基于 NX 平台的汽车覆盖件模具网络标准件库系统

目的针对目前汽车覆盖件模具标准件库管理无序、属性信息不全面、操作重复等问题,在NX平台上开发网络标准件库系统。方法系统采用C/S模式,对标准件库进行统一管理和维护,利用属性关联技术自动对标准件赋属性。结果简化了BOM的操作,实现了BOM表的自动化生成。结论利用该系统,减少了重复设计、提高了设计效率,最后通过某汽车覆盖件的模具设计实例说明了标准件系统的可行性和实用性。     

基于统一装配模型的模架设计技术研究

 对通用注塑模具的典型模架结构进行深入分析,提出标准模架的统一建模方法,即利用冗余控制参数控制标准模架中模板的抑制与显示以及相关组件的尺寸变型实现模架统一建模,并研究了基于统一装配模型的模架设计技术．通过控制表达式、模板特征构造、自顶向下的模架装配构造、虚拟的装配定位关系、基于属性的部件识别等技术,开发出利用冗余控制参数实现模架变型设计的模架装配系统,从而实现基于统一装配模型的模架自由变型设计．     

企业信息化系统应用平台

本文分析了成套电器企业的生产特点和企业信息化应用的现状和需求状况,指出成套电器企业信息化平台应该是建立在PDM基础上的包括CAX/CAPP/PDM/ERP的综合应用平台。在这一平台构架中,PDM负责管理设计和工艺的信息集成,生成设计BOM和工艺BOM,形成ERP的基础数据,而ERP负责订单的原始信息流输入、物流和资金流。PDM和ERP通过相应的设计接口,统一数据库交换信息。并在J2EE平台下,建立企业PDM和ERP系统原型。在系统实施时,分阶段的采用模块化结构,构建了系统的企业信息化平台。作为应用示范,在较短时间内,完成了一家成套电器厂企业信息化系统的实施,并取得了显著效果。但是,关于成套电器企业的CIMS技术和企业信息化系统的研究及应用仍有待深入。     

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．     

基于SolidWorks的滑木箱参数化设计

利用传统方法设计木箱是个繁杂的工作,且效率低下。利用VisualBasic语言,并结合Access数据库,对SolidWorks软件进行二次开发,开发了滑木箱参数化设计系统。详细介绍了数据库、标准模型库的建立以及参数化设计过程,并通过实例展示了系统的具体功能,用户只要输入基本参数,系统即可生成符合要求的木箱,实现了木箱设计的程序化、自动化。     

基于设计环境的图纸BOM管理系统

随着无纸化生产模式的普及,大量工程图和BOM数据的管理成了一个重要的研究领域。论文介绍一种基于设计环境的图纸BOM管理系统,该系统以整个产品或者是整个部件的图纸为划分,基于数据库技术,直接集成于CAD环境中,免去了PDM、PLM等管理软件繁琐的流程管理,更接近设计人员的使用习惯,系统以工程图纸为数据基础,可以生成多种格式的BOM报表,通过在企业的实际应用中证明了该系统的可靠和高效。     

AutoCAD环境下压铸模模板图形库系统设计

采用AutoCAD及其内部语言AutoLISP,在AutoCAD环境下,开发了压铸模模板图形库系统.利用本系统只需输入几个基本参数,即可生成压铸模模板图形及相应的零件图.     

基于标准作业时间和仿真的装配线规划

在分析装配线规划内容的基础上,提出了基于标准作业时间及系统仿真的装配线规划方法并开发了相应的原型系统。通过建立装配操作树,定义装配操作约束,规划合理平衡的装配工位,同时生成装配作业表。以此作业表为输入,建立装配线的仿真模型,为装配线系统布置中的流参数等优化提供环境。通过这些工作,为企业制定工时定额合理的装配线,提高自主规划生产系统的能力提供途径。     

AutoCAD二次开发技术在包装标印系统中的应用

目的 为了改造弹药包装标印生产线,提高生产效率,实现弹药包装标印向自动化生产逐步迭代。方法 基于Python对AutoCAD进行二次开发,并编写弹药标印信息录入的自动化程序,从而将弹药产品信息直接生成标印信息的二维图纸。结果 该系统能够实现弹药包装信息、标志的输入和自动化生成标印信息的二维图纸,且能够根据实际需要对相关信息进行快速修改,满足自动化生产需求。结论 该系统优化了弹药包装标印的设计流程,节约了人力和时间成本,提高了生产效率,满足了工业自动化生产的需求,具有一定实际应用和参考价值。     

基于徕卡DNA03水准仪数据预处理程序设计

通过对徕卡DNA03数字水准仪数据文件格式的分析,阐明利用VB语言如何读取数据文件与转化生成水准观测手簿及测站数据信息,并调用Excel概略高程表模板,生成一个测段的水准测量外业高差与概略高程表,由平差软件读入即可进行平差处理。从外业到内业无需人工输入高差数据,减少人为数据输入误差,实现真正意义的内外业数据处理一体化。     

RADISS——面向CIMS／MIS的快速开发平台

介绍了一个ＣＩＭＳ环境下的管理信息系统的快速开发平台。该平台采用ＣＬＩＥＮＴ／ＳＥＲＶＥＲ体系结构，在ＵＮＩＸ及ＷＩＮＤＯＷＳ操作系统和支持ＴＣＰ／ＩＰ网络协议的环境下，提供了一组快速开发ＣＩＭＳ／ＭＩＳ的主包括ＭＲＰ、ＢＯＭ处理在内的集成支持环境，可以极大地提高应用系统的开发效率，缩短应用系统的开发周期，并使应用系统具有较好的集成性和开放性。     

Evaluating in-vessel composting in treating sewage sludge and agricultural waste by examining and determining the kinetic reactions of the process

This paper presents the evaluation of the performance of an in-vessel composting system by examining the kinetic reactions of the processes developed for the treatment of sewage sludge and agricultural waste. The aim of this work is (a) to describe the composting process using a kinetic model that is based on the biodegradable organic matter losses during decomposition of the substrate, (b) to evaluate the efficiency of the bioxidation process that takes place in the system and (c) to determine the factors and the rate at which they limit the composting process. The simulation of the composting process considers a first-order kinetic model including the environmental parameters (environmental correction factors) that influence bioxidation of the biodegradable organic matter (BOM) of the substrate namely temperature, moisture content and oxygen concentration. The experimental results, recorded and monitored throughout the composting processes, were fitted using the proposed model. The results obtained suggest that the system operates efficiently by recording increased levels of BOM losses, high decomposition rates while composting limitations, due to the environmental conditions, is not significant during the main stages of the processes.     

"三表"汇总与自动生成系统的研究

分析了产品的结构和零件图纸中标题栏、明细栏的数据结构。并在AutoCAD环境下实现零件明细表、标准件表和外购件表（简称“三表”）的汇总与自动生成系统的开发,提高了设计效率,保证了图纸信息与“三表”的汇总信息高度一致,更有利于实现计算机辅助工艺设计（CAPP）。     

集成产品开发中基于BOM的集成技术研究

本文提出了基于BOM的集成产品开发环境的框架，指出了集成产品开发的几种集成方案．通过对BOM在信息系统之间的共享、交换以及信息资源的集成，阐述了BOM在产品开发中的重要作用及基于BOM的集成技术，最后给出应用实例。     

基于C／S架构的通用件图形库设计与实现

 在产品设计过程中，如何对种类多、数量大的通用件工程图样进行设计重用已经成为CAD领域提高设计效率、规范设计标准的重要课题之一．通过对目前图形库技术新需求的分析，提出基于C／S架构的通用件图形库技术解决方案．根据此方案，结合对“舾装船通用件图形库管理系统”中通用件工程图样规范化、通用件图形库的建立和通用件图形库的检索与重用三个模块的描述，说明了该系统方案的实现过程．     

基于分类和模块化的工程机械BOM构建

分析了工程机械BOM构建现状和不足,给出一种适合工程机械基于分类和模块化的超级BOM构建方案.从工程机械产品销售实际,对产品的主参数、特征参数、可选参数概念作出说明.将属于某特定型号工程机械产品的所有部件划分为公共部分、特征部分、可选部分,并建立相应部分虚拟层级.根据模块化思想,对特征部分和可选部分建立具有约束关系的选择模块.将物料分类原理应用于模块化超级BOM构建,运用Excel和VBA实现了产品编码自动生成和BOM自动构建功能.分析该方案特点并应用于工程机械产品BOM构建,结果表明,基于分类的模块化BOM构建方法简单易行、合理有效,能够快速准确构建单一产品BOM,对于工程机械信息化具有较好的参考价值.     

Polymer-ultrathin graphite sheet-polymer composite structured flexible nonvolatile bistable organic memory devices

We present data, which were obtained before bending and after bending, for the electrical bistabilities, memory stabilities, and memory mechanisms of three-layer structured flexible bistable organic memory (BOM) devices, which were fabricated utilizing the ultrathin graphite sheets (UGS) sandwiched between insulating poly(methylmethacrylate) (PMMA) polymer layers. The UGS were formed by transferring UGS (about 30 layers) and using a simple spin-coating technique. Transmission electron microscopy (TEM) measurements were performed to investigate the microstructural properties of the PMMA/UGS/PMMA films. Current-voltage (I-V) measurements were carried out to investigate the electrical properties of the BOM devices containing the UGS embedded in the PMMA polymer. Current-time (I-t) and current-cycle measurements under flat and bent conditions were performed to investigate the memory stabilities of the BOM devices. The memory characteristics of the BOM maintained similar device efficiencies after bending and were stable during repeated bendings of the BOM devices. The mechanisms for these characteristics of the fabricated BOM are described on the basis of the I-V results.     

Cherenkov masers with two-dimensional distributed feedback

The possibility of using a two-dimensional (2D) distributed feedback to generate spatially coherent radiation by straight sheet and annular electron beams is studied. The schemes of sectional Cherenkov masers with the transverse synchronization of radiation performed in a 2D Bragg structure, which is arranged at the cathode end of the interaction space and conjugates the longitudinal and transverse (azimuthal) wave flows, is analyzed. By introducing dissipation into this structure, it is possible to increase the transverse dimensions of masers to a level on the order of 10³ wavelengths with the corresponding increase in the total output radiation power without changing spectral characteristics and decreasing the energy conversion efficiency.     

Process flexibility under bill of material constraints: part II–structural properties and improving principles

For the manufacturing system that consists of multiple assembly lines, this paper investigates the method of improving its process flexibility under bill of material (BOM) constraints. Based on the flexibility measurement developed in part I, generic characteristics of the capability configuration of assembly lines that ensure it more flexible are first investigated on two hierarchical and highly interrelated levels: the assembly line level and the system level. These characteristics are termed ‘structural properties’ of process flexibility under BOM constraints, which are valuable because they provide an effective way of improving flexibility of the manufacturing system through investing in limited operational flexibility of machines in the assembly lines. According to the obtained structural properties, guidelines for improving process flexibility on the two levels are then developed. The proposed guidelines can help the manager of a manufacturing system to make effective decisions on flexibility improvement without much computation effort. Results of simulation experiments illustrate that the proposed structural properties and guidelines are effective and widely applicable to real manufacturing systems.