双压电驱动高频喷射点胶阀的设计与实验

王凌云; 黄翔; 林四英; 林晓龙; 林志鸿

doi:10.3788/OPE.20192705.1128

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双压电驱动高频喷射点胶阀的设计与实验

微纳技术与精密机械 | 更新时间：2020-08-13

- 双压电驱动高频喷射点胶阀的设计与实验
- Design and experiment of high frequency jetting dispenser driven by double piezoelectric stacks
- 光学精密工程 2019年27卷第5期页码：1128-1137
- 作者机构：
  
  1.厦门大学深圳研究院，广东深圳 518057
  2.厦门大学机电工程系，福建厦门 361102
- 作者简介：
  
  [ "王凌云 (1978-)，男，四川通江人，副教授，博士生导师，2001年、2009年于厦门大学分别获得学士、博士学位, 主要从事微纳传感系统、微光学系统与人工视觉、流体喷射与3D打印等方面的研究。E-mail:wangly@xmu.edu.cn" ]
  [ "黄翔 (1995-)，男，浙江安吉人，硕士研究生，2017年于厦门理工学院获得学士学位，主要研究方向为流体喷射和微光学系统。E-mail: huangxiang701@163.com" ]
- 基金信息：
  
  深圳市科技计划资助项目(JCYJ20170818141912229);航空科学基金资助项目(20160868004)
- DOI：10.3788/OPE.20192705.1128
  中图分类号： TM282;TN384
- 收稿日期：2018-10-25，
  
  录用日期：2018-12-17，
  
  纸质出版日期：2019-05-15
- 稿件说明：
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王凌云, 黄翔, 林四英, 等. 双压电驱动高频喷射点胶阀的设计与实验[J]. 光学精密工程, 2019,27(5):1128-1137.

Ling-yun WANG, Xiang HUANG, Si-ying LIN, et al. Design and experiment of high frequency jetting dispenser driven by double piezoelectric stacks[J]. Optics and precision engineering, 2019, 27(5): 1128-1137.
王凌云, 黄翔, 林四英, 等. 双压电驱动高频喷射点胶阀的设计与实验[J]. 光学精密工程, 2019,27(5):1128-1137. DOI： 10.3788/OPE.20192705.1128.

Ling-yun WANG, Xiang HUANG, Si-ying LIN, et al. Design and experiment of high frequency jetting dispenser driven by double piezoelectric stacks[J]. Optics and precision engineering, 2019, 27(5): 1128-1137. DOI： 10.3788/OPE.20192705.1128.

摘要

为了满足电子封装产业对胶体高速、微量分配的需求，设计了一种基于圆弧柔性铰链放大机构的双压电陶瓷驱动喷射点胶阀。首先，利用有限元分析软件对放大机构输出位移和模态进行了计算与分析。针对其高频需求，讨论了结构参数对其影响因素。基于微元法并结合喷嘴内胶体动力学分析，建立了喷嘴内胶体喷射的流体力学模型。结合阀杆与阀座配合的仿真模型，利用FLOW-3D的流固耦合仿真，揭示了喷射点胶时胶点的成型过程。在此基础上探究了胶体喷射时喷嘴处压力的变化与流速的关系，为点胶阀参数的控制和优化奠定了基础。最后，搭建了喷射系统实验平台，选用黏度为180 cps的胶体进行点胶性能测试，得出了供料压力和驱动方波频率对胶点尺寸的影响规律。实验结果显示，在供料压力为6 bar，驱动方波幅值频率360 Hz等参数下，获得胶点最小直径为52 5 μm。同时，在380~400 Hz的频率区间内进行高频喷射实验，能够获得均匀微小的圆形胶点。实验结果验证了该圆弧柔性铰链放大机构的双压电驱动点胶阀的高频、微量喷射性能，为压电高频喷射点胶的应用和研究提供了参考。

Abstract

To meet the requirements of high-frequency and micro-scale distribution of glue

a novel jetting dispenser with a corner-filleted flexure hinge driven by double piezoelectric stacks was developed. First

the output displacement and modal of the amplifier were calculated using finite element analysis software. The influencing factors of the structural parameters were discussed with regard to the requirement of high frequency operation. Based on the microelement method and analysis of the glue dynamics in the nozzle

a hydrodynamic model of the glue jetting in the nozzle was established. Combined with the simulation model of stem and seat assemblies

a FLOW-3D fluid-structure interaction simulation was conducted to reveal the formation process of droplets during dispensing. On this basis

the change of pressure in the nozzle and its relationship with the flow rate were studied

thus preparing a foundation for the control and optimization of the parameters of the dispenser. Finally

a jetting system platform was established

glue with a viscosity of 180 cps was used to test the dispensing property

and the relations between the feeding pressure

square-wave frequency

and droplet size were determined. Experimental results indicate that a minimum droplet diameter of 525 μm is obtained when a 6-bar feed pressure and a 360-Hz square-wave frequency are used. Simultaneously

high-frequency dispensing experiments between 380 and 400 Hz yield uniform micro-droplets. These results verify the high-frequency and micro-jetting performance of the double piezoelectric jetting dispenser with a corner-filleted flexure hinge

thus providing a good reference for the application and research of piezoelectric high-frequency dispensing.

关键词

Keywords

references

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