共查询到18条相似文献,搜索用时 93 毫秒
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应变片式动态钻削测力仪是钻削及其孔加工机理研究仪及实现钻削加工过程自动监测必不可少的手段,该测力仪中用来测量轴向力及扭矩,提出了具有辅助支承的测力仪结构方案,研制了具有很小的鉴别力阈值,较高的灵敏度和较大承载能力的应变片工微小孔钻削测力仪。 相似文献
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文中提出一种新型传感器布置形式的测力仪结构,适用铣削、钻削等过程中动态切削力的测量.基于石英晶片不同切型的特点,提出了一种新的测量方式,设计了2种传感器布置形式.对测力仪原理进行分析,建立输入与输出之间的理论输出模型.分别对2种测力仪进行静态性能标定实验,结果表明:2种布置形式的测力仪的线性度和重复性误差均小于1%,并... 相似文献
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压电晶体双向动态钻削测力仪是钻削及其它孔加工机理研究以及实现钻削加工过程自动监控必不可少的手段,亦可在其它各个方向用来测量轴向力及扭力矩。本文对传感器及测力仪的结构设计、计算给以全面论述,为使测力仪获得高性能,结构上采用优化后的弹性薄壁螺纹筒夹进行予载。得到高刚性、高灵敏度,则是在这一领域中的一个创新。 相似文献
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内排屑深孔钻的钻削轴向力及扭矩测定 总被引:4,自引:0,他引:4
在深孔加工中,由于钻削作用的影响,工件材料产生变形,钻头与切屑、工件之间的摩擦产生钻削力和扭矩,导致产生切削热和钻头磨损,影响钻头耐用度和加工质量。本文讨论BTA深孔钻的钻削力及扭矩测定等问题。1BTA深孔钻钻削测力仪的设计设计测力仪弹性元件如图1所示。其A端与机床进给机构连接器相连接,B端与钻杆连接,中部C为弹性体。在C的外圆表面粘贴电阻应变片。由于钻削力的作用,弹性体产生变形,使电阻应变片的电阻值发生变化,经电桥转化为电压变化信号输出,并由电阻应变仪放大,由示波器记录、显示测量结果。图1 … 相似文献
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张军王尊豪李新阳任宗金钱敏 《仪表技术与传感器》2022,(7):123-126
针对三维动态车削力的测量需求及刀杆式、平台式压电测力仪的不足,研制了一种带有双弹性环结构的整体式压电三向车削测力仪。设计了测力仪的2种结构方案,并对比了2种方案的优劣,阐述了测力仪和压电测试系统的测量原理,对测力仪进行了静态标定实验和动态冲击实验,实验结果表明:测力仪具有优良的静、动态性能,满足了动态车削力的测量需求。 相似文献
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Research on the piezoelectric torsional effect of a rectangular quartz disc and a novel drilling dynamometer 总被引:1,自引:0,他引:1
The theoretical foundation of a new-type drilling dynamometer (i.e. the torsional effect of a rectangular piezoelectric quartz disc), the structure design and calibration of the drilling dynamometer are investigated in this paper. By using the theory of anisotropic elasticity and the Maxwell electromagnetism, the torsion stress and the distribution of surface charge densities of a rectangular quartz disc are calculated. According to the theoretical analyses of the bound charge densities, the detection electrodes are effectively disposed on the surface of the piezoelectric disc. The experimental results show that the torsional effect exists in the rectangular quartz disc and the bound charges are linear with the torque applied. Based on the torsional effect, a new type of drilling dynamometer is designed, in which only four quartz discs are used. The axial force measuring cell consists of two X0°-Cut quartz discs, and by the partitioned electrode method only two Y0°-Cut quartz discs can simultaneously sense the radial force and torque. After static calibrations, the torque sensor has full reached the dynamometer standard stipulated by CIRP-STCC. Undoubtedly the drilling dynamometer will provide a new method for measuring the drilling force and monitoring the drilling process. 相似文献
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《Measurement》2014
Tool geometry optimization, workpiece material characterization, process monitoring and optimization are based on the measurement of cutting forces by using machining dynamometers. Commercial dynamometers cover a wide range of machining applications, nevertheless there is a lack of measuring devices suitable for investigating milling and drilling applications with relatively small cutters and high spindle speeds. In this work, the development and testing of an innovative plate dynamometer designed for this purpose is discussed. The new measuring system was based on three high-sensitive triaxial piezoelectric force sensors arranged in a novel triangular configuration. Component design was optimized by using FE numerical approaches, according to the general guidelines derived from mathematical modeling of sensor dynamics. The prototype of the proposed device was manufactured and experimentally tested against two high-end commercial plate dynamometers by performing static calibration, modal analysis and cutting tests. Experimental results proved the excellent characteristics of the new device and its effectiveness for investigating advanced machining applications. 相似文献
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Design, calibration and error analysis of a piezoelectric thrust dynamometer for small thrust liquid pulsed rocket engines 总被引:1,自引:0,他引:1
Small thrust liquid pulsed rocket engines operating in pulsed mode have gained a good reputation in attitude control applications for their potential reliability and efficiency. However, the pulsed characteristic creates a difficult measurement problem. In this paper, a novel thrust dynamometer with high natural frequency is developed for accurately measuring the pulsed thrust. It consists of two shear mode piezoelectric quartz crystal sensors and an integral shell. The sensors are inserted into unique double-elastic-half-ring grooves with an interference fit. Stiffness equations of the shell which are used to estimate the amount of interference are derived. The thrust dynamometer is calibrated both statically and dynamically. Static calibration uncertainty is evaluated. A trapezoidal impulse force is used to simulate the pulsed thrust for further characterizing the dynamic measurement performance of the thrust dynamometer. An evaluation algorithm of dynamic error is presented and used to evaluate the results of the dynamic simulation. The results show the thrust dynamometer has high sensitivity and natural frequency, good linearity and repeatability, and excellent dynamic performance. It can accurately trace trapezoidal thrust signal of 50 Hz without waveform distortion. 相似文献
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Development and evaluation of tool dynamometer for measuring high frequency cutting forces in micro milling 总被引:1,自引:0,他引:1
Ik-Soo Kang Jeon-Ha Kim Chinsuk Hong Jeong-Suk Kim 《International Journal of Precision Engineering and Manufacturing》2010,11(6):817-821
A tool dynamometer is developed for measuring the high frequency cutting forces, and evaluated in micro milling of aluminum
6061-T6 using a tungsten carbide (WC) micro end mill. To improve the accuracy and productivity of the machining process, it
is essential to monitor and control the machining process by measuring cutting forces. In order to improve the precision and
quality of machined parts, high-speed machining with smaller micro tools is required, causing higher frequency cutting forces.
The first natural frequency of tool dynamometers is high enough to precisely measure the high cutting forces. We investigate
dynamic characteristics of the tool dynamometer theoretically and experimentally. The measurable frequency range of the developed
tool dynamometer was higher than the commercial tool dynamometer, and the measured cutting force signals were not distorted
at high-speed of above 60,000 rpm. The results showed that the developed dynamometer is able to measure the static and dynamic
force components in high-speed micro milling. 相似文献