麻花钻切削槽内流体温度和麻花钻油膜摩擦理论研究

本文从流体力学的角度,研究麻花钻切削液的温度分布,麻花钻与工件表面之间的摩擦力对加工表面粗糙度的影响.这种研究结果与钻削加工的工艺分析完全一致,可以证明这是一种研究钻削面粗糙度很有效的方法,并且可以直接应用于钻削加工的理论研究和分析

Realization and tests of acoustic-electric slipping sensor

滑觉检测是机械手实现软抓取的关键环节,提出了一种简易低成本的、以声电转换器为基础的滑觉传感器,该传感器通过声电转换器拾取由接触与滑动产生的微振动信号,并将其转换成电信号。具体介绍了以声电转换器为基础实现滑觉传感器的测试分析过程,并介绍了该传感器的结构与工作原理、调理电路和信号处理。测试分析结果表明:该传感器可提供有效的接触与滑动信号,其研究与应用具有一定的可行性。Slipping detection is important for manipulator grasping object reliably.A simple and low-cost slipping sensor based on acoustic-electric converter is presented.The sensor picked up the micro-vibration signal caused by touching and sliding,and converted it into electric signal by acoustic-electric converter.The test and analysis of the realization processes of the sensor is described in detail.The structure,working principle,conditioning circuit and signal processing of the sensor is introduced.The result of the test and analysis demonstrates that it can provide effective touching and sliding signals,and the study and application of the sensor have certain feasibility

Hydraulic System Design and Research of Log-core Veneer Lathe

该文详细分析了无卡轴旋切机的工作原理,推导了旋切过程中刀刃进给速度与圆木直径的数学模型,并推导出液压系统流量计算公式,从而得出:旋切过程中液压缸的流量必须随刀刃进给速度按一定规律变化,以保证旋切机正常工作;根据变速进给模型,设计了无卡轴旋切机的液压系统。新型液压系统使用后延长了无卡轴旋切机的寿命,降低了系统的能耗,减小了噪声,并具有易操作的特点

The Development and Application of a New Multi-position Cylinder

【中文文摘】本文介绍了串联式多位气缸、数字步进气缸的结构特点和工作原理 ,指出存在的缺点。并介绍了一种新型的多位气缸的设计、工作原理和结构特点。 【英文文摘】The structure features and work principles of the multi-position series cylinder and the digital step-cylinder were introduced. Furthermore, in order to overcome the defects of the two types of cylinders,a new type of multi-position cylinder was designed and its structure features and work principles were introduced

Design of silicon micro machined wave guide pressure sensor

随着波导材料的研究和进展 ,采用新的波导材料设计出了一种波导式压力传感器 ,就光波导压力传感器的原理和特性作了一个简要阐述 ,对它的工艺流程作了详细的描述With the development and research of wave guide material,the new wave guide materials were adopted to design a new optical wave guide pressure sensor.The structure,character and principle of the optical wave guide pressure sensor were expounded here.The fabrication process was discussed

Design of Pressure Distribution Measurement System for Tooth

介绍了一种能测牙齿咬合力大小与分布的测量系统;利用导电橡胶的压阻特性设计了一测力传感器阵列,叙述了传感器阵列的结构和制造方法,设计了调理电路,数据采集卡采用uSb-6009;软件以lAbVIEW为平台,设计了数据采集模块、分析处理与显示模块。通过实验,验证了系统的可行性。This paper describes a measurement system which is used for dental bite force and its distribution.A senor array is designed based on the press-resistive property of the conductive rubber,its structure and manufacturing method are described here.The signal process circuit for sensor array is designed,too.The Data Acquisition card which called USB-6009 from NI Corporation is adopted.The system software is programed by LabVIEW platform,which includes data acquire block,data process block and display block.The system is verified to pass by experiments at last

Hydraulic System Dynamic Simulation Based on Bond Graphs Modelling

介绍了功率键合图的基本概念,并以自主研制的全自动液压控制冻盘成型机的液压系统为例,讨论了键合图的建立及状态方程的建立,并结合MATLAB强大的数字仿真功能对液压系统动态响应进行了数字仿真。充分体现了功率键合图在动态系统特征分析中的特点和优势。The fundamental concept of power bond graphs was introduced,and taking the hydraulic system of self established automatic hydraulic controlled frozen plate moulding machine as an example,how to establish bond graphs,status equations,and digital simulation of dynamic responses in a hydraulic system was discussed combined with MATLAB.It fully embodies the charcteristics and advantages of power bond graphs uesed in dynamic system analysis

The Dynamic Characteristics and Stimulation of the New Type of Multi-position Pneumatic Cylinder

【中文文摘】在分析新型多位气缸运动过程的基础上 ,应用热力学和空气动力学的基本理论 ,对新型多位气缸的每一个行程都建立了动态特性数学模型 ,采用四阶龙格 -库塔法对各腔压力变化、活塞位移和运动速度进行了数字仿真。这对了解该新型多位气缸的性能和实际应用提供了重要依据。 【英文文摘】Basing on the analysis of the moving process of the new type of multi-position pneumatic cylinder,applying the basic theories of thermodynamics and aerodynamics,the mathematical model of dynamic characteristics of the new type of multi-position pneumatic cylinder were set up.The pressure in the pneumatic chamber,the displacements and the speeds of the piston were simulated by four-step Rounge-Kutta.It provides important parameters for making use of this pneumatic cylinder

Design problem of small-sized continuous straightening mechanism of reinforcing bars

【中文摘要】利用使钢筋完全受拉力作用产生塑性变形而被拉直的原理 ,设计一种便于在建筑工地上使用的小型的钢筋连续拉直切断机。通过设计验算 ,说明目前设计中存在的一些问题 ,寻求解决措施。 【英文摘要】To design a small sized continuous straightening mechanism based on the principle that a bar can be straightened when pulled to the surrender pressure was put forward in this paper But now there are some problems to be solve

New Kind of Touch Mode Capacitive Pressure Sensor

与其他类型压敏器件相比,接触式电容压力传感器(TMCPS)有着明显的优点,例如较好的线性,高灵敏度和大过载保护能力等。为了达到更好的性能,设计了一种新型的接触式电容压力传感器(DTMCPS),这种新型的结构是在传统的TMCPS的底部电极上刻蚀了一个浅槽。与现有的接触式电容压力传感器相比,这种结构可以实现更好的线性和更大的线性范围。使用有限元分析软件对膜片的变形进行了分析并阐述了传感器的结构和工艺过程。分析结果表明这种新型结构的传感器可以在保持传统结构优点的同时实现更高的灵敏度,更好的线性和更大的线性范围。Touch mode capacitive pressure sensor(TMCPS) has distinct advantages over other pressure sensors.To achieve better characteristics,a new type of touch mode capacitive pressure sensor named DTMCPS was devised,which had an additional thin notch on the bottom electrode of traditional TMCPS.Compared to present touch mode capacitive pressure sensors,the new sensor is characterized by better linearity and large linear operation range.Finite element analysis(FEA) was employed to model the structural deformation of this device.After that,the structure and fabrication process of the sensor were given