to be flexible and adaptable to changing market demands, which adds to their structural and operational complexity. One of the major challenges at the early design stages is to select a manufacturing system configuration that both satisfies the production functional requirements and is easy to operate and manage. A new metric for assessing the structural complexity of manufacturing system configurations is presented in this paper. The proposed complexity metric incorporates the quantity of information using an entropy approach. It accounts for the complexity inherent in the various modules in the manufacturing system through the use of an index derived from a newly developed manufacturing systems classification code. The code captures the effect of various component types and technologies used in a manufacturing system on the system’s structural complexity. The presented metric would be helpful in selecting the least complex manufacturing system configuration that meets the requirements. An engine cylinder head production system is used to illustrate the application of the proposed methodology in comparing feasible but different manufacturing system configurations capable of producing the cylinder head based on their structurally inherent complexity.     

基于快速原型的硅橡胶模具快速制造技术

介绍了快速原型制造技术的主要方法、基本原理及主要应用领域,详细地描述了以叠层实体原型为母模快速翻制硅橡胶模具的制造工艺及其相关的技术细节。