精密微小组件压装技术及仪器
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摘要
根据一种过盈联接精密微小组件的装配要求,研制了一套精密微小组件自动压装仪器。通过分析压装过程中压装力与系统弹性变形的变化关系,对组件的压装位移进行了有效补偿。采用具有上下视野的机器视觉装置测量压装组件的相对位置,并采用XY位移平台对组件进行精确对准。提出了对具有上下视野的机器视觉装置的标定方法;分析了组件压装力与压装位移的关系,得出了压装力-位移曲线的预测值。对随机抽取的5套零件进行了装配实验,结果表明:对组件进行精密对准后,组件压装位移-压装力曲线符合预测值;组件装配后相对位置的距离偏差小于±5μm,垂直度偏差小于10μm。实验表明组件装配精度达到了设计指标要求。
According to the assembling demands of precise small parts with interference fitting,a precision pressing-fitting instrument for assembling small parts was developed.Through analyzing the relation of pressing-fitting force and the instruments elastic deformation in pressing-fitting process,the partspressing-fitting displacement was compensated to increase assembly accuracy.A kind of machine vision device with upper and lower vision fields was used to detect relative situation of parts,and a XYdisplacement platform was used to align the positions of the parts.A calibration method of the machine vision device was proposed.The relation between pressing-fitting force and pressingfitting displacement was analyzed,and the predicted values of force and displacement were proposed to judge the assembly rationality.Five kinds of parts obtained randomly was assembled. The experimental results show that pressing displacement-pressing force curve is consistent with the predicted values.The partsrelative position deviation is less than ±5μm,and vertical deviation is less than 10μm,which meets the requirements of the assembly accuracy index.
According to the assembling demands of precise small parts with interference fitting,a precision pressing-fitting instrument for assembling small parts was developed.Through analyzing the relation of pressing-fitting force and the instruments elastic deformation in pressing-fitting process,the partspressing-fitting displacement was compensated to increase assembly accuracy.A kind of machine vision device with upper and lower vision fields was used to detect relative situation of parts,and a XYdisplacement platform was used to align the positions of the parts.A calibration method of the machine vision device was proposed.The relation between pressing-fitting force and pressingfitting displacement was analyzed,and the predicted values of force and displacement were proposed to judge the assembly rationality.Five kinds of parts obtained randomly was assembled. The experimental results show that pressing displacement-pressing force curve is consistent with the predicted values.The partsrelative position deviation is less than ±5μm,and vertical deviation is less than 10μm,which meets the requirements of the assembly accuracy index.
引文
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[4]张习文,王晓东,罗怡,等.精密微小型零件自动装配系统显微机器视觉的照明自动优化[J].光电工程,2012,39(4):14-20.ZHANG X W,WANG X D,LUO Y,et al..Automatic illumination of microscopic machine vision optimization for precision miniature parts automatic assembly system[J].Opto-Electronic Engineering,2012,39(4):14-20.(in Chinese)
[5]赵林惠,王强,张建成,等.面向某微小型平板类零件的微装配系统研究[J].现代制造工程,2013,(3):77-80.ZHAO L H,WANG Q,ZHANG J CH,et al..Research on micro-assembly system for the microplate parts[J].Modern Manufacturing Engineering,2013,(3):77-80.(in Chinese)
[6]唐永龙,张之敬,张晓峰,等.微装配正交精确对准系统的设计[J].光学精密工程,2012,20(7):1542-1550.TANG Y L,ZHANG ZH J,ZHANG X F,et al..Design of precise alignment orthogonal system used in micro-assembly[J].Opt.Precision Eng.,2012,20(7):1542-1550.(in Chinese)
[7]张之敬,杜芳,金鑫,等.微小尺寸零件复杂边缘识别算法[J].光学精密工程,2009,17(2):356-361.ZHANG ZH J,DU F,JIN X,et al..Complex edge recognition algorithm of micro-accessory[J].Opt.Precision Eng.,2009,17(2):356-361.(in Chinese)
[8]DAS A N,POPA D O,STEPHANOU H E.Automated Microassembly using Precision based Hybrid Control[C].2010 IEEE International Conference on Robotics and Automation,Anchorage,Alaska,USA,2010:4106-4113.
[9]XU Z,WANG J Y,WANG D J,et al..Flexible microassembly methods for micro/nanofluidic chips with an inverted microscope[J].Microelectronic Engineering,2012,97:1-7.
[10]娄志峰,王晓东,由博,等.一种微小零件夹持装置:中国,CN201310143556.1[P].2014-06-15.LOU ZH F,WANG X D,YOU B,et al..A tiny part clamping device:China,CN201310143556.1[P].2014-06-15.(in Chinese)
[11]徐征,王晓东,程新宇,等.基于机器视觉的微装配控制策略及软件架构[J].光学精密工程,2009,17(4):819-824.XU ZH,WANG X D,CHENG X Y,et al..Control tactics and software architectures for micro-assembly based on machine vision[J].Opt.Precision Eng.,2009,17(4):819-824.(in Chinese)
[12]胡菊云.衔铁组件过盈装配技术研究[D].大连:大连理工大学,2013.HU J Y.Research on interference fit technology of armature modules[D].Dalian:Dalian University of Technology,2013.(in Chinese)