共查询到19条相似文献,搜索用时 656 毫秒
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微挤压成形系统的设计与实现 总被引:2,自引:1,他引:1
针对微挤压成形工艺要求,设计开发了一种微挤压成形系统,该系统装置采用压电陶瓷为驱动器,以实现成形速度的精确控制;利用压簧-楔块机构实现自动进给,减少了人工操作步骤;通过计算机控制系统与传感器,实现对微挤压成形过程的实时控制及数据采集。在室温条件下,使用该成形系统对铅丝坯料进行微挤压实验研究,结果表明,成形装置受力形变对挤压结果产生的影响可以通过适当的预紧力得到改善,从而成形出轮廓清晰的微型齿轮,验证了该研究方案的可行性,为后续的微型金属零件成形研究提供技术依据。 相似文献
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面向微操作的宏/微精密定位技术研究 总被引:1,自引:0,他引:1
宏/微精密定位技术是微操作机器人的关键技术之一.在分析微操作机器人对宏微结合的精密定位技术需求的基础上,介绍了微米级宏动定位系统以及纳米级微动定位技术的实现方法.最后总结了压电陶瓷驱动纳米定位技术中的机构、驱动、检测、控制等关键问题的研究现状,并对微定位技术发展趋势进行了展望. 相似文献
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Zr基非晶合金微塑性成形工艺研究 总被引:1,自引:0,他引:1
研究了Zr41.2Ti13.8Cu12.5Ni10Be22.5块体非晶合金(Vit.1)在370~430℃区域内等温压缩变形行为,获得其高温粘性流变规律。利用透射电镜分析Vit.1在370℃时应变软化及420℃时应变强化现象。根据所确定的高温变形工艺参数,使用快速加热精密微塑性成形系统进行了Vit.1微型齿轮成形试验,研究不同温度及载荷下的齿轮成形工艺。利用扫描电镜、原子力显微镜和显微硬度计对成形件的表面形貌和性能分析结果表明,在温度395℃及载荷350N条件下成形出的非晶合金微型齿轮性能均匀表面光洁度好,利用此微成形工艺可以获得质量良好的微型零件。 相似文献
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二维微动工作台的设计与分析 总被引:1,自引:0,他引:1
设计了一种用于宏微双重驱动系统的二维微动工作台。该微动平台采用柔性铰链支撑的并联式设计结构,该结构比串联式结构更简单紧凑,其x方向和y方向完全对称,所以这两个方向的参数完全相同,便于参数识别与工作台控制;采用有限元方法对该工作台进行了静态分析,并与采用解析法计算的结果进行对比。推导出由于宏动工作台高加速运动而引起微动工作台振动的加速度公式,为研究宏动台高加速、高减速运动对微动工作台的影响提供了依据。最后,计算分析了宏动工作台典型运动情况对微动工作台的影响,分析表明选择合适的阻尼比ξ,可以获得较短的微动工作台系统的调整时间和较小的超调量。 相似文献
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《组合机床与自动化加工技术》2020,(10)
为了实现宏微复合平台的精密定位,防止压电陶瓷行程饱和,对宏微平台之间的耦合影响进行了研究,分析了宏微平台耦合效应的产生机理,提出基于干扰观测器的前馈补偿解耦复合PID控制方法,保证微平台对宏平台误差的精密补偿。通过对直线电机系统和宏微平台之间的耦合传递函数进行模型辨识,设计了干扰观测器(DOB)和前馈补偿解耦控制器,并结合PID控制组合成为复合控制,在宏微复合平台上开展实验研究。实验结果表明:复合控制下的宏动台耦合位移的绝对值平均减小79.46%,压电陶瓷进行微定位时的行程平均减小38.83%,微定位时间至少减小43.37%。从而验证了该文所提方法的有效性。 相似文献
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The mechanical behavior of superplastic 5083 aluminum alloy during microforming process was investigated by finite element analysis.A micro V-groove die was modeled to analyze the effects of forming time,load and temperature on the microformability of the 5083 aluminum alloy.First,the microformability of the 5083 aluminum alloy was estimated using a microformability index.The simulation results show that the microformability increases with the forming load,time and temperature increasing.Superplasticity of the 5083 aluminum alloy during microforming using the V-groove die was also investigated in terms of the effective strain rate.The results show that the superplasticity of the 5083 aluminum alloy occurs in a specific part of the material for a specific period during the microforming process depending on the forming conditions and the microformability index. 相似文献
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Jie Xu Bin Guo Debin Shan Chunju Wang Juan Li Yanwu Liu Dongsheng Qu 《Journal of Materials Processing Technology》2012,212(11):2238-2246
Micro-forming technology poses much higher demands on positioning accuracy, velocity and mass production, and the common forming machines cannot satisfy these requirements using traditional drive methods. Micro-forming equipment using novel drive methods with high speed and high precision has become an important research field for industrial application. In the paper, a novel drive mechanism was designed with a symmetric distributed double linear motors and a micro-forming system was developed with micro-punching tools and automatic feeding apparatus for metal foil. The servo control system of this micro-forming system was designed using SIMOTION D445, and a parallel control model was adopted with a single motor module to solve the synchronous control problems of double linear motors. Micro-punching process of brass foil was studied with the micro-forming system, and micro-holes of 600 μm, 300 μm and 150 μm in diameter were manufactured with high dimensional accuracy. An array of 50 × 4 micro-holes, each 600 μm in diameter, was manufactured using an automatic feeding apparatus guided by a microscopic visualization system for assisted localization. The results indicate that the micro-forming system with high-accuracy and high-speed is suitable for the mass production of micro-scale parts. 相似文献
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介绍激光测距技术在某型直升机桨毂限动器角度在线测量中的应用,阐述了限动器角度在线测量原理、设备结构、测量方法等内容。限动器角度在线测量设备采用激光测距技术和伺服系统控制技术,实现了测试过程的智能化。基于KingView应用软件平台,通过高精度激光测距传感器精确测量限动器打开或闭合的距离值,输入至计算机进行计算,获得限动器打开、闭合过程的角度值,以判定限动器在规定转速下打开、闭合是否符合工艺要求。角度值通过高精度角度检测工装进行校验,以确保测量数据准确、可靠。该设备已在多型直升机限动器测试中应用,显著提高了测试效率和测量精度。 相似文献
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Recently, precision machining technology has been developed continuously in order to achieve high productivity and assured quality of precision parts in several industrial fields such as; lasers, optics, quartz vibrators, semiconductors, aircraft and artificial satellites etc. Waviness may occur on the surface of machined parts due to the table motion error and the dynamic cutting mechanism between the tool and the workpiece and may impair the form accuracy of the precision machined parts. In this research, a micro cutting device with piezo-electric actuator has been developed in order to control depth of cut precisely and compensate the waviness on the surface of the workpiece. Experiments have been carried out on a precision lathe. The characteristics of the surface profile and the cause of the waviness profile have been analyzed and waviness profiles of some cases have been compared with those of experiments. 相似文献