基于一种多功能小型机床的模型原理的研究

本毕业设计为研发一款新型的多功能小型机床,旨在用一台小型机床一次性的完成精密小型工件的多道工序的精确加工。本机床完全能够完成钻、铣、车、磨等多道工序,同时配有手动和自动换刀装置,操作过程多样;避免了购买多台机床所需要的成本;同时省去了拆装时间;提高了生产效率。     

一种多功能小型机床的调查研究

针对机床现状进行多功能机床的功能、性能和可靠性方面的改进使其具有更强的市场竞争力,加速一体化机床的技术发展。这种小型机床一次性的完成精密加工小型工件的多道工序的精确加工。本机床完全能够完成钻、铣、车、磨等多道工序,同时配有手动和自动换刀装置,操作过程多样;避免了购买多台机床所需要的成本;同时省去了拆装时间;提高生产效率。     

新型多功能小型机床的研究与设计

本产品为一款新型多功能小型机床,旨在于可以在一台机床上一次性完成对精密小型工件多道工序精确加工。因此,本机床能够完成车、铣、钻、刨、磨五道工序,同时再加手动和自动换刀的配合,使操作过程更加多样,既节约购买多台机床所需要的成本,又省去不少拆装时间,提高了加工效率。     

多功能小型机床的数控加工操作

多功能小机床的数控操作技术是指用数字、文字和符号组成的数字指令来安实现一台或者多台机床设备动作控制的技术。本文基于多功能小型机床的设计与研发,是多功能小型机床实现钻、铣、车、磨等多道工序的操作,进而完成对物品的加工功能的说明。     

毛巾半成品车间计算机监测系统

毛巾生产是多品种多花色同时进行的,其半成品的生产流程如图1所示,在半成品车间中,从草坯到后处理分别由七台机台独立完成.由于各机台生产速度不同,无法串接成一条完整的流水生产线,各机台之间依靠周转车子来连接,不能准确统计装载毛巾的数量.工厂管理人员对半成品车间中七道工序的生产情况不明,往往凭经验指挥生产,造成人力、物力的浪费.     

SINUMERIK 840D数控系统在改造数控仿形铣中自动换刀程序的设计

<正>一台95年法国FOREST-LINE公司制造的龙门式3+2轴数控仿形铣加工中心,因机床的MUM760F数控系统严重老化,导致机床故障率高,加工精度差,同时由于数控系统内部功能的缺乏,导致某些特殊型面的加工无法完成,满足不了加工需求。因此需要对该机床的数控系统进行改造,经过系统选型和方案比较,     

机构介绍

中国科学院长春光学精密机械研究所是光、机、电综合技术研究所.1976年,光机所研制出第一台CO_2激光数控切割机床.已在汽车工业中应用.最近又研制成功一台新型快速轴流CO_2激光数控切割机床.现已有产品对外出售,并建立了激光加工中心,对外承揽加工.激光加工中心可完成多品种、小批量、形     

数字特技切换台AG--MX70及其在实践中的应用

本介绍一种适用于小型数字演播室．数字编辑系统的多功能数字特技切换台AG-MX70，它具有混合、切换、特技、调音、彩色校正、字幕等比较完善的功能，同时介绍了它在中小型数字演播室现场直播系统和数字编辑系统的应用。     

科技进展

一种特制的照相机对准了一台处于工作状态的机床,从拍摄的照片上可以看到机床外表的不同部位有疏密不等的条纹,科技人员根据这些条纹可准确判断出机床各部位变形情况。西安交通大学研制的这种光全息散斑照相机是国家“七五”重点攻关项目,目前在西安通过国家级鉴定。西安交通大学机械系谭玉山教授领衔主持了这一技术的实用化和商品化的研究,完成了这一带有自动程控记录器、激光频闪仪、条纹     

基于S7-300PLC的普通卧式车床的改造

卧式机床已广泛地应用于机械加工中,可以加工很多螺纹和端面的同时,也存在诸如电气控制接线多、故障率高、功耗大和生产效率低等缺点。本文正是立足于此,应用西门子公司的S7-300系列的PLC对普通的卧式机床进行部分改造,完成在保留卧式机床原有优点的同时,改善上述缺点的目标。     

Cutting force control of milling machine

In metal cutting processes, an effective control system, which depends on a suitably developed scheme or set of algorithms can maintain machine tools in good condition. In this paper, an approach is developed for cutting force control of CNC machine. Several linear models are identified based on different working conditions. A dominant model plus uncertain terms is derived from these model set, to yield the necessary and key information from the system. Subsequently, it is used as a state estimator, and robust control is carried out by using the observed variables and cutting force. The developed approach is applied to a milling machine center. Examples taken from experimental tests shown that the developed approach is effective for the uncertain CNC machine.     

片式薄膜电容切片工艺及设备研究

在多种电子元器件中,电容器是使用面最广和用量最大的电子元件。片式薄膜电容器是由薄膜电容条切割而成,切片工艺是片式薄膜电容器生产中的关键工艺。介绍了叠层薄膜电容器的生产工艺。着重论述了切片工艺研究内容,并根据研究所得工艺开发出了相关设备,对设备的关键技术提出了解决办法。     

VMScan: an out-of-VM malware scanner

The harm caused by malware in cloud computing environment is more and more serious. Traditional anti-virus software is in danger of being attacked when it is deployed in virtual machine on a large scale, and it tends not to be accepted by tenants in terms of performance. In this paper, a method of scanning malicious programs outside the virtual machine is proposed, and the prototype is implemented. This method transforms the memory of the virtual machine to the host machine so that the latter can access it. The user space and kernel space of virtual machine memory are analyzed via semantics, and suspicious processes are scanned by signature database. Experimental results show that malicious programs can be effectively scanned outside the virtual machine, and the performance impact on the virtual machine is low, meeting the needs of tenants.     

Detection of tool deflection in milling by a sensory axis slide for machine tools

Previous publications regarding the project Gentelligent Components for Machine Tools of the Collaborative Research Center 653 presented the design of a new sensory z-slide for a 5-axis machining center. Equipped with several strain sensors, the new slide is able to feel the machining process by measuring the process forces and vibrations. Here, a challenge is the detection of mechanical strains in the slide without degrading its high global stiffness. The application of micro strain gages in small notches on the slide represents a promising approach for the improvement of the sensitivity as well as the integration of sensors into the slide. This paper presents the utilization of the sensing axis-slide in a manufacturing environment. For this purpose, a first prototype of the slide is build and integrated into a milling center DMG HSC 55 linear. In this test machine, the dynamic characteristics of the integrated slide are identified with frequency response function measurements. Based on force measurements with a dynamometer, force calibration matrices are computed to calculate the forces in the machine coordinate system at the tool center point from the measured strain signals during milling processes. The force sensing with the slide allows furthermore the identification of tool characteristics such as the static tool stiffness. This parameter is estimated from the ratio of the measured contact forces and the set collision distance when moving the tool smoothly into the work piece. The known tool stiffness enables the detection of the static tool deflection from the force signals during a milling process. To compare the detected tool deflection with the real tool deflection, reference measurements on the work piece are performed using a perthometer. For further monitoring applications of the tool deflection in more complex 2.5D milling an approach to transform the measured forces from the stationary machine coordinate system into the moving tool coordinate system is presented.     

Java虚拟机内存管理与优化策略

多年以来,人们使用工具来完成任务,直到最近我们的工具才开始变得越来越聪明,并且互相连接起来。微处理器已经出现在很多日常使用的物品中,并且越来越多地和网络有了联系。J2ME目标是在具有16位或32位处理器和总量不少于约128KB的存储器的微型设备上运行JAvA程序。但由于硬件和软件方面的限制,为了给应用程序尽可能的空间和资源,让应用程序在虚拟机上流畅、稳定地运行,因而需要对这类嵌入式JAVA虚拟机进行优化处理,以提高其性能。对于JVW中代的划分、根集的确定和堆空间的分配、回收的新算法无疑能够优化虚拟机,提高其效率。     

数控机床主轴系统衰变监测技术

主轴系统是数控机床的重要组成部分,为金属切削提供切削力矩和切削速度,其性能直接影响机床的加工精度和效率。文中对数控机床主轴系统主要部件进行故障机理分析,基于故障机理设计了一种监测方案,通过外置传感器采集主轴系统主要部件的运行信息,并采用小波分析技术分析其运行信息,从而达到对主轴系统实时监测的目的。实验结果表明,文中案可以有效地检测出主轴系统主要部件的故障情况。     

PLC控制技术在数控机床维修中的应用分析

PLC控制技术因其较强的针对性可快速完成对故障部位的诊断,并进行及时的维修,较大的应用优势也为其发展提供了相应的助力。以数控机床的应用原理为维修切入点,从根本上解决维修问题,以此提升数控机床维修的效果和效率。     

激光拼焊生产线的组成及应用

本文详细介绍了激光拼焊典型成套设备-SOUTRAC型全自动激光拼焊线的设备组成及工艺流程,以及焊接部分的工作原理和焊接过程质量监控系统的工作原理.激光拼焊设备能够实现等厚和不等厚钢板的对焊,焊接质量好,节约原材料,容易实现自动化生产,在当今汽车车身制造业得到了越来越广泛的应用.