紧固件横向振动试验台的研制

详细介绍了紧固件横向振动试验台的原理、组成及各部分主要结构。该试验台具有试验周期短、可试验项目多、结构简单和成本低等优点。实践证明,该试验台能有效测试螺纹联接的防松性能。     

张力控制试验平台及监测系统的研究

论述了张力控制试验平台及监测系统的硬件配置及软件组成。详细说明了该系统过程数据的测量、多档张力的控制、数据的监测与采集等问题，并给出了基于此平台完成的单神经元自适应PID控制策略及其优化实验。     

纯电动汽车用直流无刷轮毂电机试验台架的研究与开发

为解决应用于纯电动汽车上的轮毂电机测试和试验的问题,将虚拟仪器技术应用于轮毂电机性能测试与再生制动试验台的设计中.开展了试验台组成结构、测控系统工作原理的分析,设计了测控系统电路,推导了电机转速、电机扭矩、电流、电压的测量计算公式,提出了电机再生制动试验方法及试验数据的计算公式;在此基础上采用LabVIEW开发了测控系统软件,并进行了实际运行实验.实验结果证明,该试验台设计较为合理,能够将电机的性能测试试验与再生制动试验合二为一,满足了电动汽车轮毂电机相关研究的需求.     

基于LabVIEW的滑油泵试验台测控系统设计与实现

针对滑油泵出厂前需要进行多项试验测试这一情况,以CompactRIO为测控核心,利用LabVIEW编程环境,设计开发了一套滑油泵试验台多功能、集成化、模块化的测控系统。首先,介绍了系统总体结构和上/下位机的以太网通讯;其次,给出系统各项硬件设备列表和配置;然后,采用LabVIEW设计开发上位机测控系统程序,并结合应用TDM存储方式和数据库管理系统对试验数据进行管理。最后通过投运结果,说明了该系统具有实用性和有效性。     

Development of a micro-drilling burr-control chart for PCB drilling

A drilling burr-control chart (DBCC), based on experimental results, is a tool for the prediction and control of drilling burrs for a large range of drilling parameters. A micro-drilling burr-control chart (M-DBCC) was developed for a standard double-sided copper-clad laminated (CCL) printed circuit board (PCB) with laminated fiber-reinforced plastic (FRP) substrate. This chart will assist in the selection of favorable drilling parameters for predicting and achieving preferred types of burrs. Burr classification was carried out according to the burr geometric characteristics, burr formation mechanisms, burr height, and drill bit breakage while drilling. The design of experiment (DOE) technique based on the Taguchi method was used to find the most significant drilling parameter affecting burr height. The results show that the drill diameter makes a statistically significant contribution to burr-height variation.     

钻削快速落刀装置的研制及其应用

研制结构简单、应用方便的新型钻削快速落刀装置是获取钻屑根来研究钻削变形的关键。本文对自制的钻削快速落刀装置的工作原理进行了介绍,并分析了钻削落刀装置获取钻屑根的过程。试验表明,该装置能较好地获取钻削根标本,它是研究钻削过程中的钻屑变形的重要工具。     

焓差实验台远程测控系统开发

为了实现空调器与热泵机组等系统的远程检测,以焓差法空调性能测试装置为核心,开发了一个可对多种制冷空调设备进行实时在线监测的远程测控系统。该系统结合网络监控技术,与B／S技术有机结合,解决了测试系统分散与远程监测等问题,实现了集检测、网络通讯、测试于一体的功能。在共享硬件资源的条件下,该学院可远程完成对房间空调器、风机盘管、热泵热水器机组、冰箱制冷器具等制冷空调设备的多项性能测试实验。试验结果表明,该系统可实现不同制冷设备在不同的工况下,远程监控的稳定运行。     

月球车样机实验用的松散沙土力学参数测量系统

基于地面力学理论,搭建了月球车样机实验用的松散沙土力学参数测量系统.利用该系统进行土力学压板实验及剪切环实验,对实验数据进行数理统计分析,得出松散沙土力学参数,提出松散沙土剪切模量与接地比压的线性表达式,并分析实验数据误差产生原因.利用所测松散沙土力学参数,对月球车圆柱车轮滚动性能进行理论计算,并与实验数据相比较,结果显示具有较好的预测性,证明了利用该系统及所采用的实验方法进行松散沙土参数测量的可行性.     

水平定向钻进随钻测量及方位校正研究

根据水平定向钻进角度随钻测量的要求，描述了用三轴加速度计与三轴磁强计测量地下钻头姿态-方位角、倾斜角和工具面向角的方法，针对由于钻具铁磁性材料造成干扰磁场对方位测量引入的误差，提出了利用当地地磁场进行校正的方法，详细分析了校正原理，同时给出校正步骤和仿真结果。结果表明，这种校正方法能够在不更换钻具的情况下获得准确的方位角，因此可以大大减少无磁钻铤的长度，节省钻进成本。     

深水表层钻井随钻压力温度测量仪的研制

开展了深水表层钻井随钻压力及温度监测装置研究,研制出了一种适用于深水表层钻井过程中实时测量井底环空压力、钻柱内压和井底温度的井下测量仪器,为深水表层钻井、动态压井及表层固井水泥浆设计提供指导。测量仪器已经在我国南海第一口深水井LW6-1-1井的领眼井中成功进行了应用试验,验证了其在深水无隔水管钻井条件下(高振动、低温环境、风浪流等)的机械强度、稳定性、可靠性,测量数据能真实反映钻井工况。     

机械系统交互式多功能综合实验台的设计与开发

开发了能够培养学生综合能力的多功能机械系统综合实验台，对实验台的组成原理、测试原理、功能等方面进行了详细的分析与阐述。系统采用了Visual C＋＋工具开发的软件平台，完成了传动方案的效率测试及常用机构的性能参数测试。     

数控专用铣钻床压力夹具的创新设计

介绍用系统工程方法进行数控专用铣钻床压力夹具创新设计的过程，并对其机械系统进行方案分析和评价。     

钻机起升及井下工具综合实验装置监测系统设计

本文基于组态软件与数据库技术设计了一套钻机起升及井下工具综合实验装置的实时监测系统。该系统主要由传感器、数据采集部件、总线通信接口、工控机及相应的系统软件构成。系统软件在ForceControl6.1与SQL Server 2008环境下开发,采用模块化的设计思想,主要包括数据采集模块、数据存储模块、数据处理和分析模块、报警与事件记录模块等。实践证明,系统使用、维护方便,稳定可靠,保障了实验装置的安全、稳定运行,可以满足对现代智能化钻机的科学研究和实验教学要求。     

Drilling Power Consumption and Soil Conveying Volume Performances of Lunar Sampling Auger

The sampling auger used in lunar sampling and return mission is to transmit power and convey soil, and its performance is the key factor of the whole mission. However, there is currently a lack of the ...     

Cryogenic drilling of aluminum-based printed circuit boards: a review and analysis

Abstract

An aluminum-based printed circuit board (Al-PCB) is a composite material comprising a copper layer, an insulating layer, and an aluminum base layer. In the drilling of Al-PCBs, exit burrs are formed because of the plastic deformation of the remnant aluminum under high drilling temperatures. In this work, a new method using cryogenic media is suggested to prevent exit burrs in Al-PCB drilling. The effects of cryogenic media, such as cold air, supercritical carbon dioxide solvent (scCO₂), and liquid nitrogen (LN₂), on the drilling temperature, chip removal, tool wear and exit burr formation were observed and analyzed. The Al-PCB drilling temperature could be effectively reduced when drilling with cold air, scCO₂ or LN₂. The chip removal and tool wear could be improved when drilling with cold air or LN₂. The exit burr formation when drilling with scCO₂ or LN₂ was greater than that when drilling under cooling and cold air conditions. A cold air matching composite wood backup board (MW-0.5) could effectively control the exit burr formation within 20?μm. This is the first study on the effects of three different cryogenic media on PCB drilling and is expected to provide a good reference for the cryogenic drilling of PCBs.     

Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb rehabilitation

Robot-assisted technology has been increasingly employed in the therapy of post stroke patients to deliver high-quality treatment and alleviate therapists’ burden. This paper introduces a novel parallel end traction apparatus (PETA) to supplement equipment selection. Considering the appearance and performance of the PETA, two types of special five-bar linkage mechanisms are selected as the potential configurations of the actuation execution unit because of their compact arrangement and parallel structure. Kinematic analysis of each mechanism, i.e., position solutions and Jacobian matrix, is carried out. Subsequently, a comparative study between the two mechanisms is conducted. In the established source of nondimensional parameter synthesis, the singularity, maximum continuous workspace, and performance variation trends are analyzed. Based on the evaluation results, the final scheme with determined configuration and corresponding near-optimized nondimensional parameters is obtained. Then, a prototype is constructed. By adding a lockable translational degree of freedom in the vertical direction, the PETA can provide 2D planar exercise and 3D spatial exercise. Finally, a control system is developed for passive exercise mode based on the derived inverse position solution, and preliminary experiments are performed to verify the applicability of the PETA.     

一种液压系统试验台的研制与应用

介绍了液压系统试验台的工作原理及结构设计,同时介绍了该试验台对液压系统振动与噪声产生的原因和防治措施的探究试验,以及液压缸成品质量控制试验等方面的应用.     

基于双偏心轴驱动的声频振动钻机设计研究

基于虚拟样机技术,设计了一种双偏心惯性轴驱动的声频振动钻机的虚拟样机,分析了声频钻进方法的工作原理与特点,阐述了双偏心轴驱动的声频振动钻进系统整体设计方案与各个分系统的基本结构,在此基础上制造了实物样机,并开展了声频振动钻进技术实验研究。实验结果表明：双偏心轴型声频振动钻机结构简单、性能可靠、技术可行;声频振动钻进速度快、取样无扰动、质量高,钻进振动能量密度大,达到了设计要求。     

温湿度传感器检定装置对比实验与分析

合理选取HMP45D温湿度传感器的检定装置对提高校准质量、节约校准成本具有重要意义。文中基于本单位现有的4台温湿度检定装置,通过大量的对比实验,分析了不同装置对HMP45D温湿度传感器校准质量的差异。结果表明：恒湿盐湿度发生器和DJM10型湿度检定箱具有较高的性价比,适合作为HMP45D温湿度传感器的检定装置。具体来说,恒湿盐湿度发生器适合HMP45D温湿度传感器的现场校准工作,而湿度检定箱更适合完成室内校准任务。     

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。