六轴印制电路板数控钻床模态分析及结构优化

利用Pro/ENGINEER软件建立了某型号印制电路板数控钻床的三维实体模型,然后利用ANSYS软件对数控钻床模型进行有限元模态分析,分析出影响数控钻床模态的关键结构和参数,并对其进行设计改进,提出了两种优化结构设计方案,对数控钻床床身原结构及两个优化结构进行分析比较,优选出最后设计方案。结果表明优化后印刷电路板数控钻床的动态性能指标和加工精度有了明显提高。     

一种双主轴六头印制线路板数控钻床的开发与应用

针对当前我国印制线路板行业数控钻床加工效率低、加工精度差等问题,提出一种双主轴六头印制线路板数控钻床结构,进行了数控钻床的机械及其控制系统的设计,并对机床原点准确返回、孔加工路径优化和机床动刚度等关键技术进行了研究。最后,介绍了该数控钻床的实际应用情况。     

基于PLC数控钻床控制系统的应用与开发

简述数控钻床和数控系统的组成,详细分析了可编程控制器,在数控钻床中的应用方式及特点,利用三菱PLC对数控钻床进行控制,详细讨论了钻床的输入输出信息,研究了其逻辑关系,并列出了部分梯形图,实际使用表明该系统获得了良好的控制效果。     

印刷电路板高速数控钻床的特点及关键技术

综述了PCB高速数控钻床的发展现状,讨论和比较了国内外主流PCB高速数控钻床的加工特点、钻削能力和动态性能等;分析了PCB高速数控钻床对电主轴、支撑、进给、控制系统、检测技术和压力脚等关键技术的要求及其发展趋势;提出我国目前PCB钻床与国外产品的差距及研发PCB高速数控钻床亟待解决的关键问题。     

摇臂钻床的数控化改造

介绍将Z3063型摇臂钻床进行数控化改造用以加工管板类零件的加工原理,数控化改造方案,在研制过程中所遇到的技术关键问题及其解决方法,本数控钻床已成功用于生产。     

基于极坐标的摇臂钻床控制系统设计

介绍了运用极坐标方法控制摇臂钻床用以扩大机床加工范围的控制技术,论述了摇臂钻床主轴箱径向运动和数控回转工作台插补运动的原理,设计了以S7-200 PLC为控制核心的硬件电路和软件程序.通过在Z3050×16(W)型摇臂钻床上应用,实现了雩件的钻削和铣削加工,实测证明系统运行结果具有可靠性、可行性和有效性.     

基于AutoCAD的可调距八轴数控钻床的研制

为解决传统钻床在塑料挤出机挤出段筛板加工时存在的效率低问题,将Visual Basic和运动控制卡设计开放式系统的技术运用于研制高效可调距八头专用数控钻床中。对现有筛板加工过程进行分析,并建立筛板加工过程中各轴之间的运动关系,提出了在AutoCAD中以DXF文件形式保存筛板零件图;通过Visual Basic编写的数控系统对待加工零件信息的读取、分析,最终结合雷塞dmc1000运动控制卡设计了可调距八轴钻床的控制系统,完成了对筛板群孔的加工。     

ZK5140C数控立式钻床

ZK5140C经济数控立式钻床,是我厂首次在国内将微机应用在方柱立式钻床上的最新产品。该系列钻床可以完成钻、扩、铰、锪、攻丝等工序,X、Y、Z三轴分别由步进电机控制,扭矩大,定位精度高。此系列机床编程简单、操作方便、使用可靠、价格低廉,适用于中小批量的一切行业机械加工。该系列机床除ZK5140C数控立式钻床外,其它产品名称为:ZK5125B数控立式钻床、ZKJ5140B数控立式钻床、ZK5140C/1数控立式钻床和 XJK5325数控万能摇臂铣床。     

印刷电路板高速数控钻床设计原则和设计方法的探讨

印刷电路板高速数控钻床作为一种超精密机械设备,有着特殊的设计原则和设计方法。探讨了其设计原则和设计方法,对比了不同结构及运动方案的优缺点。印刷电路板高速数控钻床的设计原则主要包括高精度,高速度,高刚度,高可靠性,高加工效率等原则;设计方法主要包括需求功能分析,整体布局的确定,设计方案的确定,整体结构和参数的确定。     

立式钻床的数控改装

将目前使用的普通立式钻床进行数控化改装 ,以适应壳体端盖等零部件加工 ,在生产线上取代了多轴专用钻床     

基于磁流变效应的深孔切削颤振抑制装置研究

在孔加工过程中,深孔加工机床出现的颤振会导致加工精度降低、加工效率下降、刀具与机床寿命缩短以及产生有害噪声。通过对颤振产生的机理进行分析,设计了基于磁流变效应的自适应颤振抑制装置;建立了深孔加工的动力学模型与动力学方程,并通过MATLAB Simulink进行仿真分析;在不同转速下对比安装与未安装减振器系统的振动情况,验证了该装置对颤振的抑制作用。     

基于磁流变液减振器的抑制深孔钻削颤振研究

深孔机床在钻削加工中出现颤振,会导致加工精度和效率降低、刀具与机床寿命缩短和有害噪声的产生。因此对颤振和其抑制技术的研究至关重要。通过对磁流变液效应机理以及工作原理的研究,设计出基于挤压模式的自适应磁流变液减振器,将其安装在深孔机床上。建立动力学模型并求得动力学方程,通过MATLAB的Simulink平台对动力学模型进行仿真,对比分析在不同转速下安装减振器的系统与未安装减振器系统的振动图形。结果表明:磁流变液减振器可以大幅、迅速地衰减振幅并缩短振动周期,因此自适应磁流变液减振器对机床切削颤振具有很好的抑制作用。     

一种立式机械驱动钻井泵的设计分析

卧式机械驱动钻井泵是普遍使用的钻井泵,但卧式机械驱动钻井泵易损件较多,影响钻井作业效率。为从根本上提高机械驱动钻井泵易损件寿命,介绍了一种立式机械驱动钻井泵的结构和工作原理。通过对该泵的运动学与动力学分析证实：该泵保留了卧式机械驱动钻井泵的吸排出特性,可显著提高易损件的寿命。且该泵占地面积小,更适合海上钻井作业对设备的要求。对该泵的运动学与动力学分析结果为深入进行立式机械驱动钻井泵研究奠定了一定的理论基础。     

Dynamic analysis of a PDP exhaust hole processing equipment considering glass substrate interaction

Exhaust hole drilling is one of the PDP (Plasma Display Panel) manufacturing processes to make about 1mm diameter holes for sucking out air in order to generate vacuum between two PDP glass substrates. In the drilling process, bigsized glasses about the size of a queen size bed are loaded, aligned, drilled, and unloaded, during which the dynamic interactions between glass and the handling equipment are very significant. To analyze exhaust hole drilling equipment dynamics, interaction with glass substrates that have somewhat different material properties from general glasses should be considered. The Young’s modulus and Poisson ratios of the substrates have been determined experimentally and verified via computation that simulates a well-known three-point bending test. Dynamic interaction of the glass with the handling equipment is modeled using a flexible glass and rigid body handling equipment models. The velocity profile by which the glasses are driven and the material properties of the handling equipment components contacting with the glasses are evaluated in view of the structural integrity of the glass and the operational efficiency of the equipment. The dynamic model is demonstrated to be an effective design tool for an exhaust hole drilling machine. This paper was presented at the 4th Asian Conference on Multibody Dynamics(ACMD2008), Jeju, Korea, August 20–23, 2008. Tae Oh Tak received his B.S. and M.S degree in Mechanical Design and Production Engineering from the Seoul National University in Korea in 1982 and 1984, respectively. He obtained his Ph.D. degree from the University of Iowa, USA in 1990. He is currently a professor at the Department of Mechanical and Biomedical Engineering at the Kangwon National University in Chuncheon, Korea. His research interests are multibody dynamics and sensitivity analysis.     

BTA钻床在大型管板钻孔加工中的应用

通过介绍管板的加工方法及BTA深孔钻的加工原理,阐述BTA机床在大型管板钻孔加工应用中遇到的难点,通过制定工艺方案给出解决问题的方法,使机床加工出的产品满足产品质量要求。     

Kinematic modeling and parameter identification of a new circumferential drilling machine for aircraft assembly

Automated fastener hole drilling is a key technology for low-cost and high-quality assembly of aircrafts. In this paper, a new circumferential drilling machine for fuselage assembly of large aircrafts is introduced. In order to meet the required position accuracy of drilled holes, this paper focuses on the kinematic calibration of the machine in order to improve its positioning accuracy. A modeling strategy, which combines the Denavit-Hartenberg (D-H) method and a modified version of the Hayati-Mirmirani (H-M) method, is proposed to deal with the special kinematic structure of the arc-base drilling unit of the machine. Main issues in kinematic parameter identification such as definition of objective function, calibration data selection, acquisition of initial values, and setting of convergence criteria are also discussed. Experiments of repeatability testing and kinematic calibration have been performed, and the results show that the positioning accuracy of the arc-base drilling unit is comparable to its repeatability after calibration. This suggests that the proposed kinematic calibration method is effective. Actual drilling tests have been performed on a simulated aircraft fuselage after implementing the identified kinematic model in the machine’s control software. Position errors of drilled holes are within ±0.5 mm, which meets the requirement for fastener hole drilling in the fuselage assembly of large aircrafts.     

Design of the aerostatic linear guideway with a passive disk-spring compensator for PCB drilling machine

Problems with the conventional linear aerostatic guideway for a PCB drilling machine include deviation from straightness or parallelism tolerance between the granite guideways, and thermal expansion caused by the heat generated from ball screw and the driving system. These factors will result in vibration and affect the positioning accuracy during machine drilling.This paper describes the development of the resistance network method (RNM) for analyzing the static behaviors of aerostatic grooved thrust bearing designed with a disk-spring compensator to hold the table in a suitable position. Comparison is demonstrated between the RNM results and experimental data. Finally, a realizable application of these types of bearing to the linear guideway system for a PCB drilling machine is presented.     

基于知识重用的数控深孔加工机床的快速设计

为满足多元化需求的用户对数控深孔加工机床的个性化要求,提出了一种基于知识重用的数控深孔加工机的快速设计方法。选用规则推理(RBR)与实例推理(CBR)两种方式相结合的混合推理技术进行数控深孔加工机床知识重用的研究。基于知识重用理论,根据数控深孔加工机床结构和功能的设计要求对其进行模块划分,建立数控深孔加工机床模型库。使用Visual Basic 6.0(VB)对Solid Works 2010进行二次开发,选择Access为数据库,研究快速设计系统,实现数控深孔加工机床快速化设计。     

关于石油钻井作业中钻修井机械设备发展问题的探究

基于目前我国石油钻井机设备的发展现状,对我国石油钻井作业中钻井机设备的创新及发展进行更深入的研究。主要对石油钻作业中钻修井机械设备的发展问题,进行了相应的讨论,着重介绍了目前世界范围内钻井作业对于钻井机的技术要求,并结合世界钻修井设备的发展现状,对我国石油钻修井设备的发展及完善问题进行了相应的分析与阐述,以期对未来我国石油钻修井设备的革新与发展提供相应的参考依据。