共查询到19条相似文献,搜索用时 156 毫秒
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针对人工测量螺旋缝埋弧焊管周长测量速度慢、精度误差大等问题,提出一种在线测量系统。介绍该在线测量系统的测量原理、结构、功能实现方式和现场应用情况,并分析造成系统测量误差的原因。该系统采用非接触测量方法,可在高焊出速度工况下实现对大直径螺旋缝埋弧焊管周长的高精度在线测量,并形成周长变化趋势。该系统的测量精度和测量速度均满足实际生产中钢管在线测量的要求,实现了螺旋缝埋弧焊管成型工位周长参数的在线实时测量。 相似文献
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为锁芯自动装配机床设计了钥匙齿形码自动识别系统,系统通过测量齿高来识别,并讨论了其测量误差的组成及其影响因素。分析了温度对系统产生零点漂移和测量比例系数变化的影响,并采用软件补偿技术对系统的误差进行了校正。在实际应用过程中取得了良好的效果,提高了锁芯自动装配系统的效率和准确性。 相似文献
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FFT时域法测量电极阻抗 总被引:3,自引:3,他引:0
建立了由AppleⅡ~+微机和自制的电化学接口仪组成的时域法电极阻抗测量系统。该测量系统以奇次谐波合成的伪随机白噪声作为激励信号,以FFT作为时频变换的工具,并采用了信号平均技术以提高信噪比。用该测量系统测量模拟电路和实际电化学体系,其结果分别与SOLARTRON1250频响分析仪和文献数据接近。最后还讨论了时域法测量电极阻抗的激励信号的选择、测量频率上、下极限和噪声影响等问题。 相似文献
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恒力液压机能实现加载力、位移或其速率的恒定。测控系统以小型PLC为控制核心,位移测量采用光栅尺,并采用PLC中断程序进行4倍频处理以提高测量精度,压力测量采用带有通讯功能的高性能调理转换模块代替性能有限的PLC的A/D模块,显著提高了测量分辨率和精度。自编的PID算法充分发挥了PLC的性能,提高了闭环控制精度。液压机的参数设定、显示由触摸屏完成,而长期的数据保存、输出由上位机实现。试验结果表明,测控系统达到了设计要求。 相似文献
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研发了一种用来测量六轴焊接机器人末端位置和方向的新型测量系统,该测量系统通过5个数字探头来获取焊接机器人末端的位置和方向等运动学参数。在六轴焊接机器人工作前,进行了末端位置测量系统的标定,标定后系统的定位精度为0.025 mm,定向精度为0.075°。实验中,通过末端测量系统得到了焊接机器人控制器增益调节过程中的位姿,并结合田口法找到了最佳控制器增益。实验结果表明,采用最佳控制器增益的焊接机器人末端的振动得到了有效抑制,在高频段的末端振动幅度降为原来的54%。对于多轴焊接机器人的控制具有重要价值。 相似文献
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针对某工厂10米重型数控单臂立车的综合偏摆,基于数据采集卡和LabVIEW软件建立了在线误差监测的虚拟仪器测量系统,并进行现场试验与应用。该系统硬件平台使用高精度电涡流传感器检测偏移距离,并采用滤波、均值和屏蔽等软件编程措施,实现了数据的处理、保存、报警及远程监控等功能。实验结果表明该测量系统能满足加工过程中对机床精度和稳定性的需求,有效地克服了现场干扰,保证了测量准确性,提高了设备精度检测及维修效率。 相似文献
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设计了采用质量流量计的纸桨测量系统.介绍了该测量系统的原理、硬件组成及程序设计.重点介绍了硬件中的MC146818主板时钟电路、积算器和各个接口与主控单片机的连接以及误差处理方法.并通过现场的实际运行,验证了该系统具有高精度和稳定性好的特点. 相似文献
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F.A. Slooff J. ZhouJ. Duszczyk L. Katgerman 《Journal of Materials Processing Technology》2011,211(7):1241-1246
In the present study, the results of uniaxial compression tests were used to predict the pressure required for extruding a wrought magnesium alloy Mg-Al4-Zn1 under different conditions. The breakthrough and steady-state extrusion pressures were calculated using a strain-dependent constitutive equation and verified by laboratory-scale extrusion experiments. A good agreement was achieved between the calculated and measured extrusion pressure at different ram speeds and reduction ratios for different extrudate shapes. A correlation of the peak extrusion pressure with modified reduction ratio and ram speed was established. 相似文献
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Ductility of a magnesium alloy in warm forging with controlled forming speed using a CNC servo press
The influence of press ram motion on forging performance for magnesium alloys was examined at elevated temperatures using an upsettability test on a CNC servo press. The forging limit of a wrought AZ31B (Mg–3 mass%Al–1 mass%Zn) magnesium specimen, forged using applied deceleration of the press ram motion, was found to be 30% higher than the forging limit achieved without press ram motion control. A finite element analysis was conducted to model the experimental results. The calculated temperature distribution was relatively uniform during upsetting with decelerated ram motion, and the maximum equivalent strain was maintained at a low level. Experimental and simulation results suggested that the influence of the press ram motion on the ductility of the Mg specimen could be described by a strain localization model. Furthermore, the ductility of Mg specimens during decelerated ram motion was improved in backward extrusion. 相似文献
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Liu Deshun 《中国有色金属学会会刊》1996,(2)
ANAPPROACHFORCONTROLLINGOSCILLATIONINDYNAMICSTRESS-STRAINMEASUREMENTLiuDeshun(XiangtanMiningInstitute,Xiangtan411201LiXibing;... 相似文献
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Ryo Matsumoto Takahiro Chida Shinji Hanami Hiroshi Utsunomiya 《Journal of Materials Processing Technology》2014,214(10):1995-2001
A plastic joining method for fixing bars and hot plates, called “indentation plastic joining”, was carried out using a servo press with press ram speed control. The influence of the press ram motion control on the indentation joining characteristics of an aluminum alloy bar and plate was examined. The accelerated ram motion was effective in reducing the bar indentation pressure by approximately 15% and the bonding strength of the indented bar–plate was improved by approximately 7%. The bonding mechanism underlying the indention joining method under press ram motion control is discussed in terms of the seizure of the plate and the mechanical clamping associated with the process. It is found that the accelerated ram motion produces heavier seizure at the indented bar–plate interface, whereas the decelerated ram motion reduces the degree of the seizure. 相似文献
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