含柔性放大臂的超磁致伸缩高速点胶阀研究

【作者】 陈津；

【导师】 邓圭玲；

【作者基本信息】 中南大学 ， 信息器件制造技术与装备， 2011， 硕士

【摘要】 喷射点胶是一种非接触式点胶技术,具有传统的接触式点胶技术无法比拟的优势,逐渐成为微电子封装领域的主流点胶技术。超磁致伸缩材料(GMM)是一种新型的功能材料,在外界磁场的作用下可以产生较大的应变,常被用来制作微位移驱动器。本文在前人的研究基础上,对一种新型的超磁致伸缩驱动的喷射点胶阀做了优化。本文的主要研究工作如下：1.建立了点胶阀的数学模型和仿真模型,实测数据和仿真数据的对比结果说明了仿真模型能较为准确地反映点胶阀的实际工作情况；2.对点胶阀的励磁线圈和柔性铰链放大臂做了优化设计,介绍了线圈的设计方法,开发了线圈设计软件。对柔性铰链放大臂的结构做了改进,对比了前后两种放大臂的受力状态,分别给出了两种放大臂柔性铰链的强度校核方法并做了校核对比。3.对点胶阀的动态性能进行了实验研究。通过对点胶阀喷针位移曲线的分析,发现了点胶阀存在的问题,提出了喷针位置的调整方法,解决了先前点胶阀不能稳定将胶液喷出的问题,使点胶阀的性能有了较为明显的改善,并使点胶阀的稳定工作频率从原先的35Hz提高到了目前的200Hz以上。4.对点胶工艺开展了探索性的实验,研究了控制信号高压时间、驱动电流及供胶压力对胶点尺寸的影响,用高速摄像系统观察了胶液喷射过程,展示了几种基本点胶图案的效果。更多还原

【Abstract】 Jet dispensing is a non-contact dispensing technology. It has some inherent advantages over traditional contact dispensing technology. Giant magnetostrictive material(GMM) is a new functional material and usually used on micro-displacement actuator. On the basis of other’s research, this paper do some optimization research on a jet dispenser driven by giant magnetostrictive actuator. The main research work are as follows:1. The dispenser’s mathematics model and emulational model are established. The comparison of measured data and simulation data demonstrates that the model can correctly reflect the dispenser’s actual working situation.2. The coil and lever with flexure hinge is designed and optimized. The design method of the coil is introduced and a software used to design the coil is developed. The structure of the lever with flexure hinge is improved, the strained condition contrast of the former and current levers is presented, the mechanical strength checking methods of the two levers are presented respectively and the checking examples are given.3. Experiments on the dispenser’s dynamics is carried out. Through analysing the displacement curve of the dispenser’s needle, some problems are found, some methods on relocating the needle are presented, the problem that the dispenser can’t jet steadily is solved perfectly, the dispenser’s performance is improved obviously, the dispenser’s working frequency has been promoted to above 200Hz from previous 35Hz.4. Some groping experiments on dispensing industrial art are carried out. The differences to the size of the fluid dots made by pulse width of control signal, driving current and gas pressure are researched, the fluid jetting process is observed under the help of the high frame vision system, some basic patterns dispensed are shown.更多还原