介观尺度微型铣床开发及性能试验

针对微机电系统(Microeletro mechanical system, MEMS)技术和超精密加工技术局限,开展面向介观尺度微细铣削技术的研究。首先根据介观尺度铣削的加工特点,对其机理研究的关键问题进行详细的分析和讨论,提出微细铣削理论的研究重点及研究方法。然后在分析微细铣削成形条件和加工要求的基础上,开发微型铣床系统,并对系统各组成子系统及性能指标进行描述。最后开展机床加工性能评估试验,通过精度测量、误差分析和误差补偿提高工作台的定位精度达到1.62 μm,采用直径0.127 mm铣刀开展微铣削试验,通过表面粗糙度测量和同心圆切削试验评估机床的加工精度,在此基础上通过复杂零件加工实例进一步说明机床的加工能力,论证小型化机床加工技术的可行性和实用性。     

高精密微细切削加工机床的研制

微细切削技术的发展离不开微小型化机床设计和制造技术的发展,然而微细切削加工的高精度对微细切削机床的性能和设计提出了更高的要求。因此,针对微细切削机床设计和研制的特点,自主研发了一台微小型切削加工机床,该机床可应用于微细车削、刨削、飞切等加工方式。其设计理念是,利用大理石气浮导轨结合精密直线电机技术,提高机床的精度和加工稳定性。     

微型机床的结构动态特性分析

利用有限元和实验的方法,对微型机床试验台进行了结构动态特性分析。通过实验测试数据与理论计算结果对比分析,验证了有限元模型的合理性,并对测试及计算中造成误差的因素进行了讨论,为后续的微小型化机床系统动力学研究奠定基础。     

圆管式直线电动机在并联机床上的应用

分析并联机床的特点以及伸缩杆的驱动方式,介绍了圆管式直线电动机的运行原理及优点;指出这种直线电动机在并联机床应用的方法、可行性和应用前景。     

微细电火花加工装置及加工工艺的研究

为适应现代加工小型化的需求,在开发微型电火花加工装置的基础上,通过加工微孔、微轴及微三维结构,对加工工艺进行系统研究;分析RC脉冲电源中参数R、C对加工效率、电极损耗比和表面质量的影响;验证电火花伺服扫描加工微三维结构的可行性.     

基于微机电系统加工技术的微小型矩形离子阱的研制

矩形离子阱(RIT)不仅具有线性离子阱(LIT)捕获效率高和存储容量大等特点,还兼具圆柱形离子阱(CIT)易加工和装配的优点,具有小型化的优势.为了使RIT进一步微小型化,本研究采用微机电系统(MEMS)和激光切割技术加工微小型RIT,并通过模拟仿真分析RIT的各项参数与其内部电场成分的关系.结果表明:固定离子阱非出射...     

机床液压系统的模块化设计

论述了模块化设计在机床液压系统中的可行性、优点以及组合方式,并引用了实例加以说明.     

微小型组合锁原理样机的研制

报道了一种微小型组合锁原理样机的研制情况和结果。介绍了原理样机的系统结构设计、专用微小型电磁电机的设计与开发、UV-LIGA微细加工零件、控制电路、样机装配等内容。研制的原理样机外形尺寸小于15mm×20mm×25mm,功能满足设计要求,证明了装置系统设计的可行性,验证了微电机、微机械加工在组合锁装置微小型化中的应用价值。     

基于C8051F016的火炮拉线机床数字化改造

针对目前工厂使用的拉线机床操作不便、可视性差的弱点,提出了一种采用现代微控制技术、光电编码技术及步进电动机的单片机控制技术对带长靠模拉线机床进行数字化改造的方案.详细介绍了硬件电路及程序软件的设计,并对机床模拟数控装置的调试结果作了数据分析,进而证实了方案的可行性.     

基于GO法的机床液压系统故障诊断方法研究

在深入分析某机床液压系统故障机理的基础上,运用故障树分析原理建立了机床液压系统的故障树模型。针对GO法在分析系统可靠性方面的优点,建立了机床液压系统的可靠性诊断GO模型,并给出了具体的可靠性定量计算及故障模式分析的方法。实例分析验证了模型与方法的有效性与可行性。     

小型数控微细铣床的研制及铣削试验研究

总结了现有微小零件加工技术的局限性,阐述了微细铣削加工的优势,并自主构建了一台适于微小零件制造的小型三轴数控微细铣床,铣床本体尺寸为400mm×400mm×260mm,工作空间为50mm×50mm×50mm。介绍了组成微细铣床的六大子系统的性能,对微细铣床系统进行精度测试,该铣床的定位精度达到1μm,满足微细铣削加工的精度要求。使用硬铝LY12进行微直槽及薄壁、微同心圆槽的铣削加工试验。加工试验结果显示:该微细铣床已经具备加工介观尺度的高深宽比微小零件的能力。     

Formation of iron aluminide coatings on plain carbon steel by TIG process

Micro end-milling is widely used in many industries to produce micro products with complex 3D shapes. The accurate modeling and prediction of surface roughness are important for evaluating the productivity of the machine tools and the surface quality of the machined parts. This paper presents an accurate surface roughness model based on the kinematics of cutting process and tool geometry by considering the effects of tool run-out and minimum chip thickness. The proposed surface roughness model is validated by micro end-milling experiments with the miniaturized machine tool. The results show that the proposed surface roughness model can accurately predict both the trends and magnitude of the surface roughness in micro end-milling.     

微细铣削机床系统构建及微小型零件加工实验研究

研制了一台由直线电机运动平台、高速空气静压轴承电主轴和DMC-1842运动控制卡组成的三轴联动微细铣削机床,构建了基于IPC机和Windows操作系统的并行双CPU数控系统。以C#为开发语言,采用模块化设计方法开发了微细铣削控制软件,并设计了合理的人机界面。在三轴联动微细铣床上进行了微小型零件的加工实验,验证微细铣床数控系统的性能。结果证明数控系统的软硬件设计方案可以满足微细铣床加工的要求,验证了微细铣削加工技术的可行性和实用性。     

微型化制造设备与微型制造系统

介绍了微型机床与微型工厂概念提出的背景和科学意义，综述了目前微型工厂／微型制造系统的研究发展概况，探讨了制造设备与系统微型化的关键问题，指出了一些需要开展的研究方向，并提出了几项建议。     

制造设备与系统的微型化技术

微型工厂是小型产品制造系统的一个创新概念.本文介绍了微型工厂概念提出的背景和科学意义,阐述了目前微型工厂微型制造系统的研究发展概况,探讨了制造设备与系统微型化技术的关键问题,并且提出了一些需要开展的研究方向.     

A function integrated and intelligent mechanical interface for small modular machine tools

A modular structure is essential for versatile, reconfigurable micro machine tools to meet future requirements and to achieve flexibility. Therefore, to exploit modularity, the design of a function integrated, intelligent mechanical interface is presented in this paper. The interface is based on a six-point mounting and a switchable permanent magnet system guaranteeing high precision. Thus, various machine tool modules can quickly be coupled to functioning units without tools and further adjustments. Energy supply, information transfer and data processing are also incorporated, without diminishing precision. The interface characteristics are analytically described. Simulation and experiments show performance and feasibility for micro manufacturing.     

Development of meso-scale milling machine tool and its performance analysis

To overcome the shortcomings of current technologies for meso-scale manufacturing such as MEMS and ultra precision machining, this paper focuses on the investigations on the meso milling process with a miniaturized machine tool. First, the related technologies for the process mechanism studies are investigated based on the analysis of the characteristics of the meso milling process. An overview of the key issues is presented and research approaches are also proposed. Then, a meso-scale milling machine tool system is developed. The subsystems and their specifications are described in detail. Finally, some tests are conducted to evaluate the performance of the system. These tests consist of precision measurement of the positioning subsystem, the test for machining precision evaluation, and the experiments for machining mechanical parts with complex features. Through test analysis, the meso milling process with a miniaturized machine tool is proved to be feasible and applicable for meso manufacturing.     

Development of meso-scale milling machine tool and its performance analysis

To overcome the shortcomings of current technologies for meso-scale manufacturing such as MEMS and ultra precision machining, this paper focuses on the investigations on the meso milling process with a miniaturized machine tool. First, the related technologies for the process mechanism studies are investigated based on the analysis of the characteristics of the meso milling process. An overview of the key issues is presented and research approaches are also proposed. Then, a mesoscale milling machine tool system is developed. The subsystems and their specifications are described in detail. Finally, some tests are conducted to evaluate the performance of the system. These tests consist of precision measurement of the positioning subsystem, the test for machining precision evaluation, and the experiments for machining mechanical parts with complex features. Through test analysis, the meso milling process with a miniaturized machine tool is proved to be feasible and applicable for meso manufacturing. __________ Translated from Chinese Journal of Mechanical Engineering, 2006, 42(11): 162–167 [译自: 机械工程学报]     

Precision grinding of components for aerostatic micro guidance

The work described in this paper deals with a micro grinding process development for components of a guiding system with active micro actors. Starting with the selection of a machine tool concept, investigations with different tool specifications as well as process kinematics and parameters are performed. Thereby the process is characterised by resulting shape accuracy and surface quality of the workpiece. By using an ultra precision machine tool and fine grained grinding wheels a shape accuracy within the submicron range and high surface qualities can be achieved.