现代光学技术在包装与印刷中的应用

包装作为我国的一种重要的经济产业，其发展前景可观。论述了现代光学在印刷工艺、全息防伪包装、电子出版、纸张计数、条形码等方面的应用。激光技术在包装与印刷中的应用无疑会推动包装技术的迅猛发展。必将会有重要的经济效益和社会意义。     

数字修描技术在包装印刷图像处理中的应用研究

从数字修描技术本身的特点、算法出发,结合包装、印刷中图像处理的特点,介绍了该技术在包装印刷中的应用.     

珠光油墨在包装纸印刷中的应用

从珠光油墨的成分、调配、应用等角度,探讨了珠光油墨在包装纸印刷中的应用,并且阐述了珠光油墨在使用中的注意事项,回顾了珠光油墨的最近发展,并展望了其在包装印刷中的广阔应用前景.     

推动印刷现代化进程的激光技术

着重阐述激光调制扫描技术在现代化印刷中的重要作用，并分别从计算机直接制版和数字化印刷两方面介绍。从而进一步加深对数字化印刷的理解。     

激光焊接技术在船舶制造中的应用及展望

激光焊接具有焊接效率高、接头变形小、焊缝成型好等优点,是现代工业生产中不可缺少的先进制造技术。本文对激光焊接技术在船舶制造中的应用现状进行了简述,并从焊接设备集成化、焊缝形状预测及焊接过程实时监测与控制三方面对激光焊接技术的后续发展提出展望。     

激光调制在现代化印刷中的应用

着重阐述激光调制扫描技术在现代化印刷中的生命作用,并分别从计算机直接制版和数字化印刷两方面介绍,从而进一步加深对数字化印刷的理解。     

聚合物材料在快速原型制造技术中的应用

介绍聚合物材料作为成形原料在主要的快速原型制造(RPM)工艺中的应用情况.具体按照立体印刷成形(SLA)、层合实体制造(LOM)、选域激光烧结(SLS)及熔融沉积造型(FDM)这4种工艺的不同,阐述与各工艺对应的聚合物材料的种类、聚合物材料成形过程中可能出现的问题及解决方案.总结了聚合物材料原型的应用情况和聚合物材料在RPM技术应用中存在的问题.     

静电辅助移墨装置的原理及在凹印中的应用

静电辅助移墨装置在现代凹版印刷中发挥越来越重要的作用.分析了凹版印刷中网点丢失的原因和静电移墨装置的优点及其对凹版印刷质量提高的作用,并着重分析了静电移墨装置的原理及在实际应用中容易出现的问题.     

印刷企业中“客户关系管理”运用的背景分析

随着计算机技术和互联网技术在印刷行业中的广泛使用,从市场环境的变化、印刷行业本身发展的需要、客户复杂多变的需求等方面分析,在现代印刷企业中客户关系管理的实施是非常必要的。     

纸张数字印刷工艺及质量的研究

设计了数字印刷原稿,通过改变数字印刷的参数得到印刷样张,从实地密度、相对反差、叠印率、网点增大等方面,研究油墨浓度、激光强度两个因素对印刷质量的影响。油墨浓度和激光强度对印刷质量的影响曲线,为数码印刷工艺的进一步研究提供理论和实践依据。     

A heterodyne laser interferometer for dilatometer measurements

A dilatometer measuring system based on heterodyne laser interferometry is described. An electrooptical light modulator based on the double transverse Pockels electrooptical effect in a crystal of lithium niobate and operating in the quarter-wave mode is used as the optical heterodyne. The electronic measuring system uses modern microelectronic components with a high degree of integration.     

Design and performance analysis of a novel parallel servo press with redundant actuation

The large capacity servo press is traditionally realized by means of simultaneous actuation of multiple motors. But there exist the over-constraint problem and interference among actuators, which increases the control difficulty and product cost. This paper proposed a novel parallel servo press with redundant actuation, which can avoid the over-constraint and actuation interference. The kinematic and dynamic model of the present servo press are established and thus the kinematic and dynamic performances are obtained under three working modes, i.e. the same and opposite direction modes and non-synchronous mode. The prototype of the active mechanism with the redundant actuators has been manufactured. The kinematic experiments are carried out by using API laser tracking system and the theoretical calculation results agree with the measured data very well, which validates the theoretical model and the present press mechanism.     

关于牙膏纸箱堆码压力与整体蠕变变形可靠性研究

通过牙膏纸箱堆码整体蠕变的实验数据，利用可靠性理论，统计出在一定堆码层数下，最底层牙膏纸箱所受的堆码压力与纸箱整体蠕变变形之间的可靠性关系。     

On the weld strength of in situ tape placed reinforcements on weave reinforced structures

Unidirectionally reinforced thermoplastic tapes were welded onto woven fabric reinforced laminates using a laser assisted tape placement process. A mandrel peel setup was used to quantify the interfacial fracture toughness between the tape and the laminate as a measure for weld strength. The tape placement process was compared to a conventional press molding process in terms of interfacial fracture toughness. The tape placed specimens were found to outperform the press molded specimens. Additional experiments were performed to investigate the influence of the degree of crystallinity and the process induced weld interface on the measured fracture toughness.     

从印刷技术的发展看印刷业的重新定位

近20年以来的技术革命使印刷业发生了脱胎换骨的变化，曾经被认为是技术含量低、员工文化素质低、劳动密集型的印刷业已今非昔比。世界上最先进的电子技术、激光技术、计算机技术及网络技术在印刷领域广泛地应用与发展，改变了人们对印刷的传统思维和行为。在信息时代的今天。印刷业已经成为信息社会的先行行业。在新的形势下，印刷业的经营既离不开生产又离不开增值服务，全面解决方案的推行使印刷业的外延扩大到了第三产业。     

现代机电设备的网络结构及其在高速无轴多色印刷机中的应用

简要介绍当前制造自动化网络技术的工,着重论述现代机电设备网络结构的总体设计方案,并以调整无轴多色印刷机为实例,说明它在实际系统中的应用。     

一种基于图像处理的万能工具显微镜测量新方法

在分析传统万能工具显微镜及现代数字化仪器优缺点的基础上,提出了一种基于图像处理的万能工具显微镜的测量方法。该方法将图像处理技术与基于FPGA和单片机的光栅测量技术相结合,在保证原有仪器的准确度高、抗干扰能力强、稳定性好、应用范围广优点的基础上,运用AutoCAD二次开发技术实现对长度、角度、圆直径等几何量的精密测量,提高了测量效率和精度,降低了操作人员的劳动强度。经过与双频激光干涉仪的测试结果进行比较,证明提出的方法具有较高的重复性和测量精度。     

激光复合织构薄壁弯管模具成型试验

目的研究激光复合织构薄壁弯管模具的成型性能。方法分析模具与管件的摩擦对弯管成型的影响规律。利用激光毛化和微造型技术对弯管模具的夹块、压块、防皱板进行表面复合织构,完成了绕弯成型对比试验,采用直接测量法对成型件的外壁减薄率和截面畸变程度进行检测,结果弯管模具经过复合织构后,成型件外壁减薄率降低了0.5%~4.5%,截面畸变程度减轻了0.8%~2%,对于表面质量较好的不锈钢管,激光复合织构弯管模具能够使成型件表面保持较低的表面粗糙度和良好的光泽度。结论将激光复合织构技术应用于弯管模具,能够显著提高成型管件的质量。     

Tablet Press Automation: A Modular Approach to Fully Integrated Production

Fully automated tablet production is an exciting and emerging trend in the pharmaceutical industry. Improved tablet quality, manufacturing efficiency, and process validation are major reasons for the increasing emphasis on automated technology. This paper outlines the vast options and possibilities associated with tablet press automation and presents a specific modular approach in which the extent and time flame for the automation transition is dictated by the tablet manufacturer. This modular approach uses the tablet press control system as the central building block on which a variety of control modules are constructed to facilitate automated material flow, data collection, and remote process monitoring. The emphasis is placed on design flexibility due to the fact that each company will construct a unique definition of automation, which may be subject to change as various phases of automation are implemented and evaluated.     

Application of variable‐structure system in dc‐motor velocity‐control

Abstract

The most important characteristic of variable‐structure system (VSS) is its insensitivity to parameter variations in the sliding mode. In this paper three methods of VSS are used to implement DC‐motor velocity‐control. The conventional VSS uses only a sliding line. The adaptive VSS uses multiple switching lines. The modern method uses a sliding curve. The modern method makes a system trajectory following the sliding curve which has been set up in the controller from the initial state to the origin in the phase plane. Hence it is insensitive to parameter variations from the initial state to the steady state. If parameter variations are the most critical factors, then the modern VSS is the right method to be considered to overcome the problem of parameter variations.